ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Structure of prudomestin (1992)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 1090-1092 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270191013823
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Stabilities of some bivalent transition metal ions with 2-hydroxy naphthaldehyde semicarbazones and thiosemicarbazones in dioxane-water mixtures: A potentiometric study (1992)
    Springer
    Monatshefte für Chemie 123 (1992), S. 1099-1105 
    Details
    ISSN: 1434-4475
    Keywords: Bivalent metal ion ; 2-hydroxy-1-naphthaldehyde derivatives ; formation constant ; potentiometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden die Gleichgewichte zwischen 2-Hydroxynaphthaldehyd-Semicarbazonen und -Thiosemicarbazonen einerseits und Proton oder zweiwertigen Übergangsmetallionen andererseits potentiometrisch bei einer konstanten Ionenstärke und verschiedenen Zusammensetzungen von Dioxan und Wasser als gemischtem Lösungsmittel untersucht. Die Methode von Bjerrum und Calvin nach der Modifikation von Irving und Rossotti wurde zur Evaluierung der Werte fürn undpL verwendet. Die Stabilitätskonstanten und β n -Werte wurden nach Sullivan et al. berechnet. Die WerteS min=χ2 wurden ebenfalls bestimmt. Die Reihenfolge der Stabilitätskonstanten war UO 2 2+ 〉 Cu2+ 〉 Ni2+ 〉 Co2+ 〉 Zn2+ 〉 Pb2+ 〉 Cd2+ 〉 Mn2+ 〉 Mg2+. Außerdem wurde der Effekt wechselnder Dielektrizitätskonstanten des Lösungsmittels auf die Stabilitätskonstanten der Komplexe bei einer Ionenstärke von 0.100M NaClO4 und einer Temperature von 20±0.5°C untersucht.
    Notes: Summary Equilibria between 2-hydroxy naphthaldehyde derivatives (semicarbazone and thiosemicarbazone) and proton or some bivalent metal ions have been investigated potentiometrically at a constant ionic strength and different compositions of the mixed solvent (dioxane: water). The method of Bjerrum and Calvin [1, 2], as modified by Irving and Rossotti [3], has been used to determine the values ofn andpL. The stability constants have been calculated following Sullivan et al. [4] to give β n values. The values ofS min=χ2 have also been calculated. The order of stability constants was found to be found to be UO 2 2+ 〉 Cu2+ 〉 Ni2+ 〉 Co2+ 〉 Zn2+ 〉 Pb2+ 〉 Cd2+ 〉 Mn2+ 〉 Mg2+. The effect of varying the dielectric constant of the medium on the stability constants of the complexes has also been investigated at an ionic strength of 0.100M NaClO4 and a temperature of 20±0.5°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808272
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Stabilities of mixed metal complexes with biologically active colchiceine in dioxan-water and their relation to quantitative softness values: A new approach (1994)
    Springer
    Monatshefte für Chemie 125 (1994), S. 267-274 
    Details
    ISSN: 1434-4475
    Keywords: Stability ; Mixed metal complexes ; Colchiceine ; quantitative softness values
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden Gleichgewichte zwischen Kolchicein und Protonen oder bivalenten Metallionen potentiometrisch untersucht. Zur Berechnung der Werte fürn undpL wurde die Methode von Bjerrum und Calvin in der Modifikation von Irving und Rossotti genutzt, die Stabilitätskonstanten wurden mit NBAR und kleinsten-Fehlerquadrat-Methoden ermittelt. Die Werte fürS min=χ2 wurden ebenfalls berechnet. Die Reihung nach Stabilitätskonstanten ergab sich als: Zn 〈 Cu 〉 Ni 〉 Co 〉 Cd 〉 Mn 〉 Mg und für die gemischten Metallkomplexe: Cu-Ni 〉 Cu-Zn 〉 Cu-Cd. Es wurde eine lineare Beziehung zwischen logK 1 und den Weichheitswerten der Komplexe beobachtet.
    Notes: Summary Equilibria between colchiceine and protons or bivalent metal ions and mixed metal ions have been investigated potentiometrically. The method of Bjerrum and Calvin, as modified by Irving and Rossotti [1] has been used to find the values ofn andpL. Stability constants have been calculated using NBAR and weighted least-squares programmes. The values ofS min=χ2 have also been calculated. The order of stability constants for bivalent metal complexes was found to be: Zn 〈 Cu 〉 Ni 〉 Co 〉 Cd 〉 Mn 〉 Mg and for mixed metal complexes: Cu-Ni 〉 Cu-Zn 〉 Cu-Cd. A linear relationship was observed between logK 1 and the softness values of the complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811312
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Thermal and magnetic studies of mixed ligand complexes of chromium(III) containing dithiocarbamate and acetylacetone/oxine/glycine moieties (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 2541-2554 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden Chrom(III)-komplexe des Typs Cr(A)(A′)2, Cr(A)2(A′) und Cr(A)3 (wobei A entweder Piperidyldithiocarbamat oder Morpholyldithiocarbamat und A′ Glycin, Oxin oder Acetylaceton ist) hergestellt. Die Mischligandenkomplexe wurden mit tels Elementaranalyse, Messungen der magnetischen Suszeptibilität und durch thermische Untersuchungen beschrieben. Die Komplexe weisen ein magnetisches Moment im Bereich 3.5–4.3 B.M. auf, was drei ungepaarten Elektronen entspricht. Es wurden auch TG-Unter suchungen durchgeführt, um die Art und Weise der Zersetzung der Komplexe zu untersuchen und verschiedene kinetische Parameter zu bestimmen.
    Notes: Abstract Chromium(III) complexes of the type Cr(A)(A′)2, Cr(A)2(A′) and Cr(A)3 have been prepared (whereA is either piperidyldithiocarbamate or morpholyldithiocarbamate andA′ is glycine or oxine or acetylacetone moiety). The mixed ligand complexes have been charac terized by elemental analyses, magnetic susceptibility measurements and thermal studies. The complexes show magnetic moment in the range of 3.5–4.3 B.M. which corresponds to three unpaired electrons. TG studies have also been carried out, in order to study the mode of decomposition of the complexes and to evaluate various kinetic parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01912799
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Variations among races of Arabidopsis thaliana (L.) heynh for survival in limited carbon dioxide (1979)
    Springer
    Theoretical and applied genetics 54 (1979), S. 11-15 
    Details
    ISSN: 1432-2242
    Keywords: Photosynthetic efficiency ; Transgressive segregation ; CO2 compensation point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Races of a C3 plant species, Arabidopsis thaliana, were screened for time of survival when enclosed in an air-tight chamber with a C4 plant species (Zea mays L.). This has been suggested as a method of detecting and selecting for increased photosynthetic efficiency among C3 genotypes. The C4 plant should, in such conditions, reduce the atmospheric CO2 concentration below the compensation point of the C3 plant, resulting in its eventual death. Significant differences were found among the A. thaliana races for survival time; some races survived only one week in competition with corn while others survived more than two weeks. Two races, chosen for contrasting survival in closed chambers, were hybridized and compared to their F2 progeny for survival time. Substantial genetic segregation occurred among the F2, and a number of transgressive segregates having survival times superior of both parents were identified. Also significant heterosis was observed in the F2 population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265702
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Nylon 6-Fasern: Änderung der Struktur bei mittleren und hohen Dehnungsverhältnissen (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 759-759 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01643854
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Fiber-fiber coefficient of friction: Effects of modulus and tan δ (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 173-184 
    Details
    ISSN: 0021-8995
    Keywords: 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 technologically important studies on rubber friction and wear give strong support to rubber friction being a viscoelastic phenomenon. However, the basic concepts and conclusions derived from such studies appear to have general validity. Fiber-to-fiber friction studies are carried out on a number of polymeric flaments with a view to establishing the relationships between fundamental mechanical properties such as modulus, tan δ, and the coefficient of friction. The relationship between these three quantities is expressed by an equation. The results show that with these fibers adhesive contribution to friction is negligible and that temperature and humidity variations in end uses have a much more important effect in frictional properties than changes in draw ratio, heat setting, and so on.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070230116
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Studies on glutamic-oxalacetic (GOT) and glutamic-pyruvic (GPT) transaminases of swine kidney worm Stephanurus dentatus (Diesing, 1839) (1977)
    Springer
    Parasitology research 54 (1977), S. 251-256 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Biochemical studies on the two transaminases GOT and GPT of swine kidney worm Stephanurus dentatus have been made. GOT has been found much more active than GPT. Enzyme activities are based on the formation of oxaloacetate (GOT) or pyruvate (GPT) from aspartic acid and alanine respectively with oxoglutarate. A linear relationship is observed between the enzyme concentration and activity. GOT shows a maximum activity at pH 8.0 and Michaelis constant 9×10−3 M for male and 2.9×10−3 M for female. GPT has an optimum pH of 7.5 and a Michaelis constant 19×10−3 M for male and 8×10−3 M for female. The optimum temperature for both GOT and GPT was 60° C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390116
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Biochemical and histochemical studies on non-specific phosphomonoesterases of swine kidney worm Stephanurus dentatus (Diesing, 1839) (1976)
    Springer
    Parasitology research 49 (1976), S. 187-192 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Biochemical and histochemical studies have been made on non-specific acid and alkaline phosphomonoesterases of S. dentatus. The two forms of acid phosphomonoesterases have been found active at pH 4.0 and 6.0. The pH optima for the two forms of alkaline phosphomonoesterases lie at 8.0 and 10.0. Studies on the distribution of acid and alkaline phosphomonoesterases in various tissues have revealed an abundance of acid phosphomonoesterase in various parts of the alimentary canal and various organs of the reproductive system. The excretory ducts show alkaline phosphomonoesterase activity only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382426
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Structure and properties of Nylon 6 and PET fibres: the effects of crystallite dimensions (1977)
    Springer
    Journal of materials science 12 (1977), S. 2310-2328 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Analyses of mechanical and diffusive properties of fibres are described indicating strong lateral interactions between the microfibrils. These results show that uniaxially oriented polymers must be analysed in terms of a model where the crystallites are imbedded in an “amorphous” matrix. The equations are derived for modulus, strength and coefficient of diffusion in terms of crystallite dimensions, and the results compared with the experimental data. These results contradict the predictions of the microfibrils model where the properties are independent of the crystallite dimensions but depend solely on the degree of crystallinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552253
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...