نتایج جستجو برای: urea hydrogen peroxide

تعداد نتایج: 187226  

Journal: :The Journal of Automatic Chemistry 1998
Philippe Westbroek Edward Temmerman Paul Kiekens Filip Govaert

An automated sensor system for the continuous and in-line measurement of hydrogen peroxide in industrial applications is described. The hydrogen peroxide concentration can be measured over the entire pH range, over a wide concentration range of hydrogen peroxide (10(-3) 70 g/l), from 0 to 70( degrees )C, and with high precision and accuracy (errors less than 1% ). The system consists of a bypas...

Background and purpose: Oxidative stress is implicated in the pathogenesis of various diseases, including neurological disorders. In such stressful conditions, heat shock protein 70 (HSP70) protects cells, thus its pharmacological induction can be protective. The disaccharide trehalose exhibits various beneficial effects, including antioxidative effect. However, its impact on HSP70 is not obvio...

Mohammad Alipour, Shahram Ghanbari Pakdehi

In concentration of hydrogen peroxide, first, the solution should be quite pure, and then, it concentrate with methods such as vacuum distillation and cooling crystallization, because impurities in the hydrogen peroxide solution in high concentrations are causing decomposition of this substance; that is very dangerous. The purpose of this article is separation of chromium and magne...

In this work, we described a cost-effective and environmentally friendly technique for green synthesis of colloidal silver nanoparticles from aqueous extract of fresh leaves of Acacia melanoxylon and its application as a dopamine and hydrogen peroxide sensor. The prepared silver nanoparticles were characterized by UV-Visible absorption spectroscopy, X-ray diffraction (XRD), scanning electron mi...

Erfanmanesh, Fatemeh, Ghanati, Faezeh,

The production of reactive oxygen species occurs during the natural metabolism of oxidative-breathing cells. Among reactive oxygen species, hydrogen peroxide is more dangerous to cell life due to its long half-life, but it is meanwhile an important regulatory molecule in redox signaling in living things. Peroxidases are one of the key antioxidant enzymes that are widely distributed in nature an...

Journal: :Advanced Energy Materials 2022

Photoelectrochemical (PEC) water splitting is considered a promising technology to produce renewable hydrogen, clean fuel or energy carrier replace conventional carbon-based fossil-fuel sources. Nevertheless, the overall solar-to-hydrogen efficiency and cost-effectiveness of this are still unsatisfactory for practical implementation. This can be primarily attributed sluggish kinetics anodic oxy...

Journal: :The Journal of General Physiology 1956
C. S. Bachofer M. Aelred Pottinger

Bacteriophage T1 was suspended in distilled water and in phosphate buffer, saturated with oxygen, nitrogen, hydrogen, and carbon monoxide, and irradiated with gamma rays and x-rays. Under the same conditions phage was exposed to hydrogen peroxide. Oxygen acted as a protective agent against both irradiation and hydrogen peroxide inactivation. As a protective agent against irradiation, oxygen was...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Xiaodong Yan Xiaolei Shi Kalisha Hill Hai-Feng Ji

Detection of hydrogen peroxide is of industry interest and of biological importance. Here we report a new approach to hydrogen peroxide measurement using multilayer modified microcantilevers. Through a layer-by-layer nanoassembly technique, horseradish peroxidase was intercalated into a nanoscale multilayer assembly on one surface of microcantilevers. These enzyme-functionalized microcantilever...

2017
Dagmara Jacewicz Kamila Siedlecka-Kroplewska Joanna Drzeżdżon Agnieszka Piotrowska Dariusz Wyrzykowski Aleksandra Tesmar Krzysztof Żamojć Lech Chmurzyński

We have proposed a new method which can be applied in assessing the intracellular production of hydrogen peroxide. Using this assay we have examined the hydrogen peroxide generation during the L-glutamate induced oxidative stress in the HT22 hippocampal cells. The detection of hydrogen peroxide is based on two crucial reagents cis-[Cr(C2O4)(pm)(OH2)2]+ (pm denotes pyridoxamine) and 2-ketobutyra...

Journal: :Cardiology journal 2012
Yahya Islamoglu Habib Cil Zuhal Atilgan Mehmet Ali Elbey Ebru Tekbas Mehmet Yazici

Ingestion of acid-containing household products, either accidentally or as a suicide attempt, is a common form of intoxication. A clear and odorless liquid, hydrogen peroxide is an oxidizing agent found in most households and many industrial environments. Cardiovascular manifestations of hydrogen peroxide ingestion are extremely rare. Here we report a 60 year-old woman with acute inferolateral ...

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