Vitamin A and Carotenoids in Blood Serum of Dairy Cattle

Parrish, D.B.; Wise, George; Hughes, J. S.

doi:10.1021/ac60015a011

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…It is probable that native cattle produce more concentrated colostrum than high yielding Holsteins [31]. The diet of native cattle of heavily grazed pasture, rough foraging, and agricultural and vegetable waste, is of variable quality which might affect the quantity of IgG in colostrum [32,33], particularly if the overall protein is low. The daily yields of colostrum and milk could also be decreased, particularly is energy intake is suboptimal, or daily water intake is low.…”

Section: Discussionmentioning

confidence: 99%

Colostrum provision and care of calves among smallholder farmers in the Kaziranga region of Assam, India

Hopker

Pandey²,

Goswami³

et al. 2020

PLoS ONE

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Smallholder cattle farming in Assamese villages is sub-optimal in terms of calf survivability, growth, age at first service, and milk yield. Proper understanding of the local situation is essential to formulate appropriate, locally driven, livestock keeper education to sustainably improve animal health, welfare and productivity. In-depth interviewing and direct observation were used to understand the farming strategies, husbandry practices and challenges to health and productivity in a cluster of typical villages in the Kaziranga region of Assam, India, where resource use is balanced between the needs of humans and livestock, with competition from wild species. Knowledge of the importance of colostrum consumption by calves is poor. Timely consumption of sufficient colostrum (locally called "phehu") by calves was clearly sub-optimal in the majority of households. The reasons behind this are nuanced, but the practice of collecting colostrum from newly calved cows to make confectionery for human consumption is an important contributory factor. Care of the umbilicus of the newborn is not routine practice in the locality. Local women are the key group assisting with young and sick animals, including cases of simple dystocia and retained foetal membranes. Cows are usually milked once daily, to attempt to balance the needs for milk of household with those of the calf, which can result in suboptimal nutrition for calves. There are clear opportunities to improve animal health and productivity through locally provided farmer education, particularly with reference to colostrum provision, and the engagement of women farmers in any such programme is key to success.

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Section: Discussionmentioning

confidence: 99%

Colostrum provision and care of calves among smallholder farmers in the Kaziranga region of Assam, India

Hopker

Pandey²,

Goswami³

et al. 2020

PLoS ONE

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“…Preliminary estimations of carotene and vitamin A were carried out using the method described by Kimble (1939) for blood plasma. Poor recoveries of vitamin A added as internal standard indicated the presence of colour inhibitors in amounts greater than encountered in blood plasma, and for the lymph samples the Kimble method was modified to include saponification as described by Parrish, Wise, and Hughes (1948).…”

Section: (B) Transport Of Vitamin a From The Intestines To The Livermentioning

confidence: 99%

The Conversion of Carotene to Vitamin a in Sheep and Cattle

Wa¹

1951

Aust. Jnl. Of Bio. Sci.

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SummaryIt has been established that the conversion of carotene to vitamin A in the sheep occurs in the wall of the intestine. This conclusion is based on surviving tissue experiments in which sections of intestine have been incubated with carotene and the product conclusively identified as vitamin A by colorimetric and spectrophotometric methods. It is further supported by the high vitamin A levels in intestinal as compared with non-intestinal lymph, and similar observations with cattle suggest the intestine as the site of conversion in this species also.

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“…The presence In natiiral products of substances which in terfere vith the measurement of the antimony trichloride-vi tamin A color has been recognized by a number of workers (12,18,35,42,54,65,81,155,165,166,173,178).…”

Section: -mentioning

confidence: 99%

Chemistry of glycerol dichlorohydrin as a reagent for the determination of vitamin A

Allen¹

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Vitamin A and Carotenoids in Blood Serum of Dairy Cattle

Cited by 9 publications

References 15 publications

Colostrum provision and care of calves among smallholder farmers in the Kaziranga region of Assam, India

Colostrum provision and care of calves among smallholder farmers in the Kaziranga region of Assam, India

The Conversion of Carotene to Vitamin a in Sheep and Cattle

Chemistry of glycerol dichlorohydrin as a reagent for the determination of vitamin A

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