The aim was to study the distribution of the mare milk main whey proteins separated by HPLC. 42 individual milks of Italian Saddle Horse nursing mares reared in 14 farms in Northern Italy were analysed. Mares, 500-600 kg liveweight and 3-22 years old (1-16 parities), were fed with hay ad libitum (10-13 kg) and 4-5 kg of concentrate. Milk was taken by total manual milking of one gland, while the foal was suckling the other. Nitrogen compounds were determined by Kjeldahl; whey proteins were separated by reversed-phase HPLC. Data were analysed by ANOVA. For the nitrogen fractions the following mean values were obtained: crude protein 2.34±0.31; casein 1.24±0.20; true whey protein 0.87±0.15; non-protein N (x6.38) 0.24±0.03 g per 100 g of milk. For the whey proteins the following percentage distribution was observed: ß-lactoglobulin 41.80±6.48%; α-lactalbumin 33.02±6.42%; blood serum albumin 4.97±2.37%; immunoglobulin 20.21±6.21%.The milk produced in the 2nd month of lactation (n=19) contains less protein and less whey protein in toto compared to the milk produced from the 5th to the 30th lactation day (n=23). The percentage distribution values of the whey protein individual fractions, instead, show moderate differences statistically not significant.
Percentage distribution of the main whey proteins in milk of Italian Saddle Horse nursing mares during the first two lactation months / Martuzzi, Francesca; Tirelli, A; Summer, Andrea; Catalano, Antonio Lucio; Mariani, Primo. - 5:(1999), pp. 341-341. (Intervento presentato al convegno 50° Annual Meeting European Association for Animal Production tenutosi a Zurich, Switzerland nel 22-26 August 1999).
Percentage distribution of the main whey proteins in milk of Italian Saddle Horse nursing mares during the first two lactation months
MARTUZZI, Francesca;SUMMER, Andrea;CATALANO, Antonio Lucio;MARIANI, Primo
1999-01-01
Abstract
The aim was to study the distribution of the mare milk main whey proteins separated by HPLC. 42 individual milks of Italian Saddle Horse nursing mares reared in 14 farms in Northern Italy were analysed. Mares, 500-600 kg liveweight and 3-22 years old (1-16 parities), were fed with hay ad libitum (10-13 kg) and 4-5 kg of concentrate. Milk was taken by total manual milking of one gland, while the foal was suckling the other. Nitrogen compounds were determined by Kjeldahl; whey proteins were separated by reversed-phase HPLC. Data were analysed by ANOVA. For the nitrogen fractions the following mean values were obtained: crude protein 2.34±0.31; casein 1.24±0.20; true whey protein 0.87±0.15; non-protein N (x6.38) 0.24±0.03 g per 100 g of milk. For the whey proteins the following percentage distribution was observed: ß-lactoglobulin 41.80±6.48%; α-lactalbumin 33.02±6.42%; blood serum albumin 4.97±2.37%; immunoglobulin 20.21±6.21%.The milk produced in the 2nd month of lactation (n=19) contains less protein and less whey protein in toto compared to the milk produced from the 5th to the 30th lactation day (n=23). The percentage distribution values of the whey protein individual fractions, instead, show moderate differences statistically not significant.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
