Thus far, three methods have been used for the extraction of the parathyroid hormone from bovine parathyroid glands (2-4). The first was that introduced by Collip in 1925 (2) in which hot dilute hydrochloric acid was the extracting agent. Further purification of such acid extracts has proven difficult, but recently the purification of parathyroid polypeptides from such extracts has been reporte...

Thus far, three methods have been used for the extraction of the parathyroid hormone from bovine parathyroid glands (2-4). The first was that introduced by Collip in 1925 (2) in which hot dilute hydrochloric acid was the extracting agent. Further purification of such acid extracts has proven difficult, but recently the purification of parathyroid polypeptides from such extracts has been reporte...

In addition to the bound purine moieties of DNA and RNA, plants and animals contain a variety of other purine derivatives ranging in decreasing structural complexity from free nucleotides to simple substituted bases. Many of these compounds play important roles in metabolism and in its control and integration. Whereas most of the purine derivatives found in animal tissues also occur in plants, ...

(• ¯ " ‡ OE[ˆê • ")(‰ª • " • º ƒ') Some substances to promote the production of antibiotics were re ported already by many authors. According to Knight1) the use of corn steep liquor in the media of Penicillium chrysogenum increased the production of Penicillin. Koffler and others2) investigated on the promoting elements of corn steep liquor and reported that one element was the combination of ...

That Thiadiazoles derivative is biologically active as antimicrobial agents in cooling fluids.
 Derivatives of 1, 3, 4- thiadiazole have prepared:
 
 2-amino-3-[(2-amino-1, 4-thiadiazol-5-yl) dithio] propanoic acid.
 2-(2-Carbethoxyamino-1, 4-thiadiazol-5-yl)-thio acetic [(5-amino-1,3,4-thiadiazol-2-yl) acid
 The synthesized compounds been used against the microorganism...

Organic acids are considered as potential substrates for biosynthesis of polyhydroxyalkaonates. The acids may also be the metabolic inhibitors at moderate concentration levels. In this study, Ralstonia eutropha was used to elucidate the protein regulations when the bacterial cells pre-cultivated on glucose were exposed to three representative short chain organic acids, acetic, propionic and lev...

After the urine was treated with urease, lyophilized, and trimethylsilylated, it was examined for metabolic profiles in Dalmatian dogs and Shetland sheepdogs by gas chromatography-mass spectrometry (GC/MS), which simultaneously analyzes organic acids, amino acids, sugars, sugar alcohols, purine and pyrimidine bases, and nucleosides. The profiles were compared with those from human specimens. As...