จำนวน Repository ( 52 )

การประดิษฐ์เซรามิกเฟร์โรอิเล็กทริกไร้ตะกั่วในระบบบิสมัทโซเดียมโพแทสเซียมไททาเนตเป็นองค์ประกอบหลัก
การประดิษฐ์เซรามิกเฟร์โรอิเล็กทริกไร้ตะกั่วในระบบบิสมัทโซเดียมโพแทสเซียมไททาเนตเป็นองค์ประกอบหลัก

The research project investigated the effects of CoO additive on dielectric ferroelectric physical and mechanical properties of modified Bi0.5(Na0.81K0.19)0.5TiO3 ceramics were investigated. The samples were synthesized by solid state reaction technique where powders were calcined at 850 °C for 4 h and ceramics were sintered at 1050 °C for 4 h which difference heating rate controlled i.e. 100 300 and 600 °C/h for. The ceramics of BNKT/x wt.% CoO was added CoO by various x=0.00 0.10 0.20 0.30 0.60 and 0.90. Phase formation was determined by X-ray diffraction technique (XRD). The X-ray diffraction analysis of the ceramics suggests that all samples exhibited a perovskite structure. The dielectric properties under room temperature and various temperatures were also determined. Dielectric measurement data showed that the additive and heating rate controlled influenced dielectric constant and dielectric loss. Furthermore the hysteresis loop behaviors slightly changed with increasing the CoO contents.

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ศาสตร์พระราชากับการพัฒนาสถานศึกษาระดับอุดมศึกษา
ศาสตร์พระราชากับการพัฒนาสถานศึกษาระดับอุดมศึกษา

The article “King’s wisdom for the development in higher education Institution” aims to follow in the footsteps of the King Bhumipol Aduyadej Rama 9 and to be grateful for the mother land the application the King’s wisdom to be framework for the development in higher education plan in accordance with the 15 years long-term plan N๐. 2 (BE 2551-2565) and the National Economic and Social Development Plan N๐. 12 (BE 2560-2564) which adheres to the guideline “philosophy of sufficiency economy.” The results of the analysis of the King’s wisdom in accordance with the framework of the Higher Education Development Plan and the National Economic and Social development Plan for the development of four main missions: men working goals and organization. Summary King’s wisdom is a science of development that can be develop in every area perfectly in science technology research and innovation by focusing on people as the center with developing people to have knowledge skill social responsibility with ethics and morality to be a perfect person in order to be ready to live in a modern world and world trend which being aware of moderation reasoning and having good self-immunity and not abandoning the cultivation of morality as well as being able to live happily and living together in peace.

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การพัฒนาผลิตภัณฑ์เปลือกกล้วยน้ำว้าแช่อิ่มอบแห้ง
การพัฒนาผลิตภัณฑ์เปลือกกล้วยน้ำว้าแช่อิ่มอบแห้ง

This research aimed to investigate the suitable method to product osmotically dehydrated banana peels and determine its shelf life as well as consumer acceptation. It was found that the proper method was the slow osmotic dehydration process with 30 40 and 50% of syrup (sucrose solution). This method led to the highest appearance color and flavor scores as accessed by the consumer. Therefore the slow osmotic dehydration process was selected for further study relating to the ratio between salt and malic acid (3:2 3:3 and 2:3 of syrup weight). The result show that no differences in appearance color flavor and texture scores were found among treatments however the sample treated with salt and malic acid in the ratio of 3:3 obtained the highest taste score. Thus the suitable process to produce the osmotically dehydrated banana peels was slow process with salt and malic in the ratio 3:3. According to the shelf life study the sample (100g) packed in metallic foil still compiled with Thai community standard of fruit and vegetable products during 12 weeks of storage under 25-30 °C. In addition the consumers also accepted the selected osmotically banana peel product.

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แผ่นมุงหลังคาจากวัสดุรีไซเคิล
แผ่นมุงหลังคาจากวัสดุรีไซเคิล

The purpose of this project is to study the mechanical and physical properties of recycled roofing materials. The pulp extracted from the UHT beverage boxes to get aluminum foil mixed with low density polyethylene. This can be used engineering and is an option to reduce the amount of UHT boxes left over to roofing sheets. In experiment 3 aluminum foil medium size and fine then hot and extruded with 68 and 10 bar compression then cut into test pieces. To test mechanical and physical properties in accordance with the test standards: Torsion Testing Tensile strength Impact resistance Heat resistance water absorption and density testing. Compare the mechanical and physical properties of the material; different sizes of aluminum foil and compressive strength. To bring the best materials to the product. From the tests it was found that the properties of recycled composite materials From the box UHT beetroot This is made of coarse aluminum foil. 18.23 MPa bending strength 10.66 MPa tensile strength 110.987 J / m2 impact resistance 52.40 Shore-D Hardness 0.62 % Water Absorption 0.70 % Thickness Swelling 1.086 g/m3 Density 0.031 m2.K/W Thermal Resistance and 0.291 W/mK Thermal Conductivity is the best mechanical properties. Due to the large aluminum foil it can be used for high strength. Which is higher than the aluminum foil of a smaller size.

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Biogasification from rice straw
Biogasification from rice straw

The research is to present the biogas production from rice straws with anaerobic digester. Firstly three digester tanks contain dry rice straw 3 kg slice with length 1-2 inch and water 60 lite. Digester A was a control sample. Digester B was designed for minimum performance (add the morass 2 lite) while the digester C was designed for Carbon/Nitrogen control (add urea 1 kg.). The biogas was operated for 30 days and measured which highest percent of Lower Explosive Limit was 93%. This studied show the simple methods to producing the biogas from the rice straw.

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