Beta
78034

CHEMICAL COMPOSITION OF BOVINE MILK DURING THE FIRST WEEK POSTPARTUM AND ITS INFLUENCE BY SOME HEAT TREATMENTS

Article

Last updated: 30 Jan 2023

Subjects

-

Tags

-

Abstract

Bovine colostrum is the early milk produced by cows during the first several days postpartum. This early milk has a nutrient profile and immunological composition substantially different from mature milk. In the present study the chemical composition and immunoglobulin G (IgG) of bovine milk during the first week of postpartum were determined and the effect of heat treatments on bovine milk IgG contents was evaluated. Individual milk samples were collected from five cows at 0- 0.5, 1, 2, 3, 4, 5, 6 and 7 days postpartum. The obtained results showed that the total solids, total protein, fat and ash contents decreased irregular with time after parturition, while the lactose content increased. The concentrations of IgG were significantly higher during 0-0.5 and 1st days than those of other days postpartum, where the mean±SD of IgG concentrations were 122.60±5.24 and 118.44±5.90 g/L during 0-0.5 and 1st days postpartum, respectively. However, IgG concentrations were dropped markedly with time progress of lactation at the end of the first week (7th day), the mean±SD of IgG concentration was 55.16±17.30 g/L that dropped to 55.01% when compared with its concentrations at 0-0.5 day. IgG of bovine milk was influenced by heat treatments, where the concentrations of IgG in thermal treated milk were decrease to 28.24, 30.27 and 30.18% at 63°C/30 min and 57.33, 73.54 and 95.1% at 72°C/15 sec during 1, 2 and 3 days postpartum, respectively. On the other hand, the most thermal influence on IgG in milk was during thermal heated at 100°C/10 min, where the percentages of losses were 95.72% at 1st and 100% at 2 and 3 days postpartum.  

DOI

10.21608/zjar.2013.78034

Keywords

Bovine milk, Colostrum, immunoglobulin G (IgG), heat treatments

Volume

40

Article Issue

4

Related Issue

11650

Issue Date

2013-07-01

Receive Date

2013-04-18

Publish Date

2013-07-01

Page Start

733

Page End

746

Print ISSN

1110-0338

Link

https://zjar.journals.ekb.eg/article_78034.html

Detail API

https://zjar.journals.ekb.eg/service?article_code=78034

Order

10

Type

Original Article

Type Code

842

Publication Type

Journal

Publication Title

Zagazig Journal of Agricultural Research

Publication Link

https://zjar.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023