This paper presents a study on the strength and porosity of mortars made with binary blends of ordinary Portland cement type I (OPC) sand and ground rice husk ash (RHA) or ground palm oil fuel ash (POA). The mortar mixtures were made with Portland cement Type I containing 0-40% RHA and POA. The water to binder ratio was kept constant at 0.5 and the flow of mortar was maintained at 110 +/- 5% with the aid of superplasticizer (SP). X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used on materials. Compressive strength and porosity of the mortar were determined. The XRD pattern confirmed that POA and RHA were mainly amorphous silica. The use of RHA and POA produced waste ash with relatively high strength. The porosity of mortar containing RHA and POA decreased with the low replacement level of up to 20% of pozzolanic but increased with the 40% replacement level. RHA and POA have a high potential to be used as a good pozzolanic material in concrete work.

The purpose of this research is to study the level of knowledge and understanding in democracy of the youths in Bangkok according to gender age education level family incomes occupation of the parents interesting level in political news and the participation in political activity. This research is a survey research. The sample groups are the 2500 youths who live in Bangkok metropolis persons from 50 districts by accidental sampling. Questionnaire is used as a tool in data collection. The statistics are means of percentage frequency arithmetic means standard deviation and Chi-square. The results are as the following: most of The have knowledge and understanding level in democracy at a moderate level. The factors affecting the knowledge and understanding which a statistical significance at .05 are age education level family incomes occupation of parents interesting level in political and participation in political activity.

The objective of this survey research was to study the opinion of people in Samutsakhon Municipality Samutsakhon province concerning the construction of on-ground pipe-water production system. The results of this survey research were as follows : the opinion and requirement of people in Samutsakhon concerning the construction of on-ground pipe-water production system were at high level. The perception of problems concerning the construction of pipe-water production system was not relative to the opinion of people in However the perception of information in constructing pipe-water production system and the participatory responsibilities in service of pipe-water production system were positively and significantly relative to the opinion of people at the level of .05

Degumming process is a fundamental process for silk yarn and silk fabric finishing. The main objective is scouring the substrate such as silk gum (sericin) wax and fatty acid from silk fiber. The principle of degumming process is breaking the peptide linkage of amino acid in sericin structure into a small molecule which is soluble in water. The hydrolysis reaction is performed by acid and alkaline but they have a big problem on the surface area of silk. Proteolytic enzyme is used to solve this problem but it has some disvantages such as using a specific condition and high price. For this reason papain enzyme form dry latex of Carica papaya Linn. is choren to degum the raw silk. Papain is an enzyme which has a good protein digestion. The efficiency of degumming process was evaluated by determination of tensile strength and staining test with direct dyes (C.I. Direct Red 80). The result revealed that the appropriate conditions for silk degumming with dry Carica papaya Linn.๛s latex should be recommended as follows: the amount of dry latex solution of 4% owf at 75 ฐC for 30 minutes at neutral condition (pH ≈7). The degummed fibers had lustrous soft and smooth surface. The fiber strength and surface were not damaged on this process.

The aim of this research was to study the status in using information technology in education of level 3-4 teachers in schools of the Office of Bangkok Education region 3 academic year 2004. The sample were 362 teachers. The instrument used in this research was the questionnaire. The data were analyzed by Percentage frequency means standard Deviation and analysis of variance. The results of this research were as the following: the status in using Information technology in education in all seven dimensions: CAI distance learning internet education network classroom laboratory and software application of teachers was at the medium level.