Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+rem...Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+removal rate of the MSSS reached above 95%. Compared with spent shiitake substrate (SSS), the specific surface area, electronegativity and surface functional groups of the MSSS were all improved, resulting in a high adsorption capacity. The Cu2+ adsorption of MSSS reached equilibrium after 0.75 h and was an exothermic reaction. The SEM and EDS analyses of the MSSS before and after Cu2+ adsorption showed that the pores on the surface of the MSSS were occupied after adsorption and the Cu content increased but the Na content decreased.展开更多
Research on selection of superior breeding infraspecies Gyrinops versteegii （Gilg） Domke aims to select an infraspecies of G. versteegii having internal factors that affect the quality and quantity of production aro...Research on selection of superior breeding infraspecies Gyrinops versteegii （Gilg） Domke aims to select an infraspecies of G. versteegii having internal factors that affect the quality and quantity of production aromatic resin or agarwood. The internal factors are variations in wood anatomy, phytochemicals and agarwood of infraspecies G. versteegii. Of five local populations taken from West Lombok Island in Indonesia, the research areas are geographically located at coordinates： 8°15′-8°40′ South Latitude and 116°00′-116°20′East Longitude. Quality and quantity of agarwood production is influenced by internal factors of eaglewood trees, such as high starch production and the size of the cells making up the larger wood tissue. Infraspecies G. versteegii that have quality and quantity production of aromatic resin （the best agarwood） is Beringin group and the highest quantity of agarwood production （agarwood formation on the whole organ） is Soyun group.展开更多
The development of HKCMM standards is one of the achievements of developing Hong Kong into an intemational centre for Chinese medicine. In order to enable more people concerned to have an intimate knowledge of this st...The development of HKCMM standards is one of the achievements of developing Hong Kong into an intemational centre for Chinese medicine. In order to enable more people concerned to have an intimate knowledge of this standard, the author was invited to introduce the development of HKCMM standards to readers, including： 1） the history of the project and the basis for legislative supports; 2） the composition and operation of the regulatory division, the research institution and the evaluation committee; 3） the progress of HKCMM standards; 4） the contents and features of HKCMM standards.展开更多
High density of phenyl rings makes PAF-1 have robust structure and highly lipophilic pore, which make it very suitable for organocatalysis. However, there is no report about using PAF-1 as platform for enantioselectiv...High density of phenyl rings makes PAF-1 have robust structure and highly lipophilic pore, which make it very suitable for organocatalysis. However, there is no report about using PAF-1 as platform for enantioselective organocatalysis.In this paper, using PAF-1 as the platform, a chiral prolinamide catalytic site was introduced onto the framework of PAF-1 via a series of stepwise post-synthetic modifications,obtaining a novel PAF-supported chiral catalyst named PAF-1-NHPro. Then its enantioselective catalytic performance was studied by subjecting it to catalyze the model Aldol reaction between p-nitrobenzaldehyde and cyclohexanone.PAF-1-NHPro showed good diastereoselectivity and enantioselectivity with excellent and easy recyclability.展开更多
High-efficiency photocatalysts are of great importance to satisfy the requirements of green chemistry nowadays.Here we reported a novel solar-driven photocatalyst fabricated by a facile surface modification method,wit...High-efficiency photocatalysts are of great importance to satisfy the requirements of green chemistry nowadays.Here we reported a novel solar-driven photocatalyst fabricated by a facile surface modification method,with the two-dimensional carboxylated zinc phthalocyanine-carboxylated C60-titanium dioxide(Zn Pc-C3-Ti O2)nanosheets,in which the surface modifications of Zn Pc and C60derivative were designed to extend the absorption range and promote charge separation,respectively.Benefiting from the unique structure and positive synergetic effect,the Zn Pc-C3-Ti O2 nanocomposite shows promising applications in selective reduction of nitroarenes for high-value-added aromatic amines under solar light.Especially,for the photocatalytic reduction of nitrobenzene to aniline,the Zn Pc-C3-Ti O2 nanocomposite possesses both high efficiency and selectivity(up to 99%).展开更多
基金Project(51204011)supported by the National Natural Science Foundation of ChinaProject(20121000803)supported by the Foundation of the Advisor of Beijing Excellent Doctoral Dissertation of ChinaProject(2013T60063)supported by the China Postdoctoral Science Foundation
文摘Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+removal rate of the MSSS reached above 95%. Compared with spent shiitake substrate (SSS), the specific surface area, electronegativity and surface functional groups of the MSSS were all improved, resulting in a high adsorption capacity. The Cu2+ adsorption of MSSS reached equilibrium after 0.75 h and was an exothermic reaction. The SEM and EDS analyses of the MSSS before and after Cu2+ adsorption showed that the pores on the surface of the MSSS were occupied after adsorption and the Cu content increased but the Na content decreased.
文摘Research on selection of superior breeding infraspecies Gyrinops versteegii （Gilg） Domke aims to select an infraspecies of G. versteegii having internal factors that affect the quality and quantity of production aromatic resin or agarwood. The internal factors are variations in wood anatomy, phytochemicals and agarwood of infraspecies G. versteegii. Of five local populations taken from West Lombok Island in Indonesia, the research areas are geographically located at coordinates： 8°15′-8°40′ South Latitude and 116°00′-116°20′East Longitude. Quality and quantity of agarwood production is influenced by internal factors of eaglewood trees, such as high starch production and the size of the cells making up the larger wood tissue. Infraspecies G. versteegii that have quality and quantity production of aromatic resin （the best agarwood） is Beringin group and the highest quantity of agarwood production （agarwood formation on the whole organ） is Soyun group.
文摘The development of HKCMM standards is one of the achievements of developing Hong Kong into an intemational centre for Chinese medicine. In order to enable more people concerned to have an intimate knowledge of this standard, the author was invited to introduce the development of HKCMM standards to readers, including： 1） the history of the project and the basis for legislative supports; 2） the composition and operation of the regulatory division, the research institution and the evaluation committee; 3） the progress of HKCMM standards; 4） the contents and features of HKCMM standards.
基金supported by National Basic Research Program of China (2014CB931804)the National Natural Science Foundation of China (21302061 and 21531003)
文摘High density of phenyl rings makes PAF-1 have robust structure and highly lipophilic pore, which make it very suitable for organocatalysis. However, there is no report about using PAF-1 as platform for enantioselective organocatalysis.In this paper, using PAF-1 as the platform, a chiral prolinamide catalytic site was introduced onto the framework of PAF-1 via a series of stepwise post-synthetic modifications,obtaining a novel PAF-supported chiral catalyst named PAF-1-NHPro. Then its enantioselective catalytic performance was studied by subjecting it to catalyze the model Aldol reaction between p-nitrobenzaldehyde and cyclohexanone.PAF-1-NHPro showed good diastereoselectivity and enantioselectivity with excellent and easy recyclability.
基金supported by Beijing Natural Science Foundation(2182094)the National Natural Science Foundation of China(51772300 and 51832008)the Youth Innovation Promotion Association of CAS(2018039)。
文摘High-efficiency photocatalysts are of great importance to satisfy the requirements of green chemistry nowadays.Here we reported a novel solar-driven photocatalyst fabricated by a facile surface modification method,with the two-dimensional carboxylated zinc phthalocyanine-carboxylated C60-titanium dioxide(Zn Pc-C3-Ti O2)nanosheets,in which the surface modifications of Zn Pc and C60derivative were designed to extend the absorption range and promote charge separation,respectively.Benefiting from the unique structure and positive synergetic effect,the Zn Pc-C3-Ti O2 nanocomposite shows promising applications in selective reduction of nitroarenes for high-value-added aromatic amines under solar light.Especially,for the photocatalytic reduction of nitrobenzene to aniline,the Zn Pc-C3-Ti O2 nanocomposite possesses both high efficiency and selectivity(up to 99%).
