Khairul Farihan Kasim, Dr.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/657212024-03-29T09:22:53Z2024-03-29T09:22:53ZExtraction of Spear Grass (Imperata Cylindrica) As Pro-Oxidant In Polymer BlendsNuradibah, Mohd AmerN. A., Abdul HalimKhairul Farihan, KasimSam, Sung TingHanna Ilyani, ZulhaimiMuhammad Nur Aiman, Udahttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/692022020-12-31T04:48:59Z2018-01-01T00:00:00ZExtraction of Spear Grass (Imperata Cylindrica) As Pro-Oxidant In Polymer Blends
Nuradibah, Mohd Amer; N. A., Abdul Halim; Khairul Farihan, Kasim; Sam, Sung Ting; Hanna Ilyani, Zulhaimi; Muhammad Nur Aiman, Uda
Packaging material such as plastic bags is one of the main factors that contribute to the environmental pollution due to slow degradation. The usage of metal oxide as pro-oxidant has been proven to accelerate the degradation of these materials, but the excessive usage of this pro-oxidant will be harmful to the human body. Therefore, in this research, spear grass is investigated to be used as natural based pro-oxidant that can increase the degradation rate of the polymers. In terms of that, spear grass is extracted by using pressurized hot water extraction (PHWE) to obtain the metal element such as zinc (Zn) and ferum (Fe). PHWE is using water as a solvent which is highly favourable due to non-toxicity and non-flammable characteristics that make it easy to handle. Box-Behnken design is used to optimize the temperature, extraction time, and sample-to-solvent ratio to get the maximum amount of Zn and Fe concentration from the extracted spear grass. As a conclusion, the leaf of spear grass contributed the highest amount of Zn and Fe concentration. The highest amount of Zn and Fe concentration is achieved at 150 °C, 20 minutes, and 3 g of sample to 45 ml of water.
Link to publisher's homepage at https://www.matec-conferences.org/
2018-01-01T00:00:00ZEncapsulation of C. odorata extracts for antimicrobial activitySiti Nur Amylina, AzmiChe Wan Sharifah Robiah, MohamadKhairul Farihan, Kasimhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/690292020-12-16T08:32:08Z2019-01-01T00:00:00ZEncapsulation of C. odorata extracts for antimicrobial activity
Siti Nur Amylina, Azmi; Che Wan Sharifah Robiah, Mohamad; Khairul Farihan, Kasim
The purpose of this study is to investigate the relationship between the methycellulose (MC) and ethylcellulose (EC) of encapsulated C. odorata extracts (methanol and ethanol) and their antimicrobial properties against E. coli and Staphylococcus aureus. The encapsulated of C. odorata extract was prepared by solvent displacement method through
dialysis tube cellulose membrane and it was freeze-dried to obtain the suspension of
encapsulated C. odorata extract. Then, antimicrobial properties of encapsulated C. odorata
extracts was performed by broth dilution method on target bacteria. A few drops of
hydrochloric acid (HCl) were added into growth media until pH 4 to mimic the acidic
conditions in human stomach. The results showed the encapsulated methylcellulose of
methanol extract (MC-M) inhibit both bacteria types.
Link to publisher's homepage at https://iopscience.iop.org/
2019-01-01T00:00:00ZComparative Study on the Extraction Methods of Clinachanthus nutans for Total Phenolic Content, Total Flavonoid Content and DPPH Scavenging ActivityNur Syazwani, IsmailKhairul Farihan, Kasimhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/555262018-09-04T05:04:22Z2018-01-01T00:00:00ZComparative Study on the Extraction Methods of Clinachanthus nutans for Total Phenolic Content, Total Flavonoid Content and DPPH Scavenging Activity
Nur Syazwani, Ismail; Khairul Farihan, Kasim
Clinacanthus nutans, which belongs to the family of Acanthaceae is often used as herbal
remedies in complementary and alternative medicine. This study was conducted to determine
the total phenolic content, total flavonoid content and the DPPH scavenging activity of the
different parts of C. nutans (stem, leaves, and mixture of both stem and leaves) using different
type of solvents, which is absolute methanol, 80% of methanol and distilled water on
different extraction methods. The total phenolic content, total flavonoid content and DPPH
scavenging activity were evaluated using the Follin‐Ciocalteu, aluminium chloride and 2, 2‐
diphenyl‐1‐picrylhydrazyl (DPPH) free radical scavenging activity assay respectively, and
correlation of the three responses were analyzed using Principal Component Analysis. From
the results, it can be concluded that regardless the extraction method used, 80% methanol is
the most potential solvent to be used in the extraction of C. nutans compared to absolute
methanol and distilled water. However, the potential of water as the extraction solvent can
be exploited with the used of pressurised hot water extractor. Leaves and mixture of C.
nutans have a similar potential; both contain high TPC and TFC but lower DPPH activity. On the other hand, stem of C. nutans has high DPPH activity but lower TPC and TFC.
Link to publisher's homepage at http://jere.unimap.edu.my
2018-01-01T00:00:00ZLipase production from Jatropha curcas solid wasteNurul Iwani, AlawiKhairul Farihan, KasimMohamed Zulkali, Mohamed Daud, Prof. Madya Dr.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/212262012-10-05T04:16:01Z2010-10-16T00:00:00ZLipase production from Jatropha curcas solid waste
Nurul Iwani, Alawi; Khairul Farihan, Kasim; Mohamed Zulkali, Mohamed Daud, Prof. Madya Dr.
Lipases produced by using agro-industrial residual or waste as substrate become interesting topic among the researchers. The aim of this study was to produce lipases by valorization the Jatropha solid waste as substrate for fermentation. Jatropha solid waste can provide the best carbon among various carbohydrates because it is inexpensive, pure and available in mass supply. Aspergillus niger was selected by presenting the best enzymatic production. The process parameter investigated were incubation time (1-6days), initial moisture content (59.52%, 65.57%, 74.76% and 79.4%) and temperature (27oC, 30oC, 35oC, 37oC and 40oC). The highest lipase activity was achieved on the 5th day of fermentation (192.67 U/g of substrate) at 37°C, pH 8.0 and 59.52% initial substrate moisture. These results confirmed the interesting potential of solid state fermentation because the higher activities obtained in this type fermentation.
International Postgraduate Conference On Engineering (IPCE 2010), 16th - 17th October 2010 organized by Centre for Graduate Studies, Universiti Malaysia Perlis (UniMAP) at School of Mechatronic Engineering, Pauh Putra Campus, Arau, Perlis, Malaysia.
2010-10-16T00:00:00Z