Thailand Institute of Scientific and Technological Research is a scientific research institute of Thailand's Ministry of Science and Technology. Its headquarters is in Techno Thani, Pathum Thani province. Wikipedia.
Kulchan R.,Thailand Institute of Scientific and Technological Research |
Boonsupthip W.,Kasetsart University |
Suppakul P.,Kasetsart University
Journal of Food Engineering | Year: 2010
Moisture sorption kinetics and isotherms of cassava-flour-based baked product were investigated. Empirical models were tested to fit the experimental data. Textural changes of the product were investigated. In addition, activation energies (Ep) for water vapor permeability (WVP) of polyolefin films were determined. Finally, the product was packaged in low-density polyethylene (LDPE) or oriented polypropylene (OPP) pouches, and stored at 30 ± 1 °C and 50 ± 2% RH to simulate actual storage conditions and to determine shelf life. This actual shelf life was compared to the predicted shelf life by using empirical models and Ep for WVP. Moisture sorption kinetics was more rapid during the initial stage, while a lesser amount of moisture was adsorbed as adsorption time increased. The higher the relative humidity used, the more pronounced the effect. The sigmoidal moisture sorption isotherms of this product can be classified as type II. The GAB model was found to be the best-fit model for this product. Once the product hardness or work reached the maximum and began to reduce at moisture content (MC) ≈6%, the product texture began to be detected as becoming slightly soft. This implies that hardness and work at the maximum level could be used to identify the critical MC which causes a loss of crispness to an unacceptable degree. The predicted shelf lives - estimated by employing Ep for WVP of LDPE and OPP, and the GAB model - were close to the actual shelf lives. Therefore, the estimation by empirical models and activation energy was found to be applicable for rapid and accurate shelf life prediction. © 2010 Elsevier Ltd. All rights reserved.
Ketsa S.,Kasetsart University |
Ketsa S.,Academy of Science |
Wisutiamonkul A.,Thailand Institute of Scientific and Technological Research |
van Doorn W.G.,University of California at Davis
Postharvest Biology and Technology | Year: 2013
Fruit of cv. Gros Michel banana were treated with 1-MCP (1000nLL-1 for 4h at 25°C) and then packed in non-perforated polyethylene (PE) bags for modified atmosphere storage (MAP). The bags were placed in corrugated cardboard boxes and stored at 14°C. Fruit were removed from cool storage and ripened at room temperature using ethephon. The length of storage life was determined by the change in peel color to yellow, after this ethephon treatment. Fruit treated with 1-MCP+MAP had a storage life of 100 days. The storage life of control fruit (no 1-MCP and no MAP) was 20 days. Fruit held in PE bags without 1-MCP treatment had a 40 day storage life, and the same was found in fruit treated with 1-MCP but without PE bags. 1-MCP is an inhibitor of ethylene action, but also inhibited ethylene production, mainly through inhibition of ACC oxidase activity in the peel. MAP inhibited ethylene production mainly through inhibition of ACC oxidase, both in the peel and pulp. The combination of 1-MCP treatment and MAP storage resulted in much lower ethylene production due to inhibition of both ACC synthase and ACC oxidase activity. © 2013 Elsevier B.V.
Boonsawang P.,Prince of Songkla University |
Subkaree Y.,Thailand Institute of Scientific and Technological Research |
Srinorakutara T.,Thailand Institute of Scientific and Technological Research
Biomass and Bioenergy | Year: 2012
Palm pressed fiber (PPF) is a lignocellulosic material that has potential to be cheap substrate for ethanol production. In this study, the enzymatic hydrolysis of alkali pretreated PPF was investigated. It was found that the hydrolysis with cellulase (10 FPU g -1 of PPF) and β-glucosidase (10 U g -1 of PPF) gave the higher reducing sugar production than using cellulase alone. In addition, the optimum condition of simultaneous saccharification and fermentation (SSF) with 6 h of prehydrolysis for ethanol production was the PPF concentration of 100 kg m -3 with the enzyme loading of cellulase 6.0 FPU g -1 of PPF and β-glucosidase 3.0 U g -1 of PPF at pH of 5.0 and 35 °C. The ethanol concentration of 10.4 kg m -3 and ethanol yield of 192 g kg -1 of cellulose was obtained at the optimum condition in 24 h of SSF. Finally, the effect of prehydrolysis of pretreated PPF prior to SSF on the ethanol concentration was examined with batch and fed-batch mode of hydrolysis. It was found that prehydrolysis with the fed-batch mode did not improve ethanol yield. However, the fed-batch mode of prehydrolysis gave the highest ethanol production of 12.1 kg m -3 at 12 h of SSF process. Also, it was concluded that the advantages of fed-batch of prehydrolysis prior SSF were the less enzyme requirement and the increasing PPF loading for ethanol production. © 2012 Elsevier Ltd.
Sutthiwong N.,Thailand Institute of Scientific and Technological Research |
Sutthiwong N.,University of Reunion Island |
Dufosse L.,University of Reunion Island
FEMS Microbiology Letters | Year: 2014
Arthrobacter arilaitensis is one of the major microorganisms responsible for the coloration of cheese surface, particularly in smear-ripened cheeses. This study investigated the occurrence of pigment synthesis among A. arilaitensis strains in several aspects covering (1) UV-Vis absorption spectra and HPLC chromatograms of pigment extracts, (2) diversity of pigment production among strains, (3) influence of light on the production of pigment, and (4) kinetic of pigment synthesis. Based on absorption spectra and HPLC analysis, the 14 A. arilaitensis strains studied could be divided into two groups depending on their ability to produce carotenoids, carotenoid-producing, and nonpigmented strains. The methanolic extracts prepared from eight carotenoid-producing strains contained at least four carotenoids represented mainly as polar molecules. The diversity of pigment concentrations among these strains was low, with carotenoids ranging from 0.40 to 0.76 mg L-1 culture and specific productivities from 0.14 to 0.25 mg pigment per g dry biomass, under light condition. When cultivating these A. arilaitensis strains under darkness condition, carotenoid biosynthesis was lower within a 0.17-0.25 mg L-1 range. The pigment production time curve of a representative colored A. arilaitensis strain displayed a sigmoid shape which paralleled cell growth, probably indicating a growth-associated pigmentation. Surface bacteria contribute to the overall color of smear-ripened cheeses and to consumer's purchasing decision. Yellow carotenoids production is described for the new player Arthrobacter arilaitensis depending on strains, culture media, light exposure, and growth kinetics. © 2014 Federation of European Microbiological Societies. Published by John Wiley & Sons Ltd. All rights reserved.
Thammasat E.,Thailand Institute of Scientific and Technological Research
BMEiCON 2013 - 6th Biomedical Engineering International Conference | Year: 2013
This study was conducted to statistically recognize the walking, jogging, and running activities by using accelerometers build-in a smartphone. Using the smartphone causes the user need not to carry another device more. The advantage of the study is to observe remotely any movement of an interested person at all time so the observer can manage appropriate program for exercise, monitor energy consumption, or evaluate calorie compensation. The method used for the recognition applied the statistical analysis: descriptive statistics, analysis of variance, F-test, and t-test. © 2013 IEEE.
Chen S.-Y.,Japan National Institute of Advanced Industrial Science and Technology |
Lao-ubol S.,Thailand Institute of Scientific and Technological Research |
Mochizuki T.,Japan National Institute of Advanced Industrial Science and Technology |
Abe Y.,Japan National Institute of Advanced Industrial Science and Technology |
And 2 more authors.
Bioresource Technology | Year: 2014
Sulfonic acid-functionalized platelet SBA-15 mesoporous silica with an acid capacity of 2.44mmol H+ g-cat-1 (shortly termed 15SA-SBA-15-p) was one-pot synthesized by co-condensation method. When applied as solid acid catalyst in synthesis of Jatropha biodiesel fuel (BDF), the 15SA-SBA-15-p catalyst showed higher activity and resistances to water and free fatty acid (FFA) than commercial sulfonic resins of Amberlyst-15 and SAC-13. For the continuous Jatropha BDF production, a steady 75-78wt% of fatty acid methyl ester (FAME) content was obtained over 15SA-SBA-15-p catalyst at 150°C for 75h, whereas the Amberlyst-15 and SAC-13 catalysts were quickly deactivated due to the decomposition of thermally unstable framework and serious leaching of sulfonic acids. More importantly, the quality, stability and cold flow characteristic of Jatropha BDF synthesized by 15SA-SBA-15-p catalyst were better than those synthesized by Amberlyst-15 and SAC-13 catalysts, making the blending with petro-diesel an easy task. © 2014 Elsevier Ltd.
Zhou L.,University of Hong Kong |
Su Y.C.F.,University of Hong Kong |
Chalermglin P.,Thailand Institute of Scientific and Technological Research |
Saunders R.M.K.,University of Hong Kong
Botanical Journal of the Linnean Society | Year: 2010
An extended molecular phylogenetic analysis of . Uvaria (Annonaceae) is presented, using maximum parsimony, maximum likelihood and Bayesian methods, based on sequences of four plastid DNA regions (matK, psbA-trnH spacer, rbcL and trnL-F). The additional taxa include the monotypic West African genus Balonga, the monotypic South-East Asian genus Dasoclema and seven Australian representatives of the genus Melodorum. The results indicate that all of these taxa are nested within a well-supported clade otherwise consisting of Uvaria species, indicating that their taxonomic treatment needs to be reassessed. The distinguishing morphological characteristics of the taxa are re-evaluated and interpreted as specialized adaptations of the basic Uvaria structure. The genus Uvaria is accordingly extended following the transfer of these species, necessitating six new nomenclatural combinations and two replacement names. © 2010 The Linnean Society of London.
Dufosse L.,University of Reunion Island |
Fouillaud M.,University of Reunion Island |
Caro Y.,University of Reunion Island |
Mapari S.A.S.,Biotechnology and Nutrition Unit |
And 2 more authors.
Current Opinion in Biotechnology | Year: 2014
With globalization in the research trends, healthier life styles, and the growing market for the natural food colorants in the economically fast-growing countries all over the world, filamentous fungi are being investigated as readily available sources of chemically diverse colorants. With two selected examples, polyketide-. Monascus-like pigments from the new fungal production strains, and the promising and yet unexplored hydroxy-anthraquinoid colorants, the present review highlights exciting recent findings, which may pave the way for alternative and/or additional biotechnological processes for the industrial production of natural food colorants of improved functionality. As an additional aspect, marine fungi are discussed as potential sources of novel pigments of numerous color hues and atypical chemical structures. © 2013 Elsevier Ltd.
Photjanataree P.,Thailand Institute of Scientific and Technological Research |
Liu Z.,Xi'an University of Science and Technology |
Jones F.R.,University of Sheffield
Macromolecular Materials and Engineering | Year: 2012
A model composite is used to simulate the interphase between an allylamine/1,7-octadiene plasma copolymer-coated fiber and an epoxy resin. Time-of-flight secondary-ion mass spectrometry (ToF-SIMS) is used to identify the structure of the interacting polymers and the locus of failure. The crack propagates near to one of the glass surfaces where a bonded semi- interpenetrating network forms. The effect of functionality of the plasma copolymer coating (or size) and its thickness on interfacial stress transfer efficiency (STE) at a fiber-break is studied using the fragmentation test. The cumulative stress transfer function and associated STE is able to differentiate between the improvement with increasing amine group concentration and decreasing thickness of the plasma polymer. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Pinitsoontorn S.,Khon Kaen University |
Lerssongkram N.,Khon Kaen University |
Keawprak N.,Thailand Institute of Scientific and Technological Research |
Amornkitbamrung V.,Khon Kaen University
Journal of Materials Science: Materials in Electronics | Year: 2012
The thermoelectric properties of the Ca 3Co 4 O9δd and the transition metals-doped Ca 3Co 3.8M 0.2O9δd (where M = Cr, Fe, Ni, Cu and Zn) ceramics were reported. Ca 3Co 4O9δd single phase was checked by using X-ray diffraction analysis performed for the Ca 3Co 3.8- M 0.2O9δd samples. The scanning electron micrographs showed some degrees of grains alignment in the compacted direction. The resistivity of the samples measured from 100 up to 700 °C varies in magnitude for different transition metals substitution. The variation of resistivity was explained by a change of carrier concentration induced by the doped ions. The thermopower increased with increasing temperature but showed no obvious change for any transition metals doping. The thermal conductivities changed for the doped samples but were relatively independent of temperature. The ZT was calculated to be the highest for the Fe substitution for the whole measurement temperature with the maximum value of 0.12 at 700 °C. © 2011 Springer Science+Business Media, LLC.