Results 61 to 70 of about 18,265 (273)
Residual Chemical Shift Anisotropies in the Structure Determination of Small Molecules
Magnetic Resonance in Chemistry, EarlyView.Plasma neutrophil elastase(ELANE) was markedly elevated in patients with alcohol use disorder, indicating a dysregulated protease‐antiprotease inflammatory balance characterised by decreased SERPINA3. ELANE showed excellent diagnostic specificity(AUC = 0.8683), supporting its potential utility as a neuroinflammatory biomarker for AUD.
Nilamoni Nath +3 more
wiley +1 more source
On the proposed structures and stereocontrolled synthesis of the cephalosporolides
Beilstein Journal of Organic Chemistry, 2012 The synthesis of four candidate stereoisomers of cephalosporolide H is described, made possible by a zinc-chelation strategy for controlling the stereochemistry of oxygenated 5,5-spiroketals.
Sami F. Tlais, Gregory B. Dudley
doaj +1 more source
Aplicação de espectrometria de massas com ionização por elétron na análise de alcaloides do mulungu
Química Nova, 2012 Erythrina verna is a medicinal plant used to calm agitation popularly known as mulungu. We purchased the barks of E. verna from a commercial producer and analyzed the alkaloid fraction of the bark by CG-MS and HRESI-MS.
Luís Guilherme Pereira Feitosa +5 more
doaj +1 more source
Cationic State Distributions over Chlorophyll Pairs in Photosystem I and II [PDF]
, 2011 Photosystem I (PSI) and II (PSII) possess chlorophyll pairs P~A~/P~B~ and P~D1~/P~D2~, respectively. These chlorophylls are the primary electron donors in the light-induced electron transfer.
Hiroshi Ishikita, Keisuke Saito
core +1 more source
Enhancing Lipidomics With High‐Resolution Ion Mobility‐Mass Spectrometry
PROTEOMICS, EarlyView.ABSTRACT Lipids, indispensable yet structurally intricate biomolecules, serve as critical regulators of cellular function and disease progression. Conventional lipidomics, constrained by limited resolution for isomeric and low‐abundance species, has been transformed by ion mobility‐mass spectrometry (IM‐MS).
Gaoyuan Lu +3 more
wiley +1 more source
New syntheses of (±)-tashiromine and (±)-epitashiromine via enaminone intermediates
Beilstein Journal of Organic Chemistry, 2016 The syntheses of the naturally occurring indolizidine alkaloid (±)-tashiromine and its unnatural epimer (±)-epitashiromine are demonstrated through the use of enaminone chemistry.
Darren L. Riley +2 more
doaj +1 more source
Molecules, 2002 Diethyl 1,2-benzoxaphosphorine-3-carboxylates 5 undergo a regio- and stereoselective [2+2] photodimerization reaction in methanol solution under the action of sunlight, giving in all cases the corresponding anti head-to-tail dimers 6 and 7.
Anka Bojilova +3 more
doaj +1 more source
Ring closure reactions of bicyclic prolinol and prolin ester enantiomers [PDF]
, 2009 Starting from the of bicyclic proline ester, ethyl exo-2-azabicyclo[2.2.1]heptane-3-carboxylate (+)-5 several hydantoines and thiohydantoines were prepared by acidic ring closure of the corresponding urea or thiourea derivatives. Enantiomer (-)-5 was
Fülöp, Ferenc +5 more
core +1 more source
Diatoms synthesize sterols by inclusion of animal and fungal genes in the plant pathway [PDF]
, 2020 Diatoms are ubiquitous microalgae that have developed remarkable metabolic plasticity and gene diversification. Here we report the first elucidation of the complete biosynthesis of sterols in the lineage.
, Angela +7 more
core +1 more source
, 2014 Citation: 'epimers' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.E02167 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage
openaire +1 more source