In this study pH physical and microbiological qualities of clear and opaque plastic bottled drinking water produced in Buriram Province Thailand were investigated. Samples of bottled drinking water (N=22) were 8 clear plastic bottles and 14 opaque plastic bottles. Results showed that pH value of all samples were in a range of 6.04 ± 0.03 to 7.61 ± 0.01 in which 7 samples were not acceptable according to the criteria for drinking water in sealed containers declared by the Ministry of Public Health of Thailand. Coliform bacteria in all tested samples were less than 1.8 MPN/100mL and none of E. coli was detected. Therefore consumers of bottled drinking water produced from Buriram province should be aware of health safety because some drinking water products were unacceptable in terms of pH value.

Purpose of this study 1) factors affecting the drop out of Rajamangala University of Technology PhraNakhon students in 2014 academic year. 2) correlation with personal information and 3) solutions to prevent the drop out. A study population are 1179 students who have dropped out in 2014 academic year and 584 lecturers of the Rajamangala University of Technology PhraNakhon. The analysis on the students population will be carried out by computing frequency percentage and Chi-square test to observe independency between the two variables. Also conducting an interview on the 360 students and 70 lecturers of the Rajamangala University of Technology PhraNakhon. From data collecting found that majority of student population status can be put by order as terminated deprived and resigned. Gender hometown occupation of parents/guardians and income of parents/guardians show significant relation to the drop out of the students in 2014 academic year while parents marriage status show no relation with statistically significant of 0.05. From the interview it can be extracted and put in order of contribution that personal issue family issue university environment and lecturer effect the student decision to drop out. Suggested solution: the university should create unique image encourage students to have part-time job during semester set up a consulting and support center provide more financial aid adjust and improve university scenery sourcing/maintenance furniture and equipments to meet usage adequate and quality standard and finally set up a colloquiums focusing a practical application. Therefore Rajamangala University of Technology Phra Nakhon should put the result from this study into practical use as a guideline to meet future circumstance and to develop administrative strategy for maximum advantage in the competition.

The study was aimed to investigate environmental conservation conscience and related knowledge of Business Administration undergraduates at Rajamangala University of Technology Phra Nakhon. It was also intended to examine the relationship between the environmental conservation knowledge and the students’ environmental conservation conscience. The samples were 208 fourth year students studying in the second semester of at the Faculty of Business Administration in 2013. The data were collected through the questionnaire regarding the environmental conservation conscience and related knowledge and were analyzed by the frequency distribution percentage distribution standard deviation t-test and One – Way ANOVA. In case of 0.05 statistical differences was found Scheffe’s method was applied for adjusting significance levels in a linear regression analysis to account for multiple comparisons as well as Pearson Product Moment Correlation statistically significant at 0.05 level. The result showed that Business Administration undergraduates highly displayed their environmental conservation conscience and related knowledge and moderately related (r = 0.407) and statistically significant at level of 0.05.

The purposes of this research are to study: 1) understanding of water and electricity saving 2) water and electricity consumption behavior 3) to compare water and electricity consumption behavior classified by personal characteristics of the students Faculty of Home Economics Technology Rajamangala University of Technology Phra Nakhon. This research was descriptive research. The sample group was specified to be 325 people by stratified sampling. The reliability of this questionnaire is 0.87. Statistics used was descriptive and inferential statistics. The research result revealed that: 1) The overall of understanding and knowledge regarding electricity saving of the students is in the moderate level. 2) The overall of water and electricity consumption behavior of the students is in the moderate level. 3) The comparison of behavior of water and electricity consumption specified according to personal characteristics could be summarized that the students in different genders classes and majors had identical water consumption behavior and the students in different genders and classes had identical electricity consumption behavior. On the other hand the students having different majors had statistically different electricity consumption behavior at 0.05.

The effects of plant growth regulators alone or in combination on Hexachlorocyclohexane (HCH) phytotoxicity were studied. Waxy corn seeds were immersed in different plant growth regulators that are 1) 2 mg/l Indolebutyric acid (IBA) 2) 2 mg/l Thidiazuron (TDZ) 3) 2 mg/l Gibberellic acid (GA3) 4) 1 mg/l IBA + 1 mg/l TDZ 5) 1 mg/l TDZ + 1 mg/l GA3 and 6) 1 mg/l IBA + 1 mg/l GA3 then sawn in 30 mg/kg HCH-contaminated soil or non-contaminated soil for 10 days. All plant growth regulators could enhance shoot and root dried weight of waxy corn seedlings in non-contaminated soil. Only 2 mg/l GA3 could enhance root length of waxy corn seedlings in non-contaminated soil. In HCH-contaminated soil only 2 mg/l TDZ could increase shoot dried weight of waxy corn seedlings. Also 2 mg/l IBA or 1 mg/l IBA and1 mg/l GA3 could increase root fresh weight of waxy corn seedlings. The exposure with HCH in soil did not affect to shoot and root tissue even though the growth of shoot and root were inhibited. However the exposure with HCH and receive exogenous plant growth regulator induced aerenchyma formation in cortex and pith of waxy corn root.