نتایج جستجو برای: peroxide index

تعداد نتایج: 428040  

Background and Objectives: Osteoporosis is one of the bone diseases that various factors such as oxidative stress have a role in creating it. The current research aimed to examine the synchronous effect of aerobic physical exercise and Vitamin D supplementation on osteocalcine and alkaline phosphatase in rats poisoned by H2O2.  Materials & Methods: Sixty adult male Wistar rats were randomly di...

Journal: :acta medica iranica 0
z. hussain-khan1 a. a. soleimani m. farzan

hydrogen peroxide, an oxidizing agent used in surgery for its antiseptic properties, has been associated with life-threatening complications. we report a case of suspected gas embolism following irrigation of a tibial bone cyst with hydrogen peroxide in a five year-old boy under general anesthesia, who died despite resuscitative measures and a long stay in the intensive care unit.

2002
DALE A. WEBSTER

The formation of hydrogen peroxide during the oxidation of NADH by purified preparations of cytochrome o has been demonstrated by employing three independent methods: polarographic, calorimetric, and fluorometric. The first two methods were used to assay for the accumulation of hydrogen peroxide and showed that hydrogen peroxide did accumulate as a product, but only about 30% of the oxygen cons...

Journal: :جنگل و فرآورده های چوب 0
حمیدرضا مهری ایرائی کارشناس ارشد صنایع خمیر و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران علی قاسمیان دانشیار گروه صنایع خمیر و کاغذ، دانشکدۀ مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران حسین رسالتی استاد گروه صنایع چوب و کاغذ، دانشکدۀ مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران احمدرضا سرائیان دانشیار گروه صنایع خمیر و کاغذ، دانشکدۀ مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران ایمان اکبرپور دانشجوی دکتری صنایع خمیر و کاغذ، دانشکدۀ مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

in the present research, the effect of different peroxide charges and reaction times were investigated inhydrogen peroxide bleaching of mixed old newsprint and old magazine deinked pulp. in thebeginning, mixed recycled papers were pulped using conventional method and then deinked byflotation. in addition, deinked pulps (mixture ratio of 70% onp and 30% omg) were bleached withhydrogen peroxide a...

Journal: :Infection and immunity 1984
J Carlsson M B Edlund L Hänström

Lactoperoxidase catalyzes the oxidation of thiocyanate by hydrogen peroxide into hypothiocyanite, a reaction which can protect bacterial and mammalian cells from killing by hydrogen peroxide. The present study demonstrates, however, that lactoperoxidase in the presence of thiocyanate can actually potentiate the bactericidal and cytotoxic effects of hydrogen peroxide under specific conditions, s...

2005
Xiaoyan Zhang Rakesh K. Sharma Ashok Agarwal Tommaso Falcone

Purpose : To 1) evaluate the embryotoxic effects of hydrogen peroxide on mouse embryo development and 2) examine if pentoxifylline can reverse hydrogen peroxide induced embryotoxicity. Methods : Prospective in vitro study examining the effects of varying concentrations of hydrogen peroxide and pentoxifylline on the blastocyst development rate alone as well as in combination. Results : A dose-de...

Journal: :Analytical and bioanalytical chemistry 2005
Ned A Stephenson Alexis T Bell

A technique utilizing 1H NMR spectroscopy has been developed to measure the concentration of hydrogen peroxide from 10(-3) to 10 M. Hydrogen peroxide produces a peak at around 10-11 ppm, depending upon the interaction between solvent molecules and hydrogen peroxide molecules. The intensity of this peak can be monitored once every 30 s, enabling the measurement of changes in hydrogen peroxide co...

Journal: :Zeitschrift fur Naturforschung. Section C, Biosciences 1982
W H Kalus W G Filby R Münzner

It has been proposed that the mutagenic activity associated with the ascorbic acid autoxidation system may involve hydrogen peroxide and peroxide radicals. We report here that the system may involve hydrogen peroxide and peroxide radicals. We report there that the mutagenic effect may also partially reside in as yet unknown secondary products. The observed mutagenicity of 2,3-diketogulonic acid...

Journal: :The Journal of biological chemistry 1975
D A Webster

The formation of hydrogen peroxide during the oxidation of NADH by purified preparations of cytochrome o has been demonstrated by employing three independent methods: polarographic, colorimetric, and fluorometric. The first two methods were used to assay for the accumulation of hydrogen peroxide and showed that hydrogen peroxide did accumulate as a product, but only about 30% of the oxygen cons...

2002

The formation of hydrogen peroxide during the oxidation of NADH by purified preparations of cytochrome o has been demonstrated by employing three independent methods: polarographic, calorimetric, and fluorometric. The first two methods were used to assay for the accumulation of hydrogen peroxide and showed that hydrogen peroxide did accumulate as a product, but only about 30% of the oxygen cons...

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