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Intercropping of rice varieties increases the eff iciency of blast control through reduced disease occurrence and variability

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Journal of Integrative Agriculture 2016年第4期15卷 795-802页

作者： HAN Guang-yu LANG Jie sun yan WANG Yun-yue ZHU You-yong LU Bao-rong The Key Laboratory for Agro-biodiversity and Pest Control Ministry of EducationCollege of Plant Protection Yunnan Agricultural University Key Laboratory for Biodiversity Science and Ecological Engineering Ministry of EducationInstitute of Biodiversity Science Fudan University

Creating a crop-heterogeneous system by intraspecific mixtures of different rice varieties can substantially reduce blast diseases. Such variety mixtures provide an ecological approach for effective disease control, maintaining high yields with the minimum fungicide applications. Whether such an approach is universally applicable for random rice variety combinations and what is the variation pattern of the diseases under intercropping still remains unclear. We conducted two-year large-scale field experiments involving 47 rice varieties/lines and 98 variety-combinations to compare the occurrence of rice blast in monoculture and intercropping plots at multiple sites. In the experiments, the plant height of the selected tradi- tional varieties was about 30 cm taller, and their life cycle was 10 days longer, than that of the improved rice varieties. The monoculture included either traditional or modern rice varieties grown in separate plots. The intercropping included both traditional and modern rice varieties planted together in the same plots. Results from the field experiments under natural disease conditions demonstrated significant reduction for rice blast disease in intercropping plots, compared with that in monoculture plots. For traditional varieties, the average blast incidence reduced from -26% in monoculture to -10% in intercropping, and the disease severity reduced from -17 in monoculture to -5 in intercropping. For modern varieties, the average blast incidence reduced from -19% in monoculture to -10% in intercropping, and the severity from -10 in mono- culture to -4 in intercropping. Traditional rice varieties （-72%） had a much greater increase in the efficiency of disease control than modern varieties （-60%）. In addition, substantially lower values of variance in the blast incidence and severity was detected among the variety combinations in intercropping plots than in monoculture plots. Based on these results, we conclude that the intercropping or mixture

关键词： Oryza sativa cropping system disease suppression disease variation mixed-planting pure-planting cropheterogeneity

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Fiber loop ring-down cavity integrated U-bent single-mode-fiber for magnetic field sensing

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Photonics Research 2016年第6期4卷 322-326页

作者： Yaofei Chen Tiegen Liu qun Han Wenchuan yan Lin Yu College of Precision Instrument and Opto-Electronics Engineering Tianjin University Department of Mechanical Engineering Columbia University Key Laboratory of Opto-electronics Information Technology (Tianjin University) Ministry of Education

A novel magnetic field sensing system based on the fiber loop ring-down technique is proposed in this paper. In the fiber loop, a U-bent single-mode-fiber structure coated with magnetic fluid(MF) serves as the sensing head, and an erbium-doped fiber amplifier(EDFA) is introduced to compensate for the intrinsic loss of the cavity. The ring-down time of the system varies with the change of applied magnetic field due to the tunable absorption coefficient and refractive index of the MF. Therefore, measurement of the magnetic field can be realized by monitoring the ringdown time. The experimental results show that the performance of the system is extremely dependent on the interrogation wavelength, because both the gain of the EDFA and the loss of the sensing head are wavelength *** found that at the optimal wavelength, the ratio of the gain to loss attained its maximum. The sensing system was experimentally demonstrated and a sensitivity of-0.5951 μs∕Oe was achieved.

关键词： mode down ring EDFA Fiber loop ring-down cavity integrated U-bent single-mode-fiber for magnetic field sensing

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Study of large area hydrogenated microcrystalline silicon p-layers for back surface field in crystalline silicon solar cells

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Science China(Technological Sciences) 2011年第1期54卷 63-69页

作者： BAN qun Martin HANKER Dietmar BORCHERT SHEN Hui Institute for Solar Energy System Sun Yat-sen University Guangzhou 510006 China Fraunhofer Institute for Solar Energy Systems Laboratory and Service Center Gelsenkirchen 45884 Germany

A series of hydrogenated microcrystalline silicon （μc-Si：H） p-layers for back surface field in crystalline silicon solar cells were deposited on glass substrates by the developed large area （45 cm×45 cm） plasma enhanced chemical vapour deposition processor operating at 13.56 MHz and various values of source gas trimethylboron （TMB） to H2 flowratio. The influence of deposition parameters on the large area p-layer performance was intensively studied, as well as the thin film uniformity, optical, electrical and structural performances by Raman, PTIR, Ellipsometry, etc. Arrhenius and Tauc plots were used to discuss the μc-Si：H thin film＇s activation energy and the defects state distribution. When amorphous-microcrystalline transition state was obtained, the deposited p-doped μc-Si：H layers showed specific resistance of 38.3 Ω^-1cm1 at the flowratio of 0.66% and high crystallinity of 45%-50% with no further treatment. The effect of source gas flowratio, deposition rate, and source gas partial pressure on μc-Si：H thin film＇s performance was also investigated.

关键词： μc-Si:H flowratio uniformity band structure

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Amyloidosis of the Unilateral Renal Pelvis,Ureter and Urinary Bladder:a Case Report

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Chinese Medical Sciences Journal 2011年第3期26卷 197-200页

作者： Dong-liang Pan yan-qun Na Wujieping Urology Medical Center of Peking University Department of UrologyPeking University Shougang HospitalBeijing 100144China

AMYLOIDOSIS of more than two urinary organs happened in one person is very *** we reported a patient with amyloidosis of the left renal pelvis, ipsilateral ureter as well as urinary bladder occurring successively.

关键词： amyloidosis bladder renal pelvis

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Classification and characteristics of tight oil plays

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Petroleum Science 2016年第1期13卷 18-33页

作者： Xin-Shun Zhang Hong-Jun Wang Feng Ma Xiang-Can sun yan Zhang Zhi-Hui Song Research Institute of Petroleum Exploration & Development Petro China Oil & Gas Survey China Geological Survey

Based on the latest conventional–unconventional oil and gas databases and relevant reports,the distribution features of global tight oil were analyzed.A classification scheme of tight oil plays is proposed based on developed tight oil *** tight oil plays are defined by considering the exploiting practices of the past few ***,potential tight oil areas are mainly distributed in 137 sets of shale strata in 84 basins,especially South America,North America,Russia,and North ***,craton,and continental rift basins *** craton basins,tight oil mainly occurs in Paleozoic strata,while in continental rift basins,tight oil occurs in Paleozoic–Cenozoic *** oil mainly accumulates in the Cretaceous,Early Jurassic,Late Devonian,and Miocene,which correspond very well to six sets of globaldeveloped source *** on source–reservoir relationship,core data,and well-logging data,tight oil plays can be classified into eight types,above-source play,below-source play,beside-source play,in-source play,between-source play,in-source mud-dominated play,insource mud-subordinated play,and interbedded-source ***,between-source,interbedded-source,and in-source mud-subordinated plays are major targets for global tight oil development with high ***,in-source mud-dominated and in-source plays are less satisfactory.

关键词： tight reservoir shale strata dominated Paleozoic logging sandstone hydrocarbon favorable

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教师粗暴行为与青少年运动员睡眠状况的关系:核心自我评价和负面心理的链式中介效应

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浙江体育科学 2024年第3期46卷 83-89,97页

作者：田奔奔孙焱张致铜胡书培华东交通大学体育与健康学院江西南昌330013

目的:探讨教师粗暴行为与青少年运动员睡眠状况的关系及核心自我评价与负面心理在其中的中介作用。方法:采用教师粗暴量表、睡眠状况量表、核心自我评价量表、负面心理量表对258名青少年运动员施测。结论:①男教师粗暴行为对青少年运动... 详细信息

目的:探讨教师粗暴行为与青少年运动员睡眠状况的关系及核心自我评价与负面心理在其中的中介作用。方法:采用教师粗暴量表、睡眠状况量表、核心自我评价量表、负面心理量表对258名青少年运动员施测。结论:①男教师粗暴行为对青少年运动员睡眠状况的直接预测作用不显著,而女教师粗暴行为对睡眠状况有显著的负面预测作用。②负面心理在男教师粗暴行为与青少年运动员睡眠状况中起到完全中介作用,核心自我评价与负面心理在女教师粗暴行对青少年运动员睡眠状况之中起到链式中介作用。③经过模型检验存在显著性的青少年运动员睡眠性别差异。

关键词：教师粗暴行为睡眠状况青少年运动员核心自我评价负面心理

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Synthesis and characterization of a new catalyst for RhB degradation constructed by[SiMo_(12)O_(40)]^(4-) anionic cluster

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Chinese Chemical Letters 2015年第2期26卷 187-192页

作者： Hao Wang Yi-Ping Chen Zhu-Chai You Meng-Xi Zhou Ning Zhang yan-Qiong sun College of Chemistry Fuzhou University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences

A Keggin-type polyoxomolybdate[H2biim]{Ni（biim）3（SiMO12O40）}[biim =1H,1＇H-[2,2＇]biimidazolyl]has been synthesized under hydrothermal condition and characterized by XRD,temperature-dependent IR,TG,temperature-induced and magnetism-induced 2D infrared correlation spectroscopy（2D-IR COS）and UV-vis DRS in order to explore the relationship between structure and *** 2D-IR COS spectroscopy indicates that the terminal Mo-Oμ/υbonds are more sensitive than the bridging Mo=Ot,bands to temperature variation,which is in agreement with the conclusion of temperature-dependent ***-dependent 2D-IR COS spectroscopy reveals the stretching vibration of the Mo=Ot,occurs prior to the stretching vibration of the Mo-Oμ/υ,which is due to the coordination environment and the valence of the Si *** stability of compound 1 is investigated via TG and temperature-dependent *** RhB degradation,compound 1 shows good photocatalytic abilities.

关键词： 2D infrared correlation spectroscopy Photocatalytic degradation of RhB Silicon molybdenum polyoxometalate

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Modulating p-d orbital hybridization by CuO/Cu nanoparticles enables carbon nanofibers high cycling stability as anode for sodium storage

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Rare Metals 2023年第12期42卷 4039-4047页

作者： Zhi-Jia Zhang He-Yi sun Yue-Fang Chen Yu-Wen Zhao Meng-Meng Zhang Chun-Sheng Li yan sun Zhong-Hui Gao Hui-Jun Li Yong Jiang School of Materials Science and Engineering Institute of Quantum Materials and DevicesState Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin 300387China School of Chemistry and Life Sciences School of Materials Science&Engineeringthe Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaSuzhou University of Science and TechnologySuzhou 215009China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology By the Ministry of Education of ChinaTianjin UniversityTianjin 300072China Faculty of Engineering and Information Sciences University of WollongongWollongongNSW 2522Australia

Carbon nanofibers(CNFs)have been extensively studied as anode materials for sodium-ion batteries due to their high conductivity,large aspect ratio and good electrochemical *** low specific capacity and low first cycle efficiency of CNFs,however,have hindered its practical ***,we present a facile strategy to synthesize a novel CNFs decorated with Cu/CuO nanoparticles(Cu-CNFs)using magnetron sputtering ***/CuO nanoparticles were uniformly distributed on the surface of *** to the density functional theory(DFT)calculation,Cu/CuO nanoparticles d-orbitals and CNFs p-orbitals present hybridization states,and the Na~+adsorption energy of the modified CNFs decreases from-2.14 to-2.97 *** Cu-CNFs composites exhibit excellent sodium storage properties,presenting a desirable initial Coulombic efficiency of 76%and a high specific reversible capacity of 300 mAh·g^(-1)at 0.1 A·g^(-1)after 400 ***-CNFs anode has excellent cycling stability under high current density,maintaining a high capacity of 150 mAh·g^(-1)at 1 A·g^(-1)after 6000 *** magnetron sputtering to regulate the electronic structure provides a new thought for improving the electrochemical performance of carbon materials.

关键词： Carbon nanofibers Cu/CuO nanoparticles Orbital hybridization Magnetron sputtering Density functional theory calculation

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The honeybee gut resistome and its role in antibiotic resistance dissemination

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Integrative Zoology 2023年第6期18卷 1014-1026页

作者： Huihui sun Hu LI Xue ZHANG yan LIU Hao CHEN Li ZHENG Yifan ZHAI Hao ZHENG Institute of Plant Protection Shandong Academy of Agricultural SciencesJinanChina Sanya Institute of China Agricultural University SanyaChina Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijingChina Key Laboratory of Natural Enemies Insects Ministry of Agriculture and Rural AffairsJinanChina Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Diseases and Insect Pests JinanChina

There is now general concern about widespread antibiotic resistance,and growing evidence indicates that gut microbiota is critical in providing antibiotic *** is an important pollinator;the incidence of antibiotic resistance genes in honeybee gut causes potential risks to not only its own health but also to public and animal health,for its potential disseminator role,thus receiving more attention from the *** analysis results reveal that the gut of honeybee serves as a reservoir of antibiotic resistance genes,probably due to antibiotics application history in beekeeping and horizontal gene transfer from the highly polluted *** antibiotic resistance genes accumulate in the honeybee gut and could be transferred to the pathogen,even having the potential to spread during pollination,tending,social interactions,*** acquired resistance traits may cause fitness reduction in bacteria whereas facilitating adaptive evolution as *** review outlines the current knowledge about the resistome in honeybee gut and emphasizes its role in antibiotic resistance dissemination.

关键词： antibiotic resistance genes(ARGs) evolution gut microbiota honeybee transmission

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角茴香中1个新的吡嗪类生物碱

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药学学报 2024年第1期59卷 183-187页

作者：刘云胡梦雅张文静范雨欣徐瑞雯朱登辉孙彦君冯卫生陈辉河南中医药大学药学院河南郑州450046 呼吸疾病中医药防治省部共建协同创新中心河南郑州450046

采用硅胶、ODS、MCI等柱色谱以及半制备液相等现代色谱分离技术对角茴香(Hypecoum erectum L.)正丁醇萃取部位的化学成分进行分离纯化,得到4个吡嗪类生物碱。运用现代波谱学方法(1D NMR、2D NMR、UV、IR、MS等)鉴定结构分别为hyperectpy... 详细信息

采用硅胶、ODS、MCI等柱色谱以及半制备液相等现代色谱分离技术对角茴香(Hypecoum erectum L.)正丁醇萃取部位的化学成分进行分离纯化,得到4个吡嗪类生物碱。运用现代波谱学方法(1D NMR、2D NMR、UV、IR、MS等)鉴定结构分别为hyperectpyrazin A(1)、1′S-(6-methylpyrazin-2-yl)-ethane-1′,2′-diol(2)、2-hydroxymethyl-6-methylpyrazin(3)和pyrazine-2-carboxylic acid(4)。化合物1为1个新的吡嗪类生物碱,化合物2~4为首次从角茴香中分离得到,并首次通过Mo_(2)(OAc)_(4)诱导的CD谱确定了化合物2的绝对构型。采用乙酰胆碱酯酶抑制模型和脂多糖诱导的RAW264.7巨噬细胞炎症模型,对化合物1~4进行体外活性评价,其中化合物2和4表现出一定的乙酰胆碱酯酶抑制活性,在终浓度为50μmol·L^(-1)时对乙酰胆碱酯酶的抑制率分别为44.40%和43.99%。

关键词：角茴香化学成分吡嗪类生物碱 hyperectpyrazin A 乙酰胆碱酯酶抑制活性

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