Test-day records as a tool for subclinical ketosis detection
نویسندگان
چکیده
منابع مشابه
Detection of Subclinical Ketosis in Dairy Cows
Received: Revised: Accepted: July 16, 2011 October 02, 2011 October 24, 2011
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Backgrounds: Subclinical ketosis can cause greater economic loss due to a lack of clinical symptoms. Objectives: The present study was aimed to design a chemical method for measuring serum ketone bodies in the affected subclinical cows. Methods: Acetoacetate concentrations were measured using a nitroprusside reaction and b-hydroxy butyric acid (BHBA) which was oxidized to acetoacetate using nan...
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Dairy cattle experience a remarkable shift in metabolism after calving, after which milk production typically increases so rapidly that feed intake alone cannot meet energy requirements (Bauman and Currie, 1980; Baird, 1982). Cows with a poor adaptive response to negative energy balance may develop hyperketonemia (ketosis) in early lactation. Cows that develop ketosis in early lactation lose mi...
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The liver of the cow is a cross-road of nitrogen metabolism in dairy cows. Urea is synthesized in the liver as a results of unused degradable protein in the rumen, the absorption of excess amino acids from rumen undegradable protein, and from the catabolism of amino acids that are not utilized for productive purposes. Dietary crude protein (CP, % of DM) is the one single dietary factor most clo...
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Objective: It is well-known that all living cells emit ultra-weak photon emission (UPE), which is due to byproducts of chemical reactions in cell metabolisms. It has been shown that Reactive Oxygen Species (ROS) in the cells enhances the UPE intensity. The magnitude of such UPE is extremely weak (i.e. a few to 103 photons/ (sec.cm2)), and the detection of such ultra-weak signals is hardly possi...
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ژورنال
عنوان ژورنال: Acta veterinaria
سال: 2009
ISSN: 0567-8315
DOI: 10.2298/avb0903185g