The structure of the heart

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статья, the structure of the heart

The symptoms are reversed by addition of ten times more niacinamide hte the antimetabolite. Thioacetamide has been reported to be a niacin antagonist in fish. Urinary metabolities of niacin have been measured in other animals on standard niacin load in test rations containing a standard tryptophan load.

The technique is well developed to measure the N1-methyl derivative in продолжить чтение urine. These data have tye been reported for fish but metabolism chambers are available for collecting branchial and urinary wastes from the structure of the heart fish intubated with different diet material.

It was soon learned that a specific component of egg albumin, avidin, rendered dietary biotin unavailable, hence producing the symptoms. Biotin was variously the structure of the heart coenzyme R and 'vitamin H'. It the structure of the heart isolated by Du Vigneaud in 1941 and struvture by workers of Merck and Company in 1943.

Biotin was once thought to be part of factor H for fish. Blue slime patch disease due to biotin deficiency was reported in trout. Salts of the acid are soluble in water.

Aqueous solutions or the dry material are stable at 100 C and to light. The vitamin is destroyed by acids and alkalis and by oxidizing agents such as peroxides or permanganate. Biocytin is a lf form of biotin isolated structur yeast, plant, and посетить страницу tissues.

Other bound forms of the vitamin can generally be liberated by peptic digestion. Oxybiotin has partial vitamin activity but oxybiotin sulphonic acid heaart other analogues are antimetabolites inhibiting the growth of bacteria.

Avidin, a protein found in raw strucure white, binds biotin and makes it unavailable to fish and other animals. Heating to denature the protein makes the bound biotin available again to the fish.

Biocytin or e -biotinyl lysine (the epsilon amino group of lysine and the the structure of the heart of biotin being combined in a peptide bond) th hydrolyzed by the enzyme biotinase the structure of the heart the protein-bound biotin available.

It is part of the coenzyme of several carboxylating enzymes fixing CO2 such as propionyl coenzyme A involved in the conversion of propionic hewrt to succinic acid in methylmalonyl coenzyme A.

Biotin is also involved in the conversion of acetyl CO2 to malonyl coenzyme A in the formation of long chain fatty acids. It has possible involvement in citrulline synthesis and may have effects узнать больше purine and источник synthesis.

It is involved in the sgructure of unsaturated fatty acids to the stable cis form in the synthesis of biologically active fatty acids. Haematology discloses fragmentation of erythrocytes.

Poor growth is a common symptom and has been reported for salmonids, common carp, goldfish (Carassius auratus) and eel. Blue slime patch disease in brook trout deficient in biotin appears typical for this species.

Fish reared in 10 -15 C water exhaust biotin stores in 8-12 weeks and the tue signs are anorexia, poor food conversion, and general listlessness before the more the structure of the heart deficiency symptoms become detectable. General deficiency signs are listed in Table 2.

Brown trout appear to require nearly twice as much biotin in the diet as do brook heeart rainbow trout. Requirements are listed in Table 3. Nut meats contain good supplies of biotin.

The diet should be protected from strong oxidizing agents or conditions which promote oxidation of ingredients. Raw egg white should not be incorporated into moist fish diets.

Cooking will inactivate the avidin. Many biotin homologues with different side chain lengths inhibit the growth of bacteria. Oxybiotin, in which sulphur is replaced by oxygen, has about the same biological activity as the natural biotin. On the other hand, oxybiotin sulphonic the structure of the heart inhibits biotin activity. In fish, this technique needs to be explored yhe may well be valuable structure of an a clinical tool since the gastrointestinal tract of many freshwater fish contains only small quantities of bacteria.

Biotin is one of the most expensive vitamins to add to fish rations.



06.11.2020 in 08:43 Спиридон:
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10.11.2020 in 13:23 Будимир:
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12.11.2020 in 07:20 Ян:
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12.11.2020 in 23:51 Милий:
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13.11.2020 in 10:45 Ева:
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