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Preparation and characterization of ceramic materials with low thermal conductivity and high strength using high-calcium fly ash

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International Journal of Minerals,Metallurgy and Materials 2022年第8期29卷 1635-1645页

作者： Mana Rodchom Panida Wimuktiwan Kanit Soongprasit Duangduen Atong supawan Vichaphund Ceramics and Construction Materials Research Group National Metal and Materials Technology Center(MTEC)National Science and Technology Development Agency(NSTDA)Khlong NuengKhlong LuangPathumthani 12120Thailand

High calcium-fly ash(HCFA)collected from the Mae Moh electricity generating plant in Thailand was utilized as a raw material for ceramic *** main compositions of HCFA characterized by X-ray fluorescence mainly consisted of 28.55wt%SiO_(2),16.06wt%Al_(2)O_(3),23.40wt%CaO,and 17.03wt%Fe_(2)O_(3).Due to high proportion of calcareous and ferruginous contents,HCFA was used for replacing the potash feldspar in amounts of 10wt%-40wt%.The influence of substituting high-calcium fly ash(0-40wt%)and sintering temperatures(1000-1200℃)on physical,mechanical,and thermal properties of ceramic-based materials was *** results showed that the in-corporation of HCFA in appropriate amounts could enhance the densification and the strength as well as reduce the thermal conductivity of ceramic *** proportion of calcareous and ferruginous constituents in fly ash promoted the vitrification behavior of ceramic *** a result,the densification was enhanced by liquid phase formation at optimum fly ash content and sintering *** addition,these components also facilitated a more abundant mullite formation and consequently improved flexural strength of the ceramic *** op-timum ceramic properties were achieved with adding fly ash content between 10wt%-30wt%sintered at 1150-1200℃.At 1200℃,the max-imum flexural strength of ceramic-FA samples with adding fly ash 10wt%-30wt%(PSW-FA(10)-(30))was obtained in the range of 92.25-94.71 MPa when the water absorption reached almost zero(0.03%).In terms of thermal insulation materials,the increase in fly ash addi-tion had a positively effect on the thermal conductivity,due to the higher levels of porosity created by gas evolving from the inorganic decom-position reactions inside the ceramic-FA *** addition of 20wt%-40wt%high-calcium fly ash in ceramic samples sintered at 1150℃reduced the thermal conductivity to 14.78%-49.25%,while maintaining acceptable flexural strength values(~45.67-87.62 MPa).

关键词： ceramic materials high-calcium fly ash strength thermal conductivity

Fabrication of Ni-alumina Composite Membrane via Powder and Bulk Impregnation Method for Hydrogen Separation

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Journal of Materials Science & Technology 2010年第7期26卷 589-596页

作者： supawan Vichaphund Duangduen Atong National Metal and Materials Technology Center

This work reports two preparation methods of Ni-Al2O3 composite to be used as a hydrogen separation membrane. The first method was powder impregnation while the second method was soaking-drying-firing or bulk impregnation. In the first method, the 10 wt pct Nickel （11） nitrate hexahydrate solution was mixed with Al2O3 powder. The mixed powders were dried at 100℃ and uniaxially pressed into a disk shape at 7 MPa. The densification of composite membranes was accomplished by pressureless sintered at 900-1300℃. For the second preparation method, the Al2O3 disk support was prepared firstly by uniaxially pressing Al2O3 powder at 7 MPa and then sintered at 1000-1200℃ for 2 h. After that, the Al2O3 support was soaked into 10 wt pct Ni solution, dried at 100℃ and calcined at 900℃ for 2 h. The soaking-drying-firing sequence was repeated ten times to finally obtain the Ni-Al2O3 membranes. from these two methods were reduced at 910℃ for 2 h After preparation process, the membranes fabricated in hydrogen atmosphere. The effect of the preparation method on properties of membranes in terms of density, porosity, phase and microstructure are discussed

关键词： Composite membrane Hydrogen separation Nickel Alumina

Protective effects of rice bran hydrolysates on heart rate variability,cardiac oxidative stress,and cardiac remodeling in high fat and high fructose diet-fed rats

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Asian Pacific Journal of Tropical Biomedicine 2021年第5期11卷 183-193页

作者： Ketmanee Senaphan Upa Kukongviriyapan Pisit Suwannachot Geerasak Thiratanaboon Weerapon Sangartit supawan Thawornchinsombut Akkasit Jongjareonrak Division of Physiology Faculty of Veterinary MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Cardiovascular Research Group Khon Kaen UniversityKhon Kaen 40002Thailand Department of Physiology Faculty of MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Department of Food Technology Faculty of TechnologyKhon Kaen UniversityKhon Kaen 40002Thailand Faculty of Agro-Industry Chiang Mai UniversityChiang Mai 50100Thailand

Objective:To examine the ameliorative effect of rice bran hydrolysates(RBH)on metabolic disorders,cardiac oxidative stress,heart rate variability(HRV),and cardiac structural changes in high fat and high fructose(HFHF)-fed ***:Male Sprague-Dawley rats were daily fed either standard chow diet with tap water or an HFHF diet with 10%fructose in drinking water over 16 ***(500 and 1000 mg/kg/day)was orally administered to the HFHF-diet-fed rats during the last 6 weeks of the study *** the end of the treatment,metabolic parameters,oxidative stress,HRV,and cardiac structural changes were ***:RBH administration significantly ameliorated metabolic disorders by improving lipid profiles,insulin sensitivity,and hemodynamic ***,RBH restored HRV,as evidenced by decreasing the ratio of low-frequency to highfrequency power of HRV,a marker of autonomic *** oxidative stress was also mitigated after RBH supplementation by decreasing cardiac malondialdehyde and protein carbonyl,upregulating eNOS expression,and increasing catalase activity in the ***,RBH mitigated cardiac structural changes by reducing cardiac hypertrophy and myocardial fibrosis in HFHFdiet-fed ***:The present findings suggest that consumption of RBH may exert cardioprotective effects against autonomic imbalances,cardiac oxidative stress,and structural changes in metabolic syndrome.

关键词： Rice bran hydrolysates Heart rate variability Cardiac remodeling Metabolic syndrome Oxidative stress

The RAMA Ped Card： Does it work for actual weight estimation in child patients at the emergency department

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World Journal of Emergency Medicine 2017年第2期8卷 126-130页

作者： Thavinee Trainarongsakul Pitsucha Sanguanwit supawan Rojcharoenchai Kittisak Sawanyawisuth Yuwares Sittichanbuncha Department of Emergency Medicine Faculty of Medicine Ramathibodi Hospital Mahidol University Bangkok Thailand Department of Medicine Faculty of Medicine Khon Kaen University Khon Kaen Thailand Research Center in Back Neck Other Joint Pain and Human Performance (BNOJPH) Khon Kaen University Khon Kaen Thailand Ambulatory Medicine Research Group Faculty of Medicine Khon Kean University Khon Kaen Thailand

BACKGROUND: In emergency conditions, the actual weight of infants and young children are essential for treatments. The RAMATHIBODI Pediatric Emergency Drug Card or RAMA Ped Card has also been developed to estimate actual weight of the subjects. This study aimed to validate the RAMA Ped Card in correctly identifying the actual weight of infants and young ***: This study was a prospective study. We enrolled all consecutive patients under 15 years of age who visited the emergency department(ED). All eligible patients' actual weight and height were measured at the screening point of the ED. The weight of each patient was also measured using the unlabeled RAMA Ped Card. The Cohen's kappa values and agreement percentages were ***: During the study period, there were 345 eligible patients. The RAMA Ped Card had a 61.16% agreement with the actual weight with a kappa of 0.54(P<0.01), while the agreement with the actual height had a kappa of 0.90 and 91.59% agreement. Sub-group analysis found kappa scores with good range in two categories: in cases of accidents and in the infant group(kappa of 0.68 and 0.65, respectively).CONCLUSION: The RAMA Ped Card had a fair correlation with the actual weight in child patients presenting at the ED. Weight estimation in infant patients and children who presented with accidents were more accurate.

关键词： Child Weight estimation Card Kappa

Rice bran hydrolysates induce immunomodulatory effects by suppression of chemotaxis, and modulation of cytokine release and cell-mediated cytotoxicity

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Asian Pacific Journal of Tropical Biomedicine 2020年第10期10卷 470-478页

作者： Suphanthip Phusrisom Laddawan Senggunprai Auemduan Prawan Sarinya Kongpetch Upa Kukongviriyapan supawan Thawornchinsombut Ronnachai Changsri Veerapol Kukongviriyapan Department of Pharmacology Faculty of MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Department of Physiology Faculty of MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Department of Food Technology Faculty of TechnologyKhon Kaen UniversityKhon Kaen 40002Thailand Chumphae Rice Research Center Ministry of Agriculture and CooperativesKhon Kaen 40130Thailand

Objective: To evaluate the immunomodulatory effects of rice bran hydrolysates on cultured immune cells and their underlying ***: Rice bran hydrolysates were prepared from pigmented rice(Oryza sativa L.) by hydrothermolysis and protease digestion. Rice bran hydrolysates were assayed for phenolic content and antioxidant activity. Cell proliferation of Jurkat, THP-1 and peripheral blood mononuclear cells(PBMC) was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Chemotaxis was evaluated by transwell chamber methods. Immunoadherence of THP-1 was performed on cultured human umbilical vein endothelial cells(HUVEC). Cytokine released from PBMC was measured by ELISA assay kits. Lymphocyte-mediated cytotoxicity was carried out on KKU-452 cells. Proteins associated with immunomodulation were analyzed by Western immunoblotting assay. Results: Rice bran hydrolysates were rich in phenolic compounds, such as ferulic acid, catechin, quercetin, and quercetin glycosides. Rice bran hydrolysates suppressed phytohemagglutinin(PHA)-stimulated proliferation of PBMC and Jurkat cells, chemotaxis of Jurkat and THP-1 cells, and immunoadherence of THP-1 on HUVEC cultured cells. The cellular mechanism of rice bran hydrolysates involved the activation of AMPK as well as suppression of m TOR, NF-κB and VCAM-1. Rice bran hydrolysates potentiated PBMC on the PHA-stimulated release of IL-2, TNF-α, and IL-4, and enhanced PHA-induced non-MHC-restricted cytotoxicity on KKU-452 cancer cells. Conclusions: The immunomodulatory effect of phytochemicals derived from rice bran hydrolysates suggests its therapeutic potential for further investigation.

关键词： cytotoxicity immuno lysates

Anti-tumor activity of rice bran hydrolysates on migration, invasion and angiogenesis

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Asian Pacific Journal of Tropical Biomedicine 2021年第7期11卷 317-326页

作者： Suphanthip Phusrisom Laddawan Senggunprai Auemduan Prawan Sarinya Kongpetch Upa Kukongviriyapan supawan Thawornchinsombut Sirithon Siriamornpun Theeraphan Chumroenphat Ronnachai Changsri Veerapol Kukongviriyapan Department of Pharmacology Faculty of MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Department of Physiology Faculty of MedicineKhon Kaen UniversityKhon Kaen 40002Thailand Department of Food Technology Faculty of TechnologyKhon Kaen UniversityKhon Kaen 40002Thailand Department of Food Technology and Nutrition Faculty of TechnologyMahasarakham UniversityMahasarakham44150Thailand Chumphae Rice Research Center Ministry of Agriculture and CooperativesKhon Kaen 40130Thailand

Objective:To investigate anti-tumor effect of rice bran hydrolysates(RBH)on proliferation,migration,invasion,and angiogenesis of cholangiocarcinoma(CCA)cells,and elucidate the underlying ***:RBH was prepared from Tubtim Chumprae rice(Oryza sativa L.)by hydrothermolysis followed by protease *** content in RBH was analyzed by high-performance liquid *** CCA cells,KKU-156,KKU-452,and KKU-100,were used to study the effects of RBH on proliferation,migration,invasion,and adhesion by wound healing,Transwell chamber,and fibronectin cell adhesion *** was evaluated using human umbilical vein endothelial *** associated with cancer progression were analyzed by immunobloting ***:RBH contained carbohydrates,proteins,lipids,and various phenolic compounds and *** did not inhibit CCA proliferation,but strongly suppressed migration,invasion,adhesion of CCA cells,and the formation of tube-like capillary structures of human umbilical vein endothelial ***,RBH downregulated phosphorylation of FAK,PI3K,and Akt,suppressed NF-κB nuclear translocation,decreased the expression of ICAM-1,vimentin and vascular endothelium growth factor(VEGF),and increased the expression of ***:RBH suppresses CCA cell migration and invasion and decreases expression of proteins involved in cancer *** is a potential food supplement for cancer prevention.

关键词： Rice bran hydrolysates Ferulic acid CCA cells Proliferation Migration Invasion Adhesion Metastasis Angiogenesis NF-κB

Extraction of Palladium from Acidic Chloride Media into Emulsion Liquid Membranes using LIX 984N-C<sup>®</sup>

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International Journal of Nonferrous Metallurgy 2012年第2期1卷 13-22页

作者： Satit Praipruke Korbratna Kriausakul supawan Tantayanon Green Chemistry Research Laboratory Department of Chemistry Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok Thailand National Center of Excellence for Petroleum Petrochemicals and Advanced Materials (NCE-PPAM) Bangkok Thailand Thailand Program of Petrochemistry Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok Thailand

The extraction of palladium from hydrochloric acid solutions into emulsion liquid membranes (ELMs) using LIX 984N-C as the extractant was investigated. The influential factors and the total capacities of palladium extraction were determined by a batch method. The behavior of palladium extraction by ELMs under the operational conditions-pH of the external feed phase, surfactant and extractant concentration, internal stripping phase concentration, treat ratio and agitation speed were reported. Using LIX 984N-C, palladium was effectively extracted from the external acidic chloride feed phase into the internal receiving phase of W/O emulsions. More than 92% of palladium could be extracted at a feed pH of 2 with 3% Span 80, 9% LIX 984N-C and 7M HCl at a stirring speed of 300 rpm.

关键词： Palladium Extraction LIX 984N-C Emulsion Liquid Membrane

Small-lab Kit for Organic Chemistry

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Small-lab Kit for Organic Chemistry

The Strategy to Encourage the Bed Ridden Paraplegic Patient to Keep Fit at Home with the Development of Exercise Machine

13th Asian Chemical Congress

作者： supawan Tantayanon Zuriati Zakaria Department of Chemistry Faculty of ScienceChulalongkorn UniversityThailand Department of Chemistry Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaMalaysia

＜正＞September 15,2009 Venue:The 13th Asian Chemical Congress,Shanghai,China The experiments in this part will demonstrate more practical and safer organic laboratory using Small-Lab Kit,designed and tested by chemists in Thailand,which promotes the reduction of exposure by reducing the amounts of chemicals and solvents in each ***,the design of the

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Journal of Sports Science 2016年第6期4卷 361-373页

作者： Seekaow Churproong Pornsiri Jongkol Komsun Pasayadej supawan Chadsarin Pattra Wattanapan PatanitWatakit Department of Family and Community Medicine Institute of Medicine Suranaree University of Technology NakhonRatchasima30000 Thailand Department of Industrial Engineering Institute of Engineering Suranaree University of Technology NakhonRatchasima 30000Thailand The Center for Scientific and Technological Equipment Suranaree University of Technology NakhonRatchasima 30000 Thailand Department of Rehabilitation and Physiotherapy Suranaree University of Technology Hospital Suranaree University ofTechnology NakhonRatchasima 30000 Thailand Department of Rehabilitation Medicine Institute of Medicine Suranaree University of Technology NakhonRatchasima 30000Thailand Department Health Promotion Suranaree University of Technology Hospital Suranaree University of TechnologyNakhonRatchasima 30000 Thailand