This study was aimed at evaluating the physicochemical properties and oxidation stability of castor oil using microwave-assisted solvent extraction(MAE). MAE was performed using 5% ethanol in hexane as solvent at diff...This study was aimed at evaluating the physicochemical properties and oxidation stability of castor oil using microwave-assisted solvent extraction(MAE). MAE was performed using 5% ethanol in hexane as solvent at different extraction times, power intensities and solvent-to-feed(S/F, ml of solvent to gram of feed) ratios.The process parameters were optimized by statistical approach using historical data design of response surface method(RSM). The oils were characterized for yield, physicochemical properties, dielectric properties and oxidation stability, and comparison was also made with oil extracted using Soxhlet method. Results show that the maximum oil yield of 37% was obtained at 20 min with microwave power intensity of 330 W and S/F ratio of 20. The main fatty acid composition of castor oil is ricinoleic acid. The density, refractive index, dielectric properties and oxidation stability of oils are not affected by the extraction methods and extraction parameters of MAE. However, the MAE-extracted oil is more viscous compared to that by Soxhlet method. With extra caution on oil oxidation, MAE could be a promising solvent extraction method with an 86% less in processing time and a higher yield.展开更多
为建立蓖麻种子蛋白质双向电泳优化体系,本研究以‘2129’品系蓖麻种子为试验材料,采用2-DE技术的方法,对其进行研究。结果表明:酚提取法比TCA/丙酮沉淀法更适宜提取蓖麻种子的总蛋白质;24 cm pH 3-10NL的干胶条比pH 4~7的干胶条更适宜...为建立蓖麻种子蛋白质双向电泳优化体系,本研究以‘2129’品系蓖麻种子为试验材料,采用2-DE技术的方法,对其进行研究。结果表明:酚提取法比TCA/丙酮沉淀法更适宜提取蓖麻种子的总蛋白质;24 cm pH 3-10NL的干胶条比pH 4~7的干胶条更适宜应用在蓖麻种子的2-DE电泳中;对蛋白质样品进行除杂比不除杂得到的蛋白质图谱更加清晰,且横条纹和纵条纹都有所减少;蛋白质上样量为800μg时获得的蛋白质图谱最佳。本研究将为蓖麻种子蛋白质组学的研究提供基础数据和技术支持。展开更多
基金Supported by Universiti Teknologi Malaysia through 415 Flagship(Grant No.03G70)
文摘This study was aimed at evaluating the physicochemical properties and oxidation stability of castor oil using microwave-assisted solvent extraction(MAE). MAE was performed using 5% ethanol in hexane as solvent at different extraction times, power intensities and solvent-to-feed(S/F, ml of solvent to gram of feed) ratios.The process parameters were optimized by statistical approach using historical data design of response surface method(RSM). The oils were characterized for yield, physicochemical properties, dielectric properties and oxidation stability, and comparison was also made with oil extracted using Soxhlet method. Results show that the maximum oil yield of 37% was obtained at 20 min with microwave power intensity of 330 W and S/F ratio of 20. The main fatty acid composition of castor oil is ricinoleic acid. The density, refractive index, dielectric properties and oxidation stability of oils are not affected by the extraction methods and extraction parameters of MAE. However, the MAE-extracted oil is more viscous compared to that by Soxhlet method. With extra caution on oil oxidation, MAE could be a promising solvent extraction method with an 86% less in processing time and a higher yield.
文摘为建立蓖麻种子蛋白质双向电泳优化体系,本研究以‘2129’品系蓖麻种子为试验材料,采用2-DE技术的方法,对其进行研究。结果表明:酚提取法比TCA/丙酮沉淀法更适宜提取蓖麻种子的总蛋白质;24 cm pH 3-10NL的干胶条比pH 4~7的干胶条更适宜应用在蓖麻种子的2-DE电泳中;对蛋白质样品进行除杂比不除杂得到的蛋白质图谱更加清晰,且横条纹和纵条纹都有所减少;蛋白质上样量为800μg时获得的蛋白质图谱最佳。本研究将为蓖麻种子蛋白质组学的研究提供基础数据和技术支持。
