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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 6    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 6,June 2012
Comparative Studies on the Prevalence of Bacterial Population and Physicochemical Analysis in Raw and Pasteurised Milk with special reference to Honey as a Natural Preservative
Full Text(PDF, )  PP.879-886  
Author(s)
V.Karthikeyan, S.Ramya, Reshma.V.K
KEYWORDS
Raw milk, Pasteurised milk, Microbiological, Physicochemical analysis, Proteolytic, Lipolytic, Natural Preservative
ABSTRACT
In this research, fifteen raw milk samples from different areas and ten pasteurized milk samples of various brands were collected and compared based on microbiological tests and physicochemical analysis. The milk samples were plated on nutrient agar medium and the isolates were then cultured on different media (EMB Agar, McConkey Agar, Skim Milk Agar). These cultured bacterias were then subjected to confirmative tests. The bacterias isolated were Escheritia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Bacillus cereus. The milk samples were further subjected to physico-chemical analysis in which Fat content, Clearance Lactometric Reading, Solid Non Fat and Acidity were calculated. The quality of the milk samples were then analysed by Methylene Blue Reduction Test and Clot on Boiling Test.The isolated bacterias were also tested for their proteolytic and lipolytic property and were also subjected to catalase tset. Further the effect of honey as a natural preservative of milk was also analysed by studying the dilution of honey at which the maximum zone of inhibition was observed
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