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 environmental contamination and toxicology 30 (1983), S. 99-104 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 30 (1983), S. 58-64 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Conclusions Pollution abatement technologies instituted by recycling paper mills have resulted in a decrease in PCBs in final effluents discharged to the Lower Fox River. Concurrent declines in fish PCB body burdens have also been noted. It is not certain, however, whether the resultant decrease in PCB final effluent concentrations is sufficient to protect aquatic life from bioaccumulation of PCBs above an acceptable level. Furthermore, sediment PCB concentrations remain high in previously impacted areas.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 31 (1983), S. 526-529 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-2048
    Keywords: Gibberellin and protoplast swelling ; Phytochrome ; Protoplast (swelling) ; Triticum (protoplast swelling)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of light on the size of intact protoplasts isolated from the primary leaves of etiolated Triticum aestivum was studied. A 2-min red-light irradiation in the presence of 1 mM KCl was sufficient to cause a swelling of protoplasts compared with those maintained in darkness. The effect was photoreversible by far-red light over two light cycles, indicating the involvement of phytochrome. At 4°C, escape from reversibility occurred between 2 and 5 min after the exposure to red light. In exposure-response experiments, 20 s red light at 27 μmol m-2s-1 was sufficient to saturate the response. Exogenous gibberellic acid added in darkness in the presence of KCl also induced protoplast swelling. Gibberellins may act as an intermediate in the phytochrome-induced swelling of protoplasts.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1573-0603
    Keywords: rabbit ; lens epithelium ; primary culture ; cell line ; lens crystallins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We describe a method of initiating primary cell cultures from lenses of rabbits by an explant-outgrowth technique. These primary cultures routinely yield epithelial cell lines when subcultured with collagenase-trypsin chicken serum. Most lines examined retain the diploid chromosome number through at least 30 passages.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Somatic cell and molecular genetics 6 (1980), S. 653-665 
    ISSN: 1572-9931
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The synthesis of H1 histones was studied in nine mouse-human somatic cell hybrid clones containing reduced numbers of human chromosomes. The entire human genome could be accounted for karyologically and by the use of functional assays for specific enzyme markers encoded by human chromosomes. Chromatographic resolution and peptide mapping of species-specific H1 histones failed to reveal human H1 histones to a level of about 1% of total in the nine clones. In addition to the species-specific extinction of human H1 histones, effects were seen on the quantity of mouse H1 histone subtypes produced in four of the nine clones. The remaining five clones produced H1 histones qualitatively and quantitatively identical with those of the mouse parent, which was common to all nine clones. The results suggest at least two levels of control for H1 histone gene expression.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1572-9931
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Branched-chain aminotransferase (BCT) catalyzes the reversible transamination of the branched-chain α-keto acids to the branched-chainl-amino acids. Since branched-chainl-amino acids (l-isoleucine,l-leucine, andl-valine) are essential for cell growth, cells which lack BCT were unable to proliferate in media containing α-keto acids in place of the correspondingl-amino acids. CHW-1102, a Chinese hamster cell line, lacks BCT and does not grow in α-keto acid media. Somatic cell hybrids were made by the fusion of CHW-1102 (HPRT−) with several human cell lines and isolated on HAT medium. Growth assays of hybrid clones on α-keto acid selection media independent of the HAT selection medium indicated two cell hybrid phenotypes: either (1) the hybrid clone, like the parental CHW-1102, could not utilize α-keto acid media, or (2) the hybrid could proliferate on all three α-keto acid media. The ability of hybrid cells to proliferate on α-keto acid media correlated with the presence of either of two human genes which independently complemented the Chinese hamster deficiency. Two human genes, BCT1 assigned to chromosome 12 and BCT2 assigned to chromosome 19, were demonstrated to code for the expression of two molecular forms of BCT.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1573-5133
    Keywords: Amazonia ; Batoidea ; Brazil ; Captive breeding ; Chondrichthyes ; Colombia ; Elasmobranchii ; Freshwater adaptation ; Growth rate ; Potamotrygonidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Observations of reproductive features and body measurements were made on wild-caught, freshwater stingrays, Potamotrygon circularis and P. motoro, from the Amazon drainage of western Brazil and southern Colombia. Further observations were made in Detroit's Belle Isle Aquarium on a captive pair of P. motoro and their descendants, which constitute the first known captive breeding colony of potamotrygonids. The gross structure and function of female and male reproductive systems are described. There is no obvious difference between those of the two species. They are aplacentally viviparous, the young being nourished in advanced stages by uterine milk secreted by trophonemata. Size at onset and completion of sexual maturation, breeding season and behavior, gestation period, litter size and sex ratios are discussed. Up to 21 proportional measurements were made on several fetal and postnatal stages of both species. Several proportional changes occur in very early fetal life, but most body proportions undergo only minor changes from advanced fetal through adult stages. A growth curve is proposed for P. motoro based on observations of the captive colony.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The X-ray structure determination of (η 5-C5H5)Co(HNC6H4NH) (Ib) reveals that the compound crystallizes in the monoclinic space groupP21/n witha=12.479(3),b=8.865(2),c=17.817(5) Å, {iβ}=94.70(2)°,V=1964.4(6) Å3,Z=8 (two independent molecules form the asymmetric unit). Least-squares refinement based on 1894 independent observed reflections,I≥2.5σ(I), resulted in a finalR value of 0.054. A pattern of somewhat shortened Co-N bonds (〈av〉 1.83 Å), short C-N bonds (〈av〉 1.34 Å), Co-N-C bond angles consistent with trigonally hybridized N, and a nearly planar metallocyclic ring suggest that some electron delocalization may exist in the ring. This pattern, however, may also be explicable in terms of factors other than delocalization; alternatives are discussed. The structure may best be regarded as a CoI complex containing ano-quinonediimine ligand.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Methods in cell science 8 (1983), S. 41-44 
    ISSN: 1573-0603
    Keywords: cell culture ; in situ embedding ; electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A simple method for the in situ embedding of cell cultures for electron microscopy has been developed. The procedure is carried out in its entirety within the culture flask, using only standard fixing and embedding reagents. Precoating of the supporting surface of the flask with alternative substrates is not required. This method permits precise orientation of samples with respect to the phase-contrast image of living cultures.
    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...