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  • ACOUSTICS  (2)
  • AEROSPACE MEDICINE  (1)
  • BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)  (1)
  • 2000-2004  (1)
  • 1990-1994  (3)
  • 1965-1969
Collection
Keywords
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  • 2000-2004  (1)
  • 1990-1994  (3)
  • 1965-1969
  • 1975-1979  (1)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Application of BARE-1 retrotransposon markers to the mapping of a major resistance gene for net blotch in barley (2000)
    Springer
    Molecular genetics and genomics 264 (2000), S. 325-334 
    Details
    ISSN: 1617-4623
    Keywords: BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Net blotch, which is caused by the fungus Pyrenophora teres Drechs. f. teres Smedeg., presents a serious problem for barley production worldwide, and the identification and deployment of sources of resistance to it are key objectives for many breeders. Here, we report the identification of a major resistance gene, accounting for 65% of the response variation, in a cross between the resistant line CI9819 and the susceptible cv. Rolfi. The resistance gene was mapped to chromosome 6H with the aid of two recently developed systems of retrotransposon-based molecular markers, REMAP and IRAP. A total of 239 BARE-1 and Sukkula retrotransposon markers were mapped in the cross, and the 30-cM segment containing the locus with significant resistance effect contained 26 of the markers. The type and local density of the markers should facilitate future map-based cloning of the resistance gene as well as manipulation of the resistance through backcross breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380000326
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    Paper (German National Licenses)
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  • 2
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    On the effect of acoustic coupling on random and harmonic plate vibrations (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The effect of acoustic coupling on random and harmonic plate vibrations is studied using two numerical models. In the coupled model, the plate response is obtained by integration of the nonlinear plate equation coupled with the nonlinear Euler equations for the surrounding acoustic fluid. In the uncoupled model, the nonlinear plate equation with an equivalent linear viscous damping term is integrated to obtain the response of the plate subject to the same excitation field. For a low-level, narrow-band excitation, the two models predict the same plate response spectra. As the excitation level is increased, the response power spectrum predicted by the uncoupled model becomes broader and more shifted towards the high frequencies than that obtained by the coupled model. In addition, the difference in response between the coupled and uncoupled models at high frequencies becomes larger. When a high intensity harmonic excitation is used, causing a nonlinear plate response, both models predict the same frequency content of the response. However, the level of the harmonics and subharmonics are higher for the uncoupled model. Comparisons to earlier experimental and numerical results show that acoustic coupling has a significant effect on the plate response at high excitation levels. Its absence in previous models may explain the discrepancy between predicted and measured responses.
    Keywords: ACOUSTICS
    Type: NASA-TM-107740 , NAS 1.15:107740
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Nonlinear random response prediction using MSC/NASTRAN (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An equivalent linearization technique was incorporated into MSC/NASTRAN to predict the nonlinear random response of structures by means of Direct Matrix Abstract Programming (DMAP) modifications and inclusion of the nonlinear differential stiffness module inside the iteration loop. An iterative process was used to determine the rms displacements. Numerical results obtained for validation on simple plates and beams are in good agreement with existing solutions in both the linear and linearized regions. The versatility of the implementation will enable the analyst to determine the nonlinear random responses for complex structures under combined loads. The thermo-acoustic response of a hexagonal thermal protection system panel is used to highlight some of the features of the program.
    Keywords: ACOUSTICS
    Type: NASA-TM-109029 , NAS 1.15:109029
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Space radiation health research, 1991-1992 (1993)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The present volume is a collection of 227 abstracts of radiation research sponsored by the NASA Space Radiation Health Program for the period 1991-1992. Each abstract has been categorized within one of three discipline areas: Physics, Biology and Risk Assessment. Topic areas within each discipline have been assigned as follows: Physics - Atomic Physics, Theory, Cosmic Ray and Astrophysics, Experimental, Environments and Environmental Models, Solar Activity and Prediction, Experiments, Radiation Transport and Shielding, Theory and Model Development, Experimental Studies, and Instrumentation. Biology - Biology, Molecular Biology, Cellular Radiation Biology, Transformation, Mutation, Lethality, Survival, DNA Damage and Repair, Tissue, Organs, and Organisms, In Vivo/In Vitro Systems, Carcinogenesis and Life Shortening, Cataractogenesis, Genetics/Developmental, Radioprotectants, Plants, and Other Effects. Risk Assessment - Risk Assessment, Radiation Health and Epidemiology, Space Flight Radiation Health Physics, Inter- and Intraspecies Extrapolation and Radiation Limits and Standards. Section I contains refereed journals; Section II contains reports/meetings. Keywords and author indices are provided. A collection of abstracts spanning the period 1986-1990 was previously issued as NASA Technical Memorandum 4270.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-TM-109721 , NAS 1.15:109721
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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