[Study on development of the principles for determination and evaluation of antimicrobial effectiveness of food preservatives].

Objective: To establish the principles for determination and evaluation of the preservative properties demonstrates the effectiveness of a substance when used as a food preservative.

Methods: Sorbic acids were chosen as the model food preservative and the Gram positive bacterium Staphylococcus aureus, Gram negative bacteria Escherichia coli and Salmonella enteritidis, yeast Candida albicans and the filamentous fungus Aspergillus niger, A. flavas, Geotrichum candidum, Penicillium islandicum and Peniciuium cyclopium were employed as the experimental microorganisms.

Natural occurrence of aflatoxins in Chinese peanut butter and sesame paste.

A study on the natural occurrence of aflatoxins in Chinese peanut butter and sesame paste samples was conducted. Aflatoxin B(1) (AFB(1)) was the predominant toxin detected abundantly and frequently at a level up to 68.51 microg/kg in 41 of 50 peanut butter samples and 20.

[Molecular biology of aflatoxin biosynthesis].

This review provides several important breakthroughs on the molecular biology of aflatoxin biosynthesis and information on the regulation and evolution of the aflatoxin pathway, and the elimination of the toxin from the food chain as well.

[Study on the effect of the growth and aflatoxin production by Aspergillus flavus parasiticus NRRL 2999 in the present of Lactobacillus plantarum ATCC 8014].

The effect of L. plantarum ATCC 8014 on growth and aflatoxin B1 production of A. flavus subsp.

[Biological synthesis and application of bacteriocins].

Bacteriocins produced by lactic acid bacteria are a heterogeneous group of peptide inhibitors. Most of bacteriocins have relatively narrow inhibitory spectra. A few of them have wider inhibitory spectra, being active against a wide range of gram-positive bacteria.

Fusarium toxins in wheat from an area in Henan Province, PR China, with a previous human red mould intoxication episode.

Wheat samples of the 1998 and 1999 crops from Puyang, an area in Henan Province, PR China with a previous human red mould intoxication episode, were analysed for trichothecenes and zearalenone (ZEA). For the 1998 Puyang crop, deoxynivalenol (DON) was the predominant toxin detected abundantly and frequently at a level of up to 14,000 microg kg(-1) (mean 2850 microgkg(-1)) in 30 of 31 (97%) wheat samples. Among these were 21 (70%) with a DON level that exceeded the Chinese regulation of 1,000 microg kg(-1).