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Publikováno v:
Green Chemistry. 17:2924-2930
A series of N-ferrocenylmethyl aziridino alcohol ligands bearing Frechet-type dendrimers were synthesized and applied in the asymmetric addition of diethylzinc to aldehydes affording chiral alcohols in excellent yields (up to 99%) and excellent enant
Autor:
Dong Li Chen, Long Mei Gan
Publikováno v:
Advanced Materials Research. :2449-2454
Based on Vegetation Dynamics Development Tool (VDDT), the 100(1989-2089) years forest landscape dynamics in the western margin of Sichuan Basin under 3 scenarios were simulated. Management measures such as closing the land for reforestation, forestat
Autor:
Dong Li Chen, Yan Zhang
Publikováno v:
Applied Mechanics and Materials. :1392-1395
Based on general procedure for the construction of nonstandard graphs, we first construct a nonstandard fuzzy graph. Subsequently, we define the nonstandard hull of a fuzzy graph, and discuss its properties.
Publikováno v:
Applied Mechanics and Materials. :2359-2362
By the method of nonstandard analysis, the definition of *-finite graph is given, and necessary and sufficient conditions of *-finite graph are obtained. Further, by the Transfer Principle, we apply the theory of finite graph to *-finite graph, embed
Publikováno v:
Applied Mechanics and Materials. :2978-2983
The Renewable Power Technology Training Course is described in the article which was developed by Renewable Power Technology training lab of State Grid Technology College. The course has been developed to train all new staff of the State Grid and was
Autor:
Dong Li Chen, Long Mei Gan
Publikováno v:
Advanced Materials Research. :4068-4073
Based on multi-spectrum satellite remote sensing (RS) images and GIS, the evolution characteristics of Irtysh River in Xinjiang were analyzed. The results show that the Irtysh River is a composite meander integrated by valley meander and free meander
Autor:
Dong Li Chen, Lei Huang
Publikováno v:
Advanced Materials Research. :2378-2382
The Vegetation Characteristics Model is based on the principle of DTM. The property values is the data of forest coverage of every small spot of forestry, By spatial interpolation, we can access continuous, accurate characteristic values of the data
Autor:
Dong-Li Chen, Jing Wu, Jian Chen, Shang-Wei Chen, Shu-Guang Fang, Sheng Chen, Dan Wu, Xing Tong
Publikováno v:
Journal of Agricultural and Food Chemistry. 58:4819-4824
The aglu of Aspergillus niger encodes the pro-protein of alpha-glucosidase, and the mature form of wild-type enzyme is a heterosubunit protein. In the present study, the cDNA of alpha-glucosidase was cloned and expressed in Pichia pastoris strain KM7
Publikováno v:
Tetrahedron. 54:5129-5142
Through the catalysis of RuCl2(PPh3)3, the functional groups of homoallylic alcohols are repositioned to give allylic alcohols with controlled regioselectivity. The reaction proceeds most efficiently in an aqueous media. The selectivity in product fo