ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Springer  (42)
  • American Physical Society  (20)
  • 1995-1999  (55)
  • 1955-1959  (4)
  • 1935-1939  (3)
Sammlung
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Considerations concerning the non-rigid Earth nutation theory (1998)
    Springer
    Celestial mechanics and dynamical astronomy 72 (1998), S. 245-309 
    Details
    ISSN: 1572-9478
    Schlagwort(e): earth's rotation ; precession ; nutation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper presents the reflections of the Working Group of which the tasks were to examine the non-rigid Earth nutation theory. To this aim, six different levels have been identified: Level 1 concerns the input model (giving profiles of the Earth's density and theological properties) for the calculation of the Earth's transfer function of Level 2; Level 2 concerns the integration inside the Earth in order to obtain the Earth's transfer function for the nutations at different frequencies; Level 3 concerns the rigid Earth nutations; Level 4 examines the convolution (products in the frequency domain) between the Earth's nutation transfer function obtained in Level 2, and the rigid Earth nutation (obtained in Level 3). This is for an Earth without ocean and atmosphere; Level 5 concerns the effects of the atmosphere and the oceans on the precession, obliquity rate, and nutations; Level 6 concerns the comparison with the VLBI observations, of the theoretical results obtained in Level 4, corrected for the effects obtained in Level 5. Each level is discussed at the state of the art of the developments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008364926215
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Wood Preservative Leachates from Docks in an Estuarine Environment (1996)
    Springer
    Archives of environmental contamination and toxicology 31 (1996), S. 24-37 
    Details
    ISSN: 1432-0703
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Notizen: Abstract. Environmental concentrations and biological effects of certain metals and organic compounds found in wood preservatives were examined. The study focused on leachates from private residential docks in South Carolina tidal creeks. Copper, chromium, arsenic, and polynuclear aromatic hydrocarbons (PAHs) were measured in composite samples of surficial sediments and naturally occurring oyster populations (Crassostrea virginica) from creeks with high densities of docks, and from nearby reference creeks with no docks. In some cases, metal concentrations in sediments and oysters were higher immediately adjacent to dock pilings than they were elsewhere in the same creek. Sediments from most sites had concentrations of metals and total PAHs which were below levels reported to cause biological effects, however. Solid-phase Microtox® bioassays using whole sediments and rotifer bioassays using sediment pore water showed no significant differences in acute toxicity between creeks with and without docks. Oysters growing directly on dock pilings had significantly higher concentrations of copper than oysters growing at least 10 m away; however, there was no significant difference in the physiological condition of these oysters. Four-day field bioassays measuring percent survival of mummichogs (Fundulus heteroclitus), mud snails (Ilyanassa obsoleta), juvenile red drum (Sciaenops ocellatus), and juvenile white shrimp (Penaeus setiferus) showed no significant differences between sites near to and distant from newly constructed docks. Hatchery-reared oysters showed no significant differences between dock and reference sites in percent survival, growth, or bioaccumulation of metals after six weeks of exposure. The results suggest that, in estuarine environments with a moderate tidal range (1.5–2.0 m), wood preservative leachates from dock pilings have no acutely toxic effects on four common estuarine species, nor do they affect the short-term survival or growth of juvenile oysters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002449900075
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Wood preservative leachates from docks in an estuarine environment (1996)
    Springer
    Archives of environmental contamination and toxicology 31 (1996), S. 24-37 
    Details
    ISSN: 1432-0703
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Notizen: Abstract Environmental concentrations and biological effects of certain metals and organic compounds found in wood preservatives were examined. The study focused on leachates from private residential docks in South Carolina tidal creeks. Copper, chromium, arsenic, and polynuclear aromatic hydrocarbons (PAHs) were measured in composite samples of surficial sediments and naturally occurring oyster populations (Crassostrea virginica) from creeks with high densities of docks, and from nearby reference creeks with no docks. In some cases, metal concentrations in sediments and oysters were higher immediately adjacent to dock pilings than they were elsewhere in the same creek. Sediments from most sites had concentrations of metals and total PAHs which were below levels reported to cause biological effects, however. Solid-phase Microtox® bioassays using whole sediments and rotifer bioassays using sediment pore water showed no significant differences in acute toxicity between creeks with and without docks. Oysters growing directly on dock pilings had significantly higher concentrations of copper than oysters growing at least 10 m away; however, there was no significant difference in the physiological condition of these oysters. Four-day field bioassays measuring percent survival of mummichogs (Fundulus heteroclitus), mud snails (Ilyanassa obsoleta), juvenile red drum (Sciaenops ocellatus), and juvenile white shrimp (Penaeus setiferus) showed no significant differences between sites near to and distant from newly constructed docks. Hatchery-reared oysters showed no significant differences between dock and reference sites in percent survival, growth, or bioaccumulation of metals after six weeks of exposure. The results suggest that, in estuarine environments with a moderate tidal range (1.5–2.0 m), wood preservative leachates from dock pilings have no acutely toxic effects on four common estuarine species, nor do they affect the short-term survival or growth of juvenile oysters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00203904
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    MHC characterization of ALR and ALS mice: respective similarities to the NOD and NON strains (1999)
    Springer
    Immunogenetics 49 (1999), S. 722-726 
    Details
    ISSN: 1432-1211
    Schlagwort(e): Key words MHC ; Autoimmunity ; Diabetes ; Mouse models
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002510050673
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Efficient genetic transformation of red raspberry, Rubus ideaus L. (1995)
    Springer
    Plant cell reports 14 (1995), S. 471-476 
    Details
    ISSN: 1432-203X
    Schlagwort(e): genetic transformation ; S-adenosylmethionine hydrolase gene ; red raspberry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract We have developed an efficient transformation system for red raspberry (Rubus ideaus L.) using Agrobacterium mediated gene transfer. Using this system we have successfully introduced a gene that encodes an enzyme, S-adenosylmethionine hydrolase (SAMase), in raspberry cultivars Meeker (MK), Chilliwack (CH) and Canby (CY). Leaf and petiole expiants were inoculated with disarmed Agrobacterium tumefaciens strain EHA 105 carrying either of two binary vectors, pAG1452 or pAG1552, encoding gene sequences for SAMase under the control of the wound and fruit specific tomato E4 promoter. Primary shoot regenerants on selection medium were chimeral containing both transformed and non-transformed cells. Non-chimeral transgenic clones were developed by iterative culture of petiole, node and leaf explants, on selection medium, from successive generations of shoots derived from the primary regenerants. Percent recovery of transformants was higher with the selection marker gene hygromycin phosphotransferase (hpt), than with neomycin phosphotransferase (nptII). Transformation frequencies of 49.6%, 0.9% and 8.1% were obtained in cultivars Meeker, Chilliwack and Canby respectively from petiole expiants using hygromycin selection. Genomic integration of transgenes was confirmed by Southern hybridization. Transgenic plants from a total of 218 independent transformation events (161 MK, 4 CH, 53 CY) have been successfully established in soil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00232777
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Longitudinal variation in zooplankton δ13C through the Northwest Passage: inference for incorporation of sea-ice POM into pelagic foodwebs (1998)
    Springer
    Polar biology 20 (1998), S. 335-341 
    Details
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Previous research has demonstrated a west-to-east decrease in zooplankton δ13C along the Alaskan coast. We extended the transect into the Canadian Arctic archipelago through the Northwest Passage in order to investigate whether this longitudinal gradient persists eastward. Contrary to the previous observations, zooplankton δ13C was found to be essentially invariate, despite a sampling survey length double that of the earlier studies. This resulted from zooplankton at the coldest and ice-bound stations being found to be enriched in 13C relative to what would be expected from the ambient water temperatures and calculated [CO2aq]. We suggest that this was due to the assimilation of ice POM which, as has been demonstrated for other forms of benthic algae, is enriched in 13C due to restraints on boundary layer diffusion. The present results therefore support other traditional, non-isotope research in suggesting that ice-bound polar foodwebs may be examples of aquatic systems where there is a functional energy connectivity between the attached and openwater environments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003000050311
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    High-Temperature X-ray Diffraction and Dilatometric Studies on some Oxygen Ion Conducting Compounds (1999)
    Springer
    Journal of materials science 18 (1999), S. 355-357 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006664113573
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Isolation and characterisation of full-length cDNA clones of the giant taro (Alocasia macrorrhiza) trypsin/chymotrypsin inhibitor (1996)
    Springer
    Plant molecular biology 30 (1996), S. 1035-1039 
    Details
    ISSN: 1573-5028
    Schlagwort(e): giant taro ; proteinase inhibitor ; PCR ; RACE ; trypsin/chymotrypsin inhibitor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A full-length cDNA encoding the 206 amino acid open reading frame of a trypsin/chymotrypsin inhibitor abundant in the corms of giant taro (Alocasia macrorrhiza) was isolated. An internal fragment was cloned using degenerate primers corresponding to a region of the mature protein sequence and the ‘rapid amplification of cDNA ends’ (RACE) method used to generate a composite cDNA sequence. The length of the cDNA was close to the predicted size of the corresponding transcript deduced from northern blot analysis of corm mRNA. The inhibitor was expressed strongly in the mature corm, at low levels in leaf blades and petioles but not in roots. Southern blot analysis of the giant taro DNA indicated that this inhibitor is encoded by a small multigene family and this was further supported by the isolation of two different sequence classes from corm cDNA using primers to the ends of the composite sequence.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00020813
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    The CFTR Chloride Channel: Nucleotide Interactions and Temperature-dependent Gating (1998)
    Springer
    The journal of membrane biology 163 (1998), S. 55-66 
    Details
    ISSN: 1432-1424
    Schlagwort(e): Key words: Cystic fibrosis — Anion channel — Nucleotide binding — Temperature coefficient — Patch clamp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract. The gating cycle of CFTR (Cystic Fibrosis Transmembrane conductance Regulator) chloride channels requires ATP hydrolysis and can be interrupted by exposure to the nonhydrolyzable nucleotide AMP-PNP. To further characterize nucleotide interactions and channel gating, we have studied the effects of AMP-PNP, protein kinase C (PKC) phosphorylation, and temperature on gating kinetics. The rate of channel locking increased from 1.05 × 10−3 sec−1 to 58.7 × 10−3 sec−1 when AMP-PNP concentration was raised from 0.5 to 5 mm in the presence of 1 mm MgATP and 180 nm protein kinase A catalytic subunit (PKA). Although rapid locking precluded estimation of P o or opening rate immediately after the addition of AMP-PNP to wild-type channels, analysis of locking rates in the presence of high AMP-PNP concentrations revealed two components. The appearance of a distinct, slow component at high [AMP-PNP] is evidence for AMP-PNP interactions at a second site, where competition with ATP would reduce P o and thereby delay locking. All channels exhibited locking when they were strongly phosphorylated by PKA, but not when exposed to PKC alone. AMP-PNP increased P o at temperatures above 30°C but did not cause locking, evidence that the stabilizing interactions between domains, which have been proposed to maintain CFTR in the open burst state, are relatively weak. The temperature dependence of normal CFTR gating by ATP was strongly asymmetric, with the opening rate being much more temperature sensitive (Q 10= 9.6) than the closing rate (Q 10= 3.6). These results are consistent with a cyclic model for gating of phosphorylated CFTR.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002329900370
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Molecular and cellular evidence of chimaeric tissues in primary transgenics and elimination of chimaerism through improved selection protocols (1998)
    Springer
    Transgenic research 7 (1998), S. 123-129 
    Details
    ISSN: 1573-9368
    Schlagwort(e): chimaera ; iterative culture ; regeneration ; strawberry ; transformation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Transgenic plants of strawberry cultivar Totem were developed by Agrobacterium-mediated transformation using a plasmid vector containing gus and nptII genes. Parallel experiments were carried out with and without repeated subculturing (iterative cultures) for generation of transgenic shoots on selection medium. The selection levels in the non-iterative pathway were kept constant, while in the iterative protocol, stepwise increase of selection pressure was applied at different stages of tissue growth. Rooted transgenic plants obtained via both protocols were outplanted in soil. Random leaf samples of greenhouse-grown transgenics were analysed for the presence of gus gene sequences by Southern hybridization as well as gus expression on leaf and petiole tissues by X-Gluc histological assay. Random leaf samples analysed from individual transgenic events developed under iterative culture were positive for the gus insert as verified by Southern analysis confirming the presence of transgenes and lack of chimaeras. Leaf samples of the transgenic events from the non-iterative protocol were either positive or negative on Southern analysis indicating the chimaeric nature of the transgenic plants. The absence of gus sequences in the transgenic plants grown under the non-iterative protocol reinforced the necessity of iterative cultures along with stepwise increase in selection levels for generating non-chimaeric transgenics in strawberry. The gus expression was highly variable, irrespective of the iterative or non-iterative protocol used for transformation. We conclude that strawberry is highly prone to develop chimaeric transgenics if derived from primary regenerants and that the iterative culture technique effectively converts chimaeras to pure line transgenic plants
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008872425917
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...