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  • 1
    Digitale Medien
    Digitale Medien
    Calcium regulating activity of 26,27-dimethyl analog of 24R,25-dihydroxyvitamin D3 (1994)
    Springer
    Calcified tissue international 55 (1994), S. 190-197 
    Details
    ISSN: 1432-0827
    Schlagwort(e): Bone resorption ; Osteoclast-like cell formation ; Bone Ca mobilization ; Intestinal Ca transport ; 24R,25-dihydroxy-26,27-dimethylvitamin D3
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Abstract To determine the possibility that methyl substitution in 26- and 27-positions of 24R,25-dihydroxyvitamin D3 [24,25(OH)2D3] alters activities of the original compound, the effects of 24,25(OH)2D3 on calcium (Ca) regulating activity were compared with those of its methyl analog [24,25(OH)2(CH3)2D3] in addition to 1α,25-dihydroxyvitamin D3 [1,25(OH)2D3]. 24,25(OH)2D3 at 10-6 M and 24,25(OH)2(CH3)2D3 at 10-7 M and above significantly stimulated both bone resorption in neonatal mouse calvaria cultures and formation of osteoclast-like multinucleated cells (MNC) in mouse bone marrow cultures. A stimulative effect of 1,25(OH)2D3 on bone resorption and MNC formation was recognized in very low concentrations (10-11 M and above). Although a potency of 24,25(OH)2(CH3)2D3 in stimulating bone calcium (Ca) mobilization and intestinal Ca transport was higher than that of 24,25(OH)2D3, the potencies of both compounds were similar to that of 1,25(OH)2D3 unlike in vitro experiments. As 1,24R,25-trihydroxy-26,27-dimethylvitamin D3 showed almost the same effect as 24,25(OH)2(CH3)2D3, the dihydroxy form is suggested to be hydroxylated at 1α position and converted to trihydroxy form in vitamin D-deficient rats. From these results, methyl substitution in 26- and 27-position of 24,25(OH)2D3 was found to elevate Ca regulating activity of the original compound. In addition, it is suggested that the basis for a similarity in potency between 1,25(OH)2D3 and 24,25(OH)2D3 or its dimethyl analog in vitamin D-deficient rats is likely the result of 1 α-hydroxylation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00425874
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  • 2
    Digitale Medien
    Digitale Medien
    A family of selective immunodeficiency with normal immunoglobulins: possible autosomal dominant inheritance (1994)
    Springer
    European journal of pediatrics 153 (1994), S. 328-332 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Key words: Specific antibody deficiency – Autosomal dominant TSST-1 – Toxic shock syndrome – Staphylococcal infection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract. We report here our findings in two Japanese siblings who experienced recurrent bacterial and viral infections since early infancy. Recent symptoms included diarrhoea, conjunctivitis, rashes, headache, sore throat, joint pain, vomiting and vertigo, all similar to those seen in toxic shock syndrome, except for shock. These symptoms improved following gammaglobulin treatment. Staphylococcus aureus with coagulase type IV was continuously isolated from nasal smears producing toxic shock syndrome toxin-1 (TSST-1). Serum antibodies did not or only poorly responded to TSST-1, diphtheria toxoid, varicella virus and rubella virus, whereas total and subclass levels of serum immunoglobulin and in vitro DNA synthesis of lymphocytes stimulated by TSST-1, Staph. aureus, varicella vaccine and mitogens were normal. In the family, ten other members in three generations (five males : five females) including the mother had similar clinical symptoms. Thus, the disease may be inherited in an autosomal dominant fashion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01956412
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  • 3
    Digitale Medien
    Digitale Medien
    A family of selective immunodeficiency with normal immunoglobulins: possible autosomal dominant inheritance (1994)
    Springer
    European journal of pediatrics 153 (1994), S. 328-332 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Specific antibody deficiency ; Autosomal dominant ; TSST-1 ; Toxic shock syndrome ; Staphylococcal infection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We report here our findings in two Japanese siblings who experienced recurrent bacterial and viral infections since early infancy. Recent symptoms included diarrhoea, conjunctivitis, rashes, headache, sore throat, joint pain, vomiting and vertigo, all similar to those seen in toxic shock syndrome, except for shock. These symptoms improved following gammaglobulin treatment.Staphylococcus aureus with coagulase type IV was continuously isolated from nasal smears producing toxic shock syndrome toxin-1 (TSST-1). Serum antibodies did not or only poorly responded to TSST-1, diphtheria toxoid, varicella virus and rubella virus, whereas total and subclass levels of serum immunoglobulin and in vitro DNA synthesis of lymphocytes stimulated by TSST-1,Staph. aureus, varicella vaccine and mitogens were normal. In the family, ten other members in three generations (five males: five females) including the mother had similar clinical symptoms. Thus, the disease may be inherited in an autosomal dominant fashion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01956412
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Successive determinations of210PB,210PO,226RA,228RA and selected actinides in seawater and sea sediment (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 138 (1990), S. 321-330 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Plutonium 239,240 was measured using large-volume water samples from the North Pacific and its adjacent seas. The vertical profiles of239,240Pu show features that are similar to those reported in earlier papers with a subsurface maxima of around 660 m and a significant concentration increase in the North Pacific bottom waters. It became evident that the239,240Pu concentration in deep bottom water is proportional to the inventory of the nuclides in the overlying water column and that the appearent distribution ratios of the nuclides between deep-sea sediment and bottom water lie in a relatively narrow range of about 2×104 to 105, independent of sea area and warter depth. The latter implies that239,240Pu may follow a reversible-type partition process at a deep water/sediment interface. In order to substantiate this assumption, it is desirable to study the phenomenon for Pu as well as for other long-lived radionuclides, both artificial and natural. From this point of view, an analytical procedure for the successive determination of selected long-lived radionuclides was studied.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02039855
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