Results 51 to 60 of about 57,523 (263)

Establishment of the Antioxidant/Antiradical Activity of the Inhibitors Using the DPPH–Radical

Chemistry Journal of Moldova, 2008
This research paper presents the results of the investigation of antioxidant activities of various inhibitors, which are constituents of winery products: quercitin, rezveratrol, dihydroxyfumaric acid. Also, the antioxidant activity of tartaric and dihydroxyfumaric (DFH4) acids derivatives has been determined: sodium dihydroxyfumarate, dimethylic ester ...
Maria Gonta, Gheorghe Duca, Diana Porubin   +2 more
openaire   +2 more sources

Preparation of Pyrazoles Using Hydrazyl Radicals Initiated by DPPH [PDF]

Bulletin of the Chemical Society of Japan, 1991
Abstract Hydrazyl radicals, initiated by DPPH, reacted with α,β-unsaturated ketones without any good leaving group on their β-positions to yield pyrazoles regio-selectively.
Nobutoshi Yoshihara, Tadashi Hasegawa, Sadao Hasegawa   +2 more
openaire   +1 more source

Biomimetic Hydrogel System Targeting S100A8 Centered Neuroimmune Crosstalk and Hypoxia Induced Neuronal Injury

Advanced Science, EarlyView.
A biomimetic hydrogel (HPC@Gel) was developed for traumatic brain injury repair by combining oxygen‐carrying hemoglobin nanoparticles and anti‐inflammatory carbon quantum dots within a brain‐like matrix. The system alleviated hypoxia, reduced harmful neuroimmune signaling, protected neurons, supported neural regeneration, and improved neurological and ...
Peng Liu, Xiaoyang Wu, Xiaoyin Liu, Yuyan Wang, Shichao Jiang, Kai Wu, Gaowei Li, Jie Ding, Chengheng Wu, Dan Wei, Jing Sun, Hongsong Fan, Liangxue Zhou   +12 more
wiley   +1 more source

Multi‐Component Functionalized Bifidobacterium Longum Hydrogel for Multi‐Target Integrated Therapy of Colitis‐Associated Anxiety and Depression

Advanced Science, EarlyView.
A pH/MMP dual‐responsive Bifidobacterium longum (BL) hydrogel (INPs@BL@Gel) functionalized with baicalin, tyrosine, and inulin is constructed. It enables gastric protection, inflammation‐targeted release, and prolonged intestinal colonization. By remodeling gut microbiota, elevating beneficial neuroactive metabolites (homovanillic acid, short‐chain ...
Shuo Zhang, Yujie Zhang, Jiansheng He, Shunlian Li, Qingyan Ma, Qiao Li, Yudan Zhang, Yiyang Wang, Shaobo Ma, Songyan Jin, Chune Li, Xueyong Xie, Hang Zhang, Junze Deng, Xueqin Song, Daocheng Wu, Xiancang Ma, Feng Zhu   +17 more
wiley   +1 more source

Oxo-Hydrazyl as a Substitute for the Stable Free Radicals Employed in Measuring Total Antioxidant Activity

Antioxidants
Numerous standardized methods for evaluating antioxidant capacity are available, some of the most used methods in this regard employ stable free radicals, like 2,2-diphenyl-1-picrilhydrazyl free radical (DPPH·) or 2,2′-azino-bis(3-ethylbenzothiazoline-6 ...
Petre Ionita
doaj   +1 more source

DPPH Radical Scavenging and Xanthine Oxidase Inhibitory Activity of Leaves

Natural Product Communications, 2011
From a methanol extract of the leaves of the Malian medicinal tree Terminalia macroptera, cis -polyisoprene ( 1 ), chebulic acid trimethyl ester ( 2 ), methyl gallate ( 3 ), shikimic acid ( 4 ), corilagin ( 5 ), rutin ( 6 ), narcissin ( 7 ), chebulagic ...
Anh Thu Pham, Karl Egil Malterud, Berit Smestad Paulsen, Drissa Diallo, Helle Wangensteen   +4 more
doaj   +1 more source

Nano‐Backpack Engineered Probiotics with Reactive Oxygen Species–Responsive Tungsten Release for Synergistic Therapy of Inflammatory Bowel Disease

Advanced Science, EarlyView.
An integrated probiotic system is engineered to execute a programmed therapeutic cascade against inflammatory bowel disease. Upon pathological signals, the system sequentially performs ROS scavenging, tungsten release, and selective pathogen suppression, thereby breaking the oxidative stress–dysbiosis cycle to remodel gut microbiota and reinforce ...
Yang Yang, Liucan Wang, Guoqing Chen, Yuanling Zhang, Jiarui Shi, Wenzhe Fan, Min Yu, Jixi Zhang, Hua Yang   +8 more
wiley   +1 more source

Antioxidant Activity of Moringa oleifera Extracts

Indonesian Journal of Chemistry, 2016
Moringa oleifera have been evaluated for its antioxidant activity. M. oleifera leaves were extracted with methanol, ethyl acetate, dichloromethane and n-hexane.
Wiwit Denny Fitriana, Taslim Ersam, Kuniyoshi Shimizu, Sri Fatmawati   +3 more
doaj   +1 more source

A Pathology‐Instructed Theranostic Platform with Mechanoadaptive and ROS‐Powered Nanobreathing Functions for Precision Myocardial Repair

Advanced Science, EarlyView.
We developed a pH responsive theranostic serum albumin hydrogel named BST, functionalized with MRI and CT probes and loaded with mitochondria targeted CAT‐SOD nanogels, that rapidly self repairs and mechanically stabilizes the infarcted myocardium, releases therapeutic nanogels and albumin under hypoxia induced acidosis to clear mitochondrial ROS ...
Zheng Luo, Cui Yang, Liuzhou Mao, Panqin Ma, Chiyu Jia, Karen Yuanting Tang, Xian Jun Loh, Yun‐Long Wu   +7 more
wiley   +1 more source

Study on extraction technology and antioxidative activity of polysaccharides produced by Lachnum hyalopus

浙江大学学报. 农业与生命科学版, 2009
Extraction of polysaccharide from Lachnum hyalopus with microwave and its scavenging capacity of superoxide anion radical and 1, 1-diphenyl-2-picrylhydrazyl (DPPH) free radical were studied. The results indicate that the optimum conditions for extraction
YE Ming, LI Shi-yan, YANG Liu, ZHU Li, LIN Ying-ren   +4 more
doaj   +1 more source