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.
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.
The use of photothermal effects of LASERS to coagulate, incise, vaporize, resect, dissect, or resurface tissue.
The use of green light-producing LASERS to stop bleeding. The green light is selectively absorbed by HEMOGLOBIN, thus triggering BLOOD 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 in which a gas lasing medium is stimulated to emit light by an electric current or high-frequency oscillator.
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.
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.
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).
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.
INFLAMMATION of the MUCOUS MEMBRANE of the RECTUM, the distal end of the large intestine (INTESTINE, LARGE).
Any surgical procedure for treatment of glaucoma by means of puncture or reshaping of the trabecular meshwork. It includes goniotomy, trabeculectomy, and laser perforation.
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 whose membership is limited to pharmacists.
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.
Activities concerned with governmental policies, functions, etc.
The decision process by which individuals, groups or institutions establish policies pertaining to plans, programs or procedures.
Selection of a type of occupation or profession.
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.
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.
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.
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.
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.
A class of MOLECULAR CHAPERONES whose members act in the mechanism of SIGNAL TRANSDUCTION by STEROID RECEPTORS.
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.
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)
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.
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.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
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.
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.
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)
The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)
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)

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 and Safety of Argon Plasma Coagulation in Treatment of Radiation Proctitis., Muhammmed Sait Dag, ?rem Ak?n, Zeynel Abidin Öztürk, Abdurrahman Kuzhan ,Musa Ayd?nl?,
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 ...
Argon is en Eddelgas, dat in grote Mengden praat steiht un vergliekswies billig is. Dorüm warrt dat in vele Rebeden bruukt. De weltwiete Produkschoon leeg 1998 bi ruchweg 2 · 109 m3.[9] De gröttste Deel Argon warrt as Schuulgas bruukt, jümmer denn, wenn Stickstoff nich insett warrn kann, so ton Bispeel as Inertgas bi dat Schweißen oder in automaatsch Füerlöschanlagen. Ok bi dat Verarbeiden vun Wolfram warrt dat bruukt, as Wolfram ahn dat Schuulgas dör den Suerstoff in de Luft bannig gau spröd warrt. As dat Gas nich goot de Warms leiden deit, warrt dat ok bi Isoleerglasschieven oder in Dukerantöög as Füllgas bruukt. As Schuulgas warrt Argon ok tosamen mit Stickstoff in Gleihlampen füllt. Wegen dat Argon kann weniger von den Gleihdraht verdampen as int Vakuum von annere Lampen. Dorüm kann de Temperatur von den Draht hööger maakt un so mehr Licht ruthollt warrn. In Gasentladungslampen deent Argon as Lüchtgas mit en tyypsch vigeletten Klöör. Warrt n beten Quecksülver tosett, ...
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
Lasos LGK 7812 ML3 Argon Laser 500mW Output 450-530nm Wave Length - Here is a Lasos LGK 7812 ML3 Argon Laser 500mW Output 450-530nm Wave LengthMade in 2007New pricePredecessor to:N/ACondition:This Lasos Carl Zeiss 10 D-07745 JENA Argon Laser is in good ov
For investigations on Argon gas bubbles in liquid Sodium ultrafast electron beam X-ray computed tomography is applied. The repository comprises imaging data obtained at different heights of the test facility and various gas volume rates. The CT scanner is operated in dual-plane mode with a deflection frequency of 2 kHz for approximately 30s.
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 ...
Argon olje - znan tudi kot Arganovo Olje - se pridobiva iz jeder sadja iz argona drevesa . Argon Drevo raste v naravi in je na seznamuogroženih vrst pod zaščito Unesca. Ima globok koreninski sistem , ki pomaga , da ga zaščiti pred erozijo tal . Argon ima različne namene , zaradi katerih je priljubljen ne samo zdaj, ampak , ki so se je priljubljena v vsej zgodovini , kot dobro. Argon Nepremičnine ...
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 ...
Gornitzky represented Oxygen and Argon Works Ltd. (OXAR), one of Israels largest manufacturers and suppliers of industrial gases, in the signing of a NIS 186 million investment transaction with FIMI Opportunity Funds, for which FIMI shall receive 51% of OXARs share capital. The closing of the investment is subject to, inter alia, the approval of the Israel Antitrust Authority.. Oxygen and Argon Works provides industrial gases to over 500 institutions and factories in Israel, including leading companies in the metal, electronic, chemical, petrochemical, food, glass and recycling (environmental) industries, as well as research institutes, universities, medical institutions and the Israeli Ministry of Defense.. The representation of Oxygen and Argon Works Ltd. was led by Gur Y. Savir (Partner) and Uri Heller. The proceedings vis-à-vis the Israel Antitrust Authority are being led by Avner Finkelshtein (Partner) and Noa Schweitzer.. ...
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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$ ...
Brand new Argon18 Nitrogen seat post. Aero Carbon seat post that is both light and easily adjustable. Fits the Argon19 Nitrogen model. Specifications: Brand new Only usable for the Argon18 Nitrogen Setback: 10mm Weight: 215g Uncut - 35cm
Download:. TO FAST DOWNLOAD, PLEASE CLICK LINK DOWNLOAD BELOW: Rapidgator, Snakefiles, Nitroflare - AND REGISTER AN ACCOUNT PREMIUM OR UPGRADE PREMIUM YOUR ACCOUNT, IT HELP MAINTAINING THE FILE..[]_Argon_-_30_Line_Call_Outs.rar.html. If you have time and can wait, download here:. Demo:. ...
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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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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.
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 ...
T75 ISO Tank Container Cryogenic for Liquid LNG, Oxygen ...T75 ISO Tank Container Cryogenic for Liquid LNG, Oxygen, Nitrogen, Argon, 20FT Container Portable. Loading... Model NO. 1. DRZ Cryogenic Storage Tank include the following ISO cryogenic tank:10ft, 12ft, 20ft, 40ft. 2. Used for: liquid oxygen tank container, liquid nitrogen tank container, liquid argon tank container, liquid Nitrous Oxide tank container, liquid carbon dioxide tank container, LNG tank container, LPG tank container, AHF tank container, Liquid Chlorine tank container, liquid ...
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
TY - JOUR. T1 - Effects of Nitrogen and Oxygen contamination in liquid Argon. AU - Acciarri, R.. AU - Antonello, M.. AU - Baibussinov, B.. AU - Baldo-Ceolin, M.. AU - Benetti, P.. AU - Calaprice, F.. AU - Calligarich, E.. AU - Cambiaghi, M.. AU - Canci, N.. AU - Carbonara, F.. AU - Cavanna, F.. AU - Centro, S.. AU - Cocco, A. G.. AU - Di Pompeo, F.. AU - Fiorillo, G.. AU - Galbiati, C.. AU - Gallo, V.. AU - Grandi, L.. AU - Meng, G.. AU - Modena, I.. AU - Montanari, C.. AU - Palamara, O.. AU - Pandola, L.. AU - Pietropaolo, F.. AU - Raselli, G. L.. AU - Roncadelli, M.. AU - Rossella, M.. AU - Rubbia, C.. AU - Segreto, E.. AU - Szelc, A. M.. AU - Tortorici, F.. AU - Ventura, S.. AU - Vignoli, C.. PY - 2009/12/15. Y1 - 2009/12/15. N2 - Two dedicated and distinct tests of Nitrogen and Oxygen contamination effects in liquid Argon (LAr) have been performed within the WArP R&D program. Purpose of the tests is to detect the reduction of the LAr scintillation light emission as a function of the ...
Actimate Sdn Bhd - Gas Pipe Argon Malaysia, Puchong, Selangor. Suppliers, Supplies, Supplier, Supply, Manufacturer, We are specializing in argon machine and other machinery, stainless steel accessories, stainless steel sheet & coil, stainless steel flat bar, rod, angle bar, aluminum sheet & coil, aluminum extrusion, and other metal products.
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
Price: $750.00; Manufacturer: Apricot Designs; Item ID: 8002184; Warranty: 30-Day Money-Back Guarantee; Description: Apricot Designs AD-192 Argon Dispenser. Provides and automated argon blanket for
[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...
The etiology of gastric antral vascular ectasia (GAVE) syndrome or gastric hyperplastic polyps (HPs) is not fully understood. We report a case of gastric HP arising in a patient treated with argon plasma coagulation (APC) for GAVE syndrome. Despite unclear etiologic progression, this and previously reported cases suggest a temporal relationship between the treatment of GAVE and HP. A 68-year-old male with a history of coronary artery disease, congestive heart failure and diabetes type II who initially presented with symptomatic anemia 2 weeks after starting aspirin and clopidogrel therapy. Diagnostic esophagogastroduodenoscopy (EGD) demonstrated diffuse GAVE. He was treated with 5 APC treatments, at 6-week intervals, over a 30 weeks period. 16 months after the initial APC treatment, an EGD performed secondary to persistent anemia demonstrated innumerable, large, bleeding polyps in the gastric antrum. Biopsy performed at that time confirmed hyperplastic gastric polyps. It has been proposed that HPs are
Endoscopic Argon Plasma Coagulation; General Surgery; Colon and Rectal Surgery; Adenomatous Polyp of the Colon and Rectum; Anal Cancer; Anal Dysplasia ...
|i|Background|/i|. Argon plasma coagulation (APC) is useful to treat upper gastrointestinal bleeding, but its hemostatic efficacy has received little attention. |i|Aims|/i|. This investigation attempted to determine whether additional endoscopic injection before APC could improve hemostatic efficacy in treating high-risk bleeding ulcers. |i|Methods|/i|. From January 2007 to April 2011, adult patients with high-risk bleeding ulcers were included. This investigation compared APC plus distilled water injection (combined group) to APC alone for treating high-risk bleeding ulcers. Outcomes were assessed based on initial hemostasis, surgery, blood transfusion, hospital stay, rebleeding, and mortality at 30 days posttreatment. |i|Results|/i|. Totally 120 selected patients were analyzed. Initial hemostasis was accomplished in 59 patients treated with combined therapy and 57 patients treated with APC alone. No significant differences were noted between these groups in recurred bleeding, emergency surgery, 30-day
Argon Medical Devices, Inc., a global manufacturer of specialty medical devices used in interventional procedures, announced today that it has completed the acquisition of Mana-Tech, Ltd., its exclusive distributor for the United Kingdom and Ireland.. For more information on Argon Medicals products & services visit The acquisition of Mana-Tech, Ltd. represents a compelling growth opportunity to expand our commercial reach in the UK, Ireland and throughout Europe, George Leondis, President and Chief Executive Officer of Argon Medical Devices, commented. We are excited to have this very talented group join Argon and to work even more closely with them to continue their successful growth trajectory.. The entire Mana-Tech team, including its management, sales, customer service and distribution groups, will join Argon as part of the acquisition.. ...
Purpose: to determine the effect of Grid pattern laser photocoagulation on diabetic diffuse macular edema with assessment of visual outcome. Patients & Methods: The author reviewed the medical records of 84 eyes of 62 patients with diabetic diffuse macular edema treated with Grid pattern green Argon laser photocoagulation in Farabi ...
Evaporated gold and tantalum films have been bombarded with argon ions. In the case of gold films this resulted in an increase of the sheet-resistance by sputter etching to a maximum of 40 kO/[square] . The strain-gauge coefficient of resistance (gamma) (i.e. the fractional change in resistance per unit strain) was measured for films with a wide range of sheet-resistance, and was found to be almost invariant with an average of 2.6. This contrasts. greatly with the published values of gamma of up to 100 for thin island-structure evaporated films of similar sheet-resistance. The temperature coefficient of strain-gauge factor (beta) was found to be similar in magnitude but opposite in sign to the temperature coefficient of resistivity (alpha), which was measured as +12 x 104/°C. The measured values of gamma, beta and alpha agree well with values calculated assuming metallic conduction modified by reduction of the electron mean- free-path. We, therefore, conclude that a connected metallic layer ...
This report is the 1st edition of the market research for argon in Russia.. The purpose of the study is to analyze the market of argon.. The object of investigation is argon (gaseous and liquid).. This report is a desk study. As sources of information, data from the Federal Service of State Statistics of the Russian Federation (Rosstat), the Federal Customs Service of the Russian Federation (FCS of the Russian Federation), customs statistics and statistics of railway transportation of the Russian Federation, the UNdata base were used.. The data of the sectoral and regional press, annual and quarterly reports of securities issuers, Internet sites of manufacturing enterprises and consumers of argon were also attracted; The InfoMine database was used; Conference materials.. The main chronological scope of the study: 2008-2016; Forecast - until 2025.. Geography of the research: Russia.. Scope of the study: the report consists of 9 parts, contains 64 pages, including 26 tables, 20 figures, 1 ...
Sinopsis Drama Korea Argon (tvN). Kim Baek-Jin yang diperankan oleh Kim Ju-Hyeok adalah seorang jangkar, reporter dan pemimpin program pelaporan investigasi Argon. Dia tidak mentoleransi kesalahan dan hanya mengandalkan fakta. Sementara itu, Lee Yeon-Hwa yang diperankan oleh Chun Woo-Hee adalah seorang reporter kontrak. 3 bulan sebelum kontraknya berakhir, dia ditugaskan untuk bekerja di Argon. Dia berjuang untuk mendapatkan pekerjaan tetap di sana sebagai reporter. Bekerja dengan Kim Baek-Jin, dia menerima pelatihan ketat dan tumbuh menjadi seorang reporter.. Details Drama Korea Argon (tvN). Title: 아륵곪 / ...
The effects of xenon, argon, and hydrogen on the aerobic and anaerobic metabolism of mouse liver, brain, and sarcoma slices have been investigated. Xenon was found to alter the rates of metabolism of these tissues in a manner almost identical with helium. The gas increased the rate of oxygen consumption in all three tissues and significantly depressed that of anaerobic glycolysis in brain and liver. The depression of glycolysis in sarcoma was less pronounced and not highly significant.. Although both the magnitude and statistical significance of the effects observed with argon were much smaller, there was a seeming adherence to the general pattern established by xenon and helium. Hydrogen while remaining essentially ineffective insofar as oxygen uptake was concerned, depressed glycolysis in both liver and brain slices but did not significantly affect sarcoma slices.. The following points are stressed in the Discussion: (1) the magnitude and direction of effects exerted by helium, argon, xenon, ...
Since lasers have become so powerful in dusty plasma research, it is important to determine the manner in which a laser will affect the plasma. In this work, a Verdi ™ G-Series optically pumped semiconductor laser was used in conjunction with a Langmuir probe to determine the effect (if any) that the laser has on the plasma. A Langmuir probe was used to measure and monitor various plasma parameters in a dusty argon plasma. Measurements were taken with the laser immediately beneath the probe at various plasma pressures, plasma powers, and laser powers ...
The mean age of patients was APC 65.8 ±10.03 vs. ESD 64.6 ±11.22 (p = 0.146). The mean adenoma size was 0.9 ± 0.45 cm in the APC group and 1.2 ± 0.72 cm in the ESD group (p < 0.001). The mean duration of hospital stay was significantly shorter in the APC group than the ESD group (APC 1.55 days vs. ESD 5.80 days, p < 0.001). Complication did not occur in the APC group. However, one case of perforation (0.9%) and 6 cases of bleeding (5.3%) occurred in the ESD group. Recurrence rates were 15.3% (15/97 patients) in the APC group and 3.5% (4/113 patients) in the ESD group (p = 0.003). One recurrent case of APC group was diagnosed with adenocarcinoma which was completely treated by surgery. The proportion of hospitalization was less in the APC group (43.3 %, 42/97) than the ESD group (100.0 %, 113/113) (p < 0.001). Medical expense was less in the APC group (377,172 won, 351 dollar) than the ESD group (1,430,610 won, 1,333 dollar) (p < 0.001). No complication was observed in APC treatment group by ...
Argon Krypton Laser found in: INNOVA Sabre, Laser Focus World - August 2016, INNOVA 70C, Advances in Diode Lasers and OPSLs, Ion Lasers, INNOVA 90C,..
TY - JOUR. T1 - Molecular dynamics study on external field induced crystallization of amorphous argon structure. AU - Park, Seungho. AU - Cho, Sung San. AU - Lee, Joon Sik. AU - Choi, Young Ki. AU - Kwon, Ohmyoung. PY - 2004/11. Y1 - 2004/11. N2 - A molecular dynamics study has been conducted on an external-force-field- induced isothermal crystallization process of amorphous structures as a new low-temperature athermal crystallization process. An external cyclic-force field with a dc bias is imposed on molecules selected randomly in an amorphous-phase of argon. Multiple peaks smoothed out in the radial distribution functions for amorphous states appear very clearly during the crystallization process that cannot be achieved otherwise. When the amorphous material is locally exposed to an external force field, crystallization starts and propagates from the interfacial region and crystallization growth rates can be estimated.. AB - A molecular dynamics study has been conducted on an ...
Kang and coauthors describe their technique of argon laser iridoplasty used to correct iris obstruction that sometimes occurs after Boston keratoprosthesis impl
In this clinical trial study,the investigators intend to compare two methods of trichiasis treatment.One by argon laser and the other by radiofrequency then compare the result of these procedures, especially, the investigators would like to compare which of these have less complications such as bleeding,pain,notch in the site of surgery and etc ...
Ice bags: This type of cryotherapy makes use of simple ice bags like a plastic bag, chemical cold packs, a hot water bottle, and frozen vegetables. During this technique, first you need to dry the affected area. Place a terry cloth towel over the affected area to avoid direct contact of the ice with the skin.. Apply the ice pack for 10-15 minutes. During this process, your skin undergoes 4 stages of sensation. They include: cold, burning, aching and numbness. Immediately stop doing the therapy, whenever you feel numb.. Ice massage: This is another form of cryotherapy. Take clean tap water in a container and keep in the freezer until it is completely frozen. Take a small amount of ice and massage with it on the affected area with constant circular motion. Avoid holding the ice cube in one area for more than 3 minutes.. But, cryotherapy is not recommended for everyone. This therapy should not be used by the people who:. ...
Benign airway tumors with central airway obstruction require immediate intervention for symptoms relief. Argon Plasma Coagulation (APC) is a cheap tool readily available in hospitals.. Four patients presented for obstructing tracheal or bronchial tumor (2008 to 2011). Initial investigations included fiberoptic bronchoscopy and CT imaging of the chest. Argon plasma was set to 35 Watt and delivered in non-contact fashion through a large fiber during rigid bronchoscopy. Initially tumor coagulation was done followed by mechanical resection and finally APC was applied to tumor base. Patients were discharged next day and followed clinically by CT imaging and bronchoscopy. All patients were reevaluated one year after ablation to eliminate recurrence.. Case1: 24 years old female presented for uncontrolled asthma. Endoscopic resection with APC revealed tracheal schwannoma.. Case2: 35 years old female, 6 month pregnant, intubated for respiratory failure due to obstructive tracheal tumor. Endoscopic ...
Five patients required a second endoscopic examination because of recurrent or persistent bleeding (3.7% of cases): a man of 56 years old with Gastric Cancer who required emergency surgery, a male of 68 years old with Pancreatic cancer duodenal extension required emergency surgery, a male of 42 years with Liver Cirrhosis with a second Esophageal variceal Bleeding that was treated with another elastic band, a 31 year old female with Stomach Ulcers without new endoscopic findings, a male of 48 years old with Diabetes Mellitus type 2 had Gastric Angiodysplasia previously treated with Argon plasma without new findings (Colonoscopy revealed Angiodysplasia at Cecum and was treated with Argon Plasma coagulation). During the first half of 2012 Upper Gastrointestinal Bleeding was the indication 5.2% of all endoscopies and 8.7% of the Gastroscopies, being relevant [4].. In terms of demographic characteristics, associated medical conditions and current or recent medication it was no difference with those ...
This paper discusses the spectral features of the amplification of narrow-band radiation of atomic nitrogen in the excimeric media of inert gases, including helium, argon, krypton, and xenon. Appreciable short-wavelength shifts (up to 0.026 nm) are detected in the spectra of the amplified radiation relative to the atomic emission lines of nitrogen that initiate this radiation. The observed shifts exceeded the instrumental resolution of the spectrometer that we used, were determined by the composition of the amplifying medium, and were independent of its excitation parameters under the experimental conditions. An explanation of the observed effect is proposed.. © 2012 OSA. PDF Article ...
By the use of a closed chamber and a continuous flow of gas through this chamber a controllable welding atmosphere has been provided for experimental work. The atmosphere may be varied from 100% argon, 99.95% pure, to 100% 0(2), N(2), or any combination of these or other gases. The chamber provide a fresh gas shield in an atmosphere of the same composition as the shield. Using the controlled atmosphere chamber, welds in carbon deoxidized arc cast molybdenum are shown to be subject to hot short cracking when the oxygen content in the argon atmosphere around the arc exceeds 0.2%. The ductility of these welds was drastically reduced by the presence of more than 0.05% oxygen in the welding atmosphere. Oxygen in sintered molybdenum is shown to produce porosity and hot short cracking. However, crack and porosity free welds have been produced by using deoxidizing agents in sintered molybdenum.
BACKGROUND: In recent years, argon has been shown to exert neuroprotective effects in an array of models. However, the mechanisms by which argon exerts its neuroprotective characteristics remain unclear. Accumulating evidence imply that argon may exert neuroprotective effects via modulating the activation and polarization of microglia/macrophages after ischemic stroke. In the present study, we analyzed the underlying neuroprotective effects of delayed argon application until 7 days after reperfusion and explored the potential mechanisms. METHODS: Twenty-one male Wistar rats underwent transient middle cerebral artery occlusion or sham surgery randomly for 2 h using the endoluminal thread model. Three hours after transient middle cerebral artery occlusion induction and 1 h after reperfusion, animals received either 50% vol Argon/50% vol O2 or 50% vol N2/50% vol O2 for 1 h. The primary outcome was the 6-point neuroscore from 24 h to d7 after reperfusion. Histological analyses including infarct ...
1. Total arsenic The method described in this manual assesses arsenic exposure by analyzing urine through the use of inductively coupled-plasma dynamic reaction cell-mass spectrometry (ICP-DRC-MS). Urine is analyzed because urinary excretion is the major pathway for eliminating arsenic from the mammalian body. This method achieves rapid and accurate quantification of total urinary arsenic. Total urine arsenic concentrations are determined by using ICP-DRC- MS. This multielement analytical technique is based on quadrupole ICP-MS technology and includes DRC™ technology, which minimizes or eliminates much argon-based polyatomic interference. Coupling radio frequency power into a flowing argon stream seeded with electrons creates the plasma, the heat source, which is ionized gas suspended in a magnetic field. Predominant species in the plasma are positive argon ions and electrons. Diluted urine samples are converted into an aerosol by using a nebulizer inserted within a spray chamber. A portion of ...
Argon (Greek ἀργόν, neuter singular form of ἀργός meaning lazy or inactive), is named in reference to its chemical inactivity. This chemical property of this first noble gas to be discovered impressed the namers.[12][13] An unreactive gas was suspected to be a component of air by Henry Cavendish in 1785.[14] 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.[15][16][17] They first accomplished this by replicating an experiment of Henry Cavendishs. They trapped a mixture of atmospheric air with additional oxygen in a test-tube (A) upside-down over a large quantity of dilute alkali solution (B), which in Canvendishs original experiment was potassium hydroxide,[14] and conveyed a current through wires insulated by U-shaped glass tubes (CC) which sealed around the platinum wire electrodes, leaving the ends of the wires (DD) exposed to the ...
0060]For the case of coating the interior of a 1.75 inch (44.45 millimeter) diameter by 12 inch (304.8 millimeters) long carbon steel (1222) pipe, using a DC pulse power supply to generate the plasma as described above. It should be noted that the power settings below are DC values and the per pulse power will be much higher, resulting in high ion bombardment as described earlier. [0061]A) The pipe is pumped to the low millitorr pressure range. [0062]B) The surface is activated and cleaned by introducing argon gas, and generating a plasma by applying a DC pulsed bias voltage. [0063]C) A nitrogen plasma is used to heat the part to the desired temperature. [0064]D) Adhesion PEB steps: [0065]1. Tetramethylgermanium precursor is introduced with argon at a pressure of 150 mTorr and a power of 180 watts with a 5% total duty cycle for 5 seconds. [0066]2. Argon is introduced for 4 minutes at a pressure of 65 mTorr with a power of 240 watts with a duty cycle of 15%. [0067]3. Steps A and B are repeated ...
Abstract Glow discharges are used in a large number of applications, and it is one of the most common plasmas used in industry. The most important application of glow discharges is probably in microelectronic
A method for coagulating tissue during endoscopic surgery by using argon plasma coagulation is described. An endoscope is used having a flexible, hollow tube inserted through one of the working channels of the endoscope. Inside the tube an electrode is arranged stationarily being offset from the exit opening at the distal end of the tube in such a manner that the electrode cannot come into contact with the tissue. Argon or another inert gas is supplied from a source of gas through the tube to the exit opening with such a low flow rate that gas exiting through the exit opening is a non laminar stream which forms an inert gas atmosphere between the distal end of the tube and the region of the tissue to be coagulated, while the exit is maintained at a distance from the tissue to be coagulated, whereby the area of tissue to be coagulated is positioned sidewardly of the extended longitudinal axis of the protruding end portion of the tube.
Ultra high purity gases usually cost more than gases of lower purities due to the process involved in making the gases. One such method of purification uses filters of decreasing pore size to remove larger particles as the gas enters, and smaller particles as the gas continues through, such that enough impurities are removed from the gas to achieve Ultra High Purity.. Speciality Gases provides certified ultra pure gases i.e. Nitrogen, Argon, Helium, Zero Air, Hydrogen to be used as carrier gas in Gas Chromatographs (GCs) and other analytical instruments.. Our ultra pure gases have stringent high-purity specifications. We achieve consistent high-purity through extensive gas cylinder preparation, dedication of gas cylinders for gas service and quality control at every step.. By using our High purity Gases you will optimize cost and quality of analytical results, regardless of application and significantly extend the life of GC columns, detectors and instruments.. ...
Guided by CALPHAD (Calculation of Phase Diagrams) modeling, the refractory medium-entropy alloy MoNbTaV was synthesized by vacuum arc melting under a high-purity argon atmosphere. A body-centered cubic solid solution phase was experimentally confirmed in the as-cast ingot using X-ray diffraction and scanning electron microscopy. The measured lattice parameter of the alloy (3.208 Å) obeys the rule of mixtures (ROM), but the Vickers microhardness (4.95 GPa) and the yield strength (1.5 GPa) are about 4.5 and 4.6 times those estimated from the ROM, respectively. Using a simple model on solid solution strengthening predicts a yield strength of approximately 1.5 GPa. Thermodynamic analysis shows that the total entropy of the alloy is more than three times the configurational entropy at room temperature, and the entropy of mixing exhibits a small negative departure from ideal mixing.
Calculations were carried out to study the effectiveness of a gas curtain for mitigating contamination form hydrocarbon gases in extreme UV (EUV) lithography tools. The momentum, energy and mass transport in the curtain and surrounding regions were calculated using a 2D finite volume model of a lithography tool. Argon was used for the gas curtain. The results from the calculations quantify the relationship between the argon flow rate and the hydrocarbon partial pressure in the region of the optical elements. In general, the hydrocarbon partial pressure decreases as the mass transfer Peclet number, Pe equals Vh/D, increases, where V is the velocity of the argon, h is the thickness of the gas curtain and D is the mass diffusivity. An argon flow rate of 12.2 torr 1/s is required to reduce the hydrocarbon partial pressure from 10-7 to 10-10 torr in the specific lithography tool considered here. The EUV transmission in the tool with the gas curtain is 0.93. This is a large improvement over the 0.5 ...
A mixture of styrene (44.2 g, 424 mmol) and Rh2(S-DOSP)4 (1.58 g, 0.85 mmol) in pentane (350 mL) was stirred at -78° under an argon atmosphere. To this solution was added methyl (E)-2-diazo-4-phenyl-3-butenoate (17.2 g, 84.8 mmol) in pentane (0.12 M) over 30 minutes, and the reaction mixture was then stirred at -78° for 24 hours. The mixture was then concentrated in vacuo, and the residue was purified on silica using ether/petroleum ether (0:100 to 10:90) as the eluent to give (1S,2S)-methyl 2β-phenyl-1β-[2-(Z)-styryl]cyclopropane-1α-carboxylate (16.05 g, 68%) as a white solid (mp 57-60°; 98% ee); IR ( CHCl3) 3110, 3090, 3060, 2980, 2950, 2880, 1735 cm-1; 1H NMR (148) ( CDCl3) 1.85 (dd, J = 7.3, 5.1 Hz, 1 H), 2.05 (dd, J = 9.1, 5.1 Hz, 1 H), 3.04 (dd, J = 9.1, 7.3 Hz, 1 H), 3.77 (s, 3 H), 6.15 (d, J = 15.9, 1 H), 6.37, (d, J = 15.9 Hz, 1 H), 7.12-7.28 (m, 10 H); 13C NMR ( CDCl3) 18.5, 33.2, 34.9, 52.3, 124.0, 126.1, 126.7, 127.2, 127.9, 128.3, 129.0, 133.0, 135.4, 137.0, 174.1; [α]25D - ...
A study was made of the effects of laser radiation on the structure and function of the primate retina. The program encompasses the ocular effects of pulsed and CW laser radiation through: (1) Anatomical studies of laser-exposed and non-exposed tissue at the resolution of both light and electron optics. These are directed toward studies of the chemical morphology of retinal structures through enzyme and other staining techniques. (2) Analysis of bioelectric potentials in the visual system. The electroretinogram recorded from the intact eye is used to follow long-term effects of laser radiation. The LERG (localized electroretinogram) will be used to study localized effects of laser radiation. Single unit recording from the fourth-order neurons (LGN) of the visual system will be used to study photochemical effects of laser radiation. (3) Laser-induced changes in retinal metabolism are being investigated through autoradiographic studies of C14 labeled vitamin A. (4) Laser exposures of the macula
Residence timescales of silicic magma chambers in the earths crust are poorly known. Some recent determinations of these timescales, based on 40Ar/39Ar analysis of quartz hosted melt inclusions, may be flawed due to the problem of excess argon (40ArE) in trapped melt. In order to quantitatively assess the influence of 40ArE on estimated magma chamber ages, we sampled melt inclusion bearing quartz (MIBQ) from plinian pumice deposits of the Bishop Tuff (0.76 ± 0.01 Ma) in Long Valley, California, and the Lower (1.61 ± 0.01 Ma) and Upper Bandelier Tuffs (1.22 ± 0.02 Ma) from the Jemez Mountains west of Los Alamos, New Mexico. Three types of glass are observed in the MIBQ. First, non-vesicular glass adhered to the outside of the crystal; second, hourglass inclusions (inclusions that are not fully enclosed within the crystal and may have been in free exchange with atmosphere at the time of eruption); and third, fully trapped melt inclusions. Each sample was prepared for analysis in three ways: ...
Background:Hypoxic-ischemic encephalopathy is a major cause of mortality and disability in the newborn. The authors investigated the protective effects of argon combined with hypothermia on neonatal rat hypoxic-ischemic brain injury.Methods:In in vitro studies, rat cortical neuronal cell cultures we
Jaeger, K. , Weller, R. and Schrems, O. (1991): Photooxidation of carbonyl sulfide (SCO) by ozone studies of the reaction mechanisms in the gas phase and solid argon matrices , Air Pollution Report ...
Yin, C., Mohanad, E. (2009) Simulation of liquid argon flow along a nanochannel: effect of applied force Chinese Journal of Chemical Engineering; 17 (5): ...
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The new Argon Laboratory at RSES has been opened by DVC Professor Margaret Harding and the new RSES Director Professor Steve Eggins.
Fingerprint Dive into the research topics of Pressure-induced argon insertion into an auxetic small pore zeolite. Together they form a unique fingerprint. ...
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We report on the application of a novel all-solid-state violet laser diode source to confocal microscopy. The source has the potential to replace argon ion lasers in a range of fluorescence based imaging systems. Improvements in system performance and image quality through the use of anamorphic prisms to modify the beam profile have been characterised. These modifications have permitted high quality, optically sectioned images to be obtained from laser diodes operating around 406nm. Living mammalian cells stained with a range of biologically significant fluorophores have been imaged. In addition, it has been shown that at this wavelength it is possible to image dyes that normally require excitation with UV argon laser lines.. ...
Titanium and its alloys-including e.g., the wellproven TiAl6V4 alloy or multi-element beta titanium (β-Ti) alloys such as β-TiNb35Zr7Ta5, are lightweight, strong and stable materials used in many industries as well as in biomedical applications. However, they suffer from inferior friction and wear resistance, and this is why a variety of surface modification techniques such as thermal and anodic oxidation, gas nitriding and ion implantation have been subject to numerous studies in connection with surface treatments of titanium materials. In particular, nitriding is seen as a promising (and already proven) method applied to improve the surface (mainly, tribological) properties and corrosion resistance of these materials. An advanced technique adopted to introduce nitrogen into the titanium surface is ion implantation; it can be performed even at low temperatures and is effective when fluences higher than ca. 5·1016 cm−2 are employed. A mixed surface layer containing nitride is formed which ...
Essentially the concept exploits a natural phenomenon we see taking place in space, said Walker. When the solar wind - a plasma of electrified gas released by the Sun - hits the magnetic field of the Earth, it creates a boundary consisting of two plasma layers. Each layer has differing electrical properties and this can accelerate some particles of the solar wind across the boundary, causing them to collide with the Earths atmosphere and create the aurora.. The new ESA study confirms the earlier Australian findings by showing that under carefully controlled conditions, the double layer could be formed and remains stable, allowing the constant acceleration of charged particles in a beam. ESA also confirmed that stable double layers could be created with different propellant gas mixtures.. The double layer was created using a radio antenna wound around a tube. A continuous supply of argon gas was pumped into the tube and the antenna transmitted radio waves which ionized the argon, creating a ...
Successful fabrication by the semiconductor industry of the sophisticated devices that are now ubiquitous depends on highly reliable processing; fundamental to these processes is accurate doping using ion implantation. Industry has well-established methods for validation of a limited number of processes, but research labs need to be able to accurately reproduce a much larger range of processes for a wide variety of purposes. Some examples of these purposes include, in no particular order: establishing processes for the fabrication of new types of devices,1 or devices in new materials;2 simulating defect production in nuclear materials;3 controlled surface modification to improve biofouling behaviour;4 creating new materials impossible to make by equilibrium methods which can involve very different processes such as high fluence implantation5,6 or defect engineering.7 Ion implantation is an intrinsically controllable process, involving ion beams of well-defined energies: the physics of the ...
In this paper, an innovative coaxial-type dielectric barrier discharge plasma generator is proposed to produce the large-volume and visibly uniform cold ar
The PROGENY system provides plasma treatment at 13.56 MHz and accommodates all the common gases, like oxygen, nitrogen, and argon, with high process reproducibility and uniformity.
Jacobsen, W.; Prinzler, H.H. (1998). Siodmak Brothers:. Argon. ISBN 9783870244699. Retrieved 1 August 2015. "The 30th Academy ...
Argon. OCLC 21045272. Flavell, M. Kay (29 March 1994). You have seen their faces: Gisèle Freund, Walter Benjamin and Margaret ...
Reinhard Rürup (1996). 1936, die Olympischen Spiele und der Nationalsozialismus: eine Dokumentation (in German). Argon. p. 123 ...
Argon. ISBN 978-3980959223. Schwenk, Herbert (2002). Lexikon der Berliner Stadtentwicklung [Lexicon of Berlin Urban Development ...
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 ...
CS1 maint: discouraged parameter (link) Schaper, Rüdiger; Rutman, Bob (1998). Berlin um Mitternacht (in German). Argon. OCLC ... Argon, 1998) Hofbauer, Andreas L (2011). "Bob Rutman: Paintings from the 80s". Wonderloch-Kellerland. Retrieved 6 October 2016 ... Fish; Reid; Argon; Xing-Wu Zheng (2005). "Full-Polarization Observations of OH Masers in Massive ...
Argon. ISBN 978-3-87024-785-0. Hans-Günter Lerch, Tschü lowi...Das Manische in Giessen, 1976/2005, reprint edition, page 22, ...
Argon. 720; Arrian, Peripl. p. 14; Anonym. Peripl. p. 3; Xenoph. Anab. vi. 2. § 3; Ov. Epist. ex Pont. x. 47; Memnon, ap. Phot ...
Argon is more expensive than air or oxygen, but considerably less expensive than helium. Argon is a component of natural air, ... Here is an incomplete list of gases commonly present in a diving environment: Argon (Ar) is an inert gas that is more narcotic ... Pilmanis, A.A.; Balldin, U.I.; Webb, J.T.; Krause, K.M. (December 2003). "Staged decompression to 3.5 psi using argon-oxygen ... It is sometimes used for dry suit inflation by divers whose primary breathing gas is helium-based, because of argon's good ...
Argon, 1994. The White Roses of Ravensberg at IMDb v t e. ...
Fosu-Mensah's youth career began with Zeeburgia, before he had spells with AFC, Argon and Almere City. After leaving Almere ... CS1 maint: discouraged parameter (link) "News". SV Argon. 1 January 2014. Retrieved 4 December 2016. CS1 maint: discouraged ...
78 ed.). Berlin: Argon. ISBN 3-87024-254-X. Gilbert, op. cit., p. 70 Dr. Arthur Flehinger, "Flames of Fury", Jewish Chronicle, ...
Argon. ISBN 978-3-87024-291-6. At Ruedesheimer Castle There Is a Lime Tree at IMDb. ...
Moreno, Pepe & Gold, Mike (Introduction) (1990). Batman: Digital Justice, DC Comics Parker, Charley (1997). Argon Zark!, ...
Titan=Titanium; Selen=Selenium; Argon=Argon; Orion=Aurum. The band's official abbreviation is Arcare (アルカレ, Arukare). Titan ( ... Argon (アルゴン, Arugon) voiced by Chiharu Sawashiro (Japanese); Marcus D. Stimac (English)- drums - A sonic gazelle Myumon. Before ...
Eine Geschichte in Streckenplänen (in German). Berlin: Argon. ISBN 3-87024-284-1.. ...
Argon. p. 206. ISBN 3897841754. David Selby (8 September 2018). The Claret. Chelmsford: The Printing Place. p. 44. "Histoire & ...
"The NetApp-Endura team will be known as BORA - ARGON 18". Argon 18. 29 July 2014. Archived from the original on 12 November ... "Report: Bora-Argon 18 to sign Sagan and add Hansgrohe as naming rights sponsor". 30 June 2016. Retrieved 25 ... Benson, Daniel (30 June 2016). "Bora-Argon 18: Sagan is too big a rider for us". Retrieved 25 July 2018. " ... Argon 18, which would also be the team's second title sponsor. During this relationship, a glass kitchen was installed allowing ...
Argon, carried in a small, separate tank connected only to the inflator of the drysuit, is preferred to air, since air conducts ... Argon:0.016; Air:0.024; Helium:0.142 W/mK Vann RD, Vorosmarti J (2002). "Military Diving Operations and Support" (PDF). Medical ... heat 50% faster than argon. Dry suits (if used together with a buoyancy compensator) still require a minimum of inflation to ...
Argon is used in the synthesis of air-sensitive compounds that are sensitive to nitrogen. Solid argon is also used for the ... Similar conditions were used to obtain the first few compounds of argon in 2000, such as argon fluorohydride (HArF), and some ... and argon, one of the noble gases, but failed. Scientists were unable to prepare compounds of argon until the end of the 20th ... to form argon-40, which is the most abundant isotope of argon on Earth despite being relatively rare in the Solar System. This ...
... so technical divers breathing gases containing helium may inflate their dry suits with argon. Argon: 16 mW/m/K; air: 26 mW/m/K ... "Why Argon". Author. Retrieved 2011-04-11. Luria SM, Kinney JA (March 1970). "Underwater vision". Science. 167 (3924): 1454-61. ... Nuckols ML, Giblo J, Wood-Putnam JL (September 15-18, 2008). "Thermal Characteristics of Diving Garments When Using Argon as a ... and argon conducts heat slower than air, ...
74-79 ed.). Berlin: Argon. ISBN 3-87024-254-X. United States Holocaust Memorial Museum (ed.) (2008). Do Not Stand Silent: ... Geschichte und Geschichten einer Lebenswelt in der Mitte Berlins, Gesellschaft Hackesche Höfe e.V. (ed.), Berlin: Argon, 1993, ... Geschichte und Geschichten einer Lebenswelt in der Mitte Berlins, Gesellschaft Hackesche Höfe e.V. (ed.), Berlin: Argon, 1993, ...
"18 Argon". Retrieved 2008-09-12. "63 Europium". Retrieved 2008-09-12. "10 ...
Orpheus, Argon. 460. Coins from Homolium Richard Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World. Princeton ...
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Berlin: Argon 1990. Pp. 195-210, p. 195. Willett (1978, 166). Alexander Stephan: Im Visier des FBI. Deutsche Exilschriftsteller ...
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Berlin: Argon Verlag. ISBN 978-3-87024-148-3. Nowell-Smith, Geoffrey, ed. (2009). The Oxford History of World Cinema. Oxford ...
Argon is also used for blue and green argon-ion lasers. Argon is used for thermal insulation in energy-efficient windows. Argon ... Also, potassium-argon dating and related argon-argon dating is used to date sedimentary, metamorphic, and igneous rocks. Argon ... Argon makes a distinctive blue-green gas laser. Argon is also used in fluorescent glow starters. Argon has approximately the ... Argon has several desirable properties: Argon is a chemically inert gas. Argon is the cheapest alternative when nitrogen is not ...
Details of brocaded patterns on an argon. Women traditionally use the Argon to cover their left shoulder. Chiwar Phul motif ... An Argon (also called Agon, Agrun or Parsa) is a traditional shawl-like garment worn by Hajong women in the Indian subcontinent ... Traditional Hajong ornaments placed upon an Argon. Pathin Dupatta Sabai Hajong people In appearance and dress the people are ...
... argon: The production of argon-40 from potassium-40 decay is utilized as a means of determining Earths age (potassium-argon ... significance in potassium-argon dating. *. In argon. The production of argon-40 from potassium-40 decay is utilized as a means ... In dating: Potassium-argon methods. …of mass 40 (40K) to argon gas of mass 40 (40Ar) formed the basis of the first widely used ... Since radiogenic argon-40 was first detected in 1938 by the American geophysicist Lyman T. Aldrich and A.O. Nier, the method ...
Page: Tree of Life Argon Evans 1955. Argon lota (Hewitson 1877). Authored by Andrew V. Z. Brower. The TEXT of this page is ... Argon Evans 1955. Argon lota (Hewitson 1877) Andrew V. Z. Brower Containing group: Calpodini ... Argon Evans 1955. Argon lota (Hewitson 1877). Version 04 March 2007 (under construction). ...
O2s Argon has definite appeal as an upgrade to the Xda IIi , but more up-to-date features like Windows Mobile 6, 3G and ... The Xda Argon is heavy at 200g and bulky at 129.7mm tall by 69.8mm wide by 18.8mm thick. All Windows Mobile Pocket PCs used to ... The Xda Argon comes with mains power adapter, USB cable for PC connectivity and stereo headset, all of which share the same ... O2s updated Xda Argon fits into the current portfolio of Xda devices neatly enough. If youre currently using an Xda IIi and ...
... 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. ...
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A noisy ball of argon gas takes us maddeningly close to redefining the unit of absolute temperature, the kelvin, in terms of a ... This article appeared in print under the headline "Sweet argon music helps redefine temperature" ... De Podesta and his colleagues filled a copper vessel with a known volume of argon gas. A gass energy is related to the average ... By playing notes through the vessel at many frequencies, the team determined the speed of sound in the argon, and the energy of ...
Subsequently, two new argon-containing bound metastable compounds FArCCH and FArSiF3 were predicted theoretically11. The argon ... Cohen, A., Lundell, J. & Gerber, R. B. First compounds with argon-carbon and argon-silicon chemical bonds. J. Chem. Phys. 119, ... How to cite this article: Li, X. et al. Stable Lithium Argon compounds under high pressure. Sci. Rep. 5, 16675; doi: 10.1038/ ... Argon (Ar) is chemically quite inert due to its closed-shell electronic configuration1,2. Therefore, Ar is very reluctant to ...
... by Jim Theis The Eye of Argon: Chapter 1 The Eye of Argon: Chapter 2 The Eye of Argon: Chapter 3 The Eye of Argon: Chapter 3 1/ ... The Eye of Argon, by Jim Theis. *The Eye of Argon: Chapter 1 *The Eye of Argon: Chapter 2 *The Eye of Argon: Chapter 3 *The Eye ... The Eye of Argon: Chapter 4 *The Eye of Argon: Chapter 5 *The Eye of Argon: Chapter 6 *The Eye of Argon: Chapter 7 *The Eye of ... The Eye of Argon: Chapter 6. The Eye of Argon: Chapter 4. Oozing with a non-specific malice. The Eye of Argon: Chapter 5. The ...
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 ...
Kann das ARGON AM PI auch mit der PINION C-Line ausgestattet werden?. Ja, es ist möglich die C-Line zu verbauen. Bitte fragt in ... Kann das ARGON AM auch mit 26 Laufrädern gefahren werden?. Ja, der Rahmen kann auch mit 26 Laufrädern aufgebaut werden. Es ... Stückliste ARGON AM - SLIDE. Änderungen jederzeit vorbehalten / specifications may change without notice. Stand: 20.09.2017. ...
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The ride of the Argon FR is equally uncompromising as the visual impact as well.The FactsWith a price more than double that of ... most frames here, Nicolai needs to stand up to justify it, and the Argon has no difficulty doing that. ... Nicolai Argon FR review. No one builds bikes as brutally beautiful as Nicolai, and even its hardtails are showpieces of ... With a price more than double that of most frames here, Nicolai needs to stand up to justify it, and the Argon has no ...
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 ...
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 ...
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Get free shipping on qualified Argon Gas Insulated Double Hung Windows or Buy Online Pick Up in Store today in the Doors & ... The most common feature for Double Hung Windows is argon gas insulated.. ...
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 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 ...
  • 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. (
  • Argon is chemically inert under most conditions and forms no confirmed stable compounds at room temperature. (
  • [6] Argon is chemically inert under most conditions and forms no confirmed stable compounds at room temperature. (
  • Argon (Ar) , chemical element , inert gas of Group 18 ( noble gases ) of the periodic table , terrestrially the most abundant and industrially the most frequently used of the noble gases. (
  • The outermost (valence) shell of argon has eight electrons , making it exceedingly stable and, thus, chemically inert. (
  • Argon is used to provide an inert blanket for certain industrial operations. (
  • The name of one of them - argon - derives from the Greek word for idle, to emphasise its highly inert nature. (
  • In particular, argon is the cheapest alternative when diatomic nitrogen is not sufficiently inert. (
  • He also points out that calculations based on Earth's budget of inert - or unreactive - gases agree with the traditional model of how argon escapes into the atmosphere. (
  • The principle of radio-frequency plasma powder balling technology refers to that inert gas (like argon ) is ionized under the effect of high-frequency power supply. (
  • Coherent EPIC IV YAG/ARGON COMBO This is a Coherent Epic YAG and Coherent Ultima 2000 combo laser system. (
  • This is a very clean combo system that features both a Coherent Novus 2000 Argon and a coherent 7901 Yag. (
  • 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. (
  • Curiosity's Sample Analysis at Mars instrument sniffed the Martian atmosphere and counted up the isotopes of argon in the air. (
  • The researchers looked at two isotopes of argon: the heavier argon-38 and the lighter argon-36. (
  • By measuring light and heavy isotopes of argon in the Martian atmosphere, scientists have determined that the majority of the planet's air and water were removed to space by sputtering . (
  • The symbol for argon is Ar , and its atomic number (or proton number) is 18. (
  • Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv). (
  • Argon is the most abundant noble gas in Earth's crust, comprising 0.00015% of the crust. (
  • Nearly all of the argon in the Earth's atmosphere is radiogenic argon-40, derived from the decay of potassium-40 in the Earth's crust. (
  • Argon constitutes 0.934% by volume and 1.288% by mass of the Earth's atmosphere. (
  • The production of argon-40 from potassium-40 decay is utilized as a means of determining Earth's age (potassium-argon dating). (
  • Argon-36 and argon-38 make up 0.34 and 0.06 percent of Earth's argon, respectively. (
  • A major portion of terrestrial argon has been produced, since the Earth's formation, in potassium -containing minerals by decay of the rare, naturally radioactive isotope potassium-40 . (
  • Why are nitrogen and argon present in the earth's atmosphere? (
  • Argon is present in the Earth's atmosphere at slightly less than 1%, making it the most common noble gas on Earth. (
  • 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 Earth's mantle and move through these minerals at a much slower rate than previously thought. (
  • Its steady personality makes argon an ideal marker for understanding the dynamics of Earth's interior. (
  • By measuring the behavior of argon in minerals, we can begin to retrace the formation of Earth's atmosphere and understand how and if complete degassing has occurred," Watson explained. (
  • The team heated magnesium silicate minerals found in Earth's mantle, which is the region of Earth sandwiched between the upper crust and the central core, in an argon atmosphere. (
  • Bruce Watson at Rensselaer Polytechnic Institute in Troy, N.Y., and his colleagues heated olivine and orthopyroxene - the two main minerals composing Earth's mantle - in an argon atmosphere. (
  • Argon is also used in making "neon" lamps and in lasers. (
  • 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. (
  • 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. (
  • The power and pointing stability and the beam quality of solid-state lasers are competitive with those of argon lasers. (
  • Argon has approximately the same solubility in water as oxygen and is 2.5 times more soluble in water than nitrogen. (
  • 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. (
  • The Nitrogen is a meeting of worlds, sharing Argon 18's successful race geometry from its Gallium road bikes with the aero profiling optimised from the brand's TT bikes. (
  • Argon 18 moved its Nitrogen aero road range to a disc-only format last year, redesigning the Nitrogen frame to accommodate the new brake system. (
  • Argon is inexpensive since it is a byproduct of the production of liquid oxygen and liquid nitrogen , both of which are used on a large industrial scale. (
  • Argon makes up 1% of the air and is isolated by removing nitrogen, oxygen, carbon dioxide and water from air. (
  • The identification of atmospheric nitrogen with that contained in niter and nitric acid is due to Henry Cavendish, whose exact and skillful work not only established this fact, but led to an observation of great interest in connection with the discovery of argon. (
  • but the explanation lies largely in the fact that argon forms no compounds, so far as is known, and thus fails to assert itself in the presence of the almost equally indifferent nitrogen with which it is mixed. (
  • Background: This study aimed to study the clinical efficacy of argon plasma coagulation plus cryotherapy for central airway stenosis caused by lung cancer. (
  • According to different treatments, 43 patients received cryotherapy were included in the control group, while 134 patients received argon plasma coagulation plus cryotherapy were in the observation group. (
  • Conclusions: Argon plasma coagulation combined with cryotherapy can significantly alleviate the central airway stenosis caused by lung cancer, reduce the incidence of adverse reactions, and improve prognosis in patients. (
  • The purpose of this study is to use transesophageal echocardiography (TEE) to determine the incidence, severity, and clinical significance of gas bubbles during argon plasma coagulation (APC). (
  • Non-Contact Coagulation - Long, controlled argon beam can be initiated without contacting the mucosa. (
  • Targeted Therapy - The ceramic tip effectively guides the argon beam for precise and controlled coagulation at a low argon flow rate. (
  • Snare, Resect, Ablate - When it comes to challenging lesions and mucosal resection, argon beam coagulation can now be achieved with the same instrument. (
  • The Beamer ® Argon Snare Probe's retractable snare and argon probe allow en bloc or piecemeal EMR followed immediately by argon beam coagulation and ablation of residual tissue. (
  • As a result, most rock contains at least one mineral which can be successfully dated by the potassium argon method. (
  • 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. (
  • 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. (
  • Naughton, J. J. , 1963 - Possible use of argon-39 in the potassium-argon method of age determination . (
  • Argon hydride is produced when ions of argon (Ar + ) react with hydrogen molecules (H 2 ), but these two species are usually found in different regions of a nebula. (
  • There, argon ions can react with hydrogen molecules forming argon hydride and atomic hydrogen. (
  • [2] Also argon-containing ions e.g. (
  • Argon is one of the noble gases. (
  • Scientists used measurements of light and heavy argon from MAVEN and NASA's Curiosity rover to determine that sputtering has removed 65% of Mars' argon to space, along with the majority of other gases like carbon dioxide. (
  • Argon has atomic number 18 and is the third element in group 18 of the periodic table ( noble gases ). (
  • Argon became the first member of the noble gases to be discovered. (
  • Other noble gases would probably work as well in most of these applications, but argon is by far the cheapest. (
  • Argon and other noble gases are tracer elements for scientists because they are very stable and do not change over time, although certain isotopes accumulate through radioactive decay. (
  • We can no longer assume that a partly melted region of the mantle will be stripped of all argon and, by extension, other noble gases. (
  • Scientists have long thought of argon-40 as a prime candidate to study how Earth releases gases. (
  • What reactive gases are used with argon for GMA welding on steels? (
  • 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. (
  • The team of astronomers has detected emission from argon hydride (ArH + ), a molecular ion containing the noble gas argon, in the Crab Nebula. (
  • Clinical efficacy of argon plasma. (
  • Can foveal cone electroretinogram (FCERG) be a useful diagnostic test in evaluation of efficacy of argon laser treatment in eyes with exudative (wet) age-related macular degeneration (AMD)? (
  • The abundance of argon in the atmosphere is about 0.93 percent. (
  • Colourless, odourless, and tasteless, argon gas was isolated (1894) from air by the British scientists Lord Rayleigh and Sir William Ramsay . (
  • 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). (
  • Argon was discovered in 1894. (
  • 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. (
  • Argon is a chemical element with the symbol Ar and atomic number 18. (
  • The complete octet (eight electrons) in the outer atomic shell makes argon stable and resistant to bonding with other elements. (
  • The result is that potassium has a lower atomic mass (or atomic weight) than argon, despite having the extra proton. (
  • The name takes influence from frame manufacturing, Argon being the gas that is used to weld frames and 18 being its atomic number. (
  • Conventional wisdom also holds that individual argon atoms do not get trapped inside the crystal lattices of the upwelling mantle minerals. (
  • 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. (
  • Although argon is a noble gas, it can form some compounds under various extreme conditions. (
  • Although the neutral ground-state chemical compounds of argon are presently limited to HArF, argon can form clathrates with water when atoms of argon are trapped in a lattice of water molecules. (
  • Theoretical calculation predicts several more argon compounds that should be stable but have not yet been synthesized. (
  • Therefore, while the chemistry of Xe has developed quickly, over the last decades many scientists also tried to stabilise compounds of Argon. (
  • Providing new physical stimuli might be a promising avenue to enrich the chemistry of argon beyond these few metastable bound compounds. (
  • Although argon is a noble gas , it has been found to have the capability of forming some compounds. (
  • Theoretical calculations on computers have shown several argon compounds that should be stable but for which no synthesis routes are currently known. (
  • FRISCO, Texas , Jan. 22, 2020 /PRNewswire/ -- Argon Medical Devices, Inc. announced today the commercial launch of Single-Loop and Triple-Loop Retrieval Kits for sale in the U.S. The Single-Loop and Triple-Loop Retrieval Kits are intended for percutaneous removal of retrievable inferior vena cava (IVC) filters that are no longer medically required, via a jugular approach. (
  • Until recently, Argon 18 was the sponsors of UCI WorldTour team Astana Pro Team , and before that, title sponsor of Bora-Argon 18 . (
  • 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. (
  • Smith 32-80-580-6 Argon/CO2 Single Stage Flowmeter Regulator Click an Image to Enlarge SM32-80-580-6 Welcome to the Weldfabulous eBay store! (
  • potassium-argon dating A dating technique for certain rocks that depends on the decay of the radioisotope potassium-40 to argon-40, a process with a half-life of about 1.27 × 10 10 years. (
  • It assumes that all the argon-40 formed in the potassium-bearing mineral accumulates within it and that all the argon present is formed by the decay of potassium-40. (
  • potassium-argon dating ( K-Ar method ) Geologic dating technique based on the radioactive decay of potassium ( 40 K) to argon ( 40 Ar). (
  • Most argon is made by radioactive decay of potassium-40. (
  • One of the isotopes of potassium, potassium-40 is radioactive , and may decay into Argon -40. (
  • Our data suggest that argon does indeed stay trapped in the mantle even at extremely high temperatures, making it difficult for the Earth to continuously purge itself of argon produced by radioactive decay of potassium. (
  • Radioactive decay inside Earth is the only known source of argon-40, which means that all of it in today's atmosphere must have come from deep below. (
  • Argon is constantly being formed from the radioactive decay of K-40 (an isotope of potassium). (
  • This page provides comprehensive nuclide information for the element element Ar - Argon including: nuclide decay modes, half-life, branch ratios, decay energy, etc. (
  • 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. (
  • Argon (Greek ἀργόν, neuter singular form of ἀργός meaning "lazy" or "inactive") is named in reference to its chemical inactivity. (
  • The name argon comes from the Greek word argos, "the lazy one. (
  • 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). (
  • In fact, no compound of argon has ever been produced. (
  • A compound of argon, the molecule was detected in the gaseous filaments of the Crab Nebula, one of the most famous supernova remnants in our Galaxy. (
  • 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. (
  • While argon is a product of supernova explosions, the formation and survival of argon-based molecules in the harsh environment of a supernova remnant is an unforeseen surprise. (
  • The Xda Argon comes with mains power adapter, USB cable for PC connectivity and stereo headset, all of which share the same mini-USB connector on the bottom edge of the casing. (
  • High quality argon gas pressure regulator for MIG/MAG+TIG specialty applications. (
  • for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. (
  • Argon constitutes 1.288 percent of the atmosphere by weight and 0.934 percent by volume and is found occluded in rocks. (
  • Some of that missing argon-36 must have escaped because the top of the atmosphere had started to blow away, they surmised. (
  • About 1% of the Earth 's atmosphere (the air around us) is argon. (
  • But there is some argon in our atmosphere--slightly less than 1 percent. (
  • A team of researchers, including from left to right, Jay Thomas, Daniele Cherniak and Bruce Watson, recently discovered that argon may not act as once thought on its way from the core-mantle boundary to the atmosphere. (
  • The results show that argon actually likes to sit in these minerals and that it would be difficult to get them out into the atmosphere during melting," Watson says. (
  • Argon also has all of its electrons in the 3rd valence shell. (
  • Also, K+ now has the same number of electrons as Argon. (
  • 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+. (
  • Potassium 1+ acts like argon a little with the number of electrons. (
  • The argon atom does not want to give or receive or give electrons because it is already as stable as possible. (
  • The remaining oxygen was reacted with alkaline pyrogallate to leave behind an apparently non-reactive gas which they called argon. (
  • Concentration profiles for radical species in a methane-oxygen-argon flame. (
  • 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. (
  • 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. (
  • 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 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. (
  • By comparing the 2 graphs, an accurate determination can be made of the amount of argon contamination in the high purity oxygen. (
  • 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. (
  • Lord Rayleigh 's method for the isolation of argon, based on an experiment of Henry Cavendish 's. (
  • However, English scientist Henry Cavendish (1731-1810) had predicted the existence of argon 200 years earlier. (
  • Argon is used as shielding/backing gas for electrical welding. (
  • Although the stable isotopes argon-36 and argon-38 make up all but a trace of this element in the universe, the third stable isotope, argon-40, makes up 99.60 percent of the argon found on Earth. (
  • Its full outer shell makes argon stable and resistant to bonding with other elements. (
  • The spinal hose has a reactive valve to vent argon to the weld chamber. (
  • 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. (
  • To help enhance patient outcomes, Beamer ® Argon Probes were designed with a range of features that help physicians quickly, accurately and safely coagulate bleeding tissue. (
  • Infographic explaining the MAVEN argon results. (
  • So you can easily average speed test results, compare maximum speeds and research logged results for Argon Technologies. (
  • The results show that argon could stay in the mantle even after being exposed to extreme temperatures," Watson said. (
  • This report is a compilation of the results of the potassium-argon dating of the Tertiary volcanic field of trans-pecos Texas. (
  • Herschel image and spectrum of the Crab Nebula, with emission lines from the molecular ion argon hydride. (
  • There, in the transition regions between ionised and molecular gas, argon hydride can form and survive, ' explains Barlow. (
  • 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. (
  • 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. (
  • Any device intended to displace the air-cooled argon laser from its dominance in medical instrumentation, therefore, must come very close to the latter's 488-nm wavelength. (
  • Sapphire's 488-nm beam matches the wavelength of an argon-ion laser. (
  • By 2006 Argon released its first full carbon-fibre frameset, the Gallium Pro which set the brand on a path of innovation. (
  • Argon 18 states the Gallium Pro frame weighs in at a svelte 814g for a medium (Pro Disc Anniversary Edition) which has been achieved by optimising the carbon layup schedule. (
  • Argon makes a distinctive blue-green gas laser. (
  • The specifications to the right are measured data for Thorlabs' argon ion laser mirrors. (
  • Argon laser system with control panel, foot switch,operator's manual, and safety eye wear. (
  • Bilateral femoral, carotid or jugular vessels were studied with one repair (control) closed with interrupted 6-0 polypropylene sutures, and the contralatral repair (experimental) welded with the argon laser. (
  • Photoionization of uranium atoms by UV lines, 3511 A and 3345 A, of an argon ion laser was observed and attributed due to resonant two-photon ionization. (
  • Symmetric design and axial airflow in the cylindrical argon ion laser heads provide the best mechanical package to ensure optimum beam-pointing stability and fast warm-up. (
  • In this clinical trial study,the investigators intend to compare two methods of trichiasis treatment.One by argon laser and the other by radiofrequency then compare the result of these procedures, especially, the investigators would like to compare which of these have less complications such as bleeding,pain,notch in the site of surgery and etc. (
  • The venerable air-cooled argon-ion laser appears to be the next target on solid-state technology's hit list. (
  • Developed at Spectra-Physics in the early 1970s by a group led by John Goldsborough, the air-cooled argon-ion laser has found broad applications, including in the medical field, in graphics and in semiconductor inspection. (
  • Indeed, 30 years later, cell sorting has grown into a major application of the argon-ion laser. (
  • So why would one wish to replace an argon-ion laser with a solid-state device? (
  • In fact, they found that even volcanic activity is unlikely to dislodge argon atoms from their resting places within the mantle. (
  • The inelastic scattering functions for liquid argon have been measured at 85.2 K. The coherent scattering function was obtained from a measurement on pure A-36 and the incoherent function was derived from the result obtained from the A-36 sample and the result obtained from a mixture of A-36 and A-40 for which the scattering is predominantly incoherent. (
  • 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. (
  • Once the purge dam system has been positioned with the primary and secondary dams on either side of the weld the flow of argon to the purge dams can begin. (
  • In cosmic abundance, argon ranks approximately 12th among the chemical elements. (
  • Argon is a chemical element . (
  • Argon ( pronounced /ˈɑrgɒn/ ) is a chemical element designated by the symbol Ar . (
  • The Argon from Caterpillar is a work boot/work shoe hybrid that features a nylon shank with strobel and cement construction. (
  • The automatic sanitization and redaction features in ARgon for Email remove only the elements that can cause potential data breaches, allowing safe communications to continue unimpeded. (
  • Today, BlackBerry creator RIM revealed new features of its next generation BlackBerry Enterprise Server (BES) 5.0 platform, code-named Argon, including security aspects and the MVS mobile voice system. (
  • Insulating glass unit size, geometry and addition of internal grilles, etc. can negatively influence the effectiveness of the argon filling process and the resulting percentage of argon in the air space. (
  • Argon system operating at manufacturers full specifications. (