الفهرس 
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Abstract
7. ENGLISH SUMMARY
A total of 90 samples of dried dairy products represented as dried ice-cream mix (45) , full cream milk powder (15), dried whey (15) , and dried whipped cream (15) samples , were randomly collected from groceries and supermarkets. All samples were still valid for consumption as shelf life at least to be one year from production time. The collection samples were transmitted to the laboratory for evaluation.
7.1. Compositional quality evaluation of examined Dried Dairy products
7.1.1. Moisture content:
The mean value of moisture content of Chocolate ice cream, Strawberry ice cream and Vanilla ice cream were 0.32 ± 0.06, 0.30 ± 0.09 and 0.37 ± 0.09, respectively.
All examined samples of dried mix were complied with Egyptian Standards, (1414/ 2005) which stated that moisture content should not more than 5%.
The mean values of moisture content of the examined full cream milk powder samples were 0.40±0.05. All examined samples were complied with Egyptian Standards , (1648/ 2005).
The mean value of moisture content of examined dried whey protein sample was (0.50±0.07). All examined samples of whey protein were complied with Egyptian Standards, (4135-1 /2005).
The Moisture content of examined dried whipped cream samples was 0.45±0.07 All examined samples of dried whipped cream comply with Egyptian Standards, (1599/2005).
7.1.2. Acidity percent of examined Dried Dairy products:
The mean value of acidity content of examined dried Vanilla ice cream mix was 0.05 ± 0.008.
The mean value of acidity percent of the examined full cream milk powder samples was 0.22±0.009,All examined samples were complied with Egyptian Standards (1648/2005) .
The mean value of Acidity percent of examined whey protein samples was 0.23±0.04, All examined samples of whey protein were complied with Egyptian Standards, (4135-1/2005) which stated that acidity % should not more than 0.35%.
The mean value of acidity content of examined dried whipped cream samples was 0.039±0.007.
7.2. Microbiological evaluation of examined Dried Dairy products
7.2.1. Aerobic mesophilic bacterial Count:
The mean value of Aerobic mesophilic bacterial count of dried Chocolate ice cream, Strawberry ice cream and Vanilla ice cream mix were 1.16x104±0.14x104, 0.55x104±0.16x104 and 0.34x104± 0.09x104, respectively.
All examined samples of dried Chocolate ice cream, Strawberry ice cream and Vanilla ice cream mixes for Aerobic mesophilic bacterial count, respectively were complied with Egyptian Standards (1414/2005) which stated that Aerobic mesophilic bacterial count should not more than 105.
The mean value of Aerobic mesophilic bacterial count of full cream milk powder was 0.31 x104± 0.09 x 104 cfu/g.
66.66% of examined samples of full cream milk powder for Aerobic mesophilic bacterial count were complied with Egyptian standard , (1648/ 2005).
The mean value of Aerobic mesophilic bacterial count of whey protein powder was 2.55 x103± 0.82 x103 cfu/g.
All examined samples of whey protein powder for Aerobic mesophilic count were complied with Egyptian standard, (4135-1/ 2005).
The mean value of Aerobic mesophilic bacterial count of dried whipped Cream was 1.8 x103± 0.37 x103.
7.2.2. Coliforms count and incidence of Pathogenic E. coli:
The mean value of Coliforms counts of dried Chocolate ice cream, and Vanilla ice cream mixes were 3.8 x102± 1.4 x102, 0.00 and 2.0 x10± respectively.while Strawberry ice cream samples was free from coliforms.
All the examined samples of dried Chocolate ice cream, Strawberry ice cream and Vanilla ice cream (<10) for coliforms count were not complied with Egyptian standard, (1414/2005).
The mean value of Coliforms count of full cream milk powder was 6.66x10± 0.5 x10.
The mean value of coliforms count of whey protein powder samples was 2.9 x102± 0.0.
The mean value of coliforms count of whey protein powder samples was 2.9 x102± 0.0.
Only one sample of dried whey protein was not complied with Egyptian standard, (4135-1/2005)for Coliforms count.
All samples of dried whipped Cream samples were free from coliforms.
Coliform count failed to be detected in all examined samples of dried whipped cream.
7.2.3. Enterococci count:
The mean value of Enterococci counts of dried Vanilla ice cream was 2.75 x103± 1.65 x103 cfu/g, respectively.
All examined samples of dried chocolate, strawberry and vanilla ice cream (<10) for Enterococci count were complied with Egyptian standard, (1414/2005).
The mean value of Enterococci content of Milk Powder was 4.3x102± 1.7 x102 cfu/g.
The mean value of Enterococci content of Whey Protein powder was 0.92x102± 0.69 x102 cfu/g.
Enterococci count failed to be detected in all examined samples of dried whipped cream.
7.2.4. Yeast count.
The mean value of yeast count of dried Chocolate ice cream, Strawberry ice cream and Vanilla ice cream mixes were 0.91 x104± 0.32 x104, 1.01x103± 0.42 x103 and 1.0 x102± 0.00, respectively.
The mean value of yeast content of full cream milk powder was 0.78x103± 0.63 x103 cfu/g.
66.66% of the examined samples of full cream dried milk powder (<10) for yeast count were complied with Egyptian standard (1648/2005)
The mean value of yeast count of whey protein powder was 2.3x102± 0.88 x102 cfu/g.
All positive samples of whey protein for yeast count were not complied with Egyptian standard, (4135-1/2005).
Yeast count failed to be detected in all examined dried whipped cream samples.
7.2.5. Mold count:
The mean value of mould count in dried Chocolate ice cream, Strawberry ice cream and Vanilla ice cream were 0.64x103± 0.22 x103,1.3 x103± 0.86 x103 and 1.14×102± 0.14 x102, cfu/g, respectively.
The mean value of mould count in full cream milk powder was 1.8x103± 0.8 cfu/g.
86.66% of full cream milk powder for mould count were not complied with Egyptian standard, (1648 /2005).
The mean value of mould count in dried whey protein was 2.15 x103± 1.19 x103 cfu/g.
53.33% of examined dried Whey Protein for mould count were not complied with Egyptian standard, (4135-1/2005).
The mean value of mould count in dried whipped cream was 1.7x103± 1.05 x103 cfu/g.
73.3% of the examined samples of Dried Whipped Cream for mould count were not complied with Egyptian standard, (1599/2005).
Enteropathogenic E.coli failed to be detected in all examined dried dairy products samples.