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  • Earth Resources and Remote Sensing  (4)
  • MECHANICAL ENGINEERING  (4)
  • Nuclear Reactions  (3)
  • Oryza sativa L.  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Identification of a set of RFLP probes for subspecies differentiation in Oryza sativa L. (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 878-884 
    Details
    ISSN: 1432-2242
    Keywords: Restriction fragment length polymorphism (RFLP) ; Probe screening ; Subspecies differentiation ; Wide compatibility variety ; Oryza sativa L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sixty-eight indica-japonica tester-differentiating RFLP probes were tested in seven indica and seven japonica varieties of rice (Oryza sativa L.) with four enzyme digestions (EcoRI, EcoRV, HindIII and DraI). Twenty-one DNA clones were isolated as indica-japonica subspecies-differentiating probes. A set of 13 probes was established as core probes for subspecies differentiation and a pooled blotting analysis was carried out to facilitate the application of RFLP in rice genetics and breeding practice. A dendrogram of 12 wide-compatibility varieties was constructed based on RFLPs detected by 13 core probes with single enzyme digestions. It was speculated that most RFLPs of indica-japonica differentiating probes were generated by insertions/deletions, which may be of great significance for the origin and differentiation of subspecies in Oryza sativa L.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222026
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    RFLP-based phylogenetic analysis of wide compatibility varieties in Oryza sativa L. (1994)
    Springer
    Theoretical and applied genetics 88 (1994), S. 65-69 
    Details
    ISSN: 1432-2242
    Keywords: Oryza sativa L. ; RFLP ; Wide compatibility ; Subspecies differentiation ; Heterosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Twenty-one wide compatibility varieties (WCVs) of rice together with three indica and three japonica testers were assayed with 160 DNA probes that were selected to represent the entire RFLP map at an average interval of 11 cM. On the basis of four enzyme digestion 125 probes detected polymorphisms among the WCVs and subspecies' testers. Among these polymorphic probes there were 68 that could distinguish the indica from the japonica testers. Two dendrograms were constructed on the basis of 398 polymorphic fragments of 125 probes and 139 polymorphic fragments of 68 subspecies' differentiating probes in combination with single enzymes, respectively. The reliability and representativeness of the testers and the levels of DNA variations among WCVs were estimated. The potential of WCVs in the utilization of intersubspecific heterosis is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222395
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    RFLP mapping of QTLs for yield and related characters in rice (Oryza sativa L.) (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 920-927 
    Details
    ISSN: 1432-2242
    Keywords: Oryza sativa L. ; RFLP ; Yield traits ; QTLs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Quantitative triat loci (QTLs) for yield and related traits in rice were mapped based on RFLP maps from two indica/indica F2 populations, Tesanai 2/CB and Waiyin 2/CB. In Tesanai 2/CB, 14 intervals carrying QTLs for eight traits were detected, including 3 for grain weight per plant (GWT), 2 for number of panicles per plant (NP), 2 for number of grains per panicle (NG), 1 for total number of spikelets per panicle (TNS), 1 for spikelet fertility (SF), 3 for 1000-grain weight (TGWT), 1 for spikelet density (SD), and 1 for number of first branches per main panicle. The 3 QTLs for GWT were located on chromosomes 1, 2, and 4, with 1 in each chromosome. The additive effect of the single locus ranged from 2.0 g to 9.1 g. A major gene (np4) for NP was detected on chromosome 4 within the interval of RG143–RG214, about 4cM for RG143, and this locus explained 26.1% of the observed phenotypic variance for NP. The paternal allele of this locus was responsible for reduced panicles per plant (3 panicles per plant). In another population, Waiyin 2/CB, 12 intervals containing QTLs for six of the above-mentioned traits were detected, including 3 for GWT, 2 for each of NP, TNS, TGWT and SD, 1 for SF. Three QTLs for GWT were located on chromosome 1, 4, and 5, respectively. The additive effect of the single locus for GWT ranged from 6.7 g to 8.8 g, while the dominance effect was 1.7–11.5 g. QTL mapping in two populations with a common male parent is compared and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224031
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  • 4
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    Energy dependence of phenomenological optical model potentials for the ^{7}Li+^{11}B reaction (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-04-11
    Description: Author(s): L. Yang, C. J. Lin, H. M. Jia, X. X. Xu, F. Yang, H. Q. Zhang, Z. H. Liu, P. F. Bao, and L. J. Sun Angular distributions of 7 Li+ 11 B elastic scattering were measured at E lab ( 7 Li)=9.85, 13.3, 18.3, 23.3, and 28.3 MeV within the angular range of θ c.m. ≈15 ∘ –80 ∘ . Optical model potentials have been extracted from these angular distributions and the data available in the literature at E lab ( 7 Li)=34 MeV an... [Phys. Rev. C 87, 047601] Published Wed Apr 10, 2013
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Optical model potentials for the 6He+209Bi reaction from a Pb208(Li7,He6)Bi209 reaction analysis (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-04-29
    Description: Author(s): L. Yang, C. J. Lin, H. M. Jia, F. Yang, Z. D. Wu, X. X. Xu, H. Q. Zhang, Z. H. Liu, P. F. Bao, L. J. Sun, and N. R. Ma Angular distributions of the Pb208(Li7,He6)Bi209 reactions with one-proton transferred to the ground, first-excited, and second-excited states of Bi209 were measured at Elab=25.67, 28.55, 32.55, 37.55, and 42.55 MeV. The experimental data and the data available in the literature at Elab=52 MeV were ... [Phys. Rev. C 89, 044615] Published Mon Apr 28, 2014
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Optical model potentials for ^{6} He+ ^{64} Zn from ^{63} Cu( ^{7} Li, ^{6} He) ^{64} Zn reactions (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-03-31
    Description: Author(s): L. Yang, C. J. Lin, H. M. Jia, D. X. Wang, L. J. Sun, N. R. Ma, F. Yang, Z. D. Wu, X. X. Xu, H. Q. Zhang, Z. H. Liu, and P. F. Bao Angular distributions of the transfer reaction Cu 63 ( Li 7 , He 6 ) Zn 64 were measured at E lab ( Li 7 ) = 12.67 , 15.21, 16.33, 23.30, 27.30, and 30.96 MeV. With the interaction potentials of the entrance channel Li 7 + Cu 63 obtained from elastic scattering data as input, the optical potentials of the halo nuclear sy… [Phys. Rev. C 95, 034616] Published Thu Mar 30, 2017
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    CERES and the S'COOL Project (1997)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The first Clouds and the Earth's Radiant Energy System (CERES) instrument will be launched on the Tropical Rainfall Measuring Mission (TRMM) spacecraft from a Japanese launch site in November 1997. This instrument is a follow-on to the Earth Radiation Budget Experiment (ERBE) begun in the 1980's. The instrument will measure the radiation budget - incoming and outgoing radiant energy - of the Earth. It will establish a baseline and look for climatic trends. The major feature of interest is clouds, which play a very strong role in regulating our climate. CERES will identify clear and cloudy regions and determine cloud physical and microphysical properties using imager data from a companion instrument. Validation efforts for the remote sensing algorithms will be intensive. As one component of the validation, the S'COOL (Students' Cloud Observations On-Line) project will involve school children from around the globe in making ground truth measurements at the time of a CERES overpass. Their observations will be collected at the NASA Langley Distributed Active Archive Center (DAAC) and made available over the Internet for educational purposes as well as for use by the CERES Science Team in validation efforts. Pilot testing of the S'COOL project began in January 1997 with two local schools in Southeastern Virginia and one remote site in Montana. This experience is helping guide the development of the S'COOL project. National testing is planned for April 1997, international testing for July 1997, and global testing for October 1997. In 1998, when the CERES instrument is operational, a global observer network should be in place providing useful information to the scientists and learning opportunities to the students.
    Keywords: Earth Resources and Remote Sensing
    Type: The Sixth Alumni Conference of the International Space University; 150-157; NASA-CP-3355
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Computation of the Effects of Inhomogeneous Clouds on Retrieval of Remotely Sensed Properties (1998)
    In:  CASI
    Details
    Publication Date: 2018-06-02
    Description: Current and future earth observation programs depend on satellite measurements of radiance to retrieve the properties of clouds on a global basis. At present, this retrieval is made assuming that the clouds in the instrument field of view are plane parallel and independent of adjacent pixels. While this assumption is known to be false except in very limited cases, its impact can be evaluated, and if possible corrected, based on emerging theoretical techniques. In this study, the Spherical Harmonic Discrete Ordinate Method (SHDOM, Evans, 1996) has been used to assess the sensitivity of the retrieval to a variety of cloud parameters. SHDOM allows the plane parallel assumption to be relaxed and makes 2D and even 3D radiative solutions practical. A previous study (Chambers et al., 1996) assessed the effect of horizontal inhomogeneity in 45 LANDSAT scenes of boundary layer clouds over ocean. The four scenes studied here represent overcast, broken, scattered and strongly thermally forced cloud fields and are used to perform sensitivity studies to a wider variety of parameters. Comparisons are made at three solar zenith angles (theta (sub 0) = 0, 49, and 63 degrees) to avoid ambiguity in the results due to solar zenith angle.
    Keywords: Earth Resources and Remote Sensing
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Dynamic loading on parallel shaft gears (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A computer-based analysis of the dynamic effects of spur gear systems is presented. The method of analysis with its associated computer code is capable of determining the dynamic response of spur gear systems having involute tooth profiles and standard contact ratios. Various parameters affecting the system dynamic behavior are examined. Numerical results of the analysis are compared with semi-empirical formulae, AGMA (American Gear Manufacturers Association) formulae, and experimental data. A close correlation with the experimental data is obtained.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CR-179473 , NAS 1.26:179473 , UC-MIE-051586-19
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Dynamic analysis of straight and involute tooth forms (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The effect of load speed on straight and involute tooth forms is studied using several finite-element models. It is found that for rapidly rotating gears and sprockets, the load speed along the tooth surface can significantly affect the tooth vibration. Indeed, it is found that for sufficiently high load speeds and for sufficiently slender tooth forms, the tooth deflection can, at times, be directed opposite to the load direction. Comparisons are made of various dynamic models of gear and sprocket teeth. It is shown that for stubby tooth forms there is considerable difference between results obtained with finite element models and results obtained with Timoshenko beam models. Finally, it is shown that gear or sprocket vibrations can be induced by the shape of the tooth form itself. This effect becomes increasingly significant at higher speeds.
    Keywords: MECHANICAL ENGINEERING
    Type: ASME PAPER 84-DET-226
    Format: text
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