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  • Springer  (122)
  • Nature Publishing Group  (8)
  • 2020-2021
  • 2000-2004  (50)
  • 1995-1999  (75)
  • 1960-1964  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Identification and characterization of rod-derived cone viability factor (2004)
    [s.l.] : Nature Publishing Group
    Nature genetics 36 (2004), S. 755-759 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Retinitis pigmentosa is an untreatable, inherited retinal disease that leads to blindness. The disease initiates with the loss of night vision due to rod photoreceptor degeneration, followed by irreversible, progressive loss of cone photoreceptor. Cone loss is responsible for the main visual ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng1386
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of in utero Incubation on the Metabolism of Rabbit Spermatozoa (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 943-944 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. OXYGEN UPTAKE, GLUCOSE UTILIZATION AND LACTATE PRODUCTION OF FRESH AND in utero INCUBATED SPERM (Sperm counts/flask: 5-88 x 108-7-37 x 108 for fresh sperm and 1-68 x 108-2-44 x 108 for in utero incubated sperm) O2 uptake (//in. mole/ 10' sperm) ~ ' ~ . " . Exp. At the end of Fresh ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201943a0
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  • 3
    Electronic Resource
    Electronic Resource
    Geoarchaeology (Communication arising) Did Nile flooding sink two ancient cities? (2002)
    [s.l.] : Nature Publishing Group
    Nature 415 (2002), S. 37-38 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The discovery of the two cities of Herakleion and East Canopus under the waters of the Bay of Abu Qir (east of Alexandria, Egypt) stirred worldwide attention when it was first announced in the summer of 2000. Their disappearance some 1,250 years ago has been ascribed by Stanley, Goddio and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/415037a
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  • 4
    Electronic Resource
    Electronic Resource
    Fracture Healing by Vitamin K (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 849-849 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Adult male and female rabbits and rats were used in this study. Complete transverse fractures of the left tibia were produced by an open operation under ether anassthesia. In the case of rabbits intra-medullary pins were used to fix the fractured ends of the bone. In rats the fractures were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185849a0
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  • 5
    Electronic Resource
    Electronic Resource
    Miscibility of poly(α-methyl styrene-co-methacrylic acid) with alkyl methacrylate-co-4-vinylpyridine copolymers (1995)
    Springer
    Polymer bulletin 34 (1995), S. 485-491 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The miscibility of blends of poly(α-methyl styrene-co-methacrylic acid) (PαMSMA) with various alkyl methacrylate polymers or poly(alkyl methacrylate-co-4-vinylpyridine) was studied by differential scanning calorimetry and Fourier transform infra red spectroscopy. PαMSMA is immiscible with poly(methyl methacrylate), poly(ethyl methacrylate) and poly(n-butyl methacrylate). The introduction of 4-vinylpyridine by random free radical copolymerization within these alkyl methacrylate polymer chains enhanced the miscibility of these copolymers with PαMSMA as a result of specific interactions that occurred between the carboxylic and pyridine groups, evidenced from the significant changes observed by FTIR in the carboxyl and pyridine ring regions. The density of interacting groups required for miscible blends depends on the size of the pendant group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306244
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  • 6
    Electronic Resource
    Electronic Resource
    Three-Photon Absorption in InAs (1998)
    Springer
    Optical and quantum electronics 30 (1998), S. 193-200 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Using 125 ps laser pulses, we observe three-photon absorption in room temperature InAs at a wavelength of 9.54 µm. This effect is readily identified by temperature-tuning the semiconductor bandgap through the three-photon absorption edge. A three-photon absorption coefficient of K3 = 1 ± 0.6 × 10-3 cm3 MW-2 is extracted from non-linear absorption data obtained with an open-aperture Z-scan. Time-resolved measurement at high irradiance reveals an increase of absorption due to hot carriers. We also present an autocorrelation measurement of our CO2 laser pulse that shows two complete optical free-induction-decay cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006962228937
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  • 7
    Electronic Resource
    Electronic Resource
    A heptacoordinated mononuclear diphenylantimony carboxylate (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 1103-1106 
    Details
    ISSN: 1572-8854
    Keywords: antimony(V) ; mononuclear carboxylate ; heptacoordinated, structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The X-ray structure of a novel mononuclear heptacoordinated compound chlorodiphenylantimony(V) bis(2-methyl benzoate), SbPh2CI(O2C—2—Me—C6H4)2 is described. Crystal data are: Monoclinic, P21/c, a = 8.791(3), b = 21.687(3), c = 13.488(4) Å, β = 103.78(2)°, and Z = 4. A distorted pentagonal bipyramidal geometry for antimony with both the carboxylates chelating is found in the solid state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009505724312
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  • 8
    Electronic Resource
    Electronic Resource
    Temporal Constraint Satisfaction Techniques in Job Shop Scheduling Problem Solving (1998)
    Springer
    Constraints 3 (1998), S. 203-211 
    Details
    ISSN: 1572-9354
    Keywords: temporal constraint satisfaction ; job shop scheduling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract We describe a restriction of Dechter, Meiri and Pearl's TCSPs (Temporal Constraint Satisfaction Problems) sufficiently expressive to represent any job shop scheduling problem. A solver based on the restriction is then described, which is similar to Ladkin and Reinefeld's qualitative interval network solver; except, however, that the filtering method used during the search is not path consistency but either ULT (Upper-Lower Tightening) or LPC (Loose Path- Consistency), which are both less effective but have the advantage of getting rid of the so-called “fragmentation problem”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009777711218
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  • 9
    Electronic Resource
    Electronic Resource
    A Tabu Search Approach for the Resource Constrained Project Scheduling Problem (1998)
    Springer
    Journal of heuristics 4 (1998), S. 123-139 
    Details
    ISSN: 1572-9397
    Keywords: project management ; limited resources ; tabu search
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract An appropriate tabu search implementation is designed to solve the resource constrained project scheduling problem. This approach uses well defined move strategies and a structured neighbourhood, defines appropriate tabu status and tenure and takes account of objective function approximation to speed up the search process. A sound understanding of the problem has helped in many ways in designing and enhancing the tabu search methodology. The method uses diversification, intensification and handles infeasibility via strategic oscillation. The above methodology is tested on existing problems from the literature and also on parametrically generated problems with encouraging results. For comparison of results, optimal solutions are used in the former and lower bounds obtained by Lagrangian heuristics are used in the latter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009673512884
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  • 10
    Electronic Resource
    Electronic Resource
    Radical polymerization and copolymerization behavior of 1-cyanoethanoyl-4-acryloylthiosemicarbzide (2000)
    Springer
    Journal of polymer research 7 (2000), S. 229-235 
    Details
    ISSN: 1572-8935
    Keywords: Functional monomers ; Polymerization ; Copolymerization ; Kinetic studies ; Reactivity ratios
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract 1-Cyanoethanoyl-4-acryloylthiosemicarbazide (CEATS) was synthesized for the first time as a new chelating monomer. Its structure was confirmed by both elemental and spectral analyses. Radical polymerization and copolymerization of CEATS was been carried out in dimethylformamide (DMF) in the presence of azobisisobutyronitrile (AIBN) as an initiator. Kinetic studies for the polymerization behavior of CEATS were performed. The complex formation of the CEATS monomer and polymer (PCEATS) with Cu II cation was investigated and its stability constant determined. The rate of copolymerization of CEATS with some conventional monomers, namely vinyl acetate, methyl methacrylate and acrylonitrile, was measured as a function of the mole fraction of the monomers. The reactivity ratios (r1, r2) for the various copolymer systems investigated together with the Q and e values of the CEATS monomer were determined. Moreover, the thermal gravimetric analysis of the prepared polymers and their copolymers with acrylonitrile were also studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10965-006-0124-x
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