以姜黄素为芯材,高粱醇溶蛋白为壁材,采用反溶剂法制备包埋姜黄素的高粱醇溶蛋白复合颗粒(简称复合颗粒),并对其理化性质及稳定性进行研究。结果表明:姜黄素与高粱醇溶蛋白制备复合颗粒的最佳芯壁比(质量比)为1∶10,产品平均粒径为13.17...以姜黄素为芯材,高粱醇溶蛋白为壁材,采用反溶剂法制备包埋姜黄素的高粱醇溶蛋白复合颗粒(简称复合颗粒),并对其理化性质及稳定性进行研究。结果表明:姜黄素与高粱醇溶蛋白制备复合颗粒的最佳芯壁比(质量比)为1∶10,产品平均粒径为13.17μm,电位为19.38 m V,得率为87.51%,包封率为62.61%,负载率为6.51%。相比于高粱醇溶蛋白颗粒,扫描电子显微镜显示:复合颗粒呈球形,但表面有多孔结构;红外光谱结果显示:复合颗粒位于1 534、1 655 cm^(-1)等处的波峰均发生红移,α-螺旋含量减少,β-折叠含量增加。24 h紫外光照射后,高粱醇溶蛋白包埋的姜黄素光稳定性提高33%。复合颗粒的粒径和多分散性系数在30 d室内环境贮藏过程中均无明显变化,但在环境p H 5~6,颗粒易聚集。结果表明:高粱醇溶蛋白的包埋作用有益于提高姜黄素的稳定性,可为姜黄素和高粱醇溶蛋白的高值化利用提供理论依据。展开更多
A field study was conducted for two years at the Arid Zone Research Institute, Dera Ismail Khan, Pakistan, to determine the optimum level of nitrogen and efficient application method in the production of sorghum （Sor...A field study was conducted for two years at the Arid Zone Research Institute, Dera Ismail Khan, Pakistan, to determine the optimum level of nitrogen and efficient application method in the production of sorghum （Sorghum bicolor L.）. Using four levels of nitrogen, i.e., 0, 60, 90, and 120 kg ha^-1, and two different application methods （soil application and foliar spray）, the experiment was laid out in a split-plot design, where the main plots were used to determine the effective method of application and the subplots were used to detect the influence of N levels on the grain yield. The average data obtained after two years of study indicated an increase in the grain yields with an increase in N levels irrespective of the method used of N application. The grain yield increased from 2.92 to 5.61 t ha^-1 in the plots that were treated with 90 kg N ha^-1 compared with the control plots. Quadratic regression analysis showed that the increase in the yield was higher at the lower levels of N compared with the succeeding higher levels. The soil application method, producing an average grain yield of 4.79 t ha^-1, was found to be superior to the foliar spray method with an average grain yield of 4.56 t ha^-1. The protein content of the grain showed a linear increase with N application, attaining the maximum at 120 kg N ha^-1 in both the methods of N application. In addition, compared with the method of soil application, higher crude protein contents were observed using the method of foliar spray at all N levels.展开更多
文摘以姜黄素为芯材,高粱醇溶蛋白为壁材,采用反溶剂法制备包埋姜黄素的高粱醇溶蛋白复合颗粒(简称复合颗粒),并对其理化性质及稳定性进行研究。结果表明:姜黄素与高粱醇溶蛋白制备复合颗粒的最佳芯壁比(质量比)为1∶10,产品平均粒径为13.17μm,电位为19.38 m V,得率为87.51%,包封率为62.61%,负载率为6.51%。相比于高粱醇溶蛋白颗粒,扫描电子显微镜显示:复合颗粒呈球形,但表面有多孔结构;红外光谱结果显示:复合颗粒位于1 534、1 655 cm^(-1)等处的波峰均发生红移,α-螺旋含量减少,β-折叠含量增加。24 h紫外光照射后,高粱醇溶蛋白包埋的姜黄素光稳定性提高33%。复合颗粒的粒径和多分散性系数在30 d室内环境贮藏过程中均无明显变化,但在环境p H 5~6,颗粒易聚集。结果表明:高粱醇溶蛋白的包埋作用有益于提高姜黄素的稳定性,可为姜黄素和高粱醇溶蛋白的高值化利用提供理论依据。
文摘A field study was conducted for two years at the Arid Zone Research Institute, Dera Ismail Khan, Pakistan, to determine the optimum level of nitrogen and efficient application method in the production of sorghum （Sorghum bicolor L.）. Using four levels of nitrogen, i.e., 0, 60, 90, and 120 kg ha^-1, and two different application methods （soil application and foliar spray）, the experiment was laid out in a split-plot design, where the main plots were used to determine the effective method of application and the subplots were used to detect the influence of N levels on the grain yield. The average data obtained after two years of study indicated an increase in the grain yields with an increase in N levels irrespective of the method used of N application. The grain yield increased from 2.92 to 5.61 t ha^-1 in the plots that were treated with 90 kg N ha^-1 compared with the control plots. Quadratic regression analysis showed that the increase in the yield was higher at the lower levels of N compared with the succeeding higher levels. The soil application method, producing an average grain yield of 4.79 t ha^-1, was found to be superior to the foliar spray method with an average grain yield of 4.56 t ha^-1. The protein content of the grain showed a linear increase with N application, attaining the maximum at 120 kg N ha^-1 in both the methods of N application. In addition, compared with the method of soil application, higher crude protein contents were observed using the method of foliar spray at all N levels.
