Warning: preg_replace(): Compilation failed: unmatched parentheses at offset 5 in /home/lookformedical/www/faq.php on line 155
  • spectra
  • These properties allow the thiocyanates to be easily distinguished from isothiocyanates whose NH3-CI mass spectra indicate considerable fragmentation but little, or no, adduct ion formation. (gc.ca)
  • The phosphitylated sample is then scanned using liquide state 31P-NMR spectroscopy and the hydroxyl groups are quantified by integration of the corresponding signals from obtained 31P-NMR spectra. (wikipedia.org)
  • Operando (Latin for working) spectroscopy refers to continuous spectra collection of a working catalyst, allowing for simultaneous evaluation of both structure and activity/selectivity of the catalyst. (wikipedia.org)
  • The purpose of operando spectroscopy is to measure the catalytic changes that occur within the reactor during operation using time-resolved and spatially resolved spectra. (wikipedia.org)
  • organic
  • One of the first researchers to illustrate the potential of coupled gas chromatography-mass spectrometry in organic geochemistry, Eglinton also pioneered the use of infrared spectroscopy to characterise both inter- and intra-molecular hydrogen bonding. (wikipedia.org)
  • Breath gas analysis is a method for gaining non-invasive information on the clinical state of an individual by monitoring volatile organic compounds present in the exhaled breath. (wikipedia.org)
  • The area of modern breath testing commenced in 1971, when Nobel Prize winner Linus Pauling demonstrated that human breath is a complex gas, containing more than 200 different volatile organic compounds. (wikipedia.org)
  • Spectrometer
  • A new system, the Proton Transfer Reaction Time of Fight Mass Spectrometer, is particularly interesting because it can identify specific chemicals in the nasal cavity and link those to sensory perceptions. (sigmaaldrich.com)
  • Thomson's student Francis William Aston continued the research at the Cavendish Laboratory in Cambridge, building the first full functional mass spectrometer that was reported in 1919. (wikipedia.org)
  • In 1918, Arthur Jeffrey Dempster reported on his mass spectrometer and established the basic theory and design of mass spectrometers that is still used to this day. (wikipedia.org)
  • Dempster's research over his career centered around the mass spectrometer and its applications, leading in 1935 to his discovery of the uranium isotope 235U. (wikipedia.org)
  • A Calutron is a sector mass spectrometer that was used for separating the isotopes of uranium developed by Ernest O. Lawrence during the Manhattan Project and was similar to the Cyclotron invented by Lawrence. (wikipedia.org)
  • TGA (thermogravimetry) or DSC (differential scanning calorimetry), with a fast Quadrupole Mass Spectrometer (QMS) the detection of gas separation and identification of the separated components are possible in exact time correlation with the other thermal analysis signals. (wikipedia.org)
  • thermal
  • An EGA instrument named the Thermal and Evolved-Gas Analyzer was flown on the Phoenix Lander probe that reached Mars in May 2008. (wikipedia.org)
  • Analysis
  • Refer to Gel Permeation Chromatography (GPC), but a cross-linked polymer is often used in SEC as the stationary phase that can withstand higher pressures for the analysis of polymers with higher chromatographic resolution compares with GPC. (anthias.co.uk)
  • Human body fluids collected at crime scenes can be classified from their constituent proteins in a single mass spectrometric experiment that can be combined with DNA analysis for suspect identification. (spectroscopynow.com)
  • Simultaneous analysis of abundance and isotopic composition of nitrogen, carbon, and noble gases in lunar basalts: insights into interior and surface processes on the Moon. (open.ac.uk)
  • It is either possible just to detect evolved gases using evolved gas detection (EGD) or to analyse explicitly which gases evolved using evolved gas analysis (EGA). (wikipedia.org)
  • Breath gas analysis is used in a number of breath tests. (wikipedia.org)
  • rapidly
  • The use of electromagnetic focusing in mass spectrograph which rapidly allowed him to identify no fewer than 212 of the 287 naturally occurring isotopes. (wikipedia.org)
  • hydrogen
  • The exact mass of many isotopes was measured leading to the result that hydrogen has a 1% higher mass than expected by the average mass of the other elements. (wikipedia.org)
  • conditions
  • The name change from in situ to operando for the research field of spectroscopy of catalysts under working conditions was proposed at the Lunteren congress. (wikipedia.org)
  • Supplemental HMB has been used in a number of clinical trials as a treatment for preserving lean body mass in muscle wasting conditions, particularly sarcopenia, and has been studied in clinical trials as an adjunct therapy in conjunction with resistance exercise. (wikipedia.org)
  • Industrial
  • Crocombe received the Williams-Wright Award for Industrial Spectroscopy in 2013. (photonics.com)
  • Argon constitutes 0.934% by volume and 1.288% by mass of the Earth's atmosphere, and air is the primary industrial source of purified argon products. (wikipedia.org)
  • Research
  • The first metabolite database(called METLIN) for searching m/z values from mass spectrometry data was developed by scientists at The Scripps Research Institute in 2005. (wikipedia.org)
  • neon
  • The first such discovery was with the element neon, which was shown by mass spectrometry to have at least two stable isotopes: 20Ne (neon with 10 protons and 10 neutrons) and 22Ne (neon with 10 protons and 12 neutrons). (wikipedia.org)
  • temperature
  • An advanced sample introduction technique that uses a combination of temperature, gas flow and vent valve position to control the transfer of sample components onto the capillary column or discharge through the vent valve. (anthias.co.uk)
  • To determine the dry matter content, The sample is dried at a temperature of 105 °C ± 2 °C. The mass before and after the drying is determined gravimetrically. (wikipedia.org)
  • evolution
  • Further, it was noted that further progress in the field depended in large part, through addressing otherwise "irresolvable technical challenges", by technical evolution of mass spectrometry instrumentation. (wikipedia.org)
  • state
  • Solid-state synthesis, gas-phase-synthesis, ionic liquids, phase-transfer catalysis, macrocycle synthesis, these terms have gained new meaning since I had first read about them in a textbook in May (it seems so long ago). (reed.edu)
  • field
  • In 1907 a study of how this "ray" was deflected in a magnetic field, revealed that the particles making up the ray were not all the same mass. (wikipedia.org)
  • study
  • The study of gas discharges in the mid 19th century led to the discovery of anode and cathode rays, which turned out to be positive ions and electrons. (wikipedia.org)
  • however, the trial did not adequately test the ability of Juven to prevent or reverse the loss of lean body mass in individuals with cancer cachexia since the majority of participants did not complete the study. (wikipedia.org)
  • shown
  • In healthy adults, supplementation with HMB has been shown to increase exercise-induced gains in muscle size, muscle strength, and lean body mass, reduce skeletal muscle damage from exercise, improve aerobic exercise performance, and expedite recovery from exercise. (wikipedia.org)
  • Juven, a nutrition product which contains 3 grams of HMB-Ca, 14 grams of L-arginine, and 14 grams of L-glutamine per two servings, has been shown to improve lean body mass during clinical trials in individuals with AIDS and cancer, but not rheumatoid cachexia. (wikipedia.org)
  • complex
  • These factors are related to both the breath sampling protocols as well as the complex physiological mechanisms underlying pulmonary gas exchange. (wikipedia.org)