This research is aimed to study both the species diversity and utilization of plants at the Baan Tah Tongdeang community forest Nabot Wangchao districtTak province. The survey of plant species and the available quantity has been carried out using the quadrat method. The leaders and intellectuals in the community were interviewed using a structured questionnaire. The result showed that the plant with the highest Density (D) and Relative Density (RD) were Tectona grandis L.f. (0.734375/m2 7.742998353) Xylia xylocarpa Taub. var. kerrii Nielsen (0.6875/m2 7.248764415) Grewia eriocarpa (0.65625/m2 6.919275124) respectively. Whilst plant with the highest Frequency (F) and Relative Frequency (RF) were Xylia xylocarpa Taub. var. kerrii Nielsen Grewia eriocarpa and Holoptelea integrifolia Planch. (87.5 4.96) Tectona grandis L.f. and Schleichera oleosa (Lour.) Oken (75 4.26) Pterocarpus macrocarpus Kurz and Bombax anceps Pierre (62.5 3.55) respectively. The Shannon and Wiener’s diversity index (H’) of trees was 3.38 while evenness index was 0.85. The utilization of the plants in the community included 94 species as wood (used as plank furniture firewood charcoal string chemical extraction etc. 62 species as medicinal herbs 47 species as wild vegetables fruits and foods. All of them are utilized in the community. The results of this research would be beneficial for administrative and management as a guideline to preparation a community biological database and learning resources for conservation and sustainable uses of natural resources and environments in Baan Tah Tongdeang community forest.

This thesis aims to develop Allooyseem pattern and to study customers’ satisfaction in the developed Allooyseem Silk product. Samples in this study were Wat Bankradonmaidang Silk Weaver group in Krasung district Buriram province and 320 teachers in Muang district Burirum province who wore silk clothes at least once a week. Fifteen patterns of textiles were designed and selected by 5 experts to get 5 best patterns. The 5 patterns were woven as sample textile and surveyed for satisfaction. Data were analyzed for percentage mean and standard deviation Results of the study showed that customers were satisfied with pattern and color of the developed Allooyseem silk fabric. Pattern number 4 got high satisfaction level and there were suggestions to extend the research for sustainable development of Allooyseem silk in all aspects.

Dust is a major problem to effect of health especially in formal sector that is not covered by health benefits. This study was proposed at investigating the total dust and particulate matter (PM10) of workers in Thumley Teptaro Wood Handicraft industry Trang Province. Survey and sampling of dust from all operators were collected three replications using a tracking ID on working period. The results showed that were two groups of Thumley Teptaro Wood Handicraft industry that total dust were 7.7540+1.3110 and 14.4162+0.9265 mg/m3 and PM10 were 8.6134+1.4806 and 4.5279+0.8743 mg/m3 respectively. Total dust and PM10 were significant difference (P<0.05). PM10 in the wood product process of Thumley Teptaro Wood Handicraft industry were 3.3422+0.6685 2.9630+0.3050 and 4.5279+0.8743 mg/m3 in sawing frog style and polishing respectively. This result indicated that total dust and PM10 in all production process of Thumley Teptaro Wood Handicraft were not exceed the standard of Occupational Safety and Heath Administrstion and the notification of Interior Ministry about safety environment in workplace. Working behavior was found that workers were affected by total dust and PM10 in wood production process. All workers used dust protector during operators work.

This paper presents a quadrature sinusoidal oscillator providing sinusoidal signal which differs in phase. The features of the proposed circuit can be electronically controlled. The proposed circuit consists of 4 operational transconductance amplifiers(OTAs) and 2 grounded capacitors which is able to control the oscillation frequency(OF) and condition of oscillation(CO). To confirm the performance and theory of proposed circuit is verified by PSPICE simulations and the experimental results can be achieved by using the commercial parts(LM13700s). The power consumption is about 33.3mW at supply voltages

The aim of this research was to studied on the optimization of adding the extracted anthocyanin from black non-glutinous rice bran for prolonging shelf-life of Chinese sausage. The study was done by adding the anthocyanin extracts of 2 and 3 % with the combination of sodium nitrite 0 and 1 % during the processing of Chinese sausage. The sensory attributes evaluated using a nine-point hedonic scale and by using ranking test. The physicochemical analysis of storage study was conducted for 4 weeks. All analysis were carried out in every weeks. The results showed that Chinese sausage with added anthocyanin extracts of 3 % with the combination of sodium chloride 2 % gave the lowest value of moisture content with significantly difference (p<0.05). Chinese sausage with added sodium nitrite 1 % with the combination of the anthocyanin extracts of 3 % gave the highest score of overall acceptability. The product can retard oxidation with the value of TBA lower than the control sample with significantly difference (p<0.05)