Results 71 to 80 of about 4,146,519 (301)

Free Radical Scavenging Properties of Sulfinpyrazone

open access: yes, 2009
Sulfinpyrazone, a potent uricosuric drug, was tested in vitro for its scavenging action against oxygen free radicals . In this study, sulfinpyrazone was able to scavenge 1,1- diphenyl-2-picrylhydrazyl radical with IC50 value of 29.82 mug/ml compared to ...
黃天祥, HUANG, TIEN-SHANG
core  

Implantable Ionic Memristors Based on Natural Polymer Heterojunctions

open access: yesAdvanced Functional Materials, EarlyView.
We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee   +6 more
wiley   +1 more source

Singlet oxygen quenching and radical scavenging capacities of structurally-related flavonoids present in Zuccagnia punctata Cav.

open access: yes, 2015
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)The singlet oxygen ((1)O(2)) quenching and free radical (DPPH(center dot), ABTS(center dot+) and O(2)(center dot-)) scavenging ability of three structurally-related flavonoids (7 ...
Ordonez, RM   +8 more
core   +1 more source

Balancing Hydrophobicity and Hydrophilicity: Dual Filler‐Engineered Proton Exchange Membranes for Durable, High‐Power Fuel Cells

open access: yesAdvanced Functional Materials, EarlyView.
Polarity‐matched Zr–MOFs program Nafion's nanoscale morphology during solution casting. Hydrophilic UiO‐66 preserves hydrated pathways, while hydrophobic UiO‐67 increases the proton hopping sites by densifying ionic clusters. Combining both fillers yields a membrane that delivers 176 mS cm−1 conductivity, reaches 1.46 W cm−2 under 200 kPa, and triples ...
Yonghwi Cho   +13 more
wiley   +1 more source

Antioxidant activity of extract from Polygonum aviculare L.

open access: yesBiological Research, 2006
Free radicals induce numerous diseases by lipid peroxidation, protein peroxidation, and DNA damage. It has been reported that numerous plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum aviculare L. (Polygonaceae) has
CHIN-YUAN HSU
doaj  

Bergenin Content and Free Radical Scavenging Activity of Extracts

open access: yesNatural Product Communications, 2015
Our research was focused on the evaluation of bergenin content and free radical scavenging activity of extracts prepared from three different species of Bergenia - B. crassifolia (L.) Fritsch., B. ciliata (Haw.) Sternb. and B. x ornata Stein.
Helena Hendrychová   +3 more
doaj   +1 more source

A methylflavan with free radical scavenging properties from Pancratium littorale

open access: yes, 2001
The isolation of 7,4'-dihydroxy-8-methylflavan (1) from the dichloromethane extract of Pancratium littorale stem was guided by an assay for free radical scavenging activity towards the 2,2-diphenyl-1-picryI-hydrazyl radical (DPPH). The structure of 1 was
Andrew Marston   +7 more
core   +1 more source

Photo‐Degradable Polyester Networks and Multi‐Photon Printed Objects Based on Cyclic Ketene Acetals

open access: yesAdvanced Functional Materials, EarlyView.
The current work introduces a photoreversible polyester network derived from radical ring‐opening polymerization of cyclic ketene acetals. It combines photoreversible cross‐linking with initiator‐free multi‐photon printing. Reversible network formation, tunable mechanical properties, and selective degradation highlight its potential as a versatile ...
Till Meissner   +5 more
wiley   +1 more source

Antioxidant activity of extract from Polygonum cuspidatum

open access: yesBiological Research, 2007
Numerous diseases are induced by free radicals via lipid peroxidation, protein peroxidation and DNA damage. It has been known that a variety of plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum cuspidatum Sieb.
CHIN-YUAN HSU, YU-PEI CHAN, JELI CHANG
doaj  

A Magneto‐Mechanically Activated Nerve Guidance Conduit Promotes Peripheral Nerve Regeneration via TIMP1‐Mediated Membrane Tension Transfer

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a magneto‐mechanical strategy that incorporates FP@MSCs into an aligned PCL/GelMA nerve guidance conduit. Magnetic stimulation increases membrane tension in FP@MSCs, triggering cytoskeletal remodeling, Schwann cell‐like differentiation, and TIMP1 secretion. TIMP1 activates ITGB1/CD63–FAK signaling in NE‐4C cells, increasing membrane
Xinyu Zhu   +14 more
wiley   +1 more source

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