Chemische Lebensmittelkonservierung

Lück, Erich

doi:10.1007/978-3-642-96402-2

Cited by 27 publications

(13 citation statements)

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“…dehydrogenases and the sulfhydryl enzymes fumarase and aspartase (12,16,29). The tricarboxylic acid cycle plays a central role in catabolic and anabolic processes in fungi.…”

Section: Discussionmentioning

confidence: 99%

Stimulation of aflatoxin B1 and T-2 toxin production by sorbic acid

Gareis¹,

Bauer²,

Montgelas³

et al. 1984

Appl Environ Microbiol

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Aspergillus flavus grown on yeast extract-sucrose medium produced higher amounts of aflatoxin B1 in the presence of 0.025% sorbic acid than without this chemical with a maximum at 17 days of incubation. Addition of 0.05 to 0.0125% sorbic acid stimulated T-2 toxin production of Fusarium acuminatum cultures grown on maize meal. The highest amounts of the mycotoxin were detected in 14-day-old cultures containing 0.025% sorbic acid. It is assumed that certain amounts of sorbic acid near the minimal inhibitory concentration reduce the activity of the tricarboxylic acid cycle; this may lead to an accumulation of acetyl coenzyme A, which is an essential intermediate in the biosynthesis of aflatoxin B1 and T-2 toxin.

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“…dehydrogenases and the sulfhydryl enzymes fumarase and aspartase (12,16,29). The tricarboxylic acid cycle plays a central role in catabolic and anabolic processes in fungi.…”

Section: Discussionmentioning

confidence: 99%

Stimulation of aflatoxin B1 and T-2 toxin production by sorbic acid

Gareis¹,

Bauer²,

Montgelas³

et al. 1984

Appl Environ Microbiol

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“…The counts of Lactobacilli were generally lowered to a smaller extent. This antibacterial effect might be explained by the protons (H + ions) and anions (HCOO" ions) into which formic acid is divided after passing the bacterial cell wall and which have a disruptive effect on bacterial protein synthesis (Luck, 1986). In practical terms this means that the bacterial cells are placed under considerable stress and are unable to replicate.…”

Section: Mode Of Actionmentioning

confidence: 99%

Organic acids as feed additives for young pigs: Nutritional and gastrointestinal effects

Roth¹,

Kirchgeßner²

1998

J. Anim. Feed Sci.

127

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Experimental data show that a significant improvement of growth rate and feed conversion rate of weanling pigs can be achieved by the inclusion of organic acids in the diet. These ergotropic effects have been mainly observed with formic, lactic, sorbic, fumaric, citric and malic acid as well as with different salts of formic acid. The lowering of dietary pH alone, with inorganic acids (o-phosphoric acid, HC1), however failed to show any nutritive efficacy. Studies on the mode of action of organic acids indicate that they cause a higher protein and energy digestibility and retention, an alteration of bacterial populations and metabolites in the gastrointestinal tract and possibly an effect on metabolism. It seems likely that the antimicrobial properties of organic acids and of their salts are of great importance for their beneficial effects in weanling pigs.

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“…However, each fifth time interval the organism alternatingly skips the required transition or executes two consecutive transitions in one time interval. Thus, after each period of ten time intervals the organism reaches the stage we would expect from the DOL model, but in between it periodically speeds up and slows down its growth rate [9,11 ]. This can be stated as:…”

Section: Organisms With Periodical Change Of Division Ratementioning

confidence: 99%

“…In some experiments on algae, a distinction is made between four cell types, and then not by observed characteristics but according to ancestry and position only [9]. If the environmental conditions are changed, these experimentalists observe no other cell types but changes in size and division times [10]. Yet, in order to account for differences in cell behavior induced by time or extracellular agents, the automata theorist is inclined to postulate a very large number of cell states.…”

Section: Introductionmentioning

confidence: 99%