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[en] Curcuma xanthorrhiza and Zingiber aromaticum, are important medicinal species of the Zingiberaceae family. They are used in traditional medicine known as Jamu. This study reports on the presence of sucrose and BA (benzylaminopurine) supplements in the culture medium and also the effect of varying culture condition on In vitro propagation of these two species. Murashige and Skoog (MS) medium supplemented with 5 mg L-1 BA and 30 g L-1 sucrose, incubated under total darkness, induced the highest number of multiple shoots in C. xanthorrhiza while the Z. aromaticum produced the highest number of multiple shoot in the same medium incubated under continuous light. The increase in sucrose concentration reduced shoot height in both species. Rooting of micro-shoots was not affected by the different culture treatments. The acclimatized plantlets of C. xanthorrhiza and Z. aromaticum were normal with 83.3-100% percentage when transferred to the outside environment.(author)
[en] The reaction of 1,3,5-triketones and arylhydrazines provided indolylpyrazole derivatives in a one-pot reaction in good to moderate yields. Both the pyrazole and indole rings were constructed simultaneously with phenylhydrazine, RCOCH2CO- moiety for the pyrazole and the remaining -CH2COR part for the indole ring
[en] Surface properties of polycarbazole at air-water interface have been investigated for the first time by measuring pressure-area isotherms. Pure polycarbazole films have been deposited successfully on different substrates by Langmuir-Blodgett technique using a mixture of dimethylsulfoxide and chloroform as spreading solution. Polycarbazole monolayers were found to remain stable on the water sub-phase. It has been observed that area per carbazole molecule for these layers did not change significantly with change in sub-phase pH. In order to make a comparative study, films were also deposited from polycarbazole mixed with octadecyl amine (ODA), using different feed ratios of polycarbazole and ODA. Deposited films of pure and ODA-mixed polycarbazole were characterized by electrochemical methods, UV-Visible (UV-Vis) spectroscopy and atomic force microscopy (AFM). UV-Vis spectroscopy confirmed the layer by layer formation of polycarbazole Langmuir-Blodgett (LB) films. Cyclic voltammograms of pure polycarbazole LB indicated their organized structure. AFM study on both kinds of LB films showed globular structure. These polycarbazole LB films were also studied for their potential for sensing ammonia gas
[en] Data on the methods of 2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indoles synthesis has been surveyed. The synthetic accessibility of various derivatives of these heterocycles has been demonstrated. It has been shown that such compounds exhibit a broad spectrum of pharmacological activity and hold interest for medicinal chemistry.