Results 111 to 120 of about 12,662 (287)

On the enigmatic scent glands of dyspnoan harvestmen (Arachnida, Opiliones): first evidence for the production of volatile secretions [PDF]

open access: yes, 2014
La utilización en encuestas de preguntas con tarjetas de respuesta está totalmente aceptada por la comunidad investigadora. Esto supone una carga de trabajo “extra” en la tarea del entrevistador, lo que explica que en ocasiones no se utilicen ...
Günther Raspotnig   +4 more
core   +4 more sources

Lipid‐Based Nanoparticles for Time‐Release Delivery of Flavonoids

open access: yesJournal of Food Process Engineering, Volume 49, Issue 5, May 2026.
Lipid‐based nanocarriers enhance the stability, bioavailability, and controlled release of flavonoids. These systems improve encapsulation efficiency and protection against degradation, highlighting their potential for food and nutraceutical applications.
Ziane da Conceição das Mercês   +3 more
wiley   +1 more source

Magnetic Zinc hydrogen salt of phosphotungstic acid: an efficient catalyst for the one-pot synthesis of 4-H pyrans derivatives [PDF]

open access: yesشیمی کاربردی روز
In this study, a magnetic catalyst of phosphutangetic acid salt (ZnHPMo12O40) was prepared by substitution of protons in H3PW12O40 with zinc metal cations as a recyclable catalyst.
Mahdieh Sajadi   +2 more
doaj   +1 more source

A Three‐Step Route to Functionalized Pyrrole‐2,5‐Dicarboxylic Acids from Galactaric Acid

open access: yesChemSusChem, Volume 19, Issue 8, 28 April 2026.
Galactaric acid (GalA) has been used as substrate for a library of N‐substituted pyrrole‐2,5‐dicarboxylic acids (PDCAs). Existing routes to N‐substituted PDCAs require many steps or lack product isolation. We present a simple, scalable three‐step synthesis from GalA via a 2‐pyrone salt, giving isolated PDCA derivatives in high yield without ...
Giacomo Trapasso   +3 more
wiley   +1 more source

Contribution of NMR spectroscopy to the mechanistic understanding of photochromism

open access: yesInternational Journal of Photoenergy, 2004
Along with classical UV-Visible spectroscopy allowing for the determination of intrinsic properties (λmax,ε), multinuclear NMR spectroscopy is a promising and useful tool for studying photochromic reactions.
S. Delbaere   +3 more
doaj   +1 more source

Synthesis of Sulfur Heterocycles by Palladium‐Catalyzed Cyclization

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 14, 15 April 2026.
In spite of the well‐known palladium thiophilicity, sulfur‐containing acyclic substrates may efficiently undergo several different kinds of palladium‐catalyzed cyclization processes leading to highly important sulfur heterocycles in one synthetic step. Advances in this challenging and stimulating field of research are presented in this review.
Bartolo Gabriele
wiley   +1 more source

β‐Mannosyl Triazoles as Mimics of Galactosyl Galectin‐3 and Galectin‐9 N‐Terminal Domain Inhibitors

open access: yesChemBioChem, Volume 27, Issue 7, 14 April 2026.
Galacto‐mimicking mannosyl monotriazoles, but not bis‐triazoles, inhibit galectin‐3 and galectin‐9 N‐terminal domain. Mannosyl β‐C‐1 amidotriazoles have previously been reported to have higher selectivity for galectin‐9N (N‐terminal domain) than the corresponding galactoside C3 amidotriazoles have, which were more selective for galectin‐3.
Fredrik Sjövall, Ulf J. Nilsson
wiley   +1 more source

Selective Oxygenation of 3,4‐Dihydro‐2H‐Pyran to 5,6‐Dihydro‐2H‐Pyran‐2‐One With Pd/C Catalyst and Molecular Oxygen

open access: yesChemSusChem, Volume 19, Issue 7, 14 April 2026.
Selective oxygenation: The oxidation of 3,4‐dihydro‐2H‐pyran, which can be produced from lignocellulose‐derived furfural, was investigated with various catalysts using O2 as an oxidant in a H2O solvent. 5,6‐dihydro‐2H‐pyran‐2‐one, a value‐added product, was obtained in 52% yield with reusable Pd/C catalyst.
Naoki Kawabata   +3 more
wiley   +1 more source

Bioassay-Guided Isolation of 2-[P-(2-Carboxyhydrazino)Phenoxy]-6-(Hydroxymethyl)Tetrahydro-2h-Pyran-3,4,5-Triol From Oroxylum Indicum and Investigation of Its Molecular Mechanism Action of Apoptosis Induction

open access: green, 2021
Asem Robinson Singh   +6 more
openalex   +2 more sources

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