| D009930 |
Organic Chemicals |
A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form. |
Organic Chemical,Chemical, Organic,Chemicals, Organic |
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| D009943 |
Organophosphorus Compounds |
Organic compounds that contain phosphorus as an integral part of the molecule. Included under this heading is broad array of synthetic compounds that are used as PESTICIDES and DRUGS. |
Organophosphorus Compound,Organopyrophosphorus Compound,Organopyrophosphorus Compounds,Compound, Organophosphorus,Compound, Organopyrophosphorus,Compounds, Organophosphorus,Compounds, Organopyrophosphorus |
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| D002851 |
Chromatography, High Pressure Liquid |
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. |
Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance |
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| D000478 |
Alkylation |
The covalent bonding of an alkyl group to an organic compound. It can occur by a simple addition reaction or by substitution of another functional group. |
Alkylations |
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| D012680 |
Sensitivity and Specificity |
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed) |
Specificity,Sensitivity,Specificity and Sensitivity |
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| D012997 |
Solvents |
Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed) |
Solvent |
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| D013048 |
Specimen Handling |
Procedures for collecting, preserving, and transporting of specimens sufficiently stable to provide accurate and precise results suitable for clinical interpretation. |
Specimen Collection,Collection, Specimen,Collections, Specimen,Handling, Specimen,Handlings, Specimen,Specimen Collections,Specimen Handlings |
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| D019032 |
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization |
A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis. |
Laser Desorption-Ionization Mass Spectrometry, Matrix-Assisted,MALD-MS,MALDI,Mass Spectrometry, Matrix-Assisted Laser Desorption-Ionization,Mass Spectroscopy, Matrix-Assisted Laser Desorption-Ionization,Matrix-Assisted Laser Desorption-Ionization Mass Spectrometry,Spectroscopy, Mass, Matrix-Assisted Laser Desorption-Ionization,MALDI-MS,MS-MALD,SELDI-TOF-MS,Surface Enhanced Laser Desorption Ionization Mass Spectrometry,Laser Desorption Ionization Mass Spectrometry, Matrix Assisted,MALDI MS,Mass Spectrometry, Matrix Assisted Laser Desorption Ionization,Mass Spectroscopy, Matrix Assisted Laser Desorption Ionization,Matrix Assisted Laser Desorption Ionization Mass Spectrometry |
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| D021241 |
Spectrometry, Mass, Electrospray Ionization |
A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry. |
ESI Mass Spectrometry,Electrospray Ionization Mass Spectrometry,Mass Spectrometry, ESI,Spectrometry, ESI Mass |
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