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  • 1
    Electronic Resource
    Electronic Resource
    Developmental change of EEG in rat from 4th to 16th week (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 879-880 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The development of EEG in 8 male rats from 4 to 16 weeks age were studied chronically. Theta band had the highest power at 5–16 weeks. Especially after 11 weeks, theta band presented a signigicantly higher peak than that of 4-week-old. In contrast to this, delta band, which had the highest power at 4 weeks, was markedly decreased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01955125
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  • 2
    Electronic Resource
    Electronic Resource
    Turbulence in the randomly forced, one-dimensional Burgers flow (1975)
    Springer
    Journal of statistical physics 13 (1975), S. 245-272 
    Details
    ISSN: 1572-9613
    Keywords: Random force ; Burgers flow ; characteristic functional equation ; Monte Carlo quadrature ; turbulence ; Fokker-Planck equation ; random walk ; nonlinear instability ; ergodicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The randomly forced, one-dimensional Burgers flow is dealt with by the method of the characteristic functional equation. The time development of the stochastic secondary flow is studied numerically by the Monte Carlo quadrature of the integral representation of solution for two types (white and “red”) of random force fields. A turbulence-like behavior of the flow appears for a supercritical Reynolds number, and its structure is studied in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012841
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  • 3
    Electronic Resource
    Electronic Resource
    Nonlinear response and chaos in semiconductors induced by impact ionization (1989)
    Springer
    Applied physics 48 (1989), S. 111-125 
    Details
    ISSN: 1432-0630
    Keywords: 72.20Ht ; 72.20JV ; 05.45+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A review is given of the nonlinear response and chaos induced by impact ionization of neutral shallow donors, observed in n-GaAs. Two kinds of the observation are described; (i) firing wave instability, and (ii) periodically driven current filament. For the firing wave instability, several important aspects are discussed including the selective excitation of the current filaments and the deterministic nature of the firing density wave. The nonlinear response of a periodically driven current filament has been investigated by applying a dc+ac bias of the form ofV dc+V ac sin(2πf 0 t), wheref 0∼1 MHz. The carrier dynamics and the bifurcation routes to chaos are discussed in terms of the observed phase diagram and the bifurcation map. The deterministic nature of the strange attractors are described in detail in terms of the correlation dimension and the Kolmogorov entropy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01141273
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  • 4
    Electronic Resource
    Electronic Resource
    Comparative platelet anti-aggregant activity of D-cysteinolic acid analogues (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 1110-1112 
    Details
    ISSN: 1420-9071
    Keywords: D-Cysteinolic acid ; platelet aggregation ; inhibitor ; marine product ; 2-aminoethyl disulfide ; sardine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary D-Cysteinolic acid (1) analogues with an S-C-C-N skeleton showed increased platelet anti-aggregant activity in the following order: 2-aminoethanesulfonic acids, thiazolidines, 2-aminoethanethiols and 2-aminoethyl disulfides. Methyl substitutions at the 2-position potentiated the activity. Of these analogues, bis [(R)-2-aminopropyl] disulfide was the most potent inhibitor of platelet aggregation, with about 600-fold the activity of (1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950172
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  • 5
    Electronic Resource
    Electronic Resource
    Interspecific hybridization between Nicotiana repanda Willd. and N. tabacum L. through the pollen irradiation technique and the egg cell irradiation technique (1988)
    Springer
    Theoretical and applied genetics 76 (1988), S. 293-298 
    Details
    ISSN: 1432-2242
    Keywords: Wide hybridization ; Hybrid inviability ; Irradiation ; Ovule culture ; Tobacco
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two techniques were useful in overcoming hybrid inviability between N. repanda and N. tabacum. These techniques combine gamma-ray irradiation to pollen or to egg cells (in ovules) with in vitro culture of fertilized ovules. When in vitro culture of fertilized ovules from in situ hybridization of N. repanda x N. tabacum was combined without gamma-ray irradiation to pollen or to egg cells (in ovules), all of the resulting seedlings developed chlorosis and died. Furthermore, in the case of in situ hybridization of N. repanda x N. tabacum with gamma-ray irradiated N. tabacum pollen, no viable seeds were obtained. By using both techniques, combining gamma-ray irradiation to N. tabacum pollen or to egg cells in (N. repanda ovules) with in vitro culture of fertilized ovules, we were successful in obtaining flowering hybrid plants. Thus, it appears that it may be possible to overcome hybrid inviability to a certain extent using both the pollen irradiation technique and the egg cell irradiation technique, i.e., gamma-ray irradiation to pollen or to egg cells (in ovules) before pollination and in vitro culture of fertilized ovules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00257858
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  • 6
    Electronic Resource
    Electronic Resource
    Intraspecific hybridization and its bearing on chromosome evolution inVicia narbonensis (Fabaceae) (1989)
    Springer
    Plant systematics and evolution 167 (1989), S. 201-217 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Fabaceae ; Vicia narbonensis ; Intraspecific crosses ; interchange homozygote ; karyotype ; meiotic pairing ; chromosome differentiation ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nine accessions ofVicia narbonensis, considered to be the wild progenitor of faba bean (Vicia faba), were investigated to ascertain the nature and extent of intraspecific karyotypic polymorphism. The chromosome complements resolved into four distinct types (A, B, C, D), and the meiotic data of F1 hybrids (A × B, B × C, A × C) revealed that alteration in chromosome morphology is the result of segmental interchanges. The interchange complexes indicate that the parents differ from each other by 1 to 2 interchanges. It is also evident that karyotype B, and not A as previously reported, is the normal karyotype of the species, and A and C are single homozygotes for unequal interchange. The comparative karyomorphology of the parents and the hybrids, and of two interchange heterozygotes of four chromosomes each in F1 hybrids of A × C shows that the chromosomes involved in the single interchange homozygotes (A, C) are not common and the breaks in both interchanges occurred in short and long arms of the involved chromosomes. Identification of the interchanged chromosomes in the complements and the frequency of ring and chain quadrivalents in the heterozygotes enabled location of the breakpoints. The present results provide probably the first example indicating that interchange homozygosity (A) is not only firmly established but also has enabled the species to spread further by adapting to a wide range of habitats. — The genetic relationships between A and D are very different. All seven chromosome pairs in D could be distinguished from A, and for that matter, B and C as well. From the meiotic pairing properties it is also amply clear that genome D is well differentiated from A and possibly B, and C, and deserves special status.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936407
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  • 7
    Electronic Resource
    Electronic Resource
    Dimerisation und Polymerisation von Butadien mit nullwertigem Ni und protonischen Säuren (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 349-349 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02352217
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  • 8
    Electronic Resource
    Electronic Resource
    Electro-oxidative polymerization of p-dialkoxybenzenes and its mechanism (1988)
    Springer
    Polymer bulletin 19 (1988), S. 533-538 
    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 p-Dimethoxybenzene is anodically oxidative polymerized to poly(2,5-dimethoxy-1,4-phenylene). p-Diethoxybenzene and p-dipropoxybenzene are also polymerized because the alkoxy groups reduce oxidation peak potentials of the benzene derivatives. This electro-oxidative polymerization is studied with the preparative electrolysis and cyclic voltammetry. The polymerization contains an electrophilic reaction of cation radical of the benzene and proceeds through a stepwise or chain propagation according to the supplied potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283098
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  • 9
    Electronic Resource
    Electronic Resource
    A possible role of allantion and the influence of nodulation on its production in soybean plants (1977)
    Springer
    Plant and soil 48 (1977), S. 233-242 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To examine the influence of nodulation on the production of nitrogenous compounds, soybean plants (Glycine max var. Tamanishiki) were grown with or without N-fertilizer in the field, and the changes in amino-N and allantoin-N content in the different organs were determined throughout the growth period. In the stem allantoin-N markedly increased after the flowering period and then decreased during seed formation. Allantoin accumulated in the pod (up to 70 per cent of total alcohol soluble-N) during pod formation, while in the seed the main N-compounds were amino acids, the allantoin concentration being very low. In well-nodulated soybeans grown without N-fertilizer, allantoin content in every plant organ was always high compared to beans grown with N-fertilizer, but amino-N content was comparatively low. Another experiment, in which soybean plants were allowed to form nodules by growing on a N-free medium, and in which a fixed-N supply was then controlled by the addition of various levels of ammonium, was made in a greenhouse. When nodules were formed, the subsequent addition of high concentrations of ammonium caused the accumulation of allantoin as well as the accumulation of amides and arginine. A possible role for allantoin and some aspects of its production in soybeans are discussed. re]19760421
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015171
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  • 10
    Electronic Resource
    Electronic Resource
    A three-dimensional deformation analysis of workpieces grasped by chucks (1989)
    Springer
    Experimental mechanics 29 (1989), S. 443-447 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper deals with a three-dimensional deformation analysis of workpieces mounted in fixtures, where the workpieces are finite solid cylinders. The analysis is carried out using a three-dimensional theory of elasticity, where clamping forces caused by chucks are regarded as an axi-asymmetrical load. In numerical calculations, the effects of a number of chuck jaws, the diameter of workpieces and the grasping area on the roundness of the workpieces are shown. For verification, a three-dimensional photoelastic experiment is performed. In addition, the deformation of workpieces is measured by an electric comparator and by holography. The analytical results are satisfactorily consistent with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02323865
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