随着移动设备的普及和多平台浏览的需求不断增长,开发具有良好响应性的用户界面变得至关重要。基于此,探讨基于现代Web技术的响应式用户界面设计与实现。首先,使用超文本标记语言(Hyper Text Markup Language,HTML)、层叠样式表(Cascadi...随着移动设备的普及和多平台浏览的需求不断增长,开发具有良好响应性的用户界面变得至关重要。基于此,探讨基于现代Web技术的响应式用户界面设计与实现。首先,使用超文本标记语言(Hyper Text Markup Language,HTML)、层叠样式表(Cascading Style Sheets,CSS)和JavaScript等前端技术,以及相关的框架和工具,创建适应不同屏幕尺寸和设备的用户界面。其次,通过数据表格分析来优化用户界面,以提供更好的用户体验。最后,讨论一些实际案例,展示响应式用户界面设计的最佳实践和应用。展开更多
[Objective] Ginger essential oil (GEO) is widely used in food production and medical field in recent years due to its prominent biological functions, and this study was conducted to obtain high-quality and high-puri...[Objective] Ginger essential oil (GEO) is widely used in food production and medical field in recent years due to its prominent biological functions, and this study was conducted to obtain high-quality and high-purity ginger essential oil from the fresh ginger. [Method] GEO was extracted from ginger roots by supercritical fluid extraction (SFE) method. The effects of flow rate of CO2, mesh size of ginger powder and volume of entrainer were investigated by single-factor experiments and response surface method. The content and extraction rate of 6-gingerol represented the extraction index of GEO. [Result] The conditions were optimized as follows: flow rate of CO2 at 25 L/h, mesh size of ginger power of 80 mesh, and volume of anhydrous ethanol as entrainer of 92.46 ml. The optimal extraction rate of 6-gingerol was 3.21%, which was predicted by RSM. [Conclusion] The optimal process of supercritical carbon dioxide extraction of ginger essential oil was identified by singlefactor experiments and response surface method. The present study provides a satisfactory method for purifying GEO from ginger for industrial purpose.展开更多
基金Supported by the Natural Science Foundation of Higher Education Institutions of Jiangsu Province(16KJA550001)~~
文摘[Objective] Ginger essential oil (GEO) is widely used in food production and medical field in recent years due to its prominent biological functions, and this study was conducted to obtain high-quality and high-purity ginger essential oil from the fresh ginger. [Method] GEO was extracted from ginger roots by supercritical fluid extraction (SFE) method. The effects of flow rate of CO2, mesh size of ginger powder and volume of entrainer were investigated by single-factor experiments and response surface method. The content and extraction rate of 6-gingerol represented the extraction index of GEO. [Result] The conditions were optimized as follows: flow rate of CO2 at 25 L/h, mesh size of ginger power of 80 mesh, and volume of anhydrous ethanol as entrainer of 92.46 ml. The optimal extraction rate of 6-gingerol was 3.21%, which was predicted by RSM. [Conclusion] The optimal process of supercritical carbon dioxide extraction of ginger essential oil was identified by singlefactor experiments and response surface method. The present study provides a satisfactory method for purifying GEO from ginger for industrial purpose.
基金National Basic Research Program(No.2007CB808000)National Natural Science Foundation of China(No.50573042)+1 种基金NSFC-DFG TRR61Tsinghua University Initiative Scientific Research Program(No.2009THZ02230)