Chemical sensitivity mixtures

Thus, the elementary cellular structure could be regarded as an intrinsic characteristic of fhe detonation in a mixture at given initial composition, temperature, and pressure. The dimension of X is of fhe order of magnitude of millimeters or less for gaseous mixfures with oxygen, but several centimeters for less sensitive mixtures (even larger, for methane/air af afmospheric pressure). It decreases when the initial pressure increases. Its variation with the initial temperature is more complicated and depends on the value of fhe reduced activation energy of fhe chemical reactions. The value of... 

In view of the sensitivity of the developing organism, place more emphasis on toxicity studies involving gestational and perinatal exposure to a chemical or mixture of chemicals. 

During World War II PETN was also used, although to a lesser extent than cyclonite, since the former is more sensitive to impact and has a lower chemical stability. Mixtures of various compositions were employed according to their intended use. The most widely used mixture comprised 50% PETN and 50% TNT. This was employed in the molten state for filling hand and anti-tank grenades, and powdered and compressed, for filling detonators. 

Multiple chemical sensitivity (MCS) or multiple chemical intolerance (MCI) is a term used to describe a variety of symptoms associated, in some cases, with exposure to indoor air contaminants. Individuals with this syndrome seem to respond to very low levels of chemicals, and the condition can involve various organ systems. It appears to be induced by a wide variety of agents, but once induced it can be triggered by low-concentration exposures to numerous other chemicals. Indoor air pollutants not only appear to set off symptoms in the chemically intolerant, but several studies suggest that some pollutants or pollutant mixtures may also initiate the condition. This phenomenon has been described in... 

See also Behavioral Toxicology Dose-Response Relationship Exposure Assessment Mixtures, Toxicology and Risk Assessment Multiple Chemical Sensitivities Neurotoxicity Pollution, Air Indoor Psychological Indices of Toxicity Respiratory Tract Sensory Organs. 

Membranes can be used to separate molecules that differ in size, polarity, ionic character, hydrophilicity, and hy-drophobicity.100 Their use is less energy-intensive than distillation. They can often separate azeotropes and close-boiling mixtures. They can sometimes replace traditional methods, such as solvent extraction, precipitation, and chromatography, that can be inefficient, expensive, or may result in the loss of substantial amounts of product. Thermally and chemically sensitive molecules can be handled. Membranes can be porous or nonporous, solid or liquid, organic or inorganic. 

AZIDA de BARIO (Spanish) (18810-58-7) Highly unstable in dry form. Dust forms explosive mixture with air. Heat, shock, or friction can cause spontaneous decomposition and explosion. Forms shock-sensitive mixtures with lead and other heavy metals. Contact with barium, iron, or sodium will increase its sensitivity to explosion. Contact with acids forms corrosive hydrogen azide. Reacts violently with oxidizers, carbon disulfide. Commercially available in ethyl alcohol. Keeping the chemical wet greatly reduces its explosion hazard. 

CALCIUM NITRATE (10124-37-5) A strong oxidizer. Violent reaction with reducing materials. Forms shock-sensitive mixtures with organic contaminants. Incompatible with combustible materials (wood, cloth, oil, grease, etc.), organics, and other easily oxidizable materials, chemically active metals, aluminum nitrate, ammonium nitrate, cyanides, esters, phosphorus, sodium hypophosphate, thyocyanates. Con osive to many substances, including aluminum. 

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