School of Bioprocess Engineering (Articles)http://dspace.unimap.edu.my:80/xmlui/handle/123456789/21712024-03-29T11:05:57Z2024-03-29T11:05:57ZPreliminary Studies on Antimicrobial Activity of Extracts from Aloe Vera Leaf, Citrus Hystrix Leaf, Zingiber Officinale and Sabah Snake Grass Against Bacillus SubtilisMuhammad Nur Aiman, UdaSubash C.B., GopinathNur Hulwani, IbrahimMohd Khairul Rabani, HashimNuradibah, Mohd AmerMidhat Nabil, Ahmad SalimiTan, Ewe ShenOng, Yee FenMaisara Azad, Mat AkhirUda, Hashimhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/692162020-12-31T07:02:11Z2018-01-01T00:00:00ZPreliminary Studies on Antimicrobial Activity of Extracts from Aloe Vera Leaf, Citrus Hystrix Leaf, Zingiber Officinale and Sabah Snake Grass Against Bacillus Subtilis
Muhammad Nur Aiman, Uda; Subash C.B., Gopinath; Nur Hulwani, Ibrahim; Mohd Khairul Rabani, Hashim; Nuradibah, Mohd Amer; Midhat Nabil, Ahmad Salimi; Tan, Ewe Shen; Ong, Yee Fen; Maisara Azad, Mat Akhir; Uda, Hashim
Herbal plants have several potential antimicrobial activities either as antifungal or antibacterial to fight against the disease and pathogen that attack the plants. The extractions of the Aloe vera leaf, Citrus hystrix leaf, Zingiber officinale rhizome and Sabah snake grass were selected in this study to fight against Bacillus subtilis. B. subtilis is a Gram-positive bacterium, rodshaped and catalase-positive that lives on decayed organic material. It is known as Gram-positive bacteria because of its thick peptidoglycan and would appear purple when subjected to Gram test. This species is commonly found in the upper layers of the soil, in meat or vegetables, in pastry, cooked meat, in bread or poultry products. The extracts of Sabah Snake Grass found to be most effective than A.vera leaf, Z. officinale, and C. hystrix against the B. subtilis.
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2018-01-01T00:00:00ZExtraction 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.
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2018-01-01T00:00:00ZExtraction of Spear Grass (Imperata Cylindrica) As Pro-Oxidant In Polymer BlendsNuradibah, Mohd AmerNur Hamidah, Abdul HalimKhairul Farihan, KasimSam, Sung TingHanna Ilyani, ZulhaimiMuhammad Nur Aiman, Udahttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/692002020-12-31T01:28:18Z2018-01-01T00:00:00ZExtraction of Spear Grass (Imperata Cylindrica) As Pro-Oxidant In Polymer Blends
Nuradibah, Mohd Amer; Nur Hamidah, 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.
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2018-01-01T00:00:00ZEffect of differences Methanol concentration and extraction time on the antioxidant capacity, phenolics content and bioactive constituents of Orthosiphon Stamineus extractsNoorhaslina, HashimAbdul Razak, ShaariAwang Soh, MamatSyarhabil, Ahmadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/691492020-12-23T09:22:59Z2016-01-01T00:00:00ZEffect of differences Methanol concentration and extraction time on the antioxidant capacity, phenolics content and bioactive constituents of Orthosiphon Stamineus extracts
Noorhaslina, Hashim; Abdul Razak, Shaari; Awang Soh, Mamat; Syarhabil, Ahmad
Bioactive compounds of Orthosiphon stamineus have been known to have the beneficial effects on health. Efficient extraction of these beneficial compounds is very important. The study was conducted to determine the efficiency of methanol as an extraction solvent for bioactive compound extraction of O. stamineus raw materials. Leaf sample was extracted in 25, 50 and 100% methanol and distilled water for 2, 4 and 8 hours at 40°C. The free radical scavenging activity (FRSA) method was used to determine antioxidant capacity and Follin-Ciocalteu method was used to determine samples total phenolic compounds. The quantification of bioactive constituents by using the high performance liquid chromatography (HPLC) and the standard markers was used for this analysis such as rosmarinic acid (RA), sinensetin (SEN) and 3-hydroxy-5,6,7,4-tetramethoxyflavone (TMF). The current research shows that the yield of RA concentration was high in 50% methanol extracts at 2, 4 and 8 h of extraction. For the FRSA result showed that methanol at 50% and 100% was the most effective concentration levels inhibition between 45-55% at 8 hours’ time extraction. For the total phenolic compound, the 50% methanol concentration in O. stamineus leaf had the highest value compared with 0%, 25% and 100% methanol concentration. But, it was observed that time extraction did not influence the TPC values for different concentrations of methanolic extracts. These indicated that time extraction had affected the total capacities of antioxidant and 50% methanolic extracts was the best concentration for indicated the TPC in the O. Storminess leaf.
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2016-01-01T00:00:00Z