The polymerization of 16 dienes with longer

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Unformatted text preview: es the polymerization of 4-methylcyclopentene (II-1) in the presence of NaBARF to give the polymer having trans-1,3-disubstituted cyclopentane rings. C2-symmetric Pd diimine complex (2) yields the polymer having similar structure with high isotacticity (r > 93%). The polymerization of 4-alkylcyclopentenes with a longer alkyl group also proceeds to give polymers with trans-fused 1,3-cyclopentane rings located at regulated intervals along the linear polymer chain. Polymers obtained by 1 show good solubility in CHCl3 at room temperature, whereas those obtained by 2 show low solubility in organic solvent, which indicates high isospecificity of the polymerization catalyzed by 2. Isotactic poly(II-n)s obtained by 2/NaBARF show liquid crystalline properties, although they do not have polar functionalized groups or aromatic structure. 63 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia ORAL PRESENTATION (ANALYTICAL) ANA-O1 INTERVARIETIAL VARIATION IN NUTRITIONAL AND ANTIOXIDANT POTENTIALS OF MUNGBEAN ( VIGNA RADIATA L.) AI Hussain, SAS Chatha, MS Iqbal and A Jabbar Department of Chemistry and Industrial Chemistry, Govt. College University, Faisalabad, Pakistan E-mail: ai.hussain@yahoo.com This research work was carried out to investigate the intervaratial variations in nutritional and antioxidant potential of mungbean (Vigna radiata L.). The mungbean samples after grinding were extracted using soaking and shaking methods with 100 and 80 % methanol. The proximate compositions in terms of moisture, ash, fibre and protein contents varied non -significantly with respect to various cultivars. The antioxidant potential of extracts was assessed using some antioxidant assays like estimation of total phenolic contents (TPC), total flavonoids contents (TFC), percentage inhibition of peroxidation of linoleic acid system, reducing power and DPPH free radical scavenging capacity. TPC, TFC, reducing power, % inhibition of peroxidation in linoleic acid system and DPPH radical scavenging activity of different mungbean extracts were found in range of 0.681 - 1.04 g/100 g of GAE, 1.47 – 2.22 g/100 g of CE, 0.872 - 0.981, 56.20 - 78.73 %, 16.66 – 31.47 mg/mL respectively. The amount of TPC and DPPH radical scavenging activity of different mungbe...
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