Oxidative shock

Kimura, Y. and Kimura, H. (2004). Hydrogen sulfide protects neurons from oxidation shocks. FASEB J., May 20 (e-pub ahead of print). 

AMMONIUM PERMANGANATE (13446-10-1) Forms explosive mixture with air (flash point 30°F/— 1°C). A strong oxidizer. Shock-sensitive may explode from impact and/or at elevated temperatures (above 135°F/57°C). Violent reaction with reducing agents, combustible materials, other oxidizers. Keep away from sunlight, acetic acid, acetic anhydride. 

BENZOYL CHLORIDE, 3,5-DINITRO-(99-33-2) Combustible solid. A strong oxidizer. Shock-, heat-, friction-sensitive explosive. Dust or powder forms explosive mixture with air. Contact with moisture causes decomposition and formation of hydrogen chloride fumes. 

Precaution Flamm. dangerous fire risk oxidizer shock and heat-sensitive explosive... 

Precaution Strong oxidizer shock-sensitive explosive may explode when heated... 

Experiments carried out during early stationary phase cultures (a carbon starvation condition that provokes a rapid PHA degradation) of P. oleovorans and its phaZ minus mutant showed that the mutant strain was more sensitive to heat and oxidative shocks than the wild type. In P. putida, impaired survival and resistance to oxidative stress of an rpoS mutant was shown under conditions inducing PHA accumulation (Raiger-Iustman and Ruiz 2008). 

The pool of enzymes which are in charge of the destruction of the free radicals resulting from an oxidative shock is found in the cytoplasmic membrane as well as in the mitochondrial ones. As the molecule of luminol is smaller than that of lucigenin it may enter the cell and react with the reactive oxygen species generated in the mitochondria, while lucigenin is only capable to detect the species discharged into the environment. 

Lee C, Vranckx S, Heufer KA, et al. On the chemical kinetics of ethanol oxidation shock mbe, rapid compression machine and detailed modehng study. Z Phys Chemie-Int J Res Phys Chem Chem Phys. 2012 226 1—27. 

Dichlorine h ptoxide, CljO, is the most stable of the chlorine oxides. It is a yellow oil at room temperature, b.p. 353 K, which will explode on heating or when subjected to shock. It is the anhydride of chloric(VlI) acid (perchloric acid) from which it is prepared by dehydration using phosphorus(V) oxide, the acid being slowly reformed when water is added. 

It also has potential use in ceramic and glass formulas, as the oxide has a high melting point and imparts shock resistance and low expansion characteristics to glass. 

The reaction follows a free radical mechanism and gives a hydroperoxide a compound of the type ROOH Hydroperoxides tend to be unstable and shock sensitive On stand mg they form related peroxidic derivatives which are also prone to violent decomposi tion Air oxidation leads to peroxides within a few days if ethers are even briefly exposed to atmospheric oxygen For this reason one should never use old bottles of dialkyl ethers and extreme care must be exercised m their disposal... 

SiHcon nitride (see Nitrides) is a key material for stmctural ceramic appHcations in environments of high mechanical and thermal stress such as in vehicular propulsion engines. Properties which make this material uniquely suitable are high mechanical strength at room and elevated temperatures, good oxidation and creep resistance at high temperatures, high thermal shock resistance, exceUent abrasion and corrosion resistance, low density, and, consequently, a low moment of inertia. Additionally, siHcon nitride is made from abundant raw materials. 

Oxidation. Hydrogen peroxide is a strong oxidant. Most of its uses and those of its derivatives depend on this property. Hydrogen peroxide oxidizes a wide variety of organic and inorganic compounds, ranging from iodide ions to the various color bodies of unknown stmcture in ceUulosic fibers. The rate of these reactions may be quite slow or so fast that the reaction occurs on a reactive shock wave. The mechanisms of these reactions are varied and dependent on the reductive substrate, the reaction environment, and catalysis. Specific reactions are discussed in a number of general and other references (4,5,32—35). 

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