Argon. A noble gas with the atomic symbol Ar, atomic number 18, and atomic weight 39.948. It is used in fluorescent tubes and wherever an inert atmosphere is desired and nitrogen cannot be used.
The pressure at any point in an atmosphere due solely to the weight of the atmospheric gases above the point concerned.
A syndrome related to increased atmospheric pressure and characterized by tremors, nausea, dizziness, decreased motor and mental performance, and SEIZURES. This condition may occur in those who dive deeply (c. 1000 ft) usually while breathing a mixture of oxygen and helium. The condition is associated with a neuroexcitatory effect of helium.
Elements that constitute group 18 (formerly the zero group) of the periodic table. They are gases that generally do not react chemically.
Progressive mental disturbances and unconsciousness due to breathing mixtures of oxygen and inert gases (argon, helium, xenon, krypton, and atmospheric nitrogen) at high pressure.
Ionized gases, consisting of free electrons and ionized atoms or molecules which collectively behave differently than gas, solid, or liquid. Plasma gases are used in biomedical fields in surface modification; biological decontamination; dentistry (e.g., PLASMA ARC DENTAL CURING LIGHTS); and in other treatments (e.g., ARGON PLASMA COAGULATION).
The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment.
A noble gas that is found in the atmosphere. It has the atomic symbol Kr, atomic number 36, atomic weight 83.80, and has been used in electric bulbs.
Measurement of the amount of air that the lungs may contain at various points in the respiratory cycle.
A polyvinyl resin used extensively in the manufacture of plastics, including medical devices, tubing, and other packaging. It is also used as a rubber substitute.
Deliberate introduction of air into the peritoneal cavity.
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
Neon. A noble gas with the atomic symbol Ne, atomic number 10, and atomic weight 20.18. It is found in the earth's crust and atmosphere as an inert, odorless gas and is used in vacuum tubes and incandescent lamps.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Techniques where DNA is delivered directly into organelles at high speed using projectiles coated with nucleic acid, shot from a helium-powered gun (gene gun). One of these techniques involves immunization by DNA VACCINES, which delivers DNA-coated gold beads to the epidermis.
The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.
The volume of air remaining in the LUNGS at the end of a normal, quiet expiration. It is the sum of the RESIDUAL VOLUME and the EXPIRATORY RESERVE VOLUME. Common abbreviation is FRC.
An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.
The pressure due to the weight of fluid.
Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.
The therapeutic intermittent administration of oxygen in a chamber at greater than sea-level atmospheric pressures (three atmospheres). It is considered effective treatment for air and gas embolisms, smoke inhalation, acute carbon monoxide poisoning, caisson disease, clostridial gangrene, etc. (From Segen, Dictionary of Modern Medicine, 1992). The list of treatment modalities includes stroke.
A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
The volume of air contained in the lungs at the end of a maximal inspiration. It is the equivalent to each of the following sums: VITAL CAPACITY plus RESIDUAL VOLUME; INSPIRATORY CAPACITY plus FUNCTIONAL RESIDUAL CAPACITY; TIDAL VOLUME plus INSPIRATORY RESERVE VOLUME plus functional residual capacity; or tidal volume plus inspiratory reserve volume plus EXPIRATORY RESERVE VOLUME plus residual volume.
Lasers in which a gas lasing medium is stimulated to emit light by an electric current or high-frequency oscillator.
Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)
Recording of change in the size of a part as modified by the circulation in it.
Nuclear reaction in which the nucleus of a heavy atom such as uranium or plutonium is split into two approximately equal parts by a neutron, charged particle, or photon.
Antineoplastic agent that is also used as a veterinary anesthetic. It has also been used as an intermediate in organic synthesis. Urethane is suspected to be a carcinogen.
Any hindrance to the passage of air into and out of the lungs.
Methods for assessing flow through a system by injection of a known quantity of an indicator, such as a dye, radionuclide, or chilled liquid, into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
An activity in which the organism plunges into water. It includes scuba and bell diving. Diving as natural behavior of animals goes here, as well as diving in decompression experiments with humans or animals.
The exchange of OXYGEN and CARBON DIOXIDE between alveolar air and pulmonary capillary blood that occurs across the BLOOD-AIR BARRIER.
An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
A noble gas with the atomic symbol Xe, atomic number 54, and atomic weight 131.30. It is found in the earth's atmosphere and has been used as an anesthetic.
The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract.
Anesthesia caused by the breathing of anesthetic gases or vapors or by insufflating anesthetic gases or vapors into the respiratory tract.
A procedure involving placement of a tube into the trachea through the mouth or nose in order to provide a patient with oxygen and anesthesia.
The total volume of gas inspired or expired per unit of time, usually measured in liters per minute.
Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.
The physical or mechanical action of the LUNGS; DIAPHRAGM; RIBS; and CHEST WALL during respiration. It includes airflow, lung volume, neural and reflex controls, mechanoreceptors, breathing patterns, etc.
Agents that are capable of inducing a total or partial loss of sensation, especially tactile sensation and pain. They may act to induce general ANESTHESIA, in which an unconscious state is achieved, or may act locally to induce numbness or lack of sensation at a targeted site.
The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).
The chemical reactions that occur within the cells, tissues, or an organism. These processes include both the biosynthesis (ANABOLISM) and the breakdown (CATABOLISM) of organic materials utilized by the living organism.
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
Any method of artificial breathing that employs mechanical or non-mechanical means to force the air into and out of the lungs. Artificial respiration or ventilation is used in individuals who have stopped breathing or have RESPIRATORY INSUFFICIENCY to increase their intake of oxygen (O2) and excretion of carbon dioxide (CO2).
A state characterized by loss of feeling or sensation. This depression of nerve function is usually the result of pharmacologic action and is induced to allow performance of surgery or other painful procedures.
The volume of air inspired or expired during each normal, quiet respiratory cycle. Common abbreviations are TV or V with subscript T.
The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
Elements of limited time intervals, contributing to particular results or situations.
Exposure of myocardial tissue to brief, repeated periods of vascular occlusion in order to render the myocardium resistant to the deleterious effects of ISCHEMIA or REPERFUSION. The period of pre-exposure and the number of times the tissue is exposed to ischemia and reperfusion vary, the average being 3 to 5 minutes.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
The mitochondria of the myocardium.
A neurotransmitter found at neuromuscular junctions, autonomic ganglia, parasympathetic effector junctions, a subset of sympathetic effector junctions, and at many sites in the central nervous system.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
The relationship between the dose of an administered drug and the response of the organism to the drug.
A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.

Experiment of nitrox saturation diving with trimix excursion. (1/397)

Depth limitations to diving operation with air as the breathing gas are well known: air density, oxygen toxicity, nitrogen narcosis and requirement for decompression. The main objectives of our experiment were to assess the decompression, counterdiffusion and performance aspect of helium-nitrogen-oxygen excursions from nitrox saturation. The experiment was carried out in a wet diving stimulator with "igloo" attached to a 2-lock living chamber. Four subjects of two teams of 2 divers were saturated at 25 msw simulated depth in a nitrogen oxygen chamber environment for 8 days, during which period they performed 32 divers-excursions to 60 or 80 msw pressure. Excursion gas mix was trimix of 14.6% oxygen, 50% helium and 35.4% nitrogen, which gave a bottom oxygen partial pressure of 1.0 bars at 60 msw and 1.3 at 80 msw. Excursions were for 70 min at 60 msw with three 10-min work periods and 40 min at 80 msw with two 10-min work periods. Work was on a bicycle ergometer at a moderate level. We calculated the excursion decompression with M-Values based on methods of Hamilton (Hamilton et al., 1990). Staged decompression took 70 min for the 60 msw excursion and 98 min for 80 msw, with stops beginning at 34 or 43 msw respectively. After the second dive day bubbles were heard mainly in one diver but in three divers overall, to Spencer Grade III some times. No symptoms were reported. Saturation decompression using the Repex procedures began at 40 msw and was uneventful: Grade II and sometimes III bubbles persisted in 2 of the four divers until 24 hr after surfacing. We conclude that excursions with mixture rich in helium can be performed effectively to as deep as 80 msw using these procedures.  (+info)

Comparison of two new methods for the measurement of lung volumes with two standard methods. (2/397)

BACKGROUND: The two most commonly used methods for the measurement of lung volumes are helium dilution and body plethysmography. Two methods have been developed which are both easier and less time consuming to perform. Mathematical modelling uses complex calculations from the flow-volume loop to derive total lung capacity (TLC), and the nitrogen balance technique uses nitrogen from the atmosphere to calculate lung volume in a similar way to helium dilution. This study was designed to compare the two new methods with the two standard methods. METHODS: Sixty one subjects were studied, 23 with normal lung function, 17 with restrictive airway disease, and 21 with obstructive ventilatory defects. Each subject underwent repeated measurements of TLC by each of the four methods in random order. Reproducible values were obtained for each method according to BTS/ARTP guidelines. Bland-Altman plots were constructed for comparisons between the methods and paired t tests were used to assess differences in means. RESULTS: Bland-Altman plots showed that the differences between body plethysmography and helium dilution fell into clinically acceptable ranges (agreement limits +/-0.9 l). The agreement between mathematical modelling or the nitrogen balance technique and helium dilution or body plethysmography was poor (+/-1.8-3.4 l), especially for subjects with airflow obstruction. CONCLUSIONS: Neither of the new methods agrees sufficiently with standard methods to be useful in a clinical setting.  (+info)

Influence of gas density on simulated snoring. (3/397)

According to a recent theoretical model, snoring is related to instability of the upper airway (UA). Factors promoting UA instability include increased gas density. The aim of this study was to test the influence of gas density on simulated snoring production and supraglottic resistance. Supraglottic pressure and flow rate (V') were measured in 10 healthy seated subjects during simulated snoring. Subjects breathed three different gas mixtures: Helium-oxygen, He 79%-O2 21% (He-O2); air; and sulphur hexafluoride-oxygen, F6S 79%-O2 21% (F6S-O2) administered in a random order. Supraglottic resistance (Rsg) was measured on its linear range during quiet breathing and V' was measured at the onset and middle of snoring. Linear Rsg increased and V' conversely decreased with gas density. These data are in agreement with predictions of a mathematical model of the upper airway showing that snoring occurs at lower flow rates when gas density is increased.  (+info)

Helium and sulfur hexafluoride bolus washin in short-term microgravity. (4/397)

We performed single-breath washout (SBW) tests in which He and sulfur hexafluoride (SF6) were inspired throughout the vital capacity inspirations or were inhaled as discrete boluses at different points in the inspiration. Tests were performed in normal gravity (1 G) and in up to 27 s of microgravity (microG) during parabolic flight. The phase III slope of the SBW could be accurately reconstructed from individual bolus tests when allowance for airways closure was made. Bolus tests showed that most of the SBW phase III slope results from events during inspiration at lung volumes below closing capacity and near total lung capacity, as does the SF6-He phase III slope difference. Similarly, the difference between 1 G and microG in phase III slopes for both gases was entirely accounted for by gravity-dependent events at high and low lung volumes. Phase IV height was always larger for SF6 than for He, suggesting at least some airway closure in close proximity to airways that remain open at residual volume. These results help explain previous studies in microG, which show large changes in gas mixing in vital capacity maneuvers but only small effects in tidal volume breaths.  (+info)

Intrapulmonary gas mixing and the sloping alveolar plateau in COPD patients with macroscopic emphysema. (5/397)

Chronic obstructive pulmonary disease patients, especially those with emphysema, show steep slopes of the alveolar plateau (S). This study tested the hypothesis that continued gas exchange between poorly and well-ventilated lung units by means of collateral ventilation would contribute to S in these patients. Nine young volunteers, nine older volunteers and 11 patients with macroscopic emphysema performed wash-out tests with helium (He) and sulphur hexafluoride (SF6). S was determined for breaths 1-5 (range 1), and for breaths between 95% and 98% of complete wash-out (range 2). An unequal ventilation index (UVI) was defined as the ratio between the estimated mean alveolar pressure and the end tidal pressure (PET) of each tracer gas, calculated over range 2. Over the same range, a phase III ratio was calculated by dividing PET by the estimated pressure at Fowler dead space. In all groups of subjects, the S for He and SF6 were greater for range 2 than for range 1 (p< or =0.012). In the emphysema patients, the correlations between S and UVI were 0.72 for He (p=0.012) and 0.81 for SF6 (p=0.002), while the mean phase III ratios were 1.7 for He and 2.4 for SF6, much less than their theoretical maxima. It was concluded that in patients collateral ventilation may account for only a small part of the increase in the alveolar plateau slope between ranges 1 and 2, and that this increase was mainly caused by unequal ventilation in combination with sequential emptying of lung units. The degree of sequential emptying, however, was modest compared with its full potential.  (+info)

Single-shot diffusion measurement in laser-polarized Gas. (6/397)

A single-shot pulsed gradient stimulated echo sequence is introduced to address the challenges of diffusion measurements of laser polarized 3He and 129Xe gas. Laser polarization enhances the NMR sensitivity of these noble gases by >10(3), but creates an unstable, nonthermal polarization that is not readily renewable. A new method is presented which permits parallel acquisition of the several measurements required to determine a diffusive attenuation curve. The NMR characterization of a sample's diffusion behavior can be accomplished in a single measurement, using only a single polarization step. As a demonstration, the diffusion coefficient of a sample of laser-polarized 129Xe gas is measured via this method.  (+info)

Hyperbaric bradycardia and hypoventilation in exercising men: effects of ambient pressure and breathing gas. (7/397)

We sought to determine whether hydrostatic pressure contributed to bradycardia and hypoventilation in hyperbaria. Eight men were studied during exercise at 50, 150, and 250 W while breathing 1) air at 1 bar, 2) helium-oxygen (He-O(2)) at 5.5 bar, 3) sulfur hexafluoride-oxygen (SF(6)-O(2)) at 1.3 bar, and 4) nitrogen-oxygen (N(2)-O(2)) at 5.5 bar. Gas densities were pairwise identical in 1) and 2), and 3) and 4), respectively. Increased hydrostatic pressure to 5.5 bar resulted in a modest but significant relative bradycardia on the order of 6 beats/min, in both the absence [1) vs. 2), P = 0. 0015] and presence [3) vs. 4), P = 0.029] of gases that are both denser than normal and mildly narcotic. In contrast, ventilatory responses appeared not to be influenced by hydrostatic pressure. Also, the combined exposure to increased gas density and mild-to-moderate inert gas narcosis at a given hydrostatic pressure [1) vs. 3), 2) vs. 4)] caused bradycardia (P = 0.032 and 0.061, respectively) of similar magnitude as 5.5-bar hydrostatic pressure. At the same time there was relative hypoventilation at the two higher workloads. We conclude that heart rate control, but not ventilatory control, is sensitive to relatively small increases in hydrostatic pressure.  (+info)

A model of extravascular bubble evolution: effect of changes in breathing gas composition. (8/397)

Observations of bubble evolution in rats after decompression from air dives (O. Hyldegaard and J. Madsen. Undersea Biomed. Res. 16: 185-193, 1989; O. Hyldegaard and J. Madsen. Undersea Hyperbaric Med. 21: 413-424, 1994; O. Hyldegaard, M. Moller, and J. Madsen. Undersea Biomed. Res. 18: 361-371, 1991) suggest that bubbles may resolve more safely when the breathing gas is a heliox mixture than when it is pure O(2). This is due to a transient period of bubble growth seen during switches to O(2) breathing. In an attempt to understand these experimental results, we have developed a multigas-multipressure mathematical model of bubble evolution, which consists of a bubble in a well-stirred liquid. The liquid exchanges gas with the bubble via diffusion, and the exchange between liquid and blood is described by a single-exponential time constant for each inert gas. The model indicates that bubbles resolve most rapidly in spinal tissue, in adipose tissue, and in aqueous tissues when the breathing gas is switched to O(2) after surfacing. In addition, the model suggests that switching to heliox breathing may prolong the existence of the bubble relative to breathing air for bubbles in spinal and adipose tissues. Some possible explanations for the discrepancy between model and experiment are discussed.  (+info)

Linde Healthcare offers medical helium/oxygen mixtures, for example, used in the alleviation of many medical conditions that involve a decrease in airway diameter.
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Helium-4 (also written 4He) is an isotope of helium. It is the most common isotope of helium in the universe. Out of all the helium on the Earth, 99.99986% are helium-4. The nucleus (the center) of a helium-4 atom is also known as the alpha particle. Helium-4 is made of 2 protons (the part of an atomic nucleus with a positive charge), 2 neutrons (the part of an atomic nucleus with a negative charge) and 2 electrons (the part of an atom that goes around the nucleus with a negative charge).. Many helium-4 on Earth is produced from alpha decay of heavy elements. In the Sun and the whole universe, most helium-4 is made during the Big Bang, the event that created the universe. This Big Bang helium-4 is known as the primordial helium. Helium-4 is also made in nuclear fusion at the center of stars. Primordial helium is not much on Earth, because most of it had escaped from the Earth when it was created and the temperatures were very high. Helium-4 on Earth was made through radioactive decay (when ...
TY - JOUR. T1 - Use of a helium-oxygen mixture in the treatment of postextubation stridor in pediatric patients with burns. AU - Rodeberg, D. A.. AU - Easter, A. J.. AU - Washam, M. A.. AU - Housinger, T. A.. AU - Greenhalgh, David G. AU - Warden, G. D.. PY - 1995. Y1 - 1995. N2 - A mixture of helium and oxygen is less dense than room air. This property allows the gas to flow with less turbulence past airway narrowings, thereby decreasing airway resistance and increasing the volume of gas exchange. Previous studies demonstrated that airway obstruction that is manifested by stridor was present in 92% of patients requiring reintubation. Eight pediatric patients with burns in whom postextubation stridor or retractions unresponsive to racemic epinephrine developed, were treated with heliox (helium and oxygen) for 28 ± 5 hours with an initial helium concentration between 50% and 70%. Of the eight patients treated with heliox, only two experienced respiratory distress and required reintubation. ...
So, how do you trap a helium-8 isotope? The answer is far from simple, but Argonne physicist Peter Mueller has found a solution. Using the GANIL cyclotron facility in northern France, helium-4, 6, and occasionally helium-8 isotopes can be generated. This is one of the only cyclotrons is the world with enough energy to generate the helium-8 isotope. It is all very well creating the particle, but to separate helium-8 from its other helium isotope siblings requires a clever and highly accurate laser prison for the heavier helium isotope to fall in to, whilst allowing the other, lighter, isotopes to fly straight through.. Acting as the bars of prison gates, six lasers are accurately aligned at such spacing that only isotopes with the dimensions of helium-8 are trapped. When aligned, helium-8 will fall between them, and should the isotope try to escape, repulsion forces keep the isotope still. Once enough time is allowed to pass (about one helium-8 atom is generated every two minutes) the team ...
Helium Gas For Sale in Malaysia. 22Litres of Helium Gas for Balloons available for shipping to whole Malaysia. Comes in a convenient Portable Helium Gas Tank used to fill balloons
Helium Gas For Sale in Malaysia. 22Litres of Helium Gas for Balloons available for shipping to whole Malaysia. Comes in a convenient Portable Helium Gas Tank used to fill balloons
helium gas product listings on SeekPart.com - Choose quality helium gas products from large database of helium gas manufacturers and suppliers at SeekPart.com.
The helium ion microscope is offering new windows into nano-scale imaging. Unique sample interaction dynamics allow new types of sample information to be gathered. Some fundamental advantages conferred by probing a surface with a helium ion beam are the high contrast due to the sensitive material dependence of the secondary electron (SE) yield, the surface sensitivity arising from the low energy of the SEs, and the ability to image low atomic weight materials due to a greater electronic cross-section of ions. The low mass of helium allows imaging via the collection of backscattered ions. There are also secondary benefits to helium ion microscopy. Ions beams allow easy imaging of non-conducting samples through the use of charge neutralization. The Orion™ tool is equipped with a low energy flood gun for this purpose and has been demonstrated effective even at high image magnification. The low mass of the helium ion minimizes beam induced damage - indeed on some materials sputtering is not detected even
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The study evaluated seven intensive care unit (ICU) ventilators (Veolar FT, Galileo, Evita 2, Evita 4, Servo 900C, Servo 300, Nellcor Puritan Bennett 7200 Series) with helium-oxygen (HeO2), using a lung model, to develop correction factors for the sa
A new imaging technology based on a scanning helium ion beam has been realized. This technology has several advantages over the traditional SEM. Due to the very high source brightness, and the shorter wavelength of the helium ions, it is possible to focus the ion beam to a smaller probe size relative to a SEM. Also, as the ion beam interacts with the sample, it does not suffer from a large excitation volume, and hence provides sharp images on a wide range of materials. Compared to a SEM, the secondary electron yield is quite high - allowing for imaging with currents as low as 1 femtoamp. The detectors provide information-rich images which offer topographic, material, crystallographic, and electrical properties of the sample. In contrast to other ion beams, there is no discernable sample damage due to relatively light mass of the helium ion. Sample images will be presented.
Polarean Imaging Ltd. is manufacturer and service provider for noble gas polarizer devices and ancillary instruments with special focus on pulmonary imaging using hyperpolarized gas MRI. Current product offerings of Polarean Imaging Ltd. include xenon-129 and helium-3 polarizers, polarization measurement stations and upgrade kits for existing polarizers
In order to use your balloons, you will need to inflate them. One option is to air-fill them, but if you want balloons to float then you will need one of our helium canisters.. As well as providing a unique floating display, our helium canisters will save you inflation time - meaning they are both cost and time effective.. We offer a range of rental helium gas cylinders, which are larger and suitable for more regular use, as well as the sale of smaller disposable helium gas cylinders, safe and easy to handle and transport for small displays and events. ...
Disposable Helium Gas Cylinder with 30 Assorted Balloons and Curling Ribbon. Capacity: Each Cylinder 0.25 Cubic metres The small disposable helium gas tank will inflate 30 of 9 Inch latex balloons, 15 of 11 Inch latex balloons or 12 of 18 Inch Foil Balloons This pack does not contain any heli-valves Please note we can ship helium cylinders to Northern Ireland, only on a 2 working day shipping option. For best results, fill the Balloons 1-2 hours before your event. Average float time will vary depending upon the size and type of balloons. Please Note: Curling Ribbon Colour may not match the Colour shade of the Balloons provided.
4th Birthday Gold Balloons and helium gas package Package Contains: -Gold Number 4 Foil Balloon - 34 Inch (86cm) -1 Large Helium Gas Cylinder. -20 of 12 Inc
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[106 Pages Report] Check for Discount on United States Helium Gas Market Report 2017 report by QYResearch Group. In this report, the United States Helium Gas market is...
As of 24/03/2009 this record has been updated; all changes can be found in the relevant fields under the above update date. Please also note that the anticipated start and end date have also been updated; the initial information at the time of registration were ...
Helium gas is a colourless, odourless, tasteless, non-toxic gas. It is relatively rare in our atmosphere equating to approximatley 5 ppm by volume. Helium is formed by the radioactive decay of heavy elements such as thorium and uranium. This radiogenic helium is trapped with natural gas deposits and can be concentrated up to 7% by volume. Commercial extraction involves the use of semi-permeable membranes and low-temperature fractional distillation. Helium is transported in a liquid form at temperatures of -269 degrees Celcius.. Helium is mainly used in its liquid form (cryogenics) for the cooling of superconducting magnets found in medical scanning instruments.. Inhaling helium can be dangerous, helium displaces oxygen needed for normal respiration and should not be attempted by any person. ...
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GC Application #22646: EPA 8082 Aroclor 1016 by GC/ECD on ZB-CLPesticides-2 (Helium Gas). Column used: Zebron ZB-CLPesticides-2 Column 30m x 0.32mm x 0.25um , Ea Part#: 7HM-G029-11
  A new research document with title Global Helium Gas Industry In-Depth Investigation and Analysis Report 2017  covering detailed analysis, Competitive landscape, forecast and...
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The Advanced Technology Purifier (ATP) can purify up to 30 liters of helium gas per minute. At this pace, it is the system of choice for providing clean ...
HHe3 magnetic resonance provides a new technique for imaging the distribution of inhaled air in the lungs. The technique is suitable for following responses to treatment of asthma and changes after methacholine or exercise challenge.
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Ultra high purity gases usually cost more than gases of lower purities due to the process involved in making the gases. One such method of purification uses filters of decreasing pore size to remove larger particles as the gas enters, and smaller particles as the gas continues through, such that enough impurities are removed from the gas to achieve Ultra High Purity.. Speciality Gases provides certified ultra pure gases i.e. Nitrogen, Argon, Helium, Zero Air, Hydrogen to be used as carrier gas in Gas Chromatographs (GCs) and other analytical instruments.. Our ultra pure gases have stringent high-purity specifications. We achieve consistent high-purity through extensive gas cylinder preparation, dedication of gas cylinders for gas service and quality control at every step.. By using our High purity Gases you will optimize cost and quality of analytical results, regardless of application and significantly extend the life of GC columns, detectors and instruments.. ...
The evolution of radiation damage from the bubble formation stage to the surface blistering or exfoliation stage or both in 316 stainless steel irradiated with 80-keV helium ions was observed dynamically in high-voltage electron microscope. Exfoliation, which occurred at temperatures ≤570°C, in the electron transparent regions was observed to differ from bulk exfoliation in that it usually occurred in roughly circular patches. The diameter of these patches increased with increasing specimen thickness. More bulklike sheet exfoliations occurred in the thicker regions. The process started in the thicker regions and proceeded to the thinner regions. All exfoliation occurred on the beam-entrance side. Specimens irradiated at 650°C exhibited surface damage primarily consisting of blisters. The damage varied significantly with specimen thickness. In the thinnest regions, entire grains were bent so that the grain surface was concave on the beam-entrance side and convex on the beam-exit side. In ...
The novel technique, called helium ion microscopy (HIM), was used to image hard-to-see interaction between bacteria and viruses infecting bacteria, or so called bacteriophages. These phages are currently actively considered as a novel smart weapon against bacterial infections, which are becoming more and more difficult to treat with traditional antibiotics. The images demonstrated in clear images the different stages of how the phages in question attacked the bacteria (E. coli), for example showing the process where the virus has latched onto the bacterial surface, grabbing it with a tentacle like structure, and being in the process of injecting its genome into the bacterial cell ...
Carl Zeiss ORION Plus Helium Ion Microscope moves beyond sub-nanometer imaging to advance the fabrication of nano-electronic and nano-photonic devices.
Polarean Imaging Ltd. is manufacturer and service provider for noble gas polarizer devices and ancillary instruments with special focus on pulmonary imaging using hyperpolarized gas MRI. Current product offerings of Polarean Imaging Ltd. include xenon-129 and helium-3 polarizers, polarization measurement stations and upgrade kits for existing polarizers
In the present work two nuclei have been investigated by the elastic scattering of charged particles of spin 1/2 from spin 0 nuclei. In the first experiment protons were scattered from He4 yielding information on the compound nucleus Li5. A phase shift analysis of the angular distributions has been done. The results of experiments from 1 to 18 mev of proton bombarding energy have been collected, and the resulting phase shifts have been interpreted in the light of the dispersion theory. In the second experiment He3 nuclei were scattered from He 4 giving information about the compound nucleus Be7. The second excited state of Be7 has been investigated, and the level parameters have been determined. The non-resonant phase shifts show a somewhat anomalous behaviour in the energy range investigated, and these phase shifts have been qualitatively interpreted in terms of other levels in Be7. The phase shift analysis of these experiments has been done on an IBM 650 computer, and as a by-product of the ...
Helium-3 occurs as a primordial nuclide, escaping from the Earths crust into the atmosphere and into outer space over millions of years. Helium-3 is also thought to be a natural nucleogenic and cosmogenic nuclide, one produced when lithium is bombarded by natural neutrons. Those are released by spontaneous fission and by nuclear reactions with cosmic rays. Some of the helium-3 found in the terrestrial atmosphere is also a relic of atmospheric and underwater nuclear weapons testing, conducted by the three big nuclear powers before 1963. Most of this comes from the decay of tritium (hydrogen-3), which decays into helium-3 with a half life of about 12.3 years. Furthermore, some nuclear reactors (landbound or shipbound) periodically release some helium-3 and tritium into the atmosphere, especially whenever something goes wrong. The nuclear reactor disaster at Chernobyl released a huge amount of radioactive tritium into the atmosphere, and smaller problems cause smaller releases. Furthermore, ...
The spectroscopic measurement of helium ion velocity distribution functions in a low temperature plasma is problematic for a number of reasons. First and foremost is the difficulty in accessing the UV and soft x-ray transitions to the ground state. Conventional laser induced fluorescence on ions in plasmas is routinely performed in argon, neon, xenon, and barium. Two-photon absorption laser induced fluorescence (TALIF) on neutrals has been demonstrated in hydrogen, nitrogen, and oxygen plasmas. We have successfully performed LIF on helium atoms and have had some hints of success with laser absorption spectroscopy on excited states of helium ions, the n $=$ 5 to n $=$ 6 transition in the infrared (1012 nm). Here we report a new approach using TALIF to access the n $=$ 2 to n $=$ 6 transition of singly ionized helium. The fluorescence path at 656 nm completes the three-level sequence. To obtain the electron temperatures necessary to create a sufficient population of metastable helium ions trapped ...
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TriMix Laboratories has entered into an agreement with American Pharmacy Solutions as the exclusive pharmacy for prescription fulfillment of TriMix gel. TriMix gel has been prescribed by doctors as a first line and secondary treatment for erectile dysfunction (ED). American Pharmacy Solutions (APS) is a licensed compounding pharmacy which makes TriMix gel medicine for each individual patient in response to a prescription from a physician. TriMix gel is a gel-based treatment which has been prescribed for ED patients who have failed on Viagra, Levitra and Cialis type tablets or who could not tolerate the side effects. It uses an all-in-one ED gel application system which stores, mixes and applies the medicine at time of use. Steve Berklow, APS owner and president, said: Our 50 years of experience in the pharmacy industry leaves us uniquely qualified to enter into this relationship with TriMix Laboratories. We look forward to delivering top shelf quality service and medicine to our ...
Air spirometry and helium and oxygen (He-O2) spirometry techniques were compared. He-O2 spirometry was used to detect early occupational lung disease by studying functional impairments in the small airways in flax workers and coal miners. In flax workers, air and He-O2 flow volume curves showed decreased flow rates in a high dust exposure group after a work shift. No change was noted in controls.
Summary A measurement of the 2S-2P transition frequencies (Lamb shift) in the muonic helium-3 and 4 ions by means of laser spectroscopy is proposed. This will lead to a ten times more accurate determination of the root-mean-square (rms) charge radii of the He-3 and He-4 nuclei. The radius of the magnetic moment distribution inside the He-3 nucleus will result from the hyperfine structure in muonic 3He. In the muonic helium ion, a single negative muon orbits the helium nucleus. The muon is a point-like lepton, just as the electron, except it is about 200 times heavier. This gives a factor of 200^3 = 10^7 enhancement of nuclear finite size effects on the energy levels of muonic vs. regular (electonic) Helium ions. Muonic helium is the ideal sytem to study the He nuclear size. The CREMA project has four main aims: (1) Solve the proton size puzzle created by our recently completed muonic hydrogen project [R. Pohl et al., The size of the proton, Nature 466, 213 (2010)]. Our tenfold ...
DIN, GHIAS UD. THE STUDY OF (HELIUM-3,NEUTRON) REACTIONS. (1964) Diss., Rice University. https://hdl.handle.net/1911/14157 ...
Most of the other cards that use power counters have been discussed in @tiggys review below; however there are a few notable additions to the power counter suite that allow for interesting new interactions with Helium-3.. Estelle Moon will probably have no lack of power counters on her already, especially in a asset-heavy deck. Two extra power counters on her counts towards two more cards and 4 extra when you cash her in.. Free Lunch will probably not be seeing play in your Weyland deck, unless youre playing some kind of porous successful-run based murder play. But it is also a card that is likely to see power counters, unlike Data Raven and its cousins. Two extra power counters on it counts towards the Runner losing 1, 2, or 3 at any point, maybe even at a critical juncture. (jank: right before a psi game?). Chief Slee has been mentioned already, as two power counters go a long way towards making those critical five. Two extra power counters on her counts towards... death???? (its ...
A one-dimensional numerical simulation of a homogeneous dielectric barrier discharge has been carried out for a nonequilibrium helium-oxygen mixture plasma
2004. de Lange E.E., Altes T.A., Patrie J., Gaare J., Brookeman J.R., Mugler J.P. III. Hyperpolarized Helium-3 MR Imaging of the lung in asthmatics: Evaluation of changes following methacholine and exercise challenge. Radiological Society of North America,Chicago, IL, 2004.. Gaare J., Altes T.A., Knake J.J., Brookeman J.R., Mugler J.P. III, de Lange E.E. Hyperpolarized Helium-3 MR (H3-HeMR) Imaging of the lung in asthmatics: Ventilation changes following treatment with albuterol. Radiological Society of North America, Chicago, IL, 2004.. Altes T.A ., Zhang H., Salerno M., Brookeman J.R., de Lange E.E., Mugler J.P. III. Repeatability of the Hyperpolarized Helium-3 Apparent Diffusion Coefficient. Radiological Society of North America, Chicago, IL, 2004.. Altes T.A ., Mugler J.P. III, Mata J., Benjamin-Watkins J., Herily S., de Lange E.E., Brookeman J.R. Assessment of lung development using hyperpolarized helium-3 MR lung imaging. International Society of Magnetic Resonance Medicine [ISMRM] , ...
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Looking for Helium on the moon? Find out information about Helium on the moon. The isotope of helium with mass number 3, constituting approximately 1.3 parts per million of naturally occurring helium Explanation of Helium on the moon
TY - JOUR. T1 - Low-energy helium-neon laser irradiation increases the motility of cultured human keratinocytes. AU - Haas, Ann F.. AU - Isseroff, Roslyn Rivkah. AU - Wheeland, Ronald G.. AU - Rood, Pamela A.. AU - Graves, Phillip J.. PY - 1990/6. Y1 - 1990/6. N2 - Helium-neon (HeNe) laser irradiation is known to stimulate wound healing. We investigated whether the biostimulatory effects of HeNe irradiation result from enhancement of keratinocyte proliferation or motility. HeNe effects on keratinocyte motility were evaluated by irradiating a wounded culture with 0.8 J/cm2 3 times over a 20-h period. At 20 h post-irradiation, videocinemicroscopy and sequential quantitative measurements of the leading edge were taken over a 6-h period. There was a significant difference in migration of the leading edge in irradiated wounds compared to non-irradiated wounded controls (12.0 μm/h vs 4.0 μm/h, p , 0.0001). To determine if the increase in migration observed in irradiated cultures resulted from ...
For example, a Helium/Oxygen mix would quickly become 100% Oxygen on the ground no matter what planet you were on. This is not to mention a Xenon/Oxygen mixture would knock you out nearly instantly, much like Nitrous Oxide does and breathing Argon/Oxygen mixtures is considered doping by the Olympic committee. On atmospheric scales these gases could possibly separate into layers with no O2 at sea level since Argon is about 25% times heavier. However, CO2 still mixes well in our own atmosphere even though it is about 50% heavier than the Nitrogen/Oxygen mixture which makes up the majority of our air. Nitrogen and Oxygen are very close in weight so they mix well. As you well know, plants still thrive in the mountains until it gets too cold. Water Vapor behaves differently in all these different mixes too. In gases that it can diffuse quickly in, like Helium, you would probably never develop clouds on that planet. However, I wont take any of this into account and I will leave elevation at zero in ...
Open access preprint on Helium Ion Microscopy with Secondary Ion Mass Spectrometry (HIM-SIMS) for the analysis and quantitation of polyolefins
Lung ventilation was mapped in seven healthy male Sprague-Dawley rats (433 ± 24 g) using hyperpolarized 129Xe magnetic resonance imaging (MRI) at 3.0 T, and validated with hyperpolarized 3He MRI under similar ventilator conditions. Ventilation maps were obtained using flip angle variation for offset of RF and relaxation (FAVOR) which is a multiple breath imaging technique that extracts the fractional ventilation parameter, r, on a pixel-by-pixel basis from the dynamic signal enhancement. r is defined as the fractional refreshment of gas per breath. Under the ventilator conditions used in this work, whole-lung measurements of fractional ventilation obtained using hyperpolarized 129Xe were not significantly different from those obtained using hyperpolarized 3He (p = 0.8125 by a Wilcoxon matched pairs test). Fractional ventilation gradients calculated in the superior/inferior (S/I) and anterior/posterior (A/P) directions obtained using hyperpolarized 129Xe were not significantly different from ...
The Biotechnology High Performance Computing Software Applications Institute (BHSAI) of the Department of Defense (DoD) is studying airflow in the lungs using computational fluid dynamics in order to characterize disease-specific airflow patterns and provide useful information for medical applications. To validate these models, they are seeking to obtain experimental data of airflow in human lungs, both healthy and diseased. An assessment of airflow can be obtained by using hyperpolarized noble gas (HNG) magnetic resonance imaging (MRI) or, more specifically, hyperpolarized helium-3 (HHe) MRI in conjunction with flow-encoding schemes that are well-established in conventional proton MRI. Four chronic obstructive pulmonary disease (COPD) patients and four healthy subjects will undergo pulmonary function tests (PFTs), computed tomography (CT) scan covering the mouth, neck, and chest, and hyperpolarized helium 3 MRI. Before and after the MRI scans, three spirometry readings will be taken while the ...
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6. India. This Report conjointly offered for all the Countries within the world. The study world Helium-neon Laser Film trade analysis Report 2017 is also an elaborate report scrutinising applied mathematics data regarding the worldwide market. Moreover, the factors on it the businesses contend among the market area unit evaluated among the report.. Inquiry To Buy Report: http://www.marketresearchstore.com/report/global-helium-neon-laser-film-market-by-manufacturers-regions-96831#InquiryForBuying. The report offers AN comprehensive define of the key segments at intervals the market. Analysis to boot covers upstream raw materials, equipment, downstream shopper survey, commercialism channels, trade development trend and proposals.. The Helium-neon Laser Film report offers a detailed outline of the key segments among the market. The fastest & slowest growing market segments are lined throughout this report.This analysis report covers the growth prospects of the worldwide market supported end-users. ...
Cardiac monitoring is recommended, gastrointestinal symptoms are not at higher risk for developing essential ht . The age and puberty, seborrheic dermatitis than in online mg cialis 50 adults. Functional connectivity and pain accessed february, lord sm, barnsley l, wallis bj, et al comparison of helium-oxygen mixture that has been retained on the efficacy of this signal to that of pain and will create a sense of sponginess in the chila_chap.Indd figure - measurement of taillard figb can detect chemicals in the. Place two fingers along the foreign body removal complications complications from malrotation present beyond year of age who have a significant portion of foot drop is therefore a limitation of plantar fasciitis. The eyes should be referred to as cysts. A particular phase of atopic dermatitis. Paul kimberly was the staple for medical care survey emergency department is confusing because it actively encourages patients to follow hospital policy is that because of the nasal bones opens the ...
inproceedings{2101216, author = {Schauvliege, Stijn and Savvas, I and Gasthuys, Frank}, booktitle = {AVA spring meeting Davos 2012}, language = {eng}, location = {Davos, Switzerland}, pages = {34--34}, publisher = {Association of Veterinary Anaesthetists (AVA)}, title = {The effect of pure oxygen or air/oxygen mixture on arterial blood oxygenation in spontaneously ventilated isoflurane anaesthetized horses: a retrospective study}, year = {2012 ...
TY - JOUR. T1 - Estimated Solar Wind-Implanted Helium-3 Distribution on the Moon. AU - Johnson, Jeffrey R.. AU - Swindle, Timothy D.. AU - Lucey, Paul G.. PY - 1999/2/1. Y1 - 1999/2/1. N2 - Among the solar wind-implanted volatiles present in the lunar regolith, 3He is possibly the most valuable resource because of its potential as a fusion fuel. The abundance of 3He in the lunar regolith at a given location depends on surface maturity, the amount of solar wind fluence, and titanium content, because ilmenite (FeTiO3) retains helium much better than other major lunar minerals. Surface maturity and TiO2 maps from Clementine multispectral data sets are combined here with a solar wind fluence model to produce a 3He abundance map of the Moon. Comparison of the predicted 3He values to landing site observations shows good correlation. The highest 3He abundances occur in the farside maria (due to greater solar wind fluence received) and in higher TiO2 nearside mare regions.. AB - Among the solar ...
Environmental Aspects of Lunar Helium-3 Mining. Three potential detrimental effects of lunar 3He mining have been identified; visual changes, atmospheric contamination, and solid waste disposal. The removal of small craters (
This is an OSU Astronomy Coffee Brief for the van Saders & Pinsonneault (2012) paper titled A He3 Driven Instability Near the Fully Convective Boundary posted on the astro-ph archive on January 26, 2012. For more details, see the paper at: arxiv.org Movie made by Jennifer van Saders (OSU Astronomy).. Tags: abundance, astronomy, brief, cataclysmic, Chemical, coffee, convection, helium-3, instability, low, mass, OSU, stars, stellar, variables. ...
I have been reading the last couple of years that there is a new moon race to establish permanent bases on the moon to mine the satellite for Helium-3 as...
We tested the hypothesis that heliox breathing, by reducing lung dynamic hyperinflation (DH) and dyspnea (Dys) sensation, may significantly improve exercise endurance capacity in patients with chronic obstructive pulmonary disease [n = 12, forced expiratory volume in 1 s = 1.15 (SD 0.32) liters]. Each subject underwent two cycle ergometer high-intensity constant work rate exercises to exhaustion, one on room air and one on heliox (79% He-21% O2). Minute ventilation (VE), carbon dioxide output, heart rate, inspiratory capacity (IC), Dys, and arterial partial pressure of CO2 were measured. Exercise endurance time increased significantly with heliox [9.0 (SD 4.5) vs. 4.2 (SD 2.0) min; P , 0.001]. This was associated with a significant reduction in lung DH at isotime (Iso), as reflected by the increase in IC [1.97 (SD 0.40) vs. 1.77 (SD 0.41) liters; P , 0.001] and a decrease in Dys [6 (SD 1) vs. 8 (SD 1) score; P , 0.001]. Heliox induced a state of relative hyperventilation, as reflected by the ...
Acoustical amplitude and frequency modulation techniques of a CW helium-neon laser beam are presented. tThe communication possibilities of this beam for both cases (AM and FM) are verified. Theories are discussed for the acoustooptical modulator and the p-i-n silicon photodetector. Designs of the elements of the systems and experimental results are presented. Operation of both systems is discussed. (Author)(*GAS LASERS
To the Editor.-. The study by Martinón-Torres et al1 using heliox therapy in infants with acute bronchiolitis makes me question the diagnosis of bronchiolitis in those infants. It appears from the study that the use of heliox helped to decrease the work of breathing in these infants. It is conceivable that this was achieved by its property of having lower density. It is also known that heliox has higher viscosity, which affects the laminar flow. Laminar flow is the predominant flow in the peripheral airways or bronchioles. Therefore, patients with true bronchiolitis where the inflammation and obstruction is in the peripheral airways will have decreased flow with heliox and increased work of breathing. Because this didnt happen in these infants, one could … ...
Helium is a chemical element; its atomic symbol is He. It is a colorless, odorless, tasteless, non-toxic, and nearly inert monatomic that heads the noble gas series in the periodic table. Its atomic number is 2 and its boiling and melting points are the lowest among the elements. It exists only as a gas except in extreme conditions. Extreme conditions are also needed to create the small handful of helium compounds, which are all unstable at standard temperature and pressure. Its most abundant stable isotope is helium-4 and it has a rare stable isotope, helium-3. The behavior of liquid helium-4s two different states-helium I and helium II-is important to researchers studying quantum mechanics (in particular the phenomenon of superfluidity) and those looking at the effects that near absolute zero temperatures have on matter (such as superconductivity). Helium is the second most abundant element in the known Universe and second lightest element in the periodic table. In the modern Universe almost ...
Aluminum and aluminum alloy melts are purified by removing entrained gaseous impurities and solid particulate impurities, primarily aluminum oxides, by bubbling a non-corrosive intimate mixture of sulfur hexafluoride in an inert gas. Magnesium levels, if present, are not significantly reduced. The process is reliable and the gas mixture safe for aluminum purifying operations and procedures.
Everyone here knows what happens when someone inhales helium right? Since helium is 6 times less dense than air, sounds go through it much faster, making people who inhale it sound like chipmunks. But do you know what happens when sulfur hexafluoride is enhaled?? Watch the following video to find out.. ...
Browse Sulfur Hexafluoride Analyzers (SF6) in the Nova Analytical Systems catalog including Portable Process Sulfur Hexaflouride Gas Analyzer - 337 Series,Portable Methane Leak Detector- 339 Series,Continuous Process Analyzer for Binary Ga
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Helium 3 (also written as Helium-3 and abbreviated as He3 or He-3) is an English record label. Formed by alternative rock band Muse in 2006, Helium 3 is a subdivision of Warner Music Group, one of the Big Three record companies. Beginning with the single Supermassive Black Hole, the label has issued Muse releases since 2006, working internationally with Warner Records, A&E Records and the various regional Warner Music labels. The name of the record label is derived from Helium-3, a rare isotope of the noble gas helium which can theoretically be used in the future for energy production through Nuclear fusion. ...
In prokaryotes, unicellular eukaryotes and cell-free systems, pressure is known to exert an inhibitory effect on protein synthesis and RNA metabolism, the mechanism(s) of which remain to be investigated in detail. The purpose of the present in vitro
Hyperpolarized 129 Xe MRI of the human lung Journal of Magnetic Resonance Imaging , 2013, 37 , 313-331 John P. Mugler III, Talissa A. Altes Abstract By permitting direct visualization of the airspaces of the lung, magnetic resonance imaging MRI using hyperpolarized gases provides unique strategies for evaluating pulmonary structure and function....
The following is an imaginary tale of a young, blond-haired hipster drawn to the Red Sea for a deep dive. He chose to dive on the wall at Ras Mohammed on the Eastern Shore of the Sinai, which descends quickly down to a thousand feet and beyond. That was his target-1,000 feet.. The previous year he bought a rebreather so gas usage should not be a problem for his deep dive. He also sprang for the cost of helium-oxygen diluent. Trimix would have been cheaper, but he spared no expense. Nothing but the best. To that end, he used loose-fill, fine grain Sodalime in his CO2 scrubber canister.. These were his thoughts as he descended.. Free-falling at three hundred feet. Never been this deep before. The waters getting cold, so the warm gas from the canister feels good.. 800 feet. Wow, the gas is thicker now.. When he reached the bottom, he realized something wasnt right. He sucked harder and harder, feeling his full face mask collapsing around his face with each inhalation. He was sucking rubber, ...
Introduction. Helium-oxygen (He/O2) mixtures are known to facilitate breathing due to their low density compared to air, and therefore, may be valuable to treat obstructive lung diseases such as asthma.. Objectives. The objective is to study the effect of air vs. He/O2 on the aerosol deposition of a nebulized radiolabel in stable, moderate asthmatic subjects.. Methods. 16 evaluable male subjects (6 asthmatics, 10 healthy volunteers) were studied. Each subject performed two inhalations which differed by a single controlled parameter (particle size, ventilation, or carrier gas). 2 of the asthmatics inhaled aerosols with either air or He/O2 (78%He/22%O2), and aerosol deposition was imaged with 3D-SPECT.. To characterize the sites of aerosol deposition, the 3D Central to Peripheral ratios, C/P, were calculated for right and left lungs.. Results. The effect of He/O2 on aerosol deposition was very visible for one of the asthmatic subjects (A06) with a large decrease in central deposition (Right ...
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Alan Rickman has quite the deep, recognisable voice, but when he stopped by The Tonight Show on Thursday, he inhaled some helium and sounded nothing like
The reason that they dont appear right next to each other on the periodic table is that H shares properties with the others in the first column, and He shares properties with others in the last column. Unfortunately, H is a kind of weird atom, because even though it only has 1 valence electron, it could easily become a positive ion (losing an electron, like the 1st column) or a negative ion (gaining an electron, like the second to last column) H shares a lot of traits with many different columns on the periodic table, so scientists basically decided to put it in the first column, just for classification purposes. Ive heard it refered to as the floating atom because of this ...
This protocol describes the investigation of the use of hyperpolarised helium magnetic resonance imaging (MRI) in reflecting the regional differences in lung function of moderate to severe Chronic Obstructive Pulmonary Disease (COPD) patients. Since finalisation of the original protocol, new medications for COPD have received Market Authorisation Approvals. Protocol Amendment 02 has been prepared to include these medications in the protocol eligibility criteria and restrictions for the study.
The names of the ingredients for nuclear fusion reactions -- deuterium, tritium, isotopes of helium -- sound complicated, but really these are only variations on substances found in everyday life. Well assume you understand that atoms are made up of protons, neutrons, and electrons. Electrons are the very lightweight, negatively charged bits that buzz around the edges of an atom. Regular chemical reactions work by trading and sharing electons among atoms. For instance, when you burn a piece of paper in air, the chemical reaction involves some carbon atoms in the paper sharing electrons with some oxygen atoms from the air. The reaction forms carbon dioxide gas while the electons give off energy, as heat and light, when they change their orbits. Protons and neutrons make up an atoms nucleus. In this discussion, were concerned with rearranging the nucleus of an atom; hence the term nuclear reaction. Generally, the neutrally charged neutrons keep the positively charged protons from fighting ...
The US Tritium and helium-3 stockpile sizes are classified, because they give a hint as to how many US nuclear weapons are still functional. According to Wikipedia approximately 150 kilograms of it (He3) have resulted from decay of US Tritium production since 1955. One could assume a similar quantity has been accumulated in the ex-USSR, and perhaps additionally from other thermonuclear powers (UK, France, China). Today, the worlds supply of Helium-3 can be counted in hundreds of kilograms, and the value of 100 kg would be $150M. So it may be assumed that the total stockpile value today is roughly about half a billion USD. The US DOE does sell He3 commercially, but how much of the present stockpile has actually been sold on the open market is an open question. Assuming that someone were to start at the level of collecting 100kg of He3 from the Moon and assume its value would be $150M, the cost of soft landing even a small probe on to the lunar surface may easily cost that much or more. How ...
I think if you review the attached article in Post #2, you will see that some of the steps in the CNO cycles occur due to the spontaneous emission of positrons from unstable nuclei produced after fusion with a proton. This process occurs over a period of time (i.e., there is a measurable half-life associated with it), and it fits with the definition of radioactive decay as it is understood in non-stellar processes ...
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The moon has always been a source of myth, and now we have some modern ones. Many people will swear blind, without the slightest justification, that the Apollo missions gave us Teflon and the instant fruit drink Tang. New calls for a moon base are routinely supported now with the claim that we can mine the lunar surface for nuclear-fusion fuel in the form of helium-3, a rare commodity on Earth. BBCs Horizon bought the idea, and its been paraded in front of the US House of Representatives. But as physicist Frank Close pointed out recently, there is no sound basis to it. None of the large fusion projects uses helium-3 at all, and the suggestion that it would be a cleaner fuel simply doesnt work, at least without a total reactor redesign. Thats not even to mention the cost of it all. But no straw is too flimsy that advocates of human spaceflight will fail to grasp it ...
1 Expert Answers - At 100 K and 0.1 atmospheric pressure the volume of helium gas is 10 litres If the volume and press. Answer this question and win exciting prizes
BACKGROUND:. This longitudinal study was initiated in 1975 when a stratified random sample of children, ages 5-9 years and living in the East Boston area of the City of Boston, was selected. Annual lung function tests were performed on the children and their families and questionnaires administered on respiratory illness history, smoking history, disability from cardiac disease, age of menarche in female children and demographic data such as type of heating, type of fuel for cooking, types of air purifying devices, and area of residence. A subset of the cohort had repeated measures of eucapneic hyperventilation with cold air. The cohort was also studied with helium-oxygen protocol. Analysis focused on validation of existing models, including the autoregressive model, for lung growth in children and adolescents and the decline in growth in adults.. DESIGN NARRATIVE:. The longitudinal study was renewed in 1995. The overall aim of this continuing investigation was to evaluate risk factors ...
4Embrapa Suínos e Aves, Concórdia, SC, Brasil. ABSTRACT Fertilized chicken eggs were bombarded with a biolistic device. Transient expression of the lacZ gene under the control of a human cytomegalovirus (CMV) promoter was assessed after in situ gene transfer using this approach. The influence of different pressures, vacuum levels and particles was tested. Survival rate improved as particle velocity decreased, but resulted in lower levels of expression. The best survival and expression were obtained with gold particles, a helium gas pressure of 600 psi and a vacuum of 600 mmHg. Under these conditions, all bombarded embryos showed b-galactosidase activity, indicating that this was an effective method for transformation of chicken embryos. INTRODUCTION DNA transfer methods have led to significant advances in exogenous gene expression. Transgenic animals have been used as models for studying gene functions and for producing very marketable proteins. Microinjection has been the most studied form of ...
Early buyers will receive 10% customization on reports.. Factors such as rising geriatric population; advancements in MRI techniques such as the development of superconducting (SC) magnets, open architecture, ultra-high-field MRI, and software applications; and the advent of MRI-compatible pacemakers are expected to drive the demand for MRI systems among end users in the forecast period. On the other hand, high cost of MRI systems, depleting helium gas deposits, and declining reimbursement rates for MRI procedures are expected to affect the growth of the MRI systems market from 2016 to 2021. However, emerging markets (such as China, India, Brazil, and Middle East), novel application areas such as detection of multiple sclerosis and breast cancer, and advent of hybrid MRI systems provide new growth opportunities to players in the MRI systems market. Furthermore, dearth of skilled labor and complexity of instrumentation may pose challenges for the growth of this market.. The MRI systems market is ...
Manufacturer: Vinci Technologies Model Number: HEP-P The Helium gas expansion porosimeter enables the determination of a samples (1 or 1.5 diameter) grain and pore volume via an isothermal helium expansion and the application of Boyles law and Charles law. Subsequently, porosity and grain density can be calculated. A data acquisition system performs calibration, data logging and parameter calculation. Optionally, a full diameter matrix cup can be provided for porosity studies on whole diameter core samples. Each sample matrix cup is interchangeable and is supplied with stainless steel calibration check plugs. Pore volume can be measured by placing the core sample in an optional Hassler type core holder, connected to the porosimeter.. FEATURES :. Core diameter: 1″ and 1.5″ , (4 optional ...
In what must be a coincidence, two of the nations largest craft brewers posted April Fools videos today in which they purport to unveil beers that get their bubbles from helium gas.. The Boston Beer Co., maker of Samuel Adams, got its CEO, Jim Koch, to pitch HeliYUM. Wait until he takes a sip:. ...
A new approach to gas exploration has discovered a huge helium gas field, which could address the increasingly critical shortage of this vital yet rare element.
"Helium - Pirate Prude - This Day In Matador History". "Helium". Trouser Press. Retrieved 15 October 2020. CS1 maint: ... Helium , Songs, Reviews, Credits , AllMusic" - via www.allmusic.com. "Robert Christgau: CG: helium". www.robertchristgau.com. ... Pirate Prude is the debut EP from American indie rock band Helium. It was released March 8, 1994, on Matador Records. Its ... p. 227.CS1 maint: location (link) "Helium , Biography & History". AllMusic. Amorosi, A. D. "Mary Timony returns to the scene of ...
"A Victory for Common Sense". Helium Records. 13 July 2009. Retrieved 27 July 2016. "Euan McColm: Ed Miliband as prime minister ... Mick (2001) Angel Air SJPCD 234 A Victory for Common Sense (2009) (Helium B002C6K7UI) Do the Stanley (1976, compilation, one ... was released on 13 July 2009 on Helium Records. In June 2010 it was announced that Mutter Slater had resigned from Stackridge. ... 05/07/08 Lummy Days the Stackridge Official Podcast Helium Records Stackridge Glastonbury Festival 1970 and 2008 on YouTube ...
Collins, Maria C (2009-12-27). "Why age is not a barrier to writing". helium.com. Missing or empty ,url= (help) http://www. ...
"02 Helium". Elements.vanderkrogt.net. Retrieved 2008-09-12. "31 Gallium". Elements.vanderkrogt.net. Retrieved 2008-09-12. "The ...
"Special Event: Beth Stelling". Helium Comedy Club. "Beth Stelling and the World of Female-Dominated Standup". Vulture. 2015-10- ...
p.109-111 Black, Michael (July 30, 1999). "Big Helium Dog". IMDB. Retrieved 2010-03-16. Buck, David (October 9, 2020). " ... made several appearances in the film Big Helium Dog, and had a supporting role on the NBC dramedy Ed. His dry, sarcastically ...
Certain gases such as helium can be treated as ideal gases. This is not generally the case for superheated steam and the ideal ... Design is a nested, telescoping piston w A frame... High pressure helium. Needs to be ultra light. Eastop & McConkey (1993). ...
Superfluidity is only observed "naturally" in two liquids: helium-4 and the rarer isotope, helium-3. Quantum turbulence was ... Helium II is usefully regarded theoretically as a mixture of normal fluid and superfluid, having a total density equal to the ... See superfluid helium-4. Since the two-fluid model, and therefore counterflow itself, is unique to superfluids, this ... More details can be found in the articles on superfluid helium-4 and macroscopic quantum phenomena. In turbulence, the normal ...
High pressure cold spraying (HPCS) in which the working gas is nitrogen or helium at pressures above 1.5 MPa, a flow rate of ... Metal (nickel alloys) particles travel in a blend of nitrogen and helium gas and gradually stack up on the damaged part to ... Main influential factors are: Gas type, e.g. air, nitrogen, helium Gas pressure Gas temperature (the maximum temperature in ... high cost of Helium; fouling and erosion of the nozzle. The ability for CS to deposit materials that are phase-sensitive or ...
The symbol 4.1H (Hydrogen-4.1) has been used to describe the exotic atom muonic helium (4He-μ), which is like helium-4 in ... Its chemical behavior is that of a hydrogen atom and not a noble helium atom. The only radioactive part of the atom is the muon ... It is radioactive, decaying into helium-3 through β− decay with a half-life of 12.32 years. Trace amounts of tritium occur ... "The Muonic Helium Atom". Department of Chemistry. News & Events. The University of British Columbia. Retrieved 11 February 2021 ...
Liquid Helium management components. Orbital ATK systems and components. Boeing SLS systems and components. Moog provides ...
Records / Helium-3. 2012.CS1 maint: others in cite AV media (notes) (link) "Muse - The 2nd Law". NME. September 2012. Winder, ...
... where 4He becomes a superfluid known as helium II. Helium II has the highest thermal conductivity of any known material ( ... Second sound is also observed in superfluid helium-3 below its lambda point 2.5 mK. Second sound has been observed in solid 4He ... Lebrun, Phillipe (July 17, 1997). Superfluid helium as a technical coolant (PDF) (LHC-Project-Report-125). CERN. p. 4. Van Der ... At temperatures below 1 K, the speed of second sound in helium II increases as the temperature decreases. ...
"RED Helium 8K DxOMark Sensor Score: 108 - A new all-time-high score! , DxOMark". Retrieved January 13, 2017. Allard, Matthew ( ... In 2016, an 8K sensor called "Helium" was introduced with the two cameras Red Epic-W and Weapon 8K S35. In early January 2017, ... Fauer, Jon (October 11, 2016). "RED 8K HELIUM Super35mm Cameras". Film and Digital Times. Retrieved April 22, 2018. DxO. " ...
Hulpke, E. (1992). Helium Atom Scattering from Surfaces. p. 168. ISBN 9783662027745. Torres, Zuleika Medina (2008). "Selective ...
ISBN 978-90-277-1946-1. Madden, R. P.; Codling, K. (1965). "Two electron states in Helium". Astrophysical Journal. 141: 364. ...
It seems to indicate a new substance, which they propose to call Helium." For the name "helium" see also Jensen, William B. ( ... Oxford English Dictionary (1989), s.v. "helium". Retrieved 16 December 2006, from Oxford English Dictionary Online. Also, from ... Nath, B. B. (2012). The Discovery of Helium and the Birth of Astrophysics. Springer.. ... 2004). "Why Helium Ends in "ium"". Journal of Chemical Education. 81 (7): 944. Bibcode:2004JChEd..81..944J. doi:10.1021/ ...
Helium is extracted by fractional distillation from natural gas, which contains up to 7% helium. The world's largest helium- ... The extracted helium is stored underground in the National Helium Reserve near Amarillo, Texas, the self-proclaimed "Helium ... Helium, which is the second-lightest chemical element, will rise to the upper layers of Earth's atmosphere, where it can ... Kockarts, G. (1973). "Helium in the Terrestrial Atmosphere". Space Science Reviews. 14 (6): 723ff. Bibcode:1973SSRv...14..723K ...
Helium gas is mainly used to fill hot air and party balloons. Balloons filled with it float upwards and this phenomenon is ... Hence, they have been renamed to 'noble gases', as the only two of these we know truly to be inert are helium and neon. However ... Most Group 8 or 18 elements that appear in the last column of the periodic table (Helium, Neon, Argon, Krypton, Xenon and Radon ... Inert atmospheres consisting of gases such as argon, nitrogen, or helium are commonly used in chemical reaction chambers and in ...
Neon and helium, J. Opt. Soc. Am., 1958, 48, 304. Michaelson, R.C.; Smith, A.L., Potential curves from emission continua. IV. ...
... the helium group, composed of the noble gases (excluding helium) and oganesson. Alternatively, the p-block can be described as ... Helium is an s-block element, with its outer (and only) electrons in the 1s atomic orbital, although its chemical properties ... Their general electronic configuration is ns2 np1-6. Helium, though being the first element in group 18, is not included in the ... Chemically, all s-elements except helium are highly reactive. Metals of the s-block are highly electropositive and often form ...
In 2009 a retired teacher who was being investigated for indecent assault killed himself by inhaling helium. Nicholas Bray was ... "Former teacher overdosed on helium". Salisbury Journal. 19 October 2009. Retrieved 1 October 2020. "Alumni Publications - The ...
See gas embolism helium death Saeidi, Mahsa (2015-11-11). "Coroner rules cryochamber death due to lack of oxygen". KTNV. ... A fatal fall from a tree occurred after the inhalation of helium from a toy balloon, which caused the person to become either ... The method of suicide based on self-administration of helium in a bag, a colloquial name being the "exit bag" or suicide bag, ... Originally such bags were used with helium, and 30 deaths were reported with use of them from 2001 to 2005, and another 79 from ...
In February 2011 it was reported that helium atoms, cooled to near absolute zero / Bose-Einstein condensate state, can be made ... Penrose, O.; Onsager, L. (1956). "Bose-Einstein Condensation and Liquid Helium". Phys. Rev. 104 (3): 576-584. Bibcode:1956PhRv ... a stabilized and monomode helium-neon laser can easily produce light with coherence lengths of 300 m. Not all lasers are ...
"The dielectric constant of liquid helium". Physica. 27 (12): 1129-1145. Bibcode:1961Phy....27.1129C. doi:10.1016/0031-8914(61) ...
A Rollin film, named after Bernard V. Rollin, is a 30 nm-thick liquid film of helium in the helium II state. It exhibits a " ... Rollin films are involved in the fountain effect where superfluid helium leaks out of a container in a fountain-like manner. ... Fairbank H.A.; Lane C.T. (October 1949). "Rollin Film Rates in Liquid Helium". Physical Review. 76 (8): 1209-1211. Bibcode: ... Video of the property in action Liquid Helium,Superfluid: demonstrating Lambda point transition/viscosity paradox/two fluid ...
Dieter Vollhardt; Peter Woelfle (1990). The Superfluid Phases Of Helium 3. Taylor & Francis. OCLC 21118676. Egor Babaev, " ...
Scott, Cameron (October 17, 2010). "What is Prorogation?". Helium Inc. Retrieved November 10, 2013. "Thousands protest ...
In 2016, an estimated 1.53 billion cubic meters (54.2 billion standard cubic feet) volume of helium gas was discovered in Lake ... "Helium 'could earn Tanzania $3.5bn'". www.thecitizen.co.tz. July 8, 2016. v t e. ...
The blimps are filled with helium. The helium is maintained under low pressure, so small punctures do not pose serious ... Goodyear has let the helium out of the last of its fabled fleet of blimps, but the company's flight program will continue. ...
Be the first to discover new talent! Each week, our editors select the one author and one book they believe to be most worthy of your attention and highlight them in our Pro Connect email alert. Sign up here to receive your FREE alerts. ...
Digital today announced it will begin shipping new lines of 3.5-in hard disk drives that are hermetically sealed with helium ... Helium-filled WD drives promise huge boost in capacity. Density of helium is one-seventh that of air, thus reducing hard drive ... The helium gas-filled drives will let HGST increase the overall platter count from five to seven. At the same time, the ... The helium-filled drives will be targeted for use in public cloud computing systems and in corporate data centers, he added. ...
Inhaling a small amount of helium makes your voice high-pitched and squeaky; this may seem entertaining, but inhaling helium is ... Helium is a colourless, odourless, non-flammable gas typically used to fill balloons. ... Helium is a colourless, odourless, non-flammable gas typically used to fill balloons. Inhaling a small amount of helium makes ... However, helium inhalation of any form is never safe. Fatalities have occurred from inhaling helium from balloons. ...
The low mass of helium allows imaging via the collection of backscattered ions. There are also secondary benefits to helium ion ... Some fundamental advantages conferred by probing a surface with a helium ion beam are the high contrast due to the sensitive ... The low mass of the helium ion minimizes beam induced damage - indeed on some materials sputtering is not detected even at ... The helium ion microscope is offering new windows into nano-scale imaging. Unique sample interaction dynamics allow new types ...
Helium-4 (also written 4He) is an isotope of helium. It is the most common isotope of helium in the universe. Out of all the ... This "Big Bang helium-4" is known as the "primordial helium". Helium-4 is also made in nuclear fusion at the center of stars. ... are helium-4. The nucleus (the center) of a helium-4 atom is also known as the alpha particle. Helium-4 is made of 2 protons ( ... Many helium-4 on Earth is produced from alpha decay of heavy elements. In the Sun and the whole universe, most helium-4 is made ...
Download this Helium Gas Cylinder And Balloon Isolated On White Background photo now. And search more of the webs best library ... Helium gas cylinder and balloon isolated on white background - Stock image. .... Balloon, Bottle, Celebration Event, Container ...
Air spirometry and helium and oxygen (He-O2) spirometry techniques were compared. He-O2 spirometry was used to detect early ... Air spirometry and helium and oxygen (He-O2) spirometry techniques were compared. He-O2 spirometry was used to detect early ...
Due to the very high source brightness, and the shorter wavelength of the helium ions, it is possible to focus the ion beam to ... In contrast to other ion beams, there is no discernable sample damage due to relatively light mass of the helium ion. Sample ... A new imaging technology based on a scanning helium ion beam has been realized. This technology has several advantages over the ... SEM, Ion Beam, FIB, Contrast, Helium. Abstract:. A new imaging technology based on a scanning helium ion beam has been realized ...
Antiprotonic helium is a three-body atom composed of an antiproton and an electron orbiting around a helium nucleus. It is thus ... An antiprotonic helium ion is a two-body object composed of a helium nucleus and orbiting antiproton. It has an electric charge ... Antiprotonic helium atoms are under study by the ASACUSA experiment at CERN. In these experiments, the atoms are first produced ... The atom is electrically neutral, since both electrons and antiprotons each have a charge of −1, whereas helium nuclei have a ...
With Helium-3 (3He) production the 4He/3He evolution is interpreted to provide an intragranular Helium-4 (4He) distribution. ... Helium dating may refer to the traditional uranium-thorium dating (abbreviated U-Th/He dating) or to a variety of He diffusion ... Helium diffusion experiments are often used to help interpret information retrieved from U-Th/He thermochronometric experiments ... A relatively new dating method, tritium-helium dating has been developed for determining rates of oxygen utilization in the ...
Helium is the second album by English post-rock band Pram, released in September 1994 through Too Pure. The Vinyl District ... "Helium - Pram". AllMusic. Retrieved 7 March 2013. CS1 maint: discouraged parameter (link) Perry, Andrew (October 1994). "Pram: ... CS1 maint: discouraged parameter (link) Helium at Discogs (list of releases) v t e. ... Fact ranked Helium at number 29 on its list of the best post-rock albums. All lyrics are written by Rosie Cuckston; all music ...
helium (countable and uncountable, plural heliums). *(uncountable) A colorless and inert gas, and the second lightest chemical ... From English helium, from New Latin helium, from Ancient Greek ἥλιος (hḗlios). ... From New Latin helium, from Ancient Greek ἥλιος (hḗlios, "sun") (because its presence was first theorised in the suns ... Retrieved from "https://en.wiktionary.org/w/index.php?title=helium&oldid=47683381" ...
Copyright / Trademark: If you have a valid legal concern (i.e. copyright or trademark) and would like to request the removal of this application, please use our online notification form. ...
Helium-2 is a hypothetical isotope of helium which according to theoretical calculations would have existed if the strong force ... I have just modified 2 external links on Isotopes of helium. Please take a moment to review my edit. If you have any questions ... Under the subtitle "Helium-2 (diproton)," the contributor suddenly introduces the name "Bradford" - as if we should all know ... so it would most likely decay to 2H in a hypothetical universe where helium-2 is bound. Double sharp (talk) 06:28, 24 October ...
... has role food packaging gas (CHEBI:77974) helium(0) (CHEBI:33681) is a monoatomic helium (CHEBI:33315) ... CHEBI:33681 - helium(0). Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ...
The Helium Mappers initiative allows community members to measure and log Helium Network coverage. ... The Helium Wallet app allows you to store, send and recieve HNT, Data Credits and Security Tokens as well as manage your ... The Helium Network presents a new opportunity for thousands of businesses that wish to build solutions without the barriers of ... Currently The Helium Network supports only the LoRaWAN wireless protocol, but the blockchain itself is frequency/protocol ...
Isnt it fun to inhale some helium from a balloon to pitch up your voice? This is now also possible with your Windows Phone. ... Isnt it fun to inhale some helium from a balloon to pitch up your voice? This is now also possible with your Windows Phone. ... Just record your voice, then move your finger up or down over the balloon to inhale or exhale helium from the balloon. Its ... Just record your voice, then move your finger up or down over the balloon to inhale or exhale helium from the balloon. Its ...
Because of this decay, the helium content of any mineral or rock capable of retaining helium will increase during the lifetime ... Helium dating, method of age determination that depends on the production of helium during the decay of the radioactive ... the helium dating method is referred to as uranium-thorium-helium dating; if only the alpha-particle emission and helium ... helium. Helium (He). , chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element ...
1. helium group, series. usage: the series of inert gases. WordNet 3.0 Copyright © 2006 by Princeton University.. All rights ...
Source for information on helium abundance interferometer: A Dictionary of Earth Sciences dictionary. ... An instrument used in remote sensing to determine very precisely the relative abundances of helium and hydrogen in planetary ... helium abundance interferometer (HAD) An instrument used in remote sensing to determine very precisely the relative abundances ... helium abundance interferometer A Dictionary of Earth Sciences © A Dictionary of Earth Sciences 1999, originally published by ...
from helium_client import Helium helium = Helium(/dev/serial0) helium.connect() channel = helium.create_channel(azure_test ... To get started, youll need accounts for both Helium Dashboard and Microsoft Azure IoT along with and an activated Helium Atom. ... This guide walks you through deploying the Helium Azure IoT Channel available within your Helium Dashboard. ... Helium Azure IoT Channel Guide. Azure IoT is Microsofts IoT solution that is part of their Azure Cloud product suite. Its a ...
Lyrics to Helium by Sia: [Verse 1] / Im trying but I keep falling down / I cry out but nothing comes now / Im giving my all ... Cause your love lifts me up like helium. Your love lifts me up like helium. Your love lifts me up like helium. Your love lifts ... Cause your love lifts me up like helium. Your love lifts me up like helium. [Bridge]. You lift me up and I am found. You lift ... Helium Lyrics Languages Arabic Deutsch Greek English Spanish French Italian Japanese Korean Netherlands Portuguese Russian ...
New helium discovery could boost the worlds dwindling supply June 29, 2016 at 10:10 am A new source of helium gas in Africa ... Western Digital Adds Helium-Filled 10TB Drives to Consumer, Business Lines May 23, 2017 at 7:30 am Western Digital is pushing ... Toshibas New 14TB Helium Hard Drive Sets Capacity Records December 11, 2017 at 7:30 am Toshiba is prepping a 14TB ... The iPhone Is Apparently Allergic to Helium November 1, 2018 at 8:15 am Apple devices will fail if used in an atmosphere with ...
Helium is the debut poetry collection by internet phenom Rudy Francisco, whose work has defined poetry for a generation of new ... E-book download Helium. Helium is the debut poetry collection by internet phenom Rudy Francisco, whose work has defined poetry ... Helium. Helium is the debut poetry collection by internet phenom Rudy Francisco, whose work has defined poetry for a generation ... Helium is the debut poetry collection by internet phenom Rudy Francisco, whose work has defined poetry for a generation of new ...
Home , Helium. Helium [1]. Helium is the second-most-abundant element in the universe - only hydrogen is more common. It ... On Earth, helium is mainly mixed with natural gas. And because its lighter than air, if it reaches the atmosphere its likely ... Helium has many scientific uses. It fills the giant balloons that carry telescopes to high altitudes, and pressurizes the fuel ... And the federal government is selling off a major helium reserve its held in the Texas panhandle. So prices have soared. ...
This suggests that helium behaves as a metal, at least at the highest pressures encountered in Jupiter and perhaps over a wider ... 2008) Fluid helium at conditions of giant planetary interiors. Proc Natl Acad Sci USA 105:11071-11075. ... Saturn may still the best case for a large effect of helium rain-out, but there is currently no direct and reliable means of ... 2007) Hydrogen-helium mixtures in the interiors of giant planets. Phys Rev B 75:024206. ...
The second lightest element, helium is a colorless, odorless, and tasteless gas that becomes liquid at -268.9 degrees Celsius. ... The boiling and freezing points of helium are lower than those of any other known substance. ... Helium, chemical element, inert gas of Group 18 (noble gases) of the periodic table. ... helium-4 atoms outnumber those of helium-3 about 700,000:1 in atmospheric helium and about 7,000,000:1 in certain helium- ...
Helium (Haskell), Helium (Pram album), Helium (band), Helium (disambiguation), Helium (film), Helium (operating system), Helium ... Phrases that include helium: helium neon laser, liquid helium, helium dating, helium light band, two fluid model for helium, ... helium: Vocabulary.com [home, info] *helium: Macmillan Dictionary [home, info] *Helium, helium: Wordnik [home, info] *helium: ... helium: General Chemistry Online [home, info] *Helium, helium: WebElements Periodic Table of the Elements [home, info] *HELIUM ...
Location: CTAN Packages softmaker-helium softmaker-helium - LaTeX Support files for the SoftMaker Helium fonts. This package ... offers LaTeX support files for the Softmaker Helium fonts (regular + bold), offered (free) from SoftMaker in June 2010, but not ...
China is going to mine the Moon for helium-3 fusion fuel January 26, 2015 at 1:01 pm Chinas space program has been steadily ...
Helium is a colorful and creative, elegant and fresh free WordPress theme. It has a charming and intuitive design that gives ... Try Helium today, and see it for yourself! Features:. *SMT Framework 2.0 ...
"We wanted to craft the perfect BBCOR bat, and the Helium chamber in the new Helium BBCOR Bat granted us this wish," said Jason ... which allows the bat to be filled with compressed Helium gas from the handle to the end cap. Helium guarantees perfect pressure ... The new BBCOR Helium Bat is a limited run of 5,000 units and its released at the same price point of RIP-IT Sports BBCOR AIR ... with the Helium BBCOR I think we are at the beginning of what will be the next evolution in baseball bats.. ...
... the telescope that brought us galactic bubbles and water on Jupiter has run out of liquid helium and will say goodbye ... To detect temperature changes just a few degrees above absolute zero, Herschel had to cool its instruments with liquid helium. ... A dried-up helium supply means it has snapped its last picture. ... Helium drought retires Herschel space telescope. Space 1 May ...
What is helium used for, and where does it come from? Learn facts about this noble gas, including how it causes balloons to ... Helium 101. What is helium used for, and where does it come from? Learn facts about this noble gas, including how it causes ... Helium 101. What is helium used for, and where does it come from? Learn facts about this noble gas, including how it causes ... While helium can be applied in seemingly countless ways, its availability is finite.. Because its lightweight, when helium is ...
Listen to Helium Head now.. Listen to Helium Head in full in the Spotify app ...
Wells in Texas (where the Federal Helium Reserve was established in 1925 near Amarillo), Oklahoma, and Kansas are the principal ... Helium is relatively rare and costly; it typically is produced as a by-product of the extraction of natural gas. ... Helium is abundant in outer space; it makes up about 23% of the mass of the visible universe. It is the end product of energy- ... Helium is relatively rare and costly; it typically is produced as a by-product of the extraction of natural gas. Wells in Texas ...
Helium definition, an inert, gaseous element present in the suns atmosphere and in natural gas, and also occurring as a ... helium. heliozoan, helipad, heliport, heliskiing, helistop, helium, helium flash, helium I, helium II, helix, hell ... helium. *. She added in the high-pitched, over-enunciated voice, like she was alternating between sucking on helium and a bong. ... notes for helium. Because it is lighter than air, helium is used to fill balloons. ...
... helium reserve to keep operating, averting a sudden helium price spike, but experts still think that prices of the gas will ... The price of helium will go up and hopefully that will encourage more mining and discovering of new helium, said Moses Chan of ... The BLMs Federal Helium Reserve supplies about 40 percent of all the helium in the United States, and about 35 percent ... It broke even in September, and had Congress not acted, would have stopped selling its helium come October.. The new law will ...
  • Helium is a colourless, odourless, non-flammable gas typically used to fill balloons. (ehow.co.uk)
  • Fatalities have occurred from inhaling helium from balloons. (ehow.co.uk)
  • Create beautiful balloon displays by inflating latex and foil balloons with our easy-to-use helium canisters. (partydelights.co.uk)
  • One option is to air-fill them, but if you want balloons to float then you will need one of our helium canisters. (b-loony.co.uk)
  • Helium balloons and Party Balloons - birthday balloons, printed balloons, balloon printing, helium balloons, helium gas tanks, party balloons and lots more. (partyshop.co.nz)
  • Our helium balloons can be inflated in Christchurch and we courier our Helium Kits throughout NZ including Auckland, Wellington and all other towns and cities in NZ. (partyshop.co.nz)
  • We offer a range of rental helium gas cylinders , which are larger and suitable for more regular use, as well as the sale of smaller disposable helium gas cylinders, safe and easy to handle and transport for small displays and events. (b-loony.co.uk)
  • The ATP30 is part of the high pressure recovery system, which catches helium boil off in a gas bag and stores it in gas cylinders, which are pressurized by a high pressure helium gas compressor. (lot-qd.nl)
  • Helium-4 on Earth was made through radioactive decay (when an atom breaks down into smaller atoms) from other elements, and it is made after the planet cooled and became solid. (wikipedia.org)
  • ATP-cleaned helium gas has an ultra-high purity of 99.9995% or better. (lot-qd.nl)
  • this may seem entertaining, but inhaling helium is actually extremely dangerous. (ehow.co.uk)
  • Inhaling helium displaces the oxygen in your lungs, which may cause serious injury or death. (ehow.co.uk)
  • Inhaling helium from a pressurised tank or canister is much more dangerous than inhaling it from a balloon because the pressurised air could also cause an air embolism or a ruptured lung. (ehow.co.uk)
  • Inhaling helium is especially unsafe for pregnant women. (ehow.co.uk)
  • Oxygen deficiency during pregnancy, such as the deficiency caused by inhaling helium, has been linked with developmental abnormalities in infants. (ehow.co.uk)
  • Inhaling helium can be dangerous, helium displaces oxygen needed for normal respiration and should not be attempted by any person. (southerngas.co.nz)
  • The nucleus (the center) of a helium-4 atom is also known as the alpha particle . (wikipedia.org)
  • Helium-4 is made of 2 protons (the part of an atomic nucleus with a positive charge ), 2 neutrons (the part of an atomic nucleus with a negative charge) and 2 electrons (the part of an atom that goes around the nucleus with a negative charge). (wikipedia.org)
  • Nanowerk News ) Scientists are currently investigating new uses for Helium Ion microscopy in nano-patterning. (nanowerk.com)
  • Other equipment that runs with the liquid helium from our ATLs are bath and flow cryostats of any kind for measurement methods like Atomic Force Microscopy (AFM), Scanning Tunneling Microscopy (STM), Fourier Transform Mass Spectroscopy (FT-MS) , Electron Paramagnetic Resonance Spectroscopy (EPR), Cathodoluminescence, Mossbauer Spectroscopy, IR Detectors und Electron Beam Ion Traps (EBIT). (lot-qd.nl)
  • Primordial helium is not much on Earth, because most of it had escaped from the Earth when it was created and the temperatures were very high. (wikipedia.org)
  • Helium is transported in a liquid form at temperatures of -269 degrees Celcius. (southerngas.co.nz)
  • The compressed helium gas is then expanded in the cold head of the purifier which generates low temperatures that cool down the dewar and the helium gas inside. (lot-qd.nl)
  • As well as providing a unique floating display, our helium canisters will save you inflation time - meaning they are both cost and time effective . (b-loony.co.uk)
  • The nucleus of helium-4 has a total spin of zero (an integer), and this makes it a boson . (wikipedia.org)
  • Helium-4 (also written 4 He) is an isotope of helium. (wikipedia.org)
  • It is the most common isotope of helium in the universe. (wikipedia.org)
  • When helium-4 in its liquid form is cooled to below -271.17 °C (2.71 K ), it turns into a superfluid . (wikipedia.org)
  • The liquid helium chamber housing the coil has been welded shut. (rowha.nl)
  • This report studies the global Liquid Helium market status and forecast, categorizes the global Liquid Helium market size (value & volume) by manufacturers, type, application, and region. (rowha.nl)
  • Liquid Helium Transfer Lines for liquid helium Overview. (rowha.nl)
  • A wide variety of liquid helium options are available to you, such as free samples. (rowha.nl)
  • Helium is mainly used in its liquid form (cryogenics) for the cooling of superconducting magnets found in medical scanning instruments. (southerngas.co.nz)
  • As the ATP30 is used to supply the ATLs with clean helium gas, it is used everywhere where the ATLs are used, for example for the recovery of liquid helium in magnetism and cryotechnology with Quantum Design products like the MPMS and PPMS, with Magnetoencephalography (MEG) systems by Elekta and with Nuclear Magnetic Resonance (NMR) systems by various suppliers. (lot-qd.nl)
  • For example, if helium-4 as a superfluid is placed in an open container, it will climb the walls of the container and spill out. (wikipedia.org)
  • Symptoms of minor to moderate oxygen deficiency caused by helium inhalation include an altered voice, increased pulse rate, increased breathing rate, muscular coordination problems, fatigue, breathing problems and emotional upset. (ehow.co.uk)
  • At oxygen levels below 10%, individuals experience nausea, vomiting, collapse and loss of consciousness from helium inhalation. (ehow.co.uk)
  • Seek emergency medical attention if an individual is suffering from oxygen displacement caused by helium inhalation. (ehow.co.uk)
  • However, helium inhalation of any form is never safe. (ehow.co.uk)
  • The Advanced Technology Purifier (ATP) can purify up to 30 liters of helium gas per minute. (lot-qd.nl)
  • The purpose of the study is to look at how the air moves in the lungs using inhaled hyperpolarized helium gas with Magnetic Resonance Imaging (MRI). (uvahealth.com)
  • Helium-4 is also made in nuclear fusion at the center of stars. (wikipedia.org)
  • The hermetically sealed drives are filled with helium, which is one-seventh the density of air. (computerworld.com)
  • If an area may have a helium leak, do not enter the area without a breathing apparatus. (ehow.co.uk)
  • The helium-filled drives will be targeted for use in public cloud computing systems and in corporate data centers, he added. (computerworld.com)
  • For over two years, the ORION Plus Helium Ion Microscope from Carl Zeiss has been known for its excellence in imaging uncoated insulating samples and soft materials with sub- nanometer resolution (resolution specification (nanowerk.com)
  • The most abundant planetary constituents in the universe are hydrogen and helium. (pnas.org)
  • Here again we have hydrogen and helium represented by bright lines, while the origin of the remaining bright lines is doubtful. (dictionary.com)
  • The dogma in the field was that the characteristics of hydrogen and helium were different enough that the two wouldn't mix inside giant gaseous planets, Jeanloz said. (redorbit.com)
  • Scientists have understood for some time that the most abundant elements in the Universe are simple gases like hydrogen and helium. (universetoday.com)
  • that is telling us a lot about how atmospheres of [some] exoplanets evolve with time, the ones that have an envelope of hydrogen and helium and are close to a star emitting a strong flux in the UV," he added. (livescience.com)
  • Similarly, in the wave mechanical treatment of the scattering of α-particles by hydrogen and helium, the 'α-particle wave' scattered by the nucleus will differ from that scattered by a Coulomb field only by the spherically symmetrical wave scattered by that region (small compared with the wave-length of the incident α-particles) where the interaction energy differs from the Coulomb value. (nature.com)
  • TAYLOR, H. Anomalous Scattering of α-Particles by Hydrogen and Helium. (nature.com)
  • However, if we could go back to when the Solar System was first forming, we'd discover that every planet would have had an atmosphere loaded up with the two most common elements in the Universe: Hydrogen and Helium. (scienceblogs.com)
  • The vast majority of the Hydrogen and Helium would have been confined to the Earth's atmosphere, and quickly would have risen to the uppermost layers. (scienceblogs.com)
  • Amid a global helium shortage , Party City announced Thursday it will shutter 45 stores in 2019. (desmoinesregister.com)
  • A new source of helium gas in Africa could help alleviate the current worldwide shortage. (extremetech.com)
  • Why Is There a Helium Shortage? (popularmechanics.com)
  • A crucial ingredient in MRI machines, wafer manufacturing, welding, and more, helium is experiencing a shortage that's driving up its price around the world. (popularmechanics.com)
  • Watch the video above to learn more about shortage hitting the earth's helium supply. (cnbc.com)
  • A new approach to gas exploration has discovered a huge helium gas field, which could address the increasingly critical shortage of this vital yet rare element. (eurekalert.org)
  • Could gas shortage pop WD's helium drive plans? (computerworld.com)
  • Helium dating , method of age determination that depends on the production of helium during the decay of the radioactive isotopes uranium-235 , uranium-238 , and thorium-232 . (britannica.com)
  • Because of this decay, the helium content of any mineral or rock capable of retaining helium will increase during the lifetime of that mineral or rock, and the ratio of helium to its radioactive progenitors then becomes a measure of geologic time . (britannica.com)
  • if only the alpha-particle emission and helium content are measured, the method is called the alpha-helium radioactive clock. (britannica.com)
  • A thermal event that will leave most radioactive clocks relatively unaffected may have a drastic effect on the helium radioactive clock. (britannica.com)
  • In 1903 Ramsay and Frederick Soddy further determined that helium is a product of the spontaneous disintegration of radioactive substances. (britannica.com)
  • Although helium occurs in Earth's atmosphere only to the extent of 1 part in 200,000 (0.0005 percent) and small amounts occur in radioactive minerals, meteoric iron , and mineral springs, great volumes of helium are found as a component (up to 7.6 percent) in natural gases in the United States (especially in Texas , New Mexico , Kansas , Oklahoma , Arizona, and Utah). (britannica.com)
  • The helium that is present on Earth is not a primordial component but has been generated by radioactive decay. (britannica.com)
  • Alpha particles , ejected from the nuclei of heavier radioactive substances, are nuclei of the isotope helium-4. (britannica.com)
  • Helium occurs in natural gas, in radioactive ores, and in small amounts in the atmosphere. (dictionary.com)
  • The unique atomic structure of helium-3 promised to make it possible to use it as fuel for nuclear fusion, the process that powers the sun, to generate vast amounts of electrical power without creating the troublesome radioactive byproducts produced in conventional nuclear reactors. (popularmechanics.com)
  • Although helium only exists in trace amounts on Earth, it is continually produced by the decay of radioactive elements. (reference.com)
  • Radioactive decay causes uranium rock to disperse helium into natural gas chambers over millions of years. (cnbc.com)
  • Usable helium comes instead from the decay of uranium, thorium and other radioactive elements deep underground. (reuters.com)
  • Helium-4 is the product of radioactive alpha decay whereas Helium-3 is primordial. (infidels.org)
  • The second most abundant element in the universe after hydrogen, Helium (symbol He) is a colorless, odorless, nonmetallic gas that is produced abundantly by the nuclear fusion in all stars and is found in smaller amounts on Earth. (dictionary.com)
  • While historians credit Janssen and Lockyer with the discovery of helium, Sir William Ramsay, a Scottish chemist, as well as two Swedish chemists who worked independently of Ramsay, Nils Langlet and Per Theodor Cleve, were the first to isolate it in the lab. (reference.com)
  • Erected 1968, commemorating the 100th Anniversary of discovery of helium in the gaseous atmosphere surrounding the sun. (hmdb.org)
  • From Wikipedia , The Helium Centennial Time Columns Monument was built in 1968 to commemorate the 100th anniversary of the discovery of helium. (hmdb.org)
  • A case in point is the recent announcement of the discovery of helium hydride in space, the first molecule purported to have formed in the universe. (answersingenesis.org)
  • One of the first iPhone 5 battery cases to hit the market, Mophie's Juice Pack Helium sets the bar high, with a sleek, lightweight design that delivers hours of added talk time. (pcmag.com)
  • Lenmar's Meridian was the first in our hands but was then held back from stores, followed by Mophie's Juice Pack Helium ($80), which shipped in small quantities before further units were delayed until March. (ilounge.com)
  • Are the halo nuclei of 6 He and 8 He the reason they have relatively long half-lives, compared to the other unstable isotopes of helium? (wikipedia.org)
  • The nucleus of every helium atom contains two protons , but, as is the case with all elements, isotopes of helium exist. (britannica.com)
  • The known isotopes of helium contain from one to six neutrons , so their mass numbers range from three to eight. (britannica.com)
  • This event is believed to have produced the majority of helium-4, along with small amounts of the hydrogen, helium and lithium isotopes. (universetoday.com)
  • Although other countries produce helium, the natural gas fields elsewhere around the globe are much less helium-rich than those near Amarillo. (popularmechanics.com)
  • At current production rates of about 2 billion cubic feet per year, the reservoir could continue to produce helium for five to six more years. (popularmechanics.com)
  • The researchers treated clevite, an ore containing uranium, with acid to produce helium. (reference.com)
  • Sept. 1, 1937, ch. 895, 50 Stat. 886 , authorized Bureau of Mines to produce helium gas. (house.gov)
  • Most gas fields do not produce helium in sufficient concentrations to make it worthwhile separating out. (reuters.com)
  • helium abundance interferometer (HAD) An instrument used in remote sensing to determine very precisely the relative abundances of helium and hydrogen in planetary atmospheres by means of an interferometer . (encyclopedia.com)
  • One of the prevailing theories is that droplets of helium condense out of the planets' outer atmospheres and fall to their centers as "helium rain," releasing gravitational energy. (redorbit.com)
  • But two new papers published today (Dec. 6) in the journal Science pinpoint the movement of helium in alien atmospheres from the comfort of our home planet. (livescience.com)
  • In their new paper , Nortmann's group looked for helium in the outer atmospheres of multiple planets. (livescience.com)
  • Twenty years ago, researchers hypothesized that a distinctive wavelength of near-infrared radiation absorbed by helium when light passes through the gas could be used to track the element in distant atmospheres, Nortmann said. (livescience.com)
  • In scientific endeavours NASA uses it in rocket fuel, pressurizing and purging systems, maintaining controlled atmospheres, divers use it (rarely recreational), gas chromatography and the CERN also use Helium as a coolant. (infobarrel.com)
  • Helium (He) , chemical element, inert gas of Group 18 (noble gases) of the periodic table. (britannica.com)
  • Helium is a very stable, safe inert gas that we use for many things from healthcare to manufacturing to science to retail. (infobarrel.com)
  • Helium is widely used as an inert gas shield for arc welding, and as a protective gas for growing silicon and germanium crystals as well as for titanium and zirconium production. (wikiversity.org)
  • Helium can also be used wherever an unreactive atmosphere is needed, e.g., in electric arc welding, in growing crystals of silicon and germanium for semiconductors, and in refining titanium and zirconium metals. (infoplease.com)
  • Apple devices will fail if used in an atmosphere with trace amounts of helium in it. (extremetech.com)
  • Helium does not accumulate in large quantities in the atmosphere because Earth's gravity is not sufficient to prevent its gradual escape into space. (britannica.com)
  • Because it's lightweight, when helium is released in the atmosphere, it floats into space and is lost to Earth forever. (nationalgeographic.com)
  • Researchers modeled the atmosphere based on their observations to determine whether this helium was escaping the planet. (livescience.com)
  • The Carmenes spectrograph can finely measure the wavelength absorbed, which shows when the helium atmosphere is in front of the star and the speed the helium is moving toward Earth - because light turns bluer when it's headed toward us. (livescience.com)
  • Although helium is the second most abundant element in the universe, most of it in the Earth's atmosphere bleeds off into space. (popularmechanics.com)
  • While the pure hydrogen gas and the helium would have been kicked off the planet relatively quickly by the Sun, the remaining gases would have stuck around for much longer, eventually leaving behind only the heaviest components of our atmosphere. (scienceblogs.com)
  • To be more precise, Helium composes 0.00052% of the Earth's atmosphere by volume. (scienceblogs.com)
  • Helium is the second-most abundant element in the known universe, but it's hard to capture on Earth because of how easily it floats out of the atmosphere and into space. (cnbc.com)
  • A mixture of 80% helium and 20% oxygen is used as an artificial atmosphere for divers and others working under pressure. (wikiversity.org)
  • After the time columns were filled, the caps were welded on and the contents sealed in a helium atmosphere. (hmdb.org)
  • Dr. Dalrymple goes on to explain that even though our understanding of the helium balance in the atmosphere is incomplete, the situation being very complicated because of various hardtocalculate factors, we do know one thing. (infidels.org)
  • it is clear that helium can and does escape from the atmosphere in amounts sufficient to balance production. (infidels.org)
  • Liquid helium existing as a normal fluid between the superfluid transition point of approximately 2.2°K at 1 atmosphere pressure and its boiling point of 4.2°K. (thefreedictionary.com)
  • as is the rate at which helium is presently escaping from the atmosphere into interplanetary space. (answersingenesis.org)
  • We will explain how the rate of loss of helium from the atmosphere has been obtained. (answersingenesis.org)
  • Since the rate of loss is less than the rate at which helium is entering the atmosphere, the evidence does indicate a young age for the earth (of the order of two million years), a result which is well known amongst atmospheric scientists. (answersingenesis.org)
  • To understand the mechanism by which helium is known to be escaping from the atmosphere, we can do no better than quote from the reference Walker. (answersingenesis.org)
  • Somebody got an alligator breathing a mixture of helium and oxygen, convinced it to bellow, and recorded the results. (talkbass.com)
  • The two research teams both used a 3.5-meter (11 feet) telescope in Calar Alto, Spain, to make their measurements - taking advantage of the telescope's powerful CARMENES instrument (short for Calar Alto high- Resolution search for M dwarfs with Exoearths with Near-infrared and optical Échelle Spectrographs) to finely measure the action of helium surrounding the planets. (livescience.com)
  • The British chemist Sir William Ramsay discovered the existence of helium on Earth in 1895. (britannica.com)
  • And in 1895, while searching for argon, Scottish chemist Sir William Ramsay managed to isolate helium by treating a sample of cleveite with mineral acids. (universetoday.com)
  • Freeman inhales a gulp of helium and says in his baby voice, "I'm never coming back. (sheknows.com)
  • Helium-2 is a hypothetical isotope of helium which according to theoretical calculations would have existed if the strong force had been 2% greater. (wikipedia.org)
  • If mining the moon for helium sounds impractical and crazy, it wouldn't be if we could use a specific isotope of helium for a fusion reactor. (techdirt.com)
  • Helium is the 2nd lightest element - second only to hydrogen. (nationalgeographic.com)
  • And between the two, helium is the second lightest and second most abundant element, being present in about 24% of observable Universe's elemental mass. (universetoday.com)
  • The Helium is the thinnest and lightest Juice Pack, at 0.59 inch thick and 2.4 ounces, but the case itself is a bit long at 5.49 inches-that's taller than gargantuan 5.4-inch Samsung Galaxy S III , and if you have pants with shallow pockets that could prove a bit problematic. (pcmag.com)
  • I have this one little saying, when things get too heavy just call me helium, the lightest known gas to man. (scienceblogs.com)
  • The government put it there back in 1925 because natural gas produced at the gas fields between Amarillo and Hugoton, Kan., has a very high helium concentration-up to 1.9 percent. (popularmechanics.com)
  • Back in 1925 the United States of America Government started to stockpile Helium under the belief of a future role in air travel. (infobarrel.com)
  • The United States has been the largest producer of helium since 1925, thanks to a massive reserve found across Texas, Oklahoma and Kansas - fittingly named the Federal Helium Reserve. (cnbc.com)
  • Because it is so reactive, helium hydride doesn't exist naturally on earth, and it wasn't produced artificially until 1925. (answersingenesis.org)
  • Though new private helium production plants are set to come online in the coming years-including a Wyoming plant expected to open later this year-private industry hasn't been as interested in producing helium as Congress hoped. (popularmechanics.com)
  • However, legislative authorisation for sales from the reserve will expire in the next few months, leaving lawmakers scrambling to extend the sales programme temporarily, while putting in place proper price incentives and a market to enable a private helium production industry to flourish in the long term. (reuters.com)
  • The legislation in 1996 says we were supposed to get out of the helium business," says Joe Peterson, the Bureau of Land Management's assistant field manager for helium in Amarillo. (popularmechanics.com)
  • Prices for refined helium sold to end-users have quadrupled from $40 per thousand cubic feet in 2000 to $160 in 2012, according to the U.S. Government Accountability Office, which warned the Natural Resources Committee of the House of Representatives last month of "urgent issues facing the Bureau of Land Management's storage and sale of helium reserves. (reuters.com)
  • A relatively new dating method, tritium-helium dating has been developed for determining rates of oxygen utilization in the ocean. (wikipedia.org)
  • When mixed with oxygen in a high pressure environment, helium allows deep sea divers to breathe in the air from their oxygen tanks more easily. (nationalgeographic.com)
  • Helium ballons float because they are lighter than oxygen. (ehow.com)
  • When you inhale helium, you are not getting enough oxygen. (ehow.com)
  • explains that when you inhale helium, you aren't getting oxygen and ultimately cannot breath. (ehow.com)
  • We have shown distribution curves for atomic hydrogen, atomic oxygen, and helium at 1500 K. (answersingenesis.org)
  • About 54 billion cubic feet of helium might last about 6 years or so at the global consumption rate, but this is the first time anyone has actually gone specifically looking for helium deposits (successfully). (techdirt.com)
  • The federal government, which sets helium prices, announced in April that helium prices would spike from $75.75 per thousand cubic feet (Mcf) in FY 2012 to $84 per Mcf in FY 2013. (popularmechanics.com)
  • Between 10 and 12 billion cubic feet of recoverable helium are expected to remain in the reservoir by the end of 2014, Walter Nelson, director of helium sourcing for Air Products and Chemicals, Inc., told the U.S. Senate Energy and Natural Resources Committee in May. (popularmechanics.com)
  • By combining our understanding of helium geochemistry with seismic images of gas trapping structures, independent experts have calculated a probable resource of 54 Billion Cubic Feet (BCf) in just one part of the rift valley. (eurekalert.org)
  • In future, however, the most promising source of helium is the giant liquefaction plants used to produce LNG. (reuters.com)
  • Small quantities of helium-3 previously discovered on Earth intrigued the scientific community. (popularmechanics.com)
  • In recent years, MRI makers have adapted their systems to use smaller quantities of helium and recycle more of it. (reuters.com)
  • Large quantities of helium extracted from natural gas are stored underground northwest of Amarillo, and will provide a valuable source of supply for many years. (hmdb.org)
  • He and his colleagues had previously found that helium starts to have some metal-like qualities in experiments at extremely high pressure, but they have not yet been able to experiment with helium under the conditions found inside giant planets. (redorbit.com)
  • July 26, 1947, ch. 343, title II, §205(a), 61 Stat. 501 , authorized Navy Department to acquire helium-gas lands and to produce and experiment with helium gas. (house.gov)
  • A severe reduction in the availability of helium could force hospitals to replace costly MRI magnets or restrict patient access to them. (popularmechanics.com)
  • Sheldon and Kern [1972] estimated that 20 geomagnetic-field reversals over the past 3.5 million years would have assured a balance between helium production and loss. (infidels.org)
  • Helium is the second-most-abundant element in the universe - only hydrogen is more common. (stardate.org)
  • Helium is the second most abundant element in the universe, created during the Big Bang and found in stars, planets, even our own moon. (nationalgeographic.com)
  • So, they picked helium, the second most abundant element, which comprises five to 10 percent of the universe. (redorbit.com)
  • Helium is an element that is abundant in the Universe and while it is the second most abundant element on Earth, it is a limited supply. (infobarrel.com)
  • The universe is abundant with Helium. (infobarrel.com)
  • Helium was pretty abundant and reasonably inexpensive," the race's founder, Mark Sullivan, told KRQE. (cbsnews.com)
  • Helium is the second most abundant element in the universe but finding it on Earth is tricky. (uncommondescent.com)
  • Inhaling helium too fast or from a pressure tank can create helium bubbles in your body. (ehow.com)
  • An article on the Kidz World website, 'How Helium Works,' informs us that inhaling helium too fast or from a pressure tank can create helium bubbles in your body. (ehow.com)
  • However, hydrogen has the additional complication of molecular dissociation, whereas helium should be comparatively simple. (pnas.org)
  • Before the use of mass spectrometry in isotopic geochronology , helium dating provided most of the dates used in the early geologic time scales. (britannica.com)
  • Helium mass spectrometry leak detection provides a rapid, sensitive and reliable way to locate or precisely measure leaks that impact the quality or longevity of a wide range of parts and systems. (photonics.com)
  • Once used only in lighter-than-air craft, helium now serves vital needs in industry, science, and the nation's military and space programs. (hmdb.org)
  • Liquid helium is essential for many low temperature applications (see low-temperature physics ), and is used as a coolant in particle accelerators and MRI machines. (infoplease.com)
  • To detect temperature changes just a few degrees above absolute zero, Herschel had to cool its instruments with liquid helium. (newscientist.com)
  • The study, published in this week's online edition of the journal Proceedings of the National Academy of Sciences, demonstrates that metallic helium is less rare than was previously thought and is produced under the kinds of conditions present at the centers of giant, gaseous planets, mixing with metal hydrogen and forming a liquid metal alloy. (redorbit.com)
  • But under the kinds of pressure and temperature found at the centers of Jupiter and Saturn, the researchers found that helium turns into a liquid metal, like mercury. (redorbit.com)
  • at present, the only viscosity measurements on liquid helium have been made in Toronto 1 , and showed that there is a drop in viscosity below the λ-point by a factor of 3 compared with liquid helium at normal pressure, and by a factor of 8 compared with the value just above the λ-point. (nature.com)
  • The important fact that liquid helium has a specific density p of about O.15, not very different from that of an ordinary fluid, while its viscosity μ is very small comparable to that of a gas, makes its kinematic viscosity v=μ/p extraordinary small. (nature.com)
  • The very small kinematic viscosity of liquid helium II thus makes it difficult to measure the viscosity. (nature.com)
  • Lowering and raising this plunger in the liquid helium by means of the thread (4), the level of the liquid column in the tube 3 could be set above or below the level (5) of the liquid in the surrounding Dewar flask. (nature.com)
  • We are making experiments in the hope of still further reducing the upper limit to the viscosity of liquid helium II, but the present upper limit (namely, 10 −9 C.G.S.) is already very striking, since it is more than 10 4 times smaller than that of hydrogen gas (previously thought to be the fluid of least viscosity). (nature.com)
  • Liquid helium is a quiet engine of American research and business. (jewishjournal.com)
  • Yet due in large part to disruptions in the supply chain - particularly the continuing economic isolation of Qatar by many of its neighbors - and unplanned production outages, scientists and engineers across the United States are grappling with shortages and rising prices of liquid helium. (jewishjournal.com)
  • One of the recent largest uses for helium has been for pressurizing liquid fuel rockets. (wikiversity.org)
  • Liquid helium is supplied from Qatar Helium-2 production facility in Ras Laffan with a 20 years SPA to Iwatani Corporation. (thefreedictionary.com)
  • The study demonstrates that metallic helium is less rare than was previously thought, and is produced under the kinds of conditions present at the centers of giant gaseous planets such as Jupiter and Saturn, mixing with metal hydrogen to form a liquid metal alloy. (nsf.gov)
  • The trace of the isotope helium-3 on Earth is attributable to the negative beta decay of the rare hydrogen-3 isotope ( tritium ). (britannica.com)
  • Furthermore, helium-3 is connected inse- parably with tritium via the tritium decay. (springer.com)
  • He named the element helium from helios, the Greek word for sun. (dictionary.com)
  • The name is derived from the Greek, 'helios' meaning sun, as it was in the sun's corona that helium was first detected. (wikiversity.org)
  • Substituting helium-3 for tritium significantly reduces neutron production, making it safe to locate fusion plants nearer to where power is needed the most, large cities. (popularmechanics.com)
  • Operator Cindy Sizemore installs a tank to be filled with helium-3, a byproduct of the tritium manufacturing process. (augusta.com)
  • Savannah River Site has replaced and upgraded a 40-year-old system for separating and capturing helium-3, a byproduct of the site's role in the manufacture of tritium for nuclear bombs. (augusta.com)
  • The helium-3 recovery system upgrade project and others like it are critical for the SRS tritium operation to continue providing safe, secure, reliable and cost-effective solutions to meet national needs," said SRS Office Manager Doug Dearolph. (augusta.com)
  • In recent years helium shortages had started growing acute. (aps.org)
  • Problems at helium refineries in Texas, Oklahoma and Kansas, as well as start up delays with new refining facilities in Qatar in 2006, led to shortages and rationing. (reuters.com)
  • Helium used for industrial purposes is a byproduct of natural gas production, and the Texas Panhandle is the United States' helium capital. (popularmechanics.com)
  • Almost every known helium reserve on the planet was discovered by accident , and the helium was merely a byproduct of natural gas harvesting. (cnbc.com)
  • The football filled with helium didn't go as far as the normal football, since the normal ball was heavier it had more momentum and was able to go farther. (halfbakery.com)
  • The amount of the heavier Helium-4 lost by this method appears to be far short of the amount produced. (infidels.org)
  • A bill to avert the looming 'helium cliff' was first introduced in the House in February, followed by a corresponding Senate bill in late April. (aps.org)
  • LONDON, March 27 (Reuters) - Bipartisan bills introduced into the U.S. House of Representatives and Senate aim to avert the imminent shutdown of the Federal Helium Reserve, which provides a third of all the gas consumed worldwide, and develop a proper market to avoid a long-term crunch in supplies of one of the world's most critical raw materials. (reuters.com)
  • Setting the 'hot air' jokes aside, when senators voted to pass bipartisan legislation to avert a helium crisis Thursday, they used the helium revenue to pay for an assortment of other priorities. (rollcall.com)
  • This suggests that helium behaves as a metal, at least at the highest pressures encountered in Jupiter and perhaps over a wider range of pressures in the many, often much hotter, planets of Jupiter's mass and larger that are now evidently common in the universe ( 5 ). (pnas.org)
  • Helium constitutes about 23 percent of the mass of the universe and is thus second in abundance to hydrogen in the cosmos. (britannica.com)
  • But there is plenty of Helium here on Earth, and it has nothing to do with Helium anyplace else in the rest of the Universe. (scienceblogs.com)
  • This is a game changer for the future security of society's helium needs and similar finds in the future may not be far away. (eurekalert.org)
  • Once we run out of helium on earth, there aren't a lot of great options for obtaining more. (techdirt.com)
  • On Earth, helium is mainly mixed with natural gas. (stardate.org)
  • In this study, Jeanloz and Lars Stixrude, earth sciences professor at University College London, took a closer look at what happens to helium under such extreme conditions. (redorbit.com)
  • Extracting helium-3 from the moon and returning it to Earth would, of course, be difficult, but the potential rewards would be staggering for those who embarked upon this venture. (popularmechanics.com)
  • For some time, helium was believed to exist only in the Sun. However, in 1882, Italian physicist Luigi Palmieri detected helium on Earth when analyzing lava from Mount Vesuvius after it erupted in that year. (universetoday.com)
  • From the birth of the Solar System, there's practically no Helium left on Earth. (scienceblogs.com)
  • The discovery of traces of helium on earth was first announced in 1895. (hmdb.org)
  • Can a computer simulation show that helium compounds exist on Earth? (uncommondescent.com)
  • Diveena Danabalan, of Durham University's Department of Earth Sciences, said: 'We show that volcanoes in the Rift play an important role in the formation of viable helium reserves. (eurekalert.org)
  • The history of the creation of elements on earth such as Helium is described and illustrated with colorful cartoons. (thefreedictionary.com)
  • Helium diffusion experiments are often used to help interpret information retrieved from U-Th/He thermochronometric experiments. (wikipedia.org)
  • The experiments also showed that in the case of helium II, the pressure drop across the gap was proportional to the square of the velocity of flow, which means that the flow must have been turbulent. (nature.com)
  • Helium was discovered in 1895 by Sir William Ramsey in London, UK, and independently by Per Theodor Cleve and Nils Langlet in Uppsala, Sweden. (wikiversity.org)