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Changes in the cell wall of Clostridium species following passage in animals (1986)

Brook, I. ; Cole, R. ; Walker, R. I.

Springer

Antonie van Leeuwenhoek 52 (1986), S. 273-280

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ISSN: 1572-9699

Keywords: Clostridium perfringens ; Clostridium difficile ; Clostridium butyricum ; abscess ; cell wall

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Morphological changes in clostridial isolates after animal passage with other flora in mixed infections were studied by utilizing a subcutaneous abscess model in mice. We used 26 isolates of 7 clostridial species, and one isolate each of Bacteroides fragilis and Klebsiella pneumoniae. Abscesses were induced by all 7 Clostridium perfringens and 3 Clostridium butyricum isolates and by some of the other isolates. A thick granular wall prior to animal inoculation was shown only in C. perfringens, C. butyricum, and C. difficile. This structure was observed in other clostridia only following their animal passage alone or when co-inoculated with K. pneumoniae or B. fragilis.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00428639

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Optimal bounds for bilinear forms associated with linear equations (1985)

Mika, J. ; Pack, D. C. ; Cole, R. J. ; [et al.]

Chichester, West Sussex : Wiley-Blackwell

Mathematical Methods in the Applied Sciences 7 (1985), S. 518-531

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ISSN: 0170-4214

Keywords: Mathematics and Statistics ; Applied Mathematics

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics

Notes: The construction of upper and lower bounds to the bilinear quantity g0, f, where f is the solution of an operator equation Tf = f0, requires either an approximation for f or one for T-1. In this paper the question of “best” approximation of T-1 by an operator of the form B = βI, where β is a real constant, is investigated for linear operators that are either self-adjoint or can be related by suitable manipulations to others that are. Particular attention is paid to a special operator, previously studied by Robinson, of importance in predicting the dynamic polarisabilities of quantum-mechanical systems.