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( Mohd Amri Lajis ),( Siti Salwa Khamis ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
This study was implemented to investigate the effect of hot press forging process on different chip size (S), pre-compaction cycle (PCC), and holding time (t) in direct recycling of aluminum alloy AA6061. The mechanical properties of recycled chips were determined by measuring the ultimate tensile strength (UTS) while physical properties were studied by examining the microstructure, and recycled chips were compared with the original AA6061 aluminium billet. The experimental result indicates that hot pressed AA6061 aluminium alloy using larger S, maximum cycles of PCC, and maximum t, gave the optimum value of UTS at 122.33 MPa and 120.45 MPa respectively. It was found that larger S used with higher number of PPC and longer the t will produce better mechanical and physical properties of the recycled AA6061 chip.
Anthraquinones from Cell Suspension Culture of Morinda elliptica
Jasril, Jasril,Lajis, N.H.,Abdullah, M.A.,Ismail, N.H.,Ali, A.M.,Marziah, M.,Ariff, A.B.,Kitajima, M.,Takayama, H.,Aimi, N. The Korean Society of Pharmacognosy 2000 Natural Product Sciences Vol.6 No.1
The chemical investigation on the cell suspension culture of Morinda elliptica L. yielded eight anthraquinones, two of which, anthragallol-1,2-dimethyl ether (3) and purpurin-1-methyl ether (4), have not been isolated from the original plant. Other compounds isolated include nordamnacanthal (1), alizarin-1-methyl ether (2), rubiadin (5), soranjidiol (6), $lucidin-{\omega}-methyl$ ether (7), and morindone (8). The structures of anthraquinones were established based on spectral studies.
Chemical Constituents and Bioactivity of Curcuma aeruginosa Roxb.
Mohd. Aspollah Hj. Sukari,Suhaila Md. Saad,Nordin H Lajis,Mawardi Rahmani,Radzali Muse,Umi Kalsom Yusuf,Sugeng Riyanto 한국생약학회 2007 Natural Product Sciences Vol.13 No.3
study on the rhizomes of Curcuma aeruginosa has yielded three sesquiterpenes, whichwere identified as zedoarol (1), curcumenol (2) and isocurcumenol (3). The structures of the compounds weredetermined by Infrared Spectroscopy (IR), Nuclear Magnetic Resonance (1D and 2D NMR) and Mass Spectroscopy(MS). The crude extracts and pure compounds obtained were tested against pathogenic microbes and cancer cell linesKeywordsCurcuma aeruginosa, zedoarol, curcumenol, isocurcumenol, bioassay test
Brine Shrimp Toxicity of Fractionated Extracts of Malaysian Medicinal Plants
Mukram M. Mackeen,Mohammad N. Khan,Zainudin Samadi,Nordin H. Lajis 한국생약학회 2000 Natural Product Sciences Vol.6 No.3
The methanol, dichloromethane, petroleum ether, 90% methanol and 1-butanol fractions of 40 Malaysian medicinal plants belonging to 25 families were tested for brine shrimp lethality. Various parts and fractions of eight (20%) plants, viz. Annona muricata, Cerbera odollam. Calophyllum inophyllum, Entada phaseoloides, Pithecellobium jiringa, Crotolaria retusa, Morinda elliptica and Sellaginella willdenovii showed very strong toxicity (LC_(50):$lt;100 ppm). The methanol extract of the seed of Calophyllum inophyllum showed exceptionally toxic activity (LC_(50): 5 ppm).
Antimicrobial and Cytotoxic Activities of Some Malaysian Flowering Plants
Jasril,S. M. Mohamed,M. M. Mackeen,N. H. Lajis,A. A. Rahman,A. M. Ali 한국생약학회 1999 Natural Product Sciences Vol.5 No.4
A total of 43 extracts from 21 species of Malaysian flowering plants were screened for antimicrobial and cytotoxic activities. Antimicrobial activity was tested against fungi, including yeast and candida, as well as Gram-positive and Gram-negative bacteria, and cytotoxicity was assayed using the CEM-SS and HT-29 cell lines. The methanol extracts of the roots and stems of Plumeria acutifolia showed the highest antimicrobial activity, i.e. against Saccharomyces cerevisiae and Candida lipolytica, and mostly moderate activity against the other microbes such as Aspergillus ochraceous and Saccharomyces lipolytica. Phyllanthus emblica also showed moderate activity especially that of the methanol extracts. The methanol extract of the roots of Plumeria acutifolia showed the strongest cytotoxic activity (CD_(50)=3㎍/㎖). Most of Zingiberaceae species gave negative results for antimicrobial activity and showed low cytotoxic activity.
A. M. Ali,L. Y. Mooi,K. Yih Yih,A. W. Norhanom,K. Mat Saleh,N. H. Lajis,A. M. Yazid,F. B. H. Ahmad,U. Prasad 한국생약학회 2000 Natural Product Sciences Vol.6 No.3
The extracts of Carica papaya (flower), Barringtonia macrostachya (leaves), Coleus tuberosus (tuber), Mangifera indica (fruit skin) and Eugenia polyantha (leaves) showed strong in vitro anti-tumor promoting activity when assayed using Raji cells (Mooi et al., 1999). The anti-tumor promoting activity of the crude extracts was further analyzed by immunoblotting analysis of Raji cells carrying Epstein-Barr virus genome. The expression of early antigens diffuse (EA-D) and early antigens restricted (EA-R) was determined by performing western blotting of treated Raji cells with human sera of nasopharyngeal carcinoma patients. All the plant extracts were shown to be able to suppress both EA-D and EA-R.