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| 1 | Enhancement of room-temperature magnetoresistance in La_(0.6)Dy_(0.1)Sr_(0.3)MnO_3/Ag_x显示文摘The samples of La0.6Dy0.1Sr0.3MnO3/(Ag2O)x/2(x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.25, and 0.30) were prepared by using the solid-state reaction method.Their magnetic property, transport behavior, transport mechanism and magnetoresistance effect were studied through the measurements of magnetization-temperature(M-T) curves, ρ-T curves and the fitting of ρ-T curves.The results indicated that Ag could take part in the reaction when the doping amount is small.However, when the doping amount is comparatively large, Ag as metallic state mainly deposits on the grain boundary of La0.6Dy0.1Sr0.3MnO3, and then the system forms a two-phase composite.When the Ag doping amount is 30% mole ratio, the resistivity of the sample is one order of magnitude smaller than that of low doped samples, and its peak of magnetoresistance at 292 K and in the magnetic field of 0.2 T strengthens apparently and reaches 16.3%, which is over 7 times as large as 2.2% of La0.6Dy0.1Sr0.3MnO3.The two-phase composite system of magnetoresistance based on perovskite manganite consists of two parts:intrinsic magnetoresistance and extrinsic magnetoresistance.However, extrinsic magnetoresistance comes from spin-dependent scattering(SDS) and spin-polarized tunneling(SPT).Magnetoresistance near TC increases due to the contribution of intrinsic magnetoresistance and extrinsic magnetoresistance formed by SDS, and magnetoresistance at low temperature is extrinsic magnetoresistance formed by SPT. | SONG Qixiang NIU Xiaofei WANG Guiying TANG Yonggang CAI Zhirang PENG Zhensheng | 2010 | Rare Metals2010，29，2： | 10 |
| 2 | 重污染郊区环境中二氧化碳垂直分布的观测和模拟显示文摘CO2垂直分布对于大气传输模式和遥感测量的校准和验证非常重要。由于传统仪器质量大,配套系统体积大,边界层内CO2的原位测量比较少见。本研究利用基于低成本非分散红外(NDIR)传感器的微型化CO2监测仪器,搭载在系留气艇上,测量河北省石家庄西南部低对流层(0–1000米)的CO2垂直分布和气象参数。低成本传感器与传统气相色谱分析仪测得的结果一致,CO2浓度的总体趋势随高度增加而下降。研究结果有助于直接分析大气边界层中CO2浓度的垂直结构,为WRF等大气传输模式的校准和验证提供基础数据。 | BAO Zhongxiu HAN Pengfei ZENG Ning LIU Di CAI Qixiang WANG Yinghong TANG Guiqian ZHENG Ke YAO Bo | 2020 | Atmospheric and Oceanic Science Letters2020，13，4： | 2 |
| 3 | Genome assembly and resequencing analyses provide new insights into the evolution, domestication and ornamental traits of crape myrtle显示文摘Crape myrtle(Lagerstroemia indica)is a globally used ornamental woody plant and is the representative species of Lagerstroemia.However,studies on the evolution and genomic breeding of L.indica have been hindered by the lack of a reference genome.Here we assembled the first high-quality genome of L.indica using PacBio combined with Hi-C scaffolding to anchor the 329.14-Mb genome assembly into 24 pseudochromosomes.We detected a previously undescribed independent whole-genome triplication event occurring 35.5 million years ago in L.indica following its divergence from Punica granatum.After resequencing 73 accessions of Lagerstroemia,the main parents of modern crape myrtle cultivars were found to be L.indica and L.fauriei.During the process of domestication,genetic diversity tended to decrease in many plants,but this was not observed in L.indica.We constructed a high-density genetic linkage map with an average map distance of 0.33 cM.Furthermore,we integrated the results of quantitative trait locus(QTL)using genetic mapping and bulk segregant analysis(BSA),revealing that the major-effect interval controlling internode length(IL)is located on chr1,which contains CDL15,CRG98,and GID1b1 associated with the phytohormone pathways.Analysis of gene expression of the red,purple,and white flower-colour flavonoid pathways revealed that differential expression of multiple genes determined the flower colour of L.indica,with white flowers having the lowest gene expression.In addition,BSA of purple-and green-leaved individuals of populations of L.indica was performed,and the leaf colour loci were mapped to chr12 and chr17.Within these intervals,we identified MYB35,NCED,and KAS1.Our genome assembly provided a foundation for investigating the evolution,population structure,and differentiation of Myrtaceae species and accelerating the molecular breeding of L.indica. | Yang Zhou Tangchun Zheng Ming Cai Lu Feng Xiufeng Chi Ping Shen Xin Wang Zhiting Wan Cunquan Yuan Man Zhang Yu Han Jia Wang Huitang Pan Tangren Cheng Qixiang Zhang | 2023 | Horticulture Research2023，10，9： | 1 |
| 4 | Enhancement of DEN-induced liver tumourigenesis in hepatocyte-specificLass2-knockout mice coincident with upregulation of the TGF-β1-Smad4-PAI-1 axis显示文摘 | Lufang Chen Xiaodong Lu Tiantian Zeng Yuanyuan Chen Qian Chen Weijiang Wu Xun Yan Honghua Cai Zhijian Zhang Qixiang Shao Wenxin Qin | 2014 | Oncology Reports2014，，2： | 1 |
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