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Proteins hair, horse

Fibers that are taken from animals or hairy mammals such as Sheep, Wool, Goat (hair). Alpaca (hair). Horse (hair), etc., are animal fibers. Animal fibers generally comprise proteins, for example wool, silk, human hair, and feathers, etc. [99]. [Pg.346]

Z-Cystine has been obtained by the hydrolysis of a large number of proteins. However, the keratins are the only common proteins rich enough in cystine to serve as a source for this amino acid. Many investigators have devised methods for its isolation from the hydrolytic products of human hair,3 wool,2 horn,3 nail,3 feathers,3 and horse hair.4 The method of Folin5 is the basis for most of the others. The present method does not claim to give as high a yield as some of those reported in the literature, but is convenient and gives consistent results. [Pg.41]

Complete chemical analysis of the medulla of human hair fibers has not been reported. Studies of the medulla of human hair are complicated because it has poor solubility and is difficult to isolate. In fact, most of the experimental work on medulla has been on African porcupine quill, horse hair, or goat hair medulla rather than medulla of human hair fiber. Rogers [66] has described the amino acid composition of medullary protein isolated from porcupine quill, and his results are summarized in Table 2-7. [Pg.83]

As an aside, one might mention hair as a generally very stable matrix for most drugs and metabolites. These authors detected quantitatively sulfonamide and trimethoprim in horse tail hair 3 years after oral dosing in a horse, at a distance of 45-55 cm from the follicle. For the nitrofurans a MRPL of 1 p-g/kg has been set in the EU. Bound Residues and Nitrofuran Detection (FoodBRAND) comprises a rapid multi-residue screening test and also includes definitive multi-residue reference methods for protein-bound remnants of the nitrofurans. ... [Pg.96]

C. was first isolated from urinary tract stones and can be obtained from the hydrolysates of keratin-rich proteins such as horse hair (content 8%). C. is reductively cleaved by 2-mercaptoethanol or 1,4-dithiothreitol (Cleland s reagent) and oxidized by peroxyformic acid to cysteic acid. [Pg.170]

Hair consists of a fibrous protein called keratin, which, as proteins go, contains an unusually large percentage of the sulfur-containing amino acid cystine. Horse hair, for example, contains about 8% cystine ... [Pg.228]

We may well ask how materials as rigid as horses hoofs, as springy as hair, as soft as silk, as slippery and shapeless as egg white, as inert as cartilage, and as reactive as enzymes, can all be made of the same building blocks amino acids and proteins. The key lies mainly in the amino acid makeup itself. So far we have focused on the protein backbone and its shape. But what about the diverse R groups of the various amino acids How do they affect protein structure ... [Pg.517]


See other pages where Proteins hair, horse is mentioned: [Pg.301]    [Pg.38]    [Pg.51]    [Pg.80]    [Pg.565]    [Pg.389]    [Pg.365]    [Pg.231]    [Pg.40]    [Pg.373]   
See also in sourсe #XX -- [ Pg.214 ]




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