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  • 1980-1984  (13)
  • 1970-1974  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Naphthothiophenes. 1. .alpha.-(Alkylaminomethyl)-4-naphtho[2,1-b]thiophenemethanols as antimalarials (1972)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 15 (1972), S. 370-374 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00274a010
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaporation and solution morphologies of ZnO single crystals (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 379-383 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The evaporation and solution morphologies of ZnO single crystals have been investigated. In the case of solution etching, using HCl, the {00.1} surface develops etch pits with sharp rims while for the {00.\overline 1} surface, etch-pit rims are unstable. Similar effects are found for evaporation near 1035°C. As the evaporation temperature is increased to near 1200°C, however, the {00.\overline 1} surface becomes increasingly complex before assuming a more stable habit at still higher temperatures. Both {10.\overline 2} and {11.\overline 2} planes are developed on the {00.\overline 1} surface, but the corresponding planes on the {00.1} surface are not observed. (The development of second order pyramidal planes is also observed in vapor grown needles from ore-processing furnaces).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889871007246
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Enhanced frequency of chromosome aberrations in lymphocytes of male compared with female muntjacs after X-ray irradiation in vitro (1981)
    [s.l.] : Nature Publishing Group
    Nature 290 (1981), S. 604-607 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We prepared lymphocyte cultures from healthy, young adult muntjacs (Muntiacus muntjak) selected from a small breeding colony which we maintained. The specimens were chosen so that we could do experiments on blood samples of three pairs of muntjacs of similar age and body weight. This barking deer ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/290604a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    131I-RIHSA CSF scanning in pediatric neurosurgical practice (1974)
    Springer
    Neuroradiology 8 (1974), S. 119-123 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs ont étudié 60 cas de cisternographies à la RISA avec/ou ventriculographies chez des enfants âgés de un mois à 15 ans, atteints de différents troubles de la circulation du LCR. Cette étude comprenait des cas d'hydrocéphalie et d'autres malformations congénitales du système nerveux central ainsi que des séquelles post-traumatiques et post-méningitiques. L'examen se révéla fiable, non seulement dans la différenciation entre hydrocéphalie compensée ou progressive mais également dans la détection d'anomalies associées de la circulation de LCR en cas de méningo-myélocèles d'encéphalocèles. Cette technique est excellente pour la localisation d'une fistule de LCR; elle peut également visualiser la taille et l'extension d'un hématome sous-dural ou d'un hydrome. La concentration pathologique et l'élimination tardive du radio-élément dans la région sous-jacente à la lacune crânienne étaient constantes dans tous les cas de lacunes post-traumatiques. Des blocages uniques ou multiples furent observés dans des cas de séquelles postméningitiques (tuberculose).
    Abstract: Zusammenfassung Bei 60 Kindern im Alter swischen 1 Monat und 15 Jahren wurde die RIHSA-Cisternographie und/oder Ventrikulographie durchgeführt. Es sollten damit unterschiedliche Hydrocephalus-Formen und andere angeborene Mißbildungen des Zentralnervensystems, auch posttraumatische und postmeningitische Veränderungen nachgewiesen werden. Diese Untersuchungsmethode zeigt sich besonders wertvoll zur Differenzierung der einzelnen Hydrocephalus-Arten zum Nachweis von Anomalien der Liquorzirkulation, besonders bei Meningomyelozelen und Encephalozelen. Auch können Liquorfisteln und subdurale Hämatome oder Hygrome damit exakt festgestellt werden. Pathologische Veränderungen finden sich auch bei allen Patienten mit wachsenden Frakturen. Bei postmeningitischen (tuberkulösen) Verklebungen konnte der Stopp lokalisiert werden.
    Notes: Summary Sixty children aged between one month and fifteen years were submitted to RIHSA cisternography and/or ventriculography for a variety of lesions affecting the CSF pathways. These included cases of hydrocephalus and other congenital malformations of the central nervous system, posttraumatic and post meningitic sequelae. The investigation has been found to be valuable not only in differentiating between arrested and progressive hydrocephalus but also in unmasking associated anomalies of CSF flow and pathways in cases of meningomyelocele and encephalocele. It is excellent for delineating a CSF fistula and can also be utilised to demonstrate the size and extent of a subdural hematoma or hygroma. Pathological concentration and delayed clearance of the isotope in the region underlying the skull defect was a consistent finding in all cases of growing fracture (craniocerebral erosion). Single or multiple sites of blocks were observed in cases of postmeningitic (tuberculous) sequelae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345044
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Reduced frequency of baseline sister chromatid exchanges in lymphocytes grown in antibiotics and serum-excluded culture medium (1983)
    Springer
    Human genetics 〈Berlin〉 64 (1983), S. 249-253 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Peripheral venous blood from man, muntjac, and cattle were grown in medium (1) containing different serum (human AB+/FCS/autologous), (2) without serum or antibiotics (penicillin and streptomycin), or (3) without both serum and antibiotics to investigate to what extent certain essential culture components used in in vitro mammalian cell cultures affect the incidence of spontaneous sister chromatid exchanges (SCEs). The observation that exclusion of only serum from culture medium enhanced the frequency of SCEs whereas exclusion of both serum and antibiotics, which influence the cell cycle kinetics to a great extent, exhibited the lowest frequency of SCEs reported so far for lymphocyte cultures, indicates that the frequency of so-called spontaneous SCEs usually observed in normal lymphocyte cultures grown in medium supplemented with serum and antibiotics is in fact an elevated frequency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279403
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  • 6
    Electronic Resource
    Electronic Resource
    High prevalence of Haemoglobin E in two populations in Assam (1971)
    Springer
    Human genetics 〈Berlin〉 12 (1971), S. 264-266 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Zwei Bevölkerungsgruppen in Assam (Indien) wurden untersucht. Bei 80 Khasi (Bhoi-Untergruppe), einem austroasiatischen Stamm, fanden sich 41% HbE-Träger, bei 82 Ahom, Abkömmlingen von Thai-Einwanderern, 58% HbE-Träger. Die große Häufigkeit des HbE in Gruppen mit ethnischen Beziehungen zu Südostasien unterstützen die Ansicht, daß das HbE-Gen von dort nach Indien eingeführt wurde.
    Notes: Summary Two groups in Assam (India) were examined. Among 80 Khasi (Bhoi subgroup), an austroasiatic tribal group, there were 41% HbE carriers; and in 82 Ahom, a group related to the Thai population, 58% of HbE carriers were found. This high prevalence of HbE in groups with ethnic relations to Southeast Asia supports the contention that the HbE gene was introduced to India from that area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702780
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  • 7
    Electronic Resource
    Electronic Resource
    Very low temperature properties of bosons with repulsive core and attractive tails (1973)
    Springer
    Czechoslovak journal of physics 23 (1973), S. 1159-1171 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The properties of a system of bosons interacting through a two body potential composed of a hard repulsive core followed by an attractive square well and having density of the order of that of liquid4He at theλ-point have been studied. The system is found to have a peculiar behaviour around 1 K and we assert that it may have undergone another phase transition around 1 K. Calculations on the effective mass show that them */m values lie between 2 and 9 so that the interacting bosons may have a transition temperature below 1 K. We have also plottedE k vs.k graph for temperatures below 1 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01591197
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of transition metal ion impurities on the thermoluminescence of alumina (1980)
    Springer
    Journal of materials science 15 (1980), S. 515-516 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396803
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  • 9
    Electronic Resource
    Electronic Resource
    A study of the oxidation kinetics of CuFeO2 in the Cu-Fe-O system (1981)
    Springer
    Journal of materials science 16 (1981), S. 102-110 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The oxidation kinetics of CuFeO2 in the Cu-Fe-O system have been studied between 500 and 900° C in an atmosphere containing 1 vol% oxygen in a nitrogen stream using thermogravimetric analysis (TGA). It was found that addition of Fe2O3 to the CuFeO2 caused a decrease in the oxidation rate while addition of CuO caused an increase. On increasing the concentration of Fe2O3 the activation energy was found to increase from ~ 18 kcal mol−1 to ~ 45 kcal mol−1 and the exponent ‘n’ in Avrami's equationf=1-exp (−kt n) was also observed to increase, from 1.3 to 2.3. On adding CuO to the CuFeO2 in the Cu-Fe-O system the activation energy decreased from ~ 18 kcal mol−1 to ~ 8 kcal mol−1. The variation in both values indicates changes in the oxidation mechanisms. The microstructural changes associated with oxidation have been studied using optical microscopy. A model has been proposed to explain the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552064
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  • 10
    Electronic Resource
    Electronic Resource
    Electrical conduction in titania-doped lanthanum chromite ceramics (1981)
    Springer
    Journal of materials science 16 (1981), S. 1994-1998 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The direct and alternating current electrical conductivities of lanthanum chromite ceramic doped with 1 to 3 wt% TiO2 have been measured at temperatures from 20 to 200° C. The sample containing 3 wt% TiO2 has been studied in detail because of all the samples it showed the highest sintered density and electrical conductivity. Alternating current conductivity, σ ac, measurements taken over the frequency range 10 kHz to 1 MHz were found to follow a power law of the form σ ac ∝ ω n , where ω is the frequency and 0.5〈n〈1, indicative of a hopping conduction mechanism. In addition, a dispersion in the dielectric constant was observed. The dispersion peak frequency has been found to be thermally activated with an activation energy of 0.423±0.002 eV. The results are successfully interpreted in terms of a model proposed by Pike, wherein a classical hopping of charge carriers (over a potential barrier) between the localized states is considered. The direct current conductivity activation energy predicted from this model is found to be consistent with the experimentally obtained value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540648
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