Daily material conversion

In 1 ml of aqueous extract of cotton dust, there may be as much as 30 ug of endotoxin-like material moreover, most dust extracts contain endotoxin. Cotton extracts are pyrogenic in rabbits, but daily injections produce tolerance, an effect similar to that of purified endotoxins. Further, rabbits made tolerant to injections of cotton extracts are also tolerant to I.V. injections of purified abortus equi endotoxin. Conversely, rabbits made tolerant to endotoxins are also tolerant to cotton extracts (62). 

Science, mathematics, and technology are interconnected. Teaching Chemistry incorporates the other sciences as well as other disciplines, such as mathematics. For example, graphs and charts are frequently used to record and analyze data. On a daily basis, we are surrounded with mathematics in the ability to make various measurements of mass and size, in the conversions betweens the numerous units, and in tabulating amounts of materials. Beyond these basic skills, mathematical and algebraic skills are used in a plethora of chemical calculations from determining the percent composition of elements in a compound to estimating the mass of reactants needed in a reaction. 

The double contact process including double absorption is shown in the block block diagram in Chapter 1 with the raw material—sulfur. In general, SO2 feed gases containing up to 12 vol.% SO2 are used for this process. The conversion efficiency in new plants can reach about 99.6% as a daily average in the case of sulfur burning. 

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