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Mangosteen peel extract exhibits cellular antioxidant activity by induction of catalase and heme oxygenase‐1 mRNA expression 下载免费PDF全文
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Weerasak Somkhunthot Watcharin Detkunthong Areerat Dawongsa Kitsana Lamsombat Chartchai Bunyattrakoon Sasima Kongmongkol 《Integrated ferroelectrics》2015,165(1):31-44
Thermoelectric minerals have been found at Loei Province, in the northeastern part of Thailand. Local mineral specimens were prepared in the powders and bulk solids form by crushing, calcination and annealing, pressure and sintering, cutting and polishing. Mineral samples were used to analyze the composition and phase, determine the thermoelectric property and efficiency, design and construct a thermoelectric generator. Chemical composition and phase identification of powder samples were analyzed by the x-ray fluorescence (XRF) and x-ray diffraction (XRD), respectively. XRF and XRD results indicated that the mineral samples comprised the SO3-CaO-SiO2-others, Fe2O3-SO3-SiO2-others, Fe2O3-SiO2-others and Fe2O3-SiO2-CuO-others. From the thermoelectric property and efficiency determinations, the p-SO3-CaO-SiO2-others, p-Fe2O3-SO3-SiO2-others, n-Fe2O3-SiO2-others and n-Fe2O3-SiO2-CuO-others bulks were found to exhibit the thermoelectric figure of merit in orders of 10?14, 10?11, 10?14 and 10?13 K?1, respectively. A fabricated thermoelectric generator made from ten pairs of p-Fe2O3-SO3-SiO2-others and n-Fe2O3-SiO2-CuO-others legs that can be provided the open circuit voltage and short circuit current up to 48.30 mV and 0.14 μA for a temperature difference of 39.80 K at room temperature, respectively. While the internal resistance decreased and reached a value of 665 kΩ. 相似文献
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