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  • 1
    Electronic Resource
    Electronic Resource
    The role of meteorological factors in determining the annual variation ofAlternaria andCladosporium spores in the atmosphere of Palencia, 1990–1992 (1996)
    Springer
    International journal of biometeorology 39 (1996), S. 139-142 
    Details
    ISSN: 1432-1254
    Keywords: Alternaria ; Cladosporium ; Airborne spores ; Correlations ; Meteorological factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract A study was made of the daily content ofAlternaria andCladosporium spores in the atmosphere in Palencia city (Spain) for three consecutive years 1990–1992.Alternaria andCladosporium represented 55% of the total identified spores, presenting an annual distributional pattern of which the maximum values were reached in summer. Multiple regression analyses showed a positive correlation between minimum temperature andCladosporium spore concentrations, while forAlternaria there was a positive correlation with maximum temperature and a negative correlation with precipitation. Duncan's multiple range test among means ofAlternaria data indicated that winds coming from a northeasterly direction were associated with significantly higher concentrations the spores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01211226
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Aerobiological study of fungal spores from Palencia (Spain) (1996)
    Springer
    Aerobiologia 12 (1996), S. 27-35 
    Details
    ISSN: 1573-3025
    Keywords: Aerobiology ; Aeromycology ; Spores ; Fungi ; Meteorological factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A study of the concentration of fungal spores has been carried out in the atmosphere of Palencia town (NW Spain) during 1992. The volumetric method of filtration has been used. Half of the daily filter sample has been cultivated in Czapecdox-agar or Sabouraud-agar for the identification of fungal colonies, and the other half has been examined by optical microscopy. Several colonies belonging to 26 genera have been identified. Deuteromycetes (54%) and Zigomycetes (28%) are assembled in four genera, and Bacteria and Actynomycetes (18%) in three genera. The greatest concentrations occur forAspergillus (23%),Mucor (25%), followed byPenicillium (16%). The greatest diversity and abundance of fungal spores are found in September–December. The viable colonies are more abundant in Czapedox-agar culture, whereas Bacteria were more frequently found in Sabouraud medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02248120
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Serotypes of CNF1-producingEscherichia coli strains that cause extraintestinal infections in humans (1994)
    Springer
    European journal of epidemiology 10 (1994), S. 707-711 
    Details
    ISSN: 1573-7284
    Keywords: NecrotoxigenicEscherichia coli ; Pathogenicity ; Toxins ; Virulence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The O:K:H serotypes of 137 necrotoxigenicEscherichia coli (NTEC) producing the cytotoxic necrotizing factor type 1 (CNF1) isolated from human extraintestinal infection were determined. Although NTEC producing CNF1 belonged to 58 different serotypes, only 10 of them accounted for 54% of strains. The most common serotypes, in order of frequency, were: O4:K?:H5, O6:K13:H1, O83:K1:H31, O75:K95:H5, O2:K1:H6, O2:K7:H-, O75:K1:H7, O2:K?:H1, O4:K12:H1 and O22:K13:H1. CNF1 strains of serotypes O2:K7:H- and O4:K12:H1 express P-fimbriae, whereas CNF1 strains of serotypes O2:K?:H1, O2:K1:H6 and O75:K95:H5 possess the adhesin responsible for MRHA type III. Among CNF1 strains of serotype O4:K?:H5 there exist some that express P-fimbriae and others that possess MRHA type III. Lastly, the majority of CNF1 strains of serotypes O6:K13:H1, O22:K13:H1, O75:K1:H7 and O83:K1:H31 do not express P-fimbriae nor the adhesin responsible to MRHA type III. Our results show that extraintestinal infections are caused by a limited number of virulent clones, as suggested by the theory of special pathogenicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01719286
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  • 4
    Electronic Resource
    Electronic Resource
    Serotypes and colonization factors of enterotoxigenic Escherichia coli isolated in various countries (1993)
    Springer
    European journal of epidemiology 9 (1993), S. 489-496 
    Details
    ISSN: 1573-7284
    Keywords: Diarrhoea ; E. coli ; Enteropathogens ; Enterotoxins ; Virulence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract One hundred and six enterotoxigenic E. coli (ETEC) isolated from many geographical areas were serotyped and investigated for the presence of colonization factor antigens CFA/I and CFA/II, the expression of mannose-resistant haemagglutination (MRHA) and the levels of surface hydrophobicity. CFA/I was found in 6 (17%) of 36 LT+STa+ strains and in 15 (54%) of 28 STa+ strains; CFA/II was found in 16 (44%) of 36 LT+STa+ strains. None of 42 LT+ strains showed CFA/I or CFA/II. CFA/I was found in ETEC of serotypes O63:K−:H−, O78:K80, O128:K67 and O153:K−:H45, whereas CFA/II was found in serotypes O6:H−, O6:K15:H16 and 06:K?:H40. Of the 69 CFA/I− CFA/II− ETEC strains, 9 (13%) showed MRHA with some of the seven erythrocyte species used and 21 (30%) were hydrophobic. Among the 21 hydrophobic strains CFA-negative we have detected: (i) 6 LT+ strains of serogroup O25 negative for MRHA, (ii) 5 strains O159 (4 LT+ and 1 LT+ STa+) also negative for MRHA, and (iii) 3 STa+ strains of serotype O27:K−:H7 that haemagglutinated calf and sheep erythrocytes when grown on Minca-Is. The 106 ETEC strains belonged to 20 different 0 serogroups. However, 77 (73%) were of one of nine serogroups (O6, O8, O25, O27, O78, O148, O153, O159 and O167). E. coli strains belonging to O6 and O153 groups predominated among ETEC isolated in Spain, O159 strains in the Central African Republic, O25 and O148 strains in Japan, and O15 and O78 strains in India.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00209526
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Preferential interactions of poly(N-vinyl-2-pyrrolidone) in the binary mixture water/CdCl2 (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 36 (1995), S. 345-351 
    Details
    ISSN: 0959-8103
    Keywords: viscometry ; densimetry ; unperturbed dimensions ; preferential interactions ; poly(N-vinyl-2-pyrrolidone) ; CdCl2 ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The poly(N-vinyl-2-pyrrolidone)(PVP)(2)/water(1)/CdCl2(3) ternary system has been studied by viscometry, densimetry and atomic absorption spectrophotometry. In this system a preferential adsorption of Cd2+ at all solvent compositions studied and a conformational transition at 4mM of salt, the concentration at which a preferential adsorption minimum of Cd2+ in exhibited, are observed. The PVP/Cd2+ bound molar ratio is 0·23. CdCl2 behaves as a salting-in agent for the macromolecule. The binary solvent mixture is thermodynamically more favourable at salt concentrations greater than 10 mM of CdCl2.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1995.210360407
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  • 6
    Electronic Resource
    Electronic Resource
    Viscosity behaviour of poly(ethyl methacrylate) in the ethyl acetate/tert-butanol binary mixture: total and preferential adsorption (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 41 (1996), S. 59-65 
    Details
    ISSN: 0959-8103
    Keywords: preferential adsorption ; total adsorption ; unperturbed dimensions ; poly(ethyl methacrylate) ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The behaviour of poly(ethyl methacrylate) (PEMA) in the ethyl acetate (1)/tert-butanol (2) binary mixture is studied by laser light scattering, differential refractometry and viscometry. Ethyl acetate is a solvent for the polymer and tert-butanol is a precipitant. Preferential adsorption of tert-butanol up to 15% alcohol in the binary mixture is observed, ethyl acetate being preferentially adsorbed in the macromolecular coil at higher percentage of alcohol in the solvent mixture. Total adsorption of PEMA is independent of the amount of tert-butanol in the solvent. Various theoretical expressions for the preferential and total adsorption coefficients are used; their agreement or disagreement with the experimental results is explained on the basis of polymer-solvent interactions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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