Researchers have recently shown an increased interest in free radicals and their role in the tumor microenvironment. Free radicals are molecules with high instability and reactivity due to the presence of an odd number of electrons in the outermost orbit of their atoms. Free radicals include reactive oxygen and nitrogen species, which are key players in the initiation and progression of tumor c...

Additional experimental evidence is presented for in vitro generation of hydroxyl radicals because of redox cycling of environmentally persistent free radicals (EPFRs) produced after adsorption of 2-monochlorophenol at 230 °C (2-MCP-230) on copper oxide supported by silica, 5% Cu(II)O/silica (3.9% Cu). A chemical spin trapping agent, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), in conjunction with ...

Free radicals induce oxidative stress in vivo, leading to various disorders and diseases. In the present study, the effect of oxygen pressure on the cytotoxicity induced by free radicals was studied. It was found that alkyl radicals markedly aggravated Jurkat cell apoptosis under low oxygen pressure and this was ascribed to a hypoxic condition caused by the consumption of oxygen by alkyl radica...

© 2013 Kameya and Ukai, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Analysis of Relaxation Behavior of Free Radicals in Irradiated Cellulose Using Puls...

Rotational levels of molecular free radicals can be tuned to degeneracy by using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings of opposite-parity states have been proposed for use in the study of parity-violating interactions and other applications. We experimentally study a typical manifestation of this system using BaF138. Using a Stark-m...

The water-soluble polysaccharide (SCP) was isolated from Semen Coicis through hot water extraction followed by ethanol precipitation. The polysaccharide was deproteinized by using the Sevag reagent, and the polysaccharide was free of proteins as scan by UV Spectra in 260 nm and 280 nm. In order to evaluate its antioxidant activities, Free radicals scavenging activities on superoxide radicals, h...

Animal health depends on many factors and recently it has been appreciated that diet plays a pivotal role in health maintenance and prevention of various diseases. Among many dietary factors, antioxidants have a special place being major players in the battle for animal survival, maintenance of animal health, productive and reproductive performance. This is largely because of the detrimental ef...

We report bunching, slowing, and acceleration of a supersonically cooled beam of diatomic hydroxyl radicals (OH). In situ observation of laser-induced fluorescence along the beam propagation path allows for detailed characterization of longitudinal phase-space manipulation of OH molecules through the Stark effect by precisely sequenced inhomogeneous electric fields.

The treatment of paper mill effluent for COD, TOC, total phenols and color removal was investigated using combined activated sludge-ozonation processes and single processes. The combined activated sludge-O3/pH 10 treatment was able to remove around 80% of COD, TOC and color from Kraft E(1) effluent. For the total phenols, the efficiency removal was around 70%. The ozonation post treatment carri...

It is increasingly appreciated that diet plays a pivotal role in maintaining animal health, productive and reproductive performance of farm animals and poultry. Among many dietary factors natural antioxidants have special importance in the maintenance of high growth levels, reproduction and immuno-competence in poultry production. This concept is based on understanding the contribution of antio...