Two polyherbal formulations of Ayurveda viz., Chandraprabha Vati and Maha yogaraja Guggulu were evaluated for their free radical scavenging properties. Methanolic extracts of the formulations were studied in four different in vitro and ex vivo models. Total phenolic content of Chandraprabha Vati and Maha yogaraja Guggulu was found to be 5.24% and 10.74% respectively. Methanolic extracts of the ...

The hydroxyl radical scavenging capacity and efficacy of a novel organosiliceous anionic hydride compound, silica hydride, were quantified by a recently developed method. The method measures a direct relationship between the hydroxyl radical scavenging capability of the antioxidant compound and the linear decrease in signal from a fluorescent 2-hydroxyterephthalate product created by reacting a...

The polyamines, relatively low-molecular-weight aliphatic compounds, are the main inducers of eukaryotic cell growth and proliferation. Although polyamine requirements for cell growth are well defined, their role is still enigmatic. We have previously reported that amyloid beta-peptide (A beta), the main constituent of senile plaques in Alzheimer's disease (AD) brain, is toxic to neurons throug...

Damage to DNA caused by exposure of L929 fibroblasts to ozone was reflected by the generation of strand breaks, DNA inter-strand cross-links and DNA-protein cross-links. Addition of propan-2-ol, a hydroxyl radical scavenger, did not affect the formation of strand breaks. In model experiments it appeared that both purines and pyrimidines were involved in DNA inter-strand and DNA-protein cross-li...

CdWO4 nanorod photocatalysts were synthesized by a hydrothermal method. CdWO4 nanorod photocatalysts showed highly efficient photocatalytic activity for the degradation of methylene blue under ultraviolet light irradiation. On the basis of the experiment results, the difference in photocatalytic activities of the samples was mainly attributed to surface area, surface hydroxyl groups and defects...

For many years, melatonin has been known to interact with circadian rhythms. New evidence indicates that melatonin acts as a free radical scavenger and antioxidant. Moreover, melatonin prevents apoptosis in different types of cells, because it induces mRNA levels of several antioxidant enzymes. It is evident that melatonin is involved in the cellular bioenergetic system as a mechanism that coun...

Ever since their experimental discovery in 1985, fullerenes have attracted considerable attention in different fields of sciences. Investigations of chemical, physical and biological properties of fullerenes have yielded promising information. Their unique carbon cage structure coupled with immense scope for derivatization makes fullerenes a potential therapeutic agent. Henceforth various poten...

The mitochondrial respiratory activities and energy metabolism in the fetal rat brain were measured at the end of 30 minutes of intrauterine ischemia and after 2 and 4 hours of recirculation. The transient ischemia was associated with a delayed deterioration of cellular bioenergetic state and mitochondrial activities. The deterioration was not prevented by a free radical scavenger, 3-methyl-1-p...

2,6-Difluorophenylnitrene was reinvestigated both experimentally, in Ar matrices at 10 K, and computationally, by DFT and CASSCF/CASPT2 calculations. Almost-pure samples of both neutral rearrangement products (the bicyclic azirine and the cyclic ketenimine) of a phenylnitrene were prepared and characterized for the first time. These samples were then subjected to X-irradiation in the presence o...

The flower pigment of Calliandria suninamensis is used folklorically as a colorant and a dye. The crude powdered sample and methanolic extract of the plant were subjected to phytochemical, proximate analysis and antioxidant activities. Parameters like moisture content, ash values and extractive values were determined. The methanolic extract was evaluated for its antioxidant/free radical scaveng...