Characteristics of Lipolytic System in Goat Milk

Chilliard, Yves; Selselet‐Attou, Ghalem; Bas, Pierre; Morand-Fehr, P.

doi:10.3168/jds.s0022-0302(84)81569-6

Cited by 51 publications

(25 citation statements)

References 22 publications

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“…These authors considered their results consistent with those of Linzell and Peaker ( [29]; cited by Azzara & Dimick [2]) who observed that hourly milkings through the physiological administration of ocytocin activated paracellular passage of blood components through the mammary epithelium. These latest observations would be compatible with the former hypothesis, although it would need to be confirmed in cows because goat's milk LPL is secreted through different mechanisms than cow's milk LPL [6,9]. The absence of an effect of once-daily milking on plasmin activity and plasminogen-derived activity has already been noted by Knutson et al [24] (plasmin only) and Lacy-Hulbert et al [26], but not by Kelly et al [22] or Stelwagen et al [41], who noted an increased activity.…”

Section: Discussionsupporting

confidence: 75%

Combined effects of once-daily milking and feeding level in the first three weeks of lactation on milk production and enzyme activities, and nutritional status, in Holstein cows

et al. 2002

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-Twenty-four multiparous cows were divided into 4 groups immediately after calving according to a 2 × 2 factorial design: 2 milking frequencies (1 daily [morning only] milking for the first three weeks of lactation, then 2 daily milkings vs. 2 daily milkings throughout) under two diet energy concentrations (normal or low). The trial lasted 30 weeks, on average, and ended in the pasture on 28 May 2000. During the winter period, the cows were housed together in a free-stall barn, and were given complete rations ad libitum. The cows that were not milked were significantly more vocal than the controls, close to the omitted milking, and in a large number of them, milk leaked from the udder. Once-daily milking gradually reduced the amount of milk secreted in relation to that produced by cows milked twice a day, with differences of 8.5 kg·d -1 (P < 0.01) at week 3. As early as the first week of resumption of twice-daily milking, that difference ceased to be statistically significant but amounted to 1.3 kg·d -1 (P > 0.10) throughout the rest of the trial. Once-daily milking did not affect the contents of milk fat, true protein, serum albumin and lactose contents or somatic cell count, plasmin activity and plasminogen-derived activity. That treatment also increased the G1 immunoglobulin concentration (P = 0.02; measured at week 3) and reduced milk lipoprotein lipase activity. Once-daily milking improved the nutritional status at the beginning of lactation (reduced live weight and body condition losses, and increased the computed energy balance) and had no effect on the ration intake. The normal-energy diet produced expected results, in relation to the low-energy diet: a significant increase in intake (1.2 kg DM·d -1 ), milk yield (3.1 kg·d -1 ), milk protein content (2.0 g·kg -1 ), and nutritional indices, in particular. The decrease in milk yield induced by once-daily milking during the (0)4 73 98 13 80; e-mail: remond@gentiane.enitac.fr first three weeks of lactation was 5.5 kg·d -1 in the low-energy group and 8.5 kg·d -1 for the normal energy group (non-significant interaction; P > 0.10). once-daily milking / level of feeding / milk production / enzyme activities / nutritional status Résumé -Effets de la traite une fois par jour combinée au niveau d'alimentation pendant les trois premières semaines de la lactation sur la production et les activités enzymatiques du lait, et l'état nutritionnel, chez des vaches Holstein. Vingt-quatre vaches multipares ont été réparties dès le vêlage en 4 lots, selon un schéma factoriel 2 × 2 : 2 fréquences de traite (1 traite par jour pendant les 3 premières semaines de lactation, puis 2 traites par jour vs. 2 traites par jour en permanence) × 2 concentrations énergétiques de la ration (normale ou basse). L'essai a duré en moyenne 30 semaines et s'est terminé au pâturage, le 28 mai 2000. Pendant la période hivernale, les vaches étaient logées ensemble dans une stabulation libre à logettes et recevaient à volonté une ration complète. La traite omise était celle du soir. Les vac...

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Section: Discussionsupporting

confidence: 75%

Combined effects of once-daily milking and feeding level in the first three weeks of lactation on milk production and enzyme activities, and nutritional status, in Holstein cows

et al. 2002

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“…Milk is produced by mammals. For instance, goat is one of the most versatile domestic animals that can adapt to different stressful climatic conditions, such as arid, humid, tropical, cold, desert, and mountain climates [4]. Moreover, goats provide people with many substantial products, such as meat, milk, yogurt, cheese and other dairy products, skins, mohair, cashmere, draft and pack power, and highquality manure for crops [3].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant activity of goat's milk from three different locations in Malaysia

Alyaqoubi

Abdullah

Addai

2014

AIP Conference Proceedings

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Abstract. This study was conducted to evaluate the antioxidant activities of two types of goat milk obtained from three different farms in Malaysia named: Semenyih, Johor Baharu and Bander Baru Bangi . Milk from Jamnupari goat breed and a crossbred of Jamnupari and Saanen were investigated in terms of antioxidant capacity based on total phenol content (TPC), ferric reducing antioxidant power (FRAP), and 2,2-diphenyl-1-picrylhydrazyl (DPPH). Goat milk samples exhibited a significantly different antioxidant capacity (P>0.05) through all the samples. Jamnupari exhibited the highest capacity parity in TPC, FRAP, and DPPH assays (544.08 mg GA/100 g FW, 481.69 mg TE/100 g FW, and 64.77 %, respectively). By contrast, the milk sample obtained from the crossbred of Saanen and Jamnupari obtained from a UK farm exhibited the lowest values (354.14 mg GA/100 g FW, 313.58 mg TE/100 g FW, and 55.29 %, respectively). The samples obtained from the traditional farm in Bander Baru Bangi exhibited higher average values (523.80 mg GA/100 g FW, 439.33 mg TE/100 g FW, and 63.78%, respectively) than those from other sites.

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“…L'activité lipolytique du lait de chèvre, mise en évidence par Chilliard et Fehr (1976) a une particularité. Alors que dans le lait de vache la lipase naturelle (lipoprotéine-lipase, LPL) est liée aux micelles de caséines, dans le lait de chèvre, environ 45% de la LPL est liée à la crème (Chilliard et al, 1984), et l'on observe, G Ricordeau contrairement à la vache, une bonne corré-lation entre la lipolyse spontanée et la quantité de LPL présente dans le lait (Chilliard et al, 1981). Il en résulte que, chez la chèvre, la lipolyse spontanée et l'activité LPL du lait évoluent dans le même sens sous l'effet des facteurs physiologiques et nutritionnels (Chilliard, 1982).…”

Section: Historiqueunclassified

État des recherches sur le lait de chèvre en France

Ricordeau¹

1993

Lait

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Résumé -Avec un effectif de 960 000 chèvres, la production laitière totale est de 450 millions de litres, dont 58% de collecte industrielle, soit 39 000 t de fromages laitiers (industrie) et 17 000 t de fromages fermiers. En 1992, les performances des 236 000 chèvres au contrôle laitier (100 chèvres par élevage) étaient de 681 kg de lait, avec un taux de protéines vrai de 29,0 glkg et un tauxbuty-

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Characteristics of Lipolytic System in Goat Milk

Cited by 51 publications

References 22 publications

Combined effects of once-daily milking and feeding level in the first three weeks of lactation on milk production and enzyme activities, and nutritional status, in Holstein cows

Combined effects of once-daily milking and feeding level in the first three weeks of lactation on milk production and enzyme activities, and nutritional status, in Holstein cows

Antioxidant activity of goat's milk from three different locations in Malaysia

État des recherches sur le lait de chèvre en France

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