Burapha UniversityChonburi

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Burapha UniversityChonburi

Science, Thailand
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Singhato A.,Burapha UniversityChonburi | Banjong O.,Mahidol UniversityNakhon Pathom | Charoonruk G.,Mahidol UniversityNakhon Pathom
Journal of Ethnic Foods | Year: 2017

Background Inadequate calcium intake is the most chronic problem commonly found in Thai population that affects the health status throughout their life. Food fortification has been proven to be effective in promoting sufficient nutrient consumption according to the recommended daily intake. Hence, offering fortified food which is familiar and acceptable to people based on their tradition, ethnic, and cultural norms will help them to easily accept as well as being satisfied with the developed fortified food recipe, leading to the improved household food security. Methods This report was a quasi-study aimed to develop effective and acceptable educational media modules (educational videos) on a calcium-fortified Thai snack, a brown rice crispy golden curl, Thong Pub. The effectiveness of the developed educational media modules were evaluated by 50 participants who completed the self-administered questionnaires with designated knowledge scores before and after learning from the media modules. Results Results indicated most participants significantly improved their knowledge on calcium-fortified Thong Pub practice. In addition, the developed educational media modules were deemed satisfactory and acceptable by participants. Conclusion In conclusion, the developed media animation modules are effective and acceptable for educating people on the cooking methods of calcium-fortified Thongpub. © 2017 Korea Food Research Institute

Vongsak B.,Burapha UniversityChonburi | Kongkiatpaiboon S.,Thammasat UniversityPathum Thani | Jaisamut S.,Burapha UniversityChonburi | Machana S.,Burapha UniversityChonburi | Pattarapanich C.,Burapha UniversityChonburi
Brazilian Journal of Pharmacognosy | Year: 2015

The chemical component and biological activity of propolis depend on flora area of bee collection and bee species. In the study, the propolis from three stingless bee species, Lepidotrigona ventralis Smith, Lepidotrigona terminata Smith, and Tetragonula pagdeni Schwarz, was collected in the same region of mangosteen garden from Thailand. Total phenolic content, alpha glucose dase inhibitory effect, and free-radical scavenging activity using FRAP, ABTS, DPPH assays were determined. The most potent activity of propolis extract was investigated for bioactive compounds and their quantity. The ethanol extract of T.pagdeni propolis had the highest total phenolic content 12.83 ± 0.72 g of gallic acid equivalents in 100 gof the extract, and the strongest alpha glucosidase inhibitory effect with the IC50of 70.79 ± 6.44 µg/ml. The free-radical scavenging activity evaluated by FRAP, ABTS, DPPH assays showed the FRAP value of279.70 ± 20.55 µmol FeSO4equivalent/g extract and the IC50of 59.52 ± 10.76 and 122.71 ± 11.76 µg/ml, respectively. Gamma- and alpha-mangostin from T. pagdeni propolis extract were isolated and deter-mined for the biological activity. Gamma-mangostin exhibited the strongest activity for both alphaglucosidase inhibitory effect and free-radical scavenging activity. Using HPLC quantitative analysis method, the content of gamma- and alpha-mangostin in the extract was found to be 0.94 ± 0.01 and2.77 ± 0.08% (w/w), respectively. These findings suggested that T. pagdeni propolis may be used as a moresuitable raw material for nutraceutical and pharmaceutical products and these mangostin derivatives as markers. © 2015 Sociedade Brasileira de Farmacognosia. Published by Elsevier Editora Ltda. All rights reserved.

Sanhawong W.,Burapha UniversityChonburi | Banhalee P.,Burapha UniversityChonburi | Boonsang S.,King Mongkut's University of Technology Thonburi | Kaewpirom S.,Burapha UniversityChonburi
Industrial Crops and Products | Year: 2017

Eco-friendly starch biofoams derived from natural rubber were fabricated in this study. To overcome their two main shortcomings, i.e., lack of flexibility and susceptibility to moisture, cotton fiber and concentrated natural rubber latex (CNRL) were incorporated into the biofoam products. Cotton-fiber-reinforced cassava starch biofoams were successfully prepared by compression molding using water as the solvent, a processing aid, and a blowing agent. The morphology and the physical, flexural, and thermal properties of the starch biofoams as a function of the CNRL content were investigated. The moisture adsorption capacity of the foam decreased with increasing CNRL content up to 5 phr (−73.4% and −41.78% at 0 and 100% RH, respectively). With increasing CNRL content, the hydrophobicity of the biofoam increased, as evidenced by contact angle measurements; this result suggested better moisture resistance and dimensional stability. The flexural properties of the biofoams were tuned by adjusting the CNRL content. With the addition of the CNRL content of 2.5 phr, the elongation of the biofoam clearly improved by 24%, with an acceptable decrease (−2.2%) in the bending modulus. Biodegradation by the soil burial test revealed that the degradation of the biofoam mainly proceeds by hydrolysis, and the addition of CNRL retards the degradation of the biofoam. © 2017 Elsevier B.V.

Namwong L.,King Mongkut's University of Technology Thonburi | Authayanun S.,Srinakharinwirot UniversityNakhon Nayok | Saebea D.,Burapha UniversityChonburi | Patcharavorachot Y.,King Mongkut's University of Technology Thonburi | Arpornwichanop A.,Chulalongkorn University
Journal of Power Sources | Year: 2016

Proton-conducting solid oxide electrolysis cells (SOEC-H+) are a promising technology that can utilize carbon dioxide to produce syngas. In this work, a detailed electrochemical model was developed to predict the behavior of SOEC-H+ and to prove the assumption that the syngas is produced through a reversible water gas-shift (RWGS) reaction. The simulation results obtained from the model, which took into account all of the cell voltage losses (i.e., ohmic, activation, and concentration losses), were validated using experimental data to evaluate the unknown parameters. The developed model was employed to examine the structural and operational parameters. It is found that the cathode-supported SOEC-H+ is the best configuration because it requires the lowest cell potential. SOEC-H+ operated favorably at high temperatures and low pressures. Furthermore, the simulation results revealed that the optimal S/C molar ratio for syngas production, which can be used for methanol synthesis, is approximately 3.9 (at a constant temperature and pressure). The SOEC-H+ was optimized using a response surface methodology, which was used to determine the optimal operating conditions to minimize the cell potential and maximize the carbon dioxide flow rate. © 2016 Elsevier B.V.

Dongbang W.,Burapha UniversityChonburi | Pirompugd W.,Burapha UniversityChonburi
International Journal of Agricultural and Biological Engineering | Year: 2015

The present study investigated the drying kinetics of anchovy experimentally using centrifugal fluidized bed technique. The main purpose was to experimentally investigate the effect of the inlet air temperature on the drying kinetics of anchovy in a centrifugal fluidized bed dryer, to fit the experimental data to the widely used mathematical models of drying. Further, the effective moisture diffusivity and activation energy in anchovy drying were investigated in the current work. The drying experiment was conducted at drying air temperatures ranging over 70-120°C. The air velocity and rotating speed of the air-distributor were fixed at 1.5 m/s and 150 r/min, respectively. Pressure drop across bed was approximately 390 Pa, while the layer height was fixed at approximately 2 cm. The anchovies were dried starting from 412% db down to 16% db; drying time ranged from 64 min to 172 min. It was found that the drying temperature was a significant factor in decreasing the moisture content, moisture diffusivity and drying time. The moisture diffusivity and activation energy were investigated at 0.11×10-9-0.25×10-9 m2/s and 20.32 kJ/mol, respectively. When compared to existing models, the Midilli model proved to be in good agreement with change in moisture ratio. © 2015, Chinese Society of Agricultural Engineering. All rights reserved.

Jaratjaroonphong J.,Burapha UniversityChonburi | Tuengpanya S.,Burapha UniversityChonburi | Ruengsangtongkul S.,Burapha UniversityChonburi
Journal of Organic Chemistry | Year: 2015

In this paper, N-Boc and N-Cbz protected α-branched amines are synthesized directly from commercially available aromatic/heteroaromatic compounds, aldehydes, and tert-butyl or benzyl carbamate bearing a variety of substituents. Bismuth(III) triflate is found to be a highly effective catalyst for this one-pot, three-component coupling reaction. In addition, the use of mild reaction conditions, low catalytic loading, easy removal of the N-protective group, and one-step synthesis under "open-flask" are advantages of the present procedure. © 2014 American Chemical Society.

Potipat J.,Burapha UniversityChonburi | Potipat J.,Rambhai Barni Rajabhat University | Tangkrock-Olan N.,Burapha UniversityChonburi | Helander H.F.,Gothenburg University
EnvironmentAsia | Year: 2015

The sediment samples from 24 stations in coastal area of Chanthaburi Province were collected during March 2012 to March 2013 and analyzed for heavy metal contents (Pb,Cd, Ca, Fe, Cu and Zn), pH, onganic matters and grain sizes. The correlation analyses showed that heavy metal conceatrntions were affeeted by the content of organic matter and the size of clay particles. The evoluation of the quality of sediment was carried out using the geoaccumulation index (Igeo)and the enrichment factor (EF) as well at the comparison with those in t4e Thailand’s sediment quality guideiine (SQG) values. The results oe the geoaccumulation index and the enrichment factor values of the heavy metals content in the sediments revealed that the study area was unpolluted and not enriched, respectively. The relationship between the heavy metals concentration and the organic matter, and the clay particle wns proposed try using the multiple regression equations. © 2015 Thai Society of Higher Eduation Institutes on Environment

Subongkot T.,Burapha UniversityChonburi | Ngawhirunpat T.,Silpakorn UniversityNakhon Pathom
International Journal of Nanomedicine | Year: 2015

The purpose of this study was to investigate the effect of ultradeformable liposome components, Tween 20 and terpenes, on vesicle fluidity. The fluidity was evaluated by electron spin resonance spectroscopy using 5-doxyl stearic acid and 16-doxyl stearic acid as spin labels for phospholipid bilayer fluidity at the C5 atom of the acyl chain near the polar head group (hydrophilic region) and the C16 atom of the acyl chain (lipophilic region), respectively. The electron spin resonance study revealed that Tween 20 increased the fluidity at the C5 atom of the acyl chain, whereas terpenes increased the fluidity at the C16 atom of the acyl chain of the phospholipid bilayer. The increase in liposomal fluidity resulted in the increased skin penetration of sodium fluorescein. Confocal laser scanning microscopy showed that ultradeformable liposomes with terpenes increase the skin penetration of sodium fluorescein by enhancing hair follicle penetration. © 2015 Subongkot and Ngawhirunpat.

Yasarawan N.,Burapha UniversityChonburi | Thipyapong K.,Burapha UniversityChonburi | Ruangpornvisuti V.,Chulalongkorn University
Journal of Molecular Structure | Year: 2016

Alanylaspartic dipeptide (AlaAsp) and zinc(II)-flavonol complex could represent a metal-binding site in proteins and a metal-ion releasing agent, respectively. Chelation of zinc(II) by either AlaAsp or flavonol ligands in aqueous solution has been examined using DFT methods with polarizable continuum model (PCM/DFT). Coordination geometry, complexation stoichiometry, coordination bond strength, preferable metal-binding site on ligands and effect of water coordination on the stability of complexes have been addressed. In several cases, the long-range corrected density functional CAM-B3LYP allows the most accurate prediction of both structural and spectroscopic data. The preferential transfer of flavonol-chelated zinc(II) to AlaAsp under solvation is attainable through the ligand-exchange reaction. The energy barrier of such reaction is significantly dependent on the degree of hydrogen bonding within the transition state. In summary, either hydroxylation or methoxylation at particular positions on the 3-hydroxyflavone backbone significantly affects the reactivity of flavonol chelates in the metal-ion transfer. © 2015 Elsevier B.V.

Chindaprasirt P.,Khon Kaen University | Rattanasak U.,Burapha UniversityChonburi
Construction and Building Materials | Year: 2016

Cement pipes have been used to transfer the domestic sewage and industrial wastewater due to its cost effectiveness. However, they faced the acid attack problem owing mainly to the high content of calcium compounds in the composite. Coating of cement pipes is one of the methods to protect the cement pipe surface from acid attack. An alumino-silicate geopolymer provides excellent mechanical properties and resistance to severe environments. Therefore, this research proposed the covering of cement-based materials with geopolymer. The covered specimens were immersed in deionized water (pH = 6.1), 0.005% H2SO4 (pH = 3), 5% MgSO4 (pH = 7.7) and 3% H2SO4 (pH = 0.3, representing the worst condition in the wastewater system). The pH and Ca2+ content of immersion solutions were measured. In addition, mechanical and chemical properties of geopolymeric-covering material were tested after the immersion in solutions for 30 and 90 days. © 2016 Elsevier Ltd. All rights reserved.

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