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  • 1
    Electronic Resource
    Electronic Resource
    Molecular orientation and structure in ultrathin films of amphiphilic microgel copolymer with the branching of octadecyl groups studied by infrared spectroscopy (1997)
    Springer
    Colloid & polymer science 106 (1997), S. 144-146 
    Details
    ISSN: 1435-1536
    Keywords: IR ; ultrathin films ; LB films ; amphiphilic polymer ; microgel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Molecular orientation and structure in five-monolayer Langmuir-Blodgett (LB) films of an amphiphilic polymer consisting of a flexible hydrophilic epichlorohydrinethylene diamine cross-linking microgels and a number of hydrophobic chains have been studied by infrared (IR) transmission and reflection-absorption (RA) spectroscopy. The downward shifts of the NH and C=O stretching bands show that the amide groups are involved in medium hydrogen bonds. A comparison of the band intensities between the transmission and RA spectra indicates that the hydrocarbon chains are nearly perpendicular to the substrate surface while the C-N bond of the amide group is nearly parallel to the surface. The vibrational frequencies of the two CH2 stretching bands suggest that the LB films have highly ordered alkyl chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01189509
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  • 2
    Electronic Resource
    Electronic Resource
    Screening wheat genotypes for high callus induction and regeneration capability from anther and immature embryo cultures (1998)
    Springer
    Plant cell, tissue and organ culture 53 (1998), S. 67-74 
    Details
    ISSN: 1573-5044
    Keywords: anther culture ; callus ; embryo culture ; plant regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plant regeneration via tissue culture varies with the genotype and is an important factor in establishing cell selection and genetic transformation systems. To select genotypes – especially Japanese ones – with a high regeneration capability, we screened 107 wheat genotypes (78 domestic, 29 foreign) for callus induction and regeneration capability from anther and immature embryo cultures. For anther culture, 83 of 107 genotypes tested induced calli and 45 regenerated plants. Only 9 genotypes, however, produced green plants, 25 produced only albino plants, and 11 produced both green and albino plants. Glennson 81 was the highest in callus induction, followed by Orofen, Danchi–komugi and Chris. The genotypes with a relatively high regeneration capability were Framala 80 at 24% and Glennson 81 at 19%, these two genotypes produced only green plants. For immature embryo culture, 97 genotypes showed a 90% callus induction rate and 74 genotypes regenerated plants. Very few genotypes produced albino plants. The genotypes with a high regeneration capability were Genaro 81 at 90%, Chinese Spring at 80%, and Norin 75 at 75%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006023725640
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    Paper (German National Licenses)
    Fulltext
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