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  • 1
    Electronic Resource
    Electronic Resource
    Über die Löslichkeit von PVC in Weichmachern (1973)
    Springer
    Colloid & polymer science 251 (1973), S. 5-16 
    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
    Notes: Zusammenfassung Mittels der mikroskopischen Untersuchungsmethode wird die Lösetemperatur von PVC in Dioctylphthalat in Abhängigkeit vom Molekulargewicht und der Vorbehandlung der Proben bestimmt. Bei technischen Produkten wird ein Anstieg der Lösetemperatur mit dem Molekulargewicht gefunden, wobei das Suspensions-polymerisat eine höhere Lösetemperatur zeigt, als dem Molekulargewicht entsprechen würde. Umfällen der technischen Produkte verwischt diesen Unterschied sowie den Einfluß des Molekulargewichtes. An Fraktionen wird ein Minimum der Lösetemperatur bei mittleren Molekulargewichten gefunden. Maßnahmen, die bei kristallisierenden Polymeren die Kristallinität erhöhen (Tempern, Quellungskristallisation), führen zum Ansteigen der Lösetemperaturen. Die gewonnenen Ergebnisse werden mit der Annahme gedeutet, daß neben dem Molekulargewicht auch der Ordnungsgrad von entscheidendem Einfluß auf die Höhe der Auflösungstemperatur von PVC in Weichmachern ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01501414
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Non-LTR retrotransposons with unique integration preferences downstream of Dictyostelium discoideum tRNA genes (1999)
    Springer
    Molecular genetics and genomics 262 (1999), S. 772-780 
    Details
    ISSN: 1617-4623
    Keywords: Key wordsDictyostelium ; tRNA gene ; Retrotransposon ; Genome evolution ; Dictyostelium Genome Project
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Retrotransposable elements are genetic entities which move and replicate within host cell genomes. We have previously reported on the structures and genomic distributions of two non-long terminal repeat (non-LTR) retrotransposons, DRE and Tdd-3, in the eukaryotic microorganism Dictyostelium discoideum. DRE elements are found inserted upstream, and Tdd-3 elements downstream, of transfer RNA (tRNA) genes with remarkable position and orientation specificities. The data set currently available from the Dictyostelium Genome Project led to the characterisation of two repetitive DNA elements which are related to the D. discoideum non-LTR retrotransposon Tdd-3 in both their structural properties and genomic distributions. It appears from our data that in the D. discoideum genome tRNA genes are major targets for the insertion of mobilised non-LTR retrotransposons. This may be interpreted as the consequence of a process of coevolution, allowing a viable population of retroelements to transpose without being deleterious to the small microbial host genome which carries only short intergenic DNA sequences. A new nomenclature is introduced to designate all tRNA gene-targeted non-LTR retrotransposons (TREs) in the D. discoideum genome. TREs inserted 5′ and 3′ of tRNA genes are named TRE5 and TRE3, respectively. According to this nomenclature DRE and Tdd-3 are renamed TRE5-A and TRE3-A, respectively. The new retroelements described in this study are named TRE3-B (formerly RED) and TRE3-C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380051140
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  • 3
    Electronic Resource
    Electronic Resource
    Sample size and retention values in gradient liquid chromatography of synthetic polymers (1996)
    Springer
    Chromatographia 42 (1996), S. 185-190 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Gradient elution of synthetic polymers ; Polystyrene and various styrene copolymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Retention times in gradient liquid chromatography of synthetic polymers are often dependent on sample size. They increase with column load if the separation mechanism is governed by a solution process but decrease with increasing load if the mechanism is governed by adsorption. Since retention times independent of sample size are a prerequisite for peak identification as well as for the correct measurement of elution bands of samples with a broad distribution, measures to counteract sample-size effects deserve attention. Usually both solubility and adsorption are effective in gradient liquid chromatography of synthetic polymers. An appropriate balance of both effects is suitable for diminishing the influence of sample size on retention time of synthetic polymers. Ternary gradients allowing independent control of solubility and adsorption are promising.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269651
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  • 4
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    Sample size and retention values in gradient liquid chromatography of synthetic polymers (1996)
    Springer
    Details
    Publication Date: 1996-02-01
    Print ISSN: 0009-5893
    Electronic ISSN: 1612-1112
    Topics: Chemistry and Pharmacology
    Published by Springer
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  • 5
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    Über die Löslichkeit von PVC in Weichmachern (1973)
    Springer
    Details
    Publication Date: 1973-01-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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