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  • Springer  (1,317)
  • Institute of Physics  (425)
  • American Chemical Society (ACS)  (104)
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Years
  • 11
    Electronic Resource
    Electronic Resource
    A global formulation of the condition for a curve to lie in a sphere (1963)
    Springer
    Monatshefte für Mathematik 67 (1963), S. 363-365 
    Details
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01299587
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  • 12
    Electronic Resource
    Electronic Resource
    Two dimensional linear connexions with zero torsion and recurrent curvature (1964)
    Springer
    Monatshefte für Mathematik 68 (1964), S. 175-184 
    Details
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307120
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  • 13
    Electronic Resource
    Electronic Resource
    Remarks on maximal left ideals in semigroups (1976)
    Springer
    Monatshefte für Mathematik 81 (1976), S. 257-260 
    Details
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Some similar results to those for maximal (two-sided) ideals in a compact semigroupS are obtained for maximal left ideals inS, with one exception i.e. the intersection of all maximal left ideals inS may be empty. The maximal left ideals in the convolution semigroup of measures onS are also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387752
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  • 14
    Electronic Resource
    Electronic Resource
    Long Exposure Growth of In-Vivo Interstitial Laser Photocoagulation Lesions (1999)
    Springer
    Lasers in medical science 14 (1999), S. 297-306 
    Details
    ISSN: 1435-604X
    Keywords: Keywords: Bioheat transfer equation; ILP; In vivo; LITT; Photocoagulation; Rate kinetics; Temperature distribution; Thermal lesion size; Thermotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract . An investigation of the temperature response and growth of thermal lesions resulting from in vivo, interstitial laser photocoagulation at long exposures was conducted to assess extended lesion growth characteristics and test the applicability of first order unimolecular rate kinetics (Arrhenius theory) to thermal lesion growth. Irradiations were performed in vivo in rabbit muscle using a continuous 805 nm diode laser source operating at 1.0 W coupled to an optical fibre with a precharred tip (i.e. point heat source). Temperature responses were measured using a linear array of five microthermocouples. Each temperature–time profile was fitted to a solution of the Weinbaum–Jiji bioheat transfer equation (W–J BHTE). Lesions were resected 48 h post-irradiation and the necrosis boundaries were determined histologically. Numerical integration of the Arrhenius damage integral using temperature–time data at the lesion boundary produced corresponding pairs of activation energy and pre-exponential factor (E a, α) consistent with reported values for various other end-points and tissue types. Lesion radii were 6.0±0.6, 8.7±0.4 and 9.7±0.5 mm for 10, 20 and 30 min irradiations respectively. Thermal lesion growth predicted from Arrhenius theory was consistent with experimental results and is non-asymptotic by 30 min. Thermal parameters generally assumed to be constant when solving the W–J BHTE were found to vary with radial distance from the source, presumably due to a temperature dependence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101030050097
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  • 15
    Electronic Resource
    Electronic Resource
    Discrimination between Atlantic and Pacific Subspecies of Northern Bluefin Tuna (Thunnus thynnus) by Magnetic-Capture Hybridization Using Bacterial Magnetic Particles (2000)
    Springer
    Marine biotechnology 2 (2000), S. 309-313 
    Details
    ISSN: 1436-2236
    Keywords: Key words: tuna species identification, mtDNA, northern bluefin tuna, bacterial magnetic particles, magnetic-capture hybridization.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract: The previously developed magnetic-capture hybridization technique employing bacterial magnetic particles was applied to discriminate between Atlantic and Pacific subspecies of the northern bluefin tuna (Thunnus thynnus) using specific DNA sequences. Nucleotide sequences of a 925-bp fragment (ATCO) flanking the mitochondrial ATPase and cytochrome oxidase subunit III genes in these two subspecies were compared. Two regions having single-nucleotide and three-nucleotide differences between the subspecies were adopted to design DNA probes (NR1, 21-mer; NR2, 29-mer), and two internal primer sets were designed to amplify DNA fragments containing these regions. The DNA probes were immobilized on bacterial magnetic particles via streptavidin-biotin conjugation and subjected to magnetic-capture hybridization with the digoxigenin-labeled fragments amplified using the internal primers. The luminescence intensities of DNA on bacterial magnetic particles obtained by hybridization between the probes and the complementary fragments were higher than those obtained by hybridization with noncomplementary fragments. These data suggest that this system employing DNA on bacterial magnetic particles may be useful for discrimination of these two subspecies by recognizing a single-nucleotide difference.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10126000010
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  • 16
    Electronic Resource
    Electronic Resource
    Ring-opening spontaneous alternating copolymerization of a dithiadiphosphetane disulfide with cyclic ethers (1983)
    Springer
    Polymer bulletin 10 (1983), S. 491-496 
    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 Alternating copolymerizations of 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide(Lawesson's reagent, LR) with some cyclic ethers(1) are described. The cyclic ethers used were ethylene oxide (EO) and oxetane (OX). The copolymerization took place without catalyst at room temperature. The copolymers obtained were of phosphonodithioate structure (2) having 1/2∶1 composition of LR and 1. The present copolymerization is the first example of the 1/2∶1 composition in an alternating arrangement. The copolymerization mechanism has been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285366
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  • 17
    Electronic Resource
    Electronic Resource
    Laser assisted microvascular anastomoses: A histological study (1990)
    Springer
    Lasers in medical science 5 (1990), S. 281-287 
    Details
    ISSN: 1435-604X
    Keywords: Laser ; Anastomosis ; Aneurysm ; Microsurgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract Laser assisted microvascular anastomosis (LAMA) was performed on rat femoral arteries anddd veins using a milliwatt CO2 laser. The histological appearance of the anastomoses was assessed immediately after the procedure and at regular intervals up to seven months. There was extensive thermal-induced transmural necrosis. The weld at the anastomosis was shown to comprise of fibrin, which later organized into fibrous tissue. Re-endothelialization occurred earlier in veins, and the endothelial nature of the surface cells was confirmed by factor VIII-related antigen positivity by the avidin-biotin peroxidase complex technique. Healing was complete by 9 weeks, but the vessel was not reconstituted to its normal appearance. At the site of the anastomosis 20% of the vessels had false aneurysms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02032655
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  • 18
    Electronic Resource
    Electronic Resource
    Effects of wax bloom variation in Brassica oleracea on foraging by a vespid wasp (2000)
    Springer
    Entomologia experimentalis et applicata 97 (2000), S. 161-166 
    Details
    ISSN: 1570-7458
    Keywords: surface waxes ; plant waxes ; predation ; tritrophic interactions ; attachment ; Polistes dominulus ; behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Foraging by individual Polistes dominulus (Christ) (Hymenoptera: Vespidae) was observed and compared on Brassica oleracea L. plants that differed in surface wax bloom. Twenty-six wasps, previously trained to forage on plants for 4th instar Trichoplusia ni (Walker), were presented in the greenhouse with mixtures of plants with normal wax bloom or genetically reduced wax bloom, and on which T. ni caterpillars had been placed. During foraging, the wasps were observed to slip significantly more frequently from the leaf surfaces of normal-wax bloom plants than from reduced-wax bloom plants (129 vs 63 occurrences) and to retrieve significantly fewer pieces of caterpillar after attack on normal-wax bloom plants (151 vs 223 pieces). Altogether the wasps retrieved 333 caterpillar pieces from reduced-wax bloom plants and 248 pieces from normal-wax bloom plants. Despite these differences, the number of caterpillars attacked and killed did not differ between the two wax bloom types (116 vs 121), nor did handling time for individual attacks (time from contact with prey until prey piece was carried to the nest) (170±12.5 s vs 180±10.5 s). Thus, in contrast with previous reports for smaller predators, wax bloom variation in B. oleracea did not influence the effectiveness of P. dominulus as a predator of T. ni.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004051823556
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  • 19
    Electronic Resource
    Electronic Resource
    Influence of host distribution on foraging behaviour in the hyperparasitoid wasp, Dendrocerus carpenteri (2000)
    Springer
    Entomologia experimentalis et applicata 97 (2000), S. 57-66 
    Details
    ISSN: 1570-7458
    Keywords: aphid ; hyperparasitioid ; foraging behaviour ; Dendrocerus ; Ephedrus ; Aphidiinae ; mummification site ; host distribution ; host density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The foraging behaviour of Dendrocerus carpenteriCurtis (Hymenoptera: Megaspilidae), an ectophagous hyperparasitoid of aphidiine wasps inside mummified aphids, was examined in the laboratory with an experimental system consisting of broad bean, Vicia fabaL, the pea aphid, Acyrthosiphon pisumHarris, and a primary parasitoid, Ephedrus californicusBaker. Pea aphids parasitised by E. californicusoften disperse from their feeding sites (or off host plants) before dying and mummifying. Response of female hyperparasitoids to host distribution was evaluated at two spatial scales. At the first scale, behaviour of hyperparasitoids was examined on individual plants with different densities of hosts. At the second scale, habitat complexity and host location were manipulated in large foraging cages containing several plants. I show that patterns of density-dependent hyperparasitism can result from the foraging behaviour of D. carpenteri. However, dispersal of parasitised aphids may not reduce the incidence of hyperparasitism if hyperparasitoids systematically search the habitat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004099401130
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  • 20
    Electronic Resource
    Electronic Resource
    Microscopic modelling of bulk and quantum-well GaAs-based semiconductor lasers (1993)
    Springer
    Optical and quantum electronics 25 (1993), S. 675-693 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The dynamical behaviour of Fabry-Perot type semiconductor lasers is modelled, including the relevant many-body Coulomb effects of the excited carriers. Conditions are given under which a parametrization of the full model is possible, allowing simple analytic relations for local gain, refractive index and linewidth enhancement factor. The parameters of the simplified model are uniquely determined by the microscopic theory and have to be optimized for the respective operating conditions. The theory is evaluated for bulk and quantum-well GaAs active material and a variety of laser structures, including strongly and weakly index-guided structures, as well as purely guided single-and twin-stripe lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430557
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