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7篇 您的检索式:作者名="Donald Pan"
    题名 作者 年代 出处 被引量
1Modified local sands for the mitigation of harmful algal blooms显示文摘Gang Pan Jing Chen Donald M. Anderson 2011Harmful Algae2011,,4:2
2Use of bistrimethylsilylnted intermediates in the preparation of semisynthetie 7-amino-3-substituted- cephems, expedient syntheses of a new-3-cephalosporin 显示文摘Donald G Walker Pan R 1988Journal of organic chemistry1988,,53:1
3Modified local sands for the mitigation of harmful algal blooms显示文摘Pan G Chen J Donald M 2011Harmful Algae2011,10,4:1
4Separation of anionic surfactants on anion exchangers显示文摘Ning Pan Donald J Pietrzyk 1995Journal of Chromatography A1995,,706:1
5Context effects, new brand entry ,and consideration sets显示文摘Donald R Lehmann and Yigang Pan 1994Journal fo Marketing Research1994,31,8:1
6Widespread Bathyarchaeia encode a novel methyltransferase utilizing lignin-derived aromatics显示文摘Lignin degradation is a major process in the global carbon cycle across both terrestrial and marine ecosystems.Bathyarchaeia,which are among the most abundant microorganisms in marine sediment,have been proposed to mediate anaerobic lignin degradation.However,the mechanism of bathyarchaeial lignin degradation remains unclear.Here,we report an enrichment culture of Bathy-archaeia,named Candidatus Baizosediminiarchaeum ligniniphilus DL1YTT001(Ca.B.ligniniphilus),from coastal sediments that can grow with lignin as the sole organic carbon source under mesophilic anoxic conditions.Ca.B.ligniniphilus possesses and highly expresses novel methyltransferase 1(MT1,mtgB)for transferring methoxyl groups from lignin monomers to cob(I)alamin.MtgBs have no homology with known microbial methyltransferases and are present only in bathyarchaeial lineages.Heterologous expression of the mtgB gene confirmed O-demethylation activity.The mtgB genes were identified in metagenomic data sets from a wide range of coastal sediments,and they were highly expressed in coastal sediments from the East China Sea.These findings suggest that Bathyarchaeia,capable of O-demethylation via their novel and specific methyltransferases,are ubiquitous in coastal sediments.Tiantian Yu Haining Hu Xianhong Zeng Yinzhao Wang Donald Pan Longhui Deng Lewen Liang Jialin Hou Fengping Wang 2023mLife2023,2,3:0
7Analysis of Boundary Layer Structure,Turbulence,and Flux Variations before and after the Passage of a Sea Breeze Front Using Meteorological Tower Data显示文摘A detailed analysis of a sea breeze front(SBF)that penetrated inland in the Beijing–Tianjin–Hebei urban agglomeration of China was conducted.We focused on the boundary layer structure,turbulence intensity,and fluxes before and after the SBF passed through two meteorological towers in the urban areas of Tianjin and Beijing,respectively.Significant changes in temperature,humidity,winds,CO_(2),and aerosol concentrations were observed as the SBF passed.Differences in these changes at the two towers mainly resulted from their distances from the ocean,boundary layer conditions,and background turbulences.As the SBF approached,a strong updraft appeared in the boundary layer,carrying near-surface aerosols aloft and forming the SBF head.This was followed by a broad downdraft,which destroyed the near-surface inversion layer and temporarily increased the surface air temperature at night.The feeder flow after the thermodynamic front was characterized by low-level jets horizontally,and downdrafts and occasional updrafts vertically.Turbulence increased significantly during the SBF’s passage,causing an increase in the standard deviation of wind components in speed.The increase in turbulence was more pronounced in a stable boundary layer compared to that in a convective boundary layer.The passage of the SBF generated more mechanical turbulences,as indicated by increased friction velocity and turbulent kinetic energy(TKE).The shear term in the TKE budget equation increased more significantly than the buoyancy term.The atmosphere shifted to a forced convective state after the SBF’s passage,with near isotropic turbulences and uniform mixing and diffusion of aerosols.Sensible heat fluxes(latent heat and CO_(2)fluxes)showed positive(negative)peaks after the SBF’s passage,primarily caused by horizontal and vertical transport of heat(water vapor and CO_(2))during its passage.This study enhances understanding of boundary layer changes,turbulences,and fluxes during the passage of SBFs over urban areas.Ju LI Junxia DOU Donald H. LENSCHOW Mingyu ZHOU Lihong MENG Xiaobin QIU Yubing PAN Jingjiang ZHANG 2023Journal of Meteorological Research2023,37,6:0
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