Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Structure of Cu-bearing orthopyroxene, Mg(Cu.56,Mg.44)Si2O6, and behavior of Cu2+ in the orthopyroxene structure (1997)
    Springer
    Physics and chemistry of minerals 24 (1997), S. 463-476 
    Details
    ISSN: 1432-2021
    Keywords: Key words Cu2+-beearing orthopyroxene ; Orthopyroxene ; Crystal structure ; Jahn-Teller effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract  Cu-bearing pyroxene, Mg(Cu.56,Mg.44)Si2O6, has been synthesized by a flux method and crystal structure refinement has been performed by single crystal X-ray diffraction. It is found that the crystal structure is orthorhombic (space group Pbca) with unit cell dimensions of a=18.221(4), b=8.890(1), c=5.2260(7)Å and the cell volume of 846.5( )3Å3. In the M2-site one of the M-O bonds(M-O3B) is extremely expanded from 2.444(2) in enstatite to 2.732(2), thus the coordination polyhedron around M2-site is regarded as square pyramidal rather than square planar or octahedral. It is also found that the M1-site in the pyroxene structure is occupied almost exclusively by Mg, while the M2-site is almost evenly occupied by Mg and Cu. The observed extreme site preference shown by Cu2+ is unusual among the divalent cations with similar ionic sizes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002690050061
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A fungal chitinase gene from Rhizopus oligosporus confers antifungal activity to transgenic tobacco (1997)
    Springer
    Plant cell reports 16 (1997), S. 439-443 
    Details
    ISSN: 1432-203X
    Keywords: Key words Fungal chitinase ; Transgenic tobacco ; Antifungal activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have studied whether a chitinase involved in cell autolysis of a filamentous fungus, Rhizopus oligosporus, can operate as an antifungal defense system in tobacco. The chi1 gene was introduced into tobacco by the Agrobacterium tumefaciens leaf disc system. Among 22 transgenic tobacco plants, 2 were selected and their individual homozygous progeny, Tch1-1 and Tch2-1, were studied. Chitinase activity in the extracts of young leaves from Tch1-1 or Tch2-1, in which the chi1 gene product was detected by Western blot analysis, was three- to four-fold higher than that from the control plants. A fungal infection assay on the leaves infected with the discomycete pathogens Sclerotinia sclerotiorum and Botrytis cinerea revealed that the symptoms observed with these two were remarkably suppressed as compared with the control leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01092762
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A fungal chitinase gene fromRhizopus oligosporus confers antifungal activity to transgenic tobacco (1997)
    Springer
    Plant cell reports 16 (1997), S. 439-443 
    Details
    ISSN: 1432-203X
    Keywords: Fungal chitinase ; Transgenic tobacco ; Antifungal activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have studied whether a chitinase involved in cell autolysis of a filamentous fungus,Rhizopus oligosporus, can operate as an antifungal defense system in tobacco. Thechi1 gene was introduced into tobacco by theAgrobacterium tumefaciens leaf disc system. Among 22 transgenic tobacco plants, 2 were selected and their individual homozygous progeny, Tch1-1 and Tch2-1, were studied. Chitinase activity in the extracts of young leaves from Tch1-1 or Tch2-1, in which thechi1 gene product was detected by Western blot analysis, was three- to four-fold higher than that from the control plants. A fungal infection assay on the leaves infected with the discomycete pathogensSclerotinia sclerotiorum andBotrytis cinerea revealed that the symptoms observed with these two were remarkably suppressed as compared with the control leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01092762
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...