ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00783.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

DFMO reduced mycelial growth of the ectomycorrhizal fungusPaxillus involutus. This was accompanied by reduced activities of ornithine decarboxylase, S‐adenosylmethionine decarboxylase and diamine oxidase, and unchanged polyamine oxidase activity. Although DFMO treatment did not alter putrescine or spermidine concentrations significantly, spermine concentration was substantially reduce

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00784.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Beauveria bassiana, Metarhizium anisopliaeandPaecilomyces farinosuswere grown on Sabouraud Dextrose Agar (SDA) modified with KCl to give a range of water activity (aw) from 0.938 to 0.998. Growth of all three species was optimal at 0.983 awand growth occurred over the awrange tested. Acyclic sugar alcohol (polyol) and trehalose content of conidia was determined by HPLC and found to vary with species and aw. Conidia ofB. bassianaandP. farinosuswere found to contain totals of 1.5% and 2.3% polyols respectively at 0.998 aw, and double these amounts at<0.950 aw. Conidia ofM. anisopliaecontained from 5.7% to 6.8% polyols at each awtested. In conidia of all three species the predominant polyol was mannitol. The lower molecular weight polyols, arabitol and erythritol, were found to accumulate at reduced aw. Small amounts of glycerol were present in conidia of each species;<15% total polyols. Conidia ofB. bassianaandM. anisopliaecontained about 0.5% trehalose from 0.970 to 0.998 aw, but only trace amounts below 0.950 aw. Conidia ofP. farinosuscontained 2.1% trehalose at 0.998 awand this decreased to<0.1% below 0.950 aw. Potential to manipulate the endogenous reserves of conidia of these biological control agents to enhance viability and desiccation toierance is discussed

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00785.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The disappearance of bacteria through grazing was studied. Five allochthonous and eight autochthonous bacterial strains, and the bacterioplankton of the Butrón River were tested. There were differences in the susceptibility of different strains. These differences seemed to be related to intrinsic characteristics of the bacteria rather than to their origin

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00786.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Five hundred naturally contaminated samples were examined in a trial where SMID agar was compared with either Brilliant Green agar, Rambach agar or Xylose, Lysine, Desoxycholate agar. There were no significant differences in sensitivity but SMID agar detected slightly more salmonella isolates than BGA agar following RVS enrichment and slightly less following Selenite enrichment. There was, however, a marked reduction in the level of false‐positives when SMID agar was use

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00787.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Almost 750Pseudomonasstrains from meat, fish, milk or plant were screened for inhibitory potential towards 10 selectedPseudomonas fragiisolated from meat. Only strains of fish origin and a referencePs. putidastrain produced an inhibitory substance which was either a siderophore or a bacteriocin‐like substance. The two systems were efficient in meat extract medium suggesting potential use for controlling meat qualit

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00788.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Inflation and changes in the poultry industry in Jamaica have necessitated an increased understanding of spoilage flora and the examination of methods for increasing the shelf life of chilled eviscerated poultry. The efficacy of five antibiotics was determined. Despite the widespread use of neooxytetracycline in the treatment of poultry infections, tetracycline concentrations of<10 μg ml‐1were found to be highly effective against isolates of the main spoilage organismPseudomon

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00789.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

A sulphated derivative of paramylon, a water‐insoluble (1–3)‐β‐D‐glucan fromEuglena gracilis, inhibited the cytopathic effect of human immunodeficiency virus (HIV‐1) on cultured MT‐4 cells as efficiently as dextran sulphate. A computer‐assisted three‐dimensional graphing technique revealed that paramylon sulphate and 3′‐azido‐2′, 3′‐dideoxythymidine (AZT) synergistic

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00790.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Wistar rats fed 5%‐mannitol diet showed significant decreases of viridans streptococci and bifidobacteria, and a remarkable increase of butyric acid concentration and a decrease of acetic acid in the caecal contents compared with the sucrose and basal diet groups. Stocky fusiform bacteria were increased in concentration in the rats on mannitol compared with the other group

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00791.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Protoplasts from the hydroiase enzyme producerAspergillus awamoriwere isolated using Bulgarian enzyme preparations—Trichocease‐SU and Xylanase. Among the regenerated colonies from protoplasts two were selected with enhanced productivity of xylanase, endoglucanase and β‐glucosidase. The endoglucanase produced by the parent and one of the regenerants differ in their absorptivity, sensitivity to product inhibition and heat sta

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1994.tb00792.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY