Bangkok, Thailand
Bangkok, Thailand

Kasetsart University is a top-ranked public university in Thailand. It is ranked at number 401-500 in the world by QS. It was the first agricultural university and the third oldest university in Thailand. Kaset University was established on February 2, 1943, with the primary aims in promoting subjects related to agricultural science. To date, Kasetsart University has revised its curricula and expanded the subject areas to cover science, arts, social science, humanities, education, engineering, and architecture. Recently, the university made an attempt to include medicine and health science. Kasetsart University has seven campuses throughout Thailand, where its main and flagship campus is at Bang Khen, Bangkok. With 58,000 students enrolled it is the largest university in Thailand. Wikipedia.

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The findings of this study support the argument made by many learner autonomy scholars that the road to autonomy is a process conditioned by each individual's zone of proximal development (ZPD) and that there are different degrees of autonomy. The description of behavioural patterns found from the experiment supports this notion. The findings show that once the direction was initiated by the teacher with the help of an external structure like a course management system (CMS), the learners could organise the resources in the system autonomously, took on new learning roles that were different from those in a traditional face-to-face classroom, and eventually they could develop autonomous perceptions and behaviours as an outcome of their engagement in this blended learning environment. The data from four research tools: i.e.; questionnaire, student learning journals, interviews and classroom observation are triangulated and amalgamated to increase the validity and reliability of the findings. © 2012 Elsevier Ltd. All rights reserved.

Hasin P.,Kasetsart University
Journal of Physical Chemistry C | Year: 2014

A simple and efficient synthesis of Co2C using graphene oxide (GO) as a carbon source has been established. The procedure consists of two steps: (1) formation of a GO/Co3O4 nanocomposite via the ammonia-evaporation-induced method and (2) conversion of Co3O 4 to Co2C under a H2/N2 mixture at a low temperature (200 C). Transmission electron microscopy (TEM) analysis showed that Co2C has a crystallite size of around 5 nm and a mesoporous structure with a pore size of ca. 3-5 nm. The amphiphilic behavior of GO contributes to the high porosity, large specific surface area, and narrow pore size distribution of the Co2C. Tungsten carbide has also been successfully obtained using GO as a carbon source at a much lower temperature than that of the traditional carbothermal synthesis. Therefore, this method could be extended to the production of other important carbides with desired mesoporous features at low temperatures. © 2014 American Chemical Society.

Witoon T.,Kasetsart University
Ceramics International | Year: 2011

The carbonation-calcination looping cycle of calcium-based sorbents is considered as an attractive method for CO2 capture from combustion gases because it can reduce the cost during the capture steps compared to conventional technologies, e.g., solvent scrubbing. In this study, waste eggshell was used as raw material for calcium oxide-based sorbent production. The commercially available calcium carbonate was employed for comparison purpose. Calcination behavior, crystal type and crystallinity, surface chemistry, qualitative and quantitative elemental information, specific surface area and pore size, morphology of the waste eggshell and the calcined waste eggshell were characterized by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray fluorescence (XRF), N2 sorption analysis and scanning electron microscopy (SEM), respectively. The carbonation-calcination cycles were carried out using a TGA unit with high purity CO2 (99.999%). It was found that the carbonation conversion of the calcined eggshell was higher than that of the calcined commercially available calcium carbonate after several cycles at the same reaction conditions. This could be due to the fact that the calcined eggshell exhibited smaller particle size and appeared more macropore volume than the calcined commercially available calcium carbonate. As results, the calcined eggshell provided a higher exposed surface for the surface reaction of CO 2. © 2011 Elsevier Ltd and Techna Group S.r.l.

Klinkesorn U.,Kasetsart University
Food Reviews International | Year: 2013

This article reviews the basic principles of emulsion formation and stabilization through the electrosteric function of chitosan. Chitosan, which is a polycationic biopolymer, may act as an emulsifier and emulsion stabilizer through adsorption of the protective layer at oil-water interfaces, viscosity enhancement, and interaction with surface-active agents (e.g., surfactants, proteins, and polysaccharides). The interaction of chitosan at droplet interfaces can be associated with flocculation or electrosteric stabilization, depending on the nature and concentration of the chitosan, emulsifier characteristics, and the pH and ionic strength of solution. © 2013 Copyright Taylor and Francis Group, LLC.

The entropy generation of a fully developed laminar flow in a hexagonal duct is investigated in this study. A constant heat flux condition was applied in this analysis. Two fluids, water and engine oil, were used to study the effect of fluid properties on the entropy generation. The fluid properties were evaluated using average temperature between inlet and outlet duct sections. The aspect ratio of the hexagonal duct was varied to show its effect on the entropy generation. Attention was also given to the supplied heat flux affecting the entropy generation. Finally, the entropy generation calculated from the hexagonal duct was compared with that from rectangular and circular ducts having the same hydraulic diameter and cross-sectional area. © 2010 Elsevier Ltd.

Feldman K.S.,Pennsylvania State University | Ngernmeesri P.,Kasetsart University
Organic Letters | Year: 2011

The bis indole sponge alkaloid dragmacidin E was synthesized in racemic form over 25 steps starting from 7-benzhydroxyindole. Key steps include (a) a Witkop cyclization to facilitate construction of the indole-spanning seven-membered ring and (b) a cyclodehydrative pyrazinone synthesis that unites the two indole-containing sectors. © 2011 American Chemical Society.

Soodchomshom B.,Kasetsart University
Journal of Applied Physics | Year: 2014

The spin-valley currents in silicene-based normal/sublattice-dependent ferromagnetic/normal junction are investigated. Unlike that in graphene, the pseudo Dirac mass in silicene is generated by spin-orbit interaction and tunable by applying electric or exchange fields into it. This is due to silicon-based honeycomb lattice having buckled structure. As a result, it is found that the junction leads to currents perfectly split into four groups, spin up (down) in k- and k ′-valleys, when applying different values of the electric field, considered as a perfect spin-valley polarization (PSVP) for electronic application. The PSVP is due to the interplay of spin-valley-dependent Dirac mass and chemical potential in the barrier. The PSVP also occurs only for the energy comparable to the spin-orbit energy gap. This work reveals potential of silicene for spinvalleytronics applications. © 2014 AIP Publishing LLC.

Agency: European Commission | Branch: FP7 | Program: CP-SICA | Phase: KBBE-2007-2-5-04 | Award Amount: 7.59M | Year: 2009

Trade in aquatic products is the largest global food sector, by value, and Asia represents the main external source of aquatic products into the EU. Current EU policy supporting international trade between Asia and Europe concentrates on issues of food safety as measures of quality, whilst market-forces drive development of standards and labels that identify social and environmental parameters. This project proposes to establish an evidence-based framework to support current stakeholder dialogues organised by a third party certifier. This will contribute to harmonising standards, helping consumers to make fully informed choices with regards to the sustainability and safety of their seafood. The Ethical Aquatic Food Index, a qualitative holistic measure of overall sustainability to support consumers purchasing decisions, will be based on detailed research centred around a Life Cycle Assessment of current processes involved in ensuring aquatic products reach consumers, aligned with analyses from the sustainable livelihoods approach and systems thinking. SMEs based in the EU will participate in this project, particularly the action research phase, enhancing their relative competitiveness. By strengthening the knowledge base surrounding EU-Asia seafood trade the project will provide the evidence required to support further expansion whilst ensuring a fair deal for producers who are meeting appropriate social and environmental goals and offering a safe and sustainable product for consumers. The sectors covered represent the main aquaculture products reaching EU markets; tilapia, catfish, shrimps and prawns. Known case study stakeholders include SMEs in Bangladesh, China, Thailand and Vietnam where sustainability is essential in the face of rapid growth. The research will secondarily improve understanding of opportunities for European exports to supply the expanding middleclass in Asia. Outputs will be promoted through workshops, websites, journal and press articles.

Witoon T.,Kasetsart University
Materials Chemistry and Physics | Year: 2012

In this work, bimodal (meso-macro) porous silicas with different mesopore diameters synthesized by using rice husk ash as a low-cost silica source and chitosan as a natural template were used as a polyethyleneimine (PEI) support for CO 2 capture. Unimodal porous silica supports with equivalent mesopore diameters to bimodal porous silica supports have been prepared for purpose of comparison. Effects of different PEI contents (10, 20, 30, 40 and 50 wt%) on CO 2 sorption capacity have been systematically investigated. The porous silica supports and the PEI-loaded porous silica supports were characterized by N 2-sorption analysis, scanning electron microscopy, Fourier transform infrared spectroscopy and thermal gravimetric analysis. CO 2 sorption measurements of all PEI-loaded porous silica supports were performed at different adsorption temperatures (60, 75, 85, 90, 95 and 105 °C). At low PEI contents (10-20 wt%), the CO 2 sorption of all adsorbents was found to decrease as a function of adsorption temperature, which was a characteristic of a thermodynamically-controlled regime. A transition from the thermodynamically-controlled regime to a kinetically-controlled regime was found when the PEI content was increased up to 30 wt% for PEI-loaded unimodal porous silicas and 40 wt% for PEI-loaded bimodal porous silicas. At high PEI contents (40-50 wt%), the CO 2 capturing efficiency of the PEI-loaded bimodal porous silicas was found to be considerably greater than that of the PEI-loaded unimodal porous silicas, indicating that most of the amine groups of PEI molecules loaded on the unimodal porous silica supports was useless, and thus the appeared macroporosity of the bimodal porous silica supports could provide a higher effective amine density to adsorb CO 2. © 2012 Elsevier B.V. All rights reserved.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: SFS-20-2015 | Award Amount: 6.91M | Year: 2016

Strength2Food is a 5-year, 6.9 million project to improve the effectiveness of EU food quality schemes (FQS), public sector food procurement (PSFP) and to stimulate Short Food Supply Chains (SFSC) through research, innovation and demonstration activities. Our 30-partner consortium representing 11 EU and 4 non-EU countries combines leading academic, communication, SME and stakeholder organisations to ensure a multi-actor approach. It will undertake case study-based quantitative research to measure economic, environmental and social impacts of FQS, PSFP and SFSC. The impact of PSFP policies on balanced nutrition in schools will also be assessed. Primary research will be complemented by advanced econometric analysis of existing datasets to determine impacts of FQS and SFSC participation on farm performance and survival, as well as understand price transmission and trade patterns. Consumer knowledge, confidence in, valuation and use of FQS labels and products will be assessed via cross-national survey, ethnographic and virtual supermarket-based research. Lessons from the research will be applied and verified in 6 pilot initiatives, focusing on less-developed and transition regions. These initiatives bring together academic and non-academic stakeholder partners in action research. The six pilot actions are: a school meals initiative to improve the nutritional outcomes and economic benefits for local agri-food producers; in-store trials (undertaken with a grocery retailer) to upscale sales of local produce; a scheme to stimulate a sustainable SFSC that adds value to the fishing community; and pilot actions to expand regional food labelling; increase sales of FQS products in non-traditional markers; and improve returns to local producers at food fairs and farmers markets (via a smartphone app). Project impact will be maximised through a knowledge exchange platform, hybrid forums, school educational resources, a Massive Open Online Course and practitioner recommendations.

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