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  • 1
    Electronic Resource
    Electronic Resource
    Cationic and Anionic Effects on the Glass Transition Temperature for Aqueous Electrolyte Solutions (1999)
    Springer
    Journal of solution chemistry 28 (1999), S. 1127-1136 
    Details
    ISSN: 1572-8927
    Keywords: Alkali metal acetate ; alkali metal trifluoroacetate ; Et4NX solution ; glass-forming composition region ; glass transition temperature ; cationic effect ; anionic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Glass-forming composition regions of aqueous CH3COOM (M = Li, Na, K, Rb, Cs, and Tl), CF3COOM (M = Li, Na, K, Rb, and Cs), and Et4NX (Et4 = C2H5, X = OH, CH3COO, Cl, Br, NO3, and SCN) solutions are reported as a function of water concentration R (R = moles of water per moles of salt). Glass transition temperatures (T g) were measured by a simple differential thermal analysis (DTA) method with a cooling rate of about 600 K-min−1. The T g of all solutions decrease with increasing R (decreasing salt concentration). It is found that T g at the same R value decrease in the order Na+ 〉 Li+ 〉 K+ 〉 Rb+ 〉 Cs+ in all glass-forming composition regions of the alkali acetate salt and alkali trifluoroacetate salt solutions. T g for Et4NX solutions decrease in the order CH3COO− ~OH− 〉 Cl− 〉 Br− 〉 NO 3 − 〉 SCN−. The effects of the cation and anion on the glass-forming behavior in these aqueous solutions are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021751608253
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  • 2
    Electronic Resource
    Electronic Resource
    Cell cycle-dependent expression of the mouseRad51 gene in proliferating cells (1996)
    Springer
    Molecular genetics and genomics 251 (1996), S. 1-12 
    Details
    ISSN: 1617-4623
    Keywords: DNA repair ; DNA replication ; Homologous recombination ; Meiosis ; RecA gene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The mouseRad51 gene is a mammalian homologue of theEscherichia coli recA and yeastRAD51 genes, both of which are involved in homologous recombination and DNA repair in mitosis and meiosis. The expression of mouseRad51 mRNA was examined in synchronized mouse m5S cells. TheRad51 transcript was observed from late G1 phase through to M phase. During the period of late G1-S-G2, the RAD51 proteins were observed exclusively in nuclei. Activation by mitogens of T cell and B cell proliferation in spleen induced the expression ofRad51 mRNA. By immunohistochemical analyses, the mouse RAD51 protein was detected in proliferating cells: spermatogonia in testis, immature T cells in thymus, germinal center cells of the secondary lymphatic nodules of spleen and intestine, follicle cells in ovary and epithelial cells in uterus and intestine. It was also expressed in spermatocytes during early and mid-prophase of meiosis and in resting oocytes before maturation. Thus, mouseRad51 expression is closely related to the state of cell proliferation and is presumably involved in DNA repair coupled with DNA replication, as well as in meiotic DNA recombination in spermatocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02174338
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    Paper (German National Licenses)
    Fulltext
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