Results 91 to 100 of about 21,587 (210)

Misleading measures in Vitamin D analysis: a novel LC-MS/MS assay to account for epimers and isobars [PDF]

open access: yes, 2011
Background Recently, the accuracies of many commercially available immunoassays for Vitamin D have been questioned. Liquid chromatography tandem mass spectrometry (LC- MS/MS) has been shown to facilitate accurate separation and quantification of the ...
Barker, James   +4 more
core   +2 more sources

Easier, Safer, and Greener: Unlocking the Power of Solid Reagents in Organic Reactions by Mechanochemistry

open access: yesChemistryEurope, Volume 4, Issue 2, February 2026.
This review highlights the powerful synergy between mechanochemistry and solid reagents to replace hazardous substances traditionally used in organic synthesis. Such an approach offers a safer and more sustainable pathway for conducting organic reactions, with potential benefits in both reactivity and selectivity. The use of solid bases, acids, and gas
Adrien Gallego   +4 more
wiley   +1 more source

Beyond Ribosomal Binding: The Increased Polarity and Aberrant Molecular Interactions of 3-epi-deoxynivalenol

open access: yesToxins, 2016
Deoxynivalenol (DON) is a secondary fungal metabolite and contaminant mycotoxin that is widely detected in wheat and corn products cultivated around the world.
Yousef I. Hassan   +3 more
doaj   +1 more source

Late Stage Mannan Metabolism in Cellvibrio japonicus Requires the Combined Action of a Mannosyl‐Glucose Phosphorylase and a Mannobiose Epimerase

open access: yesMolecular Microbiology, Volume 125, Issue 2, Page 173-184, February 2026.
Model for the non‐PTS utilization of manno‐oligosaccharides by Cellvibrio japonicus. The Mgp130A and EpiA enzymes are essential for the utilization of mannose residues. ABSTRACT Manno‐oligosaccharides and their metabolism play important roles in gut health, pharmaceutical development, and renewable chemical production.
Jessica K. Novak, Jeffrey G. Gardner
wiley   +1 more source

Chemical synthesis of rare carbohydrates

open access: yesGreen Chemistry Letters and Reviews
Rare carbohydrates (e.g. D-tagatose, D-allulose, and D-xylulose) are regarded as ideal sugar replacers in a number of food formulations due to their relative sweetness and caloric value.
Sergio I. Martínez-Monteagudo
doaj   +1 more source

Intra‐ and Intermolecular Glycosylation of d‐Idopyranosyl and 6‐Deoxy‐d‐ido‐heptopyranosyl Donors: Toward the Repeating Unit of Campylobacter jejuni HS:4c Capsular Polysaccharide

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 4, January 26, 2026.
A comprehensive glycosylation study of diversely protected and activated d‐idopyranosyl and 6‐deoxy‐d‐ido‐heptopyranosyl donors using intra‐ and intermolecular coupling strategies is reported. Intramolecular aglycon delivery afforded 1,2‐cis‐β‐idopyranosides, while intermolecular glycosylation yielded chromatographically separable α‐ and β‐linked ...
Maude Cloutier   +3 more
wiley   +1 more source

Determinants of Glycosaminoglycan (GAG) Structure

open access: yesBiomolecules, 2015
Proteoglycans (PGs) are glycosylated proteins of biological importance at cell surfaces, in the extracellular matrix, and in the circulation. PGs are produced and modified by glycosaminoglycan (GAG) chains in the secretory pathway of animal cells.
Kristian Prydz
doaj   +1 more source

Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates [PDF]

open access: yes, 2003
This paper presents new results from Optically Stimulated Luminescence (OSL) dating on a sediment core raised from the crest of the Lomonosov Ridge in the central Arctic Ocean.
Backman, Jan   +3 more
core   +3 more sources

EPR, ENDOR, and TRIPLE resonance studies of modified bacteriochlorophyll cation radicals [PDF]

open access: yes, 1994
A series of substituted bacteriochlorophyll molecules, all used in reconstitution experiments of reaction centers of Rhodobacter sphaeroides (Struck et al. Biochim. Biophys.
Käß, H.   +5 more
core  

Regio- and Stereoselective Ruthenium Catalyzed Hydrovinylation of 1,3-Dienes: Application to the Generation of a 20S-Steroidal Sidechain [PDF]

open access: yes, 2003
The addition of ethylene to 1,3-dienes and 1-vinylcycloalkenes, catalyzed by two ruthenium complexes, proceeds in a regioselective fashion to afford 3-methyl-1,4-dienes as products. For a steroidal-based 1-vinylcycloalkene, the addition is stereospecific,
Donaldson, William A.   +2 more
core   +3 more sources

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