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  • 1
    Electronic Resource
    Electronic Resource
    Coimplantation of silver and halogens in thin SiO2 films (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 3915-3920 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silver and halogens, Br and Cl, were coimplanted into thin SiO2 films sandwiched on a field-effect structure. Compositional depth distribution and chemical states of the implants were measured by means of Auger electron spectroscopy and x-ray photoelectron spectroscopy. Ion sensitivity of the surface layer was measured using a capacitive field-effect structure, electrolyte–insulator– semiconductor. Silver halides were found to be incorporated in SiO2 in addition to metallic silver. The distribution of the implanted silver sensitively responds to the reactive halogens subsequently implanted into a silver-containing surface. The solid phase of silver halides with a concentration of less than 10 at. % delivers a distinct ion sensing characteristic toward halide ions in an electrolyte solution, comparable to that of bulk material. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361817
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  • 2
    Electronic Resource
    Electronic Resource
    Implications for Reactor Safety of the Accident at Three Mile Island, Unit 2 (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 6 (1981), S. 43-88 
    Details
    ISSN: 0362-1626
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.eg.06.110181.000355
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  • 3
    Electronic Resource
    Electronic Resource
    Laboratory Studies on Removal of Plutonium from Laundry Wastes (1951)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 43 (1951), S. 1516-1519 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50499a019
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  • 4
    Electronic Resource
    Electronic Resource
    The Effect of Stunning Methods on Rigor Mortis and Texture Properties of Atlantic Salmon (Salmo Salar) (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Shear force and rigor mortis were used to evaluate the post-mortem changes of muscle texture in Atlantic salmon (Salmo salar). The fish were either stunned with carbon dioxide (CO2), electricity, or percussion prior to slaughter. The pre-mortem stress during CO2 stunning resulted in an earlier onset and resolution of rigor mortis, and accelerated post-mortem softening of the muscle tissue as compared to the other stunning methods. No significant differences, either in development of rigor mortis or shear force, were seen between fish that were stunned with electricity or by percussion. Consequently electricity can be used for stunning fish prior to slaughter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb10306.x
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  • 5
    Electronic Resource
    Electronic Resource
    Genetic relationships among Native American maize accessions of the Great Plains assessed by RAPDs (1999)
    Springer
    Theoretical and applied genetics 99 (1999), S. 1061-1067 
    Details
    ISSN: 1432-2242
    Keywords: Key words Native American maize ; RAPD ; Genetic relationships ; Reproducibility ; Geography and evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Genetic variation among 15 accessions of Native American maize from the Great Plains was investigated using random amplified polymorphic DNA (RAPD). RAPDs revealed very high levels of polymorphism among accessions. Banding patterns ranged in percentage polymorphism from 46.7% to 86.2% with an overall mean of 70.7% for the primers analyzed. The construction of genetic relationships using cluster analysis and principal coordinates analysis revealed that RAPDs are successful in confirming hypothesized relationships and in identifying misclassified specimens. Furthermore, the phenogram fails to reveal a strong correspondence between genetic relationships and the geographical position of Native Americans prior to contact. This provides support for the hypothesis that multiple introductions of maize into the Great Plains via trade may have resulted in the great morphological variation found among accessions in the region. Based on these data, it is unlikely that a separate Great Plains race of maize can be distinguished. In general, we conclude that RAPDs are potentially very useful in organizing seed collections and understanding intraspecific genetic differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051415
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  • 6
    Electronic Resource
    Electronic Resource
    Regime of the Filchner–Ronne ice shelves, Antarctica (1983)
    [s.l.] : Nature Publishing Group
    Nature 302 (1983), S. 582-586 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Seismic, radio-echo, TWERLE balloon and oceanographic data of the Filchner-Ronne ice shelves are analysed. A large thin area in the central Ronne Ice Shelf is found to differ from the morphology of the Ross and Filchner ice shelves. This area is partly filled by basal saline ice, which can be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/302582a0
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  • 7
    Electronic Resource
    Electronic Resource
    Investigations of ground-based clouds at the Mt. Brocken (1998)
    Springer
    Fresenius' journal of analytical chemistry 361 (1998), S. 59-64 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Results of the 1996 field season (April-November) of the cloud chemistry program starting in 1992 at the Mt. Brocken are presented. The mountain site (1142 m a.s.l.) is located in the Harz Mountains/Germany. For a large part of the database (about 40%), both cloud water and drizzle and/or precipitation were present at the same time. A separation into two groups was done: non-precipitating clouds and mixed category of events. More than 2000 one hour samples were collected and analysed for major ions. The mean cloud water pH for the frostfree period in 1996 was 3.9. Histograms giving the distribution of pH values show that the pH values of samples from non-precipitating clouds ranges from 2.5 up to values 〉 8 and that the distribution is bimodale. For the 1996 field season period as a whole, pH values of cloud water were lower than those of mixed samples (cloud water, drizzle, precipitation) at the Brocken site. This was related to higher concentrations of all ions in cloud water. Cloud base measurements using a ceilometer confirmed the correlation between liquid water content and height above cloud base and consequently the influence of sampling height relative to the cloud base on the total ionic content of cloud water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050834
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  • 8
    Electronic Resource
    Electronic Resource
    Acetate oxidation to CO2 via a citric acid cycle involving an ATP-citrate lyase: a mechanism for the synthesis of ATP via substrate level phosphorylation in Desulfobacter postgatei growing on acetate and sulfate (1987)
    Springer
    Archives of microbiology 148 (1987), S. 202-207 
    Details
    ISSN: 1432-072X
    Keywords: ATP-citrate lyase ; Citric acid cycle ; Acetate oxidation ; ATP synthesis via substrate level phosphorylation ; Sulfate-reducing bacteria ; Desulfobacter postgatei
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Desulfobacter postgatei is an acetate-oxidizing, sulfate-reducing bacterium that metabolizes acetate via the citric acid cycle. The organism has been reported to contain a si-citrate synthase (EC 4.1.3.7) which is activated by AMP and inorganic phosphate. It is show now, that the enzyme mediating citrate formation is an ATP-citrate lyase (EC 4.1.3.8) rather than a citrate synthase. Cell extracts (160,000xg supernatant) catalyzed the conversion of oxaloacetate (apparent K m=0.2 mM), acetyl-CoA (app. K m=0.1 mM), ADP (app. K m=0.06 mM) and phosphate (app. K m=0.7 mM) to citrate, CoA and ATP with a specific activity of 0.3 μmol·min-1·mg-1 protein. Per mol citrate formed 1 mol of ATP was generated. Cleavage of citrate (app. K m=0.05 mM; V max=1.2 μmol · min-1 · mg-1 protein) was dependent on ATP (app. K m=0.4 mM) and CoA (app. K m=0.05 mM) and yielded oxaloacetate, acetyl-CoA, ADP, and phosphate as products in a stoichiometry of citrate:CoA:oxaloacetate:ADP=1:1:1:1. The use of an ATP-citrate lyase in the citric acid cycle enables D. postgatei to couple the oxidation of acetate to 2 CO2 with the net synthesis of ATP via substrate level phosphorylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414812
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  • 9
    Electronic Resource
    Electronic Resource
    Cloud chemistry effects on tropospheric photooxidants in polluted atmosphere — Model results (1992)
    Springer
    Journal of atmospheric chemistry 14 (1992), S. 153-165 
    Details
    ISSN: 1573-0662
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The mathematical model presented in this paper describes in detail the gas-phase chemistry (22 reactions), gas-phase/liquid-phase equilibrium (18 equilibria) and liquid-phase chemistry (57 reactions and equilibria) in a stratiform cloud system. The model is used to analyze the influence of the liquid phase on the photooxidant formation and destruction for different gaseous SO2 concentrations with and without consideration of organic aqueous phase chemistry. It has been shown that for [SO2]〉1 ppb the cloud is quantitatively a sink for H2O2, OH, HO2 and O3. The ozon destruction via O3+O2 -, which is most important in remote areas, is in polluted areas only significant at summer days. The role of organic components in cloud water consists in the transformation OH → HO2 where HO2 is further transformed into H2O2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00115231
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  • 10
    Electronic Resource
    Electronic Resource
    Evidence of ozone destruction in clouds (1995)
    Springer
    Naturwissenschaften 82 (1995), S. 86-89 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01140147
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