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Download PDF by Photis Papademas: Dairy Microbiology: A Practical Approach

By Photis Papademas

ISBN-10: 1482298678

ISBN-13: 9781482298673

The goal of this ebook is to supply a systematic heritage to dairy microbiology by means of re-examining the elemental techniques of basic nutrition microbiology and the microbiology of uncooked milk whereas providing a realistic method of the next facets: famous and newfound pathogens which are of significant problem to the dairy undefined.

Topics addressed contain Cronobactersakazakii and its significance to little one formulation milk or Mycobacterium avium subspecies paratuberculosis (MAP) that may be hooked up to power human ailments (Crohn’s), the position of dairy starter cultures in production fermented dairy items, constructing novel useful dairy items in the course of the incorporation of probiotic lines, insights within the box of molecular tools for microbial identity, and controlling dairy pathogens because of the obligatory program of foodstuff safeguard administration platforms (FSMS) to the dairy industry.

The publication will supply dairy execs and scholars alike the most recent info in this substantial subject.

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Additional resources for Dairy Microbiology: A Practical Approach

Sample text

Psychrotrophic bacteria As mentioned previously, upon withdrawal from the mammary gland, raw milk contains microorganisms at low concentrations, even under ideal milking conditions. If raw milk is to be collected by the dairy industry for further processing, it needs to be cooled and maintained at low temperatures in order to prevent microbial growth. Therefore, refrigeration is applied during the time interval between milking at the farm and processing at the dairy plant as a means to keep microbial counts to low levels and prevent milk microbiological deterioration.

Sampling no. 084 The geometric mean of a range of n values can be easily calculated. Probably the easiest way of calculation is with the use of spreadsheet computer packages. In Microsoft Excel, for instance, one can use the GEOMEAN function. If the user has no access to a software package, the geometric mean can be calculated with a simple calculator by multiplying all the n values and then taking the 1/n root of the product. 2. , the antilog of the mean of the log counts). 084). 084) is equal to the geometric mean.

The results of their study suggested that the populations of both coliforms and non-coliforms vary considerably and include a wide variety of Gram-negative species, even species that had not been associated with raw milk at the time. Coliforms were detected in ca. 4 log10 cfu/mL. Non-coliforms were present in ca. 8 log10 cfu/ mL). Pseudomonas was the most prevalent genus, as it accounted for ca. 50% of the total isolates and for ca. 74% of the non-coliforms. Spore-forming bacteria Spore-forming bacteria are a group of microorganisms that exhibit variable phenotypic characteristics with respect to oxygen requirements and temperature growth range and optima.

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Dairy Microbiology: A Practical Approach by Photis Papademas


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