摘要:

Antimicrobial activities of various short chain alcohols and diols against a staphylococcus, a lactobacillus and a yeast, have been determined using a liquid culture system. There appears to be a relationship between carbon chain length and antimicrobial activity, and between molecular asymmetry and antimicrobial activity. Microorganisms which are resistant to the antimicrobial activity of propylene glycol have been found to be resistant to that of ethanol as well, as demonstrated by dilution plating of suspension cultures, and observations of single cells or small groups of cells in hanging drops. Cell membrane function interference is suggested as a mechanism of action since the inhibitory activity increases directly with reduced surface tension capability in the alcohol series.

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00391.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Foods, representative of Canadian eating habits as determined by a national nutritional survey were prepared for eating, categorized, and blended into eleven different groups or composites representing the dietary intake for each of five geographical regions. Portions were analyzed for pesticides, their derivatives and some industrial contaminants. Twenty‐four different residues representing organochlorine, organophosphorus, sulfur, nitroaniline, phthalonitrile and carbamate compounds were detected. Compounds reported for the first time are chlordane, methidathion, phosalone, toxaphene, chlorthalonil, dichloran, quintozene, sulfur, chlorpropham and PCB. Data are presented to show residue levels in different food composites, on a regional and seasonal basis. The average daily dietary intake is compared to previous survey data and indicates a general reduction in levels of organochlorine pesticides. All residues detected were within the FAO/WHO proposed acceptable daily intake

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00392.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Thermal destruction rates for patulin in blackcurrant, blueberries and strawberries and berry jams made of these materials with an addition of 440 g sucrose per kg were tested. Half‐lives were calculated to be 31, 65 and 77 min for unsweetened blackcurrants, blueberries and strawberries. For sweetened berry mixtures the corresponding values were 113, 144 and 112 min, respectivel

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00393.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

During a two week period, several residents of a small Nebraska community experienced violent illnesses with short duration following ingestion of locally grown hydroponic cucumbers (Goes et al. 1979). Approximately a year later during another two week period, a second similar outbreak occurred. In each incident those who ingested hydroponic cucumbers experienced similar illnesses. All of the cucumbers were grown at the same greenhouse. The carbamate insecticide aldicarb, was detected in some cucumbers grown at the hydroponic greenhouse.The aldicarb was determined as aldicarb sulfone (a metabolite) by gas chromatography employing a flame photometric detector (FPD) with a 394 mμ filter selective for sulfur‐containing compounds. Separate calibration curves, derived from aldicarb sulfone, are required for the quantitati

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00394.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Weanling female BALB/c mice were continuously fed diets containing combinations of 12 or 24% protein, 4 or 24% fat and 500 ppm of 2 acetylaminofluorene (2‐AAF) for 78 weeks. Mice on the high fat diets demonstrated a significant increase in the incidence of hepatocellular neoplasms and urinary bladder carcinomas. The incidence of both liver tumors and bladder tumors was reduced in the mice fed low fat and low protein diet compared to the other three diets. The protein levels alone appeared to have no effect on the incidence of bladder tumors or liver tumors. Mice fed the diet with lower levels of fat and protein showed a significant decrease in the incidence of bladder carcinomas compared to the mice fed the higher levels of fat andlor protei

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00395.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Ground beef packaged and stored with carbon dioxide‐generating reagent packets made from (1) microporous plastic film or (2) non‐woven cellulose cloth had significantly (p0.05) in bacterial counts of samples stored with the 2 types of packets. Samples with in‐package generated carbon dioxide atmospheres had approximately 2–3 days additional shelf‐life before

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1980.tb00396.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY