Science & Technology Asia https://www.tci-thaijo.org/index.php/SciTechAsia <p class="Default">Science &amp; Technology Asia (formerly the International Journal of Science and Technology Thammasat), first published in 1996, is a peer-reviewed, open-access journal containing original research articles, review articles and short communications in areas related to science and technology. Science &amp; Technology Asia is a forum through which scientists and experts in the fields of science and technology share and discuss their quality research. Original research articles, as well as review articles and brief papers in multidisciplinary scientific and technological fields are included in the journal.</p> <p class="Default">The journal welcomes contributions in the following areas:</p> <p class="Default"><img title="\begin{array}{ll} \text{1.} &amp; \textbf{Physical sciences:} \\ &amp; \text{Chemistry, Physics, Mathematics and Statistics.} \\ \text{2.} &amp; \textbf{Engineering:} \\ &amp; \text{Electrical Engineering, Chemical Engineering, Civil Engineering,} \\ &amp; \text{Environmental Engineering, Computer Engineering and information technology.} \\ \text{3.} &amp; \textbf{Biological sciences:} \\ &amp; \text{Biology, Zoology, Botany, Genetics, Agriculture and Ecology.} \end{array}" src="https://latex.codecogs.com/gif.latex?\begin{array}{ll}&amp;space;\text{1.}&amp;space;&amp;&amp;space;\textbf{Physical&amp;space;sciences:}&amp;space;\\&amp;space;&amp;&amp;space;\text{Chemistry,&amp;space;Physics,&amp;space;Mathematics&amp;space;and&amp;space;Statistics.}&amp;space;\\&amp;space;\text{2.}&amp;space;&amp;&amp;space;\textbf{Engineering:}&amp;space;\\&amp;space;&amp;&amp;space;\text{Electrical&amp;space;Engineering,&amp;space;Chemical&amp;space;Engineering,&amp;space;Civil&amp;space;Engineering,}&amp;space;\\&amp;space;&amp;&amp;space;\text{Environmental&amp;space;Engineering,&amp;space;Computer&amp;space;Engineering&amp;space;and&amp;space;information&amp;space;technology.}&amp;space;\\&amp;space;\text{3.}&amp;space;&amp;&amp;space;\textbf{Biological&amp;space;sciences:}&amp;space;\\&amp;space;&amp;&amp;space;\text{Biology,&amp;space;Zoology,&amp;space;Botany,&amp;space;Genetics,&amp;space;Agriculture&amp;space;and&amp;space;Ecology.}&amp;space;\end{array}">&nbsp;</p> <p class="Default">The journal publishes 4 issues a year: No. 1, January-March; No. 2, April-June; No. 3, July-September; and No. 4, October-December.</p> <p class="Default">Science &amp; Technology Asia is currently indexed in national and international online and electronic databases, including the Thai-Journal Citation Index (TCI), the ASEAN CSE Index (ACI), the Elektronische Zeitschriftenbibliothek (EZB) and Scopus.</p> <p class="Default">This journal has adopted a double-blind reviewing policy whereby both the referees and author(s) remain anonymous throughout the process.</p> <p>&nbsp;</p> Thammasat University en-US Science & Technology Asia 2586-9000 Heat Transfer Characteristics of Nanofluid Due to a Permeable Rotating Disk with Slip Effect and Thermophoresis https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171194 <p><span class="fontstyle0">The main purpose of the current study is to represent numerical simulations for magneto-nanofluid slip flow and heat transfer over a permeable rotating disk in the presence of thermophoresis and Brownian motion. To carry out the experiment, the governing nonlinear partial differential equations are converted into nonlinear ordinary differential equations by using similarity analysis and the solutions are computed through the algebra software MATLAB. The obtained results are consistent with previously available studies to a particular extent. The natures of the involved interesting parameters on the temperature and concentration are drawn graphically. The present study further computes and examines the local Nusselt Number. The emerged results may be useful for environmental, industrial and engineering phenomena.</span></p> Asiya Khatun Mohammad Mahabubur Rahman Shariful Alam ##submission.copyrightStatement## 2019-02-08 2019-02-08 1 13 Extraction and Determination of Anthraquinone from Herbal Plant as Bird Repellent https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171195 <p>The objective of this study was to compare the anthraquinone content of cassod tree leaves, golden shower pods and noni roots that were determined in the form of free anthraquinone and anthraquinone glycoside by Soxhlet and decoction extraction method. The anthraquinone compounds were identified by the Borntrager reaction. The determination of anthraquinone UV-Visible spectrophotometry at 325nm was used. The results show that the highest anthraquinone content in the golden shower pods with 70% (v/v) ethanol was 193.79mg/g dry plant. The suitable solvent for the anthraquinone glycoside extracts was 80% (v/v) ethanol for the cassod tree leaves. In the testing of birds, 1% of the extracted golden shower pods that cover the seeds for food consumption showed a lower amount than that consumed in the control group (p &lt;0.05).</p> Ruchira Khoomsab Kan Khoomsab ##submission.copyrightStatement## 2019-02-08 2019-02-08 14 20 Animation and Computer Games Design to Build Awareness of Energy Conservation https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171199 <p><span class="fontstyle0">This research is about the design of animation and computer games to build awareness of energy conservation tools. These are one of the ways that contribute to the conservation of energy because the main reason for the problems today is that people are not sufficiently aware of the need to conserve energy. Therefore, the solution to the sustainable energy question lies in educating people so that they will become much more aware of energy conservation issues. The promotion of energy conservation would seek to change people’s behavior at the age of 7-12 years old; the process of education should be used to teach people about the importance of sustainability in energy, thereby developing eco-friendly human behavior.</span> </p> Chavipa Phongthanachote Phadungsak Rattanadecho Chern Com-arch Ratthasak Prommas ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-nd/4.0 2019-02-08 2019-02-08 21 29 Pinch Analysis of a Sugarcane Wax Extraction and Purification Process https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171202 <p>This work analyzes heat integration of sugarcane wax extraction in purification plants. It focuses on the development of sugarcane wax extraction from the mud of sugar mill presses, using supercritical <img title="CO_{2}" src="https://latex.codecogs.com/gif.latex?CO_{2}"> as a solvent and ethanol as a co-solvent, with further sugarcane wax purification of 25 kg per day. To improve heat recovery for the designed heat exchanger networks (HEN), pinch analysis was applied to achieve optimal, total, external hot and cold utility demands at the optimum minimum temperature difference of <img title="15^{\circ }" src="https://latex.codecogs.com/gif.latex?15^{\circ&amp;space;}">C. Generated HEN alternatives were selected based on an incremental net present value (<img title="\Delta" src="https://latex.codecogs.com/gif.latex?\Delta">NPV). Compared to the current HEN design, the most cost-effective HEN could decrease total annual costs by a factor of 1.2.</p> Nuttawee Owat Wanwisa Skolpap ##submission.copyrightStatement## 2019-02-08 2019-02-08 30 40 Energy and Exergy Analysis of Low-Cooling in Building by using Light-Vent Pipe https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171210 <p>This study conducts the energy and exergy analysis of a light-vent pipe which is integrated into attic space. The roof is a shed roof with 30 degrees of inclination angle. The LVP is manufactured from an aluminum sheet with a translucent flat cover and is 0.15 m in diameter. The results show that the test house integrated with the LVP could well transfer heat accumulated in attic space by natural ventilation through the LVP. The natural daylight has an influent to the air mass flow rate corresponding to energy and exergy efficiency. The total energy and exergy efficiencies were 37-67% and 12.3-33%, respectively. In addition, the ceiling heat gain and exergy heat gain performed that, the requirement of space cooling of the house with LVP lower than that the reference house.</p> Dittha Nonthiworawong Phadungsak Rattanadecho Ratthasak Prommas ##submission.copyrightStatement## 2019-02-08 2019-02-08 41 53 Design and Fabrication of Deformable Microfluidic Device for the Study of Living Cells under Mechanical Solicitations https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171213 <p>Cellular symptoms present a model system for the analysis of living structures in laboratories such as metabolic studies and drug screening. In living organisms, cells are often encountered with compaction, tension, and shear. Most cells are intangible and balanced when a solid or seminal stratification (monolayer culture) is connected. In distortion reaction, cells experience intense biochemical changes. The stressed<br>cells on the culture combine in the Vivo environment, which creates dramatic shape changes and biochemical reactions. These microsystems can meet broad applications in the biomedical research field since deformation, compression or fluid flow have been found to induce biochemical changes in cells derived from various tissues. The aim of this project is to design and to develop a microfluidic device which will allow for the culturing of adhered cells in microfluidic chambers (micro-wells) while controlling, at the micro scale, the mechanical deformation applied on the substrate on which cells are attached. During this work, a Polydimethylsiloxane (PDMS) double layered microfluidic device was designed and fabricated which enables controlled micro-sized deformation of the cell culturing microwells. Moreover, a relation was found between measured deformation values and simulations.</p> Naheed Hossain Zain Hayat Abdel Illah El Abed ##submission.copyrightStatement## 2019-02-08 2019-02-08 54 62 Development of the Rapid Test Kit for the Identification of Campylobacter spp. Based on Loop-mediated Isothermal Amplification (LAMP) in Combination with a Lateral Flow Dipstick (LFD) and Gold Nano-DNA Probe (AuNPs) https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/171212 <p>The detection of <em>Campylobacter</em> spp. in meat products was developed by using loop-mediated isothermal amplification (LAMP) combined with DNA-based bioassay methods, including a lateral-flow dipstick (LFD) and gold nano-DNA probe (AuNPs) assay. The LAMP primers were designed from the conserved nucleotide regions of <em>Campylobacter</em> spp. The analytical sensitivity of the LAMP-LFD and LAMP-AuNPs analysis was 360 fg/μl. The analytical specificity of LAMP-based assays showed no cross-reactions to <em>Listeria monocytogenes</em>, <em>Salmonella Typhimurium</em>, <em>Escherichia coli</em>, <em>Bacillus cereus</em>, <em>Pseudomonas aeruginosa</em>, <em>Staphylococcus aureus</em>, <em>Enterobacter aerogenes</em>, <em>Serratia marcescens</em>, <em>Vibrio parahaemolyticus</em>, <em>Vibrio cholerae</em>, <em>Klebsiella oxytoca</em> and <em>Citrobacter diversus</em>.The sensitivity, specificity and accuracy of both LAMP-LFD and LAMP-AuNPs for the detection of pre-enrichment cultures from raw chicken meat samples were 100%, 95% and 96.67%, respectively. Since the processing time of LAMP-based assays is 60-90 minutes, it is applicable as a point-of-care screening test for food safety and as a process control of <em>Campylobacter </em>spp<em>. </em>contamination.</p> Dueantem Thongphueak Kosum Chansiri Thayat Sriyapai Supatra Areekit Somchai Santiwatanakul Piyada Wangroongsarb ##submission.copyrightStatement## 2019-02-08 2019-02-08 63 71