Download A Complete Course in Canning and Related Processes, by Susan Featherstone PDF

By Susan Featherstone

A entire path in Canning is firmly confirmed as a different and crucial advisor to canning and similar techniques. pros within the canning and scholars have benefited from successive variants of the publication for over a hundred years. This significant re-creation maintains that popularity, with broadly revised and extended insurance. The three-title set is designed to hide all making plans, processing, garage and quality controls stages undertaken by way of the canning in an in depth, but obtainable style. significant adjustments for the hot version comprise new chapters on rules and labelling that distinction the placement in several areas all over the world, up-to-date info on bins for canned meals and new details on validation and optimization of canning techniques, between many others.

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Read or Download A Complete Course in Canning and Related Processes, Fourteenth Edition: Volume 2 Microbiology, Packaging, HACCP and Ingredients PDF

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Extra info for A Complete Course in Canning and Related Processes, Fourteenth Edition: Volume 2 Microbiology, Packaging, HACCP and Ingredients

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This water activity corresponds to a 10% salt (NaCl) solution, which is why salting is sometimes used as a method of preservation. • Temperature: Most strains grow optimally at 40 °C, but some of the psychophilic strains can grow at temperatures as low as 3 °C. ) inhibit C. botulinum growth. • Microbial competition. For years, laboratories connected with the canning industry and others have studied C. botulinum, its heat-resistance and processing recommendations for low-acid foods. While studying the growth requirements for C.

2). 1  Swells Swells are caused by gas production by micro-organisms or by chemical reactions. The microbiological swell can be from inadequate sterilization, contamination through a leak, or thermophilic spoilage (see Volume 2, Chapter 1). When significant numbers of cans swell soon after processing, there is no evidence of leakage and the general run has a good vacuum, it is very safe to conclude that the cause is underprocessing (given too little heat treatment, either as a result of a processing deviation or if an incorrect heat process was given).

Six types of C. e. types A, B, C, D, E, and F. Each type produces a specific and somewhat different exotoxin, but each toxin causes similar symptoms. Anti-toxins or serums are specific to the particular type of toxin, but polyvalent vaccines are available. Intoxication is caused by ingestion of the exotoxin produced by the organism C. botulinum; it is not caused by the organism itself. The toxins are inactivated by heat in 10 min at 100 °C (212 °F). Types A, C, and D are proteolytic, that is, they produce an extremely foul and putrid odour, while types B and E do not produce this odour.

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