Chemical contaminants present in foods are often unaffected by thermal processing (unlike most microbiological agents). Chemical contaminants can be classified according to the source of contamination and the mechanism by which they enter the food product.nvironmental contaminants are chemicals that are present in the environment in which the food is grown, harvested, transported, stored, packaged, processed, and consumed. The physical contact of the food with its environment results in its contamination. Possible sources of contamination include:
For the record,  cfprefsd is a fundamental part of the MacOS operating system. It's a tool developers use when they write their application, and allows an application to read/write/modify preferences files (like files ending in .plist, and others).
Chronic wasting disease (CWD) is a transmissible spongiform encephalopathy (TSE) of mule deer, white-tailed deer, elk (or wapiti), and moose (elk in Europe).To date, CWD has only been found in members of the deer family.irst recognized as a clinical wasting syndrome in 1967 in mule deer in a wildlife research facility in northern Colorado, USA, it was identified as a TSE in 1978 and has spread to free-ranging and captive populations in 23 US states and two Canadian provinces.