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| 1. |
The relevance of linear regression for assessing the performance of microbiological counting techniques |
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Letters in Applied Microbiology,
Volume 7,
Issue 1,
1988,
Page 1-4
Margaret Sacree,
D.C. Kilsby,
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摘要:
The usefulness of an automated or rapid microbiological method to count bacteria is normally assessed by comparison of the method's results with those obtained using a standard plating technique to produce a linear relationship between the two measurements. If the correlation coefficient obtained for this regression is high, then the resulting regression line is often used as a calibration curve for counting. Such an approach can fail to identify imprecisions in the counting techniques especially when the calibration curve is derived over a large counting range. The problems encountered are illustrated by reference to results using a conductance method, and an alternative experimental approach towards assessing the performance of such techniques is proposed.
ISSN:0266-8254
DOI:10.1111/j.1472-765X.1988.tb01239.x
出版商:Blackwell Publishing Ltd
年代:1988
数据来源: WILEY
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| 2. |
The nature of the substance in acidic streptococcal extracts reacting with fibrinogen |
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Letters in Applied Microbiology,
Volume 7,
Issue 1,
1988,
Page 5-7
H.J. Rylance,
R.C. Wallace,
W. Marr,
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摘要:
Acid extracts from streptococci were shown to react with fibrinogen and synovial fluid. The reactive material was a teichoic acid and not M‐protein as previously suggested and is of high molecular weight and akin to polyglycerophosphat
ISSN:0266-8254
DOI:10.1111/j.1472-765X.1988.tb01240.x
出版商:Blackwell Publishing Ltd
年代:1988
数据来源: WILEY
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| 3. |
Inhibitory effects of aflatoxin Bl on amylase of maize seed |
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Letters in Applied Microbiology,
Volume 7,
Issue 1,
1988,
Page 9-11
Dilip Chatterjee,
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摘要:
The reason for aflatoxin B1‐induced non‐germination of maize seed was investigated. It was observed that aflatoxin Bl (AFB1), produced by invadingAspergillus flavus.Link in seed, affects amylase activity, causing inhibition of starch (major food reserve) hydrolysis and consequent unavailability of sucrose (utilizable substrate) to the embryonic axis during the period of imbibation. The embryo of a toxin contaminated seed, nevertheless remains alive possessing fairly high dehydrogenase (respiratory) activity and is capable of growth in culture when supplemented with sucr
ISSN:0266-8254
DOI:10.1111/j.1472-765X.1988.tb01241.x
出版商:Blackwell Publishing Ltd
年代:1988
数据来源: WILEY
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| 4. |
Studies on pre‐incubation conditions in the seeded agar plate well inhibition assay |
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Letters in Applied Microbiology,
Volume 7,
Issue 1,
1988,
Page 13-15
R.J.P. Cannell,
M. Knowles,
J.M. Walker,
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摘要:
Pre‐incubation at 4°C increases the zone of bacterial growth inhibition produced by methanolic extracts of freshwater algae in the agar diffusion assay. Preloading of wells with methanol increases the inhibition zone produced by water‐insoluble antibio
ISSN:0266-8254
DOI:10.1111/j.1472-765X.1988.tb01242.x
出版商:Blackwell Publishing Ltd
年代:1988
数据来源: WILEY
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| 5. |
An improved selective and diagnostic medium for isolation and counting of Listeria spp. in heavily contaminated foods |
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Letters in Applied Microbiology,
Volume 7,
Issue 1,
1988,
Page 17-21
P. van Netten,
I. Perales,
D.A.A. Mossel,
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PDF (262KB)
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摘要:
Columbia agar base containing 0·001% acriflavine, 1·5% lithium chloride, 0·25% phenyl ethanol, 0·05% aesculin. 0·05% ferrous salt, 1% mannitol, 2·5% egg yolk emulsion and 0·008% phenol red (ALPAMY), recoveredListeria monocytogenesand some strains ofListeria seeligeriquantitatively, but suppressedListeria ivanoviiand virtually all other bacteria common in fresh foods. When used with foods processed for safety, repair on non‐selective buffered glucose tryptone soya peptone yeast extract catalase agar must precede the use o
ISSN:0266-8254
DOI:10.1111/j.1472-765X.1988.tb01243.x
出版商:Blackwell Publishing Ltd
年代:1988
数据来源: WILEY
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