Results 21 to 30 of about 29,947 (258)

Free radical scavenging activity of propolis

Redox Report, 2002
We investigated the radical scavenging activity of propolis by ESR spectroscopy using spin trapping method. In addition, we examined the influence of a diet of 2% propolis on mice under oxidative stress. At low concentrations, the methanolic extract of propolis exhibited strong scavenging activity in vitro towards both the superoxide anion radical ...
Hisatsugu, Ichikawa, Kazue, Satoh, Takashi, Tobe, Ichiro, Yasuda, Fusao, Ushio, Kenichiro, Matsumoto, Kazutoyo, Endo, Chiharu, Ookubo   +7 more
openaire   +2 more sources

PHYTOCHEMICAL AND FREE RADICAL SCAVENGING ACTIVITY OF HENNA LEAVES EXTRACTS [PDF]

Journal of Agricultural Chemistry and Biotechnology, 2013
The ability of Lawsonia inermis (Henna) to prevent the initiation of free radicals that cause cellular damage was investigated in vitro. The plant leaves were extracted using methanol (ME) and diethylether (EE) and the active ingredient, Lawsone (2 ...
H. B. Hamed, A. F. Hamail, M. A. El-Hendawy, R. A. Hassan   +3 more
doaj   +1 more source

Photoinduced Electron-transfer Reaction of Pentafluoroiodobenzene with Alkenes

Molecules, 1997
Irradiation of pentafluoroiodobenzene and alkenes gave the corresponding adducts. The presence of single electron-transfer scavengers, (p-dinitrobenzene and t-Bu2NO) and the free radical inhibitor (hydroquinone) suppressed the reaction.
Qing-Yun Chen, Zheng-Yu Long, Ping Cao
doaj   +1 more source

Oxygen levels do not determine radiation survival of breast cancer stem cells. [PDF]

PLoS ONE, 2012
For more than a century oxygen has been known to be one of the most powerful radiosensitizers. However, despite decades of preclinical and clinical research aimed at overcoming tumor hypoxia, little clinical progress has been made so far.
Chann Lagadec, Carmen Dekmezian, Lucile Bauché, Frank Pajonk   +3 more
doaj   +1 more source

Synthesis and Characterization of 2(2-Tetrahydropyranylthio) methyl cyclopropylamine

Iraqi Journal of Pharmaceutical Sciences, 2017
2(2-Tetrahydropyranylthio) methyl cyclopropyl amines were synthesized from allylmercaptan through several steps. The structures of the intermediates and the final products where confirmed through IR, NMR and elemental analysis, these compounds may be of ...
Zuhair A. Muhi-Eldeen, Samira F. Hassan
doaj   +3 more sources

Facile Detection of Light-Controlled Radical Scavengers from Natural Products Using In Situ UV-LED NMR Spectroscopy

Antioxidants, 2022
With the recent development of chemical analysis technology, attention has been placed on natural light-sensitive compounds that exhibit photoreactivity to expand the structural diversity of natural product chemistry. Photochemical reactions that proceed
InWha Park, Goeun Park, Yoojin Choi, Seung-Woo Jo, Hak Cheol Kwon, Jin-Soo Park, Jin Wook Cha   +6 more
doaj   +1 more source

Comparison of Free Radical Scavenging Activity of Ocimum gratissimum and Ocimum tenuiflorum Herbal Formulation and its Mediated Nanoparticles and Nanocomposite: An In-vitro Study [PDF]

Journal of Clinical and Diagnostic Research
Introduction: Antioxidants play a crucial role in maintaining oral health by counteracting oxidative stress and Reactive Oxygen Species (ROS) to combat dental diseases. The present Investigated the antioxidant properties of an herbal formulation
Nataleya Felix, Remmiya Mary Varghese, Aravind Kumar Subramanian, Rajesh Kumar Shanmugam   +3 more
doaj   +1 more source

Dual aspect of radioenhancers and free radical scavengers

Free Radical Biology and Medicine, 2020
Combining an external beam of ionizing particles with agents to augment the dose effects of cell damages for therapeutic purpose is an important goal of radiotherapy. This last decade intensive works have focused on metal compounds or metal nanoparticles as radiosensitizers to increase the oxidative damages under irradiation.
Claude, Le Sech, Ryoichi, Hirayama
openaire   +3 more sources

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source