Read e-book online Biotechnology of aroma compounds : with 44 tables / [...] PDF

By Ralph G Berger; Jan A M de Bont

ISBN-10: 3540614826

ISBN-13: 9783540614821

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Read Online or Download Biotechnology of aroma compounds : with 44 tables / [...] XD-US PDF

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Extra resources for Biotechnology of aroma compounds : with 44 tables / [...] XD-US

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These include the cloning of genes for various enzymes such as [3-galactosidase and proteinases into lactobacilli so as to increase their metabolic versatility and range of applications in the food industry. Similarly, rather than a new activity, higher activity may just be required as in the case of microbial strains producing L-phenylalanine as a precursor of the high intensity sweetener Aspartame, where the number of gene copies has been increased so as to increase microbial productivity and reduced manufacturing costs.

For instance: OH pH 4 pH~ Another bioprocess for synthesising esters uses Geotricium fragans. This microorganism partially metabolises leucine or related amino acids such as isoleucine by oxidative deamination. The addition of ethanol to the reactor results in esterification forming flavour esters such as ethylisovalerate in a one-step reaction. The product can be recovered easily from the exit gases by adsorption onto activated charcoal. NH2- CH - COOH O = CH - COOH I CHO 1 CH 2 CH2OH F ~ l CH 2 CH@ ....

Genetic engineering has, so far, had little impact on producing materials with substantially improved functional characteristics; for instance, natural colours tend to be rather weak in intensity and unstable, and there is no obvious way in which genetic engineering could be used to overcome this inherent and generic problem. Many industrial enzymes widely used in the food industry are now produced using cloned producer strains in which the gene for the enzyme has been cloned into a host organism for easy and cost-effective large scale production by fermentation.

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Biotechnology of aroma compounds : with 44 tables / [...] XD-US by Ralph G Berger; Jan A M de Bont

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