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Chemical Research in Chinese Universities 2005年第5期21卷 545-548页

作者： zhang Shu-sheng YE Su-juan LI Xue-mei GU Shan-shan LIU qing College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

A new complex of N-（ 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl ） -thiocarbamic 4-hydroxy-benzoyl hydrazine dihydrate, C22 H27 N3 O10S · 2H2 O, was synthesized and its structure was determined by X-ray crystallography and TG/DTG methods. The compound belongs to the orthorhombic system, which crystallizes in space group P212121 , with a = 1. 0275 （ 3 ）, b = 1. 3419 （4）, c = 2. 0234 （ 6 ）, V = 2. 7899 （ 16 ） nm^3, and Z = 4. The hexopyranosyl ring adopts a ^4C1 conformation. All the substituents are at equatorial positions. The molecules are linked into a three-dimensional framework via intermolecular interactions. Atoms O5 and O9 show oositional disorders.

关键词： N-(2,3,4,6-Tetra-O-aeetyl-β-D-glueopyranose Synthesis Crystal structure Characterization

The Fano-Like Resonance in Self-Assembled Trimer Clusters

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Chinese Physics Letters 2013年第7期30卷 236-239页

作者： zhang mei LI Liang-Sheng ZHENG Ning SHI qing-Fan Faculty of Computers Guangdong University of TechnologyGuangzhou 510006 Science and Technology on Electromagnetic Scattering Laboratory Beijing 100854 School of Physics Beijing Institute of TechnologyBeijing 100081

We illustrate that three identical nanocylinders self-assembled into a trimer with a small interparticle gap separation support strong Fano-like *** asymmetry line shape of the Fano-like resonance can be controlled by modifying the cluster structures,and a narrow linewidth between a peak and a dip is displayed in the line *** resonant behaviors of the trimers could be strengthened by increasing the permittivity of the nanorods,and the asymmetry resonance is highly sensitive to the angle of the incident wave due to the orientation-dependent coupling between the cylinders in the *** present study provides a way to investigate the environmental change caused by the reshaped asymmetry line,which can be applied to future high-performance resonance sensors.

关键词： cylinders resonant narrow

Reactive oxygen species are involved in cell death in wheat roots against powdery mildew

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Journal of Integrative Agriculture 2019年第9期18卷 1961-1970页

作者： LI Cheng-yang zhang Nan GUAN Bin ZHOU Zhu-qing mei Fang-zhu Laboratory of Cell Biology College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070P.R.China College of Plant Sciences&Technology Huazhong Agricultural UniversityWuhan 430070P.R.China

Inoculation of wheat(Triticum aestivum L.)leaves with wheat powdery mildew fungus(Blumeria graminis ***)induces the cell death in adventitious *** oxygen species(ROS)play a key role in respond to biotic stress in *** study the involvement of ROS and the degree of cell death in the wheat roots following inoculation,ROS levels and microstructure of root cells were analyzed in two wheat cultivars that are susceptible(Huamai 8)and resistant(Shenmai 8)to powdery mildew *** 18 d after powdery mildew fungus inoculation,only Huamai 8 displayed the leaf lesions,while root cell death occurred in both *** 8 had a high level of ROS accumulation,which is associated with increased root cell degradation,while in Shenmai 8,there was little ROS accumulation correlating with slight root cell *** molecular study about the expression levels of ROS scavenging genes(MnSOD and CAT)in wheat roots showed that these genes expression decreased after the leaves of wheat was *** difference between Huamai 8 and Shenmai 8 on subcellular localization of H2 O2 and O2^–·was corresponded with the different down-regulation of the genes encoding for superoxide dismutase and catalase in two wheat *** results suggested that ROS were involved in the process by which powdery mildew fungus induced cell death in wheat roots.

关键词： powdery mildew wheat(Triticum aestivum L.) reactive oxygen species ultrastructure programmed cell death

KUROSHIO INTRUSION INTO THE SOUTH CHINA SEA

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Journal of Hydrodynamics 2006年第6期18卷 702-713页

作者： zhang qing-hua FAN Hai-mei QU Yuan-yuan Institute of Physical Oceanography Ocean University of China Qingdao 266003 China Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration Qingdao 266061China

In this article, the circulation of the South China Sea （SCS）, which is idealized as the rectangular basin with constant depth, is studied under Kuroshio boundary forces. Starting from the linearly quasi-geostrophic vorticity equation, the solution of the SCS circulation is given in the form of corrected Fourier series under proper boundary conditions. The results show that the intruded current flows westward and separates into the northward branch and the southward branch before arriving at the western boundary. The southward branch flows out of the SCS through the southwestern passage, at the same time, the induced cyclonic （anti-clockwise） ring almost occupies the middle and southern parts, and concomitant anti-cyclonic （clockwise） vortex appears between the cyclone and the western boundary. While the northward branch outflows through the northeastern passage, the anti-cyclonic （clockwise） ring is triggered at the northern part of the SCS. The above two vortexes are both intensified if the south-entering and the north-leaving current loop intrusion are superposed. The outer flow of the northern vortex flows westward, then northward, and then eastward, and it is very similar to the configuration of the SCS Warm Current （SCSWC） at the northern part of the SCS, thus, a kind of generating mechanism of the SCSWC is presented.

关键词： Kuroshio boundary forces South China Sea (SCS) SCS Warm Current (SCSWC)

A New Method for Electromagnetic Time Reversal in a Complex Environment

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Chinese Physics Letters 2012年第2期29卷 105-107页

作者： KONG Qi SHI qing-Fan YU Guang-Ze zhang mei School of Physics Beijing Institute of TechnologyBeijing 100081 School of Computer Guangdong Industrial UniversityGuangzhou 510006

A new time reversal method is proposed to infer the location of an unknown extending target in a complex *** our method,the wavelet analysis and scalogram of energy density are first introduced into the electromagnetic time reversal process to improve the accuracy and to eliminate *** computation results show that the new technique can refocus the unknown target better than using traditional time reversal.

关键词： Electromagnetic eliminate Complex

Synthesis of nano-TiO2 assisted by diethylene glycol for use in high efficiency dye-sensitized solar cells

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Chinese Chemical Letters 2017年第4期28卷 765-770页

作者： Lin Liu Xiang-mei Yu Bao zhang Shu-Xian Meng Ya-qing Feng School of Chemical Engineer and Technology Tianjin University Tianjin 300072 China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China

The performance of dye-sensitized solar cells（DSSCs） consisting of anatase TiO_2 nanoparticles that were synthesized via a hydrothermal method was *** synthesized TiO_2 nanoparticles were characterized by X-ray diffraction（XRD）,nitrogen sorption analysis,scanning electron microscopy（SEM）,high resolution transmission electron microscopy（HRTEM）,and UV-vis *** the J-Vcurve,electrochemical impedance spectroscopy（EIS）,and open-circuit voltage decay（OCVD） measurement were applied to evaluate the photovoltaic performance of *** with the commercial TiO_2nanoparticles（P25）,the synthesized-TiO_2 nanoparticles showed better *** adding diethylene glycol（DEG） before the hydrothermal process,the synthesized TiO_2 nanoparticles（hereafter referred to as TiO_2-DEG particles） shows narrower size distribution,larger specific surface area,higher crystallinity,and less surface defects than TiO_2（DEG free） *** analysis of photovoltaic properties of DSSCs based on TiO_2-DEG particles showed that the recombination of electron-hole pairs was decreased and the trapping of carries in grain boundaries *** was believed that the photoelectrode fabricated with the as-prepared TiO_2 nanoparticles improved the loading amount of dye sensitizers（N719）.and enhanced the photocurrent of the *** a result,the TiO_2-DEG particle based cells achieved a photo-to-electricity conversion efficiency（η） of 7.90%,which is higher than 7.53%for the cell based on TiO2（DEG free） and 6.59%for the one fabricated with P25.

关键词： Hydrothermal TiO2 Diethylene glycol Photoelectrode Dye-sensitized solar cells

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非线性时间序列相空间重构参数选取方法研究

山东建筑大学学报 2010年第6期25卷 619-624页

作者：耿淑娟姚庆梅张明玉张君捧山东建筑大学信息与电气工程学院山东济南250101

基于非线性时间序列相空间重构的延迟时间和嵌入维数这两个参数的选取互不相关的观点,提出用互信息法确定时间延迟,用伪邻近点法和平均伪邻近点法相结合的方法确定嵌入维数的新思路。通过对几种典型的混沌动力学系统的数值验证,表明该... 详细信息

基于非线性时间序列相空间重构的延迟时间和嵌入维数这两个参数的选取互不相关的观点,提出用互信息法确定时间延迟,用伪邻近点法和平均伪邻近点法相结合的方法确定嵌入维数的新思路。通过对几种典型的混沌动力学系统的数值验证,表明该方案能够确定出相空间重构的有效延迟时间和最佳嵌入维数,能够从时间序列中有效地重构原系统的相空间。

关键词：应用数学相空间重构互信息法伪邻近点

Identification and Expression of Floral Organ Homeotic Genes from Alpinia oblongifolia (Zingiberaceae)

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Journal of Integrative Plant Biology 2009年第2期51卷 155-166页

作者： Yong-mei Xia Xue-mei Gao qing-Jun Li Xishuangbanna Tropical Botanical Garden the Chinese Academy of Sciences Menglun Mengla Yunnan 666303 China

Current understanding of the classical ABC model of floral development has provided a new set of characters to evaluate floral evolution. However, what is still lacking is a clear assessment of this genetic program across monocots. Here, to investigate the evolution of members of class A and B genes in monocots, we report the sequence characteristic and transcript expression of three new MADS-box genes in Alpinia oblongifolia Hayata. Sequence and phylogenetic analysis reveals that these genes are FUL-like and AP3-1ike. Therefore, they were termed AoFL1, AoFL2 and AoAP3. AoFL1 contains the FUL motif, but AoFL2 lacks this motif. Their expression revealed by in situ hybridization may reflect the ancestral function of FUL-like genes in the specification of inflorescence and floral meristems. The AoAP3 gene contains two conserved motifs, the PI-derived and paleoAP3 motifs. The AoAP3 transcripts located to the corolla and stamen, and hybridization signals were detected in the central whorl. These expression patterns suggest that the functions of homologous organ identity genes are diversified in A. oblongifolia. The implications of these findings on the conservation of homologous gene function are discussed.

关键词： ABC model floral organ identity in situ hybridization MADS-box genes phylogenetic analysis.

Identification of an immune-related gene signature for predicting prognosis and immunotherapy efficacy in liver cancer via cell-cell communication

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World Journal of Gastroenterology 2024年第11期30卷 1609-1620页

作者： Jun-Tao Li Hong-mei zhang Wei Wang Dong-qing Wei College of Mathematics and Information Science Henan Normal UniversityXinxiang 453007Henan ProvinceChina College of Computer and Information Engineering Henan Normal UniversityXinxiang 453007Henan ProvinceChina State Key Laboratory of Microbial Metabolism and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China

BACKGROUND Liver cancer is one of the deadliest malignant tumors *** has provided hope to patients with advanced liver cancer,but only a small fraction of patients benefit from this treatment due to individual *** immune-related gene signatures in liver cancer patients not only aids physicians in cancer diagnosis but also offers personalized treatment strategies,thereby improving patient survival *** several methods have been developed to predict the prognosis and immunotherapeutic efficacy in patients with liver cancer,the impact of cell-cell interactions in the tumor microenvir-onment has not been adequately *** To identify immune-related gene signals for predicting liver cancer prognosis and immunotherapy *** Cell grouping and cell-cell communication analysis were performed on single-cell RNA-sequencing data to identify highly active cell groups in immune-related *** active immune cells were identified by intersecting the highly active cell groups with B cells and T *** significantly differentially expressed genes between highly active immune cells and other cells were subsequently selected as features,and a least absolute shrinkage and selection operator(LASSO)regression model was constructed to screen for diagnostic-related *** genes that were selected more than 5 times in 10 LASSO regression experiments were included in a multivariable Cox regression ***,3 genes(stathmin 1,cofilin 1,and C-C chemokine ligand 5)significantly associated with survival were identified and used to construct an immune-related gene *** The immune-related gene signature composed of stathmin 1,cofilin 1,and C-C chemokine ligand 5 was identified through cell-cell *** effectiveness of the identified gene signature was validated based on experi-mental results of predictive immunotherapy response,tumor mutation burden analysis,immune cell infiltrat

关键词： Liver cancer Cell-cell communication Gene signature Prognosis Immunotherapy Single-cell RNA sequencing

Permafrost change in Northeast China in the 1950s-2010s

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Advances in Climate Change Research 2021年第1期12卷 18-28页

作者： zhang Zhong-Qiong WU qing-Bai HOU mei-Ting TAI Bo-Wen AN Yu-Ke State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhou730000China China Meteorological Administration Training Centre Beijing100081China Gansu Province Transportation Planning Survey&Design Institute Limited Liability CompanyLanzhou730000China

Permafrost in Northeast China is highly sensitive to climate *** degradation significantly affects forest and vegetation ecosystems,as well as the safety of engineering projects and other man-made ***,the permafrost change in the region is still *** study uses metrological data from 258 weather stations,alongside reanalysis data,and other environmental data to investigate permafrost degradation and its related environmental impacts in Northeast China from the 1950s to *** show that the total permafrost area decreased from 4.8×10^(5)to 3.1×10^(5)km^(2)from the 1950s to the *** southern limit of permafrost moved 0.1-1.1°northward,and its average elevation rose 160.5 *** the study period,the degradation of predominantly continuous permafrost,and discontinuous and island permafrost was more pronounced than that of sparsely island *** south boundary of those three permafrost zones northward by 0-3.4°,0-5.5°and 0.4-1.1°,the average altitude raised by 339.2 m,208.3 m,67.1 *** permafrost degradation shows the elevation and latitude *** degradation is mainly caused by the rising of surface temperatures and the impacts of other environmental *** snowfall warming the ground of 1.1-10.2℃in cold seasons and rainfall cooling on surface conditions in warm seasons,those may result in temporal and spatial differences in permafrost ***,there are lack of researches in the impact of environment factors on soil temperatures,moisture and permafrost degradation.

关键词： Northeast China Climate warming Permafrost degradation Impact of environmental factors