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  • 1
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 434 (1984), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 71 (1968), S. 102-104 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Some polysaccharides isolated from lichens significantly inhibited the growth of implanted sarcoma-180 in mice and caused complete tumour regression in many cases.
    Notes: Zusammenfassung Einige Polysaccharide, die aus Flechten isoliert wurden, hemmen das Wachstum des Sarkoms-180 in Mäusen und verursachen in vielen Fällen vollständige Regression der Tumoren.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 84 (1975), S. 193-202 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein mit Methylnitrosoharnstoff erzeugter Hirntumor (Ependymom) bei einer BD-Ratte wurde in vitro kultiviert. Es wuchsen sowohl Firoblasten als auch sternförmige gliaähnliche Zellen. Reimplantation dieser Zellen in das Gehirn einer anderen BD-Ratte führte zu Tumorwachstum in den weichen Häuten. Diese Geschwulst wurde intracerebral über mehrere Passagen verimpft. Obwohl dieser Transplantationstumor morphologisch einem Sarkom ähnlich war, konnten durch Silberimprägnation Gliazellen angefärbt werden. Eine aus der ersten Transplantationsgeneration in vitro abgeleitete Zellinie enthielt S-100 Protein in Spuren. In-vitro explantierte Zellen des mit Methylnitrosoharnstoff erzeugten Primärtumors wurden kloniert. Zwei Klone, RGL 1 und RGL 2, bestanden aus Zellen, die morphologisch den sternförmigen Elementen des Primärexplantates glichen. Der Klon RGL 1 enthielt S-100 Protein. In der 16. Passage wurde er erneut kloniert; von vier Unterklonen enthielt lediglich einer S-100 in Spuren. Dieser Klon besaß einen subdiploiden Karyotyp mit 39 Chromosomen, zusätzlich ein submetazentrisches Markerchromosom. Zwei Subklone von RGL 2 aus der 25. Passage besaßen 41 Chromosomen.
    Notes: summary An ependymoma was induced in the brain of a BD-IX rat by repeated doses of MNU. In vitro grown cells of the tumor were fibroblasts and stellate cells considered to be glial. Reimplantation of these cells into the brain of another BD-IX rat resulted a tumor growing in the meninges. This tumor was then repeatedly transplanted over several passages. Its gross morphology resembled that of a sarcoma; however, glial in cells could be demonstrated with silver methods. A cell line derived from the first transplanted tumor group proved to contain S-100 protein in traces in the first passages in vitro. Explanted cells of the primary ependymoma were cloned. Two clones were established, RGL 1 and RGL 2. The cells of both clones resembled morphologically the stellate elements of the primary explant. RGL 1 contained S-100 protein. It was cloned again in the 16th subpassage. Four clones were established. Only 1 contained S-100 protein in traces. The clone RGL 1 had a subdiploid karyotype with a modal number of 39 and a large submetacentric marker. It was subcloned in the 25th passage with two clones, both having a karyotype of 41 chromosomes.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 2793-2797 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 350-352 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Three different space groups, C2/c, C2 and Cc, have been reported for the room-temperature form of the rare-earth orthoniobates, LnNbO4 (Ln = La, Nd). They belong to different point groups: 2/m, 2 and m, respectively. By means of convergent-beam electron diffraction, the point group has been determined to be 2/m in the present study. Therefore the true space group must be C2/c.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 825-837 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Tables of dynamic extinction lines which occur in convergent-beam electron diffraction patterns (GM lines) are given for all the space groups on the basis of the rules given by Gjønnes & Moodie [Acta Cryst. (1965), 19, 65-67]. It is found that 191 space groups can be identified by GM lines. A convenient experimental method which distinguishes a screw axis and a glide plane is demonstrated. Experimental results are shown in which the GM lines due to a screw axis and those due to a glide plane are separately observed. The GM lines appearing in a symmetrical four-beam pattern are demonstrated.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 143-151 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Many-beam lattice images obtained at 200 kV from V2O3 crystals are discussed in comparison with those calculated in the Bloch-wave approach. The technique of optical diffractogram and equal-thickness fringes is utilized, if possible, to determine the defocus value and the crystal thickness which are the essential parameters for objective interpretation at atomic resolution. Whereas images observed in a thin region (∼ 50 Å) of crystal have been reproduced fairly well by simulation, there are others from thicker regions which are not always explained for lack of knowledge of the parameters. As for the effect of the partial coherence, the validity of the envelope-function approximation is examined with the aid of the first principle involving image-intensity summation, and under the experimental conditions used it proved to be satisfactory for qualitatively reproducing the observed image even for relatively thick (∼ 450 Å) regions.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 721-721 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Tables 13 and 17 of the paper by Tanaka, Sekii & Nagasawa [Acta Cryst. (1983), A39, 825-837] are not perfect. The correct tables are given.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 1033-1041 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Lattice images of high-temperature-phase vanadium sesquioxide (V2O3) were calculated within the Bloch-wave approach. At an accelerating voltage of 1000 kV the structure image can be produced while at 100 kV it cannot be obtained because of the small number of reflections available in the image formation, which demonstrates clearly an advantage of high voltages which are produced by improvement in the transfer condition of the objective lens. On the other hand, if an ideal phase-contrast lens is assumed in order to obtain the structure image at 100 kV, lattice-image calculations can be carried out with modified unit-cell size. The results show that the maximum allowable thickness to obtain the structure image varies more rapidly than in a linear manner with the required resolution. The maximum allowable thickness increases either with higher voltages (from about 20 Å at 100 kV to about 35 Å at 1000 kV) or with larger unit cells (e.g. a dilatation of 25% in unit-cell size increases the maximum thickness from about 20 to about 35 Å). However, the evolution of the image details as a function of crystal thickness is different for these two factors, due to the different dynamical interactions of electron waves.
    Type of Medium: Electronic Resource
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