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8篇 您的检索式:作者名="Yunkui Li"
    题名 作者 年代 出处 被引量
1Anthocyanin profi les and color properties of red wines made from Vitis davidii and Vitis vinifera grapes显示文摘Spine grape(Vitis davidii Foex.)is an important wild grape species native to China.Fifteen red spine grape clones and three red Vitis vinifera grape varieties were used to evaluate the differences in the anthocyanin profiles and color properties of wines made from V.davidii and V.vinifera grapes.Among spine wines,‘Junzi#2’wine had the highest total phenolic and total anthocyanin,‘Xiangzhenzhu’wine had the highest total flavonoids,and‘Junzi#1’wine had the highest total tannin.The anthocyanin compositions of all of the spine wines were dominated by Mv-3,5-diglucoside.The total individual anthocyanin contents in spine wines,except‘Gaoshan#5’,‘Junzi#5055’,‘Junzi#5061’,and‘Junzi#5044’,were signifi cantly higher than in V.vinifera wines.Most of the spine wines had a stronger red intensity and a brighter chroma with a bluer hue than V.vinifera wines.Correlation analysis revealed that the color properties were closely related to the anthocyanin composition.These results suggest that wines made from spine grapes may be useful for the wine industry for their color properties and high individual anthocyanin contents.Yanlun Ju La Yang Xiaofeng Yue Yunkui Li Rui He Shenglin Deng Xin Yang Yulin Fang 2021Food Science and Human Wellness2021,10,3:5
2The First Outbreak of Omicron Subvariant BA.5.2—Beijing Municipality,China,July 4,2022显示文摘On July 4,2022,the first case of Omicron subvariant BA.5.2 in Beijing Municipality was discovered in Yanqing District.The case was a 49-yearold Chinese male who had arrived in Shanghai Municipality via international flight DL9927 from North Carolina,U.S.on June 15.He stayed in a hotel for the 14-day arrival quarantine and was discharged on June 30.He arrived in Beijing via domestic flight MU5103 on July 1 and was transferred point-to-point from the airport to his residence community in Yanqing District.On July 3,his sample was collected through community mass screening and reported positive in the next morning.The case had received 3 doses of Moderna’s mRNA vaccines in the U.S.,with the last shot on May 26,2022.Zhaomin Feng Ying Shen Shuang Li Jia Li Shaohua Wang Zhenquan Zhang Yunkui Shen Fu Li Yang Pan Quanyi Wang Da Huo 2022China CDC weekly2022,4,30:4
3Banking system reform,earnings quality and credit allocation显示文摘This paper investigates credit allocation before and after the 2003 banking system reform in China. We find that relationships between earnings quality and new short-term loans, long-term loans and total loans in listed companies changed significantly after the banking system reform, especially in stateowned listed companies. Further investigation shows that due to the influence of rent-seeking, banks have eased the earnings requirements of non-stateowned listed companies. These findings enhance our understanding of the economic consequences of the banking system reform and of credit discrimination under the new regime.Xiuli Zhu Lianjun Li Yunkui Xue 2012China Journal of Accounting Research2012,,3:2
4Vertical ionization energies of halogen anions in solution显示文摘Based on the constrained equilibrium state theory,the nonequilibrium solvation energy is derived in the framework of the continuum model.The formula for spectral shift and vertical ionization energy are deduced for a single sphere cavity with the point charge assumption.The new model is adopted to investigate the vertical ionization for halogen atomic and molecular anions X(X = Cl,Br,I,Cl2,Br2,I2) in aqueous solution.According to the calculation using the CCSD-t/aug-cc-pVQZ method in vacuum,our final estimated vertical ionization energies in solution are very close to the experimental observations,while the traditional nonequilibrium solvation theory overestimates these vertical ionization energies.CHENG XueMin,ZHU Quan,WANG XingJian,LI YunKui & LI XiangYuan College of Chemical Engineering,Sichuan University,Chengdu 610065,China 2010Science China Chemistry2010,53,6:1
5Czochralski Growth and Optical Spectral Properties of GInGG:Cr^3+ Single Crystal显示文摘Li Yunkui Yin Shaotang 2000Progress in Crystal Growth and Characterization of Materials2000,40,:1
6Czochralski Growth and Optical Spectral Properties of GInGG:Cr3 + Single Crystal显示文摘Li Yunkui Yin Shaotang 2000Progress in Crystal Growth and Characterization of Materials2000,,:1
7Azetidine synthesis enabled by photo-induced copper catalysis via [3+1] radical cascade cyclization显示文摘Azetidines are an important type of saturated,highly strained,fourmembered,nitrogen-containing heterocyclic compound.These compounds serve as important raw materials,intermediates,and catalysts in organic synthesis,as well as important active units in amino acids,alkaloids,and pharmaceutically active compounds.Thus,the development of an efficient and concise method to construct azetidines is of great significance in multiple disciplines.In this work,we reported on the photo-induced copper-catalyzed radical annulation of aliphatic amines with alkynes to produce azetidines.Jianye Li Lu Yu Yun Peng Bin Chen Rui Guo Xiaodong Ma Xiao-Song Xue Yunkui Liu Guozhu Zhang 2022The Innovation2022,3,3:0
8The protective effect of cyclodextrin on the color quality and stability of Cabernet Sauvignon red wine显示文摘The impact of cyclodextrins(CDs)on wine quality and stability remains largely unknown.This study systematically assessed the protective effect of the post-fermentation addition of CDs on color stability of red wine from the viewpoints of color characteristics,copigmentation and phenolic profiles.The grey relational analysis(GRA)and principal component analysis(PCA)methods were employed to dissect the key effective determinants related to color quality.The addition of CDs induced a significant hyperchromic effect of 8.19-25.40%,a significant bathochromic effect and an enhancement of the color intensity.Furthermore,the evolution of anthocyanin forms and the content of monomeric anthocyanins revealed that β-CD is a superior favorable cofactor during wine aging,but for long-term aging,2-HP-β-CD and 2-HP-γ-CD are more beneficial in promoting the formation of polymerized anthocyanins and color stability.This work provides an important reference for the use of CDs to enhance the color quality and stability of red wines.Caiyun Liu Lulu Wu Shuyue Fan Yongsheng Tao Yunkui Li 2024Journal of Integrative Agriculture2024,23,1:0
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