Results 101 to 110 of about 49,414 (256)
Química Nova, 2002 The alkene 2,4-dimethyl-8-oxabicyclo[3.2.1]-oct-6-en-3-one (3) was converted to 1,3,10-trimethyl-8-oxabicyclo[5.3.0]-dec-3-ene-2,9-dione (7) and 1,3-dimethyl-8-oxabicyclo[5.3.0]-dec-3-ene-2,9-dione (8) with a 55% overall yield in both cases. Lactones (7)
Barbosa Luiz Cláudio de Almeida +2 more
doaj
, 2016 Complementary reduction conditions have been identified that provide ready access to each respective diastereomer of bi- and tricyclic, trisustituted γ-lactones starting from the corresponding cyclic γ-keto acids.
Eric A. Bercot (1458076) +2 more
core +1 more source
Production d'arômes de type lactone par des levures [PDF]
Biotechnologie, Agronomie, Société et Environnement, 2010 Production of aroma lactones by yeasts. Lactones are widely distributed in foods and beverages as aroma compounds. Their extraction from natural products is very expensive.
Alchihab, M. +3 more
doaj
Total Asymmetric Syntheses of β-Hydroxy-δ-lactones via Umpolung with Sulfur Dioxide
Cyclic stereotriads and stereotetrads of the β-hydroxy-δ-lactone type, e.g. prelactones B and E, common in polyketides and polypropionates, are prepared via SO2-induced oxyallylations of enoxysilanes with (1E,3Z)-1-(1-phenylethoxy)penta-1,3-dien-3-yl ...
Exner, Claudia +4 more
core
Alkali‐Catalyzed Synthesis of Acylglycerol Estolides Exclusively from Castor Oil
Journal of the American Oil Chemists' Society, EarlyView.This work advances sustainable chemistry by converting renewable castor oil into high‐performance estolides via solvent‐free, low‐energy catalysis. ABSTRACT Estolides are oligomers composed of fatty acid (FA) monomers linked through secondary ester bonds located along the mid‐chain region.
Lucas Natã de Melo +3 more
wiley +1 more source
Animal Research and One Health, EarlyView.Gastrointestinal nematode infections damage the gastrointestinal epithelial tissues of ruminants, affecting nutrient utilization and overall production performance. This review outlines host‐gastrointestinal nematode interactions and discusses integrated control strategies, including nutritional supplementation, grazing management, vaccines, and ...
Wenxun Chen +5 more
wiley +1 more source
British Journal of Clinical Pharmacology, EarlyView.Aim The aim of this study was to develop a novel workflow to identify human urine biomarkers for drugs of abuse and new psychoactive substances. Metabolites of amphetamine, cocaine, LSD, MDMA, methamphetamine, THC, MDMB‐CHMICA, and MDPPP were first identified in a zebrafish embryo (ZE) metabolism study followed by comparison to most abundant human ...
Simon K. Wellenberg +7 more
wiley +1 more source
Sesquiterpene lactones from notoseris porphyrolepis
, 2000 Two new sesquiterpene lactones. notoserolides A and B. along with 12 known compounds were isolated from the aerial parts of Notoseris porphyrolepis. By means of spectral methods including MS. NMR (H-1 NMR. C-13 NMRI DEFT, HMQC. HMBC) and X-ra diffraction,
Tian, J +4 more
core
Discovery of New Lactones in Sweet Cream Butter Oil
, 2016 Sweet cream butter oil was analyzed to identify new volatile compounds that may contribute to its flavor, with an emphasis on lactones. The volatile part of butter oil was obtained by using short-path distillation.
Alain Bagnoud (2190535) +4 more
core +1 more source
Autonomous Control of Gene Expression Using Endogenous Transcription Signals
Biotechnology and Bioengineering, EarlyView.ABSTRACT Autonomous cell‐based control of heterologous gene expression can simplify batch‐culture bioprocessing by eliminating external monitoring and extrinsic control of culture conditions. Existing approaches use auto‐induction media, synthetic cell‐cell communication systems, or application‐specific biosensors.
Pakpoom Subsoontorn +2 more
wiley +1 more source