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Antimicrobial activity and essential oils of Curcuma aeruginosa,Curcuma mangga,and Zingiber cassumunar from Malaysia

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Asian Pacific Journal of Tropical Medicine 2012年第3期5卷 202-209页

作者： tg siti amirah tg kamazeri Othman Abd Samah Muhammad Taher Deny Susanti Haitham Qaralleh Department of Biomedical Science Kulliyyah of ScienceInternational Islamic University MalaysiaJalan IstanaBandar Indera Mahkota25200 KuantanPahangMalaysia Kulliyyah of Pharmacy International Islamic University MalaysiaJalan IstanaBandar Indera Mahkota25200 KuantanPahangMalaysia

Objective:To analyze the chemical composition of the essential oils of Curcuma aeruginosa (***),Curcuma mangga(***),and Zingiber cassumunar(***). and study their antimicrobial ***:Essential oils obtained by steam distillation were analyzed by gas chromatography-mass speclrometry(GC-MS).The antimicrobial activity of the essential oils was evaluated against four bacteria:Bacillus cereus(***).Staphylococcus aureus(***).Escherichia coli(***).and Pseudomonas aeruginosa(***);and two fungi:Candida albicans(***) and Cyptococcus neoformans(***),using disc-diffusion and broth microdilution ***:Cycloisolongifolene,8.9-dehydro-9- formyl(35.29%) and dihydrocoslunolide(22.51%) were the major compounds in *** oil; whereas caryophyllene oxide(18.71%) and caryophyllene(12.69%) were the major compounds in *** oil:and 2,6.9,9-tetramethyl-2.6.10-cycloundecatrien-1-one(60.77%) andα-caryophyllene(23.92%) were abundant in *** *** essential oils displayed varying degrees of antimicrobial activity against all lested *** oil had the highest and most broad-spectrum activity by inhibiting all microorganisms tested,with *** being the most sensitive microorganism by having the lowest minimum inhibitory concentration(MIC) and minimum fungicidal concentration(MFC) values of 0.1μL/mL. *** oil showed mild antimicrobial activity,whereas *** had very low or weak activity against the tested ***:The preliminary results suggest promising antimicrobial properties of *** and ***,which may be useful for food preservation,pharmaceutical treatment and natural therapies.

关键词： Antimicrobial Gas chromatography-mass spectrometry Essential oil Curcuma aeruginosa Curcuma mangga Zingiber cassumunar

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Biosorption of Cu(II), Pb(II) and Zn(II) Ions from Aqueous Solutions Using Selected Waste Materials: Adsorption and Characterisation Studies

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Journal of Encapsulation and Adsorption Sciences 2014年第1期4卷 25-35页

作者： Wiwid Pranata Putra Azlan Kamari siti Najiah Mohd Yusoff Che Fauziah Ishak Azmi Mohamed Norhayati Hashim Illyas Md Isa Department of Chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Nanotechnology Research Centre Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia Serdang Selangor Malaysia

The efficacy of coconut tree sawdust (CTS), eggshell (ES) and sugarcane bagasse (SB) as alternative low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. Batch adsorption studies were carried out to evaluate the effects of solution pH and initial metal concentration on adsorption capacity. The optimum biosorption condition was found at pH 6.0, 0.1 g biomass dosage and at 90 min equilibrium time. The adsorption data were fitted to the Freundlich and Langmuir isotherm models. The adsorption capacity and affinity of CTS, ES and SB were evaluated. The Freundlich constant (n) and separation factor (RL) values suggest that the metal ions were favourably adsorbed onto biosorbents. The maximum adsorption capacities (Q) estimated from the Langmuir isotherm model for Cu(II), Pb(II) and Zn(II) were 3.89, 25.00 and 23.81 mg/g for CTS, 34.48, 90.90 and 35.71 mg/g for ES, and 3.65, 21.28 and 40.00 mg/g for SB, respectively. The characterisation studies were performed using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR). Interaction with metal ions led to the formation of discrete aggregates on the biosorbents surface. The metal ions bound to the active sites of the biosorbents through either electrostatic attraction or complexation mechanism.

关键词： Adsorption Characterisation Metal Ions Coconut Tree Sawdust Eggshell Sugarcane Bagasse

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Removal of Cu(II), Pb(II) and Zn(II) Ions from Aqueous Solutions Using Selected Agricultural Wastes: Adsorption and Characterisation Studies

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Journal of Environmental Protection 2014年第4期5卷 289-300页

作者： siti Najiah Mohd Yusoff Azlan Kamari Wiwid Pranata Putra Che Fauziah Ishak Azmi Mohamed Norhayati Hashim Illyas Md Isa 1Department of Chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia 2Nanotechnology Research Centre Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia Serdang Selangor Malaysia

The feasibility of durian tree sawdust (DTS), coconut coir (CC) and oil palm empty fruit bunch (EFB) as low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. The effects of solution pH and initial metal concentration on adsorption capacity were examined in batch experiments. The affinity and the adsorption capacity of DTS, CC and EFB were evaluated. The adsorption behaviour of Cu(II), Pb(II) and Zn(II) ions onto DTS, CC and EFB was described using Freundlich and Langmuir isotherm models. The separation factor (RL) analysis suggests that the removal of metal ions onto three agricultural wastes studied was favourable. The maximum adsorption capacities (Q) estimated from the Langmuir isotherm model for Cu(II), Pb(II) and Zn(II) were 18.42, 20.37 and 22.78 mg/g for DTS, 18.38, 37.04 and 24.39 mg/g for CC, and 26.95, 37.59 and 21.19 mg/g for EFB, respectively. The characterisation studies were carried out using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR). The surface morphology of the biosorbents changed significantly following interaction with metal ions. The primary adsorption mechanism was complexation between metal ions and binding sites of biosorbents. Both hydroxyl and amine groups are the main binding sites in DTS, CC and EFB.

关键词： Adsorption Characterisation Metals Durian Tree Sawdust Coconut Coir Oil Palm Empty Fruit Bunch

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