دراسة محتوي حليب الماعز من الجسيمات الكازينية مختلفة الحجوم و توزيع الأجزاء الكازنية فيها من خلال مرحلة حلب كاملة

Abstract EN

This study was conducted at the research and teaching farm at the Dept.

of Animal Resources- College of Agriculture- AL-Qasim Green University for the period from 15/11/2014 to 15/2/2015.

The study included five female goats ranged from 2-3 years of age.

Milk samples collected and tested to estimate the distribution on of casein parts in milk by using high-speed centrifuge (with different speed) after isolating fat from it and save it.

Also, molecular weight for casein parts was estimated by using electric electrophoreseis.completely Randomized Desigen(CRD) with (SAS 2012) was used for study and Duncan test was used for means compoison.

The results of this study showed that fresh milk contains 3.00 – 3.51% fat, 8.67 – 8.84% SNF materials, 1.023 – 1.031 relative density, 3.22 – 3.27 % protein, 4.75 – 4.96 % lactose, 0.525 – 0.566 freezing point, PH for the milk ranged between 6.67 – 6.77, and the boiling point for the milk was 105.55 – 106.0.

The results also showed that the proportion of large, medium, and small casein particles ranged between 41.48 – 43.64, 33.59 – 34.88, and 22.12 – 23.19 respectively.

This study concluded that milking stage didn’t have significant effect on the molecular weight of casein parts in the different size of casein particles