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The Ecological Effects of Young Elm Trees Belt-Pumpkin Strip Intercropping System at the Agro-Pastoral Ecotone in Northern China

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Agricultural Sciences in China 2010年第8期9卷 1183-1193页

作者： DU Xiong DOU Tie-ling FENG Li-xiao zhang Wei-hong zhang Li-feng College of Agronomy Agricultural University ofHebei Baoding 071001 P.R.China zhangbei Agricultural Resource and Ecological Environment Key Field Research Station Ministry of Agriculture Zhangjiakou 076450 P. R. China College of Plant Protection Agricultural University of Hebei Baoding 071001 P.R. China

Young elm trees belt-pumpkin strip intercropping was studied to solve the actual problem of resource losses in the large barren area resulted from reconverting cultivated land into forest in the agro-pastoral ecotone in northern China. The final objective was to realize effective utilization of the barren land with both ecological improvement and economic development. Field experiments were conducted together with laboratory analysis. The results indicated that the soil moisture level was remarkably increased in young elm trees belt-pumpkin strip intereropping because the pumpkin vines covered the gap between pumpkin planting-furrow and elm trees belt. The water use efficiency of the intercropping system was increased by 23.7-163.3% as compared with the single cropping. Elm trees belt-pumpkin strip intercropping changed the sequential succession trend of the grasses growing in the gap of the pumpkin planting-furrow. The annual grasses become the dominant vegetation. The nutritive value as fodder and yield of the annual grasses were also increased remarkably. The biomass of pumpkin, elm trees and grasses under intercropping increased by 24.4, 28.4 and 144.4%, respectively, as compared with those under single cropping. The land use efficiency was increased by 132%. It was also indicated that the soil erosion from the intercropping land was not increased due to pumpkin plantation. The differences in the soil erosion among intercropped area, elm trees belt and pumpkin strip with single cropping were not remarkable. Therefore, it was concluded that young elm trees belt-pumpkin strip intercropping is an effective way to utilize the barren land between the young elm trees belt and realize synergistic enhancement of ecological benefit and economic profit.

关键词： ecotone young elm trees belt-pumpkin strip intercropping water use efficiency land use efficiency ecological benefit economic profit

On the weak Lyα emission line of BL Lacertae objects

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Research in Astronomy and Astrophysics 2019年第10期19卷 145-151页

作者： Jia Bu Ren-yi Ma Tao-Tao Fang xiao-Di Yu Xin-Wu Cao Department of Astronomy and Institute of Theoretical Physics and Astrophysics Xiamen University Xiamen 361005 China SHAO-XMU Joint Center for Astrophysics Xiamen 361005 China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China

Recent studies reveal that weak Lyα emission line may be a ubiquitous feature of nearby BL Laceratae objects(BL Lacs). We present a survey of the Lyα emission lines in BL Lacs, with a focus on data obtained by the Cosmic Origins Spectrograph onboard the Hubble Space Telescope. Among the11 selected targets, seven show a clear detection of the intrinsic Lyα emission line, while one manifests a marginal detection. Two of these intrinsic Lyα lines are newly detected in this work(FBQS J1217+3007 and3 C 66 A). Most selected BL Lacs are either high or intermediate-frequency peaked BL Lacs, with the only exception being one low-frequency peaked BL Lac. A strong anti-correlation between the line equivalent width and the continuum luminosity was found. The possible sources of ionizing photons that are responsible for production of the Lyα emission line are studied based on a widely accepted detailed accretion-jet model. It is found that the clouds of the broad line region are unlikely to be located in the jet cone region with an inclination angle of less than 10 degrees. Contributions from the jet and disk to the emission lines are found to be comparable. Additionally, a possible way to constrain the accretion rate from the emission line is proposed.

关键词： galaxies active-BL Lacertae objects general-ultraviolet galaxies-galaxies jets

Synthesis,Characterization,and DNA Binding Properties of Dinuclear Copper(Ⅱ) Complex [Cu_2(TATP)_2(L-Leu)_2(ClO_4)_2]_2·2H_2O

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Chemical Research in Chinese Universities 2008年第4期24卷 401-406页

作者： GU Qin LIN Qing-bin LIU ying-ju LE Xue-yi FENG xiao-long Department of Applied Chemistry College of Sciences South China Agricultural University Guangzhou 510642 P. R. China Center of Analysis and Measurement Zhongshan University Guangzhou 510275 P. R. China

A dinuclear copper（Ⅱ） complex[Cu2（TATP）2（L-Leu）2（CIO4）2]2·2H2Owas synthesized and characterized, where, TATP=1,4,8,9-tetraazatriphenylene, and L-Leu=L-leucinate. The complex was crystallized in the triclinic space group P1, with two independent molecules in a unit cell. Two Cu（Ⅱ） ions in each complex [Cu2（TATP）2（L-Leu）2（CIO4）2] molecule were found to be in different coordination geometries, i.e., Cu2 or Cu4 of a distorted square-pyramidal geometry coordinated with two nitrogens of TATP, the amino nitrogen and one carboxylate oxygen of L-Leu and one oxygen of perchlorate, and Cul or Cu3 with an octahedral geometry coordinated with the above stated similar coordinated atoms, and another carboxylate oxygen of L-Leu coordinating to Cu2 or Cu4. The complex can interact with CT-DNA by an intercalative mode and cleave pBR322 DNA in the presence of ascorbate.

关键词： Copper(Ⅱ) complex 1,4,8,9-Tetraazatriphenylene L-Leucinate DNA

A straightforward spectral emissivity estimating method based on constructing random rough surfaces

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Light(Science & Applications) 2023年第12期12卷 2577-2588页

作者： Zezhan zhang Mengchao Chen Lichuan zhang Hongzu Li Hairui Huang Zilong zhang Peifeng Yu yi Niu Shan Gao Chao Wang Jing Jiang Clean Energy Materials and Engineering Center School of Integrated Circuit Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengduChina College of Information and Communication Engineering Harbin Engineering UniversityHarbinChina Department of Precision Instrument Tsinghua UniversityBeijingChina

Spectral emissivity is an essential and sensitive parameter to characterize the radiative capacity of the solid surface in scientific and engineering applications,which would be non-negligibly affected by surface ***,there is a lack of assessment of the effect of roughness on emissivity and a straightforward method for estimating the emissivity of rough *** paper established an estimating method based on constructing random rough surfaces to predict rough surface(Geometric region)emissivity for metal *** on this method,the emissivity of ideal gray and non-gray body surfaces was calculated and *** calculated and measured spectral emissivities of GH3044,K465,DD6,and TC4 alloys with different roughness were *** results show that the emissivity increases with the roughness degree,and the enhancement effect weakens with the increase of roughness or emissivity due to the existing limit(emissivityε=1.0).At the same time,the roughness would not change the overall spectral distribution characteristics but may attenuate the local features of the spectral *** estimated results are in good agreement with the experimental data for the above alloys'rough *** study provides a new reliable approach to obtaining the spectral emissivity of rough *** approach is especially beneficial for measuring objects in extreme environments where emissivity is difficult to ***,this study promotes an understanding of surface morphology's effect mechanism on emissivity.

关键词： alloys roughness estimating

Prolonged overall survival in gastric cancer patients after adoptive immunotherapy

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World Journal of Gastroenterology 2015年第9期21卷 2777-2785页

作者： Guo-Qing zhang Hong Zhao Jian-Yu Wu Jin-Yu Li Xiang Yan Gang Wang Liang-Liang Wu xiao-Gang zhang yi Shao Yu Wang Shun-Chang Jiao Department of Clinical Oncology Chinese PLA General Hospital Laboratory of Tumor Research Center Chinese PLA General Hospital Beijing Immunotech Applied Science Limited

AIM:To assess the efficacy of immunotherapy with expanded activated autologous lymphocytes(EAALs) in gastric ***:An observational study was designed to retrospectively analyze the clinical data of 84 gastric cancer patients,of whom 42 were treated by EAAL immunotherapy plus conventional treatment and another 42 only received conventional treatment(control group).EAALs were obtained by proliferation of peripheral blood mononuclear cells from patients followed by phenotype *** data including age,gender,clinical stage,chemotherapeutic regimens,hospitalization,surgical,radiotherapy,and survival data were collected along with EAAL therapy details and side *** were followed and the relationship between treatment and overall survival(OS) data obtained for the immunotherapy and control groups were compared *** safety of EAAL immunotherapy was also ***:After in vitro culture and proliferation,the percentages of CD3+,CD3+CD8+,CD8+CD27+,CD8+CD28+,and CD3+CD16+/CD56+cells increased remarkably(P < 0.05),while the percentages of CD3+CD4+,CD4+CD25+,and CD3-CD16+/CD56+(natural killer cells) were overtly decreased(P < 0.05); no significant change was observed in CD4+CD25+CD127- cells(P =0.448).Interestingly,OS in the immunotherapy group was significantly higher than that in the control group,with 27.0 and 13.9 mo obtained for the two groups,respectively(P =0.028,HR =0.573,95%CI:0.347-0.945).These findings indicated a 42.7% decrease in the risk of *** addition,we found that clinical stage and application of EAAL immunotherapy wereindependent prognostic factors for gastric cancer ***,the OS in stage Ⅲc and Ⅳ patients that had received surgery was prolonged after EAAL immunotherapy(P < 0.05).Importantly,in vitro induction and proliferation of EAAL were easy and biologically ***:Overall,EAAL adoptive immunotherapy might prolong the OS in gastric cancer patients.

关键词： Adoptive immunotherapy Gastric cancer Expanded act

High-efficiency PdNi single-atom alloy catalyst toward cross-coupling reaction

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Chinese Chemical Letters 2024年第7期35卷 480-483页

作者： Baokang Geng Xiang Chu Li Liu Lingling zhang Shuaishuai zhang xiao Wang Shuyan Song Hongjie zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Chemistry Tsinghua UniversityBeijing 100084China

The preparation of Pd-based catalysts with rich electrons and a high atom dispersion rate is of great significance for improving the reactivity of cross-coupling reactions,which is a powerful tool for pharmaceutical and fine chemical ***,we report a PdNi single-atom alloy(SAA)catalyst in which isolated Pd single atoms are anchored onto the surface of Ni nanoparticles(NPs)applied for Suzuki coupling reactions and Heck coupling *** 0.1%PdNi SAA exhibits extraordinary catalytic activity(reaction rate:17,032.25 mmol h^(-1)gPd^(-1))toward the Suzuki cross-coupling reaction between 4-bromoanisole and phenylboronic acid at 80℃for 1 *** excellent activity is supposed to attribute to the 100 percent utilization rate of Pd atoms and the highly stable surface zero-valance Pd atoms,which provides abundant sites and electrons for the adsorption and fracture of the C-X(X=Cl,Br,I)***,our work demonstrates the excellent application prospect of SAAs for cross-coupling reactions.

关键词： Single-atom alloy Cross-coupling reaction Palladium catalysis Heterogeneous catalysis High-efficiency

Effects of emodin and baicalein on rats with severe acute pancreatitis

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World Journal of Gastroenterology 2005年第14期11卷 2095-2100页

作者： Xi-Pingzhang Zhong-FangLi xiao-GongLiu Yong-TaoWu Jun-XianWang Kang-MinWang yi-FengZhou DepartmentofGeneralSurgery FirstPeople'sHospitalofHangzhouHangzhou310006ZhejiangProvinceChina DepartmentofGeneralSurgery SecondHospitalofXi'anJiaotongUniversityXi'an710004ShaanxiProvinceChina PharmaceuticalCollegeofXi'anJiaotongUniversity Xi'an710016ShaanxiProvinceChina DepartmentofPathology SecondHospitalofXi'anJiaotongUniversityXi'an710004ShaanxiProvinceChina DepartmentofDigestion FirstPeople'sHospitalofHangzhouHangzhou310006ZhejiangProvinceChina

AIM: To investigate the therapeutic effects of emodin in combination with baicalein on severe acute pancreatitis (SAP) rats and to explore the mechanism of SAP. METHODS: A total of 112 SAP rats induced by retrograde injection of 5% sodium taurocholate into the biliarypancreatic duct, randomly assigned to a untreated group and three treated groups emodin group, combined emodin and baicalein group, and sandostatin group. Meanwhile, another 28 other rats were selected as sham operation (SO) group. There were 28 rats in each group, 8 rats were in 3 and 6 h groups respectively, and 12 rats in 12 h group. At each time-points, survival rates, ascites volumes, pathological lesion scores of pancreas tissues, serum amylase, tumor necrosis factor-α and IL-6 levels were determined as the indexes of therapeutic effects. RESULTS: The survival rate at 12 h was significantly higher in three treated groups than in untreated group. The ascites volume at 12 h was remarkably less in combined and sandostatin groups than in emodin group, but there was no difference between combined group and sandostatin group (P＞0.05). Serum amylase levels at all time-points were significantly lower in three treated groups than in untreated group. However, they had no difference among treated groups (P＞0.05). Serum TNF-α were lower in three treated groups than in untreated group at all time points. Among the three treated groups, at 6 h, the TNF-α levels of combination and sandostatin groups were lower than those of emodin group. These was no difference between combined and sandostantin. Serum IL-6 concentration at 3 h were lower in combined and sandostatin groups than in untreated group, but at 6 and 12 h they were lower in all treated groups than in untreated group and the combined and sandostatin groups and in emodin group, no difference was found between combined and sandostatin groups at all time-points (P＞0.05). The pathological scores of pancreas at all time points were significantly lower in thre

关键词： Emodin Severe acute pancreatitis

The review of RFID applications in global postal and courier services

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The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 106-110页

作者： zhang xiao-dan YUE Shu-jie WANG Wei-min Postal communication management department Shijiazhuang Post and Telecommunication Technical College Shijiazhuang 050021 China

On the basis of several practical applications in many countries, this article reviews the potential market scale of radio frequency identification （RFID） and its applications in global postal and courier services through studies and analyses. It gives some suggestions and options in the development of RFID and its application in postal and courier services.

关键词： RFID application tag postal service courier

Corrosion resistance and antibacterial activity of different zones in TA2 weldment by TIG welding

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Rare Metals 2020年第12期39卷 1449-1456页

作者： Yan-Ping Zhu Chang-yi Li Lian-Yun zhang Department of Prosthodontics Tianjin Stomatological HospitalTianjin300041China School of Stomatology Tianjin Medical UniversityTianjin300070China

The corrosion resistance behavior of TA2 pure titanium processed by tungsten inert gas(TIG)welding was investigated in artificial saliva solution at 37℃.By metallographic examination,electrochemical measurement technology,and electrochemical impedance spectroscopy(EIS),the corrosion resistance of the base metal(BM),heat-affected zone(HAZ),and weld metal(WM)were *** examination experiments show that welding process would cause the growth of grain *** addition,phase change happens in the HAZ and *** change of grain size and phase would influence the generation of the original passive *** electrochemical tests show that the BM,HAZ,and WM are all equipped with good corrosion *** welded joint shows a better corrosion resistance than the original *** is shown that the BM with the lowest corrosion potential and the biggest corrosion current has a worse corrosion resistance than WM as well as ***(Ag)nanoparticles can be distributed on the WM zone of Ti *** WM zone of Ti with Ag coating considerably enhances the antibacterial activity of Ti implants.

关键词： Titanium Tungsten inert gas welding Corrosion resistance Artificial saliva solution Antibacterial activity