Results 21 to 30 of about 141,863 (280)

Determination of gamma-hydroxybutyric acid in dried blood spots using a simple GC-MS method with direct 'on spot' derivatization [PDF]

, 2010
The objective of this study was the development of an accurate and sensitive method for the determination of gamma-hydroxybutyric acid (GHB) in dried whole blood samples using a GC-MS method.
Ingels, Ann-Sofie, Lambert, Willy, Stove, Christophe   +2 more
core   +1 more source

The Development of an Ultra-Performance Liquid Chromatography–Tandem Mass Spectrometry Method for Biogenic Amines in Fish Samples

Molecules, 2022
Biogenic amines (BAs) are a group of substances that are formed from amino acids by decarboxylation or amination and transamination of aldehydes and ketones. They may have either an aliphatic, aromatic, or heterocyclic structure.
Tong Li, Ruiguo Wang, Peilong Wang
doaj   +1 more source

Fast determination of biogenic amines in beverages by a core-shell particle column [PDF]

, 2015
A fast and reliable HPLC method for the determination of 11 biogenic amines in beverages has been performed. After pre-column derivatization with dansyl-chloride a Kinetex C18 core–shell particle column (100 mm × 4.6 mm, 2.6 μm particle size) has been ...
Giuliana Vinci, Marta Letizia Antonelli, Raffaella Preti, Roberta Bernacchia   +3 more
core   +1 more source

Determination of methionine in malt.

Kvasný průmysl, 2009
Volatile sulphur substances play an important role in sensory beer quality. Their precursors are sulphur amino acids, first of all sulphur amino acid metionine.
Renata MIKULÍKOVÁ, Zdeněk SVOBODA, Karolína BENEŠOVÁ, Sylvie BĚLÁKOVÁ   +3 more
doaj   +1 more source

Development, Validation and Approbation Analytical Method for the Quantitative Determination of Taurine by HPLC-UV Method in the Test of Comparative Dissolution Kinetics

Разработка и регистрация лекарственных средств, 2023
Introduction. Taurine is a non-proteinogenic amino acid. The molecule is involved in lipid metabolism, adsorbs fat-soluble vitamins, and its conjugates with bile acids contribute to the emulsification of fats in the intestine.
A. M. Poluyanov, A. Kochug, L. S. Mitrofanova, I. D. Nikitin, O. Yu. Vergasov, I. E. Shohin, E. N. Fisher   +6 more
doaj   +1 more source

Analytical methods in wineries: is it time to change? [PDF]

, 2005
A review of the methods for the most common parameters determined in wine—namely, ethanol, sulfur dioxide, reducing sugars, polyphenols, organic acids, total and volatile acidity, iron, soluble solids, pH, and color—reported in the last 10 years is ...
Andersen S. K., Anon, Arnes S., Belton P. S., Bi L. J., Billingsley A., Cardwell T. J., Cardwell T. J., Chen S. G., Chmilenko F. A., Cserhati T., Dai G. S., Dell´Oro V., Edberg U., Escobal A., Fang G. Z., Feng Z., Ga R. D., Gao Z. F., González-Rodríguez J., Guan J. R., Hu J. Y., J. González-Rodríguez, Kaufmann A., Kawamura Y., Kosir I. J., Kupina S. A., Lodi G., Luo H. Q., M. D. Luque de Castro, Mannino S., Miao J. G., Mou S., Olalla M., P. Pérez-Juan, Patz C. D., Polo M. C., Rapp A., Ribereau-Gayon J., Scollary G. R., Sebecic B., Vereda-Alonso E., Wang J. H., Wang J. S., Wang X. H., Wu X., Wu X. L., Yan J., Yu H., Zhang W., Zhang W., Zhou H.   +51 more
core   +1 more source

An on-line solid phase extraction procedure for the routine quantification of urinary methylmalonic acid by liquid chromatography-tandem mass spectrometry [PDF]

, 2010
Background: The goal of this study was to develop and to validate an improved isotope-dilution-liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of methylmalonic acid (MMA) in urine.
Bolann BJ, Klee GG, Kushnir MM, Magera M, Rasmussen K   +4 more
core   +1 more source

Recent applications of the derivatization techniques in capillary electrophoresis

Journal of Pharmaceutical and Biomedical Analysis Open, 2023
The main reasons for performing derivatization in capillary electrophoresis are largely the same as for liquid chromatography, however there are specific aspects in electrokinetic separations where derivatization plays specific roles.
Roberto Gotti, Benedetta Pasquini, Serena Orlandini, Sandra Furlanetto   +3 more
doaj   +1 more source

Further characterization of glycine-containing microcystins from the McMurdo Dry Valleys of Antarctica [PDF]

, 2015
Microcystins are hepatotoxic cyclic peptides produced by several cyanobacterial genera worldwide. In 2008, our research group identified eight new glycine-containing microcystin congeners in two hydro-terrestrial mat samples from the McMurdo Dry Valleys ...
Cary, S. Craig, Hamilton, David P., Holland, Patrick T., Prinsep, Michèle R., Puddick, Jonathan, Wood, Susanna A.   +5 more
core   +3 more sources

Simultaneous Determination of Human Serum Albumin and Low-Molecular-Weight Thiols after Derivatization with Monobromobimane

Molecules, 2021
Biothiols are extremely powerful antioxidants that protect cells against the effects of oxidative stress. They are also considered relevant disease biomarkers, specifically risk factors for cardiovascular disease.
Katarzyna Kurpet, Rafał Głowacki, Grażyna Chwatko   +2 more
doaj   +1 more source