Biotechnology Commons^™

Investigation On The Behavior Of Rigid Polyvinylchloride Pipes Subjected To Uniaxial Compression Loads, Alhamati Abdullah Ali Nasser, Ghazali Abdul Halim, Norzaie Jamalodin

ASEAN Journal on Science and Technology for Development

The objective of this research was to investigate the capability of rigid Polyvinylchloride (PVC-U) pipes to sustain axial loads. The behavior of PVC-U pipes specimens subjected to short-term uniaxial compression loads were experimentally investigated. Results of the load-displacement tests on pipes of different wall thickness, diameter, and specimen heights were recorded. The experimental test results show that the PVC-U pipes are capable of supporting loads greater than the required design load (3.4 kN). Increasing the pipe specimen height decreases the pipe strength for supporting the axial loads. Euler buckling was observed in the pipe specimens with small diameter and long …

Effectiveness Of Selected Entomopathogenic Fungi In Packed Rice Grain At Room Temperature Against Corcyra Cephalonica Stainton, Samodra Hendrawan, Ibrahim Yusof Bin

ASEAN Journal on Science and Technology for Development

Eight isolates of entomopathogenic fungi were evaluated as dried conidia against the rice moth, Corcyra cephalonica. In bioassays two isolates of Beauveria bassiana (BbGc and BbPs) and one isolate of Metarhizium anisopliae (MaPs) consistently gave high mortality to C. cephalonica larvae. Formulations in either kaolin, talc or tapioca flour (20 % w/w a.i.) thoroughly mixed with long grain rice in plastic cups (8 cm diameter by 5 cm) gave complete larval mortality by the 12th day of treatment. However, in general those formulated in kaolin and talc were more efficacious and faster to kill compared to those formulated in tapioca …

Crossflow Ultrafiltration For Removing Direct-15 Dye From Wastewater Of Textile Industry, Ahmad A.L., Puasa S.W., Abiding S.

ASEAN Journal on Science and Technology for Development

Ultrafiltration membrane was used to treat the effluent from textile industries. Crossflow ultrafiltration using GN polymeric membrane was used to remove the dye from textile effluent. A synthetic textile effluent of Direct-15 dye was used. The study focused through the effect of feed concentration, transmembrane pressure and solution’s pH on the permeate flux and percentage of dye removal were investigated. Dye concentration had significant effects on flux values. Under the fixed pressures and pH, the flux decreased while the dye rejection increased with increasing feed concentration. Transmembrane pressure also had significant effect on flux values. Under the fixed feed concentration …

Mitochondrial Reactive Oxygen Species In Lipotoxic Hearts Induces Post-Translational Modifications Of Akap121, Drp1 And Opa1 That Promote Mitochondrial Fission, Kensuke Tsushima, Heiko Bugger, Adam R. Wende, Jamie Soto, Gregory A. Jenson, Austin R. Tor, Rose Mcglauflin, Helena C. Kenny, Yuan Zhang, Rhonda Souvenir, Xiao X. Hu, Crystal L. Sloan, Renata O. Pereira, Vitor A. Lira, Kenneth W. Spitzer, Terry L. Sharp, Kooresh I. Shoghi, Genevieve C. Sparagna, Eva A. Rog-Zielinska, Peter Kohl, Oleh Khalimonchuk, Jean E. Schaffer, E. Dale Abel

Department of Biochemistry: Faculty Publications

Rationale: Cardiac lipotoxicity, characterized by increased uptake, oxidation and accumulation of lipid intermediates, contributes to cardiac dysfunction in obesity and diabetes. However, mechanisms linking lipid overload and mitochondrial dysfunction are incompletely understood.

Objective: To elucidate the mechanisms for mitochondrial adaptations to lipid overload in postnatal hearts in vivo.

Methods and Results: Using a transgenic mouse model of cardiac lipotoxicity overexpressing long-chain acyl-CoA synthetase 1 in cardiomyocytes, we show that modestly increased myocardial fatty acid uptake leads to mitochondrial structural remodeling with significant reduction in minimum diameter. This is associated with increased palmitoyl-carnitine oxidation and increased reactive oxygen species (ROS) generation …

Pre-Determination Of Manufacturing Costs Of Injection Moulded Part Design, Shing Ong Nan

ASEAN Journal on Science and Technology for Development

Pre-Determination of Manufacturing Costs of Injection Moulded Part Design

Adaptive Finite Element Technique For Viscous Flow Analysis, Dechaumphai Pramote, Sikkhabandit Supatpong

ASEAN Journal on Science and Technology for Development

Adaptive Finite Element Technique For Viscous Flow Analysis

Data Mining: Concept, Aplications And Techniques, Guohua Wang, Francis E. H

ASEAN Journal on Science and Technology for Development

Data Mining: Concept, Aplications and Techniques

Modification Os Rbf Network Architecture, Mashor Mohd Yusoff

ASEAN Journal on Science and Technology for Development

Modification os RBF Network Architecture

Molecular Polarisabilities And Orientational Order Parameters Od Binary Mesophase Mixtures Of Nematic Compounds, Murthy Y. Narashima, Murthy V. R

ASEAN Journal on Science and Technology for Development

Molecular Polarisabilities and Orientational Order Parameters od Binary Mesophase Mixtures of Nematic Compounds

Role Of Sawdust In The Removal Of Iron From Aqueous Solution, Senin H.B., Subhi O., Rosliza R., Kancono N., Azhar M.S., Hasiah S., Nik W.B. Wan

ASEAN Journal on Science and Technology for Development

Sawdust, inexpensive material has been utilized as an absorbent for the removal of iron from aqueous solution for their safe disposal. The adsorption experiments of untreated sawdust (SD) and treated sawdust (SDC) have been carried out at room temperature using the batch test. The Langmuir and Freundlich isotherms were used to observe sorption phenomena of sawdust in the removal of iron. The results indicate that the sawdust was capable in removing iron in aqueous solution. The results have shown that the Langmuir isotherm was found well fitted into the experimental data as compared to the Freundlich isotherm. It was found …

Metal Composites Behaviour Under Biaxial Stresses, Jai J., Berhan M.N.

ASEAN Journal on Science and Technology for Development

For this study, different volume fraction (vol.%) of particulate alumina (Al2O3)reinforced aluminium alloy (Al 6061) with 5 vol.%, 15 vol.% and 25 vol.% are produced by powder metallurgy method. These samples were subjected to biaxial stresses in order to investigate the behaviour of the metal matrix composites (MMCs). Microstructure analysis on the individual sample before and after loading was performed under scanning electron microscopy. The small particles of 2 µm in size have exhibited strong interfacial bonding with the matrix. The particles of 5 µm in size have shown fractures and debonding interface. Large particles of above 20 µm in …

Effect Of Engine Speed On Performance Adn Emissions Of A Dual Chamber Spark Ignition Engine, Rangkuti Chailulillah

ASEAN Journal on Science and Technology for Development

Effect of Engine Speed on Performance adn Emissions of a Dual Chamber Spark Ignition Engine

Application Of A Line Source Air Quality Model To The Study Of Traffic Carbon Monoxide In Brunei Darussalam, Hassan Hasnah, Singh M. P, Gribben R. J, Srivastava L. M, Radojevic M, Latief Azhar

ASEAN Journal on Science and Technology for Development

Application of a Line Source Air Quality Model to The Study of Traffic Carbon Monoxide in Brunei Darussalam

The Influence Of Culturae On Innovarive Behaviour And Management In Singapore, Yap C.M, Buisson D.H, Garrett T.C

ASEAN Journal on Science and Technology for Development

The Influence of Culturae on Innovarive Behaviour and Management in Singapore

A Fuzzy Logic Based Method For Analysing Test Results, Vinh Le Xuan, Quan Tran Hong

ASEAN Journal on Science and Technology for Development

Network operators must perform many tasks to ensure smooth operation of the network, such as planning, monitoring, etc. Among those tasks, regular testing of network performance, network errors and troubleshooting is very important. Meaningful test results will allow the operators to evaluate network performanceof any shortcomings and to better plan for network upgrade. Due to the diverse and mainly unquantifiable nature of network testing results, there is a needs to develop a method for systematically and rigorously analysing these results.In this paper, we present STAM (System Test-result Analysis Method) which employs a bottom-up hierarchical processing approach using Fuzzy logic. STAM …

A New Triterpene Glycoside From The Sea Cucumber Holothuria Scabra Collected In Vietnam, Thanh Nguyen Van, Dang Nguyen Hai, Kiem Phan Van, Cuong Nguyen Xuan, Huong Hoang Thanh, Minh Chau Van

ASEAN Journal on Science and Technology for Development

Bioassay guided fractionation led to the isolation of a new triterpene glycoside, holothurinogenin B (1) along with three known compounds, holothurin B (2), holothurin A (3), and holothurin A2 (4), from the methanol extract of the Vietnamese sea cucumber Holothuria scabra. Their structures were deduced from the spectral analysis (1D-NMR, 2D-NMR, MS) and chemical evidences.

Characteristics Of Solid-State Calcium Ion Sensors Based On Photocurable And Selfplasticising Polyacrylate Matrices, Heng Lee Yook, Hall Elizabeth A.H.

ASEAN Journal on Science and Technology for Development

New membrane materials based on cross-linked poly(n-butyl acrylate) (nBA), have been used successfully as calcium ion-selective membranes. These membrane materials possess selfplasticising property and hence do not require plasticisers. The photocurability and good adhesion characteristics of these polymer matrices enable workable solid-state calcium ion sensors to be fabricated by simple photocure procedures employing the calcium ionophore ETH5234 and a lipophilic additive as ion sensing components. The calcium ion-selectivity of the sensors can be controlled by varying the chemical composition of the photocured membrane. An optimum amount of the cross-linker 2,2-hexanedioldiacrylate (HDDA) and the incorporation of n-heptyl acrylate (nHA) led to …

Synthesis And Characterization Of Pure-Silica- Zeolite-Beta Membrane, Fong Yeong Yin, Bhatia Subhash

ASEAN Journal on Science and Technology for Development

The semiconductor industry needs low dielectric constant (low k-value) materials to more advance microprocessor and chips by reducing the size of the device features. In fabricate this context, a new material with lower k value than conventional silica ( k = 3.9 - 4.2 ) is needed in order to improve the circuit performance. As per the recent International Semiconductor Technology plan, a low-k material with a k = 1.6 will be needed by 2010. The choice of the inorganic zeolite membrane is an attractive option for low k material and suitable for microprocess application. In the present study, a …

The Safety Of Building Structures Subject To Unusual Natural And Man-Made Disasters, Pho Nguyen Van

ASEAN Journal on Science and Technology for Development

Previously, we often use the statistical data on natural disasters and mathematical tools such as probabilistic theory, mathematical statistics and random processes to express and analyze natural disasters' phenomena when dealing with the safety problem of building structures subject to natural disasters. However, due to unusual change of the global climate, natural disasters have changed essentially the intensity, frequency and the appearing time so we cannot rely on the statistical data on natural disasters in the past to do that. Therefore, renovation of the thought on selection of plans, calculation, design, and evaluation of safety of building structures to accommodate …

Source For Gloxinia (Sinningia Spp.) And Potato (Solanum Tuberosum) Micropropagation, Tan Nhut Duong, Ngoc Huong Mai Thi

ASEAN Journal on Science and Technology for Development

An efficient lighting system (Compact 3U) was successfully applied to the micropropagation of gloxinia and potato plants. To compare the in vitro growth of plantlets under Neon and Compact 3U lighting systems, gloxinia and potato shoots were cultured on suitable media at different light intensities: (1) 45 µmol m-2s-1 (under Neon lighting system as a control); (2) 45 µmol m-2s-1, (3) 60µmol m-2s-1, and (4) 75 µmol m-2s-1 (under Compact 3U lighting systems). The results obtained after 3 weeks of in vitro culture and 6 weeks of acclimatization in a greenhouse showed that the growth of plantlets cultured under the …