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
  • Articles  (28)
  • Springer  (28)
Collection
  • Articles  (28)
Source
Keywords
Publisher
Years
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Effect of simulated sampling disturbance on creep behaviour of rock salt (1987)
    Springer
    Rock mechanics and rock engineering 20 (1987), S. 261-275 
    Details
    ISSN: 1434-453X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Notes: Summary This article presents the results of an experimental study of creep behaviour of a rock salt under uniaxial compression as a function of prestrain, simulating sampling disturbance. The prestrain was produced by radial compressive loading of the specimens prior to creep testing. The tests were conducted on an artifical salt to avoid excessive scattering of the results. The results obtained from several series of single-stage creep tests show that, at short-term, the creep response of salt is strongly affected by the preloading history of samples. The nature of this effect depends upon the intensity of radial compressive preloading, and its magnitude is a function of the creep stress level. The effect, however, decreases with increasing plastic deformation, indicating that large creep strains may eventually lead to a complete loss of preloading memory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024645
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Inhibition of fading in fluorescence microscopy of fixed cells (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 400-401 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Following Hirschfeld et al., dithionite was added to mounting media to inhibit fluorescence fading. Excellent response is reported for fluorescein, acridine orange, 33258 Hoechst, acriflavine, berberine (and ethidium bromide), but not for quinacrine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01964376
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Daunomycin-bands are similar to Q-bands on chromosomes of Vicia faba (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 756-757 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Lin et al. discovered fluorescent bands on human chromosomes stained with daunomycin (D-bands). These bands looked like Q-bands. We demonstrate D-bands, which look like respective Q-bands, in Vicia faba and infer that the similarity between D and Q banding is general.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944174
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Geographic variation and evolution in the life cycle of the witch-hazel leaf gall aphid, Hormaphis hamamelidis (1989)
    Springer
    Oecologia 78 (1989), S. 165-175 
    Details
    ISSN: 1432-1939
    Keywords: Aphids ; Complex life cycles ; Gall ; Hostalternation ; Monoecy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two divergent life cycles associated with different elevations and latitudes have been documented for the witch-hazel leaf gall aphid, Hormaphis hamamelidis. At low elevation in northern Virginia, the aphid had seven distinct generations alternating between the primary host, witchhazel (Hamamelis virginiana), and a secondary host, river birch (Betula nigra). These findings confirm the original published life cycle description for the same locality. A second, abbreviated life cycle consisting of only three generations restricted to witch-hazel was discovered at high elevation (1000 m) in north central and northwestern Virginia. Aphids of both life cycles were sympatric at a middle elevation site. The life cycles and morphology suggest that the two forms are separate species. Although monoecious life cycles on primary hosts in aphids generally are thought to be ancestral to complex host-alternating ones, it is certainly possible that monoecious cycles are sometimes secondarily derived from complex cycles. By constructing a preliminary phylogeny of the described species in the tribe Hormaphidini, we propose that the abbreviated life cycle is derived from the complex one in the case of these witchhazel gall aphids. Our findings are discussed in the context of current theory regarding the evolutionary stability of complex life cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377152
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structural and microspectrofluorometric studies on glial cells from the periventricular and arcuate nuclei of the rat hypothalamus (1980)
    Springer
    Cell & tissue research 211 (1980), S. 503-510 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Glia structure ; Fluorescence spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Fluorescence spectroscopy and electron microscopic techniques have been employed to investigate a class of glial cells that is characterized by the presence in their cytoplasm of large fluorescing inclusions that stain with paraldehyde-fuchsin or chrome-hematoxyline-alum. In the periventricular nucleus the cells have been identified as a population of astrocytes whose inclusions emit an orange-red fluorescence. In the arcuate nucleus there are, in addition to an overwhelming majority of such astrocytes, also some microglial cells with similar characteristics. The ability of the latter to emit any kind of fluorescence has not yet been established. The fluorescence maximum of these astrocytic inclusions was found to be at 640 nm when excited at 405 nm. The data obtained suggest that the fluorescence observed is due to the presence of porphyrins in the astrocytic inclusions. In the majority of our electron microscopic pictures the inclusions lack a bounding membrane. By contrast, neuronal lipofuscin has an outer membrane. In cryostat sections, the lipofuscin emits a yellow fluorescence when excited at 400–410 Onm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234404
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    General guidelines for national inventories of mineral resources (1978)
    Springer
    Mathematical geology 10 (1978), S. 419-423 
    Details
    ISSN: 1573-8868
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02461974
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Oil prospects of the helez formation, southern hashephela region, Israel: Evaluation of the thoroughness of search achieved by past exploration (1983)
    Springer
    Mathematical geology 15 (1983), S. 211-215 
    Details
    ISSN: 1573-8868
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01030085
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Multivariate analysis of biogenic constituents in recent sediments off Ras Burka, Gulf of Elat, Red Sea (1977)
    Springer
    Mathematical geology 9 (1977), S. 77-98 
    Details
    ISSN: 1573-8868
    Keywords: classification ; factor analysis ; association analysis ; binary data ; Recent carbonates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract The shallow shelf area to a water depth of 40 m off Ras Burka, Gulf of Elat, comprises several depositional zones. In order of increasing water depth these include: sand dune (on shore); swash; dead reef platform; sand channel; live coral reef; Cymodoceaslope; reef knolls; and Halophilalawn. The abundance of 64 biogenic constituents, comprising 48 genera of Foraminifera and a variety of other taxa, was recorded in 16 samples representing the sediments presently forming in the various environments. Nodal ordination and association analysis were applied to classify the samples and to examine whether the present day zonation of sedimentary environments can be objectively recognized on the basis of the assemblages of biogenic constituents. The analyses classified the samples consistently into three classes, identified as the shallow near-shore, the upper slope, and the lower slope zones. Association analysis, utilizing only discrete binary presence or absence scores, yielded better results than nodal ordination analysis utilizing continuous metric modal data. In the study area, biogenic grains other than Foraminifera do not contribute to the environmental discrimination. The results suggest that crude presence scores, as contrasted with refined metric data, are informative enough for differentiating sedimentary environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02312497
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Design of geological data systems for developing nations (1977)
    Springer
    Mathematical geology 9 (1977), S. 145-157 
    Details
    ISSN: 1573-8868
    Keywords: data processing ; data systems ; data files
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract For analytical, inventory, and a variety of other basic types of geological data the main functions of an information management system can adequately be accommodated by simple systems in which comprehensiveness is compromised in favor of practicality and ease of implementation. Albeit possessing some shortcomings, such a strategy is likely to prove profitable particularly to geologists in developing nations who are confronted with the task of self-developing much needed geological data systems in the face of limited electronic data processing resources. Based on the experience of the Geological Survey of Israel, several considerations and practical guidelines for the design and implementation of such systems can be outlined. Data bases should be limited in their scope to specific subjects or projects, be designed to serve existing and only the more realistic foreseeable needs, and include provisions for merger and intelligent communication with related files. Such data bases typically contain logically simple-structured information and are small in size. Revision, deletion, and update transactions are infrequent; the search criteria for retrieval are for the most part predictable and a fast response time is not essential. These attributes prescribe a preference for simple fixed- or semi-free-format sequential files which, in turn, simplify appreciably the programming of the supporting software. Input forms should be meticulously planned with due consideration given to aspects of software compatibility, user convenience and acceptance, and efficiency in data gathering. The use of standard forms should be integrated into the institution's routine to facilitate direct data entry by each contributor, thereby improving and economizing the data collection process, and to secure data capture at its acquisition level (field, laboratory). The user's more immediate retrieval needs are adequately satisfied by a master list, documenting the entire data base and a number of external inverted index directories cross-referencing the master list according to the attributes by which the file is most likely to be searched. Further development of output capabilities should be directed to provide for flexible retrieval by multikey query functions and base map posting. For data files storing raw chemical analyses of rocks and water samples, the incorporation of processing capabilities to compute interpretative geochemical parameters as an integral part of the system's output is particularly useful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02312509
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Binding protein-dependent transport systems (1990)
    Springer
    Journal of bioenergetics and biomembranes 22 (1990), S. 571-592 
    Details
    ISSN: 1573-6881
    Keywords: ATP ; periplasm ; binding protein ; cystic fibrosis ; multidrug resistance ; P-glycoprotein ; import ; export ; transport ; membrane protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract Bacterial binding protein-dependent transport systems are the best characterized members of a superfamily of transporters which are structurally, functionally, and evolutionary related to each other. These transporters are not only found in bacteria but also in yeasts, plants, and animals including man, and include both import and export systems. Although any single system is relatively specific, different systems handle very different substrates which can be inorganic ions, amino acids, sugars, large polysaccharides, or even proteins. Some are of considerable medical importance, including Mdr, the protein responsible for multidrug resistance in human tumors, and the product of the cystic fibrosis locus. In this article we review the current state of knowledge on the structure and function of the protein components of these transporters, the mechanism by which transport is mediated, and the role of ATP in the transport process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00762962
    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...