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| 1 | Valence electron structure analysis of refining mechanism of Sc and Ti additions on aluminum显示文摘The mechanism of the difference of refining effect between Sc and Ti adding to aluminum can not be explained substantially with traditional theory. Valence electron structures of Al-Ti and Al-Sc alloys have been studied by using the empirical electron theory of solids and molecules (EET). The covalent bond electron numbers and interfacial electron density differences are calculated. The conclusion is that, in the two alloys, different covalent bond electron numbers of nucleation particles, and different electron densities on the interface between the second phase particles and the matrix, fundamentally lead to the difference of refining effect between Sc and Ti adding to aluminum. | LI PieJie YE YiCong HE LiangJu | 2009 | Chinese Science Bulletin2009，54，5： | 2 |
| 2 | Laser ablation behavior and mechanism of C/SiC composite显示文摘 | Yonggang Tong Shuxin Bai Hong Zhang Yicong Ye | 2013 | Ceramics International2013，，6： | 1 |
| 3 | Valence electron structures analysis on refinement mechanism by Sc and Ti in pure Aluminum显示文摘 | LI Peijie Ye Yicong HE Liangju | 2008 | SCIENCE IN CHINA PRESS2008，53，： | 1 |
| 4 | Drug evaluations using a novel microphysiometer based on cell-based biosensors 显示文摘 | Wu Yicong Wang Ping Ye Xuesong | 2001 | Sen- sors and Actuators B2001，80，3： | 1 |
| 5 | Combined analysis of transcriptomics and metabolomics revealed complex metabolic genes for diterpenoids biosynthesis in different organs of Anoectochilus roxburghii显示文摘Objective:Diterpenoids with a wide variety of biological activities from Anoectochilus roxburghii,a precious medicinal plant,are important active components.However,due to the lack of genetic information on the metabolic process of diterpenoids in A.roxburghii,the genes involved in the molecular regulation mechanism of diterpenoid metabolism are still unclear.This study revealed the complex metabolic genes for diterpenoids biosynthesis in different organs of A.roxburghii by combining analysis of transcriptomics and metabolomics.Methods:The differences in diterpenoid accumulation in roots,stems and leaves of A.roxburghii were analyzed by metabonomic analysis,and its metabolic gene information was obtained by transcriptome sequencing.Then,the molecular mechanism of differential diterpenoid accumulation in different organs of A.roxburghii was analyzed from the perspective of gene expression patterns.Results:A total of 296 terpenoid metabolites were identified in the five terpenoid metabolic pathways in A.roxburghii.There were 38,34,and 18 diterpenoids with different contents between roots and leaves,between leaves and stems,and between roots and stems,respectively.Twenty-nine metabolic enzyme genes with 883 unigenes in the diterpenoid synthesis process were identified,and the DXS and FDPS in the terpenoid backbone biosynthesis stage and CPA,GA20ox,GA3ox,GA2ox,and MAS in the diterpenoid biosynthesis stage were predicted to be the key metabolic enzymes for the accumulation of diterpenoids.In addition,14 key transcription factor coding genes were predicted to be involved in the regulation of the diterpenoid biosynthesis.The expression of genes such as GA2ox,MAS,CPA,GA20ox and GA3ox might be activated by some of the 14 transcription factors.The transcription factor NTF-Y and PRE6 were predicted to be the most important transcription factors.Conclusion:This study determined 29 metabolic enzyme genes and predicted 14 transcription factors involved in the molecular regulation mechanism of diterpenoid metabolism in A.roxburghii,which provided a reference for the further study of the molecular regulation mechanism of the accumulation of diterpenoids in different organs of A.roxburghii. | Yicong Wei Jiayuan Zhang Keming Qi Ye Li Ying Chen | 2023 | Chinese Herbal Medicines2023，15，2： | 0 |
| 6 | Synthesis of Skipped Aminodienes by a Ni-Catalyzed Ring-Opening/Cross-Coupling Reaction of Vinylaziridines with Multifunctional Organoboronic Acids显示文摘Skipped dienes are of great importance but remain challenging to synthesize because of the presence of a sp hybrid carbon between the two alkenes.Herein,we have developed the first nickel-catalyzed regio-,(E)-stereo-and linear-selective ring-opening/cross-coupling reaction of vinylaziridines with organoboronic acids under mild conditions to construct various skipped aminodienes.The reaction exhibits wide functional-group compatibility,and could be adapted for the introduction of skipped aminodiene functionality into bioactive molecules. | Lu Zhang Qingfeng Du Yicong Luo Yuanlin Wang Feng Gao Yong Ye Wanbin Zhang | 2023 | Chinese Journal of Chemistry2023，41，22： | 0 |
| 7 | Stereodivergent Pd/Cu Catalysis for Asymmetric Desymmetric Alkylation of Allylic Geminal Dicarboxylates显示文摘AstereodivergentPd/Cucatalyst systemforasymmetric desymmetric alkylation of allylic geminal dicarboxylates has been developed,which was successfully applied to the asymmetric synthesis of β-hydroxycarbonylmotifs bearing a versatile carbon-carbon double bond in an enantio-and diastereodivergent manner.A wide scope of substrates including challenging alkylsubstituted,2-substituted,and3,3′-disubstitutedallylic species are compatible with this catalytic system,delivering the substituted products in high to excellent yieldsandwith excellent diastereo-(upto>20:1 dr)and enantioselectivities(up to>99%ee).Furthermore,the mechanism of this dual Pd/Cu catalytic system including:(1)the desymmetrization process ofgeminal dicarboxylates;(2)the origin of regioselectivity(branched or linear);(3)the enantio-and diastereoselectivity observed by changing the combinations of two chiral metal catalysts,have been carefully investigated by theoretical calculations. | Xiaohong Huo Ling Zhao Yicong Luo Yue Wu Yuwen Sun Guanlin Li Tatiana Gridneva Jiacheng Zhang Yong Ye Wanbin Zhang | 2022 | CCS Chemistry2022，4，5： | 0 |
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