The development and research of titanium cast alloy and its casting technology, especially its application in aeronautical industry in China are presented. The technology of molding, melting and casting of titanium al...The development and research of titanium cast alloy and its casting technology, especially its application in aeronautical industry in China are presented. The technology of molding, melting and casting of titanium alloy, casting quality control are introduced. The existing problems and development trend in titanium alloy casting technology are also discussed.展开更多
Carbon quantum dots(CQDs)are fluorescent carbon nanomaterials that have been applied to biology,medicine,and optoelectronics,owing to their significant advantages such as simple synthesis methods,low cost,and widely a...Carbon quantum dots(CQDs)are fluorescent carbon nanomaterials that have been applied to biology,medicine,and optoelectronics,owing to their significant advantages such as simple synthesis methods,low cost,and widely available sources of raw synthesis materials.This review summarizes CQD preparation methods,which include hydrothermal and microwave-assisted synthesis methods,as well as separation methods such as centrifugation,dialysis,and filtration.Additionally,we review the application of CQDs in the detection of active ingredients,primarily phenolic compounds,in traditional Chinese medicine.We also discuss the quenching mechanism of CQD fluorescence using the active ingredients of traditional Chinese medicine.Limitations such as insufficient test selectivity,weak fluorescence intensity,and an unclear quantitative relationship between preparation methods and properties should be resolved for the efficient use of CQDs to detect active ingredients in Chinese medicine.展开更多
基金The paper is support by Foundation Key Project of Yunnan:The Study on inoculated theory and reliability of low carbonductile iron, NO. 1999E0004Z
文摘The development and research of titanium cast alloy and its casting technology, especially its application in aeronautical industry in China are presented. The technology of molding, melting and casting of titanium alloy, casting quality control are introduced. The existing problems and development trend in titanium alloy casting technology are also discussed.
基金supported by the National S&T Major Project of China(2018ZX09201011-003)the National Project for Standardization of Chinese Materia Medica(ZYBZH-C-GD-04).
文摘Carbon quantum dots(CQDs)are fluorescent carbon nanomaterials that have been applied to biology,medicine,and optoelectronics,owing to their significant advantages such as simple synthesis methods,low cost,and widely available sources of raw synthesis materials.This review summarizes CQD preparation methods,which include hydrothermal and microwave-assisted synthesis methods,as well as separation methods such as centrifugation,dialysis,and filtration.Additionally,we review the application of CQDs in the detection of active ingredients,primarily phenolic compounds,in traditional Chinese medicine.We also discuss the quenching mechanism of CQD fluorescence using the active ingredients of traditional Chinese medicine.Limitations such as insufficient test selectivity,weak fluorescence intensity,and an unclear quantitative relationship between preparation methods and properties should be resolved for the efficient use of CQDs to detect active ingredients in Chinese medicine.