4篇
您的检索式：作者名="SHENG Libo"
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| 1 | Low-cost Binary 128 Floating-point FMA Unit Design with SIMD Support显示文摘 | Huang Libo Ma Sheng Shen Li | 2012 | IEEE Transactions on Computers2012，61，5： | 1 |
| 2 | Two types of coumarins-specific enzymes complete the last missing steps in pyran- and furanocoumarins biosynthesis显示文摘Pyran-and furanocoumarins are key representatives of tetrahydropyrans and tetrahydrofurans,respectively,exhibiting diverse physiological and medical bioactivities.However,the biosynthetic mechanisms for their core structures remain poorly understood.Here we combined multiomics analyses of biosynthetic enzymes in Peucedanum praeruptorum and in vitro functional verification and identified two types of key enzymes critical for pyran and furan ring biosynthesis in plants.These included three distinct P.praeruptorum prenyltransferases(PpPT1e3)responsible for the prenylation of the simple coumarin skeleton 7 into linear or angular precursors,and two novel CYP450 cyclases(PpDC and PpOC)crucial for the cyclization of the linear/angular precursors into either tetrahydropyran or tetrahydrofuran scaffolds.Biochemical analyses of cyclases indicated that acid/base-assisted epoxide ring opening contributed to the enzyme-catalyzed tetrahydropyran and tetrahydrofuran ring refactoring.The possible acid/base-assisted catalytic mechanisms of the identified cyclases were theoretically investigated and assessed using site-specific mutagenesis.We identified two possible acidic amino acids Glu303 in PpDC and Asp301 in PpOC as vital in the catalytic process.This study provides new enzymatic tools in the epoxide formation/epoxide-opening mediated cascade reaction and exemplifies how plants become chemically diverse in terms of enzyme function and catalytic process. | Yucheng Zhao Yuedong He Liangliang Han Libo Zhang Yuanzheng Xia Fucheng Yin Xiaobing Wang Deqing Zhao Sheng Xu Fei Qiao Yibei Xiao Lingyi Kong | 2024 | Acta Pharmaceutica Sinica B2024，14，2： | 0 |
| 3 | Effects of High Pressure on the Surface Plasmon Resonance of Copper and Silver Nanocrystals显示文摘We used a diamond anvil cell(DAC)to control the deformation of synthesized copper nanorods and silver nanoparticles.And we measured the surface plasmon resonance of copper nanorods and silver nanoparticles,which exhibit redshifts or blueshifts.The surface plasmon resonance shows an abnormal blue shift for both copper nanorods and silver nanoparticles.The solvents of copper nanorods and silver nanoparticles are n-hexane and water,where the pressure loads include quasi-hydrostatic and non-hydrostatic. | LUO Zha LIU Hao SHEN Wei SHI Kun CHEN Ankang SHENG Libo SUI Yongming ZOU Bo | 2022 | Chemical Research in Chinese Universities2022，38，3： | 0 |
| 4 | Ecological health analysis of wetlands in the middle reaches of Yangtze River under changing environment显示文摘Changes in wetland ecosystems have a critical impact on the local ecology and species diversity.Different development scenarios and policies are key factors influencing their changes.Therefore,we studied changes of wetlands in the middle Yangtze River basin(MYRB)in 2001-2020,and a patch-generated land use simulation(PLUS)model and random forest(RF)method were applied to predict and analyze the changes under different scenarios in the MYRB in the future(i.e.2035-2095).The results indicated that:(1)The regions with high wetland proportions were concentrated in the central and eastern MYRB in 2001-2020,with a 1.5%decrease in overall wetland area;(2)The RF could simulate the future ecological quality with training and testing accuracies of 0.98 and 0.92,respectively;(3)Remote Sensing Ecological Index(RSEI)less than 0.5 in the central and eastern regions and 13.3%reduction in the northwest in the SSP245 scenario.In general,the study provides a basis for future regional studies of ecosystem quality and provides data to support wetland conservation and management. | Shengqing Zhang Xiaoyan Zhai Peng Yang Jun Xia Sheng Hu Libo Zhou Cai Fu | 2023 | International Journal of Digital Earth2023，16，1： | 0 |
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