Results 31 to 40 of about 13,993 (189)

Scientific Opinion on Flavouring Group Evaluation 10, Revision 2 (FGE.10Rev2): Aliphatic primary and secondary saturated and unsaturated alcohols, aldehydes, acetals, carboxylic acids and esters containing an additional oxygenated functional group and lactones from chemical groups 9, 13 and 30

open access: yesEFSA Journal, 2011
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to evaluate 61 flavouring substances in the Flavouring Group Evaluation 10, Revision 2, using the Procedure in Commission ...
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

E/Z Isomerism Without a Double Bond – an Unusual Type of Stereoisomerism, and an Unprecedented Isomerisation in a Bicyclobutane [PDF]

open access: yes, 2004
An unusual kind of stereoisomerism termed E/Z isomerism without a double bond or generalised E/Z isomerism is discussed for the first time. Examples are given of pairs of synthesized and separated compounds related by this kind of isomerism (4a/5a and ...
Haftstein, Gunter, Rücker, Christoph
core  

Host–guest interactions in nor-seco-cucurbit[10]uril: novel guest-dependent molecular recognition and stereoisomerism

open access: yesBeilstein Journal of Organic Chemistry, 2019
The unique monomer and excimer fluorescence emissions of pyrene were first exploited as distinctly photophysical signals to identify the possible diastereomers of guests within nor-seco-cucurbit[10]uril (NS-CB[10]) cavities.
Xiaodong Zhang   +3 more
doaj   +1 more source

Side-by-side comparison of recombinant human glutathione peroxidases identifies overlapping substrate specificities for soluble hydroperoxides

open access: yesRedox Biology, 2023
Five out of eight human glutathione peroxidases (GPXs) are selenoproteins, representing proteins that contain selenium as part of the amino acid selenocysteine. The GPXs are important for reducing hydroperoxides in a glutathione-consuming manner and thus
Maria Schwarz   +7 more
doaj   +1 more source

Tunable Supramolecular Helical Aggregate and Optoelectrical Properties of Perylene Diimides by Stereoisomerism of Sugar

open access: yes, 2017
In the present study, two sugar-based perylenediimide derivatives (PDIs) substituted at the imide positions with carbohydrate groups were synthesized to investigate the impact of the stereoisomerism of the sugar on the aggregation morphology and ...
Zhijian Huang (1649578)   +4 more
core   +1 more source

Taming T-REX: a canonical language for geometry-aware generative design of transition-metal complexes [PDF]

open access: yesDigital Discovery
Canonical string representations have transformed organic cheminformatics, yet transition-metal complexes (TMCs) lack an equivalent that captures coordination geometry, stereochemistry, and donor topology.
Ilia Kevlishvili, Devmin Dorabawila
doaj   +1 more source

Scientific Opinion on Flavouring Group Evaluation 82, Revision 1 (FGE.82Rev1): Consideration of Epoxides evaluated by the JECFA (65th meeting) [PDF]

open access: yesEFSA Journal, 2014
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

Synthesis and structure oftrans-1,2,3- tris(3-thenoyl)cyclopropane [PDF]

open access: yes, 1994
The title cyclopropane derivative, C18H12O3S3, was synthesized and its structure investigated by single-crystal X-ray diffraction and spectroscopic methods.
Saba, Antonio
core   +1 more source

PECULIARITIES OF SEASON BIORHYTHMS IN DIFFERENT PARTS OF FUNCTIONAL SYSTEM MOTHER-PLACENTA-FETUS IN DEPENDENCE ON ITS STEREOFUNCTIONAL ORGANIZATION IN PHYSIOLOGICAL AND COMPLICATED PREGNANCY

open access: yesМедицинский вестник Юга России, 2013
Purpose: studying seasonal periodicity of stereoisomerism of uteroplacental complex, the dynamics of body weight of infants, studying the chronostructure of mezorhythms of contractive activity of right and left parts of the uterus.Material and Methods ...
N. A. Rogova   +4 more
doaj   +1 more source

Synthesis of Bridged Inside–Outside Bicyclic Ethers through Oxidative Transannular Cyclization Reactions

open access: yes, 2016
The classical geometry of the 6-endo transition state for nucleophilic additions into oxocarbenium ions can be perturbed by incorporating the reactive groups into medium-sized rings, leading to the formation of 2,6-trans-dialkyl tetrahydropyrans.
Xun Han (758877)   +1 more
core   +2 more sources

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