الفهرس 
Chemical analysis of milkOnly 14 pages are availabe for public view
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Abstract
In part I of the present study samples of milk for lcanufacturing
were collected and analysed over a period of one year .
In section A , the milk samples were analysed for gross chemical
composition and the attained results can be summarized in the following :
1 - The maximum TS content (14.3%) and the minimum average (12.76%)
were recorded in Dec. and Jul. in order . Winter mdk had the highest TS
(13.74%) , whereas summer milk had the lowest TS (12.89%) .
2- The maximum fat content (4.52%) and the minimum average (3.97%)
were recorded in Feb. and Oct. in order . Winter milk had the highest fat
content (4.4%) , whde autumn milk had the lowest average value
(4.17%) .
3- The maximum (4.37%) and the minimum (2.79%) protein content as
averages were observed in Dec. and Aug. respectively . Winter and
summer milk had the maximum (3.83%) and the minimum (3.04%)
protein content in order .
4- The maximum casein content (3.33%) was recorded in Nov. and Dec. ,
whereas the minimum average (2.1 8%) was observed in Aug. Winter
and summer milk had the maximum (2.86%) and the minimum (2.23%)
casein content respectively .
5- Both us- CN (1.97%) and P- CN (0.75%) average had their maximum
values in Nov., whereas the minimuin values of 1.0 and 0.38% were
recorded in Sept. and Aq. respectively . Winter milk had the highest
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a,-CN (1.51%) and P-CN (0.63%) , whereas the corresponding
minimum values of 1.12 and 0.46% were recorded in summer .
6- The maximum (0.39%) and minimum (0.18%) K-CN averages were
recorded in Dec. and Feb. in order . Summer milk had the highest
content (0.33%) in th~s respect , whereas winter milk had the lowest
(0.27%) K-CN .
7- The maximum (0.979%) and minimulll(0.373%) serum protein contents
(SP) were recorded in Dec. and Sept. in order . Winter milk had the
maximum (0.704%) SP content , while spring milk had the minimum
(0.499%) content in this respect .
8- Lactose content was the highest (4.8%) in Aug. and the lowest (4.4%)
in Jul. The maximum (4.66%) and the minimum (4.59%) lactose
contents were observed in winter and summer in order .
9- Casein 1 fat ratio was the hghest (0.8) in Nov. , and was the lowest
(0.5) in Aug. Autumn and summer milk had the highest (0.7 1) and the
lowest (0.53) ratios in order .
10- Statistical analysis showed that month and season of the year had a
hghly significant effect on TS , protein , casein and a&N . P- CN
was sipficantly affected by month of the year ( p < 0.01) and by
different seasons ( p < 0.05) . K- CN was affected only ( p < 0.01) by
month of the year . Serum protein , lactose and casein / fat ratio were
affected by month of the year ( p < 0.01) , whereas seasons had no
effect in this respect . Fat content was not affected in all cases .