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  • 1
    Electronic Resource
    Electronic Resource
    HSP70-2 is part of the synaptonemal complex in mouse and hamster spermatocytes (1996)
    Springer
    Chromosoma 104 (1996), S. 414-421 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mouse spermatogenic cells are known to express HSP70-2, a member of the HSP70 family of heatshock proteins. The purpose of the present study was to characterize further the expression and localization of HSP70-2 in meiotic cells of mice and hamsters. After separating mouse spermatogenic cells into cytoplasmic and nuclear fractions, proteins were separated by two-dimensional gel electrophoresis and detected with HSP-specific antibodies. Of several HSP70 proteins identified in the cytoplasm, only HSC70 and HSP70-2 were also detected in the nucleus. Immunocytological analyses of spermatocyte prophase cells revealed that HSP70-2 was associated with the synaptonemal complex. Surfacespread synaptonemal complexes at pachytene and diplotene stages labeled distinctly with the antiserum to HSP70-2. Synaptonemal complexes from fetal mouse oocytes failed to show any evidence of HSP70-2. Reverse-transcriptase-polymerase chain reaction (RT-PCR) analyses of gene expression confirmed this sex specificity; Hsp70-2 mRNA was detected in mouse testes, but not ovaries. These findings are suggestive of a previously unsuspected sexual dimorphism in structure and/or function of the synaptonemal complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352265
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  • 2
    Electronic Resource
    Electronic Resource
    On the distance to uncontrollability and the distance to instability and their relation to some condition numbers in control (1997)
    Springer
    Numerische Mathematik 76 (1997), S. 463-477 
    Details
    ISSN: 0945-3245
    Keywords: Mathematics Subject Classification (1991):65F35
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary. According to the methodology of [6], many measures of distance arising in problems in numerical linear algebra and control can be bounded by a factor times the reciprocal of an appropriate condition number, where the distance is thought of as the distance between a given problem to the nearest ill-posed problem. In this paper, four major problems in numerical linear algebra and control are further considered: the computation of system Hessenberg form, the solution of the algebraic Riccati equation, the pole assignment problem and the matrix exponential. The distances considered here are the distance to uncontrollability and the distance to instability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002110050272
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  • 3
    Electronic Resource
    Electronic Resource
    Minimizing the condition number of a positive definite matrix by completion (1994)
    Springer
    Numerische Mathematik 69 (1994), S. 17-23 
    Details
    ISSN: 0945-3245
    Keywords: Mathematics Subject Classification (1991):65F35, 15A12
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary. We consider the problem of minimizing the spectral condition number of a positive definite matrix by completion: $$\min\left\{ {\rm cond}\left(\mat{cc} A & B^{\rm H} \\ B & X \rix\right): \mat{cc} A & B^{\rm H} \\ B & X \rix \mbox {\rm positive definite} \right\},$$ \noindent where $A$ is an $n\times n$ Hermitian positive definite matrix, $B$ a $p\times n$ matrix and $X$ is a free $p\times p$ Hermitian matrix. We reduce this problem to an optimization problem for a convex function in one variable. Using the minimal solution of this problem we characterize the complete set of matrices that give the minimum condition number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002110050077
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  • 4
    Electronic Resource
    Electronic Resource
    High Magnetic Field Superconducting Magnet Technology and its Applications (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 1935-1940 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: High magnetic field superconducting magnet technology has been developed in the recentyears for all kinds of special applications in China. In the paper, the successful development of highmagnetic field superconducting magnet technology is presented
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1935.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Growth factor-like effect of urokinase type plasminogen activator in human renal cells
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 176 (1991), S. 1408-1416 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(91)90443-B
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  • 6
    Electronic Resource
    Electronic Resource
    A cycling assay for the determination of mono(adenosine-5'-diphosphoribose)-protein bound conjugate levels in mouse tissues
    Amsterdam : Elsevier
    Analytical Biochemistry 155 (1986), S. 188-192 
    Details
    ISSN: 0003-2697
    Keywords: ADP-ribosylation ; adenosine-5'-monophosphate ; cycling assay ; mono(adenosine-5'-diphosphoribose) conjugate ; mouse tissues ; nicotinamide adenine dinucleotide
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(86)90245-9
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  • 7
    Electronic Resource
    Electronic Resource
    Energy transfer and energy pooling from 2 ^2P"3"2","1"2 excited Li atoms in Li vapor
    Amsterdam : Elsevier
    Chemical Physics Letters 190 (1992), S. 494-496 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(92)85179-E
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  • 8
    Electronic Resource
    Electronic Resource
    Potential role for salicylic acid in induced resistance of asparagus roots to Fusarium oxysporum f.sp. asparagi (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 54 (2005), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Pre-inoculation of asparagus (Asparagus officinalis) roots with selected nonpathogenic isolates of Fusarium oxysporum (npFo) has previously been shown to induce systemic resistance against infection by F. oxysporum f.sp. asparagi (Foa) through activation of plant-defence mechanisms. To elucidate the putative npFo-mediated defence pathways, the effect of salicylic acid (SA) was examined in a split-root system of asparagus where one half of the seedling root system was drenched with SA and the activation of defence responses was measured subsequently on the remaining roots. SA-treated plants exhibited enhanced systemic resistance, with a significant reduction in disease severity of the roots inoculated with Foa, compared with untreated plants. SA activated peroxidase and phenylalanine ammonia-lyase, as well as lignification, upon Foa attack, in a manner similar to that observed with npFo pretreatment. In addition, application of diphenyleneiodonium, an SA biosynthesis inhibitor, led to failure of npFo to induce lignin deposition and systemic resistance. Treatment of fungal spores with SA did not affect germination and growth of either npFo or Foa in in vitro antifungal assays. Production of SA at the site of npFo infection may be involved in the induction of Foa resistance in asparagus roots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.2005.01163.x
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  • 9
    Electronic Resource
    Electronic Resource
    Type-II secretion pathway structural gene xpsE, xylanase- and cellulase secretion and virulence in Xanthomonas oryzae pv. oryzae (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 54 (2005), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Rice bacterial blight caused by Xanthomonas oryzae pv. oryzae is one of the most important diseases in rice-growing areas worldwide. Four virulence-deficient mutants were identified from a transposon mutagenesis library of X. oryzae pv. oryzae. Sequence-analysis revealed that the transposon of the four mutants inserted at different sites in the same ORF, which is homologous to the xpsE gene encoding a component of the type-II secretion system in many bacterial pathogens. Extracellular enzymes, such as xylanase and cellulase, were not secreted to the extracellular space in the mutants. Analysis of the protein profile of the extracellular, periplasmic and intracellular fractions indicated that at least two secreted proteins accumulated in the periplasmic space in the mutants. After genetic complementation of these mutants with a functional xpsE gene, the xpsE gene could express normally and the pathogenicity of the mutants and their secretion of extracellular enzymes were restored. Western blot analysis with an anticellulase antiserum also showed that cellulase was secreted normally in the complemented strains. The results show that the type-II secretion pathway structural gene xpsE is required for xylanase and cellulase secretion and full virulence in X. oryzae pv. oryzae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.2004.01101.x
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  • 10
    Electronic Resource
    Electronic Resource
    Induction of systemic disease resistance and pathogen defence responses in Asparagus officinalis inoculated with nonpathogenic strains of Fusarium oxysporum (2002)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 51 (2002), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The ability of nonpathogenic isolates of Fusarium oxysporum (npFo) to induce systemic resistance and defence responses against subsequent challenge with a pathogenic strain of F. oxysporum f. sp. asparagi (Foa) was examined in Asparagus officinalis. In a split-root experiment, roots inoculated with npFo exhibited a hypersensitive response and those subsequently inoculated with Foa displayed resistance. Induction of systemic resistance in npFo-treated plants led to significantly fewer necrotic lesions (P = 0·05) and reduced Foa disease severity compared with plants not treated with npFo. In hyphal-sandwich root inoculation experiments, activities of peroxidase and phenylalanine ammonia-lyase and lignin content were higher in npFo-treated plants and increased more rapidly than in npFo-untreated plants after Foa inoculation. Antifungal activity (inhibition of fungal spore germination and germ-tube growth) from exudates of roots inoculated with Foa were observed for npFo-treated plants but not for npFo-untreated plants. Thus, isolates of npFo may function as inducers of systemic acquired resistance (SAR) and defence responses against Foa invasion in A. officinalis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.2002.00682.x
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