จำนวน Repository ( 1574 )
Preparation of titanium dioxide supported on activated carbon
The purpose of this research work was to synthesize titanium dioxide supported on activated carbon and used it as a catalyst for dye decolorisation. The effect of preparing factors on titanium dioxide supported on activated carbon such as calcinations temperature and the amount of carbon supports were investigated at 300 400 and 500OC and in range of 5-30 percent by weight respectively. The X-ray diffraction (XRD) technique was used to detect the crystal structure of prepared catalysts. It was found that all peaks were anatase phase. The morphology of these catalysts was analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM) techniques. The results showed regularly distribution of titanium dioxide supported on activated carbon. The particle size of obtained catalysts was 5-10 nm. The Brunauer-Emmett-Teller (BET) technique was analyzed physical characteristic of catalysts. The specific surface area average pore diameter and pore volume of catalysts was 151.02-784.13 m2/g 26.94-64.35 and 0.24-0.55 cm3/g respectively. Furthermore the activity of obtained catalyst was carried out by using these catalysts to decolourise dye aqueous solution. The titanium dioxide supported on activated carbon 20 percent by weight can obtain 99.78% decolourisation at dye concentration 75 mg/L catalyst concentration 0.5 g/L within 90 minute. Comparison with titanium dioxide P25 (commercial grade) titanium dioxide supported on activated carbon has higher ability. This is because it was not only photocatalytic reaction but it was also absorption
Effect of binders on shrinkage cracking behavior of concrete
This research was aimed to study the effect of binders on cracking behavior of high strength concrete under restrained shrinkage condition. The cracking behaviors of concrete that study were cracking age in uniaxially restrained shrinkage test shrinkage rate free shrinkage crack propagation and strength of concrete. The binders used in this study were fly ash and limestone powder. The weight percentage of replacement of cement by fly ash and limestone powder were 30 and 10% respectively. The water to binder ratios was 0.35. The results indicated that the influence parameters of shrinkage cracking were type of binder amount of free shrinkage shrinkage rate and tensile creep of concrete. The use of fly ash and limestone powder could reduce free shrinkage and shrinkage rate of concrete and result in the longer cracking age than cement-only concrete. The tensile creep of cement-only concrete was higher than that of limestone powder concrete and fly ash concrete respectively
Packaging development for chiangmai organic agricultural coop’s organic brown rice
The objectives of this study were to : 1) explore problem conditions and needs of consumers for organic brown rice packaging of Chiangmai Organic Agriculture Cooperative Limited;2) investigate the packaging model of organic brown rice market competitions ; and 3) develop the organic brown rice packaging model of Chiangmai Organic Agriculture Cooperative Limited. The sample group in this study consisted of 385 organic brown rice consumers giving quantitative data and another 2 giving quantitative data. Findings showed that the following were problems encountered: 1) The brown rice rack was too thin; 2) wood borers were found growing in the brown rice racks; and 3) the label on the brown rice racks was too big. Regarding needs of the informants the following were found: 1) the weight of the rack of brown rice should be 1 kilogram; and 2) the packaging label should be attached in the vertical line of the rack. The statement “organic brown rice” was found to be most important information on the label. For organic brown rice of competitors it was packaged in a vacuum sack with pictures on a label. It weighs 1 kilogram. Developing an organic brown rice packaging model of Chiangmai Organic Agriculture Cooperative Limited to be consistent with needs of consumers and the cooperative.
The approach for sustainable development and growth community enterprise
The development method to sustainable and growth of community enterprises is a qualitative study. This aims to professional development model to community enterprise. This is done by collecting data by dept interview observation and analysis. By the result found that the government organization supported to subsidies capital and equipments but operating by private-owned enterprises. Problems concerning marketing weakness unable to expand the market. This weakness resulted in a slow pace of development of community enterprises and a high possibility of dissolution but are still operating in form of OTOP. Important characteristics of community enterprises that were able to expand business included strong leadership sacrificing being accepted among members continual progress and good governance should give emphasis to local market by making products which are accepted by local people and have community enterprise network.
The analysis of the relationship between securities price and the efficiency of the account receivable management, case study: the listed companies in the stock exchange of thailand, agricultural business group
The objectives of this research are to analyze the relationship between securities price and the efficiency of the account receivable management and to study the model of improving the efficiency of the account receivable management of the agricultural business group in the Stock Exchange of Thailand. The number of data which had been used in this research was 16 random companies of all 22 companies from the listed companies in the Stock Exchange of Thailand agricultural business group by using purposive sampling method. The researcher used both quantitative and descriptive analysis method by bringing the quantitative data analysis from 2006-2010 to descriptive analyzing which had compared between the selling revenue account receivable value allowance for doubtful bad debt account receivable turnover average collection period book value per share primary earnings per share and securities price. The results of analyzing are changing in the account receivable of Chiangmai Frozen Foods Pcl. Lee Pattana Pcl.; changing in the bad debt of Pak Food Pcl.; changing in the average collection period of Thai Rubber Latex Corporation (Thailand) Pcl. Pak Food Pcl.; changing in the book value per share of Pak Food Pcl. Kiang Huat Sea Gull Trading Frozen Food Asian Seafoods Pcl. Asian Seafoods Pcl.; changing in the primary earnings per share of Thai Rubber Latex Corporation (Thailand) Pcl. Thai Luxe Enterprise Pcl. Lee Pattana Pcl. and Kiang Huat Sea Gull Trading Frozen Food Asian Seafoods had related to securities price per share.