In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fas...In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fast charging standards made by enterprises have troubled consumers.To this end,展开更多
[Objectives]To establish the quality standard for Euonymi Grandiflorus Caulis and Folium.[Methods]Qualitative identification was performed by methods of origin identification,microscopic identification and thin layer ...[Objectives]To establish the quality standard for Euonymi Grandiflorus Caulis and Folium.[Methods]Qualitative identification was performed by methods of origin identification,microscopic identification and thin layer chromatography(TLC);the moisture,total ash,acid-insoluble ash,and extract were detected using the method in the Chinese Pharmacopoeia(2020 Edition),and the contents of quercetin and kaempferol were determined by High Performance Liquid Chromatography(HPLC).[Results]The leaves of Euonymi Grandiflorus were subleathery,narrow and long elliptic or narrow obovate with cyme,and capsules were often with narrow wing ridge.Characteristics of microscopic identification were significant.Calcium oxalate cluster crystals,cubic crystals,inlaid parenchyma cells,starch granules,stomata,and fiber bundles could be observed.A TLC method for identification of Euonymi Grandiflorus Caulis and Folium was established.The contents of water,total ash,acid-insoluble ash were not higher than 13%,9%,12%,respectively;the extract were no less were not higher than 13%,9%,12%and 17%in ten batches of samples,respectively;the sum of quercetin and kaempferol were no less than 0.20%.[Conclusions]The quality standard of Euonymi Grandiflorus Caulis and Folium were established through the research.This method is accurate,specific,and reproducible and can be used for the quality control of Euonymi Grandiflorus Caulis and Folium.展开更多
At present many CAD software products did not fully meet the requirements of National Standard 《Technical drafting and Mechanical Drawing》 that greatly affects the quality and speed of engineering design. Taking com...At present many CAD software products did not fully meet the requirements of National Standard 《Technical drafting and Mechanical Drawing》 that greatly affects the quality and speed of engineering design. Taking computer-aided design of typical mechanical parts as an example, this paper proposes an approach to develop corresponding functions in CAD software to enhance the standardization of engineering design.展开更多
文摘In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fast charging standards made by enterprises have troubled consumers.To this end,
基金Supported by National Key Research and Development Program of China(2018YFC1708005)Sichuan Key Research and Development Program(2021YFS0043)+1 种基金Leading Talent Support Program of National Civil Commission(2021)Fundamental Research Funds for the Central Universities(ZYN2022067)。
文摘[Objectives]To establish the quality standard for Euonymi Grandiflorus Caulis and Folium.[Methods]Qualitative identification was performed by methods of origin identification,microscopic identification and thin layer chromatography(TLC);the moisture,total ash,acid-insoluble ash,and extract were detected using the method in the Chinese Pharmacopoeia(2020 Edition),and the contents of quercetin and kaempferol were determined by High Performance Liquid Chromatography(HPLC).[Results]The leaves of Euonymi Grandiflorus were subleathery,narrow and long elliptic or narrow obovate with cyme,and capsules were often with narrow wing ridge.Characteristics of microscopic identification were significant.Calcium oxalate cluster crystals,cubic crystals,inlaid parenchyma cells,starch granules,stomata,and fiber bundles could be observed.A TLC method for identification of Euonymi Grandiflorus Caulis and Folium was established.The contents of water,total ash,acid-insoluble ash were not higher than 13%,9%,12%,respectively;the extract were no less were not higher than 13%,9%,12%and 17%in ten batches of samples,respectively;the sum of quercetin and kaempferol were no less than 0.20%.[Conclusions]The quality standard of Euonymi Grandiflorus Caulis and Folium were established through the research.This method is accurate,specific,and reproducible and can be used for the quality control of Euonymi Grandiflorus Caulis and Folium.
文摘At present many CAD software products did not fully meet the requirements of National Standard 《Technical drafting and Mechanical Drawing》 that greatly affects the quality and speed of engineering design. Taking computer-aided design of typical mechanical parts as an example, this paper proposes an approach to develop corresponding functions in CAD software to enhance the standardization of engineering design.
