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65578

EFFECT OF SOME TECHNOLOGICAL TREATMENTS ON THE MINERAL BALANCE BETWEEN THE SOLUBLE AND COLLOIDAL PHASES OF CAMEL MILK

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Last updated: 04 Jan 2025

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Abstract

In dairy technology, mineral equilibrium in milk is important for understanding milk properties and for optimizing milk processing. The objective of this study was to examine the effect of some technological treatments (acidification, cold storage and heat treatments) on the mineral balance between the soluble and colloidal phases of camel's milk by using ultracentrifugation technique. The results showed that, as the pH reduced, the calcium (Ca), phosphate (P), magnesium (Mg) and citrate (Cit) present in the colloidal phase of camel's skim milk (CSM) were gradually displaced into the soluble phase. When the pH of CSM decreased to 4.7, the almost colloidal Ca and P were solubilized (more than 92.2 and 93.5%), respectively. Moreover, the colloidal Mg and Cit were totally solubilized at pH 5.2 and remained constant until pH 4.7. Furthermore, at this pH value small amounts of Mg and Cit were bound to colloidal casein (1.5-3%), respectively. Also, at pH 4.7 the ratio of colloidal Ca/P decreased from 2.07 to 1.68. On the other hand, the results affirmed that the cold storage of CSM at 4 ºC over a period of 7 days had marked influence on the concentration and distribution of Ca, P, Mg and Cit in camel milk. After 7 days of cold storage at 4ºC of CSM there were an increase in the soluble Ca, P, Mg and Cit contents by 11.9, 10.5, 5.3 and 9.0%, respectively. Furthermore, increasing heating temperature caused a significant decrease in the soluble Ca, P and Cit, but insignificant (p<0.05) effect on the Mg concentration was observed. Moreover, increasing heating temperature on CSM resulted in a significant decrease in the colloidal ratio of Ca/P from 2.07 to 1.64. Moreover, when CSM was boiled-treated, the soluble Ca, P, Mg and Cit concentration decreased by 6, 9.6, 5.6 and 8.5%, respectively. Pasteurization LTLT (Low-Temperature Long-Time) and HTST (High-Temperature Short-Time) led to a slight increase in the colloidal Ca, P, Mg and Cit concentration.

DOI

10.21608/zjar.2016.65578

Keywords

camel milk, mineral balance, soluble and colloidal phase

Authors

First Name

Alaa

Last Name

Ibrahim

MiddleName

H.

Affiliation

Des. Res. Cent., Dept. Anim. and Poult. Breed., Cairo, Egypt

Email

alaa.drc@gmail.com

City

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Orcid

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Volume

43

Article Issue

6

Related Issue

9895

Issue Date

2016-11-01

Receive Date

2016-09-19

Publish Date

2016-11-01

Page Start

2,145

Page End

2,158

Print ISSN

1110-0338

Online ISSN

3009-7193

Link

https://zjar.journals.ekb.eg/article_65578.html

Detail API

https://zjar.journals.ekb.eg/service?article_code=65578

Order

20

Type

Original Article

Type Code

842

Publication Type

Journal

Publication Title

Zagazig Journal of Agricultural Research

Publication Link

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

MainTitle

EFFECT OF SOME TECHNOLOGICAL TREATMENTS ON THE MINERAL BALANCE BETWEEN THE SOLUBLE AND COLLOIDAL PHASES OF CAMEL MILK

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Article

Created At

24 Dec 2024