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Unformatted text preview: genus Laurencia. Members of this genus are known to be prolific producers of halogenated bioactive metabolites. Over the last 5 years, we have isolated more than 40 bioactive secondary metabolites from North Borneon Laurencia, and 50 % were of novel structure. These compounds could be structurally grouped into C15-acetogenin (9), chamigrene (6), C15-bromoallene (4), cuparane (1), and diterpenes (1). Chemical investigation of soft coral was focused on four main genus, Sinularia, Nepthea, Lobophyton, and Sarcophyton. To date, a total of 25 secondary metabolites were isolated and identified and 12 were identified as novel. These novel compounds could be classified into sterol (2) and diterpenes (10). Novel metabolites from Laurencia and soft coral showed potent biological activities against clinical bacteria and tumor cells, in various intensities. On the other hand, these metabolites could also be utilized as chemo-taxonomical markers in taxonomical systematic. 51 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia KN-12 POLYMERIC SEPARATION MEMBRANES FOR GREENHOUSE GAS RECOVERY AGAINST GLOBAL WARMING Kazukiyo Nagai Department of Applied Chemistry, Meiji University, 1-1-1 Higashi-mita, Tama-ku, Kawasaki 214-8571, Japan E-mail: firstname.lastname@example.org Membrane is an interphase between two adjacent phases acting as a selective barrier, regulating the transport of substances between the two compartments. It is employed for specific functions including separation of gases and liquids, ions, or biological matters. Membrane separation technology enjoys various advantages over conventional methodologies such as isothermal operation at low temperatures, no requirement for additives, low energy consumption and ease of integration into other se paration or reaction processes. To date, this technique has gained multidimensional significance as in air separation, nitrogen purification, natural gas separation, flue gas purification, dehydration, volatile organic compounds (VOC) recovery etc. In particular, many countries focus on both the production of hydrogen as a clean energy source and removal of carbon dioxide (CO2) to prevent gl...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11