Chemical basis of quality factors

Chemical Basis of Quality Factors in Fruits and Vegetables... 

The texture of ice cream is an important quality factor to consumers. What is the chemical basis for the gritty or sandy-like texture that detracts from ice cream s pleasant taste ... 

Public awareness of air quality as a green issue and associated health concerns have also boosted interest in this area. The consumer has begun to demand the right to make an informed choice and select products on the basis of chemical emissions. As public awareness of this issue has grown, companies ranging from car manufacturers to paint producers have started to use low emissions as a marketing tool, that is, as a factor by which to differentiate themselves and their products from their competitors. 

In Canada and the USA, there is agreement on the nse of a factor of 10 for interspecies differences and another factor of 10 for intraspecies differences. The US Food Quality Protection Act (FQPA) of 1996 and the Canadian Pest Control Products Act (PCPA) of 2002 require that when establishing food tolerances in the case of threshold effects, an additional tenfold safety factor for the pesticide chemical residue and other sources of exposure be applied to infants and children to take into account potential pre- and post-natal toxicity and completeness of the data with respect to exposure and toxicity to infants and children. A different safety factor for the pesticide chemical residue may be used only if, on the basis of reliable data, such a factor will be safe for infants and children. 

Thus, the basic physical-chemical mechanisms of the volatilization of lead compounds and the factors governing the formation of flash smelting dusts, depending on the quality of the lead feeds treated and the dimensions of the Kivcet unit, are explained on the basis of generalizations and the kinetic analysis of a wide range of experimental data on the production and composition of the Kivcet smelting dust. 

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