Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by Abdul Hamid
Total Records ( 2 ) for Abdul Hamid
  Al-Amin , Chamhuri Siwar and Abdul Hamid
  Problem Statement: Lacking of proper environmental models environmental pollution is now a solemn problem in many developing countries particularly in Malaysia. Some empirical studies of worldwide reveal that imposition of a carbon tax significantly decreases carbon emissions and does not dramatically reduce economic growth. To our knowledge there has not been any research done to simulate the economic impact of emission control policies in Malaysia. Approach: Therefore this study developed an environmental computable general equilibrium model for Malaysia and investigated carbon tax policy responses in the economy applying exogenously different degrees of carbon tax into the model. Three simulations were carried out using a Malaysian social accounting matrix. Results: The carbon tax policy illustrated that a 1.21% reduction of carbon emission reduced the nominal GDP by 0.82% and exports by 2.08%; 2.34% reduction of carbon emission reduced the nominal GDP by 1.90% and exports by 3.97% and 3.40% reduction of carbon emission reduced the nominal GDP by 3.17% and exports by 5.71%. Conclusion/Recommendations: Imposition of successively higher carbon tax results in increased government revenue from baseline by 26.67, 53.07 and 79.28% respectively. However, fixed capital investment increased in scenario 1a by 0.43% and decreased in scenarios 1b and 1c by 0.26 and 1.79% respectively from the baseline. According to our policy findings policy makers should consider 1st (scenario 1a) carbon tax policy. This policy results in achieving reasonably good environmental impacts without losing the investment, fixed capital investment, investment share of nominal GDP and government revenue.
  Ibrahim M.S. Eldeen , Abdul Hamid , K.C. Wong , M.A. Abdullah , Tengku S. Tengku-Muhammad , H.S. Abdillahi and J. Van Staden
  Background and Objective: The leaf of Homalomena sagittifolia was reported to have anti-inflammatory, antimicrobials, narcotic, violent intoxication and hallucinogen effects. This study highlights isolation, identification and biological activities of two compounds from the leaves of H. sagittifolia. Methodology: Two isolates were investigated for their inhibitory effects against cyclooxygenase and acetylcholinesterase enzymes. They were also tested for antimicrobial effects against five pathogenic bacterial strains using the micro-dilution assay. The structure of the two isolates were elucidated by interpretation of spectroscopic data and previous available reports in literature. They were identified to be trans-phytol (1) and diacylglyceroglycolipid (2). The compounds were investigated for their anti-inflammatory, anticholinergic and antimicrobial effects using the cyclooxygenase, the microplate and the antimicrobial micro-dilution assays, respectively. Results: Compound 2 possessed good activity against both COX-1 (IC50 = 38) and COX-2 (IC50 = 48). The IC50 values observed with the indomethacin were 4.1 and 181 μM against COX-1 and COX-2, respectively. The two compounds also inhibited activity of acetylcholinesterase with an IC50 values of 8.6 μM (2), 24 μM (1) and 3.3 μM (galanthamine). Compound 2 showed remarkable activity against Gram-negative bacteria Pseudomonas stutzeri and Klebsiella pneumoniae with an MIC value of 98 μM. The MIC values recorded for tetracycline were 87 and 175 μM against P. stutzeri and K. pneumonia, respectively. Conclusion: These results indicated the potential pharmacological properties of the leaves of H. sagittifolia and supported the traditional uses of the plant. Further studies are needed to understand its molecular interactions. This may lead to the development of standardized crude drugs and/or nutraceutical agents.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility