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  • Springer  (2,297)
  • 1985-1989  (2,297)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    The bacterial biota on crustose (nonarticulated) coralline algae from Tasmanian waters (1985)
    Springer
    Microbial ecology 11 (1985), S. 221-230 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The bacterial biota associated with the cuticle surface of healthy benthic samples of crustose nonarticulated coralline algae from the east coast of Tasmania (Australia) was examined by bacteriological cultivation and electron microscopy. In 32 samples studied, the viable count on Zobell's marine agar (supplemented with vitamins) was 3.3×106 bacteria g−1 wet wt. (range 2.9×104–2.7×107). Of 732 strains isolated from 16 out of 32 samples and identified to genus level,Moraxella was the predominant genus (66%). In contrast,Moraxella comprised only 11% of 217 strains isolated from benthic seawater samples collected at the same time as coralline algae. In 22 out of 32 algal samples examined by scanning electron microscopy, the total count was 1.6 × 107 bacteria g−1 wet wt. (range 5.1× 106–3.8×107); the major morphotype was cocco-bacilli (80%). Several environmental factors did not significantly influence the viable count or generic distribution, or the total count or morphotypic distribution of bacteria on the cuticle. These factors included geographical site, season, storage of samples in aquarium conditions, and the presence or absence of abalone from shells that the coralline algae encrusted. The microbiota, consisting mostly of the nonmotile bacterial genusMoraxella, appeared to be highly adapted to its calcerous plant host.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02010601
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  • 2
    Electronic Resource
    Electronic Resource
    Photoreactivation in Methanobacterium thermoautotrophicum (1985)
    Springer
    Archives of microbiology 143 (1985), S. 147-150 
    Details
    ISSN: 1432-072X
    Keywords: Archaebacteria ; Methanogenic bacteria ; UV-sensitivity ; Photoreactivation ; Dark repair ; Deazaflavin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sensitivity of three methanogenic bacteria towards ultraviolet irradiation was similar to the UV-sensitivity of Escherichia coli. The lethal effects of UV-irradiation in Methanobacterium thermoautotrophicum Marburg and in Methanobacterium thermoautotrophicum ΔH but not in Methanococcus vannielii were reversed by exposure to visible light. In cell suspensions of Methanobacterium thermoautotrophicum that had been irradiated to 0.1% survival, 90% of the UV-caused damage was photorepairable. The in vivo action spectrum for photoreactivation suggests that in this organism a deazaflavin, probably F420, functions as the chromophore of the photoreactivating enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411038
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  • 3
    Electronic Resource
    Electronic Resource
    Book reviews (1987)
    Springer
    Surveys in geophysics 9 (1987), S. 99-104 
    Details
    ISSN: 1573-0956
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01903401
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  • 4
    Electronic Resource
    Electronic Resource
    Prostaglandin Derivative PGBX Improves Neurologic Recovery After Ischemic Spinal Injury (1987)
    Springer
    Pharmaceutical research 4 (1987), S. 130-132 
    Details
    ISSN: 1573-904X
    Keywords: ischemia ; paralysis ; prostaglandins ; spinal cord
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Neurological dysfunction resulting from an ischemic insult in the central nervous system (CNS) is believed to be an indirect outcome of impaired energy production. Recent studies suggest that prostaglandin Bx (PGBx), an oligomer of PGB1 and 15-keto-PGB1, may be beneficial in protecting mitochondrial function after ischemic insults by preventing uncoupling of oxidative phosphorylation. In the present study, PGBx had a significant influence on neurological outcome after ischemic injury in the rabbit spinal cord. These findings suggest that PGBx may be beneficial in the treatment of CNS ischemic injuries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1016466902877
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  • 5
    Electronic Resource
    Electronic Resource
    Direct assay techniques for comprehensive radionuclide quantification of radwaste packages (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 123 (1988), S. 77-106 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Battelle, Pacific Northwest Laboratories has recently developed, tested and field-demonstrated a technology for the direct assay of transuranic radionuclides (TRU), fission products, and activation products in a variety of radwaste packages generated at commercial nuclear power plants. This technology involves non-destructive passive neutron counting for determination of nanocurie/gram quantities of the TRU radionuclides. Direct gamma spectrometry combined with thermoluminescent dosimetry (TLD) and correlation analysis is also utilized to determine the concentrations of the fission and activation products present in the radwaste packages. Employing counting times of 10 to 20 minutes, a complete analysis of all radionuclides specified for assay by the U.S. Nuclear Regulatory Commission (in 10CFR61) prior to shallow-land disposal of commercial radwastes can be measured at concentrations at least tenfold below the least restrictive Class “A” waste catagory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036383
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  • 6
    Electronic Resource
    Electronic Resource
    Sampling of airborne pesticides using Chromosorb 102 (1985)
    Springer
    Bulletin of environmental contamination and toxicology 35 (1985), S. 460-465 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01636538
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  • 7
    Electronic Resource
    Electronic Resource
    Genes for two homologous G-protein α subunits map to different human chromosomes (1987)
    Springer
    Human genetics 〈Berlin〉 77 (1987), S. 259-262 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Signal transduction across biological membranes is modulated by a family of related GTP-binding proteins termed G proteins. These G proteins have a heterotrimeric structure composed of α, β, and γ subunits. The α subunits of the G proteins bind GTP and appear to determine the biochemical specificity of the protein. We have recently cloned and characterized cDNA encoding two G-protein α subunits, αi and αh. The former is a substrate for ADP-ribosylation by pertussis toxin. The protein corresponding to αh has not yet been identified. These cDNAs encode proteins, which demonstrate 90% sequence identity to one another and also show marked similarity to other G proteins. The present studies were designed to determine whether the genes for these related proteins are clustered on a single human chromosome. Genomic DNA isolated from a panel of mouse-human hybrid cell lines was analyzed by hybridization to cDNAs for αi and αh. Based on the distribution patterns of αi and αh in cell hybrids, the gene for αi was assigned to human chromosome 7, and the gene for αh assigned to chromosome 12. These data suggest that the G-protein gene family may be distributed over at least two human chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284481
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  • 8
    Electronic Resource
    Electronic Resource
    Isolation and characterization of the complete human β-myosin heavy chain gene (1989)
    Springer
    Human genetics 〈Berlin〉 81 (1989), S. 214-220 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The entire gene coding for the human β-myosin heavy chain has been isolated from genomic EMBL3A phage libraries by chromosomal walking starting from clone gMHC-1, reported earlier (Appelhans and Vosberg 1983). gMHC-1 has been shown to carry coding information for the C-terminal two-thirds of β-myosin heavy chain, which is expressed in cardiac muscle and in slow skeletal muscle fibers (Lichter et al. 1986). Three DNA clones were identified as overlapping with gMHC-1 by restriction mapping and DNA sequencing. They span a 30-kb region in the genome. About 22 kb extend from the initiation codon ATG to the poly(A) addition site. The clones include about 4 kb of 5′ flanking sequences upstream of the promoter. Comparisons of β- and α-myosin heavy chain sequences indicate that gene duplication of the cardiac myosin heavy chain isogenes preceded the mammalian species differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00278991
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  • 9
    Electronic Resource
    Electronic Resource
    Micronekton and macrozooplankton in the open waters near Antarctic ice edge zones (AMERIEZ 1983 and 1986) (1989)
    Springer
    Polar biology 9 (1989), S. 225-233 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Micronekton and macrozooplankton assemblages (0–1000 m) were sampled from the open ocean in the vicinity of marginal ice zones in the southern Scotia and western Weddell Seas using midwater trawls. Small regional differences in species composition were found in the differing hydrographic settings with the Scotia Sea being slightly more diverse. Most species exhibited broad vertical ranges with no distinct pattern of vertical movement. Exceptions were mesopelagic fish and Salpa thompsoni which undertook diel vertical migrations. Biomass was high (2.4–3.1 g DW/m2), comparable to Pacific subarctic waters. Euphausia superba and Salpa tompsoni were the numerical and biomass dominants, representing over 50% of the total numbers and standing stocks. In terms of biomass, euphausiids were the most important group at shallow depths (0–200 m) but were surpassed by salps in the Scotia Sea and mesopelagic fish in the Weddell Sea when all depths down to 1000 m were considered. Pelagic fish biomass (3.3–4.4 g WW/m2) greatly exceeded published estimates for birds (0.025–0.070 g WW/m2), seals (0.068–0.089 g WW/m2) and whales (0.167 to 0.399 g WW/m2), making mesopelagic fish the most prevalent krill predators in the Antarctic oceanic system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263770
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  • 10
    Electronic Resource
    Electronic Resource
    Leaf senescence in a non-yellowing mutant of Festuca pratensis: Proteins of photosystem II (1989)
    Springer
    Planta 177 (1989), S. 265-272 
    Details
    ISSN: 1432-2048
    Keywords: Festuca (mutant, senescence) ; Leaf senescence ; Light-harvesting chlorophyll a/b-binding protein ; Mutant (Festuca) ; Photosystem II ; Protein turnover (photosystem II) ; Senescence (leaf)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The senescence of leaves is characterized by yellowing as chlorophyll pigments are degraded. Proteins of the chloroplasts also decline during this phase of development. There exists a non-yellowing mutant genotype of Festuca pratensis Huds. which does not suffer a loss of chlorophyll during senescence. The fate of chloroplast membrane proteins was studied in mutant and wild-type plants by immune blotting and immuno-electron microscopy. Intrinsic proteins of photosystem II, exemplified by the light-harvesting chlorophyll a/b-binding protein (LHCP-2) and D1, were shown to be unusually stable in the mutant during senescence, whereas the extrinsic 33-kilodalton protein of the oxygen-evolving complex was equally lable in both genotypes. An ultrastructural study revealed that while the intrinsic proteins remained in the internal membranes of the chloroplasts, they ceased to display the heterogenous lateral distribution within the lamellae which was characteristic of nonsenescent chloroplasts. These observations are discussed in the light of possible mechanisms of protein turnover in chloroplasts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392815
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