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Walailak Journal of Science and Technology
ISSN 1686-3933 · Walailak University · 1,027 articles in the index
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Journal Article
Simulations of High Non-Uniform Electric Field in Dielectric Barrier Electrode System
An electric field in the dielectric barrier electrode system is necessary for ozone production because ozone is produced by the electric discharge of O2 under a high-intensity electric field. The gas discharge plasmas contain energetic particles, such as electrons, ions, atoms, and radicals. The…
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Journal Article
Analysis of Platelet Shape Al2O3 and TiO2 on Heat Generative Hydromagnetic Nanofluids for the Base Fluid C2H6O2 in a Vertical Channel of Porous Medium
An analytical investigation is performed on the unsteady hydromagnetic flow of nanoparticles Al2O3 and TiO2 in the EG base fluid through a saturated porous medium bounded by two vertical surfaces with heat generation and no-slip boundary conditions. The physics of initial and boundary conditions is…
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Journal Article
Enrichment a Study of Structural, Optical and Dielectric Properties of Mowiol 4-88 (Pva) Filled Zno Nanocomposites
The use of ZnO nanoparticles in the fabrication of PVA (Mowiol 4-88) nanocomposites with different ‘x’ filling compositions through solvent casting technique leading to the enrichment of the host's physical properties is presented. The sol-gel approach synthesizes Zinc Oxide (ZnO) nanoparticles…
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Journal Article
Changes in Physico-Chemical and Microbiological Properties in Thai Cocoa Bean Fermentation
The purpose of this research is to investigate the quality-related physical, chemical, and microbiological changes in Thai cocoa beans during fermentation in 2 types of wooden containers. The results will compose a book of guidelines for good Thai cocoa fermentation in order to educate Thai…
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Journal Article
Isolation and Identification of Cellulolytic Bacteria Symbiont from Various Termites on Different Nest Type in Bukit Baka Bukit Raya National Park, West Kalimantan, Indonesia
The microbial symbiotic community in the digestive tract of termites is reportedly influenced by the taxonomy and feeding habit of the host. Both factors are strongly correlated with the nest type. This study aimed to isolate the cellulolytic bacteria from termite’s digestive tract on different…
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Journal Article
CMOS Realizable and Highly Cascadable Structures of First-Order All-Pass Filters
Two novel resistorless structures of a first-order voltage-mode all-pass filter are presented in the paper. Both the structures employ a fully differential second-generation current conveyor (FDCCII) as the primary active element, in addition to an active resistor. A grounded capacitor is the only…
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Journal Article
Real-Time Prediction of the COVID-19 Epidemic in Thailand using Simple Model-Free Method and Time Series Regression Model
The novel coronavirus 2019 (COVID-19) pandemic was declared a global health crisis. The real-time accurate and predictive model of the number of infected cases could help inform the government of providing medical assistance and public health decision-making. This work is to model the ongoing…
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Journal Article
Mode of Action and Antibacterial Activity of Ethanolic Ant Plant Tuber Extract Inhibiting Growth of Staphylococcus aureus and Escherichia coli
The present study aimed to investigate the activity of Hydnophytum formicarum Jack (Ant Plant) tuber extract against Staphylococcus aureus and Escherichia coli and the mode of action of the extract on bacterial responses. The antibacterial activity was determined using agar well diffusion method…
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Journal Article
A Study of Optimum Formula for Healthy Thai Jelly Sugar Candy Production
This research developed healthy Thai jelly sugar candy (TJSC) products with a mixture design. Physical properties and sensory acceptance by untrained panelists were investigated. The results showed that the suitable ratio of coconut milk, sugar, and wheat flour were 60, 30, and 10 %, respectively…
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Journal Article
On Fully Closed Stable Modules
In this paper, we studied the notion of the fully closed stable module and identified some basic properties of this notion. We also investigated some concepts which are related to this module. In addition, the notion of CL-duo and fully closed stable modules were also studied. HIGHLIGHTS • Studying…
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Journal Article
Cloning, Expression and Structural Modeling of the MlrA Protein from Novosphingobium sp. KKU25s for Microcystin Degradation
MlrA is a gene involved in the degradation of toxic cyanobacterial microcystins. This gene encodes microcystinase, mlrA, the 1st enzyme in the pathway that breaks down toxic cyanobacterial microcystins. In this study, primers were designed, and polymerase chain reaction (PCR) was performed to…
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Journal Article
Spatial Modelling of Covid-19 Confirmed Cases in Kalimantan, Indonesia: How Neighborhood Matters?
The Covid-19 outbreak has hit all countries across the globe, including Indonesia, in which the impact is detrimental and costly. We investigated 14 determinants that could spatially influence Covid-19 cases in Central Kalimantan and South Kalimantan provinces in mid-2020 by using the…
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Journal Article
Secure Online Voting System using Visual Cryptography
The development of a secure online voting system using visual cryptography is highly essential for present voting systems. Based on the current requirements and design aspects of an existing online voting system, emerging technologies are required in online voting schemes, and these are examined in…
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Journal Article
Xylia xylocarpa (Roxb.) Taub. Leaves Ameliorates Inflammation and Pain in Experimental Mice and Computer-Aided Model
Xylia xylocarpa (Roxb.) Taub. is traditionally used to treat several diseases, including leprosy, wound healing, gonorrhea, rheumatism, anemia, diarrhea and ulcer. This study evaluated the anti-inflammatory and anti-nociceptive activities of methanolic extract of Xylia xylocarpa leaves (MEXX) via…
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Journal Article
The Profile Analysis of Lactic Acid Bacteria (LAB) from Sumbawa White Honey and Its Potential Producing Antibacterial Compounds
Honey acts as an antibacterial without side effects, and also contains antiseptic substances which function to inhibit bacterial growth. This study aimed to isolate the Lactic Acid Bacteria (LAB) in Sumbawa white honey and the bioactive compounds produced as pathogenic antibacteria. The 1st stage…
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Journal Article
Microencapsulation of Lactobacillus rhamnosus GG with Resistant Starch and Xanthan Gum
Microencapsulation is the most common method in improving probiotic survivability against adverse conditions. In this research, resistant starch was incorporated as prebiotic coating material during the microencapsulation of Lactobacillus rhamnosus GG (LGG) in calcium alginate beads coated with…
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Journal Article
Understanding the First and the Second Waves of the COVID-19 in Germany: Is our Social Behavior Enough to Protect us from the Pandemic?
Like other European countries, Germany has experienced the 2nd wave of the COVID-19 amid obligations of social distancing and wearing of face masks in public spaces. Although Germany successfully contained the virus during the 1st wave, it has faced difficulties in controlling the COVID-19 during…
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Journal Article
Anti-inflammatory and Anti-arthritic Potentials of Maesa Montana Roots
Maesa Montana is a flowering plant of the Myrsinaceae family, which is locally known as ramjani. The current study aimed to evaluate the in-vitro anti-arthritic and anti-inflammatory activities of the root extract of this plant. The anti-inflammatory performances were measured by the hindrance of…
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Journal Article
Non-negative Solutions of the Nonlinear Diophantine Equation (8^n)^x + p^y=z^2 for Some Prime Number p
In this paper, we explain all non-negative integer solutions for the nonlinear Diophantine equation of type 8x + py = z2 when p is an arbitrary odd prime number and incongruent with 1 modulo 8. Then, we apply the result to describe all non-negative integer solutions for the equation (8n)x + py = z2…
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Journal Article
Influence of Chained Masonry on the Seismic Response of Reinforced Concrete Buildings
The influence of chained masonry walls, which represents a special case of masonry infill without gap, on the seismic response of reinforced concrete buildings is extremely important due to their wide use in this type of building. We can consider the period of building as the key parameter to study…
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