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
  • 1
    Electronic Resource
    Electronic Resource
    An improved method for screening Frankia viability in strain CcI3 (1997)
    Springer
    Experimental biology online 2 (1997), S. 1-4 
    Details
    ISSN: 1430-3418
    Keywords: Frankia ; Tetrazolium red ; Vital staining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An improved method for determining the viability of the nitrogen-fixing actinomycete Frankia is presented. This method uses tetrazolium red as a vital stain, which proved more effective than a previously used method of acridine orange staining.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00898-997-0013-8
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An Antenniform Extra Appendage in Dilophus tibialis, Loew (1896)
    Springer
    Development genes and evolution 3 (1896), S. 261-268 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02152850
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Depletion of reserves in ant queens during claustral colony founding (1996)
    Springer
    Insectes sociaux 43 (1996), S. 297-302 
    Details
    ISSN: 1420-9098
    Keywords: Storage protein ; lipid ; mating flight
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Gynes in the claustrally-founding speciesCrematogaster opuntiae andCamponotus festinatus accumulate large amounts of protein and lipid between the time of eclosion and mating. During colony founding, protein is depleted from both the thorax and abdomen and lipid from the abdomen. The abdomen, and specifically its accumulated storage protein, provides an amino acid store equivalent to or larger than that of flight muscle. The importance of this second major protein reserve in the evolution of claustral colony founding should be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242930
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Estimation of sperm numbers in insects by fluorometry (1995)
    Springer
    Insectes sociaux 42 (1995), S. 449-452 
    Details
    ISSN: 1420-9098
    Keywords: Sperm quantification ; sperm counts ; ants ; fluorometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary To facilitate the study of mating biology in the desert leaf-cutter antAcromyrmex versicolor, methods were developed that allowed storage and easy quantification of sperm samples collected from both male and female reproductive tracts. Sperm samples stored frozen were sonicated, stained with a fluorescent DNA stain, and the fluorescence emitted by the stained sperm heads was measured. The intensity of fluorescence was shown to be a linear function of the number of sperm in the sample as determined by counting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242172
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Glycine: a new anti-inflammatory immunonutrient (1999)
    Springer
    Cellular and molecular life sciences 56 (1999), S. 843-856 
    Details
    ISSN: 1420-9071
    Keywords: Key words. Glycine; immunoregulation; anti-inflammatory; glycine receptor.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The mechanism of the immunosuppressive effects of glycine and its pathophysiological applications are discussed in this review. Glycine has been well characterized in spinal cord as an inhibitory neurotransmitter which activates a glycine-gated chloride channel (GlyR) expressed in postsynaptic membranes. Activation of the channel allows the influx of chloride, preventing depolarization of the plasma membrane and the potentiation of excitatory signals along the axon. Glycine has recently been shown to have similar inhibitory effects on several white blood cells, including hepatic and alveolar macrophages, neutrophils, and lymphocytes. Pharmacological analysis using a GlyR antagonist strychnine, chloride-free buffer, and radiolabeled chloride has provided convincing evidence to support the hypothesis that many white blood cells contain a glycine-gated chloride channel with properties similar to the spinal cord GlyR. Molecular analysis using reverse transcription-polymerase chain reaction and Western blotting has identified the mRNA and protein for the β subunit of the GlyR in total RNA and purified membrane protein from rat Kupffer cells. Dietary glycine is protective in rat models against endotoxemia, liver ischemia-reperfusion, and liver transplantation, most likely by inactivating the Kupffer cell via this newly identified glycine-gated chloride channel. Glycine also prevents the growth of B16 melanomas cell in vivo. Moreover, dietary glycine is protective in the kidney against cyclosporin A toxicity and ischemia-reperfusion injury. Glycine may be useful clinically for the treatment of sepsis, adult respiratory distress syndrome, arthritis, and other diseases with an inflammatory component.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000180050030
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Anemotropism and other tropisms in insects (1899)
    Springer
    Development genes and evolution 8 (1899), S. 373-381 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02156653
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Geologic assessment of environmental impact in Lake Macatawa, Michigan (1978)
    Springer
    Environmental geology 2 (1978), S. 67-78 
    Details
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract A historical record of the effects of human development upon Lake Macatawa is established using geologic criteria. Significant cultural events are recognized using the pollen record, particularly ambrosia/vesiculate pollen ratios, and occurrences of detrital and chemical contaminants within the more recent sedimentary column. Detrital contaminants include such things as cinder and ash from coal burning power plants and animal hair from early tanning operations. Trace metal contaminants, frequently associated with specific industrial events, are particularly useful in establishing a modern sedimentary chronology. The impact of human activity upon Lake Macatawa is measured using fossil diatoms. The advantage of this method of environmental impact assessment is that it provides a historical perspective in which changes within an environment are related to its natural conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380470
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Sedimentary processes and trace metal contaminants in the buccaneer oil/gas field, northwestern gulf of Mexico (1980)
    Springer
    Environmental geology 3 (1980), S. 163-175 
    Details
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Sediments are the ultimate sink for contaminants in the marine environment, and physical processes of sedimentation influence the distribution and accumulation of these contaminants. Evaluation of contaminant levels in sediments is one approach to assessing environmental impact; data interpretation depends on consideration of sediment texture and mineralogy, however, which profoundly influence chemical composition. In this study, comparison of potentially contaminated sediments from the production field with control populations was done only within the context of similar (as to texture and organic carbon and carbonate content) sample groups as determined by cluster analysis. Ba, Cd, and Sr are identified as contaminants. Supported by the identification of a well-crystallized expandable clay—possibly bentonite—drilling fluids are a potential source of Ba. Ba and Sr may be unnaturally high because of their abundance in discharged produced formation waters, but may also be naturally controlled by the unique faunal assemblage associated with the structures. Cd is probably derived from corrosion of the structures and assorted debris on the seafloor. In general, contamination is limited to an area within 100 m of the platforms. Furthermore, substantial erosion around platforms has probably effectively removed and dispersed the bulk of the contaminants introduced into the marine environment by the offshore exploration/production operations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02473492
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Behavioral response to hydrostatic pressure in larvae of two species of xanthid crabs (1978)
    Springer
    Marine biology 46 (1978), S. 167-174 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Responses of pelagic larvae of two species of xanthid crabs to manipulations of hydrostatic pressure were examined and compared. One species, Rhithropanopeus harrisii (Gould), is a temperate estuarine species, while the other, Leptodius floridanus (Gibbes), inhabits shallow water and reefs in tropical and subtropical regions. All zoeal stages of R. harrisii detected pressure stimuli presented in increments as small as 0.025 atm. Both Stage I and II zoeae of L. floridanus responded to pressure stimuli presented in increments of 0.1 atm. Stage I responded when pressure was changed by the smallest increment tested, 0.025 atm, but Stage II did not. L. floridanus zoeal Stages III and IV, however, did not change vertical position relative to control larvae when subjected to pressure stimuli. The capacity of R. harrisii zoeae to respond to changes in hydrostatic pressure may be related to their retention in the estuarine environment. In L. floridanus, a non-estuarine species, the pressure response is important only in the first zoeal stage and may function promarily in dispersal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391533
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Effect of boundary layer transport on the fixation of carbon by the giant kelp Macrocystis pyrifera (1980)
    Springer
    Marine biology 56 (1980), S. 103-110 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The uptake of inorganic carbon into the thallus of Macrocystis pyrifera (L.) C. Ag. requires first that the inorganic carbon pass through the water medium to the plant surface. This transfer of inorganic carbon to the thallus must take place through a boundary layer. Experiments in water tunnels indicate that the boundary layer adjacent to the M. pyrifera blade may be turbulent in water speeds as low as 1 cm sec-1. Photosynthetic output of the blade can be increased by a factor of 300% by increasing water speeds over the blade surface from 0 to 4 cm sec-1. This is consistent with a decrease in the thickness of the boundary layer. Above 4 cm sec-1, the assimilation of carbon was limiting. The assimilation of carbon is generally known to follow Michaelis-Menten-like kinetics. Combining the two uptake steps into an overall model of carbon uptake agrees well with photosynthetic data obtained from M. pyrifera under varying conditions of water speed and bicarbonate concentrations in the laboratory. The ecological and morphological consequences of these findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397128
    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...