ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 53 (1963), S. 456-459 
    ISSN: 1573-8221
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An inquiry was made into the size of the nuclei and the mitotic activity of the transplantable cellular lines HeLa, Hep-2 and cinomolgus heart (SCH) during prolonged cultivation (for about 40 months). Each of the cultures studied was characterized by a definite size of the nuclei. For 40 months the SCH culture was characterized byconstant morphology, degree of mitotic activity and sensitivity to the action of poliomyelities virus. These data are in favor of a marked stability of the transplantable cellular line. However, in individual cases considerable changes were seen in the morphology and mitotic activity of the same transplantable cellular line, depending on the conditions of cultivations.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 47 (1959), S. 765-770 
    ISSN: 1573-8221
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The authors studied the morphology of the following cells: renal cells ofMacacus rhesus, cardiac cells ofMacacus cinomolgus, and of different lines of malignant HeLa and Hep cells. All these cells were cultured on mica films in the liquid nutrient medium. Although the dynamics of the cytological changes of the cultures were similar, each one of them had certain growth peculiarities reflected in the curves of mitotic activity. In 122 experiments this activity in the renal cells was low. Evidently, the cellular reproduction here occurs by amitosis. Irregular mitoses are encountered in all four cultures as a manifestation, of intensive cellular reproduction. The growth dynamics and morphology of the renal culture vary depending on the cells originating directly from the body or from a subculture. The culture of a cinornolgus heart differs by a number of signs (dynamics of mitotic activity, the shape of the nuclei) from the cultures of malignant cells, with which it has certain morphological similarities.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1573-8906
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1573-8906
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Chemistry of heterocyclic compounds 11 (1975), S. 526-528 
    ISSN: 1573-8353
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract It is shown that polarization of the endocyclic double bond in the electrophilic addition of alcohols and water to 2-formyl-2,5-dialkoxy-2,3-dihydro-γ-pyrans is directed toward the carbon atom in the 6 position.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Chemistry of heterocyclic compounds 12 (1976), S. 1094-1097 
    ISSN: 1573-8353
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conditions of heteropolar and radical thiylation of 2-formyl-2,5-diethoxy-2,3-dihydro-γ-pyrans were studied. Oxidation of the carbonyl group occurs along with the Cannizzaro reaction in the reaction of 2-formyl-2,5-diethoxy-2,3-dihydro-γ-pyran with silver oxide in alkaline media. Oxidation of 2-formyl-2,5-dibutylthio-2,3-dihydro-γ-pyran with silver oxide leads to stable 2,5-dibutylthio-2,3-dihydro-γ-pyran-2-carboxylic acid.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 50 (1961), S. 1307-1312 
    ISSN: 1573-8221
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The authors studied the effect of polio virus upon the morphology of the cells obtained from subculture of the renal tissue (Macacus rhesus), heart (Macacus cynomolgus) and HeLa and HEp-2 malignant cells. The changes become noticeable in individual cells after an 8–12-hour action and are marked in 24 hr. These changes are manifested in the chromatin redistribution, the loss of nuclear membrane turgor, the change of the cellular shape and cytoplasmic eosinophilia. The most sensitive to the action of the virus are the cultures during the initial stages of growth, and the youngest and the most active cells in a given culture. The following changes occur in the cultures of transplantable strains acted upon by the virus: at first decomplexation of the stratum is noted with the formation of roundish cellular accumulations, and only later the changes in the individual cells are seen. Temporary stimulation of mitotic activity is noted in the cells of the transplantable strains on the second day of the viral action
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Es wurde eine Komplexuntersuchung, des Phenotypus der Zellen des stabilen Stammes LHC—162 (spontaner. Abortus) durchgeführt. Der Karyotyp der Zellen dieses Stammes ist 47,XY.+C. Das überzählige Chromosom wurde durch die Giemsa-Methode als C7 identifiziert. Der Karyotyp ist im Verlauf von 62 Passagen stabil geblieben., Die cytomorphologischen, autoradiographischen, immunochemischen Untersuchungen dieses Stammes wurden im Vergleich zu diploiden Stämmen, durchgeführt. Die Zellen dieses Stammes sind nicht krebsauslösend. Die Empfindlichkeit dieses Stammes gegenüber drei Polimyelitis-Virusstämmen ist nicht anders als die Empfindlichkeit des diploiden Stammes. Das Wachstum der Zellen des Stammes LHC—162 ist wenig organisiert; sie besitzen sehr wenig, Fähigkeit, eine histotypische Struktur zu formen; sie bilden wenig Kollagen, sie speichern zu wenig Lipidgranulan; in ihnen ist der Gehalt an Glykogen und die Aktivität von Phosphotasen zu hoch. Die radiographische Untersuchung des Zellcyclus hat gezeigt, daß die Zeit des mitotischen Cyclus der G2-Periode vergrößert ist. Sie ist fast doppelt so lang wie bei dem diploiden Stamm. Bei der immunochemischen Untersuchung wurde entdeckt, daß der Stamm LHC—162 wie die diploiden Stämme Eiweiß-Komponenten in α1- und α2-Globulinzonen synthetisierte, aber der Stamm LHC—162 synthetisiert Eiweiß in der α1-Globulinzone intensiver und Eiweiß in der Globulinzone α2 schwächer als normale Zellen. Die Stabilität der, gefundenen phänotypischen Besonderheiten des Stammes LHC—162 läßt sie charakteristisch für diesen Stamm erscheinen. Diese charakteristische Gesamtheit der phänotypischen Eigenschaften kann man als Äußerung der gestörten Differenzierung der Zellen mit Trisomie C7 betrachten. Möglicherweise gibt es ähnliche “Zellsyndrome” auch für andere Chromosomenanomalien.
    Notes: Summary A complex investigation of the phenotype of a stable strain of LHC—162 cells derived from a spontaneous abortus was carried out. The karyotype, of the strain was 47,XY,+C. The extra chromosome was identified by Giemsa staining as a No. 7. The strain was subjected to cytomorphological, autoradiographic, immunochemical and virological examination in comparison with diploid cell strains. The cells of the LHC—162 strain had no oncogenic activity. Their susceptibility to the three types of poliomyelitis virus did not differ from those of diploid strains. The growth of the LHC—162 cells was poorly organized, and they had a reduced capacity for the formation of histotypical structures. There was low collagen production, poor accumulation of lipid granules, high acid phosphatase, activity, and high glycogen content. Radioautographic investigation of cell cycle revealed lengthening of the mitotic cycle in the G2, period which was twice as long as in diploid strains. Immunochemical investigation showed that fibroblasts of both trisomic and diploid strains synthesized proteins in α1 and α2 globulin zones. However, the synthesis of a protein in α1 zone was considerably more intensive and in α2 zone less intensive in the LHC—162 cells than in the diploid strain. The stability of these phenotypic features make it reasonable to assume that they represent a biological characteristic of the LHC—162 strain. It is suggested that this characteristic totality of phenotypical features can be considered as an expression of the C7 trisomic cell's differentiation confusion. It is suggested that “the cellular syndrome”, is not due only to this chromosomal aberration but also to other chromosomal aberrations.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 26 (1977), S. 1522-1524 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions A number of new 2,5-dialkylthio-2-formyl-2, 3-dihydro-γ-pyrans was synthesized via the Mannich reaction using alkylthioacetaldehydes.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 32 (1983), S. 2381-2383 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Depending on the reaction conditions, the hydrolysis ofβ-ethylthiocrotonaldehyde diethyl acetal leads either toβ-ethylthiocrotonaldehyde or to methylβ-ethylthiovinyl ketone. 2. The 2,4-dinitrophenylhydrazones ofβ-ethylthiocrotonaldehyde and methylβ-ethylthiovinyl ketone when heated in an acid medium are respectively converted to the 5-methyl and 5-methyl derivatives of 1-(2,4-dinitrophenyl)pyrazole.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...