The fuel and the oxidant are intermixed in average stoichiometric proportions and the mass flow rates of the fuel or the oxidant or both are intermittent and have a regular pulsation.
The fuel and oxidant are combusted to produce a projected flame and are intermixed in a turbulent mixing layer where the fuel and oxidant are in close contact with one another within eddies.
If the fuel, the oxidant or both are pulsed at a frequency having a magnitude in the order of the magnitude as the frequency at which turbulence is generated from mean flow instabilities, the strong hydrodynamic instabilities cause plurality of subregions to be formed on a microscopic scale throughout the flame.
Oxidant stress and damage occur as an inevitable consequence of the use of oxygen.
Alaskan sled dogs are at increased risk of oxidant damage because of their high rate of oxygen consumption during exercise and because of the prolonged duration of the exercise that they perform.
Exercise was associated with a significant decline in serum vitamin E concentration, an increase in plasma isoprostane concentration, and an increase in serum creatine kinase activity.
Oxidant damage occurs when oxygen atoms in the cell, either free and on their own (or as part of another molecule), become reactive and interact with many other molecules in the cells.
Oxidant stress is a common, and often harmful, condition in many cell types and is felt to be an important part of the damage to the lungs caused by smoking.
In conclusion, it appears that Hsp 72 expression is a sensitive indicator of oxidant stress in the airway epithelium and may be valuable in continued investigations into the role,that oxidant stress plays in the cell injury caused by tobacco smoke.
Oxidant concentrations are presented in parts per million (ppm) in air.
At the time of adoption of this standard, "oxidant" was thought to include ozone, nitrogen dioxide, hydrocarbons, photochemical aerosols, and possible other unknown oxidants.
Because of the large number of hydrocarbons involved, the complexity of the photochemical reactions, and the reactivity of other compounds such as nitrogen dioxide and ozone, it was not considered possible to establish "serious" and "emergency" levels for hydrocarbons at that time.
MIOX : Products : Oxidant Storage(Site not responding. Last check: 2007-10-17)
Once the disinfectant is generated, it is stored in a tank for injection into the water supply.
Oxidant Tank – this provides some redundancy for the system and is typically sized for 12 to 24 hours worth of oxidant supply
It can be configured as a liquid barrier safety venting system with no operator intervention required or as a forced air dilution system using blowers.
As beta carotene (a preliminary stage of vitamin A) is sometimes recommended as an anti oxidant and Astaxanthin supplies carotenoids, it should be safe to take - although a precise dosage has yet to be established.
Fruits and vegetables with brightly coloured skins are generally considered to be relatively high in phenolics as are the skins and seeds of the grapes (vitus vinifera) used to make red wine.
The objective of the study was to determine whether a moderate supplement of antioxidant vitamins given to 77 healthy men eating less than the recommended 5 to 9 daily servings of fruits and vegetables would alter biomarkers of oxidant damage associated with disease risk.
The 39 nonsmokers and 38 smokers, age 20 to 51 years, were given a daily supplement (272 mg vitamin C, 31 mg all-rac-alpha-tocopherol, and 400 micrograms folic acid), or placebo, for 90 days with their usual diet.
In healthy young men, the endogenous antioxidant defense system and a modest intake of dietary antioxidants are adequate to minimize levels of in vivo oxidant damage such that they cannot be differentiated by current methods.
As shown in B, oxidant stress causes phosphorylation (P) and redistribution of occludin, decreased levels of VE-cadherin (possibly mediated by endocytosis), disruption of linkage to cortical actin filaments through catenins and actin-binding proteins, and phosphorylation of PECAM-1.
There is clear indication that oxidant stress promotes increased leukocyte adhesion to vascular endothelium (63, 141, 176).
oxidant induction of ICAM-1 and the PMN chemoattractant IL-8 is
Oxidants are added to water and wastewater for disinfection, slime removal, oxidation of undesirable inorganic species (e.g., ferrous iron, reduced manganese, sulfide, and ammonia) and oxidation of organic constituents (e.g., taste- and odor-producing compounds and trihalomethane precursors).
Oxidant demand refers to the difference between the added oxidant dose and the residual oxidant concentration measured after a prescribed contact time and at a given pH and temperature.
Four methods for determining oxidant demands are given: one method each for chlorine and chlorine dioxide and two methods for ozone (batch and semi-batch methods).
Put in another way, the oxidant removes electrons from another substance, and is thus reduced itself.
Oxidants are usually chemical substances with elements in high oxidation numbers (e.g., H
Thus, in the reaction, the reductant or reducing agent loses electrons and is oxidized and the oxidant or oxidizing agent gains electrons and is reduced.
Oxidant Hypersensitivity of Fanconi Anemia Type C-deficient Cells Is Dependent on a Redox-regulated Apoptotic Pathway -- Saadatzadeh et al.
Articles by Saadatzadeh, M. Articles by Haneline, L. Oxidant Hypersensitivity of Fanconi Anemia Type C-deficient Cells Is Dependent on a Redox-regulated Apoptotic Pathway
oxidants, it is unknown whether the molecular mechanism responsible
For the purpose of setting air quality standards in California, "oxidant" was defined as an oxidizing chemical that reacts with a reagent that cannot be oxidized by the oxygen (O
In the early days of measuring pollutants in air, scientists were uncertain about which of the photochemical oxidants, such as ozone or nitrogen dioxide, were associated with certain health effects.
Scientists found that health effects such as eye irritation, visibility effects and crop damage correlated well with photochemical oxidants measured as a group by ARB's
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Environmental Oxidant Pollutant Effects on Biologic Systems: A Focus on Micronutrient Antioxidant-Oxidant Interactions ...(Site not responding. Last check: 2007-10-17)
Environmental Oxidant Pollutant Effects on Biologic Systems: A Focus on Micronutrient Antioxidant-Oxidant Interactions -- Cross et al.
56), and of inflammatory–immune cell "oxidants" on respiratory
are the separation of direct effects of the inhaled oxidant,
