The Vitamin B12 Requirement of White Leghorn Chicks
نویسندگان
چکیده
منابع مشابه
Metabolism of dehydroretinyl ester in White Leghorn chicks.
1. The metabolism of dehydroretinyl ester has been studied in vitamin-A-deficient white leghorn chicks. Dehydroretinyl ester was metabolized to 3-hydroxyretinol diester, 3-hydroxyanhydroretinol and rehydrovitamin A2 which were isolated from the intestines and livers of chicks. 2. The metabolism of 3-hydroxyretinol diester and 3-hydroxyanhydroretinol, which were immediate metabolites of dehydror...
متن کاملEffect of vitamin B12 on the intermediary metabolism of chicks.
In 1953, the authors (1) reported that a decrease of thiamine and vitamin B12 was found in the blood as the result of the energy metabolism of cattle, and that the deficiency of the vitamins was com pletely protected against by a prophylactic injection of the vitamins at the beginning of the experiment. The intimate relation between both vitamins and metabolism was thus recognized for the forma...
متن کاملEvidence regarding the minimal daily requirement of dietary vitamin B12.
The minimal daily requirement of dietary vitamin B12 is defined as that amount which must be ingested in the diet to prevent the occurrence of megaloblastosis, anemia, or other manifestations of vitamin B12 deficiency. An attempt has been made to define this requirement by studying hematological responses to varying amounts of the vitamin in five south Indian subjects with vitamin B12 deficienc...
متن کاملOrigin of Anti-human Blood Group B Agglutinins in White Leghorn Chicks
While anti-human blood group B agglutinins are present in the majority of ordinary White Leghorn chicks by the age of 30 days, none could be demonstrated in germfree chicks up to the age of 60 days. Anti-B agglutinins in trace amounts were first found in germfree chicks 66 days old and increased to an average titer of about 1:2 by 91 days of age. This titer amounts to about 10 per cent of that ...
متن کاملWhite Centered Retinal Hemorrhages in Vitamin B12 Deficiency Anemia
BACKGROUND To report a case of severe vitamin B(12) deficiency anemia presenting with white centered retinal hemorrhages. METHODS Interventional case report. RESULTS A 40-year-old man, general practitioner himself, presented with a 1-day history of diminished left visual acuity and a drop-shaped central scotoma. The corrected visual acuities were 20/20, OD and 20/100, OS. Ophthalmic examina...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1956
ISSN: 0032-5791
DOI: 10.3382/ps.0350342