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
    Isolation and cultivation of microbes with biodegradative potential (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 1191-1198 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990356
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Sources of intraspecific variation in the hostplant seeking behavior of Colias butterflies (1983)
    Springer
    Oecologia 60 (1983), S. 365-370 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Egg-laying females of the legume-feeding butterfly Colias philodice eriphyle were observed within a high-altitude study site during 1977 and 1978. Average oviposition selectivity showed two pattern sof seasonal variation. First, second brood females laid eggs more frequently after alighting upon hostplants than did first brood females in both years. Second, a consistent decline in post-alighting oviposition probability near the end of the second brood corresponded with a dramatic decrease in the water content of hostplant foliage near the end of the dry summer season. In addition to seasonal variation in oviposition behavior, individual females landed and oviposited upon widely varying sets of legume hostplant species. By sampling hostplant abundances along the flightpaths of observed females, we show that individuals varied in their tendency to land upon different hostplants. Females tended to specialize upon one or two species, at least in the short term, and the pattern of oligophagy for the population as a whole is partly generated by variation in the host-seeking behavior of individual females.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376853
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Photosynthetic characteristics of Sonoran Desert winter annuals (1983)
    Springer
    Oecologia 59 (1983), S. 101-105 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Photosynthesis in Sonoran Desert winter annuals appeared to be similar to those observed in other C3 photosynthetic pathway herbs, although photosynthetic capacities ranged from 18 to 65 μmol CO1 m-2 s-1 under natural conditions. The higher photosynthetic capacities were associated with high leaf conductances to water vapor (up to 39 mm s-1). Leaf Kjeldahl nitrogen contents were high, ranging up to 44.9 mg g-1. We suggest that the high photosynthetic capacities in several species may be related to resource availability and enable successful exploitation of the short, unpredictable growth periods experienced by these annuals. Although photosynthetic rates in desert winter annuals spanned a wide range, the relationship between leaf conductance and maximum photosynthesis appeared simiar to that of other C3 vascular plants. It is possible that the resulting constant intercellular, CO2 concentrations were related to minimizing excessive water loss, while not severely imposing limitations to photosynthetic gains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388081
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Corrosion of Pembina crude oil pipeline (1983)
    Springer
    Applied microbiology and biotechnology 17 (1983), S. 173-177 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Corrosion failure of the Pembina pipeline system of North Central Alberta, Canada, was frequent and was associated with constant bacterial load and sulphide in the crude oil and produced water. The bacterial load included a variety of anaerobic and aerobic/facultative bacteria which acted in concert to produce sulphide, giving rise to a “cascade of sulphide generation”. A total of 256 isolates from the crude oil were tested for ability to reduce oxidized sulphur compounds to sulphide. Five groups of bacteria, (A-E), based on this ability to reduce sulphur compounds, existed in the crude oil system. Group A reduced sulphur compounds with oxidation states +6; and lower, Group B reduced oxidation state +4 and below; Group C, oxidation states +2 and lower. Group D reduced only oxidation state 0 (elemental Sulphur), while Group E could reduce no sulphur compound to sulphide. It was found that a ceiling on the reductive capability of each bacterial group was set by the oxidation state of the sulphur compounds. The result is a synergistic relationship whereby intermediate products of reductive activities of each group form the substrate for subsequent action by other groups until sulphide is produced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00505884
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Inhibition of host phenoloxidase activity by parasitoid hymenoptera (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 1022-1024 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Partial or complete inhibition of hemolymph phenoloxidase activity occurred in host species attacked by some parasitoid wasps. In one system, inhibition of enzyme activity could be achieved by injection of a virus purified from parasitoid ovaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01989783
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The mechanisms of the formation and growth of water bubbles and associated dislocation loops in synthetic quartz (1983)
    Springer
    Physics and chemistry of minerals 9 (1983), S. 79-94 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The development of water bubbles in synthetic quartz has been monitored by measurements of (i) the intensity of the light scattered and (ii) the increase in volume of the crystal, both as a function of temperature and time. These macroscopic measurements have been complemented by observations of the resulting microstructures, using transmission electron microscopy (TEM). A mechanism is proposed on the assumption that hydrogen is incorporated in the quartz structure by means of (4 H)Si defects. On heating, these defects diffuse and clusters develop. A cluster of n(4 H)Si produces a water bubble of (n−1)H2O, without any change of volume of the crystal. At any temperature T there is a critical bubble diameter above which the “steam” pressure P exceeds the pressure p for a spherical bubble in mechanical equilibrium. If P becomes greater than p, then the bubble increases in volume until P=p, the increase in volume being achieved by the pipe diffusion of Si and O away from the bubble site into a linked edge dislocation loop. This process produces the observed increase in volume of the crystal. The two diffusion processes take place virtually simultaneously and continue until all the (4 H)Si defects have been trapped in the bubbles. Values of the diffusion constant and the activation energy for the diffusion of the (4 H)Si defects are deduced. The relevance of these observations to the hydrolytic weakening of quartz is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308151
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The binding of ketamine to plasma proteins: Emphasis on human plasma (1983)
    Springer
    European journal of clinical pharmacology 24 (1983), S. 825-831 
    Details
    ISSN: 1432-1041
    Keywords: ketamine ; binding to plasma proteins ; alpha1-acid glycoprotein ; albumin ; pH change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We report for the first time that ketamine (K) is bound as much as 47% to human plasma. It was shown that binding of K to plasma and albumin is dependent on pH; binding is decreased at pH lower than 7.4 and increased at higher pH. This is in concordance with the pKa of K being 7.5; the partition coefficient between an organic phase and buffer was found to be sensitive to small pH changes. Binding of K is also influenced by albumin concentration and the affinity of K for human α1-acid glycoprotein (AAG) is much higher than for human albumin (HSA). The major metabolite nor-K does not appreciably displace K from binding sites on HSA. These findings may explain in part the variability of binding of K observed with different human samples. Human cord plasma exhibits a lower binding of K than adult plasma. This is probably the result of much lower AAG concentration in cord compared to adult plasma; cord and adult plasma albumin levels are known to be only slightly different. Since K has 2 optically active isomers, one of which is more potent than the other, experiments on the binding of racemic and the 2 isomers of K were performed; no differences in binding to AAG were found. We were, however, able to show that tris (butoxyethyl) phosphate (TBEP) can abolish binding of K to AAG. Thus the presence of TBEP would interfere in determining plasma levels and distribution of K. An example would be in the measurement of the partition of K between human red cells and plasma. We determined this ratio in human blood in the absence of TBEP and found it to be similar to that reported for dog red blood cells and plasma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00607095
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Comparative multiple dose kinetics of two formulations of indomethacin (1983)
    Springer
    European journal of clinical pharmacology 24 (1983), S. 563-568 
    Details
    ISSN: 1432-1041
    Keywords: indomethacin ; multi-dose kinetics ; controlled release formulation ; capsule formulation ; bioavailability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The kinetics of a controlled release (CR) formulation of indomethacin 75 mg (Indocid-Retard®) given once daily was compared with a conventional 25 mg indomethacin capsule (Indocid®) given 3 times daily for 7 days, to 14 healthy volunteers, using a randomized, cross-over, multiple-dose study design. The following differences in plasma indomethacin profiles after the 2 treatments were observed: average peak concentrations (Cmax) for the CR regimen were higher and the time to peak (Tmax) was significantly delayed. Trough (pre-morning dose) plasma concentrations (Cmin) on Days 2, 5, 6 and 7 were significantly lower after the CR-formulation. No statistically significant differences between preparations for area under the plasma concentration time curve (AUC0–24h) or for renal clearance were observed. Average steady-state plasma concentrations (C p ss ) on Day 7 of the multiple dose regimens averaged 0.477 and 0.427 µg/ml for the 75 mg CR once daily and the conventional 25 mg t.i.d. treatments, respectively. These results show that the bioavailability of the CR and conventional indomethacin formulations under these multiple-dose conditions was not significantly different.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00609904
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Respiratory nitrate reduction by Desulfovibrio sp. (1983)
    Springer
    Archives of microbiology 135 (1983), S. 182-185 
    Details
    ISSN: 1432-072X
    Keywords: Respiratory nitrate reduction ; Desulfovibrio ; 15N Isotope Labelling ; Ammonium production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four strains of Desulfovibrio produced ammonium during growth on a defined medium containing 100 μg NO 3 - -N/ml in the presence of 1 mM sulfate. Ammonium was not produced by cultures grown in media devoid of sulfate nor in media containing 35 mM sulfate. The four strains of Desulfovibrio studied reduced 32.7–46% of the available nitrate to ammonium in 21 days incubation. Ammonium production from nitrate was confirmed by recovering 15N-enriched ammonium when 15N-enriched Ca(NO3)2 was utilized as the substrate for the reduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414476
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Fluxes of gases and particles above a deciduous forest in wintertime (1983)
    Springer
    Boundary layer meteorology 27 (1983), S. 237-255 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Eddy-correlation measurements of the vertical fluxes of ozone, carbon dioxide, fine particles with diameter near 0.1 Μm, and particulate sulfur, as well as of momentum, heat and water vapor, have been taken above a tall leafless deciduous forest in wintertime. During the experimental period of one week, ozone deposition velocities varied from about 0.1 cm s−1 at night to more than 0.4 cm s-1 during the daytime, with the largest variations associated primarily with changes in solar irradiation. Most of the ozone removal took place in the upper canopy. Carbon dioxide fluxes were directed upward due to respiration and exhibited a strong dependence on air temperature and solar heating. The fluxes were approximately zero at air temperatures less than 5 °C and approached 0.8 mg m−2 s−1 when temperatures exceeded 15 °C during the daytime. Fine-particle deposition rates were large at times, with deposition velocities near 0.8 cm s−1 when turbulence levels were high, but fluxes directed upward were found above the canopy when the surface beneath was covered with snow. Diffusional processes seemed to dominate fine-particle transfer across quasilaminar layers and subsequent deposition to the upper canopy. Deposition velocities for particulate sulfur were highly variable and averaged to a value small in magnitude as compared to similar measurements taken previously over a pine forest in summer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00125000
    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...