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003 EG-GiCUC
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008 210123s2020 ua dh f m 000 0 eng d
040 _aEG-GiCUC
_beng
_cEG-GiCUC
041 0 _aeng
049 _aDeposite
097 _aM.Sc
099 _aCai01.10.06.M.Sc.2020.Sa.M
100 0 _aSamaa Youssif Mohamed
245 1 0 _aMicrobiological quality of some commercial dairy products /
_cSamaa Youssif Mohamed ; Supervised Abeer A. Awad , Lamiaa Ibrahim Ahmed
246 1 5 _aالحالة الميكروبيولوجية لبعض منتجات الالبان بالاسواق
260 _aCairo :
_bSamaa Youssif Mohamed ,
_c2020
300 _a160 P. :
_bcharts , facimiles ;
_c25cm
502 _aThesis (M.Sc.) - Cairo University - Faculty of Veterinary Medicine - Department of Food Hygiene and Control
520 _apastries, Ice cream, Ras cheese and Fresh white soft cheese] were collected randomly from dairy shops and supermarkets in port said and Giza governorates, Egypt and subjected to chemical & microbiological examination for determination of their hygienic and microbiological quality. Chemical examination showed that themean titratable acidity % of Fresh cream, Cream filled pastries, Ice cream, Ras cheese and White fresh soft cheese samples was 0.11 ± 0.0096, 0.14 ± 0.01, 0.13 ± 0.01, 0.43 ± 0.02 and 0.14 ± 0.02, respectively, while the mean Acid value, Free fatty acid% and Peroxide values in the examined Cream and Cream filled pastries were (0.18, 0.093%& 0.31 Meq/kg) and (1.38, 0.17% & 2.2 Meq/kg), microbiological examination revealed that the mean counts of Total mesophilic count were 3.5 {u00D7} 10⁷ ± 1.55 {u00D7} 10⁷, 42 {u00D7} 10⁵ ± 0.37 {u00D7} 10⁵, 15 {u00D7} 10⁵± 6.2 {u00D7} 10⁵, 3.2 {u00D7} 10⁹ ± 21 {u00D7} 10⁹ and 5.9 {u00D7} 10⁶ ± 1.5 {u00D7} 10⁶ cfu/g in theexaminedCream,Cream-filled pastries,Icecream,Ras cheese and White fresh soft cheese samples, respectively. Aerobic spore formers were determined in 50 and 70% of Cream & Cream filled pastries samples, respectively; while anaerobic spore formers were determined in 66.7% of Ras cheese samples with mean value of 4.2 {u00D7} 103cfu/g. most of the examined samples were contaminated with high numbers of coliforms, yeast, mold and Staphylococci. E.coli was isolated from Cream filled pastries (6.9%), White fresh soft cheese (4.4%) and Ras cheese (2.9%), Y. enterocolitica was isolated from 23.3% of the examined Ice cream samples while Listeria monocytogenes couldn't be isolated from the examined Ice cream and Fresh white soft cheese
530 _aIssued also as CD
653 4 _aFree fatty acid%
653 4 _aFresh cream
653 4 _aPeroxide value
700 0 _aAbeer A. Awad ,
_eSupervisor
700 0 _aLamiaa Ibrahim Ahmed ,
_eSupervisor
856 _uhttp://172.23.153.220/th.pdf
905 _aNazla
_eRevisor
905 _aShimaa
_eCataloger
942 _2ddc
_cTH
999 _c79656
_d79656