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 หัวเรื่อง:การแยกน้ำมันมะพร้าวจากน้ำกะทิ ผู้เขียน: ดร.สุคนธ์ชื่น ศรีงาม, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractCoconut milk is an emulsion of oil in water. The studied oil separation process was composed of cream separation, fat aggregation at low temperature and emulsion breakdown at high temperature. Increase in feed rate and cream outlet opening diameter resulted in higher percentage of cream fraction with lower oil content. Percentage of cream fraction was related to the oil content, therefore, it could be used as an indicator in adjusting of feed rate and cream outlet opening diameter to obtain cream fraction of specified oil content. The suitable temperature for fat aggregation was below 15?C, when oil in the cream fraction was sufficiently solidified. The suitable temperature for emulsion breakdown was 80?C. The oil yield was 98%. The separated coconut oil was clear, colourless, with pleasant natural aroma. Free fatty acid was less than 0.1% and fatty acid composition was similar to coconut oil from copra. It was considered as a high quality oil which can be consumed without refining. |
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ที่มา:การประชุมวิชาการ ครั้งที่ 47 มหาวิทยาลัยเกษตรศาสตร์หัวเรื่อง:การศึกษาและวิเคราะห์คุณลักษณะทางไฟฟ้าของวัสดุที่ใช้ทำเสาล่อฟ้า |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Yttria Stabilized Zirconia as a Candidate for High Energy Density Capacitor) ผู้เขียน:ดร.อรทัย จงประทีป, รองศาสตราจารย์ ,  Vladimir Petrovsky, Fatih Dogan สื่อสิ่งพิมพ์:pdf AbstractAs one of the main components in power converters, dielectric capacitors can play crucial roles in facilitating power conversion in various applications, such as hybrid-electric and fuel cell vehicles. Capacitor reliability is a key challenge for development of high performance capacitors. In this study, yttrium stabilized zirconia (YSZ) with various yttria concentrations were fabricated and tested for dielectric properties, such as breakdown strength and dielectric loss factors. The results indicated that the breakdown strength as high as 2 MV/cm could be achieved in YSZ samples with 10 mol% yttria. In addition, the dielectric loss factors of the samples were lower than 0.4%. Superior breakdown strength and relatively low loss demonstrated that YSZ ceramics have high reliability, showing a great potential as candidates for high energy density capacitors. |
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