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  • Articles  (14)
  • Chemistry and Pharmacology  (10)
  • Process Engineering, Biotechnology, Nutrition Technology  (7)
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  • Articles  (14)
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  • 1
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    2.8 million years of Arctic climate change from Lake El'gygytgyn, NE Russia (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-06-23
    Description: The reliability of Arctic climate predictions is currently hampered by insufficient knowledge of natural climate variability in the past. A sediment core from Lake El'gygytgyn in northeastern (NE) Russia provides a continuous, high-resolution record from the Arctic, spanning the past 2.8 million years. This core reveals numerous "super interglacials" during the Quaternary; for marine benthic isotope stages (MIS) 11c and 31, maximum summer temperatures and annual precipitation values are ~4 degrees to 5 degrees C and ~300 millimeters higher than those of MIS 1 and 5e. Climate simulations show that these extreme warm conditions are difficult to explain with greenhouse gas and astronomical forcing alone, implying the importance of amplifying feedbacks and far field influences. The timing of Arctic warming relative to West Antarctic Ice Sheet retreats implies strong interhemispheric climate connectivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Melles, Martin -- Brigham-Grette, Julie -- Minyuk, Pavel S -- Nowaczyk, Norbert R -- Wennrich, Volker -- DeConto, Robert M -- Anderson, Patricia M -- Andreev, Andrei A -- Coletti, Anthony -- Cook, Timothy L -- Haltia-Hovi, Eeva -- Kukkonen, Maaret -- Lozhkin, Anatoli V -- Rosen, Peter -- Tarasov, Pavel -- Vogel, Hendrik -- Wagner, Bernd -- New York, N.Y. -- Science. 2012 Jul 20;337(6092):315-20. doi: 10.1126/science.1222135. Epub 2012 Jun 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Geology and Mineralogy, University of Cologne, Zuelpicher Strasse 49a, D-50674 Cologne, Germany. mmelles@uni-koeln.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22722254" target="_blank"〉PubMed〈/a〉
    Keywords: Arctic Regions ; *Climate Change ; *Cold Climate ; Geologic Sediments ; Ice Cover ; *Lakes ; Radiometric Dating ; Russia ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Reactions of stannyl carbamates with organochlorosilanes (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 293-294 
    Details
    ISSN: 1573-9171
    Keywords: stannyl and silyl carbamates.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Rapid and exothermic reactions of stannyl carbamates with organochlorosilanes result in cleavage of the Sn-O-C bond and afford silyl carbamates in a high yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695833
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Reaction of α-(trialkylstannyl) acetylenes with metallic sodium (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 1048-1049 
    Details
    ISSN: 1573-9171
    Keywords: α-(trialkylstannyl)acetylenes, reaction with sodium ; hexaalkyldistannanes ; sodium acetylenides ; trialkylstannyl(trimethylsilyl)acetylenes ; bis(trialkylstannyl)acetylenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract α-Trialkylstannylacetylenes react under mild conditions with metallic sodium at the Sn-C(sp) bond to give hexaalkyldistannanes and sodium acetylalkynides inca. 65–85 % yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558077
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation of fabrics based on high-strength fibres having a high stiffness, and properties of the fabrics (1984)
    Springer
    Fibre chemistry 15 (1984), S. 376-380 
    Details
    ISSN: 1573-8493
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Conclusions New forms of materials and articles from high-strength technical fibres are described, which may be used in rubber technology articles and in reinforced plastics. Difficulties in textile processing of these fibres are caused by theirhigh stiffness and tendency to fibrillation. It is possible to eliminate the difficulties which arise by appropriate choice of the material of the fibre-guiding items, use of lubricating preparations, reduction of yarn tension in textile processing, and selecting the optimum scheme for setting up the weaving loom. The high-strength composite prepared from satin-weave fabric of p-polyamide fibres is characterized by very high indices under extension or bending as compared with fiberglass composites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00548140
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  • 5
    Electronic Resource
    Electronic Resource
    Polymeric composite materials reinforced with aramide fabrics (1990)
    Springer
    Fibre chemistry 22 (1990), S. 367-370 
    Details
    ISSN: 1573-8493
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Conclusions -- Hot-pressed incombustible polymeric materials have been developed which have a low density; these are based on an epoxy or polyimide binder, reinforced with aramide fabrics; these can be used at temperatures up to 473 K. Production of these has been organized in the experimental works of the LenNII “Khimvolokno.” -- A reinforcing material has been developed in the form of the unidirectional OTA-S fabric which consists of SVM tow along the warp and of complex SVM yarn along the fill. The use of tow rather than yarn makes it possible to raise the physicomechanical properties of the organotextolites and to raise the productivity of labor in making them up, and also to reduce costs. -- The organotextolites developed can be used in making up constructional elements in aviation, machine works, shipbuilding, and other branches of technology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00632883
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  • 6
    Electronic Resource
    Electronic Resource
    Catalytic activity of supported palladium catalysts with different dispersities in the hydrogenation and oxidative coupling of styrene (1983)
    Springer
    Reaction kinetics and catalysis letters 23 (1983), S. 381-386 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Исследовано влияние дисперсности нанесенного палладия на каталитическую активность в реакциях гидрирования и окислительной димеризации стирола. Обнаруженное влияние дисперсности на реакцию окислительной димеризации обясняется влиянием дисперсности палладия на адсорбцию кислорода.
    Notes: Abstract The effect of dispersity of supported palladium catalysts on the catalytic activity for hydrogenation and oxidative coupling of styrene has been studied. Changes in the catalytic activity for oxidative coupling are interpreted in terms of the dependence of oxygen adsorption on metal dispersity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02065594
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of molybdena on the activity and dispersity of supported palladium catalysts for liquid phase hydrogenation (1983)
    Springer
    Reaction kinetics and catalysis letters 22 (1983), S. 165-169 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Исполъеование MoO3 в качестве модифицирующего агента при получении нанесенных палладиевых катализаторов ведет к повышению дисперсности металлического палладия вследствие более равномерного распределения первоначально нанесенной соли (PdCl2). Он повышает адсорбционную способность поверхности металла к реагирующему олефину (стирол) и понижает ее к водороду за счет электроно-акцепторного влияния молибденовых ионов.
    Notes: Abstract Increase in dispersity of supported plladium was found in the presence of MoO3 due to a more even distribution of the precursor (PdCl2). It was observed that the metal-support interaction leads to a considerable increase of styrene adsorption and decrease of hydrogen adsorption under the influence of electron-acceptor molybdena ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064826
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  • 8
    Electronic Resource
    Electronic Resource
    Some features in processing carbon yarns and tows into woven fillers (1992)
    Springer
    Fibre chemistry 23 (1992), S. 244-245 
    Details
    ISSN: 1573-8493
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Conclusions -- Processing carbon yarns of types “Ural-N” and UKN requires modernization of the weaving equipment. -- It is necessary to reduce the speed regime for all technological transitions. -- All the yarn-guiding elements should be made of pyroceram. -- Introduction of the fill-yarn into the orifice is desirably carried out with a punch. -- This structure of the woven filler should aid in maximum realization of the strength of carbon tows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552628
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  • 9
    Electronic Resource
    Electronic Resource
    Nonwoven fibrous materials based on fibriliated aramide fibre (1986)
    Springer
    Fibre chemistry 18 (1986), S. 117-120 
    Details
    ISSN: 1573-8493
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Conclusions For articles from CFM which undergo complex loads, nonwoven fibrous materials based on fibrillated, highly-oriented PHA fibres may be used as reinforcing fillers. Fibrillation of the PHA fibre can be carried out during the process of textile treatment. The strength of CFM based on nonwoven fibrous materials from fibrillated PHA fibre differ only slightly in extension in the lengthwise and crosswise directions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549627
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  • 10
    Electronic Resource
    Electronic Resource
    Oxidation of ethyl mercaptan in the presence of cobalt phthalocyanine on a solid support (1986)
    Springer
    Chemistry and technology of fuels and oils 22 (1986), S. 606-609 
    Details
    ISSN: 1573-8310
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01110474
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