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
Filter
  • 2005-2009  (3)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Kinetics of Interfacial Reaction in SiC〈sub〉f〈/sub〉/Ti6Al4V Composites (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 1627-1632 
    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: The Ti6Al4V composites reinforced with Chinese SiC fiber was manufactured and thenthermally exposed at 800°C, 900°C and 1000°C, respectively, for up to 500h. The interfacial reactionproducts were identified as TiC between Ti6Al4V and the C-coating of the SiC fiber. However, if theSiC fiber has no C-coating, the interfacial reaction forms TiC, Ti3SiC2, Ti5Si3(Cx) and Ti3Si(Cx). Thethickness of the interfacial reaction zone was measured and it is found that the thickening rate isslower in the samples in which the SiC fiber has the C-coating. The growth of the interfacial reactionproducts is diffusion-controlled and the parameters of the growth kinetics, k0 and Q, were determined,respectively. The profile of the element distribution was calculated according to the diffusion theoryand is well consistent with the expeimental data
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1627.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    High-efficiency transformation of Gossypium hirsutum embryogenic calli mediated by Agrobacterium tumefaciens and regeneration of insect-resistant plants (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A simple protocol of transformation of cotton (Gossypium hirsutum L.) at a high frequency has been developed via Agrobacterium mediation, coupled with the use of embryogenic calli as explants. Embryogenic calli derived from only one to two somatic embryogenic calli lines of two Chinese cotton cultivars, the cvs. Ekang 9 and Jihe 321 which have low embryogenic potency were first inoculated with the A. tumefaciens strain LBA4404 harbouring binary vector pBin438 carrying a synthetic Bacillus thuringiensis-active Cry1Ac and API-B chimeric gene. Infected embryogenic calli were co-cultivated for 48 h and were then moved on to the selection medium with kanamycin (100 mg/l) for 7-8 weeks. Then, the kanamycin-resistant calli (Km1) subcultured in proliferation medium would re-differentiate to form somatic embryos in 30 days. Cotyledon embryos were transferred to 100-ml Erlenmeyer flasks for germination and regeneration. Putative transformants were confirmed by polymerase chain reaction and Southern blot analysis. Forty-five regenerated plants were successfully transferred to soil, of which 12 proved to have the active Cry1Ac and API-B chimeric gene. Insect resistance was tested by bioassay. The transgenic plants were highly resistant to cotton bollworm (Heliothis armigera) larvae, with mortality (insect resistance) ranging from 95.8 to 100%. In comparison with the methods used in Agrobacterium-mediated transformation of cotton hypocotyls or cotyledons, about 6 months are saved by using the method presented in this paper to obtain a large number of transgenic plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2004.01056.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Meiotic chromosome behaviour in an allotriploid derived from an amphidiploid × diploid mating in Cucumis (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A synthetic amphidiploid species Cucumis hyriviis Chen & Kirkbride (2n = 4x = 38; genome designated as HHCC) has recently been created from an interspecific mating between C. sativus L. (2n = 2x = 14: genome designated as CC) and C. hystrx. Chakr. (2n = 2x = 24; genome designated as HH). This amphidiploid is resistant to root knot nematode, tolerant to low irradiance, and has higher nutritional value than standard processing cucumber cultivars. An allotriploid (2n = 3x = 26; HCC) was derived from a cross between C. sativus L. and C. hytivus Chen & Kirkbride. Diploid meiotic behaviour in C. sativus and C. hystrix involves the development of seven and 12 metaphase bivalents respectively. In the derived allotriploid. univalents. bivalents, and trivalents (at relatively low frequency) were observed at metaphase I indicating that some homeologues from the C and H genomes can synapse. Based on a comparative karyotype analysis of cucumber (i.e. chromosome size and pairing behaviour) and aliotriploid plants, the seven bivalents observed at metaphase I were ascertained to be cucumber homologues, while the 12 univalents were of C. hystrix origin thus confirming the allotriploid karyotypic constitution to be HCC. On average, the frequency of trivalents was 0.24 at diakinesis and 0.22 in 100 meiocytes at metaphase I. indicating the possibility of genetic exchange due to the homoeology between the C and H genomes. After simultaneous cytokinesis, only polyads were observed in pollen mother cells (PMCs) at telophase II, which led to the production of sterile pollen grains. Multi-polarization of chromosomes was dominant at anaphase II. However. in about 20% PMCs. chromosomes separated to form a 7C + 1-2H complement, suggesting a possible method for the production of alien addition cucumber-C hystrix lines through further backcrossing of the allotriploid to diploid cucumber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2005.01066.x
    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...