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  • 1995-1999  (4)
  • C-banding  (2)
  • Intramolecular transfer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Molecular structures of mononitroanilines and their thermal decomposition products (1997)
    Springer
    Theoretical chemistry accounts 95 (1997), S. 99-112 
    Details
    ISSN: 1432-2234
    Keywords: Nitroamline ; Internal rotation ; Molecular orbital ; Molecular structure ; Intramolecular transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The molecular structures of 2-nitro, 3-nitro, and 4-nitroaniline and their internal rotational isomers were calculated by anab-initio method using HF/6-31G* basis set. The geometries were influenced by the nitro group's position. The perturbation of the amino group on the nitro group was observed in a 2-nitroaniline isomer having a molecular structure distinct from that of the other two isomers. Among them, 4-nitroaniline is the most stable one. Internal rotation tests of either the nitro or amino group of 3-nitro and 4-nitroaniline indicate that no significant deformations of the phenyl ring occurred after internal rotation; however, the internal rotational isomers of 2-nitroaniline differed from its original structure. Relatively easier internal rotation of the nitro group than the amino group and different C-NO2 and C-NH2 bonds indicate the bond-breaking message of nitroanilines. As products of explosives induced by thermal or shock are of interest, five products of 2-nitroaniline were selected to assess their geometries and energies. The above calculations revealed that these products are thermodynamically unfavorable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02341695
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular cytogenetic analysis of Leymus racemosus chromosomes added to wheat (1997)
    Springer
    Theoretical and applied genetics 95 (1997), S. 1084-1091 
    Details
    ISSN: 1432-2242
    Keywords: Key words Triticum aestivum ; Leymus racemosus ; Chromosome addition lines ; C-banding ; RLFP analysis ; Homoeology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Five disomic, two double-disomic, and two ditelosomic addition lines and one disomic substitution line derived from the crosses of Triticum aestivum (2n=6x=42, AABBDD)×Leymus racemosus (2n= 4x=28, JJNN) were identified by C-banding analysis. The homoeology of the added Leymus chromosomes was determined by RFLP analysis. Four of five disomic addition lines belonged to group 2, 5, 6 and 7 chromosomes of L. racemosus; these were designated as 2Lr?1(NAU516), 5Lr?1(NAU504, NAU514), 6Lr?1 (NAU512), and 7Lr?1(NAU501). Two additional chromosomes, 1Lr?1 and 3Lr?1, were present in double-disomic addition lines 1Lr?1+5Lr?1 (NAU525) and 3Lr?1+7Lr?1(NAU524), respec-tively. In the disomic substitution line wheat chromosome 2B was replaced by L. racemosus chromosome 2Lr?1 (NAU551). Two telocentric chromosomes, 2Lr?2S (NAU509) and 7Lr?1S (NAU511), were isolated as ditelosomic addition lines. The study presented here provides the first evidence of homoeology of the added L. racemosus chromosomes with wheat chromosomes using DNA markers. Our data provide the basis for further directed chromosome engineering aimed at producing compensating wheat-L. racemosus translocation lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050666
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Identification and physical mapping of three Haynaldia villosa chromosome-6V deletion lines (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 1042-1046 
    Details
    ISSN: 1432-2242
    Keywords: Key words T. aestivum ; H. villosa ; C-banding ; RFLP ; Deletion mapping ; Pm21
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Three deletion lines (del6V?2S-1, del6V? 2L-1, and del6V?2L-2) of Haynaldia villosa chromosome 6V added to wheat were identified by C-banding and characterized by RFLP analyses. The breakpoints were located at fraction lengths (FL) 0.58 in del6V?2S-1 in the short arm, and FL 0.66 in del6V?2L-1 and FL 0.64 in del6V?2L-2 in the long arm. Thirty-one Triticeae homoeologous group-6 DNA probes were used to map RFLP loci in the deletion lines and the wheat-H. villosa disomic substitution (DS) line 6V?2(6A). Nine probes failed to detect polymorphism between Chinese Spring and DS6V?2(6A). Ten of sixteen polymorphic short-arm loci were not detected in del6V?2S-1. Thus, the loci are located in the deleted distal chromosome region. Six RFLP markers were mapped in the proximal 58% of 6VS. Of 20 DNA markers specific for 6VL, six mapped in the distal 36% of the long arm, and nine mapped in the proximal 64% of 6VL. The breakpoint of the short arm of 6V?2 occurs between Xpsr106 and Xcdo270, and that of the long arm between Xpsr915 and Xmwg934. The powdery mildew resistance gene Pm21 is located on the short arm of chromosome 6V?2. Pm21 is present in del6V?2S-1, and can be further mapped in the proximal 58% of 6V?2S.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050989
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular structures of mononitroanilines and their thermal decomposition products (1997)
    Springer
    Theoretica chimica acta 95 (1997), S. 99-112 
    Details
    ISSN: 0040-5744
    Keywords: Key words: Nitroaniline ; Internal rotation ; Molecular orbital ; Molecular structure ; Intramolecular transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract.  The molecular structures of 2-nitro, 3-nitro, and 4-nitroaniline and their internal rotational isomers were calculated by an ab-initio method using HF/6-31G* basis set. The geometries were influenced by the nitro group’s position. The perturbation of the amino group on the nitro group was observed in a 2-nitroaniline isomer having a molecular structure distinct from that of the other two isomers. Among them, 4-nitroaniline is the most stable one. Internal rotation tests of either the nitro or amino group of 3-nitro and 4-nitroaniline indicate that no significant deformations of the phenyl ring occurred after internal rotation; however, the internal rotational isomers of 2-nitroaniline differed from its original structure. Relatively easier internal rotation of the nitro group than the amino group and different C–NO2 and C–NH2 bonds indicate the bond-breaking message of nitroanilines. As products of explosives induced by thermal or shock are of interest, five products of 2-nitroaniline were selected to assess their geometries and energies. The above calculations revealed that these products are thermodynamically unfavorable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002140050187
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    Paper (German National Licenses)
    Fulltext
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