Results 11 to 20 of about 152 (136)

Metal‐Ion Regulated Light‐Free Z→E Isomerization of Azobenzene Glycomacrocycle

open access: yesChemistry – A European Journal, EarlyView.
Metal ion‐catalyzed Z→E isomerization of photoswitchable azobenzene glycomacrocycle: A new azobenzene‐based glycomacrocycle is capable of forming a 1:1 complex with divalent metal ions in both E‐ and Z‐isomers. The complexes undergo light‐free Z→E isomerization in a timescale spanning from seconds to weeks.
Yang Zhou   +4 more
wiley   +1 more source

An Investigation Into the Yields of 3,4‐Methylenedioxyphenyl‐2‐propanone (MDP2P) From Glycidate Pre‐Precursors

open access: yesDrug Testing and Analysis, EarlyView.
Hydrolysis of the glycidate pre‐precursors MMDMG and EMDMG was evaluated for MDP2P production. Acid hydrolysis of MMDMG (HCl, 100°C, 18 h) yielded the highest MDP2P recovery (79%), whereas base hydrolysis produced only slightly lower yields (73%), demonstrating both pathways are effective routes to this key MDMA precursor.
Alexandra L. Mercieca   +4 more
wiley   +1 more source

Soil Silicon Application Alleviates Drought Stress in Sugar Beet (Beta vulgaris L.)

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background: The increasing frequency and intensity of drought events have led to yield and quality losses in sugar beet production in temperate regions in Central Europe. Under arid conditions, silicon (Si) application reduced beet yield losses under drought. Similar data for temperate climates are missing.
Tabea Selzer   +5 more
wiley   +1 more source

High‐purity X‐ray polarimetry at high energies for Mössbauer spectroscopy

open access: yesJournal of Synchrotron Radiation, EarlyView.
This work extends high‐purity X‐ray polarimetry into the 15–30 keV range, enabling polarization‐filtered synchrotron Mössbauer spectroscopy of higher‐energy nuclear resonances. A proof‐of‐principle experiment at 22.494 keV demonstrates a polarization purity of (1.2 ± 0.5) × 10−8, establishing the feasibility of the approach.High‐purity X‐ray ...
Berit Marx-Glowna   +9 more
wiley   +1 more source

Antiglycation and Amyloid‐β Inhibitory Activities of Pandanus odorifer Extracts and Isolated Constituents: In Vitro and Molecular Docking Insights

open access: yesChemistry &Biodiversity, Volume 23, Issue 9, September 2026.
Pandanus odorifer methanolic extract exhibited strong antiglycation activity, moderate antioxidant capacity, and high flavonoid content. Three isolated compounds reduced Aβ‐associated ThT fluorescence, with blumenol C glucoside showing the greatest effect.
Patricia Marie P. Oliva   +4 more
wiley   +1 more source

Chemical Constituents of the Deep‐Sea‐Derived Fungus Talaromyces wortmannii and Their Ferroptosis Inhibitory Activity

open access: yesChemistry &Biodiversity, Volume 23, Issue 9, September 2026.
One new tyramine derivative (1) and 28 known compounds (2–29) were isolated from deep‐sea‐derived fungus Talaromyces wortmannii. Their structures were elucidated by NMR/MS and computational calculations. Compounds 2 and 6 potently inhibited ferroptosis with EC5₀ values of 4.52 and 13.73 µM.
Ke‐Xin Ma   +5 more
wiley   +1 more source

Stereodivergent Synthesis of C5‐α‐Substituted Linezolid Derivatives From D‐Mannitol and Structure–Antibacterial Activity Evaluation

open access: yesChirality, Volume 38, Issue 9, September 2026.
A stereodivergent route from D‐mannitol enables access to enantiopure C5‐α‐substituted linezolid analogues with full configurational control. Biological evaluation reveals that α‐substitution abolishes antibacterial activity irrespective of stereochemistry, establishing a strict steric limitation at C5 and highlighting the dominant role of substituent ...
José A. Gálvez   +3 more
wiley   +1 more source

Chiral HPLC Separation of Phosphonothrixin and Phosphonate Derivatives and Electronic Circular Dichroism Characterization of the Isolated Enantiomers

open access: yesELECTROPHORESIS, Volume 47, Issue 9, Page 853-865, September 2026.
Natural compound phosphonothrixin's herbicidal activity resides exclusively in its (S)‐enantiomer, yet existing enantioselective syntheses are cumbersome, and direct chiral LC separation is hampered by the compound's high polarity, lack of aromatic groups, and metal chelation–induced peak tailing.
Mirna Maalouf   +8 more
wiley   +1 more source

Liquid crystals for space instrumentation: optical properties of liquid crystal mixtures for polarimeters

open access: yesOptical Materials Express, 2019
Liquid crystal (LC) based polarization modulators will be used for the first time in space instrumentation in the ESA/NASA Solar Orbiter mission. LC birefringence dependence on temperature and wavelength is key for the design of these instruments. A complete characterization of the optical properties of five different LC mixtures (ZLI-3700-000, BL006 ...
Pilar García Parejo   +1 more
openaire   +1 more source

Optical Durability of Contemporary PV Encapsulants Through Artificial UV Weathering

open access: yesProgress in Photovoltaics: Research and Applications, Volume 34, Issue 9, Page 1189-1199, September 2026.
Encapsulant choice can be used to mitigate UV‐induced degradation in modern silicon photovoltaic modules, but this strategy is only effective if encapsulants are durable under UV weathering. This study identifies optical changes to 14 commercial encapsulants as a function of UV weathering and identifies that, while changes to material transmittance ...
Dennice M. Roberts   +9 more
wiley   +1 more source

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