Activated carbon also called activated charcoal or activated coal is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions. In this research studies environmental impacts of activated carbon production processes which produced from two types of agricultural by-products namely : coconut shells and palm-oil shells . SimaPro software is applied to evaluate the environmental impacts of both processes. The results have shown that the environmental impacts for the process using coconut shells as raw material is higher than that using palm –oil shells as raw material.

Heavy metal is one of the major environmental pollutants. However the protective cellular mechanisms in response to heavy metal stress are not well-understood yet. Previously it has been found that the yeast deletion mutants lacking vacuolar H+-ATPase (V-ATPase) activity which functions in vacuolar acidification exhibited growth defects under cadmium stress conditions. In addition several genes involved in H+-ATPase have been recently found to be required for resistance to aluminum. To investigate the roles of vacuolar H+-ATPase plasma membrane H+-ATPase and mitochondrial H+-ATPase in tolerance to cadmium we examined the growth of yeast deletion mutants lacking different types of H+-ATPase in YPD media containing 80 μM of cadmium. Our results showed that a number of mutants lacking V-ATPase activity were sensitive to cadmium suggesting the important role of V-ATPase in cadmium detoxification. We next examined the growth of mutants lacking genes responsible for different vacuolar functions in order to investigate the functional activities of vacuoles involved in cadmium detoxification mechanism. We found that the mutants lacking vacuolar protein-sorting genes exhibited high sensitivity to cadmium as well suggesting the importance of protein transportation during cadmium stress.

The purpose of this study was to study individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon. The survey method by questionnaire was used to collect data from students in their 4th year who were in the 4-year program and 2-year continual program of the university 350 in total. The collected data was analyzed with a statistical software program to calculate the percentage means standard deviations t-test and One-way ANOVA. The level of statistical significance was set at .05. The result reveals that individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon were age faculty academic record previous education resident characteristic the relationship of student behaviour learning condition and satisfaction towards graduates production. Meanwhile factors of gender and study program didn’t affect individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon

The research involved the characterization of the properties of silver alloys -bearing copper and zinc. The alloys composed of 58.4% silver 20.85-41.76% copper and 0-20.83% zinc respectively. When comparing the characteristics of this alloy and sterling silver 925 the alloy specimen had mechanical properties better than the sterling silver 925. The alloy tests presenting the mechanical values of the hardness shear bond strength elasticity of the specimen were in a range of 54.6-95.3 HV1 209.5-379.3 MPa. 100.6-193.8 MPa. and 32.1-51.7% respectively. While the mechanical values of sterling silver 925 were 52.8 HV1 193.5MPa. 96.0 MPa. and 29.8% respectively. Besides these the microstructure of the alloy specimen showed the dendrite structure. We found that this structure decreased when the concentration copper in the specimen increased. After adding zinc into the alloys the high amount of zinc caused the zinc-rich (alpha) phase changed to Eutectic phase together with the significantly increased area of alpha phase. These effects therefore brought up the better various mechanical properties of the alloys. At the same time the another test specimen composed 58.67% Ag 39.20% Cu and 2.14% zinc. The color level of this specimen was close typically to the sterling silver 925 with the difference of Da at 0.236 and Db only at 5.268. Additionally the higher copper concentration in the alloy provided a value tentatively increased but b value decreased. However more remarkable results were that the zinc showed opposite effects from the copper.

The purposes of the research were to design and develop a computer assisted instruction package with tutorial through e-learning on computer technology curriculum and to find out efficiency effectiveness and learners’ satisfaction towards the package. The research tools are 1) the Computer Instruction Package on Database Management System Subject 2) Achievement evaluations 3) Quality assessment and evaluation form for multimedia software and 4) Questionnaire of learners’ satisfaction. The research results reveals that the efficiency of the Computer Instruction Package was at 82.50/82.56 corresponding with 80/80 criteria. The analysis of pre-test and post-test scores finds that the effectiveness after the process (Epost) was at 82.56 which was higher than one tested before the process (Epre) which was at 14.62. Therefore the Computer Instruction Package on Program Design and Development could increase the students learning effectiveness up to 67.94 corresponding with 60 criteria. The Mean of satisfaction of the sampling groups was rather at a high level (4.28). It could be concluded that the Computer Assisted Instruction Package with tutorial through e-learning on computer technology curriculum had the efficiency that could used for self study.