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Working with farmers , UCSC researchers at the Center for Agroecology & Sustainable Food Systems have been at the forefront of sustainable agriculture for years , developing alternatives to costly synthetic chemical fertilizers and pesticides . Using synthetic spectrum techniques with the abundances derived from the optical region data and FUSE archival spectra of normal and non-magnetic CP stars , we can identify approximately two-thirds of the absorption features in the FUSE spectrum of 17 Com A. MBOCA is a synthetic chemical used primarily to make polyurethane products . A toxin is any poisonous substance of microbial ( bacteria or other tiny plants or animals ) , vegetable , or synthetic chemical origin that reacts with specific cellular components to kill cells , alter growth or development , or kill the organism . Consequently , more cost-effective indirect or synthetic O-D estimation techniques have been developed , and continue to be developed . He used a synthetic ruby crystal with silver-coated ends surrounded by a flash tube to produce light energy . All of your new shiny FDA-sanctioned meds came through animal modelling and safety testing.Many vaccines are cultured in the eggs of animals.Insulin was originally from pigs , before the synthetic stuff came into being.In fact vaccus means cow ,... the smallpox vaccine was based on experience with survivors of cowpox.This basic insight led to other vaccines .