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  • 1
    Electronic Resource
    Electronic Resource
    Finding causes of outliers in multivariate environmental data (1991)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 5 (1991), S. 241-248 
    Details
    ISSN: 0886-9383
    Keywords: Multivariate kurtosis ; Generalized distance ; Multivariate outliers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Multivariate outliers in environmental data sets are often caused by atypical measurement error in a single variable. From a quality assurance perspective it is important to identify these variables efficiently so that corrective actions may be performed. We demonstrate a procedure for using two multivariate tests to identify which variable ‘caused’ each outlier. The procedure is tested with simulated data sets have have the same correlation structure as selected water chemistry variables from a survey of lakes in the Western United States. The success rates are evaluated for three of the variables for sample sizes of 50 and 100, significance levels of 0.01 and 0.05 and various amounts of mean shift. The procedure works best for highly correlated variables.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180050311
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Control of an Escherichia coli mixed culture via affinity binding (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 380-388 
    Details
    ISSN: 0006-3592
    Keywords: control ; mixed culture ; adhesion ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A chemostat with population specific recycle was employed to alter the dynamics of a competitive mixed culture of Escherichia coli. Based on differential expression of a functional maltoporin, the two populations were separated by specific adhesion on starch-Sepharose. The slower growing population was the recycled to the reactor. The specific recycle was successful in maintaining the slower growing population at a high level than in comparable reactors without recycle.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380408
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fat body changes in a locust, Chortoicetes terminifera (Walker) (Orthoptera: Acrididae), parasitized by a nemestrinid fly (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Archives of Insect Biochemistry and Physiology 17 (1991), S. 53-63 
    Details
    ISSN: 0739-4462
    Keywords: Trichopsidea oestracea ; host-parasitoid relations ; fatty acid ; Chemistry ; Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The fat body of Chortoicetes terminifera (Walker) (Orthoptera: Acrididae) parasitized by Trichopsidea oestracea (Westwood) (Diptera: Nemestrinidae) was hypertrophied and showed extensive cytological and functional changes. Lipid content (as a percentage of dry weight) was significantly higher in parasitized locusts. Regression of lipid content against parasitoid weight was quadratic in female hosts and linear (negative) in male hosts. The fatty acid composition of C. terminifera was not affected by parasitization. Parasitized male locusts had lower body weight than nonparasitized males and contained less soluble protein. Results indicated that egg development was inhibited in parasitized female locusts. These conditions may be related to changes in the host's fat body.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/arch.940170107
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    Paper (German National Licenses)
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