Results 71 to 80 of about 13,012 (246)

Active Sites in Sn-Beta for Glucose Isomerization to Fructose and Epimerization to Mannose [PDF]

open access: yes, 2016
Framework Lewis acidic tin sites in hydrophobic, pure-silica molecular sieves with the zeolite beta topology (Sn-Beta) have been reported previously to predominantly catalyze glucose−fructose isomerization via 1,2 intramolecular hydride shift in water ...
Marat Orazov (1783585)   +4 more
core   +1 more source

Enhanced Epimerization of Glycosylated Amino Acids During Solid-Phase Peptide Synthesis [PDF]

open access: yes, 2016
Glycopeptides are extremely useful for basic research and clinical applications, but access to structurally defined glycopeptides is limited by the difficulties in synthesizing this class of compounds.
Yalong Zhang (711724)   +6 more
core   +1 more source

Methanolysis of sphingomyelin: toward an epimerization-free methodology for the preparation of d-erythro-sphingosylphosphocholine

open access: yesJournal of Lipid Research, 2000
It is well known that acid hydrolysis of natural sphingomyelin in aqueous methanol or 1-butanol at refluxing temperature is accompanied by epimerization at the C-3 position of the long-chain base.
Robert Bittman, Christopher A. Verbicky
doaj   +1 more source

Stability of sugar solutions: a novel study of the epimerization kinetics of lactose in water [PDF]

open access: yes, 2014
This article reports on the stereochemical aspects of the chemical stability of lactose solutions stored between 25 and 60 °C. The lactose used for the preparation of the aqueous solutions was α-lactose monohydrate with an anomer purity of 96% α and 4% β
Gary P. Martin   +18 more
core   +1 more source

Energy Landscape of Alginate-Epimerase Interactions Assessed by Optical Tweezers and Atomic Force Microscopy. [PDF]

open access: yesPLoS ONE, 2015
Mannuronan C-5 epimerases are a family of enzymes that catalyze epimerization of alginates at the polymer level. This group of enzymes thus enables the tailor-making of various alginate residue sequences to attain various functional properties, e.g ...
Armend Gazmeno Håti   +4 more
doaj   +1 more source

Identification and neuroprotective properties of NA‐184, a calpain‐2 inhibitor

open access: yesPharmacology Research & Perspectives
Our laboratory has shown that calpain‐2 activation in the brain following acute injury is directly related to neuronal damage and the long‐term functional consequences of the injury, while calpain‐1 activation is generally neuroprotective and calpain‐1 ...
Michel Baudry   +14 more
doaj   +1 more source

Stereodynamic Investigation of Labile Stereogenic Centres in Dihydroartemisinin

open access: yesMolecules, 2010
Since its identification in the early 1970s, artemisinin, as well as semi-synthetic derivatives and synthetic trioxanes, have been used in malaria therapy.
Ilaria D’Acquarica   +7 more
doaj   +1 more source

Synthesis of 7β-Sulfur Analogues of Paclitaxel Utilizing a Novel Epimerization of the 7α-Thiol Group [PDF]

open access: yes, 2016
Paclitaxel analogues with a sulfur group at the 7β position were required for SAR studies. Attempts to generate these compounds by displacing a 7α leaving group with sulfur nucleophiles were unsuccessful.
Guifen Zhang (752058)   +5 more
core   +1 more source

8-epi-Salvinorin B: crystal structure and affinity at the κ opioid receptor

open access: yesBeilstein Journal of Organic Chemistry, 2007
There have been many reports of epimerization of salvinorins at C-8 under basic conditions, but little evidence has been presented to establish the structure of these compounds.
Thomas A. Munro   +7 more
doaj   +1 more source

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