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  • 1
    Electronic Resource
    Electronic Resource
    AFLP fingerprinting and genotypic characterization of some serovars of Bacillus thuringiensis (2000)
    Springer
    World journal of microbiology and biotechnology 16 (2000), S. 667-672 
    Details
    ISSN: 1573-0972
    Keywords: AFLP ; Bacillus thuringiensis ; DNA fingerprinting ; genetic diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Amplified fragment length polymorphism (AFLP)-based fingerprinting of 24 serovars of Bacillus thuringiensis (Bt) representing different serotypes was performed using 13 EcoR1 (+2) and Mse1 (+3) primer combinations for genotypic characterization. A high degree of polymorphism was established among the Bt serovars. A total of 1107 fragments ranging from 30–850 bp were generated out of which 1106 were polymorphic. Discrimination rates of different primer combinations at various band levels (1–5) among different Bt serovars were more than 90%. Cluster analysis revealed very low similarity values, ranging from 7–50%, among the Bt serovars indicating their remarkable genetic diversity. AFLP analysis establishes the molecular relatedness between the serovars and serotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008936127319
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  • 2
    Electronic Resource
    Electronic Resource
    Changes induced by hexachlorocyclohexane isomers in rat liver and testis (1988)
    Springer
    Bulletin of environmental contamination and toxicology 41 (1988), S. 531-539 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02020997
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  • 3
    Electronic Resource
    Electronic Resource
    Toxicity of β- and -γ-hexachlorocyclohexane in rats of different ages (1991)
    Springer
    Bulletin of environmental contamination and toxicology 47 (1991), S. 623-627 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01700955
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  • 4
    Electronic Resource
    Electronic Resource
    Generation and characterisation of monosomic chromosome addition lines of Brassica campestris - B. oxyrrhina (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 976-981 
    Details
    ISSN: 1432-2242
    Keywords: Key words Chromosome addition line ; Synteny group ; Brassica campestris ; Brassica oxyrrhina ; Monosomic ; Alloplasmic ; RAPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Monosomic chromosome addition lines of Brassica oxyrrhina in the background of alloplasmic B. campestris carrying B. oxyrrhina cytoplasm were generated and characterised through morphology, cytology and molecular (RAPD) analysis. Four successive backcrosses of the synthetic alloploid B. oxycamp with B. campestris yielded 24 monosomic addition plants that were grouped into seven different synteny groups based on morphological similarity and RAPD patterns. Each synteny group exhibited morphological features diagnostic for the presence of individual B. oxyrrhina chromosomes including some novel phenotypes. Meiotic studies of the addition lines revealed the homoeology of four B. oxyrrhina chromosomes (synteny groups 1, 3, 5 and 6 ) with B. campestris chromosomes as indicated by trivalent associations, with the highest homoeology (44.23%) in synteny group 1 and the lowest (6.1%) in synteny group 3. Seed fertility of the addition lines ranged from 94.85% (synteny group 1) to 56.98% (synteny group 5). All of the addition lines were male-sterile except synteny group 6 which had 12–16% stainable pollen. Ovule transmission of the B. oxyrrhina chromosomes added to the progenies of addition lines ranged from 23.52% (synteny group 6) to 14% (synteny group 7). RAPD analysis confirmed the validity of synteny grouping based on morphological observations. Approximately 45% of the primers studied were informative, giving B. oxyrrhina-specific RAPD bands unique for each synteny group, except group 6.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050979
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  • 5
    Electronic Resource
    Electronic Resource
    Gel permeation chromatography for characterization of graft copolymer (1980)
    Springer
    Polymer bulletin 2 (1980), S. 321-324 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The present paper describes the grafting of vinyl monomers onto cellulose nitrate in non-aqueous medium using benzoyl peroxide as a catalyst. The complete separation of the homopolymers and graft copolymer was carried out by selective solvent extraction. The graft copolymer was characterized by IR spectra. The GPC was used as a technique to differentiate between homopolymer, polymer mixture, polyblend, and graft copolymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266708
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  • 6
    Electronic Resource
    Electronic Resource
    Block copolymerization initiated by Mn(III)-poly(ethylene glycol) redox system — general features and kinetics (1994)
    Springer
    Colloid & polymer science 272 (1994), S. 777-783 
    Details
    ISSN: 1435-1536
    Keywords: Mn(III)-poly(ethylene glycol) ; acrylonitrile ; block copolymerization ; kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The kinetics and mechanism of thermal polymerization of acrylonitrile initiated by Mn(III) pyrophosphate — poly(ethylene glycol) (PEG, molecular weight 6000) redox system in aqueous sulfuric acid medium was studied in the temperature range 30–60°C. The overall rates of polymerization and the disappearance of Mn3+ were determined. The polymerization was initiated by the organic free radical produced from the Mn3+-PEG reaction and the termination was by the metal ions. The rate of polymerization of acrylonitrile was found to be directly proportional to the square of the monomer concentration and first power of PEG concentration, and inversely proportional to the concentration of Mn3+. The rate of manganic ion disappearance was found to be directly proportional to manganic ion concentration and PEG concentration, and independent of the monomer concentration. Based on these observations, a plausible reaction scheme was suggested and suitable kinetic expressions were evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652418
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  • 7
    Electronic Resource
    Electronic Resource
    Capillary-Constant Correlations for Some New Refrigerants (1998)
    Springer
    International journal of thermophysics 19 (1998), S. 1473-1484 
    Details
    ISSN: 1572-9567
    Keywords: capillary constant ; refrigerants ; surface tension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents a method of evaluating the capillary constant of some new refrigerants, namely HFCs 32, 125, 134, 134a, 143a, and 152a; HCFCs 123, 123a, 124, 141b, and 142b in the liquid-vapor coexistence regions except within 2K from the critical point. The correlation is of the form a 2 =a 0 2 (1-Tr)0.92 where a 0 2 is obtained through the saturated-liquid density data. The calculated results show that the correlation is able to predict experimental data within 4% with a maximum absolute deviation less than 9%. A procedure to calculate the surface tension without the saturated vapor density data is also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021991704406
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  • 8
    Electronic Resource
    Electronic Resource
    Hydrogen permeation during zinc-manganese alloy plating (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 358-363 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrodeposition of metals from solution is usually accompanied by the simultaneous discharge of hydrogen ions or water molecules. When hydrogen is liberated at an iron/steel surface during electrodeposition, a portion of the hydrogen is absorbed by the metal surface and then diffuses into the interior. The diffused hydrogen produces some detrimental effects, such as reduction in ductility and loss in mechanical strength, leading to hydrogen embrittlement. The present paper reports investigations on hydrogen permeation measurements in zinc-manganese alloy deposition using a modified electrode clamp for easy removal and fixing of the electrode. Hydrogen permeation studies indicate that the porosity of the deposit increases in the following order:Zn-Mn(14.3%), Zn-Mn(2.4%), Zn-Mn(24.8%) and Zn-Mn(37.5%).This is in agreement with the corrosion data obtained which indicates that Zn-Mn alloy deposits with low manganese content show better performance than pure zinc deposits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296692
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  • 9
    Electronic Resource
    Electronic Resource
    Structural considerations from dielectric measurements on the aliphatic alcohols (1975)
    Springer
    Journal of solution chemistry 4 (1975), S. 299-310 
    Details
    ISSN: 1572-8927
    Keywords: Dielectric constant ; ethanol ; high pressure ; Kirkwoodg K factors ; liquid association ; methanol ; n-propanol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precise static dielectric constants are reported for methanol, ethanol, andn-propanol at 10,25, and 40° C and at pressures up to 3 kbar. The measurements were carried out by a low-frequency bridge method using a threeterminal, all-glass cell. An uncertainty of 0.05% is claimed for the data. The results are compared to data from previous investigations, whith the agreement in the absolute magnitude poor but the agreement in the pressure coefficient reasonable in most cases. The data are analyzed in terms of the Kirkwood correlation factorg K as obtained from the Fröhlich equation. In all cases, theg K factor decreases with increased pressure. The problems involved in calculating this factor from the experimental data are discussed, and it is shown that the trends ing K are very dependent upon the assumptions made in isolating the liquid dipole moment from its gas-phase value. This fact also indicates that an interpretation of theg K values in terms of stepwise association of correlation dipoles is premature at this time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650388
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  • 10
    Electronic Resource
    Electronic Resource
    The pressure dependence of the dielectric constant and density of acetonitrile at three temperatures (1977)
    Springer
    Journal of solution chemistry 6 (1977), S. 357-367 
    Details
    ISSN: 1572-8927
    Keywords: High pressure ; dielectric constants ; density ; acetonitrile ; temperature dependence ; Kirkwoodg factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The static dielectric constant of liquid acetonitrile is reported at 10, 25, and 40°C and at pressures up to 3 kbar. Densities of pure acetonitrile were measured where needed in order to analyze the dielectric measurements using the Kirkwood-Fröhlich equation. The Kirkwood correlation factorg K was found to be less than unity with a positive temperature but negative pressure coefficient, suggesting an increasing anticorrelation of dipoles with decreased temperature and increased pressure. Theg K factors are analyzed by a dipole pair-bonding model as outlined by Dannhauser and Flueckinger in which the lowg K values are attributed to the presence of dimers consisting of completely anticorrelated dipoles. The implication of this model on other measurements, especially MNR relaxation studies, is examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647050
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