Liebig's work on applying chemistry to plant and animal physiology was especially influential. By 1842, he had published , published in English as , presenting a chemical theory of metabolism.:185 The experimental techniques used by Liebig and others often involved controlling and measuring diet, and monitoring and analyzing the products of animal metabolism, as indicators of internal metabolic processes. Liebig saw similarities between plant and animal metabolism, and suggested that nitrogenous animal matter was similar to, and derived from, plant matter. He categorized foodstuffs into two groups, nitrogenous materials which he believed were used to build animal tissue, and non-nitrogenous materials which he believed were involved in separate processes of respiration and generation of heat.:184
One of his most recognized accomplishments is the development of nitrogen-based . In the first two editions of his book (1840, 1842), Liebig reported that there was not sufficient nitrogen in the atmosphere, and argued that nitrogen-based fertilizer was needed to grow the healthiest possible crops.:120 Liebig believed that nitrogen could be supplied in the form of , and recognized the possibility of substituting chemical fertilizers for natural ones (animal dung, etc.)
Vetalogica Canine Joint Formula 150g - Chempro Online Chemist
Alexander Marcet (1770-1822), physician and animal chemist.
Drug testing using animals became important in the twentieth century. In 1937, a pharmaceutical company in the USA created a preparation of sulfanilamide, using diethylene glycol (DEG) as a solvent, and called the preparation ‘Elixir Sulfanilamide’. DEG was poisonous to humans, but the company's chief pharmacist and chemist was not aware of this. He simply added raspberry flavoring to the sulfa drug, which he had dissolved in DEG, and the company marketed the product. The preparation led to mass poisoning causing the deaths of more than a hundred people. No animal testing was done. The public outcry caused by this incident and other similar disasters led to the passing of the 1938 Federal Food, Drug, and Cosmetic Act requiring safety testing of drugs on animals before they could be marketed.Pet chemists can work in a range of settings with varying responsibilities, but all are involved somehow in studying chemical processes related to animals. Most pet chemist duties are chiefly concerned with pharmaceuticals, either in terms of creating specific pet medications or dosing human drugs for animal ailments. Chemists can work in labs, in pharmacies, or in veterinary clinics.Drug Metabolism: Positions for BS/MS/PhD chemists. While entry level candidates for BS/MS positions may be considered, we prefer experience in DMPK, especially in pharmaceutical/biotechnology industry settings. For in vitro DM candidates, this includes experience conducting CYP (P450), protein binding and microsome/hepatocyte stability assays along with other standard DM assays. Candidates for an in vivo DMPK position should have experience with animal handling, animal surgery and rodent pharmacokinetic dose and draw.Postdoctoral position in cellular/molecular neurobiology is available at Vanderbilt University Medical Center . The successful candidate will join a research group that employs a highly multidisciplinary approach to explore the cellular and molecular mechanisms involved in neuromodulation and regulation of animal behavior. The laboratory uses a combination of biochemical, molecular biological, imaging, electrophysiological and behavioral techniques to study regulation of neuronal function by metabotropic glutamate receptors and other G-protein-linked receptors. Also, we have a strong interest in relating cellular and molecular changes to disorders of the central nervous system, including Parkinson's disease and schizophrenia.