| Acid-soluble purine and pyrimidine derivatives in cow's milk produced on normal feed and almost protein-free-feed with urea as the main nitrogen source. | |
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MedLine Citation:
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PMID: 1018716 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In two groups of Ayrshire cows (group I normal feeding with protein, group II got mostly urea as N-source), the TCA-soluble purine and pyrimidine derivatives of the milk were determined quantitatively. The O.D. [U/I] at pH 7-5 and 260 nm was higher in group II than in group I. The difference in N-nutrition of the animals has no influence on the composition of the purine and pyrimidine fractions investigated, especially with regard to orotic acid, uric acid, and CMP. At early stages of lactation the contents of CMP and uric acid were relatively high, but decreased with longer time of lactation. In opposition to this the orotic acid content increased in the same period. These tendencies could be registered in both groups. Besides CMP, uric acid, and orotic acid the minor nucleotides, NAD, AMP, GMP, UMP and others have been determined quantitatively. Their maximum has been found at the beginning of the lactation period and, in general, their contents were higher in group II than in group I. |
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Authors:
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R Rashid |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Die Nahrung Volume: 20 ISSN: 0027-769X ISO Abbreviation: Nahrung Publication Date: 1976 |
Date Detail:
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Created Date: 1977-04-25 Completed Date: 1977-04-25 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0142530 Medline TA: Nahrung Country: GERMANY, EAST |
Other Details:
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Languages: eng Pagination: 875-82 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed Animals Cattle Cytosine Nucleotides / metabolism Dietary Proteins Female Lactation Milk / metabolism* Nucleotides / metabolism Orotic Acid / metabolism Pregnancy Protein Deficiency* / metabolism* Purines / metabolism* Pyrimidines / metabolism* Urea* Uric Acid / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Cytosine Nucleotides; 0/Dietary Proteins; 0/Nucleotides; 0/Purines; 0/Pyrimidines; 57-13-6/Urea; 65-86-1/Orotic Acid; 69-93-2/Uric Acid |
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