ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Springer  (37)
  • American Association for the Advancement of Science (AAAS)  (2)
  • Annual Reviews  (1)
  • Seismological Society of America (SSA)
  • 1
    Electronic Resource
    Electronic Resource
    Nervous Control of the Pulmonary Circulation (1980)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 42 (1980), S. 199-210 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.42.030180.001215
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    On the breakup of molten polymeric threads (1975)
    Springer
    Rheologica acta 14 (1975), S. 427-435 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zusammenfassung Der Zerfall von Fäden mit hoher Viskosität wird durch Anwendung der Bewegungsgleichungen und der Kontinuitätsgleichung untersucht. Die Analyse basiert auf der Annahme, daß der Fadenzerfall durch kleine Störungen hervorgerufen wird, die sich längs des Fadens ausbreiten. Die vorliegende Untersuchung liefert nur ein qualitatives Ergebnis. Eine quantitative Analyse würde die Auswertung von Kontinuitäts-, Bewegungs- und Energiegleichungen zur Voraussetzung haben. Sie macht aber deutlich, wie die Stabilitätsänderungen von den mechanischen Eigenschaften der Flüssigkeit, der Dehngeschwindigkeit und den Dimensionen des dem Spinnprozeß unterworfenen Fadens abhängen. Der Fadenzerfall kann qualitativ durch die zwischen dem Auftreten der Störung und dem Zerfall liegende Zeitdauer, die „Zerfallszeit“ gekennzeichnet werden. Die elastischen Eigenschaften von Polymerschmelzen bewirken eine Vergrößerung dieser Zerfallszeit, die Zunahme der Dehngeschwindigkeit dagegen eine Verringerung.
    Notes: Summary The breakup of high viscosity threads was analyzed by the application of the equations of motion and continuity. The analysis is based on the assumption that the thread breakup results from small disturbances developing along the thread. The present study has only qualitative value, quantitative analysis requires the application of equations of continuity, motion and energy. However, the analysis clearly demonstrates changes in the stability of the thread resulting from the mechanical properties of the liquid as well as the extension rate and the dimensions of the thread subjected to the spinning process. The thread breakup can be characterized qualitatively by the time which elapses from the application of the disturbance on the thread until its breakup. This is the “breakup time”. Elastic properties of the molten polymer increase the breakup time of the thread. An increase in the extension rate of the thread reduces the breakup time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01527138
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Comparative thermal ecology of two lizards (1980)
    Springer
    Oecologia 44 (1980), S. 171-176 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In a habitat judged to be energetically costly for thermoregulation, mean body temperatures (MBT's) ofAnolis sagrei are significantly higher than those ofA. distichus. As indexed by the slope of the regression of body temperatures (T b ) on substrate temperature (T s ),A. sagrei is more dependent upon environmental temperatures thanA. distichus. In a habitat judged to be less costly for thermoregulation and where interspecific competition for perch sites may be less, MBT's ofA. sagrei are significantly higher, proportionally more lizards occupy sunny perches, and the slope of the regression of T b on T s is significantly less, than for conspecifics in the costly habitat. As indexed by length-specific fat body weights, well-nourished lizards in the costly habitat have T b 's which are independent of environmental temperature; T b 's of poorly-nourished lizards are highly dependent upon environmental temperature. This relationship does not hold for lizards in the low-cost habitat. These results corroborate the hypothesis that energetic costs are important in controlling the extent to which lizards thermoregulate. In high-cost habitats lizards thermoregulate less precisely than in low-cost habitats. Lizards that exploit the habitat as if it were highly productive thermoregulate more precisely than lizards that exploit the environment as if it were of low productivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572675
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Calcitonin secretion in renal disease (1976)
    Springer
    Calcified tissue international 22 (1976), S. 154-157 
    Details
    ISSN: 1432-0827
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064057
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Calcitonin heterogeneity:in vivo andin vitro studies (1976)
    Springer
    Calcified tissue international 22 (1976), S. 298-302 
    Details
    ISSN: 1432-0827
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064083
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Cytological variations in the constitutive heterochromatin of Microtus agrestis (1971)
    Springer
    Chromosoma 35 (1971), S. 117-124 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In the field vole, Microtus agrestis, most of the constitutive heterochromatin is localized in the giant chromosomes. A detailed examination of a large number of adult cell types reveals that this chromatin is actually present as a heterochromatic fiber in all interphase nuclei. Depending upon the cell types, however, the fiber shows varying degrees of condensation and folding ranging from a very long and extended fiber to a large compact chromocenter. The number of cell types with giant chromocenters was less commonly observed than those with extended fibers. This explains why some cells were previously thought to be devoid of heterochromatin.—The results of this investigation strongly indicate that constitutive heterochromatin represents a unique nuclear entity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285732
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A developmental study of constitutive heterochromatin in Microtus agrestis (1971)
    Springer
    Chromosoma 32 (1971), S. 237-250 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In the vole, Microtus agrestis, the constitutive heterochromatin is largely restricted to the giant sex chromosomes but varies in its degree of condensation in various cell types. In the cleavage embryos and fibroblasts it formed one or two long and extended heterochromatic fibers, in hepatocytes it formed two large and diffuse masses and in neurons, spermatogonia and oogonia it formed two large and compact masses. The basic patterns of all differentiated cells were essentially unchanged throughout development.—At all stages of development and in cells of all types, mitotic nuclei displayed two large heteropycnotic chromosomes in prophase and persistent condensation in telophase. Apposition and delayed separation of chromatids of the giant chromosomes was also observed in metaphase and anaphase, respectively. During the first meiotic prophase of spermatocytes and oocytes, the giant chromosomes were also heteropycnotic.—The results strongly suggest that constitutive heterochromatin is localized in the same chromosomes throughout development and represents a specific entity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284837
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Failure behaviour of particulate-reinforced aluminium alloy composites under uniaxial tension (1992)
    Springer
    Journal of materials science 27 (1992), S. 5453-5462 
    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 Tensile tests were carried out at room temperature on 6061-aluminium alloy reinforced with SiC and Al2O3 particulates. Although a significant increase in strength could be achieved by introducing ceramic reinforcements into the aluminium alloy matrix, it is associated with a substantial decrease in fracture strain. In order to understand the reason for the inferior ductility of such composites, analytical solutions were obtained using a simple composite model. SEM studies were carried out on the side surfaces of the fractured specimens to verify the proposed failure behaviour. Failure modes observed to operate in such composites under uniaxial tension are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541606
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Electron microscopy of the nuclei of denervated skeletal muscle (1963)
    Springer
    Cell & tissue research 61 (1963), S. 168-182 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Denervated musculi gastrocnemii and solei of adult rats and rabbits were studied by weight analysis and by light and electron microscopy. The weight loss was severe and indicative of degenerative atrophy. Microscopic examinations showed no difference between the changes of nuclei in the gastrocnemius as compared with the soleus or between these muscles whether they were from rats or rabbits. Mitoses were found neither in normal nor in denervated muscle fibers, not even in animals which were killed at 3 o'clock in the morning or injected with colcemid at appropriate periods before death. Electron microscopic studies showed the earliest changes in the nuclei of denervated muscle to appear four hours after denervation. They involved aggregation of chromatin granules, loosening of nucleolar substance and uneven density of the nuclear membrane. They became very pronounced one to five days after denervation. Between the first week and the third month of denervation atrophy, infoldings and constrictions of muscle nuclei were conspicuous. From the fourth to fifth month, additional changes were the partitioning of muscle nuclei and the condensation of nuclear fragments and of nucleoli. Our findings gave no indication of mitoses to account for nuclear proliferation. Numerous and deep infoldings seen under the electron microscope indicated processes of nuclear partition which might produce viable nuclei, or nuclei subject to pyknosis, or might lead to ultimate disintegration of the fragments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339668
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Numerical Simulation of Low Mach Number Reactive Flows (1997)
    Springer
    Journal of scientific computing 12 (1997), S. 139-167 
    Details
    ISSN: 1573-7691
    Keywords: Combustion ; numerical simulation ; opposed jet flames ; porous particle combustion ; splitting method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract A new formulation for the numerical solution of low Mach number compressible flow problems is presented and analyzed. In this formulation the thermal part (energy and species equations) is solved implicitly and decoupled from the momentum equation, whereas the hydrodynamic part (momentum-continuity) is advanced in time using a high order splitting approach which results in overall high order accuracy in time and minimal errors in mass conservation. These errors are analyzed using both analytical tools and benchmark numerical examples. Results from two-dimensional simulations with one-step global reaction in opposed jet flame and porous particle configurations are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1025669715376
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...