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Search Results: 1 - 10 of 18 matches for " Sorada Wattana "
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Learn English or die: The effects of digital games on interaction and willingness to communicate in a foreign language
Hayo Reinders,Sorada Wattana
Digital Culture & Education , 2011,
Abstract: In recent years there has been a lot of interest in the potential role of digital games in language education. Playing digital games is said to be motivating to students and to benefit the development of social skills, such as collaboration, and metacognitive skills such as planning and organisation. An important potential benefit is also that digital games encourage the use of the target language in a non-threatening environment. Willingness to communicate has been shown to affect second language acquisition in a number of ways and it is therefore important to investigate if there is a connection between playing games and learners’ interaction in the target language. In this article we report on the results of a pilot study that investigated the effects of playing an online multiplayer game on the quantity and quality of second language interaction in the game and on participants’ willingness to communicate in the target language. We will show that digital games can indeed affect second language interaction patterns and contribute to second language acquisition, but that this depends, like in all other teaching and learning environments, on careful pedagogic planning of the activity.
Exogenous Abscisic Acid Enhances Sugar Accumulation in Rice (Oryza sativa L.) under Drought Stress
Wattana Pattanagul
Asian Journal of Plant Sciences , 2011,
Abstract: The objective of this study was to determine the effects of exogenous ABA on growth and carbohydrate metabolism in rice seedlings cv. Khao Dawk Mali 105 under drought stress. Rice seedlings were grown for 10 days and subjected to water restriction for 7 days. Drought stress caused significant reduction in shoot as well as root growth and biomass. Leaf relative water content and chlorophyll contents were reduced by drought stress. Application of exogenous ABA helps the plants by improving leaf relative water content. Drought stress also caused significant increases in sugar accumulation, accompanied by increases in sucrose phosphate synthase activities. Application of exogenous ABA enhanced sugar accumulation but decreased starch content in the leaf. The results indicated that sugar accumulation is associated with drought stress and exogenous abscisic acid can improve plant water status as well as enhances sugar accumulation under drought stress.
Factors Influencing the Success of Small and Medium Scale Manufacturing Enterprises  [PDF]
Ruankwan Intanon, Nuatip Sumkaew, Chitinout Wattana
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73028
Abstract: The aim of this study was to investigate the factors influencing the success and sustainable development of community base manufacturing enterprises in the Phitsanulok province, so as to provide fundamental information for the development of polices and guidelines governing the creation of community enterprises. Data was collected from 142 enterprise sample groups using questionnaires. Statistical analysis of the data revealed that capital (r = 0.371), accounting system (r = 0.363), external interaction (r = 0.371), information (r = 0.298) and production efficiency (r = 0.235) significantly (p < 0.01) affected the success of manufacturing enterprises. In addition, the correlation coefficient of capital and accounting system (r = 0.596), and marketing and production (r = 0.647) was highly significant (p < 0.01). The results demonstrated that the factors do not stand alone, they relate to each other. Therefore, the guidelines governing the development of community enterprise must strengthen the areas of (capital, accounting system, production efficiency and marketing), which relates to the core functions of the corporate business structure.
Effect of solvents on properties of Bombyx mori silk grafted by methyl methacrylate (MMA) and methacrylamide (MAA)
Jutarat Prachayawarakorn,Wattana Klairatsamee
Songklanakarin Journal of Science and Technology , 2005,
Abstract: Mulberry silks were chemically modified in order to increase weight gain, resulting from degumming process using graft copolymerisation technique with vinyl monomers, i.e. MMA, MAA and MMA/MAA. Due to the appearance of PMMA homopolymer granules adhered on the MMA- and MMA/MAA-grafted silk surfaces resulting in surface roughness when silk was grafted by MMA in water, the influence of grafting solvents was examined, using different water/ethanol volume ratios of 100/0, 75/25, 50/50, 25/75 and 0/100. FTIR spectra of the grafted silks presented the absorption bands of the vinyl monomers used for the grafting process. In addition, high values of % polymer add-on were obtained for all of the grafted silks. It was also found that the suitable solvents were 25/75 water/ethanol for the silk grafted by MMA and MMA/MAA, and water for the silk grafted by MAA, in order to get the smooth grafted silk surface and high polymer add-on. Moreover, all the grafted silks showed slightly greater stiffness, as indicated by the increase of Young's modulus and the decrease of elongation.
The effects of banana peel preparations on the properties of banana peel dietary fibre concentrate
Phatcharaporn Wachirasiri,Siripan Julakarangka,Sorada Wanlapa
Songklanakarin Journal of Science and Technology , 2010,
Abstract: Four different preparation methods of banana peel, dry milling, wet milling, wet milling and tap water washing, and wet milling and hot water washing were investigated on their effects on the chemical composition and properties of the banana peel dietary fibre concentrate (BDFC). The dry milling process gave the BDFC a significant higher fat, protein, and starch content than the wet milling process, resulting in a lower water holding capacity (WHC) and oil holding capacity(OHC). Washing after wet milling could enhance the concentration of total dietary fibre by improving the removal of protein and fat. Washing with hot water after wet milling process caused a higher loss of soluble fibre fraction, resulting in a lower WHC and OHC of the obtained BDFC when compared to washing with tap water. Wet milling and tap water washing gave the BDFC the highest concentration of total and soluble dietary fibre, WHC and OHC.
The Effect of Sericin from Various Extraction Methods on Cell Viability and Collagen Production
Pornanong Aramwit,Sorada Kanokpanont,Titpawan Nakpheng,Teerapol Srichana
International Journal of Molecular Sciences , 2010, DOI: 10.3390/ijms11052200
Abstract: Silk sericin (SS) can accelerate cell proliferation and attachment; however, SS can be extracted by various methods, which result in SS exhibiting different physical and biological properties. We found that SS produced from various extraction methods has different molecular weights, zeta potential, particle size and amino acid content. The MTT assay indicated that SS from all extraction methods had no toxicity to mouse fibroblast cells at concentrations up to 40 μg/mL after 24 h incubation, but SS obtained from some extraction methods can be toxic at higher concentrations. Heat-degraded SS was the least toxic to cells and activated the highest collagen production, while urea-extracted SS showed the lowest cell viability and collagen production. SS from urea extraction was severely harmful to cells at concentrations higher than 100 μg/mL. SS from all extraction methods could still promote collagen production in a concentration-dependent manner, even at high concentrations that are toxic to cells.
Screening Some Tomato Commercial Cultivars from Thailand for Salinity Tolerance
Sumalee Chookhampaeng,Wattana Pattanagul,Piyada Theerakulpisut
Asian Journal of Plant Sciences , 2007,
Abstract: Hydroponically-grown seedlings of thirteen commercial tomato cultivars and breeding lines were exposed to 0 (control) and 200 mM NaCl (salt stress) for ten days. Salt tolerance was evaluated based on visual appearance of plant damage and the plants were assigned the scale from 1 (most tolerant) to 4 (most sensitive). The salinity scales ranged from 1.00-3.75. All genotypes responded to salt by an accumulation of Na+, reduction in K+, Ca2+, N and shoot/root dried weight and a small increase in P. Salinity tolerance scales, ion concentration and shoot/root dried weight differed greatly among tomato genotypes. Highest correlation was found between salinity tolerance scale classes and the reduction in root dried weight, followed by the reduction in shoot dried weight, Na+ concentration, Ca2+ /Na+ and K+/Na+ ratios. The amount of N and P content did not correlate with salinity scale classes. In general, Na+ concentration and the reduction in root/shoot dried weight were the most reliable parameters useful for screening salt tolerance of tomato at the vegetative stage.
Bose-Einstein condensates in multiple well potentials from a variational path integral
Wattana Ratismith,Holger Hauptmann,Walter T. Strunz
Physics , 2014,
Abstract: We apply a path integral variational approach to obtain analytical expressions for condensate wave functions of an ultracold, interacting trapped Bose gases. As in many recent experiments, the particles are confined in a 1D or 3D harmonic oscillator trap which is superimposed by a periodic potential in one direction. Based on the first order cumulant expansion with respect to a harmonic trial action, and emplyoing a mean-field approximation, optimal variational parameters are obtained by minimizing an analytical expression for the ground state energy. Our largely analytical results for energy and condensate wave function are in good agreement with fully numerical calculations based on the Gross-Pitaevskii equation.
Orthosiphon versus Placebo in Nephrolithiasis with Multiple Chronic Complaints: A Randomized Control Trial
Amorn Premgamone,Pote Sriboonlue,Srinoi Maskasem,Wattana Ditsataporncharoen,Bungornsri Jindawong
Evidence-Based Complementary and Alternative Medicine , 2009, DOI: 10.1093/ecam/nem141
Abstract: Nephrolithiasis in the communities of Northeast Thailand frequently presents with multiple chronic health complaints, i.e. myofascial pain, back pain, dyspepsia, arthralgia, headache, fatigue, frank paresthesia, dysuria and any of these aggravated by purine-rich food (PRF). We assessed the efficacy of Orthosiphon in treating subjects with at least two active symptoms and negative for urine white blood cells. Subjects were randomly allocated to two groups. Crude extract of Orthosiphon given in a capsule (equivalent to 1.6–1.8 g of dried leaves of Orthosiphon) two times a day to Group 1 (n = 36) and a placebo to Group 2 (n = 40) for 14 days. The medication for each subject was packed and its code kept secret until the data analysis. Both groups were asked not to consume any of 25 purine-rich foods (PRFs) during treatment. The primary measure was the reduced sum of active severity symptoms as recorded using the visual analog scale before and after therapy (i.e. on day 7 and 14). The data on 76 subjects were processed. The mean of the total scores (95% CI) of the symptoms in each group were decreased significantly (P < 0.001); 185.6 (153.3, 218.0) to 94.7 (58.2, 131.2) in the Orthosiphon group and 196.1 (164.4, 227.8) to 89.6 (62.8, 116.5) in the placebo group. When comparing between groups, no statistically significant difference was found. The mean consumption in PRFs was significantly decreased (P < 0.001) in both groups; however, Orthosiphon did not have additional benefit over placebo at 7 and 14 days of treatment during which they reduced these foods.
Steam reforming of bio-ethanol over Ni on Ce-ZrO2 support: Influence of redox properties on the catalyst reactivity
Wattana Singhto,Navadol Laosiripojana,Suttichai Assabumrungrat,Sumittra Charojrochkul
Songklanakarin Journal of Science and Technology , 2006,
Abstract: The steam reforming of ethanol over Ni on Ce-ZrO2 support, (Ni/ Ce-ZrO2) were studied. The catalyst provides significantly higher reforming reactivity and excellent resistance toward carbon deposition compared to Ni/Al2O3 under the same conditions. At the temperature above 800oC, the main products from the reforming processes over Ni/Ce-ZrO2 were H2, CO, and CO2 with small amount of CH4 depending on the inlet ethanol/steam and oxygen/ethanol ratios, whereas high hydrocarbon compounds i.e., C2H4 and C2H6 were also observed from the reforming of ethanol over Ni/Al2O3 in the range of conditions studied (700- 1000oC).These excellent ethanol reforming performances of Ni/Ce-ZrO2 in terms of stability, reactivity and product selectivities are due to the high redox property of Ce-ZrO2. During the ethanol reforming process, in addition to the reactions on Ni surface, the gas-solid reactions between the gaseous components presented in the system (C2H5OH, C2H6, C2H4, CH4, CO2, CO, H2O, and H2) and the lattice oxygen (Ox) on Ce-ZrO2 surface also take place. Among these redox reactions, the reactions of adsorbed surface hydrocarbons with the lattice oxygen (Ox) (CnHm + Ox → nCO + m/2(H2) + Ox-n) can eliminate the formation of high hydrocarbons (C2H6 and C2H4), which easily decompose and form carbon species on Ni surface (CnHm→ nC + m/2H2).
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