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  • 1
    Electronic Resource
    Electronic Resource
    An ultrastructural study of spontaneous mineralization in the brains of aging mice (1982)
    Springer
    Acta neuropathologica 58 (1982), S. 120-124 
    Details
    ISSN: 1432-0533
    Keywords: Mouse ; Thalamus ; Mineralization ; X-ray microanalysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Spontaneous mineralization observed in the thalamus, and meninges of the median longitudinal fissure, of several strains of mice was studied by light and electron microscopy. The mineralized deposits were closely associated with blood vessels, were periodic acid-Schiff positive, and contained variable amounts of calcium. The thalamic deposits were found to be in an extra-cellular location, and consisted of a randomly arranged mass of fine fibrils or spicules, with laminations of varying electron density in larger deposits. The deposits appeared to develop on the surface of subendothelial and medial, vascular basement membranes. Energy dispersive, X-ray microanalysis demonstrated the presence of both calcium and phosphorus in small and large deposits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691652
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  • 2
    Electronic Resource
    Electronic Resource
    Peroxidase and leucine-aminopeptidase in diploidMedicago species closely related to alfalfa: Multiple gene loci, multiple allelism, and linkage (1981)
    Springer
    Theoretical and applied genetics 60 (1981), S. 221-228 
    Details
    ISSN: 1432-2242
    Keywords: Allozymes ; Peroxidase ; Leucine-aminopeptidase ; Linkage ; Lucerne ; Medicago
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The genetics of peroxidase and leucine-aminopeptidase isozymes was studied utilizing starch gel electrophoresis in the diploidsMedicago sativa L. (M. coerulea Less.) andM. falcata L. Three anodal and one cathodal sets of peroxidase isozymes identify four linked loci. In addition, two anodal sets of leucine-aminopeptidase isozymes identify two loci that may be linked. The allozymes at each of the loci segregated as expected for monomeric enzymes. However in several crosses there were deficiencies in the number of progeny in particular genotypic classes. This could result from the segregation of recessive deleterious genes linked to some of the allozyme alleles. This is the first report of multiple loci and multiple alleles determining isozymes inMedicago.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02342543
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of loprazolam and of triazolam on psychological functions (1984)
    Springer
    Psychopharmacology 82 (1984), S. 386-388 
    Details
    ISSN: 1432-2072
    Keywords: Loprazolam ; Triazolam ; Residual effects ; Psychological functions ; Rebound insomnia ; Accidents ; Spontaneous complaints ; Manual dexterity ; Visual analogue scales
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Twelve poor sleepers of mean age 52 years performed 2 h of laboratory tests three times on 1 day during each week of nightly intake of loprazolam 0.5 mg, loprazolam 1 mg, triazolam 0.5 mg, or continued placebos. Only in the mornings did loprazolam 1 mg cause impairment in manual dexterity and card-sorting, and triazolam 0.5 mg in manual dexterity. Using difference from baseline, withdrawal of either drug after 3 weeks was associated with poorer subjective quality of sleep than following continuing placebos. The rate of spontaneous complaints (including accidents) associated with the drugs was as informative as formal testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427691
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  • 4
    Electronic Resource
    Electronic Resource
    Segregation of allozymes in megagametophytes of viable seed from a natural population of jack pine, Pinus banksiana Lamb. (1984)
    Springer
    Theoretical and applied genetics 69 (1984), S. 145-151 
    Details
    ISSN: 1432-2242
    Keywords: Segregation distortion ; Allozymes ; Pinus banksiana Lamb. ; Lethal allelism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Segregation ratios of allozymes in haploid female gametophytes obtained from viable seed were studied in a natural population of jack pine, Pinus banksiana. Stability of these ratios was assessed for three levels of the sexually reproductive crown as well as for four years of natural fertilization. Analyses of observed segregation ratios of four of five polymorphic isozyme loci showed good correspondence to the overall 1∶1 ratios expected for simple Mendelian inheritance. Allozymes of glucose-6-phosphate dehydrogenase did not segregate in the expected 1∶1 ratio. In addition, there were significant deviations from the expected segregation ratio for all the loci at some sampling positions on individual trees. Heterogeneity of segregation among trees, strata and years could be the result of pollen pool heterogeneity, segregation distortion and/or recessive lethal and semi-lethal gene combinations resulting in early embryo abortion. These types of segregation deviations in viable seed can affect the estimation of allele frequencies from bulked samples of a small number of individuals, the inference of heterozygosity/homozygosity of parental trees, and estimates of selfing rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272888
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  • 5
    Electronic Resource
    Electronic Resource
    Estimation of mating system parameters in plant populations using the EM algorithm (1983)
    Springer
    Theoretical and applied genetics 65 (1983), S. 157-161 
    Details
    ISSN: 1432-2242
    Keywords: Maximum-likelihood estimation ; Mating systems ; Incomplete data ; EM algorithm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An EM algorithm procedure is presented for the maximum-likelihood estimation of mating system parameters of mixed mating system models for both angiosperms and gymnosperms. One advantage of the procedure is the ability to accommodate any number of alleles in the mature population and pollen pool. Estimates of the outcrossing rate ( $$\hat t$$ ) derived from the model are bounded strictly within the natural biological range (i.e., 0 ≦ $$\hat t$$ ≦1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264884
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of inoculum density, nitrogen source and saprophytic fungi on Fusarium wilt of Mexican lime (1984)
    Springer
    Plant and soil 79 (1984), S. 203-210 
    Details
    ISSN: 1573-5036
    Keywords: Aspergillus ochraceus ; Citrus ; Fungal antagonism ; Pencillium funiculosum ; pH effect ; Trichoderma harzianum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Mexican lime seedlings were inoculated with 0, 500, 1000, 2000, 4000 and 8000 microconidia ofFusarium oxysporum f. sp.citri per gram of potting media. The percent infection and mean disease severity rating increased with increasing inoculum density of the pathogen. In potting mix infested withAspergillus ochraceus, Penicillium funiculosum andTrichoderma harzianum at 5000 conidia per gram 2 weeks prior to infestation withF. oxysporum f. sp.citri at 0, 1000, 4000, and 8000 microconidia per gram,A. ochraceus reduced,P. funiculosum increased andT. harzianum had no effect on disease severity or pathogen population. OnlyP. funiculosum showed antagonistic activityin vitro against the pathogen. Disease severity and pathogen propagule densitites were greater and pH was lower in potting media fertilized with NH4−N than in media fertilized with NO3−N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182342
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  • 7
    Electronic Resource
    Electronic Resource
    Modelling flow over a backward-facing step using the F.E.M. and the two-equation model of turbulence (1981)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 1 (1981), S. 295-304 
    Details
    ISSN: 0271-2091
    Keywords: Numerical Methods ; Turbulence ; Separation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Flow over a downstream-facing step is predicted using the F.E.M. A two-equation model of turbulence is employed where the transport of turbulence kinetic energy and dissipation rate are depicted using transport-type equations, i.e. the two-equation model of turbulence. The results obtained are compared with other models and experimental results. Generally, the model was found to be under-predictive with regard to the reattachment length when previous empirical data was used in the transport equations.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650010403
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  • 8
    Electronic Resource
    Electronic Resource
    Turbulent heat transfer via the F.E.M.: Heat transfer in rod bundles (1983)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 3 (1983), S. 363-375 
    Details
    ISSN: 0271-2091
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Heat transfer associated with forced convection between bundles of cylindrical fuel rods is analysed using the finite element method. A subchannel technique is employed and the numerical results are compared with previous experimental and numerical values. The solid and fluid zones are analysed, for temperature distribution, as a single domain.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650030406
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  • 9
    Electronic Resource
    Electronic Resource
    The solution of non-linear hyperbolic equation systems by the finite element method (1984)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 4 (1984), S. 1043-1063 
    Details
    ISSN: 0271-2091
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The difficulties experienced in the treatment of hyperbolic systems of equations by the finite element method (or other) spatial discretization procedures are well known. In this paper a temporal discretization precedes the spatial one which in principle is considered along the characteristics to achieve a self adjoint form. By a suitable expansion, the original co-ordinates are preserved and combined with the use of a standard Galerkin process to achieve an accurate discretization. It is shown that the process is equivalent to the Taylor-Galerkin methods of Donea.17Several examples illustrate the accuracy and efficiency attainable in such problems as transport, shallow water equations, transonic flow etc.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650041105
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  • 10
    Electronic Resource
    Electronic Resource
    A fully nonlinear analysis of heat and mass transfer problems in porous bodies (1980)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 15 (1980), S. 1381-1393 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The finite element method is used to analyse heat and mass transfer problems in porous media, in which the thermophysical properties are allowed to vary as functions of temperature and moisture. An example is given of the application of the method to the problem of timber drying.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620150910
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