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  • 1
    Electronic Resource
    Electronic Resource
    Degradation studies on Escherichia coli capsular polysaccharides by bacteriophages (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 153 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The serologically and structurally related Escherichia coli capsular polysaccharides (K antigens) K13, K20, and K23 were found to be depolymerized by the bacteriophages ΦK13 and ΦK20 to almost similar oligomer profiles as shown by polyacrylamide gel electrophoresis. The phage-polysaccharide interactions were followed by an increase of reducing 2-keto-3-deoxyoctulosonic acid due to a phage-associated glycanase that catalyzed the hydrolytic cleavage of common β-ketopyranosidic 2-keto-3-deoxyoctulosonic acid linkages. The related E. coli K antigens K18, K22, and K100 as well as the Haemophilus influenzae type b capsular polysaccharide were degraded by bacteriophage ΦK100 with different efficacy. It is suggested that ΦK100 enzymatically cleaves ribitol-5-phosphate bonds as the only structural feature present in all the polysaccharides investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb10470.x
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  • 2
    Electronic Resource
    Electronic Resource
    Two different Escherichia coli capsular polysaccharide depolymerases each associated with one of the coliphage φK5 and φK20 (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 82 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: The Escherichia coli capsular polysaccharides (K antigens) K5 and K20 are known as primary receptors for the coliphage φK5 and φK20, respectively. A host range study of the phage revealed that E. coli K5 strains were not only lysed by φK5 but also by φK20, and furthermore that the E. coli K95 test strain was attacked by φK5 in addition to K5 strains. In order to find out whether the phage can degrade the K antigens, the interaction of the phage with isolated polysacharides was studied. It could be demonstrated that φK5 was able to depolymerize the K5 and K95 polysaccharides and that φK20 showed degrading activity towards the antigens K20 and K5. Obviously, each of the phages was associated with two different enzyme systems which enabled them to recognize and depolymerize chemically unrelated polysaccharides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04854.x
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  • 3
    Electronic Resource
    Electronic Resource
    Aerobactin production and dulcitol fermentation in clonal groups of Escherichia coli O1: K1 strains from urinary tract infections (1988)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 49 (1988), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract 70 urinary Escherichia coli O1:K1 strains were characterized for O1 antigen factors, mannose-resistant hemagglutination of human erythrocytes, flagellar and fimbrial antigens, dulcitol fermentation and aerobactin production. On the basis of their O1 and H antigens the strains could be assigned to 6 distinct groups. The most prevalent groups were: O1abcd: H− :F9 (33 strains; pattern II), O1abc: H− :F11 (9 strains; pattern IV), and O1abc: H7: F11 (19 strains; pattern V). Strains with patterns IV and V, both expressing fimbrial antigen F11, fermented dulcitol and produced aerobactin, whereas strains with pattern II were negative for both characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1988.tb02782.x
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  • 4
    Electronic Resource
    Electronic Resource
    Detection of rough Escherichia coli K1 strains using K1 specific phages (1981)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 10 (1981), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1981.tb06270.x
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Isolierung und qualitativen Bausteinanalyse der K-Antigene von Klebsiellen (1968)
    Springer
    Medical microbiology and immunology 154 (1968), S. 117-131 
    Details
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Kapselantigene der Klebsiella-Typen K1–K72 wurden mit Phenol/Wasser extrahiert und mit Hilfe von Cetavlon gereinigt. Die qualitative Bausteinanalyse hat ergeben, daß die K-Antigene der Klebsiellen saure Heteropolysaccharide sind, an deren Aufbau sieben verschiedene Monosaccharide beteiligt sind. In den meisten Fällen stellt Glucuronsäure die saure Komponente dar. Galacturonsäure tritt viel seltener auf. Außer einer Hexuronsäure enthalten die K-Antigene mindestens zwei weitere Bausteine (Hexosen, 6-Desoxyhexosen). Es wurden verschiedene Zuckerbaustein-Kombinationen beobachtet. Einige kommen sogar mehrfach vor, wobei die qualitativ gleiche Zusammensetzung der K-Antigene nicht mit serologischer Identität einhergeht.
    Notes: Summary The capsular antigens of Klebsiella types 1–72 were obtained by extraction with phenol/water followed by cetavlon purification. The K antigens were found to be acidic heteropolysaccharides consisting of seven different monosaccharide constituents when analysed by comparative paper chromatography. Mostly glucuronic acid represents the acidic component. Galacturonic acid was found to be present only in six antigens. The capsular polysaccharides contain at least two other sugars in addition. Various combinations of monosaccharides were observed. Some of these have the same qualitative sugar composition but differ with respect to their serological specificity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02123700
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  • 6
    Electronic Resource
    Electronic Resource
    Biochemical characteristics, phage patterns, and O1 factor analysis ofEscherichia coli O1∶K1∶H7∶F11 and O1∶K1∶H−∶F9 strains isolated from patients with urinary tract infections (1984)
    Springer
    Medical microbiology and immunology 173 (1984), S. 75-85 
    Details
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Biochemical characteristics, O1 antigen factors and phage patterns were examined in 35 urinary O1∶K1 isolates ofEscherichia coli different in H and F antigen. Fermentation of dulcitol, decarboxylation of ornithine, requirement for nicotinamide, and determination of O1 factor d allowed maximum differentiation. On the basis of these tests the strains could be divided into two major groups which are obviously of different clonal origin. Members of clone 1 represented by serotypes O1∶K1∶H7∶F11 (12 strains) and O1∶K1∶H−∶F11 (5 strains) were characterized by positive biochemical reactions and absence of O1 antigen factor d. Negative biochemical tests and presence of O1 antigen factor d were shown by strains of clone 2 which were of serotypes O1∶K1∶H−∶F9 (14 strains) and O1∶K1∶H−∶F− (3 strains). Phage patterns are less well correlated with clonal assignment. However, strains of clone 2 were not susceptible to K1-specific phage D and were non-typable with another set of 13 phages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02124821
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  • 7
    Electronic Resource
    Electronic Resource
    Benzazole. XV. MANNICH-Basen des Benzthiazolons (1961)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 14 (1961), S. 150-157 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: MANNICH-Basen sekundärer aliphatischer und primärer aromatischer Amine werden dargestellt. Der Bildungsmechanismus wird diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19610140307
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  • 8
    Electronic Resource
    Electronic Resource
    Benzazole. XIV. Alkylierung, Acylierung und Hydroxymethylierung des Benzthiazolons (1961)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 14 (1961), S. 139-149 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Benzthiazolon bildet bei der Umsetzung mit Alkylhalogeniden, Acetanhydrid, Benzoylchlorid, Alkyl- und Arylsulfonylchloriden sowie mit Formaldehyd ausschließlich Derivate der Lactam-Form (N-Substitution). Beim Methylieren mit Diazomethan in Äther entsteht N-Methyl- neben O-Methyl-benzthiazolon. Aus diesem Ergebnis darf nicht auf das Vorliegen einer Lactam-Lactim-Tautomerie des Benzthiazolons geschlossen werden. Der Mechanismus für die Diazomethanreaktion wird diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19610140306
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  • 9
    Electronic Resource
    Electronic Resource
    Derivate der Zucker-mercaptale, V. Benzoate und p-Nitrobenzoate von Aldosen und Aldose-Mercaptalen (1957)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 90 (1957), S. 500-515 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Aldose-mercaptale lassen sich allgemein mit Benzoyl- oder p-Nitrobenzoylchlorid in Pyridin zu den Monoacyl-aldose-mercaptalen partiell acylieren. Mit einem Überschuß an Säurechloriden gewinnt man die voll acylierten Aldose-mercaptale. Nach verbesserten Verfahren werden durch Abspalten von Mercaptan mit Quecksilber(II)-chlorid aus den Monoacyl-aldose-mercaptalen die Monoacyl-aldosen und aus den voll benzoylierten Aldose-mercaptalen die Benzoyal-al-zucker gewonnen. Aus den Benzoyl-aldose-mercaptalen erhält man durch Behandeln mit Acetanhydrid und Schwefelsäure die 1.1- Diacetylbenzoyl-aldosen, die sich partiell zu den Benzoyl-al-zuckern verseifen lassen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19570900408
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  • 10
    Electronic Resource
    Electronic Resource
    Benzthiazolonyl-(3)-carbonsäuren (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 27 (1965), S. 220-224 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Darstellung von Benzthiazolonyl-(3)-essigsäure, -propionsäure und -buttersäure sowie einige ihrer Derivate beschrieben, die in ihrem Effekt auf Mikroorganismen geprüft werden sollen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650270312
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