Argon: 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.Argon Plasma Coagulation: A method of tissue ablation and bleeding control that uses ARGON plasma (ionized argon gas) to deliver a current of thermocoagulating energy to the area of tissue to be coagulated.Laser Therapy: The use of photothermal effects of LASERS to coagulate, incise, vaporize, resect, dissect, or resurface tissue.Laser Coagulation: The use of green light-producing LASERS to stop bleeding. The green light is selectively absorbed by HEMOGLOBIN, thus triggering BLOOD COAGULATION.Light Coagulation: The coagulation of tissue by an intense beam of light, including laser (LASER COAGULATION). In the eye it is used in the treatment of retinal detachments, retinal holes, aneurysms, hemorrhages, and malignant and benign neoplasms. (Dictionary of Visual Science, 3d ed)Lasers, Gas: Lasers in which a gas lasing medium is stimulated to emit light by an electric current or high-frequency oscillator.Krypton: 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.Electrocoagulation: Procedures using an electrically heated wire or scalpel to treat hemorrhage (e.g., bleeding ulcers) and to ablate tumors, mucosal lesions, and refractory arrhythmias. It is different from ELECTROSURGERY which is used more for cutting tissue than destroying and in which the patient is part of the electric circuit.Plasma Gases: 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).Hemostasis, Endoscopic: Control of bleeding performed through the channel of the endoscope. Techniques include use of lasers, heater probes, bipolar electrocoagulation, and local injection. Endoscopic hemostasis is commonly used to treat bleeding esophageal and gastrointestinal varices and ulcers.Proctitis: INFLAMMATION of the MUCOUS MEMBRANE of the RECTUM, the distal end of the large intestine (INTESTINE, LARGE).Trabeculectomy: Any surgical procedure for treatment of glaucoma by means of puncture or reshaping of the trabecular meshwork. It includes goniotomy, trabeculectomy, and laser perforation.Gastric Antral Vascular Ectasia: A distinct vascular lesion in the PYLORIC ANTRUM that is characterized by tortuous dilated blood vessels (ectasia) radiating outward from the PYLORUS. The vessel pattern resembles the stripes on the surface of a watermelon. This lesion causes both acute and chronic GASTROINTESTINAL HEMORRHAGE.Societies, Pharmaceutical: Societies whose membership is limited to pharmacists.WashingtonPublic Opinion: The attitude of a significant portion of a population toward any given proposition, based upon a measurable amount of factual evidence, and involving some degree of reflection, analysis, and reasoning.Politics: Activities concerned with governmental policies, functions, etc.Policy Making: The decision process by which individuals, groups or institutions establish policies pertaining to plans, programs or procedures.Career Choice: Selection of a type of occupation or profession.United StatesNeural Plate: The region in the dorsal ECTODERM of a chordate embryo that gives rise to the future CENTRAL NERVOUS SYSTEM. Tissue in the neural plate is called the neuroectoderm, often used as a synonym of neural plate.Insulin-Like Growth Factor I: A well-characterized basic peptide believed to be secreted by the liver and to circulate in the blood. It has growth-regulating, insulin-like, and mitogenic activities. This growth factor has a major, but not absolute, dependence on GROWTH HORMONE. It is believed to be mainly active in adults in contrast to INSULIN-LIKE GROWTH FACTOR II, which is a major fetal growth factor.Molecular Chaperones: A family of cellular proteins that mediate the correct assembly or disassembly of polypeptides and their associated ligands. Although they take part in the assembly process, molecular chaperones are not components of the final structures.Insulin-Like Growth Factor II: A well-characterized neutral peptide believed to be secreted by the LIVER and to circulate in the BLOOD. It has growth-regulating, insulin-like and mitogenic activities. The growth factor has a major, but not absolute, dependence on SOMATOTROPIN. It is believed to be a major fetal growth factor in contrast to INSULIN-LIKE GROWTH FACTOR I, which is a major growth factor in adults.Peptides: Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.HSP90 Heat-Shock Proteins: A class of MOLECULAR CHAPERONES whose members act in the mechanism of SIGNAL TRANSDUCTION by STEROID RECEPTORS.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Lions: Large, chiefly nocturnal mammals of the cat family FELIDAE, species Panthera leo. They are found in Africa and southern Asia.Carnivora: An order of MAMMALS, usually flesh eaters with appropriate dentition. Suborders include the terrestrial carnivores Fissipedia, and the aquatic carnivores PINNIPEDIA.Tanzania: A republic in eastern Africa, south of UGANDA and north of MOZAMBIQUE. Its capital is Dar es Salaam. It was formed in 1964 by a merger of the countries of TANGANYIKA and ZANZIBAR.Antelopes: Any of various ruminant mammals of the order Bovidae. They include numerous species in Africa and the American pronghorn.Animals, Wild: Animals considered to be wild or feral or not adapted for domestic use. It does not include wild animals in zoos for which ANIMALS, ZOO is available.Africa, Eastern: The geographical area of Africa comprising BURUNDI; DJIBOUTI; ETHIOPIA; KENYA; RWANDA; SOMALIA; SUDAN; TANZANIA; and UGANDA.Copyright: It is a form of protection provided by law. In the United States this protection is granted to authors of original works of authorship, including literary, dramatic, musical, artistic, and certain other intellectual works. This protection is available to both published and unpublished works. (from Circular of the United States Copyright Office, 6/30/2008)MexicoImage Processing, Computer-Assisted: A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.Click Chemistry: Organic chemistry methodology that mimics the modular nature of various biosynthetic processes. It uses highly reliable and selective reactions designed to "click" i.e., rapidly join small modular units together in high yield, without offensive byproducts. In combination with COMBINATORIAL CHEMISTRY TECHNIQUES, it is used for the synthesis of new compounds and combinatorial libraries.New MexicoImage Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Mars: The fourth planet in order from the sun. Its two natural satellites are Deimos and Phobos. It is one of the four inner or terrestrial planets of the solar system.Extraterrestrial Environment: The environment outside the earth or its atmosphere. The environment may refer to a closed cabin (such as a space shuttle or space station) or to space itself, the moon, or other planets.Spacecraft: Devices, manned and unmanned, which are designed to be placed into an orbit about the Earth or into a trajectory to another celestial body. (NASA Thesaurus, 1988)Atmosphere: The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)ConnecticutUnited States National Aeronautics and Space Administration: An independent Federal agency established in 1958. It conducts research for the solution of problems of flight within and outside the Earth's atmosphere and develops, constructs, tests, and operates aeronautical and space vehicles. (From U.S. Government Manual, 1993)Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Noble Gases: Elements that constitute group 18 (formerly the zero group) of the periodic table. They are gases that generally do not react chemically.Elements: Substances that comprise all matter. Each element is made up of atoms that are identical in number of electrons and protons and in nuclear charge, but may differ in mass or number of neutrons.Earth (Planet): Planet that is the third in order from the sun. It is one of the four inner or terrestrial planets of the SOLAR SYSTEM.Evolution, Chemical: Chemical and physical transformation of the biogenic elements from their nucleosynthesis in stars to their incorporation and subsequent modification in planetary bodies and terrestrial biochemistry. It includes the mechanism of incorporation of biogenic elements into complex molecules and molecular systems, leading up to the origin of life.Lasers: 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.Lasers, Solid-State: Lasers which use a solid, as opposed to a liquid or gas, as the lasing medium. Common materials used are crystals, such as YAG (YTTRIUM aluminum garnet); alexandrite; and CORUNDUM, doped with a rare earth element such as a NEODYMIUM; ERBIUM; or HOLMIUM. The output is sometimes additionally modified by addition of non-linear optical materials such as potassium titanyl phosphate crystal, which for example is used with neodymium YAG lasers to convert the output light to the visible range.Plasticizers: Materials incorporated mechanically in plastics (usually PVC) to increase flexibility, workability or distensibility; due to the non-chemical inclusion, plasticizers leach out from the plastic and are found in body fluids and the general environment.Vocal Cord Dysfunction: A disorder characterized by an intermittent abnormal VOCAL CORDS movement toward the midline during inspiration or expiration resulting in upper AIRWAY OBSTRUCTION.

MgATP-independent hydrogen evolution catalysed by nitrogenase: an explanation for the missing electron(s) in the MgADP-AlF4 transition-state complex. (1/204)

When the MoFe (Kp1) and Fe (Kp2) component proteins of Klebsiella pneumoniae nitrogenase are incubated with MgADP and AlF4(-) in the presence of dithionite as a reducing agent, a stable putative transition-state complex is produced [Yousafzai and Eady (1997) Biochem. J. 326, 637-640]. Surprisingly, the EPR signal associated with reduced Kp2 is not detectable, but Kp1 retains the S=3/2 EPR signal arising from the dithionite reduced state of the MoFe cofactor centre of the protein. This is consistent with the [Fe4S4] centre of the Fe protein in the complex being oxidized, and similar observations have been made with the complex of Azotobacter vinelandii [Spee, Arendsen, Wassink, Marritt, Hagen and Haaker (1998) FEBS Lett. 432, 55-58]. No satisfactory explanation for the fate of the electrons lost by Kp2 has been forthcoming. However, we report here that during the preparation of the MgADP-AlF4 K. pneumoniae complex under argon, H2 was evolved in amounts corresponding to one half of the FeMoco content of the Kp1 (FeMoco is the likely catalytic site of nitrogenase with a composition Mo:Fe7:S9:homocitrate). This is surprising, since activity is observed during incubation in the absence of MgATP, normally regarded as being essential for nitrogenase function, and in the presence of MgADP, a strong competitive inhibitor of nitrogenase. The formation of H2 by nitrogenase in the absence of AlF4(-) was also observed in reaction mixtures containing MgADP but not MgATP. The reaction showed saturation kinetics when Kp1 was titrated with increasing amounts of Kp2 and, at saturation, the amount of H2 formed was stoichiometric with the FeMoco content of Kp1. The dependence of the rate of formation of H2 on [MgADP] was inconsistent with the activity arising from MgATP contamination. We conclude that MgATP is not obligatory for H+ reduction by nitrogenase since MgADP supports a very low rate of hydrogen evolution.  (+info)

Bleeding from a tear in the gastric mucosa caused by transoesophageal echocardiography during cardiac surgery: effective haemostasis by endoscopic argon plasma coagulation. (2/204)

We present an unusual complication of transoesophageal echocardiography (TOE) during cardiac surgery. Although the patient had no oesophageal or gastrointestinal disease, a gastric mucosal tear of approximately 2 cm long occurred in the mucosa just distal to the gastrooesophageal junction caused by the TOE probe. Bleeding from the tear was stopped using endoscopic argon plasma coagulation.  (+info)

Influence of oxygen concentration on argon plasma coagulation-induced tissue damage in isolated pig tracheas. (3/204)

BACKGROUND: Argon plasma coagulation (APC) is used during bronchoscopy to restore passage of central airways. Concern has been raised about the possibility that elevated oxygen concentration may increase the tissue damage by APC. OBJECTIVE: to examine the extent of tissue damage at different concentrations of oxygen in isolated pig tracheas. METHODS: The APC-induced tissue damage was investigated macroscopically and microscopically in isolated and artificially ventilated pig tracheas at oxygen concentrations of 21, 50, 75 and 100%. RESULTS: There was deep coagulation of all tissue layers reaching the adventitia independent of the oxygen concentration up to 75% O(2). With 100% O(2), only tissue damage increased and combustion occurred. CONCLUSIONS: APC-induced tissue damage in ex vivo pig tracheas was independent of the oxygen concentration relevant for clinical practice.  (+info)

Solar wind record on the moon: deciphering presolar from planetary nitrogen. (4/204)

Ion microprobe analyses show that solar wind nitrogen associated with solar wind hydrogen implanted in the first tens of nanometers of lunar regolith grains is depleted in 15N by at least 24% relative to terrestrial atmosphere, whereas a nonsolar component associated with deuterium-rich hydrogen, detected in silicon-bearing coatings at the surface of some ilmenite grains, is enriched in 15N. Systematic enrichment of 15N in terrestrial planets and bulk meteorites relative to the protosolar gas cannot be explained by isotopic fractionation in nebular or planetary environments but requires the contribution of 15N-rich compounds to the total nitrogen in planetary materials. Most of these compounds are possibly of an interstellar origin and never equilibrated with the 15N-depleted protosolar nebula.  (+info)

Stereoisomeric specificity and soil gas disequilibria: implications for martian life detection. (5/204)

Variations in the atmospheric composition of soil samples were monitored by mass spectrometry after the addition of mixtures of D- and L-carbohydrates and/or amino acids. The changes in concentrations of CO2 in these experiments were found to be related to the steroisomeric configurations of the compounds with which the soil samples were enriched. The potential of this relationship provides a comparatively simple approach for detecting life in extraterrestrial soils.  (+info)

[Is argon plasma coagulation an efficient treatment for digestive system vascular malformation and radiation proctitis?]. (6/204)

BACKGROUND AND AIMS: Argon beam coagulation is an innovative no-touch electrocoagulation technique in which high-frequency monopolar alternating current is delivered to the tissue through ionized argon gas. The aim of this prospective study was to evaluate the efficacy and safety of argon plasma coagulation (APC) for the treatment of hemorrhagic digestive vascular malformations and hemorrhagic radiation proctosigmoiditis. METHODS AND PATIENTS: From March 1998 through April 1999, we used endoscopic APC (ERBE, Lyon, France, argon gas source ICC 300, high-frequency electrosurgical generator ICC 200, gas flow 1 L/min, power setting 50 W) to treat 39 consecutive patients (mean age 70.3 +/- 10 years). The indications for treatment were anemia (n =10), active or oozing haemorrhage (n =15) from digestive angiodysplastic lesions (n =25), hemorrhagic antral telangiectatic vascular lesions (n =2), and hemorrhagic radiation proctosigmoiditis (n =12) after failure of medical treatments (5-aminosalicylic acid, corticosteroids, or sucralfate enemas). The efficacy of APC treatment was evaluated on symptoms, transfusion requirement, bleeding recurrence, hemoglobin value before and 6 months after APC therapy. RESULTS: On the average, 1 +/- 0.5 sessions per patient was required to treat digestive vascular malformations. Definitive haemostasis of digestive angiodysplastic lesions with active or oozing haemorrhage was achieved in one session in all patients. No bleeding recurrence was observed during the follow-up period of 6 months. Anemia recurrence was observed in 2 patients (7%). Average hemoglobin levels recorded before and 6 months after APC therapy were 78.8 +/- 21.2 g/L and 108 +/- 13.7 g/L, respectively (P<0.05). On the average, 2.8 +/- 0.8 sessions per patient were required to treat hemorrhagic radiation proctosigmoiditis. Ten patients (83%) reported improvement or cessation of rectal bleeding, most of them immediately after APC therapy. Endoscopic control was performed one month after APC therapy and showed complete disappearance of lesions in 8 patients (66%). Average hemoglobin levels recorded before and 6 months after APC therapy were of 102.7 +/- 21 g/L and 120 +/- 19.5 g/L, respectively (P <0.05). Complications were observed in 5 cases (13%): pneumoperitoneum in 2 cases, chronic rectal ulcerations in 2 cases, and nonsymptomatic rectal stenosis in 1 case. CONCLUSION: APC appears to be a simple, safe, and effective technique in the management of hemorrhagic radiation-induced proctosigmoiditis and hemorrhagic lesions.  (+info)

Impact event at the Permian-Triassic boundary: evidence from extraterrestrial noble gases in fullerenes. (7/204)

The Permian-Triassic boundary (PTB) event, which occurred about 251.4 million years ago, is marked by the most severe mass extinction in the geologic record. Recent studies of some PTB sites indicate that the extinctions occurred very abruptly, consistent with a catastrophic, possibly extraterrestrial, cause. Fullerenes (C60 to C200) from sediments at the PTB contain trapped helium and argon with isotope ratios similar to the planetary component of carbonaceous chondrites. These data imply that an impact event (asteroidal or cometary) accompanied the extinction, as was the case for the Cretaceous-Tertiary extinction event about 65 million years ago.  (+info)

The microscopic protein structure of the lens with a theory for cataract formation as determined by Raman spectroscopy of intact bovine lenses. (8/204)

Intact bovine lenses have been studied using the polarized Raman spectroscopic technique. A brief theoretical and experimental review of Raman spectroscopy is presented. From the dependence of the Raman depolarization ratio on the propagation direction of the incident radiation we have determined that the uniaxial qualities of the lens result from microscopic anisotropy and have established the quantitative positional correlation of specific chemical bonds with respect to the lens optic axis. In particular, the hydrogen bonded linear CONH groups of the antiparallel beta-pleated sheet are preferentially oriented in directions orthogonal to the lens optic axis. The Raman spectra of intact lenses do not exhibit bands at positions characteristic of either the alpha-helix or the random coil protein structure. The antiparallel beta-pleated sheet protein microstructure and the lens fiber cross-sectional macrostructure exhibit a remarkable similarity. This similarity may be causal and is consistent with the protein concentration of the lens, the birefringent properties observed by both Lenhard and Brewster, the CONH bond angle distribution with respect to the optic axis, and the lens anatomy. It is suggested that cortical cataracts are caused by fluctuations in protein orientational order.  (+info)

Argon plasma coagulation therapy after submucosal injection of normal saline solution for local recurrence of large nonampullary duodenal neoplasmArgon plasma coagulation therapy after submucosal injection of normal saline solution for local recurrence of large nonampullary duodenal neoplasm ...
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In the present study, Argon laser photocoagulation showed a good prognosis similar to surgical direct cyclopexy in small-size cyclodialysis cleft below 1.5 clock-hours. No significant differences in preoperative and postoperative clinical characteristics were shown between Argon laser photocoagulation group and surgical direct cyclopexy group. Given that the Argon laser photocoagulation is simpler and less expensive than surgical direct cyclopexy, Argon laser photocoagulation would be a better treatment of choice in small-size cyclodialysis cleft.. When the extent of the cyclodialysis cleft is not large, it is possible to wait for spontaneous recovery using conservative treatment. Previously, several reports suggested that conservative medical treatment was effective in small-size cyclodialysis cleft. Ormerod et al. reported that 1 % atropine can help to close the cleft by relaxation of the ciliary muscle to sclera [13]. Joondeph et al. suggested that abrupt cessation of steroid can make ...
Ceana Nezhat, MD, Kimberly A. Kho, MD, MPH, Vadim Morozov, MD Introduction Plasma is often described as the fourth state of matter, consisting of ionized gas in the form of high-energy particles. At low temperatures (variable depending on the material) all matter exists in solid form. As heat is added and temperatures increase, the solid melts into liquid then evaporates into gas. When enough heat is applied to a gas, atoms and molecules are ionized and form plasma (Figure 1). The energy density in the plasma state is much higher than compared to solid, liquid, or gas. When heat is applied to argon gas, one of the noble gases, the electrons and argon ions separate to form pure argon plasma. The PlasmaJet system (Theale, Berkshire, UK) provides an electrically neutral stream of ionized argon gas. A low voltage of approximately 30V ionizes the argon gas thereby producing electrically neutral, high energy argon plasma which is emitted from the tip of the handpiece in a precise jet stream. Possessing
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Giorgio Baretta, PhD, Manoel Galvao Neto, MsC, Josemberg Campos, PhD, Joao Henrique Lima, PhD. Center of Advanced Bariatric Endoscopy - Vita Batel Hospital.. Objective of the Technology: Reduce the dilated gastrojejunal anastomosis in three endoscopic sessions with argon plasma coagulation in patients with weight regain after gastric bypass.. Description of the technology and method: The procedure was performed at three separated sessions of endoscopy by 8 weeks each episode. A flow rate of 2.0 liters per minute and 90W was used. At each endoscopy, the anastomotic diameter was mesured with an articulated device and only patients with 15mm or over were included.. Preliminary Results: Thirty (n=30) patients were included. The percentage average weight regain loss was 89,10%. There was a reduction of 66,89% in anastomotic diameter and all patients at the end of three endoscopic argon sessions showed diameter of 12mm or less.. Conclusions: This method is effective in reducing the weight regained ...
It is important when welding metals such as stainless steel, titanium and zirconium that the welding zone is purged of oxygen even as low as 10 parts per million (ppm) before, during and immediately after welding, in order to achieve a clean, oxide free, zero colour weld.. Huntingdon Fusion Techniques HFT® now manufactures tailor made Argon Gas Feed Hose assemblies with leak tight fittings to attach immediately to their Argweld® range of Inflatable Tube and Pipe Weld Purging Systems at one end and to the gas source at the other. Luke Keane, Distributor Support for HFT® said: "These special, high quality Argon Gas Feed Hoses, which can also be used for transporting nitrogen come complete with end fittings, providing welders with a guaranteed leak tight method of feeding non contaminated argon gas to their weld zone." A selection of leak tight end fittings are provided for attaching an argon gas regulator to at one end and a 12 mm to 12 mm quick connect fitting as standard at the other end, ...
The team assessed 96 patients who underwent endoscopic argon plasma coagulation with adequate acid suppression .. Acid suppression was obtained through a continuous omeprazole therapy in 50 patients, or through laparoscopic fundoplication in 46 patients.. The team observed that complete ablation was achieved in 94 patients who underwent follow-up.. Endoscopic and histological examinations were performed every 12 months.. The researchers noted that the median follow-up of the patients was 36 months.. The team observed a recurrence of intestinal metaplasia in 18% of patients, with an annual recurrence rate of 6%. The researchers found neither dysplasia, nor adenocarcinoma during the follow-up.. After further analysis, the team found that previous laparoscopic fundoplication was associated with a reduced recurrence rate of intestinal metaplasia.. Dr Ferraris team commented, The long-term recurrence of intestinal type Barretts esophagus was low after complete ablation with argon plasma ...
The efficacy for the euthanasia of day-old chicks of mixtures of carbon dioxide and air, or carbon dioxide and argon containing 1, 2 or 5 per cent residual oxygen, or argon containing 1 or 2 per cent residual oxygen was tested in three experiments. The time to the onset of unconsciousness of individual chicks, determined from the time to loss of posture, was similar during their exposure to 2 per cent oxygen in argon, 20, 30 or 40 per cent carbon dioxide in argon with 2 per cent residual oxygen, or 90 per cent carbon dioxide in air. The exposure of chicks in batches of 20 to a mixture of 20, 30 or 40 per cent carbon dioxide in argon resulted in the death of all the chicks within two minutes. However, a residual oxygen level of 5 per cent in these mixtures resulted in the survival of some chicks for longer than two minutes. With argon alone the level of residual oxygen was critical; less than 2 per cent was essential to achieve 100 per cent mortality within three minutes, and a rise from 2 to ...
A glass sunroom may be known for its spaciousness and natural glow, but not necessarily for its energy efficiency. Until recently, sunrooms have not always been the most energy efficient structures in existence, but recent glass technology is available to make your sunroom as energy efficient as it is beautiful.. Sunsational Sunrooms of Georgia offers glass sunroom construction with argon filled glass. Argon filled glass is perfect for our customers in the greater Atlanta, Georgia area because it prevents outdoor temperatures from seeping into the sunroom. Therefore, you can control the climate inside your sunroom without having to pay a small fortune in electric bills.. When you order a glass sunroom with LowE ( LoE ) squared glass from Sunsational Sunrooms of Georgia, argon filled glass comes standard. Argon filled glass is formed with two panes, or sheets, of glass that are parallel to one another, with a space in the middle. Within that space, argon gas is inserted and permanently sealed ...
The argon gas in a window is only temporary as it dissipates over time. The rate at which it dissipates is a question that will garner different answers depending on whom is asked. Some say argon leaves a window at a rate of 10% per year whereas others may say 5-8%. And yet another answer…
The potential of high efficiency zero-emission engines fueled by hydrogen, which is regarded as a promising form of energy for the future, is being researched. The argon circulated hydrogen engine [ 1 ] is one system theoretically capable of achieving both high efficiency and zero emissions, and its feasibility for use in vehicles has been studied. Specifically, tests were performed to verify the following issues. It was examined whether stable hydrogen combustion could be achieved under an atmosphere of argon and oxygen, which has a high specific heat ratio, and whether the substantial thermal efficiency improvement effect of the argon working gas could be achieved. An argon circulation system was also studied whereby steam, which is the combustion product of the hydrogen and oxygen emitted from the engine, is separated by condensation to enable the remaining argon to be re-used. In addition, the study also examined whether gas impurities accumulated in the circulation gas during continuous ...
Gaithersburg, MD , Posted on September 30th, 2011. Small and high aspect ratio silicon structures can now be easily and more rapidly fabricated in the NanoFab using fluorinated plasma chemistry that is inherently isotropic. Directly adding argon to a typical SF6/C4F8 plasma primarily causes dilution and reduces the etch rate. By alternating the etch step with an argon-only step, both high selectivity and high etch rates were obtained while maintaining anisotropic etching. In a deep silicon etch, C4F8 is used to protect the Si sidewalls and SF6 is used to etch. Mixing argon with the etchant gases provides very limited or no improvement to the etch rate due to dilution. However, alternating argon surface bombardment steps with the chemical etch steps results in a four-fold increase in the silicon etch rate while maintaining vertical sidewalls. The silicon etch rate increases with the argon step time, independent of the SF6 step time, and the argon bombardment step is rate-determining. It ...
Buy Argon v10, Upgrade from Argon v8, Digital delivery by Ashlar Inc.. Digitally delivered upgrade from Argon v8 to Argon v10. MPN: 8059. We are an authorized reseller. Price $304.00
Synthetic implants are being used to restore injured or damaged tissues following cancer resection and congenital diseases. However, the survival of large tissue implant replacements depends on their ability to support angiogenesis that if limited, causes extrusion and infection of the implant. This study assessed the beneficial effect of platelet-rich plasma (PRP) and adipose-derived stem cells (ADSCs) on synthetic biomaterials in combination with argon plasma surface modification to enhance vascularisation of tissue-engineered constructs. Non-biodegradable polyurethane scaffolds were manufactured and modified with plasma surface modification using argon gas (PM). Donor rats were then used to extract ADSCs and PRP to modify the scaffolds further. Scaffolds with and without PM were modified with and without ADSCs and PRP and subcutaneously implanted in the dorsum of rats for 3 months. After 12 weeks, the scaffolds were excised and the degree of tissue integration using H&E staining and Massons
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When it comes to window insulation there are many ways in which argon gas is beneficial. Read the following post to learn more on this subject.
Argon is a chemical element. The symbol for argon is Ar, and its atomic number (or proton number) is 18. It is a noble gas and no electrons or protons can be lost or gained from this atom. Argon atoms are found in air. About 1% of the Earths atmosphere (the air around us) is argon. ...
Argon Medical Devices, Inc,. a leading global manufacturer of specialty medical devices used in interventional procedures, announced today that it has entered into a definitive license agreement with Hatch Medical, L.L.C. ("Hatch Medical") for exclusive global rights to market and distribute the Scorpion™ TIPS Access Systems.. "We are excited about the addition of the Scorpion TIPS Access Systems to our product portfolio. This technology is positioned to become the leader in this disease segment and we are confident it will prove to be the preferred device of its kind," said George A. Leondis, President and CEO of Argon Medical Devices, Inc. "This partnership provides a compelling strategic opportunity for Argon, allowing us to provide our customers with another best in class product in the Interventional arena.". "We are pleased to have secured such a strong partner for this procedure-changing product line. Argon Medical is recognized as a world class manufacturer with tremendous depth and ...
BOC offers a range of high purity Argon to suit your application and process needs. N6.0 Argon 99.9999% Minimum Purity. 10.5m3 Research Grade Argon 99.9995% minimum purity. Zero Grade Argon 99.999% minimum purity.
In his article Martin remembers "like it was yesterday" being in the basement of his brothers bike shop, Cycles Gervais Rioux back in 1998. "And only a few days ago, we were at the Tour de France! The most prestigious bike race in the world and one of the most followed sporting contests, of all sports combined, in the whole world. What a path we travelled," he explained.. Rioux watched this years Tour behind the scenes so to speak, from Bora Argon 18s stand as his company supplies the team with bicycles as well as part of the partnership. At the finish line, Martin personally welcomed the five Bora Argon 18 riders who completed the TdF.. The text recounts the experience of riding on the Bora Argon 18 team bus before a difficult stage and partying with Bora Argon 18 after the TdF. There is no hint of rancour as Rioux refers repeatedly to his brother and the other team owners only in a positive light.. He emphasized to Pedal that he remains a shareholder and will continue to sit on the board of ...
Non-thermal (cold) plasma is subject of intensive scientific interest as an alternative sterilization technique for advanced control of microbial quality and safety in food biotechnology. The cold plasma is a flow of weakly ionized gas at atmospheric pressure that includes radicals, H2O2, O3, ultraviolet radiation, charged particles, exited metastable atoms, electric fields. One of the major benefits of plasma-based technologies is the synergy between the strong effects of these highly active components that provides a high bactericidal efficiency at low costs, time-saving and non-toxicity. The aim of this study is to assess the bactericidal effect of cold argon plasma in liquids and surfaces, contaminated with Gram-negative and Gram-positive spore-forming bacteria. The used plasma source is surface-wave-sustained discharge (SWD) operating at 2.45 GHz in argon (plasma torch) produced by an electromagnetic wave launcher surfatron type. The bactericidal effect was studied by direct contact treatment of
The use of argon as an environment for the dc arc results in marked prolongation of volatilization, increased initial electrode currents, and enhancement of lines of many elements, particularly volatile ones, when samples are burnt to extinction and compared to helium and argon-helium mixtures. An interdependent relationship between total time necessary for complete volatilization of samples, percentage helium and argon composition of the atmosphere, and sample concentrations is demonstrated. Independently, a relationship between the electrode current, percent helium and argon, and concentration of the sample exists.. © 1952 Optical Society of America. Full Article , PDF Article ...
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Iron vapors were cocondensed with various cyclic hydrocarbons in excess argon and the FTIR matrix spectra were measured. For mixtures of iron and cyclopentadiene in argon, a spontaneous reaction occurred to form cyclopentadienyliron hydride, the first cyclopentadienyl transition metal hydride ever observed. On condensation of iron with benzene, complexes of various stoichiometry were formed. Photolysis of these complexes did not lead to any oxidative-addition production. Depositing iron with cycloheptatriene in excess argon led to the formation of an adduct, which upon photolysis of UV light rearranged to form a simple bond-insertion product, cycloheptatrienyliron hydride; no evidence was seen for the formation of the aromatic tropylium cation, C$\sb 7$H$\sb {7}\sp{+}$. When the two isomers of cyclohexadiene (CHD) were codeposited with iron, adducts were formed for both isomers. Upon photolysis with UV light, the monoiron-CHD adducts rearranged in a dehydrogenation reaction, forming FeH$\sb 2$ ...
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0083]A 2 cm×3 cm polyether imide (hereinafter referred to as PEI) film substrate (thickness 50 μm) was placed in a separable glass container with a cock, and deaerated therein, whereafter the interior of the glass container was purged with an argon gas. In this state, the PEI film substrate was irradiated with γ-rays from a 60Co radiation source at a radiation dose of 30 kGy at room temperature. Then, 20 g of a 1-propanol solution of 50 wt. % styrene, which had been deaerated by bubbling an argon gas, was added into the glass container so that the irradiated PEI film substrate would be immersed. After purging with an argon gas, the glass container was hermetically sealed, and allowed to stand for 24 hours at 80° C. The resulting graft polymer film substrate was washed with cumene. The degree of grafting was calculated from the weight of the film substrate after drying. This grafted PEI film substrate was fixed to an irradiation stand and, in this state, irradiated with electron-beams (30 mA, ...
The investigators have used the Medtronic ATS cryoprobe (Argon based) since 2009 for cryomaze procedure for treatment of atrial fibrillation combined with valvular heart disease.. However, sometimes, it was inconvenient due to excess flexibility, wide lesion related to excess low temperature and time-consuming detachment from atrium after cryoablation. The investigators introduced Atricure cryoprobe (Nitreos Oxide based) in hope of overcoming these shortcomings of ATS probes last year.. Up to date, the investigators have been satisfactory in terms of the surgical convenience. On the other hand, we have the questionability of transmural lesion of Atricure probe because of the higher temperature of Atricure probe compared with ATS probe.. The aim of this study is compare the surgical convenience and early and long-term outcomes of cryomaze procedure using nitrous oxide with using Argon gas.. The investigators will analyze the pathologic findings of atrial tissue after cryoablation using two probes ...
Why settle for one beam when you can get more? The Argon Laser Putter ($70) utilizes a three-laser system to help improve your game on the green. The three-laser setup allows for better alignment and read of the terrain using two lasers positioned at ground level and the third in the middle of the club face. The Argon is also powered by one 9-volt battery giving off a brighter beam compared to other laser guided putters running on tiny watch batteries. [source ...
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Shields for manual welding are small and light in weight and easily fit onto TIG/GTAW of Plasma/PAW manual welding torches.. The Trailing Shield® is connected to an argon gas source and when the weld is started, it has extra argon flooding to the sides of the weld and covering the heat affected zone adjacent to the weld. As the welding torch is moved forward, because of the length of the Trailing Shield®, the weld remains under a cold argon gas shield until the welded metal has cooled below its oxidation temperature.. For manual welding, the welder finds that with this lightweight and low cost tool, there is no difficulty with the shield following the torch along the surface being welded. One further benefit is that it carries the welding torch at 90º to the weld. The HFT Argweld® range of trailing shields have a series of variable mesh layers integrated into the body that provide a smooth laminar gas flow into the protected area to prevent any air being drawn in from outside.. In addition, ...
D7649-19 Standard Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography/Mass Spectrometer Analysis water content~ argon content~ carbon dioxide content~ nitrogen content~ oxygen content~ GC-MS~
Lead by E. Bruce Watson, Institute Professor of Science at Rensselaer, the team has found strong evidence that argon atoms are tenaciously bound in the minerals of Earths mantle and move through these minerals at a much slower rate than previously thought. In fact, they found that even volcanic activity is unlikely to dislodge argon atoms from their resting places within the mantle. This is in direct contrast to widely held theories on how gases moved through early Earth to form our atmosphere and oceans, according to Watson.. Scientists believe that shortly after Earth was formed, it had a glowing surface of molten rock extending down hundreds of miles. As that surface cooled, a rigid crust was produced near the surface and solidified slowly downward to complete the now-solid planet. Some scientists have suggested that Earth lost all of its initial gases, either during the molten stage or as a consequence of a massive collision, and that the catastrophically expelled gases formed our early ...
A process for determining the amount of argon contamination present in high purity oxygen employing a combination apparatus including a gas chromatography apparatus, a pressure swing adsorption apparatus, and a conduit connecting the two apparatus to each other. The gas chromatography apparatus can be run with its column at about 70 F. (21.1 C.) or higher. A sample of the high purity oxygen is fed to the pressure swing adsorption apparatus, where a portion of the oxygen is removed, and then the thus modified sample is fed through the conduit to the gas chromatography apparatus. Since some of the oxygen has been removed with the pressure swing adsorption apparatus, the graph generated by the gas chromatography apparatus shows 2 resolved peaks, namely a small argon peak preceding a large oxygen peak, even though the column of the gas chromatography apparatus is not being cooled to cryogenic temperatures with a cryogen. Also, instead of first subjecting the high purity oxygen to the pressure swing
While argon fills are available at many technical facilities, they can easily be done as a transfill from an industrial cylinder to a pony bottle with a gas transfer whip.. Common inflation tanks that are used in the US range from 4 to 14 cubic feet volume of compressed gas (1 ft3 = 28.3 Liters) and 2015 psi to 3000 psi working pressures (14.7 psi = 1 Bar). Small tanks help streamlining, but they require a booster to fill completely. On the other hand, relatively large low pressure tanks can support multiple dives on a transfill at even a few 100-psi (or 10s-of-Bar).. If you contemplate the number of pre-filled small suit inflation bottles that would be required to support an extended dive trip, this will encourage DIY style self-sufficiency. Figure 2 shows a photo of a gas transfer whip that I made from old regulator parts, and hardware from McMaster-Carr. Airspeed Press has good references to help you set up your own fill capabilities. The North American CGA #580 fittings for industrial argon ...
Ozone er kommet med en ny Argon Ocelote World Gaming Mouse, der bliver tilg ngelig i butikkerne verden over den 12. januar. Musen blev f rste gang fremvist den 7. december. Den nye Ozone Argon Ocelote World Gaming Mouse har en 8200 DPI laser sensor, der kan ndres on the fly i trin fra 100 DPI og op efter, med standard v rdier p 800, 1800, 4000 o
Tes La Rok returns to Argon with Ignition (VIP Mix) - a new mix of his classic tune which was featured with Round the World Girls on Argon 11. On the flip-side, Internationalz is aptly named. Tes La Rok was one of the first international names to break through in the scene. Buy this record and listen to the future! Tracks: A1: Ignition (VIP Mix) B1: Intanationalz
TM 9-4940-568-20 9-3 (3) Turn handle (5) on argon regulator (6) clockwise to ensure valve is closed and excess argon is bled from hose (7). Hose reel assembly is under pressure. Avoid releasing latching mechanism during removal and installation. Failure to comply could result in injury to personnel. (4) Layout entire length of hose (7) from hose reel assembly (8). (5) Remove four locknuts (9), washers (10) and two clamps (11) from hose reel assembly (8). Discard locknuts. (6) Remove hose (7), elbow fitting (12) and adapter (13) from swivel assembly (14). 5 6 12 8 13 14 7 9 10 11 7 ...
Argon Medical Gadgets, Rex Medical announce licensing agreement for Cleaner Rotational Thrombectomy System Argon Medical Products, Inc. Cleaner is usually a medical device designed for the mechanical declotting of occluded indigenous vessel dialysis fistulae and artificial dialysis access grafts. Related
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Just as a quick update: the first revisions of Argon user guide on wiki and Granity software shall be ready during this week which finally allows the real utilization of the drives. Stay tuned!. In the other news: manufacturing of the next batch of Argons has been scheduled for this week, too. We should have more units available for shipping by the end of the next week (but Im optimistic about it: could happen even on this week)!. ...
The market study on Global Argon Market 2017 Research Report studies current as well as future aspects of the Argon Market primarily based upon factors on which the companies compete in the market, key trends and segmentation analysis. This report covers each side of the worldwide market, ranging from the fundamental market info and advancing […]. ...
The market study on Global Argon Market 2017 Research Report studies current as well as future aspects of the Argon Market primarily based upon factors on which the companies compete in the market, key trends and segmentation analysis. This report covers each side of the worldwide market, ranging from the fundamental market info and advancing […]. ...
Osprey Argon 85 Pack - An extended trip backpack. Create a custom fitting backpack with the Osprey Argon 85 Pack. This pack is built with the quality you
En France, Argon.org est classé 1 180 183, avec un nombre de visiteurs mensuels estimé à 851. Cliquez pour voir dautres données concernant ce site.
Data & statistics on Control of gas flow rate: I Suited as a manually operated variable leak valve to roughly control gas flows, Procedures: Make a leak free connection between the hand pump and the gas sampling chamber. Control gas flow from source using flow control valve and purge the chamber for 1 minute Connect a fresh detector tube to the pump, insert assembly into chamber, and pump the specified volume of gas through the tube. Read the moisture content on the tube and record below. Record the date, time, volume samples, ..., Example of computer simulation envelope results for some H- beams. An analysis of the application of different chargeexchange target gases was made and argon gas target was chosen for use. The charge-exchange target is a pipe with an inner hole of 10 mm diameter and ~ 400 mm length. Argon gas leaks in the center of the pipe. Systems for controlling gas flow of the gas stripper target, and processing ......
We report TOFMS investigations on the effects of hydrogen added to a dc GD argon plasma, in detail over the most likely concentration range occurring in analytical work (0-0.10% v/v), together with an overview to 0.8% v/v; typical GD-OES discharge conditions were used. Many previous studies on the effects of hydrogen in analytical GD-MS used much higher hydrogen concentrations. In this paper, we report for the first time the hydrogen effect on relative ion signal intensities of matrices, plasma and added gas, for very low but analytically important hydrogen concentrations. We investigate the behavior of doubly charged argon ions (Ar++), dimer ions (Cu2+, Fe2+, Ti2+, Ar2+) and polyatomic ions (ArH+, CuH+, FeH+, TiH+), which can play important roles in plasma processes. We discuss the probable discharge mechanisms in order to gain a greater understanding of the fundamental processes involved in the ionization of the species observed in this study and their likely effects on analytical results. ...
For the first time, scientists have trapped a noble gas in a two-dimensional porous structure at room temperature. This achievement will enable detailed studies of individual gas atoms in confinement -- research that could inform the design of new materials for gas separation and nuclear waste remediation ...
Using the basic moment equations (number density, flow density, and energy density) for singly ionized argon and for electrons, a simple diffusion equation
The objective of this study was to determine the efficiency of an argon laser in polymerizing a light-cured orthodontic adhesive. Metal brackets were bonded to 185 premolars, divided into 5 different protocol groups of 37 each as follows: light 40-se
The report focuses on Europe major leading industry players providing information such as company profiles, product picture and specification, capacity, production, price, cost, revenue and contact information. Upstream raw materials and equipment and downstream demand analysis is also carried out. The Argon Lasers industry development trends and marketing channels are analyzed. Finally the feasibility of new investment projects are assessed and overall research conclusions offered ...
... ,The Ultima 2000 SE is flexible in meeting the needs of both office and operating room use. It is the answer for the clinical practice with a wide range of ophthalmic demands looking for minimal risk of obsolescence.,medicine,medical supply,medical supplies,medical product
The interaction of the components in electrothermal chemical (ETC) ignition have been studied due to its advantages over conventional ignition. In ETC ignition, a piece of polyethylene replaces the primer found in conventional ignition. The plastic is attached to a large capacitor that when high transient current results, due to the high temperature, the plastic dissociates into ions, radicals, electrons, and light. The individual and synergistic effects of these components have been studied and are presented in this dissertation. Erosion rates of RDX films have been measured under a variety of conditions. Experiments were performed to understand the roles of light, electrons, argon ions, hydrogen ions, and hydrogen radicals. The most significant erosion rate was found in high-energy hydrogen plasmas where the synergistic effect of ions and radicals appeared to be the greatest contributor. The roles of ions and radicals were investigated further through exposing RDX films to mixed hydrogen-argon ...
Winter is a time you can more often notice your old windows are failing. You can feel drafts, notice heat loss and the harsh conditions highlight signs of aging or rot.. If you notice problems with drafty windows or feel you are paying too much for the heat in your home to let it escape through your windows, dont wait to get replacement windows. Continue reading →. ...
To the Editor.-We read with great interest the article by Johnson et al1 in the May 1989 issue of the Archives. The authors list, as possible causes of the tran
Beta carbon nitride (β-C3N4) is a superhard material predicted to be harder than diamond. The material was first proposed in 1985 by Marvin Cohen and Amy Liu. Examining the nature of crystalline bonds they theorised that carbon and nitrogen atoms could form a particularly short and strong bond in a stable crystal lattice in a ratio of 1:1.3. That this material would be harder than diamond on the Mohs scale was first proposed in 1989. The material has been considered difficult to produce and could not be synthesized for many years. Recently, the production of beta carbon nitride was achieved. For example, nanosized beta carbon nitride crystals and nanorods of this material were prepared by means of an approach involving mechanochemical processing. Through a mechanochemical reaction process, β-C3N4 can be synthesized. This method is achieved by ball milling high purity graphite powders down to an amorphous nanoscale size while under an argon atmosphere, then the argon is purged and the graphite ...
A molecular dynamics simulation has been used to study the times at which atoms are ejected during sputtering events. Plots of the atom ejection time versus distance from the impact point indicate that many sputtering events occur along a roughly circular front that propagates outward at hypersonic speed.. ...
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A free platform for explaining your research in plain language, and managing how you communicate around it - so you can understand how best to increase its impact.
argon definition - A noble gas which comprises approximately 0.93% of air by volume, and whose atomic number is 18. It has about 15 known isotopes, of which 3 are stable. It has ...
Argon 18 Krypton X-Road Ultegra 11 available to buy online from Cookstown Cycles. Browse the full range online and enjoy free UK delivery.
Mesa Gas is a specialty gas supplier. BTU and RGA nitrogen, carbon dioxide hydrogen gas cylinders. BTU Gas Mixtures, RGA Mixture Cylinders, 20L, 14L Nitrogen, CO2, Argon, Hydrogen Cylinder
G Series compressors and boosters for Nitrogen, Helium and Argon are available in a wide variety of capacities for a multitude of applications
I have a can of Bloxygen and use it sometimes when closing up a can if Im in a hurry but usually Ill flow argon from my MIG welder in since its a lot less expensive. Nitrogen will work but its less likely to me that all moisture will be excluded when using nitrogen since the
Ti-13Nb-13Zr is a new titanium alloy that was originally developed for medical implant applications. This alloy combines a low elastic modulus, high strength, excellent hot and cold workability, and superior corrosion resistance. Research on this alloy has shown that the mechanical properties can be controlled over a significant range through hot working, heat treatment and cold-working. The present study describes the mechanical properties and cytotoxic evaluation of the Ti-13Nb-13Zr alloy, which was produced by furnace arc melting in argon atmosphere. The elemental constituents were unalloyed Ti, Nb and Zr sheets. The obtained ingots, which initial diameter were about 15 mm, have undergone sequences of cold-working and heat treatments in order to achieve a final diameter of 6 mm. The tensile strength of Ti-13Nb-13Zr achieved 1270 MPa (cold-worked - 60% reduction in area) and 860 MPa after heat treatment (60% reduction in area + 1000 o C/1h + water quenched). The elastic module were 52 GPa and ...
In this work, the primary investigation has been on the development of the laser pyrolysis setup and its optimization for the synthesis of nano-size VO2-x films. More specifically the focus was on making VO2-x depositions using various laser pyrolysis parameters and establish in this way (1) an optimum laser wavelength threshold for the photon induced dissociation of the molecular precursors while the thermal contribution was kept minimal by using low power density (laser energy of 30 W) and (2) the lower threshold for pure thermal contributions by working with wavelengths far from resonance in order to minimize pure photon induced contributions. The interest in synthesizing nano-size VO2-x materials stems from the low metal-insulator transition temperature at near room temperature with opto-electronic and thermo-electronic properties that can be used in specialised applications. A large number of samples were synthesized under various conditions and annealed under argon atmosphere for 17 hours. ...
D. 1-(4-tert-Butylcyclohexen-1-yl)-2-propen-1-one. To a dry, 2-L, round-bottomed flask, equipped with a magnetic stirring bar, a condenser, and a gas inlet connected to a static argon atmosphere (Note 1), are added 1.12 g (0.968 mmol) of tetrakis(triphenylphosphine)palladium(0) (Note 15), 13.2 g (0.312 mol) of lithium chloride (Note 16), and 500 mL of tetrahydrofuran (Note 10), followed by a solution of 28.6 g (0.100 mol) of 4-tert-butylcyclohexen-1-yl trifluoromethanesulfonate and 19.1 g (0.100 mol) of trimethylvinyltin in 250 mL of tetrahydrofuran, and then an additional 250 mL of tetrahydrofuran. A gas bag (Note 19) filled with carbon monoxide is attached to the gas inlet and the apparatus is flushed with carbon monoxide. The gas bag is refilled with carbon monoxide and reattached to the gas inlet. The mixture is then heated to 55°C (Note 20). After 2-4 hr, a large amount of the carbon monoxide has been absorbed into solution and the gas bag is refilled and reattached to the gas inlet. After ...
For the TEM specimen preparation, a small aliquot of the C-S-H dispersion was transferred on a copper formvar/carbon grid in argon atmosphere by blotting with a filter paper. The C-S-H crystals were pestled, dispersed in absolute ethanol, and blotted onto a TEM grid. The TEM used was a Zeiss Libra 120, which operates with a 120-kV LaB6 emitter with Koehler illumination and a resolution of 0.34 nm.. For cryo-TEM, an aliquot of the colloidal solution was spread on a lacey carbon grid by blotting with a filter paper. The resulting thin film was vitrified by quickly plunging the grid into liquid ethane at its freezing point. Specimens were examined at temperatures around 90 K. Collected images were processed with a background subtraction routine, and where appropriate, a smoothing filter was applied to reduce noise. The measurements were performed at the University of Bayreuth with a Zeiss EM922 EF microscope, operated at 200 kV, and equipped with a Gatan CT3500 cryo-transfer holder. Images were ...
The compound LaCa2Fe3O8+y, also known as the Grenier phase, is known to undergo an order-disorder transformation (ODT) at high temperatures and oxidation has been observed when the compound is cooled in air after the ODT. In this study, we have synthesized the Grenier compound in air using traditional solid-state reactions and investigated the structure and composition before and after the ODT. Thermal analysis showed that the material undergoes an ODT in both oxygen and argon atmospheres with dynamic, temperature dependent, oxidation upon cooling. Results from scanning transmission electron microscopy (STEM) suggest that the Grenier phase has preferential segregation of Ca and La on the two crystallographic A sites before the ODT, but a random distribution above the ODT temperature. Furthermore, STEM images suggest the possibility that oxygen excess may exist in La-rich regions within microdomains rather than at microdomain boundaries.
transitions in the visible and the near-infrared regions. The isotope shifts were determined by saturation spectroscopy, and the measurements were effected by use of a standard error of approximately 1 MHz. Combining our spectroscopic measurements with the nuclear charge radii available from muonic transitions, we were able to extract the specific mass and the volume contributions to the isotope shift. In all the investigated transitions we observed a field shift contribution that is surprising for a light element like argon. Moreover, for ...
This page provides comprehensive nuclide information for the element element Ar - Argon including: nuclide decay modes, half-life, branch ratios, decay energy, etc.
Way, AS, Jeynes, C and Webb, RP (1999) Measurement of lateral stress in argon implanted thin gold films using quartz resonator techniques In: 11th International Conference on Ion Beam Modification of Materials (IBMM98), 1998-08-31 - 1998-09-04, ROYAL TROP INST, AMSTERDAM, NETHERLANDS. Full text not available from this repository ...
Sierra Instruments is a leader in providing flow solutions for the Argon Mass Flow Meters industry. Read how our meters and controllers provide flow solutions to increase efficiency and your profitability.
Find Argon Arc Welding from Lemo Precision Metal. Under strict quality control system and management system, our products come in high quality and hgih accuracy. Offering good after-sales service and fast delivery, we warmly welcome you to check the quotation with us.
ARGON, C02. The most accurate way to measure welding gas is by using a bobbin flow meter.. Machined from solid brass these flow meters feature a clear flow tube with bold markings making reading the flow rate easy. ...
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Company Information. Company affiliated to: BGMEA. Address: Evitex Fashions Limited. Shirirchala, Bagherbazar, Gazipur.. Number of employees: 4443 (1547 women, 2896 men). Number of industrial plants: 6. Main products: Woven/ Spinning. Training details. Date:18/08/2015. Duration: 4.5 hours. Thematic areas: Fire Safety, Electricity, Good housekeeping: trip, slip and fall, First Aid, PPE. Training venue:in-house. Number of participants: 24 (18 men, 06 women). Trainers: Quhelee Jinath Jhumu, Asst. Secretary (Safety), BGMEA & Jakir Ahmed, Executive (Safety), BGMEA. Focal point at company level: Md. Afjal Hossain, A.G.M (HR, & Personal) , Mobile: +8801713067737. List of actions and proposals to improve OSH conditions - as emerged at the end of the training:. ...
Facts about Argon present the information about the third element in periodic table. The symbol is Ar. It is located in the third element of the 18th column.
Angiotech Pharmaceuticals Inc. will sell its interventional products business to private equity-backed Argon Medical Devices Inc. for $362.5 million to pay off its debts and generate revenue, the medical device manufacturer said Monday.
Whether racing or climbing on flowing single tracks, it will help you to be quick and save energy. ARGON 650B is all about light weight. A truly perfect combo for fun and performance on the trail!. ...
Whether racing or climbing on flowing single tracks, it will help you to be quick and save energy. ARGON 29 is all about light weight. A truly perfect combo for fun and performance on the trail!. ...
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Here is another freebie from Von D, about 2 weeks ago we linked you two of his other Argon releases that never made it to digital, so here is another we found on his soundcloud recently :D Enjoy the Download and make sure to follow his soundcloud at https://soundcloud.com/vond Von D - Berlin Call - ARG027B ...
Argon STs CFO Aaron Daniels spoke recently with ExecutiveBiz about some misconceptions in the CFO role:. "I think people think of CFOs as being responsible for the finances. They think CFOs are only responsible for keeping the books and the bean counting. As businesses evolve they become incredibly complex and interconnected. CFOs are not siloed like they used to be way, way, way back where the finance guy could just sort of sit in his or her office and just do finance and accounting. Many aspects of the business are interdependent. To get a bid out the door as a government contractor, for example, involves an incredible number of people not just business development people. You have to make sure you are going to make money, you are going to make the money that you think is appropriate, you are going to have to ensure that you are being competitive, that you are delivering a quality product, that you have the right supply chain organization underneath it, etc. As CFOs get out there and become ...
PT. Anugrah Argon Medica is a leading pharmaceutical distribution company, and a member of Dexa Medica Group. With a network of 40 branches and sales offices covering every major city in Indonesia, we distribute pharmaceutical, medical devices, and consumer healthcare products. Our principals include local and multinational companies. We strongly believe in our values: Strive for excellent, Act profesionally and Deal with care ...
Find best value and selection for your Serengeti Argon Polarmax 7007 NR Compare at 130 search on eBay. World's leading marketplace.
Hi,. Im investing in a triathlon bike, having made do with a Road bike (Cube) for many years. I have a pretty decent budget (c.£6k) to play with - Ive decided to treat myself as Ive always made do with budget gear!. I went for a professional tri bike fit (at Department of Endurance - they were excellent, Id highly recommend them) and they have recommended the Argon 18 119 (with Zipp 404s) or the Felt IA2. DoE is a registered dealer for both brands so can put them together quite quickly and will reimburse the cost of the fit if I go with either of those models. I was also considering a Canyon Speedmax CF SLX 9.0.. The Canyon seems to me to be the best value of the bunch, and the integrated hydration etc it comes with is definitely appealing as I have an Ironman coming up in August and while Im sure you can add bento boxes and bottle cages to the other two, the Canyon solution seems quite elegant, not to mention aero. With that bike in a large, I would have some room to come down from an ...
Holloway Adult Youth Argon Hoodie. Dry-Excel™ performance fleece is a smooth polyester that dries fast to provide superior comfort and warmth. Matching self cuffs and bottom hem.
Argon Electronics announced on Wednesday that Tim Knight was appointed as business development manager to help develop products and promote CBRN/HazMat training for military and first responders.
Tera Online Entwickler EnMasse Entertainment gab nun den offiziellen Releasetermin des neuen Argon Queen Updates bekannt. Demnach wird der neue Content ab dem 22. August auf den nordamerikanischen Liveservern spielbar sein Wir als Europäer müssen uns jedoch noch etwas gedulden. Laut Publisher Gameforge soll jedoch bis Ende August, spätestens Anfang September der Patch auch in Europa erhältlich sein. Im Zuge der Erweiterung präsentiert EnMasse die neuen Battleground in einem exklsuiven Trailer.. ...
Find your BRADY PIPEMARKER ARGON at Acklands-Grainger. We have been Canadas premiere industrial supplier for over 125 years with superior service and quality.
Diana Argon Wallpapers ,Images ,Backgrounds ,Photos and Pictures In 4k 5k 8k HD Quality for Computers, Laptops, Tablets and Phones
Ashlar Argon v8.0 8003 for $1295.00 at macmall.com. Software - Graphics & Development Software - CAD/CAM Software from macmall.com.
[117 Pages Report] Check for Discount on United States Argon Plasma Coagulation Probe Market Report 2016 report by QYResearch Group. Notes: Sales, means the sales volume of Argon Plasma Coagulation...
Successful treatment of post-intubation tracheal stenosis with balloon dilation, argon plasma coagulation, electrocautery and application of mitomycin C
Purpose: To describe the clinical characteristics and outcome of eyes with extrafoveal polypoidal choroidal vasculopathy (PCV) treated with argon laser. Design: Prospective cohort, noninterventional study. Methods: A prospective study of Asian patients with extrafoveal PCV, confirmed on indocyanine green angiography and treated with argon laser with and without anti-vascular endothelial growth factor (VEGF) therapy. Patients were followed-up over 12 months with visual, angiographic, and structural outcomes recorded. Results: Of the 93 eyes with PCV at baseline, 33 eyes (35.5%) in 31 patients had extrafoveal involvement and were treated with argon laser. Foveal involvement with fluid or blood at baseline was apparent in 23 eyes (69.7%), despite the extrafoveal location of 1 or more polyps. Of these 33 eyes, 12 (36.4%) also received anti-VEGF injections (median, 2.5 injections) over the 12-month period. Two eyes received photodynamic therapy rescue during subsequent follow-up and were excluded for ...
Gastric antral vascular ectasia. Endoscopic view of the antrum (final portion of stomach), affected by gastric antral vascular ectasia (GAVE). GAVE, or watermelon stomach, is associated with painless upper gastrointestinal bleeding. It is treated with laser and cauterisation. Sometimes removal of the distal stomach is necessary. It is not associated with cancer. - Stock Image C025/0085
Approximately half of patients with rectal cancer may be candidates for palliative therapy at some point during their disease process because of locally advanced or metastatic disease or high operative risk.4,7 Treatment strategies as an alternative for palliative surgery for advanced stage rectal cancer include laser ablation, argon plasma coagulation, electrocoagulation, photodynamic therapy, pelvic radiotherapy, chemotherapy, endoscopic stenting, and cryotherapy.7-11 Treatment selection should consider the patients symptoms, age, comorbid conditions, extent of disease, and patient preference.. Endoscopic cryotherapy has been used to control tumor bleeding in the gastrointestinal tract. This technique involves directing freezing nitrogen gas on the lesion during direct visualization, causing immediate and delayed cellular death.6,12 Each mucosal site is generally treated for 20-30 seconds for 2-3 cycles with at least 45 seconds between freezes to allow complete tissue thawing. Endoscopic ...
The relationship between cellular adhesion and surface roughness for polyurethane modified by microwave plasma radiation Saeed Heidari Keshel1, S Neda Kh Azhdadi2, Azadeh Asefnezhad2, Mohammad Sadraeian3, Mohamad Montazeri4, Esmaeil Biazar51Stem Cell Preparation Unit, Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences; 2Department of Biomaterial Engineering, Faculty of Biomedical Engineering, Science and Research Branch - Islamic Azad University; 3Young Researchers Club, Islamic Azad University, North Tehran Branch, Tehran; 4Faculty of Medical Sciences, Babol University of Medical Sciences, Babol; 5Department of Chemistry, Islamic Azad University, Tonekabon, IranAbstract: Surface modification of medical polymers is carried out to improve biocompatibility. In this study, conventional polyurethane was exposed to microwave plasma treatment with oxygen and argon gases for 30 seconds and 60 seconds. Attenuated total reflection Fourier transform infrared spectra investigations of
Editor,-Spahr and colleagues recently published a case series which described the poor response of a haemorrhage from gastric antral vascular ectasia (GAVE) to portal decompression by insertion of a transjugular intrahepatic portosystemic shunt (TIPS) (Gut1999;44:739-742). However, the authors claim that this indicates the absence of a relation between GAVE and portal hypertension is seriously flawed. The failure of this condition to respond to portal decompression cannot exclude a primary role for portal hypertension in the pathogenesis of the disorder. Furthermore, this study would have been more informative if aortoportography-that is, superior mesenteric and splenic angiography with venous phase imaging, had been performed in order to determine the pattern of portosystemic shunting before and after TIPS insertion. The authors have not addressed the question of whether portosystemic shunts supply the vascular lesions of GAVE; it would have been helpful if they had performed angiography in at ...
TY - JOUR. T1 - Surface morphology and light scattering properties of plasma etched ZnO:B films grown by LP-MOCVD for silicon thin film solar cells. AU - Addonizio, M.L.. AU - Antonaia, A.. PY - 2009/12/15. Y1 - 2009/12/15. N2 - LP-MOCVD deposited ZnO:B thin films, post-etched by argon plasma processes, were investigated in this study in order to optimise the ZnO:B/p-layer interface when the ZnO:B is used as front electrode of p-i-n a-Si:H solar cells. At varying etching time different surface roughness was obtained and the evolution of the surface morphology was correlated with the texture characteristic and its scattering properties. Atomic force microscopy data were analysed and discussed together with the scattering properties, which are haze parameter and angular resolved scattering (ARS) distribution. The presence of several preferential scattering angles was hypothesized and a deconvolution approach was applied to each angular scattering curve. For each fixed preferential scattering angle ...
Detection of argon[edit]. Hale-Bopp was the first comet where the noble gas argon was detected.[43] Noble gases are chemically ... "The Discovery of Argon in Comet C/1995 O1 (Hale-Bopp)". The Astrophysical Journal. 544 (2): L169-L172. arXiv:astro-ph/0011327. ... while argon with its higher sublimation temperature was enriched relative to the solar abundance.[43] Together these ... Unless the solar nebula was much colder and richer in argon than generally believed, this suggests that the comet formed beyond ...
Argon 1894 Lord Rayleigh and W. Ramsay 1894 Lord Rayleigh and W. Ramsay They discovered the gas by comparing the molecular ... On July 12, 1898 Ramsay separated a third noble gas within three weeks, from liquid argon by difference in boiling point.[115] ... In June 1898 Ramsay separated a new noble gas from liquid argon by difference in boiling point.[114] ... On May 30, 1898, Ramsay separated a noble gas from liquid argon by difference in boiling point.[114] ...
Argon. 70 ppm. Water vapour. 20 ppm. Carbon monoxide. 17 ppm. Helium. 12 ppm. ...
argon 18 Ar potassium 19 K calcium 20 Ca scandium 21 Sc ...
Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic ... Argon Ar Atomic Number: 18 Atomic Weight: 39.948 Melting Point: 83.96 K. Boiling Point: 87.30 K. Specific mass: 0.0017837. ... This usage is rare, since liquid argon is less expensive. The advantage of krypton is a smaller Molière radius of 4.7 cm, which ... Krypton is mixed with argon in energy efficient fluorescent lamps, reducing the power consumption, but also reducing the light ...
Argon18Ar​39.95 4 Potas-sium19K​39.098 Cal-cium20Ca​40.078 Scan-dium21Sc​44.956 Tita-nium22Ti​47.867 Vana-dium23V​50.942 Chrom- ... Where the major source of argon is the decay of 40. K in rocks, 40. Ar will be the dominant isotope. Such locations include the ... Correspondingly, solar argon contains 84.6% 36. Ar (according to solar wind measurements),[4] and the ratio of the three ... Argon produced directly, by stellar nucleosynthesis, is dominated by the alpha-process nuclide 36. Ar. ...
Argon. Autonomous MPD Thruster Potok 4/Geizer 5 (Kosmos 1888). 1 Oct 1987. Hall effect thruster. 4. SPT-70. Xenon. OKB Fakel. ...
Hydrogen, argon, ammonia and nitrogen can be used as propellant. In a certain configuration, the ambient gas in low Earth orbit ... However, in current tests the most practical propellant is argon, which is relatively abundant and inexpensive. ... VASIMR could in theory use as little as 300 kg of argon gas for ISS station-keeping instead of 7.5 tonnes of chemical fuel - ...
Molecules are quite different from the monatomic gases like helium and argon. With monatomic gases, thermal energy comprises ...
Liquid argon 1.10-1.42[1] Cryogenic. See also[edit]. *Dielectric gas. References[edit]. *^ a b c d e f g h i Naidu, S.; ...
Argon (1908). *Argyll (1899-1928) (1976-1990). *Ariel (1898-1915; 1922-1925) ...
... is used as a refrigerant.[10] The use in refrigerators started in 1993 when Greenpeace presented the Greenfreeze project with the German company Foron.[11] In this regard, blends of pure, dry "isobutane" (R-600a) (that is, isobutane mixtures) have negligible ozone depletion potential and very low global warming potential (having a value of 3.3 times the GWP of carbon dioxide) and can serve as a functional replacement for R-12, R-22, R-134a, and other chlorofluorocarbon or hydrofluorocarbon refrigerants in conventional stationary refrigeration and air conditioning systems. As a refrigerant, isobutane poses an explosion risk in addition to the hazards associated with non-flammable CFC refrigerants. Substitution of this refrigerant for motor vehicle air conditioning systems not originally designed for isobutane is widely prohibited or discouraged.[12][13][14][15][16][17][18] Vendors and advocates of hydrocarbon refrigerants argue against such bans on the grounds that there have been very ...
Argon fluorohydride - HArF. As[edit]. *Arsenic pentafluoride - AsF5. *Arsenic trioxide (Arsenic(III) oxide) - As2O3 ...
Robert Soliday (2006-09-05). "WIGGLER". Argon National laboratory.. Missing or empty ,url=. (help) ...
18 Ar argon use. 87.302 K. −185.848 °C. −302.526 °F WebEl. 87.3 K. −185.8 °C. −302.4 °F ...
Argon Ion laser: 457.8 nm, 476.5 nm, 488.0 nm, 496.5 nm, 501.7 nm, 514.5 nm (multi-line operation possible) ... Argon ion lasers can also operate in multi-line mode. Major disadvantage are high power consumption, generation of mechanical ...
Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic ... that of isotopes heavier than 37Cl is beta decay to isotopes of argon; and 36Cl may decay by either mode to stable 36S or 36Ar. ...
For example, the Linde tank car depicted below[which?] carries liquefied argon. Cars designed for multiple commodities are ...
Argon Merger Sub, Inc. *ArQule, Inc. (Acq 2019). *Themis Bioscience (Acq 2020) ...
Argon flash. *Carbide lamp. *Betty lamp (Defunct). *Butter lamp. *Flash-lamp (Defunct) ...
The device uses argon gas. The device amplifies sound created by the waste heat, and converts the resulting pressure back into ...
Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic ... Ramsay, William; Travers, Morris W. (1898). "On the Companions of Argon". Proceedings of the Royal Society of London. 63 (1): ... Ramsay, William, Travers, Morris W. (1898). "On the Companions of Argon". Proceedings of the Royal Society of London. 63 (1): ... Ramsay, William; Travers, Morris W. (1898). "On the Companions of Argon". Proceedings of the Royal Society of London. 63 (1): ...
Argon. 1288, &c. Pseudo-Apollodorus, Bibliotheca i. 9. § 25, 26 Homer, Odyssey vi. 12, &c., 62, &c Comp. Gaius Julius Hyginus, ...
Argon. 1296; Apollon. Rhod. i. 404. (cited by Schmitz) This article incorporates text from a publication now in the public ...
Rhod., Argon. i.935-1077; Orphica, Argonautica 486ff.; Valerius Flaccus, Argon. ii.634ff., iii.1ff.; Hyginus, Fab. 16. Dinter, ... Rhod., Argon. i.1057-1077. Compare Orphica, Argonautica 571ff.; Valerius Flaccus, Argon. iii.332ff. Argonautica Orphica, 524 ...
Fish; Reid; Argon; Xing-Wu Zheng (2005). "Full-Polarization Observations of OH Masers in Massive Star-Forming Regions: I. Data ...
Electron temperature and density of non-thermal atmospheric pressure argon plasma jet by convective wave packet model, Journal ...
Argon is also used for blue and green argon-ion lasers. Miscellaneous uses[edit]. Argon is used for thermal insulation in ... Also, potassium-argon dating and related argon-argon dating is used to date sedimentary, metamorphic, and igneous rocks.[20] ... Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic ... "Argon (Ar)". Encyclopædia Britannica. Retrieved 14 January 2014.. *^ "Argon, Ar". Etacude.com. Archived from the original on 7 ...
... for certain rocks that depends on the decay of the radioisotope potassium-40 to argon-40, a process with a half-life of about ... potassium-argon dating(K-Ar method) A dating technique based on the radioactive decay of potassium (40K) to argon (40Ar). This ... potassium-argon dating (K-Ar method) Geologic dating technique based on the radioactive decay of potassium (40K) to argon (40Ar ... potassium-argon dating A dating technique for certain rocks that depends on the decay of the radioisotope potassium-40 to argon ...
Colourless, odourless, and tasteless, argon gas was isolated (1894) from air by the British scientists Lord Rayleigh ... Argon (Ar), chemical element, inert gas of Group 18 (noble gases) of the periodic table, terrestrially the most abundant and ... Argon-36 and argon-38 make up 0.34 and 0.06 percent of Earths argon, respectively.) A major portion of terrestrial argon has ... dating: Potassium-argon methods. …fact, potassium-40 decays to both argon-40 and calcium-40, but, because argon is absent in ...
Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.
SOURCE: Argon ST, Inc. Argon ST, Inc.. Investor Contact:. Aaron Daniels, 703-995-5610. [email protected] or. Media Contact:. Lori ... About Argon ST, Inc. Argon ST, Inc. designs, develops, and produces systems and sensors for the Command, Control, ... Argon was initially selected in 2008 by DARPA to develop new and innovative algorithms for mitigating multi-path signal errors ... Argon ST has selected Honeywell Laboratories, Minneapolis, MN; Ticom Geomatics, Austin, TX; and The Charles Stark Draper ...
Argon ST, Inc.. Argon ST, Inc.. Investor Contact:. Aaron Daniels, 703-995-5610. [email protected] or. Media Contact:. Lori Hughes ... Argon ST, Inc.. Argon ST, Inc.. designs, develops, and produces systems and sensors for the Command, Control, Communications, ... Argon ST, Inc. Announces Fiscal Third Quarter Results. Third Quarter Revenues Increase 9.4% to $91 million; Third Quarter ... Argon management offers the following updated guidance for the fiscal year ending September 30, 2009. : * Revenue is ...
Go To: Top, Gas phase thermochemistry data, Ion clustering data, References, Notes. Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved. Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias. Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below. ...
Explore the billions of dollars special interest groups are spending on lobbying in Washington, D.C., -- and on what -- at OpenSecrets.org.
Elkabetz Y, Argon Y, Bar-Nun S.: Cysteines in the CH1 domain underlie retention of unassembled Ig heavy chains. J. Biol. Chem ... Davis DP1, Gallo G, Vogen SM, Dul JL, Sciarretta KL, Kumar A, Raffen R, Stevens FJ, Argon Y.: Both the environment and somatic ... Davis PD, Raffen R, Dul LJ, Vogen MS, Williamson KE, Stevens JF, Argon Y.: Inhibition of amyloid fiber assembly by both BiP and ... Vogen S, Gidalevitz T, Biswas C, Simen BB, Stein E, Gulmen F, Argon Y.: Radicicol-sensitive peptide binding to the N-terminal ...
Kann das ARGON GLF PI auch mit 29 Laufrädern gefahren werden?. Durch die verschiebbaren Ausfallenden kann in der maximal- ... Kann das ARGON GLF PI auch mit einem GATES Riemenantrieb gefahren werden.. Ja, Nicolai empfiehlt ausdrücklich die Verwendung ...
Cam Argon, a.k.a. "Big Chocolate," is nineteen years old, and […] ...
Make research projects and school reports about argon easy with credible articles from our FREE, online encyclopedia and ... Three isotopes of argon exist naturally. They are argon-36, argon-38, and argon-40. Isotopes are two or more forms of an ... Argon is also used in argon lasers and argon-dye lasers. A laser is a device that produces very bright light of a single color ... Argon Chemistry: Foundations and Applications COPYRIGHT 2004 The Gale Group, Inc.. Argon. melting point: −189.3°C. boiling ...
Argon An atom of argon rarely bonds to an atom of another element because an argon atom has. ?. An atom of argon has a ... Argon What statement can be applied to an atom of argon. ?. Argon is a noble gas, argon is highly unreactive ... Argon Is argon an atom. ?. Yes. Because argon is an element the smallest "piece" of it is referred to as an atom. ... Argon How does potassium turn into argon. ?. Potassium element can turn into argon element only by the emission of a beta ...
Find best value and selection for your Serengeti Argon Polarmax 7007 NR Compare at 130 search on eBay. World's leading ...
Argon is a Premium Creative PSD template suitable for any type of business. 14 is number of total PSD files included.... ... Buy Argon - Creative PSD Template by IgnitionThemes on ThemeForest. ... argon, black, business, colors, creative template, ignition, ignitionthemes, minimal, photography, portfolio, psd, psd theme, ... Argon is a Premium Creative PSD template suitable for any type of business. 14 is number of total PSD files included. It has a ...
View Bora-Argon 18 2015 Pro Cycling Team Details and Profile Infos - View profiles and information for professional race teams ... Bora-Argon 18 signs promising neo-pro, No more World Ports Classic? Robert Power out of Tour de lAvenir line-up ... News shorts: Bora-Argon 18 sign Rüdiger Selig from Katusha. By Cycling News ... Bora-Argon 18 kit changes, Renson to sponsor Liv-Plantur, Dani Navarro confirms early season schedule ...
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Potassium-argon dating (idea). See all of Potassium-argon dating, no other writeups in this node. ... For example, biotite will lose argon completely at 300 Celsius, while hornblende will only lose all of its argon at ... One of the isotopes of potassium, potassium-40 is radioactive, and may decay into Argon-40.. Given the half-life of Potassium- ... However, this date is reset whenever the rock is subjected to metamorphic processes, since the argon gas can escape.. The ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
... the heavier argon-38 and the lighter argon-36. They found that while there was four times as much argon-36 as argon-38, this ... The researchers looked at two isotopes of argon, ... atmosphere and counted up the abundance of isotopes of argon in ... the heavier argon-38 and the lighter argon-36. They found that there was four times as much argon-36 as argon-38 -- a lower ... But the new argon measurements provide much firmer evidence than older, less certain data on argon isotopes from the Viking ...
Centralized system for supplying argon to production shops. *G. V. Danshin Chemical and Petroleum Engineering volume 10, pages ... Danshin, G.V. Centralized system for supplying argon to production shops. Chem Petrol Eng 10, 1038-1039 (1974). https://doi. ...
IRIDEX GL Laser - Argon For Sale You are buyding on a used in mint condition Iridex GL with Zeiss 30 SL link. Works up to the ... IRIDEX Slx Laser - Argon For Sale You are buyding on a used Iridex SLx laser console with trimode (long pulse, short pulse and ... IRIDEX SLx Laser - Argon For Sale You are buyding on a used Iridex SLx laser with trimode (long pulse, short pulse and ... IRIDEX GL Laser - Argon For Sale You are buyding on a used in excellent condition Iridex GL laser with Haag streit slitlamp ...
Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic ... Argon is a chemical element. The symbol for argon is Ar, and its atomic number (or proton number) is 18. It is a noble gas and ... Argon atoms are found in air. About 1% of the Earths atmosphere (the air around us) is argon. ... Retrieved from "https://simple.wikipedia.org/w/index.php?title=Argon&oldid=6621005" ...
... ,The Ultima 2000 SE is flexible in meeting the needs of both office and operating room use ... The Ultima 2000 SE Argon Laser System. Features. A portable photocoagulator. Multiple delivery devices of choice. Use in the ...
  • Colourless, odourless, and tasteless, argon gas was isolated (1894) from air by the British scientists Lord Rayleigh and Sir William Ramsay . (britannica.com)
  • Argon was first isolated from air in 1894 by Lord Rayleigh and Sir William Ramsay at University College London by removing oxygen, carbon dioxide, water, and nitrogen from a sample of clean air. (wikipedia.org)
  • Argon was discovered in 1894 by English chemist John William Strutt, most commonly known as Lord Rayleigh (1842-1919), and Scottish chemist William Ramsay (1852-1916). (encyclopedia.com)
  • Argon was discovered in 1894. (encyclopedia.com)
  • chemical element, 1894, Modern Latin, from Greek argon , neuter of argos 'lazy, idle, not working the ground, living without labor,' from a- 'without' (see a- (3)) + ergon 'work,' from PIE root *werg- 'to do. (etymonline.com)
  • In 1894, argon was discovered by the chemists Sir William Ramsay and Lord Rayleigh when they removed all the oxygen and nitrogen from the air in an experiment. (booktopia.com.au)
  • His departure comes on the heels of the company's greatest achievement, becoming the sponsor of a WorldTour team, Bora Argon 18, that competed at the 2015 Tour de France. (pedalmag.com)
  • Rioux watched this year's Tour behind the scenes so to speak, from Bora Argon 18's stand as his company supplies the team with bicycles as well as part of the partnership. (pedalmag.com)
  • At the finish line, Martin personally welcomed the five Bora Argon 18 riders who completed the TdF. (pedalmag.com)
  • The text recounts the experience of riding on the Bora Argon 18 team bus before a difficult stage and partying with Bora Argon 18 after the TdF. (pedalmag.com)
  • Bora Argon 18 Team announcement here . (pedalmag.com)
  • As a result, most rock contains at least one mineral which can be successfully dated by the potassium argon method. (waterstones.com)
  • The potassium-argon method is attractive for dating volcanics since it can be applied to rocks of Pleistocene age and older, thus encompassing important periods of general volcanic activity. (springer.com)
  • For meaningful dating of volcanics by the potassium argon method it is concluded that phenocryst-containing materials should be examined for fluid inclusion content, and samples which contain these should be rejected. (springer.com)
  • Naughton, J. J. , 1963 - Possible use of argon-39 in the potassium-argon method of age determination . (springer.com)
  • Coherent EPIC IV YAG/ARGON COMBO This is a Coherent Epic YAG and Coherent Ultima 2000 combo laser system. (dotmed.com)
  • This is a very clean combo system that features both a Coherent Novus 2000 Argon and a coherent 7901 Yag. (dotmed.com)
  • For example, the creation of argon hydrofluoride (HArF), a metastable compound of argon with fluorine and hydrogen , has been reported by researchers at the University of Helsinki in 2000. (wikidoc.org)
  • This property is generally ascribed to the fact that when a potassium loses exactly one electron, it acquires the very stable electron configuration of the noble gas argon. (answers.com)
  • Although theoretically ideal for energy transfer or storage, metallic hydrogen is extremely challenging to produce experimentally," said Ho-kwang "Dave" Mao, who led a team of physicists in researching the effect of the noble gas argon on pressurized hydrogen. (phys.org)
  • The addition of argon gas provides only a small improvement in U-Factor compared to the addition of LoĒ coating. (glassonweb.com)
  • Surprisingly, they discovered that the addition of argon did not facilitate the molecular changes needed to initiate a metallic state in hydrogen. (phys.org)
  • Counter to predictions, the addition of argon did not create a kind of 'chemical pressure' on the hydrogen , pushing its molecules closer together. (phys.org)
  • Unlike more promiscuous elements such as carbon and oxygen, which are constantly bonding and reacting with other elements, reliable argon and her sister noble gases (helium, neon, krypton, and xenon) remain virtually unchanged through the ages. (innovations-report.com)
  • Version 8 of Cobalt, Xenon and Argon will be released the week of June 23rd for PowerPC Mac platform machines, matching the release for Windows on January 28, 2008. (architosh.com)
  • Conventional wisdom also holds that individual argon atoms do not get trapped inside the crystal lattices of the upwelling mantle minerals. (geotimes.org)
  • While argon fills are available at many technical facilities, they can easily be done as a transfill from an industrial cylinder to a pony bottle with a gas transfer whip. (decompression.org)
  • Figure 6 illustrates a label that identifies the cylinder contents as argon, which is not suitable for breathing. (decompression.org)
  • Since some of the oxygen has been removed with the pressure swing adsorption apparatus, the graph generated by the gas chromatography apparatus shows 2 resolved peaks, namely a small argon peak preceding a large oxygen peak, even though the column of the gas chromatography apparatus is not being cooled to cryogenic temperatures with a cryogen. (google.com)
  • Also, instead of first subjecting the high purity oxygen to the pressure swing apparatus, a sample is fed directly to the gas chromatography apparatus, which produces a graph that has only 1 large peak due to the oxygen which masks the small argon peak. (google.com)
  • I find it odd that people are always tripping them with small argon lasers, IIRC they only draw around 1-1.5kW. (laserpointerforums.com)
  • The primary dam is fitted with a primary hose to inflate the dams, a secondary hose that can be used to bypass inflation and quickly flood the weld chamber with argon, and a hose outlet for venting excess argon. (thomasnet.com)
  • We have found that gas released from such inclusions by crushing contains radiogenic argon, and that the constituent minerals give very old potassium-argon ages (circa 800 million years). (springer.com)
  • In the minerals from Mauna Kuwale sporadic occurrences of inclusions have been noted in biotites and hornblendes, and crushing of the mineral releases the excess radiogenic argon. (springer.com)
  • The extent of radiogenic argon loss in these samples ranges from 7 percent to ≥ 48 percent. (sciencemag.org)
  • Argon is also used in making "neon" lamps and in lasers. (encyclopedia.com)
  • Frequency-doubled diode lasers that produce blue light at or near 488 nm have emerged over the past couple of years, potentially affecting the multibillion-dollar instrumentation market based on the air-cooled argon-ion laser that has evolved over the past two decades. (photonics.com)
  • Tens of thousands, if not hundreds of thousands, of air-cooled argon lasers have been sold for flow cytometry, DNA sequencing, confocal microscopy and other analytical medical technologies that involve the fluorescence of a marker dye. (photonics.com)
  • The power and pointing stability and the beam quality of solid-state lasers are competitive with those of argon lasers. (photonics.com)
  • A chlorine atom has a very strong attraction (its electronegativity) for exactly one electron, which gives the charged atom the electron configuration of an argon atom. (answers.com)
  • The outermost (valence) shell of argon has eight electrons , making it exceedingly stable and, thus, chemically inert. (britannica.com)
  • Argon also has all of its electrons in the 3rd valence shell. (answers.com)
  • Also, K+ now has the same number of electrons as Argon. (answers.com)
  • The reason why, at least I would say, argon has a larger radius than K+ is that even though they are in the same valence shell and have the same number of electrons, argon has one less proton than K+. (answers.com)
  • Potassium 1+ acts like argon a little with the number of electrons. (answers.com)
  • The argon atom does not want to give or receive or give electrons because it is already as stable as possible. (answers.com)
  • It is definitely economically worth-having argon inside IGU and even better with krypton as with the latter, you can save up to 10% of your electricity bill. (glassonweb.com)
  • Concentration profiles for radical species in a methane-oxygen-argon flame. (cdc.gov)
  • Concentration profiles through the reaction zone of a low-pressure, slightly lean methane-oxygen-argon flame have been measured, in situ, for the following unstable species: oxygen atoms, hydrogen atoms, hydroxyl radicals, methyl radicals, and formyl radicals. (cdc.gov)
  • A process for determining the amount of argon contamination present in high purity oxygen employing a combination apparatus including a gas chromatography apparatus, a pressure swing adsorption apparatus, and a conduit connecting the two apparatus to each other. (google.com)
  • By comparing the 2 graphs, an accurate determination can be made of the amount of argon contamination in the high purity oxygen. (google.com)
  • 2. The process of claim 1, with the gas in the container having said high oxygen to argon volume ratio, with the amount of argon contamination in the oxygen being about 30 parts per million volume or less. (google.com)
  • The name "argon" is derived from the Greek word ἀργόν , neuter singular form of ἀργός meaning "lazy" or "inactive", as a reference to the fact that the element undergoes almost no chemical reactions. (wikipedia.org)
  • Argon (Greek ἀργόν, neuter singular form of ἀργός meaning "lazy" or "inactive"), is named in reference to its chemical inactivity. (wikipedia.org)
  • The name argon comes from the Greek word argos, "the lazy one. (encyclopedia.com)
  • Pure Argon BOC offers a range of high purity Argon to suit your application and process needs. (boconline.co.uk)
  • Argon flash is a standard procedure for high speed photography, especially for photographing explosions, or less commonly for use in high altitude test vehicles. (wikipedia.org)
  • The rectangular depression is the result of multiple bombardments of the surface with buckyballs and argon during a depth-profiling procedure. (phys.org)
  • Argon is also used in incandescent , fluorescent lighting , and other gas-discharge tubes. (wikipedia.org)
  • He added that both Gervais Rioux and Argon 18's general manager, Stéphane Mayer, have known about his decision for some time. (pedalmag.com)
  • With its streamlined handlebar and totally integrated virtual stem, Argon 18's ONEness 3.0 cockpit has a significant impact on the aerodynamic efficiency of the E-118 Next . (argon18bike.com)
  • Argon specialises in electronic dance music styles ranging from dubstep, drum and bass and electronica. (metalstorm.net)
  • I believe I got put on to Argon first via Skynet 's dubstep releases, when I was first really trying to listen to all the dubstep I could. (rockthedub.com)
  • I think Nick was kind of shocked that I asked him to be a part of this "Best of 2008" series, but I had featured a few episodes of Argon Radio, and loved his take on dubstep mixing. (rockthedub.com)
  • What he did was throw up some released and forthcoming Argon material into a slick 30 minute dubstep journey, exclusive for the RTD dubsteppas. (rockthedub.com)
  • Argon atoms have been trapped mechanically in cagelike cavities among molecules of other substances, as in crystals of ice or the organic compound hydroquinone (called argon clathrates). (britannica.com)
  • In cosmic abundance, argon ranks approximately 12th among the chemical elements. (britannica.com)
  • I'm talking heads like Tes La Rok , Babylon System , 12th Planet , Cotti and others, including Matty G , who released his Take You Back album on Argon this year. (rockthedub.com)
  • Argon gas condenses to a colourless liquid at −185.8° C (−302.4° F) and to a crystalline solid at −189.4° C (−308.9° F). The gas cannot be liquefied by pressure above a temperature of −122.3° C (−188.1° F), and at this point a pressure of at least 48 atmospheres is required to make it liquefy. (britannica.com)
  • In today's technology-laden combat arenas the importance of developing alternate technologies to GPS for precision positioning and navigation has never been more critical," said Kerry Rowe, President and Chief Operating Officer, Argon ST. "We are committed to helping solve the fundamental problem of navigation and geolocation in GPS-denied or -degraded areas, especially in the difficult environments inside buildings and in urban canyons. (corporate-ir.net)
  • President and Chief Operating Officer, Argon ST commented, "We are pleased that our efforts to reduce infrastructure and overhead costs and to improve program execution continues to help margins. (corporate-ir.net)
  • Cardinal uses spark emission spectroscopy to automatically measure the argon fill level of its IG units on-line at the time of manufacture. (glassonweb.com)
  • The paper presents the investigations of an atmospheric-pressure argon plasma generated at 915 MHz microwaves using the optical emission spectroscopy (OES). (hindawi.com)
  • In this work, an optical emission spectroscopy (OES) [ 13 - 17 ] method has been used for diagnosing the microwave argon plasma. (hindawi.com)
  • The spinal hose has a reactive valve to vent argon to the weld chamber. (thomasnet.com)
  • Argon inflates the primary dam, flows through the spinal hose and inflates the secondary dam before finally venting through the reactive valve in the spinal hose to flood the weld chamber. (thomasnet.com)
  • Argon, an inert gas, can provide a barrier to oxidation of highly reactive metals, such as magnesium. (airproducts.com)
  • In fact, they found that even volcanic activity is unlikely to dislodge argon atoms from their resting places within the mantle. (innovations-report.com)
  • This report is a compilation of the results of the potassium-argon dating of the Tertiary volcanic field of trans-pecos Texas. (cdc.gov)
  • Long-term outcome of argon plasma ablation therapy for bleeding in 100 consecutive patients with colonic angiodysplasia. (nih.gov)
  • Endoscopic argon plasma ablation therapy is useful in the management of bleeding from colonic angiodysplasia. (nih.gov)
  • This model investigates the electrical characteristics of the GEC reference cell for argon chemistry. (comsol.se)
  • So Mao and his team set out to study the intermolecular interactions of hydrogen that's weakly-bound, or "doped," with argon, Ar(H2)2, under extreme pressures. (phys.org)
  • The team brought the argon-doped hydrogen up to 3.5 million times normal atmospheric pressure-or 358 gigapascals-inside a diamond anvil cell and observed its structural changes using advanced spectroscopic tools. (phys.org)
  • What they found was that hydrogen stayed in its molecular form even up to the highest pressures, indicating that argon is not the facilitator many had hoped it would be. (phys.org)
  • Heavier than air, argon will collect in low-lying areas, ducts and drains. (boconline.co.uk)