Results 91 to 100 of about 44,745 (234)

Stilbenes: chemistry and pharmacological properties

open access: yesJournal of Applied Pharmaceutical Research, 2015
Medicinal plants are the most important source of life saving drugs for the majority of the Worlds’ population. The compounds which synthesized in the plant from the secondary metabolisms are called secondary metabolites; exhibit a wide array of ...
Chetana Roat, Meenu Saraf
doaj  

Oxyresveratrol: Structural Modification and Evaluation of Biological Activities

open access: yesMolecules, 2016
Oxyresveratrol (2,4,3′,5′-tetrahydroxystilbene, 1), a phytoalexin present in large amounts in the heartwood of Artocarpus lacucha Buch.-Ham., has been reported to possess a wide variety of biological activities.
Nutputsorn Chatsumpun   +7 more
doaj   +1 more source

The Nature of the Chemical Bond. VII. The Calculation of Resonance Energy in Conjugated Systems [PDF]

open access: yes, 1933
The quantum‐mechanical treatment previously applied to benzene, naphthalene, and the hydrocarbon free radicals is used in the calculation of extra resonance energy of conjugation in systems of double bonds, the dihydronaphthalenes and dihydroanthracenes,
Pauling, Linus, Sherman, J.
core   +1 more source

Regulation of mRNA translation by a photoriboswitch

open access: yeseLife, 2020
Optogenetic tools have revolutionized the study of receptor-mediated processes, but such tools are lacking for RNA-controlled systems. In particular, light-activated regulatory RNAs are needed for spatiotemporal control of gene expression.
Kelly A Rotstan   +7 more
doaj   +1 more source

Quantum Interference in Off-Resonant Transport through Single Molecules

open access: yes, 2014
We provide a simple set of rules for predicting interference effects in off-resonant transport through single-molecule junctions. These effects fall in two classes, showing respectively an odd or an even number of nodes in the linear conductance within a
Hedegård, Per   +5 more
core   +1 more source

Double Time Window Targeting Technique: Real time DMRG dynamics in the PPP model [PDF]

open access: yes, 2010
We present a generalized adaptive time-dependent density matrix renormalization group (DMRG) scheme, called the {\it double time window targeting} (DTWT) technique, which gives accurate results with nominal computational resources, within reasonable ...
C. Lanczos   +11 more
core   +2 more sources

Salt‐induced nutritional and metabolic shifts in halophytes: implications for food security

open access: yesJournal of the Science of Food and Agriculture, EarlyView.
Abstract Plant species vary in their response to salinity: some crops show a degree of salt tolerance, while halophytes – whether wild or cultivated – are characterized by a high capacity to thrive under saline conditions. Halophytes are considered a source of valuable secondary metabolites with potential economic value, yet they might also produce ...
Giulia Atzori   +9 more
wiley   +1 more source

Polyphenolic Activation of Basophils Explains Alcohol Hypersensitivity in AERD

open access: yesThe Laryngoscope, EarlyView.
The mechanism behind alcohol sensitivity in AERD has not been previously characterized. This study demonstrates the activation of basophils in patients with CRSwNP and AERD by polyphenolic compounds, but not ethanol. Since these compounds can be found in alcoholic beverages in similar frequencies by which they trigger symptoms, this research provides a
Spencer C. Payne   +3 more
wiley   +1 more source

Poly(2‐Oxazoline)‐Based Polyphotoacids: Synthesis, Solution Behavior, and Cellular Uptake of Multi‐Responsive Intracellular Transporters

open access: yesMacromolecular Rapid Communications, EarlyView.
The ability of photoacids to increase their acidity in response to light irradiation (excited state proton transfer, ESPT) makes them attractive building blocks for the design of stimuli‐responsive copolymers. In this contribution, we present highly biocompatible polyphotoacids based on poly(2‐oxazoline)s bearing 1‐hydroxypyrene units. Low cytotoxicity,
Leonid I. Kaberov   +7 more
wiley   +1 more source

Stilbenes and a New Acetophenone Derivative from Scirpus holoschoenus

open access: yesMolecules, 2001
Separation of the extract of the tubers of Scirpus holoschoenus L. (family Cyperaceae), a species easily confused with Juncus plants, afforded 2-prenyl-3,5,4'-trimethoxystilbene, 2-prenyl-3-hydroxy-5,4'-dimethoxystilbene, 2-prenyl-3,4'-dihydroxy-5 ...
T. R. Sobahi   +2 more
doaj   +1 more source

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