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  • 1
    Electronic Resource
    Electronic Resource
    Nodulation of Trifolium repens at low pH by single and paired strains of Rhizobium leguminosarum biovar trifolii (1997)
    Springer
    Archives of microbiology 168 (1997), S. 193-198 
    Details
    ISSN: 1432-072X
    Keywords: Key words Competition ; Nodulation ; Rhizobium ; leguminosarum bv. trifolii ; Trifolium repens ; Acidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Detailed individual nodulation profiles were obtained for five strains of Rhizobium leguminosarum biovar trifolii inoculated onto roots of Trifolium repens seedlings growing on an agar medium of pH 4.5. The time of appearance and the location of every nodule were noted for a period of 10 days after inoculation. Using these nodulation frequency profiles, pairings of strains were identified and six mixed-strain inoculation (1:1 ratio) experiments were subsequently performed at pH 4.5. Results from the mixed-inoculum experiments showed that the performance of a Rhizobium strain in single culture could not be reliably used to predict the outcome of a paired-inoculation study and that some seedlings were exclusively nodulated by rhizobia that performed poorly at low pH in single-culture inoculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050487
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  • 2
    Electronic Resource
    Electronic Resource
    The application of molecular markers to the study and conservation of fish populations, with special reference to Salmo (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 47 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The main molecular techniques which can be used to generate genetic markers, and the applications of these markers to studies of fish populations are outlined. Published and ongoing studies, in the authors' laboratories, on brown trout and Atlantic salmon are used to compare the resolution and applicability of allozyme, mitochondrial DNA and minisatellite (variable number of tandem repeats) markers for studies on population structuring, genetic variation within populations, and the impact of the accidental and deliberate introduction of non-native salmonids on the genetic make-up of natural populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb06048.x
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  • 3
    Electronic Resource
    Electronic Resource
    The neutron transmission of single-crystal sapphire filters (1993)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 26 (1993), S. 438-447 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The wavelength dependence of the transmission probability of a beam of neutrons through super optical quality single-crystal sapphire at room temperature has been measured. The measurements extend over the neutron wavelength range 0.05–1.2 nm. Sharp dips in the transmission caused by Bragg reflection are not found. The data below the dip around 0.2 nm in the cross section have been fitted to a function that accounts for multiphonon scattering. Measurements performed on single crystals with increased lattice distortion (or mosaic spread) show an increase in the cross section at long wavelengths. The attenuation of room-temperature Al2O3 is not significantly different from that for liquid-nitrogen-cooled MgO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889893000433
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  • 4
    Electronic Resource
    Electronic Resource
    A computational method for quasi-static fracture (1998)
    Springer
    Computational mechanics 22 (1998), S. 203-210 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A direct method for solving quasi-static, mixed-mode fracture problems is presented. The element-free Galerkin method is used in order to allow for crack growth without remeshing. An expression for the normalized, critical traction is derived in terms of the fracture resistance (R-curve) and a crack-dependent function. Sample problems demonstrate the capability of this method to accurately compute the post-peak equilibrium paths for structures with growing cracks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050354
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  • 5
    Electronic Resource
    Electronic Resource
    Neutron captue prompt gamma-ray activation analysis at the NIST Cold Neutron Research Facility (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 167 (1993), S. 121-126 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An instrument for neutron capture prompt gamma-ray activation analysis (PGAA) has been constructed as part of the Cold Neutron Research Facility at the 20 MW National Institute of Standards and Technology Research Reactor. The neutron fluence rate (thermal equivalent) is 1.5·108 n ·cm−2·s−1, with negligible fast neutrons and gamma-rays. With compact geometry and hydrogen-free construction, the sensitivity is sevenfold better than an existing thermal instrument. Hydrogen background is thirtyfold lower.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035470
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  • 6
    Electronic Resource
    Electronic Resource
    Multimedia encyclopedia of nuclear science (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 219 (1997), S. 221-230 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We are developing a multimedia encyclopedia that provides a framework for students to leam nuclear science. A variety of media formats are used to present concepts, including text, static figures, animations, and video. Two special prsentation formats use dynamically produced simulations to expose students to nuclear science relationships. These media types provide greater interactivity and flexibility than simple animations. Students access information through tutorials, a dictionary of nuclear science terms, biographies of notable scientists, and a timeline of nuclear science history. The tutorial organization emphasizes the interrelationships among topics. We present an overview of the encyclopedia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038504
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  • 7
    Electronic Resource
    Electronic Resource
    Nuclear science programs at San Jose State University (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 171 (1993), S. 167-175 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract San Jose State University provides undergraduate, graduate, and outreach programs in nuclear science education that are unique in this country and perhaps in the world. A dedicated Nuclear Science Facility, specifically designed and equipped for undergraduate and graduate nuclear science laboratory work, is a key resource that helps make these programs possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039684
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  • 8
    Electronic Resource
    Electronic Resource
    Nuclear science summer school for high school students (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 219 (1997), S. 237-239 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We have developed a two-week summer lecture and laboratory course that introduces high school students to concepts in nuclear science. The program has operated at the San Jose State University Nuclear Science Facility for two years. Experienced high school science teachers run the summer school, assisted by other science teachers. Students consider the program to be effective. Its popularity is shown by numerous requests for reservations and the necessity to offer multiple sections in 1997. *** DIRECT SUPPORT *** A0553010 00006
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038506
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  • 9
    Electronic Resource
    Electronic Resource
    Electronic laboratories for nuclear science education (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 219 (1997), S. 251-255 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We are developing electronic laboratories to help introduce students to nuclear science. An electronic laboratory is a collection of computer simulations of nuclear science experiments. Each program allows students to set experimental parameters, collect data, and analyze results. Experiments can easily be repeated because the computer can compress time. Electronic laboratories are useful for schools with existing nuclear science programs because they can prepare students for actual laboratory work. They are also useful for schools without specialized facilities, since they give students an empirical understanding of nuclear science but do not require specialized equipment. We present three electronic experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038509
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  • 10
    Electronic Resource
    Electronic Resource
    Association between feral pig disturbance and the composition of some alien plant assemblages in Hawaii Volcanoes National Park (1991)
    Springer
    Plant ecology 95 (1991), S. 55-62 
    Details
    ISSN: 1573-5052
    Keywords: Alien plants ; Hawaii ; Soil disturbance ; Sus scrofa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Association analysis was used to assess relationships among 25 important alien plant species and their association with feral pig rooting in Hawaii Volcanoes National Park, Hawaii, U.S.A. Results of the association analysis were summarized by means of a simplified, rank-based, polar ordination which yielded three subjective species assemblages. One group was characterized by an association with the endpoint species, Ehrharta stipoides. A second group consisted of species associated with the other endpoint species, Andropogon virginicus. The third group comprised a diverse assemblage of 14 species in the middle of the ordination. Comparison of ordination scores with each species's association with pig-induced soil disturbance revealed that members of the Ehrharta group were strongly positively associated with pig activity, whereas members of the Andropogon group were generally negatively associated. The third group showed no association with pig-induced soil disturbance. These results suggest a strong relationship between feral pig activity and the composition of the alien portion of the plant community. Analysis of the ecologies of both plants and pigs suggests that some species may both encourage pig activity and benefit from it. Likewise, other alien plants appear to neither require nor benefit from pig-induced soil disturbance. While pigs appear to play an important role in the organization of these communities, their removal may have a negligible impact on the success of many of the common weeds in the area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00124953
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