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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 13 (1981), S. 173-176 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 17 (1982), S. 2831-2840 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Wood is one of the few engineering materials for which design codes specify that the applied stress be contingent on the duration of the load. This is in recognition of the fact that the strength of wood appears to degrade with time when under stress. This paper describes a set of experiments in which the kinetics of wood fracture are examined. It is shown that the present results and those of earlier workers can be fully explained by a relatively simple model and mathematical analysis, based on fracture mechanics. According to these results, the delayed failure of wood is caused by subcritical crack growth. The model helps to reveal what must be done to incorporate the duration-of-load effect into timber design in a probabalistic manner.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 10 (1975), S. 846-856 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Slow crack growth tests on isotropic graphite and pyrolytic graphite at room temperature have revealed a stress intensity-crack velocity behaviour similar to the third stage of crack growth in soda-lime glass. Thus, it appears that graphite undergoes failure at room temperature only at large fractions of the critical stress intensity. Considerable difference in fracture behaviour of graphites having different microstructures was observed. Slow crack growth occurred more readily at 500
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  • 4
    ISSN: 1573-4927
    Keywords: phosphoglucomutase ; homology ; linkage ; house mouse ; major histocompatability complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The discovery of a third phosphoglucomutase locus (Pgm-3) in the house mouse is reported. Three alleles are recognized on the basis of differences in electrophoretic mobility and enzymatic activity. Pgm-3 a (fast mobility and high activity) is present in inbred strain C57BL/10J and 24 other strains; Pgm-3 b (slow mobility and high activity) is present in LP/Pas and six other strains; and Pgm-3 c (no detectable activity in any tissue tested) is present in strain DBA/2J and 14 other strains. Seventy-four recombinant inbred strains derived from progenitors that differed at Pgm-3 were used to study genic linkage. Pgm-3 is on chromosome 9 and is linked to Sep-1, d, Mod-1, and Ltw-3. Gene order and recombination frequencies are estimated as d 3.8±1.8% Pgm-3 2.3±1.2% Mod-1. Substrate specificities and cofactor requirements show that mouse Pgm-1 is homologous with human Pgm-2, mouse Pgm-2 with human Pgm-1, and mouse Pgm-3 with human Pgm-3.
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  • 5
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We recently proposed a new PCR-based genetic marker assay for the mouse genome that exploits sequence differences in the 3′-untranslated region (UTR) of cDNAs between different mouse strains, called “biallelic polymorphic expressed sequence tags (bESTs).” The specific use of 3′-UTR has several advantages: (1) frequent sequence polymorphism between different mouse strains, (2) most commonly uninterrupted by introns, (3) usually unique sequence even among closely related gene family members. In this paper, we identify additional genetic loci defined by bEST and determine their location on the mouse genetic map by using interspecific backross mapping panels between C57BL/6J and Mus spretus. Of 136 markers tested, 86 produced unique PCR products from C57BL/6J and M. spretus genomic DNAs. We then sequenced these 86 PCR products from C57BL/6J and M. spretus and found that 59 markers have sequence polymorphisms. Of these, we mapped 36 by restriction fragment length polymorphism (RFLP) of the PCR products and 4 by length polymorphism (LP) of the PCR products. We discuss the possibility of a large-scale application of this method for cDNA mapping.
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  • 6
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract To enhance the comparative map for human Chromosome (Chr) 13, we identified clones for human genes and anonymous loci that cross-hybridized with their mouse homologs and then used linkage crosses for mapping. Of the clones for four genes and twelve anonymous loci tested, cross-hybridization was found for six, COL4A1, COL4A2, D13S26, D13S35, F10, and PCCA. Strong evidence for homology was found for COL4A1, COL4A2, D13S26, D13S35, and F10, but only circumstantial homology evidence was obtained for PCCA. To genetically map these mouse homologs (Cf10, Col4a1, Col4a2, D14H13S26, D8H13S35, and Pcca-rs), we used interspecific and intersubspecific mapping panels. D14H13S26 and Pcca-rs were located on the distal portion of mouse Chr 14 extending by ∼30 cM the conserved linkage between human Chr 13 and mouse Chr 14, assuming that Pcca-rs is the mouse homolog of PCCA. By contrast, Cf10, Col4a1, Col4a2, and D8H13S35 mapped near the centromere of mouse Chr 8, defining a new conserved linkage. Finally, we identified either a closely linked sequence related to Col4a2, or a recombination hot-spot between Col4a1 and Col4a2 that has been conserved in humans and mice.
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  • 7
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Myodystrophy (myd), an autosomal recessive mutation of the mouse characterized by progressive weakness and dystrophic muscle histology, maps to the central portion of Chromosome (Chr) 8 (Lane et al. J. Hered 67, 135, 1976). This portion of Chr 8 contains the genes for a mitochondrial uncoupling protein (Ucp) and kallikrein (Kal3), which map to distal 4q in the human, providing evidence for a segment of homology. Characteristics of the myd phenotype coupled with this homology suggest that myd may be a mouse homolog of facioscapulohumeral muscular dystrophy (FSHD), which maps to human 4q35. We have confirmed and expanded the region of mouse 8-human 4 homology by generating a map of Chr 8 in an interspecific backcross of C57BL/6J and a partially inbred strain derived from M. spretus. The map is comprised of the genes for Ucp, coagulation factor XI (Cf11), and chloride channel 5 (Clc5), all of which have homologs on distal human 4q, 15 microsatellite loci, and the membrane cofactor protein pseudogene (Mcp-ps). To place myd in the genetic map, 75 affected progeny from an intersubspecific backcross of animals heterozygous for myd with Mus musculus castaneus were genotyped with Chr 8 microsatellite loci. The mutation maps between D8Mit30 and D8Mit75, an interval that is flanked by genes with human homologs at distal 4q. These results are consistent with the possibility that myd is the mouse homolog of FSHD.
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  • 8
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We established two mouse interspecific backcross DNA panels, one containing 94 N2 animals from the cross (C57BL/6J × Mus spretus)F1 × C57BL/6J, and another from 94 N2 animals from the reciprocal backcross (C57BL/6J × SPRET/Ei)F1 × SPRET/Ei. We prepared large quantities of DNA from most tissues of each animal to create a community resource of interspecific backcross DNA for use by laboratories interested in mapping loci in the mouse. Initial characterization of the genetic maps of both panels has been completed. We used MIT SSLP markers, proviral loci, and several other sequence-defined genes to anchor our maps to other published maps. The BSB panel map (from the backcross to C57BL/6J) contains 215 loci and is anchored by 45 SSLP and 32 gene sequence loci. The BSS panel map (from the backcross to SPRET/Ei) contains 451 loci and is anchored by 49 SSLP loci, 43 proviral loci, and 60 gene sequence loci. To obtain a high density of markers, we used motif-primed PCR to “fingerprint” the panel DNAs. We constructed two maps, each representing one of the two panels. All new loci can be located with a high degree of certainty on the maps at current marker density. Segregation patterns in these data reveal several examples of transmission ratio distortion and permit analysis of the distribution of crossovers on individual chromosomes.
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  • 9
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Oligonucleotide primers of random sequence that were 12 bases in length, 58% in GC content, and lacking internal palindromes were designed. By random amplified polymorphic DNA (RAPD) PCR, these primers were used to survey for DNA variations between the progenitors of the mouse AXB and BXA recombinant inbred sets (A/J and C57BL/6J). We identified 17 DNA variants detected by 10 primers. Map positions for these variants were determined by comparing their strain distribution patterns in the AXB, BXA recombinant inbred sets with strain distribution patterns of previously published loci. When necessary, BXD and NXSM recombinant inbred sets were also used. These 17 new loci mapped to 12 chromosomes. The 10 primers were also used to survey 20 inbred mouse strains including the progenitors of other recombinant inbred sets and four mouse strains recently inbred from the wild (CAST/Ei, MOLF/Ei, PERA/Ei, and SPRET/Ei).
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  • 10
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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