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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 3920-3922 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Light scattering in a thin film of a mixture of dielectric and magnetic fluids has been studied under both electric and magnetic fields. The film can transmit visible light in no electric field. When an electric field is applied across the film, the transmittance decreases rapidly. The phenomenon is explained by Rayleigh scattering due to the dielectric clusters formed under the field. The decay time to return to the transmittance at no electric field after switching off the field is much larger than the response time after switching on the field; however, the usage of a magnetic as well as an electric field allows the decay time to be shortened.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 2528-2529 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fresh surfaces of polycrystalline Al-49.2%Cu, Al, and In are fabricated in duffusion pump oil, and observed in situ using a scanning tunneling microscope. The current images reflect the atomic arrays on their surfaces. More clear images with atomic resolution are observable about 10 h later compared with those just after the fabrication. Atomic resolution images are observable in oil several days after, with increasing noise.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 31 (1990), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In a serum-free culture containing no zinc, zinc enhanced the proliferation of T cells in response to interleukin 2 (lL-2), and also the in vitro production of lL-2 by T cells. Although the lymphocyte proliferation was partially inhibited by anti-IL-2 antibodies, it was completely inhibited by anti-IL-2 receptor (CD25) antibodies. A Scatchard plot analysis showed that zinc induced the expression of high-affinity receptors for IL-2 on lymphocytes. The results indicated that zinc may be essentially required for IL-2-mediated T-cell activation.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary We report two patients who developed benign plasmacytosis with multiple skin lesions. The cases were characterized by hyperplasia of mature plasma cells, and polyclonal hypergammaglobulinaemia. One patient had hyperplasia of mature plasma cells not only in the skin, but also extensively in lymph nodes and the retroperitoneal areas around the ureters. The other had plasma cell hyperplasia limited to the skin. Extensive investigations failed to reveal any clinical or laboratory evidence suggesting the presence of any underlying disease accompanying the hypergammaglobulinaemia and/or plasma cell proliferation, such as chronic infectious disease, collagen disease or other chronic inflammatory disorder. Clinically and histologically, the first patient showed features compatible with a diagnosis of systemic plasmacytosis and the second with a diagnosis of cutaneous plasmacytosis. Significant serum interleukin-6 (IL-6) levels were detected in both patients, suggesting that IL-6 may be involved in the pathogenesis of these conditions.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 14 (1990), S. 261-267 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Cette étude a été entreprise afin de préciser le devenir du cartilage articulaire dans les greffes d'une hémi-articulation implantées après conservation par congélation en deux temps. L'antigènicité a été évaluée quantitativement d'après les réponses immunologiques humorale et cellulaire: il n'en a pas été noté dans les greffes de cartilage allogène. Dans les transplantations hémi-articulaires, il n'y a pas lieu de se préoccuper de l'antigènicité du cartilage, seule celle de l'os, cortical et spongieux, doit être diminuée. Histologiquement, les greffes hémiarticulaires conservées à −196° sont supérieures aux allogreffes fraiches. La congélation en deux temps semble donc utilisable pour la conservation du cartilage articulaire.
    Notes: Summary This study was undertaken to examine the fate of articular cartilage in isogenic half-joint grafts implanted after storage by two-stage freezing. The antigenicity was evaluated quantitatively with regard to humoral and cellular immunological responses: none was seen in allogenic cartilage grafts. In the half-joint transplantations, the antigenicity of the cartilage need not be considered; only the antigenicity of cortical and cancellous bone must be reduced. Histologically, half-joint grafts stored at −196°C were superior to fresh allografts. Two-stage freezing, therefore, appears to be useful for the storage of articular cartilage.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 14 (1990), S. 243-248 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Cette étude expérimentale a été entreprise chez la souris pour apprécier les procédés de stockage de l'os spongieux allogène. Les greffes spongieuses ont été conservées à −80° C, à −196° C ou lyophilisées. Elles ont été implantées dans une cavité du fémur receveur et, au bout d'une semaine, l'activité cellulaire cinétique a été analysée par autoradiographie. Pour l'étude immunologique les greffes ont été implantées dans le muscle du receveur et sept semaines plus tard leurs propriétés sensibilisatrices ont été évaluées par la toxicité sur les lymphocytes T-killer et le test de cytotoxicité dépendant du complément. La capacité ostéogénique des greffes réfrigérées à −196° C était égale ou supérieure à celle des greffes lyophilisées, mais elle était faible quand elles étaient conservées à −80° C. L'immunogénicité n'était pas affectée par ces trois méthodes de conservation et était très analogue à celle des autogreffes fraîches. L'antigénicité des allogreffes peut être réduite par la lyophilisation. Nous pensons que le potentiel ostéogénique, supérieur après refroidissement à −196° C est lié au moindre degré de dégénérescence de la matrice osseuse.
    Notes: Summary This experimental study was undertaken in mice to investigate the procedures for storage of allogenic cancellous bone. Cancellous grafts were were stored at −80° C, −196° C or freeze dried. Grafts were implanted into a defect in the recipient's femur and after one week the cellular kinetic activity was analysed by autoradiography. For immunological study, the grafts were implanted into the recipient's muscle, and 2 weeks later the sensitising properties were examined by killer T-cell toxicity and the complement dependent cytotoxicity test. The capacity for osteogenesis of grafts frozen at −196° C was similar to or higher than those freeze dried, but it was low when storage was at −80° C. Immunogenicity was not affected by these three methods of storage and was very similar to that of fresh autografts. Antigenicity of allografts can be decreased by the freezing procedure. We suggest that the greater osteogenic potency after freezing at 196° C is related to the lesser degree of degeneration of the bone matrix.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The incorporation of [1-14C]acetate and [214 C]mevalonate into free and esterified triterpen-3-ols was examined in original plant organs and tissue cultures of Glycyrrhiza glabra var. glandulifera. Both substrates labeled β-amyrin, an oleanane-type triterpene, and cycloartenol and 24-methylenecycloartanol, both of which are intermediates of phytosterol biosynthesis. The label in esterified triterpenes was distributed mainly in phytosterol intermediates, but not in β-amyrin. The ratio of βamyrin formation among the three triterpenes from [2-14C]mevalonate was relatively high in stolon segments and in root cultures, but negligible in callus cultures. Administration of a specific inhibitor of squalene-2, 3-epoxide:cycloartenol (lanosterol) cyclase caused a marked increase of β-amyrin synthesis in root suspension cultures, and of 24-methylenecycloartanol synthesis in cell suspension cultures, from [2-14C]mevalonate.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Osteoporosis international 3 (1993), S. 69-69 
    ISSN: 1433-2965
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 1494-1496 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 372 (1994), S. 532-534 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The compound Sr2RuO4 has been known for quite some time2. It is the n = 1 member of the homologous series expressed as Sr/7+1Ru/?O3/;+1, of which those members with "=1,2 and oo have been synthesized2'3. Single crystals of Sr2RuO4 used in the present study were grown in air by ...
    Type of Medium: Electronic Resource
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