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Optimization of Extraction Conditions for Total Phenolics and Total Flavonoids from <i>Kaempferia parviflora</i>Rhizomes

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Advances in Bioscience and Biotechnology 2018年第5期9卷 205-214页

作者： Zuraida Ab Rahman Shazwan Abd Shukor Hartinee Abbas Chandradevan A. L. Machap mohd suhaimi bin alias Razali Mirad Syairah Sofiyanand Ayu Nazreena Othman Biotechnology & amp Nanotechnology Research Centre MARDI HQ Persiaran MARDI-UPM Serdang Malaysia Horticulture Research Centre MARDI Sintok Bukit Kayu Hitam Malaysia Food Technology Research Centre MARDI HQ Persiaran MARDI-UPM Serdang Malaysia Agrobiodiversity and Environment Research Centre MARDI HQ Persiaran MARDI-UPM Serdang Malaysia Nilai Polytechnic Kompleks Pendidikan Bandar Enstek Bandar Enstek Malaysia

Kaempferia parviflora plants derived from in vitro culture were grown in the glasshouse. A comparison of the yield of total phenolics and total flavonoids under varying extraction conditions from rhizomes harvested from plants of different ages was undertaken. The results showed that phenolic and flavonoid contents in the rhizomes were highest 8 months after planting. Another study found that 2 g rhizomes extracted in 50 ml of water at 90°C for 120 minutes gave the best yield of phenolics and flavonoids. Under these conditions, an average of 210 mg GAE/g dry weight of total phenolics and 81 μg QCE/g dry weight of total flavonoids were obtained.

关键词： Phenolics Flavonoids Kaempferia parviflora Extraction

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Dimensional Stability Properties of Medium Density Fibreboard (MDF) from Treated Oil Palm (Elaeis guineensis) Empty Fruit Bunches (EFB) Fibres

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Open Journal of Composite Materials 2016年第4期6卷 91-99页

作者： Zawawi Ibrahim Mansur Ahmad Astimar Abdul Aziz Ridzuan Ramli mohd Ariff Jamaludin suhaimi Muhammed Aisyah Humaira alias Malaysian Palm Oil Board (MPOB) Biomass Technology Centre Engineering and Processing Division Jalan Sekolah Pekan Bangi Lama Kajang Malaysia Faculty of Applied Sciences Universiti Teknologi MARA Shah Alam Malaysia Department of Bio-Composite Technology Institute of Tropical Forestry and Forest Product (INTROP) Universiti Putra Malaysia Serdang Malaysia

The aim of the study was to investigate the effect of pre-treatments by using sodium hydroxide (NaOH) and acetic acid on oil palm Empty Fruit Bunch (EFB) fibres for the production of Medium Density Fibreboard (MDF). The EFB fibres were treated with chemicals in the concentration range of 0.2%, 0.4%, 0.6% and 0.8% prior to refining. Single-homogenous layer MDF with 12 mm thickness and density of 720 kg/m3 was produced. Urea-Formaldehyde (UF) was applied at 10% loading (based on dry weight of dry fibres) as a binder. The physical properties (Water Absorption (WA) and Thickness Swelling (TS)) of the produced panels were tested according to European Standard, EN 622-5:2006. The results show that types of chemical used had greater effects than concentration on the dimensional stability of the MDF. EFB fibres treated with acetic acid produced MDF with better dimensional stability compared to the MDF NaOH treated fibres. High concentration of NaOH produced poor dimensional stability in the panels.

关键词： Empty Fruit Bunch Sodium Hydroxide Acetic Acid Dimensional Stability Thickness Swelling Water Absorption

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Validation of CA-Markov for Simulation of Land Use and Cover Change in the Langat Basin, Malaysia

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Journal of Geographic Information System 2012年第6期4卷 542-554页

作者： Hadi Memarian Siva Kumar Balasundram Jamal bin Talib Christopher Teh Boon Sung alias mohd Sood Karim Abbaspour Department of Agriculture Technology Faculty of Agriculture Universiti Putra Malaysia (UPM) Serdang Malaysia Department of Forest Production Faculty of Forestry Universiti Putra Malaysia (UPM) Serdang Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia (UPM) Serdang Malaysia Swiss Federal Institute of Aquatic Science and Technology (EAWAG) Ueberlandstrasse Switzerland

Validity of CA-Markov in land use and cover change simulation was investigated at the Langat Basin, Selangor, Malaysia. CA-Markov validation was performed using validation metrics, allocation disagreement, quantity disagreement, and figure of merit in a three-dimensional space. The figure of merit, quantity error, and allocation error for total landscape simulation using the 1990-1997 calibration data were 5.62%, 3.53%, and 6.13%, respectively. CA-Markov showed a poor performance for land use and cover change simulation due to uncertainties in the source data, the model, and future land use and cover change processes in the study area.

关键词： Land Use and Cover Change CA-Markov Calibration Validation

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