Abnormal metabolites of isoleucine in a patient with propionyl-CoA carboxylase deficiency
作者:Lawrence Sweetman、Walter Weyler、William L. Nyhan、Carlos de Céspedes、Alba Rosa Loria、Yadira Estrada
DOI:10.1002/bms.1200050307
日期:1978.3
unrecognized abnormalmetabolites have been identified and quantitated in the urine of a patient with an inherited deficiency of propionyl-CoAcarboxylase. These included the isoleucinemetabolites 2-methyl-3-hydroxybutyric acid and 2-methylacetoacetic acid. These isomers 3-hydroxyvaleric acid and 3-oxovaleric acid were found, which may be products of the condensation of propionyl-CoA with acetyl-CoA
Partition coefficients of ketones, phenols, aliphatic and aromatic acids, and esters in n-hexane/nitromethane
作者:Urszula Kotowska、Valery Isidorov
DOI:10.2478/s11532-011-0060-4
日期:2011.10.1
in sample preparation and in countercurrent and liquid-liquid chromatographic separations. Partition coefficients are widely used in toxicology, environmental, and analytical chemistry. The K hn determination procedure for the n -hexane/nitromethane system was optimized and partition coefficients for 99 ketones, esters and trimethylsilyl derivatives of phenols, aliphatic and aromaticacids were determined
液-液分配用于样品制备以及逆流和液-液色谱分离。分配系数被广泛用于毒理学,环境和分析化学中。该 ķ HN 用于确定过程 Ñ 正己烷/硝基甲烷体系进行了优化和分配系数为99酮,酯和酚的三甲基甲硅烷衍生物,测定脂族和芳族酸。对于130种化合物, 使用 K hn 与其他理化和结构参数之间的数学关系来预测 K hn 值 。
Synthesis and mass spectra of some 3-acylamino-2-piperidones
作者:D. R. Clarke、E. S. Waight
DOI:10.1039/j39710003743
日期:——
A number of 3-acylamino-2-piperidones having hydroxy-, oxo-, or vinyl groups in the acyl residue have been synthesized. The mechanism of formation by electron impact of the principal fragment ions of 3-(3-hydroxybutyrylamino)-2-piperidone has been investigated by examination of deuteriated analogues.
Photolysis and photocatalysis of ibuprofen in aqueous medium: characterization of by-products via liquid chromatography coupled to high-resolution mass spectrometry and assessment of their toxicities against<i>Artemia Salina</i>
作者:Júlio César Cardoso da Silva、Janaina Aparecida Reis Teodoro、Robson José de Cássia Franco Afonso、Sérgio Francisco Aquino、Rodinei Augusti
3-Alkoxy-4-substituted-phenoxy-2,3-unsaturated acid esters and
申请人:Zoecon Corporation
公开号:US04561882A1
公开(公告)日:1985-12-31
This invention relates to 3-alkoxy-4-substituted-phenoxy-2,3-unsaturated acid esters, derivatives thereof, and the use of said acid esters and derivatives for the control of weeds.