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How light affect the magnetotactic behavior and reproduction of ellipsoidal multicellular magnetoglobules?

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Journal of Oceanology and Limnology 2021年第6期39卷 2005-2014页

作者： Xinxin QIAN Yicong ZHAO Claire-Lise SANTINI Hongmiao PAN Tian XIAO haitao chen Tao SONG Jinhua LI Francois ALBERTO Sophie BRUSTLEIN Long-Fei WU State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Aix Marseille University CNRSLCBCenturiIM2BIMMMarseille 13009France International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms(LIA-MagMC) CNRS-CASMarseille 13402France CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Aix Marseille University CenturiMarseille 13009France

Magnetotactic bacteria(MTB)synthesize intracellular magnetic organelles,magnetosomes,which consist of magnetic crystals that are enveloped in a *** are organized into a chain(s)and confer on cells a magnetic dipolar *** magnetic property allows MTB cells to align and swim along geomagnetic field lines,a movement referred to as *** MTB species change their swim direction in response to illumination by UV,violet and blue *** we analyzed the polarity of morphology,magnetism,and motion in Mediterranean multicellular magnetotactic prokaryotes,also called,magnetoglobules or *** magnetoglobules were assembled from 60-80 cells into an asymmetric ellipsoidal morphology with a relative narrow and large *** swam dominantly northward,parallel to the direction of the magnetic field,with the narrow-end as the leading *** response to a reversal in the direction of the magnetic field,they aligned quickly along the magnetic field lines and kept swimming ***,under constant illumination,385-nm UV light,magnetoglobules changed their swimming direction southward anti-parallel to the direction of the magnetic field,with the large-end as the leading *** change from a northward to southward direction occurred along with an increase of swimming speed.A minimum of 35-mW/cm^(2) irradiance of UV light was sufficient to trigger the swimming *** radiation also triggered the unidirectional division of *** these results revealed a coordination of the polarity of magnetoglobule morphology,magnetic moment,and swimming orientation,in response to magnetic and optical *** UV triggered the reversal of magnetotaxis and magnetoglobule division indicating the ecological significance of light for multicellular magnetotactic prokaryotes.

关键词： photo-response magnetic alignment coordinated swimming

Enhanced second-harmonic generation from two-dimensional MoSe_(2) on a silicon waveguide

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Light(Science & Applications) 2017年第1期6卷 505-511页

作者： haitao chen Vincent Corboliou Alexander S Solntsev Duk-Yong Choi Maria A Vincenti Domenico de Ceglia Costantino de Angelis Yuerui Lu Dragomir N Neshev Nonlinear Physics Centre Research School of Physics and EngineeringAustralian National UniversityCanberraACT 2601Australia Institut d’Optique Graduate School UniversitéParis-SudPalaiseau 91127France Laser Physics Centre Research School of Physics and EngineeringAustralian National UniversityCanberraACT 2601Australia National Research Council Charles M.Bowden LaboratoryRedstone ArsenalValhermoso SpringsAL 35898-5000USA Department of Information Engineering and INO CNR University of BresciaVia Branze 38Brescia 25123Italy Research School of Engineering College of Engineering and Computer ScienceAustralian National UniversityCanberraACT 2601Australia

Two-dimensional transition-metal dichalcogenides(TMDCs)with intrinsically broken crystal inversion symmetry and large secondorder nonlinear responses have shown great promise for future nonlinear light ***,the sub-nanometer monolayer thickness of such materials limits the length of their nonlinear interaction with ***,we experimentally demonstrate the enhancement of the second-harmonic generation from monolayer MoSe_(2) by its integration onto a 220-nm-thick silicon *** on-chip integration allows for a marked increase in the interaction length between the MoSe_(2) and the waveguide mode,further enabling phase matching of the nonlinear *** demonstrated TMDC–silicon photonic hybrid integration opens the door to second-order nonlinear effects within the silicon photonic platform,including efficient frequency conversion,parametric amplification and the generation of entangled photon pairs.

关键词： 2D material MoSe_(2) SHG waveguide

Development of 2BZJ-3/4 Precision Planter for Soybean Narrow-row flatdense Planting Method

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Journal of Northeast Agricultural University(English Edition) 2010年第3期17卷 43-47页

作者： XIANG Dexiang chen haitao JI Wenyi Engineering College Northeast Agricultural University Harbin 150030 China Facility and Equipment Institute of National Modem Soybean Industry Technology System Harbin 150030 China

Based on the study on cultivation models of soybean narrow-row-flat-dense planting under the conditions of different between-row spacing and inter-plant spacing by using the comparison field experiment, and technical studies of the contour following the seeder unit, the anti-block, the lateral and stratified the deep fertilizing, according to the design ideas of planting units integration and variable between-row spacing from 30 to 45 cm, the 2BZJ-3/4 precision planter matched with 18-32 hp tractors has been developed for the popularization of the narrow-row-flat-dense planting soybean technique by means of Virtual Prototyping （VP） technology.

关键词： soybean narrow-row-flat-dense planting method planter VP technology

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立式轴流大豆育种脱粒机参数优化

农业工程学报 2012年第5期28卷 19-25页

作者：侯守印陈海涛东北农业大学工程学院哈尔滨150030

为寻求对立式轴流大豆育种专用脱粒机的脱粒、分离与清选性能影响的结构与工作参数最优组合,对其进行了参数优化试验。采用二次回归正交旋转中心组合优化试验方法,以滚筒线速度、脱粒间隙、喂入量和植株体积含水率为影响因素,含杂率、... 详细信息

为寻求对立式轴流大豆育种专用脱粒机的脱粒、分离与清选性能影响的结构与工作参数最优组合,对其进行了参数优化试验。采用二次回归正交旋转中心组合优化试验方法,以滚筒线速度、脱粒间隙、喂入量和植株体积含水率为影响因素,含杂率、破碎率、未脱净率、夹带损失率、飞溅损失率和沉积率为目标函数,对影响该机脱粒性能的结构与工作参数进行优化试验研究。结果表明:当植株体积含水率14%～20%,滚筒线速度6.5～8.3m/s,脱粒间隙为15mm,喂入量为2.4kg/min时,含杂率低于0.5%,破碎率低于1%,未脱净率低于2%,夹带损失率低于0.7%,飞溅损失率与沉积率为零。该研究可为立式轴流大豆育种专用脱粒机的产品定型设计提供依据。

关键词：试验优化育种立式轴流脱粒机大豆

杀菌型水稻秸秆纤维基地膜制造工艺参数优化研究

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农业工程学报 2019年第11期35卷 306-314页

作者：陈海涛陈双超刘爽东北农业大学工程学院

为提高农药有效利用率、减少农药使用量,对负载广谱杀菌剂多菌灵的杀菌型水稻秸秆纤维基地膜制造工艺参数组合进行了优化研究。应用四因素五水平二次正交旋转中心组合试验方法,以湿强剂、施胶剂、胶黏剂浓度和涂层厚度为影响因子,选择... 详细信息

为提高农药有效利用率、减少农药使用量,对负载广谱杀菌剂多菌灵的杀菌型水稻秸秆纤维基地膜制造工艺参数组合进行了优化研究。应用四因素五水平二次正交旋转中心组合试验方法,以湿强剂、施胶剂、胶黏剂浓度和涂层厚度为影响因子,选择杀菌型水稻秸秆纤维基地膜的干抗张力、湿抗张力、透气度、降解周期、农药有效利用率为响应函数,实施了组合试验,结果表明:当工艺参数组合为湿强剂质量分数0.8%~0.9%、施胶剂质量分数0.5%~0.7%、胶黏剂浓度2.0%、涂布厚度20μm时,杀菌型水稻秸秆纤维基地膜干抗张力≥35 N、湿抗张力≥15 N、透气度≤2μm/(Pa·s)、降解周期≥60 d、农药有效利用率≥80%。研究结果表明该地膜不仅提高了秸秆纤维基地膜的各项性能指标且增加了秸秆纤维基地膜的杀菌功能,而且为广谱杀菌剂多菌灵增效减量和广谱杀菌型水稻秸秆纤维基地膜的研发提供了参考依据。

关键词：农药膜秸秆杀菌优化

Doping bioactive elements into a collagen scaffold based on synchronous self-assembly/mineralization for bone tissue engineering

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Bioactive Materials 2020年第4期5卷 844-858页

作者： Huanhuan Liu Mingli Lin Xue Liu Ye Zhang Yuyu Luo Yanyun Pang haitao chen Dongwang Zhu Xue Zhong Shiqing Ma Yanhong Zhao Qiang Yang Xu Zhang School of Stomatology Hospital of StomatologyTianjin Medical UniversityTianjin300070China Department of Stomatology Zhongshan Hospital of Xiamen UniversityXiamenFujian361004China The Third Central Clinical College of Tianjin Medical University Tianjin300170China Department of Spine Surgery Tianjin HospitalTianjin300211China Institute of Stomatology Tianjin Medical UniversityTianjin300070China

Pure collagen is biocompatible but lacks inherent osteoinductive,osteoimmunomodulatory and antibacterial *** obtain collagen with these characteristics,we developed a novel methodology of doping bioactive elements into collagen through the synchronous self-assembly/mineralization(SSM)of *** the SSM model,amorphous mineral nanoparticles(AMN)(amorphous SrCO3,amorphous Ag3PO4,etc.)stabilized by the polyampholyte,carboxymethyl chitosan(CMC),and collagen molecules were the primary components under acidic *** the pH gradually increased,intrafibrillar mineralization occurred via the self-adaptive interaction between the AMNs and the collagen microfibrils,which were self-assembling;the AMNs wrapped around the microfibrils became situated in the gap zones of collagen and finally transformed into *** collagen scaffolds(Sr-CS)promoted in vitro cell proliferation and osteogenic differentiation of rat bone marrow mesenchymal stromal cells(rBMSCs)and synergistically improved osteogenesis of rBMSCs by altering the macrophage ***-doped collagen scaffolds(Ag-CS)exhibited in vitro antibacterial effects on ***,as well as cell/tissue ***,Sr-CS implanted into the calvarial defect of a rat resulted in improved bone ***,the SSM model is a de novo synthetic strategy for doping bioactive elements into collagen,and can be used to fabricate multifunctional collagen scaffolds to meet the clinical challenges of encouraging osteogenesis,boosting the immune response and fighting severe infection in bone defects.

关键词： Collagen scaffold Bioactive elements Synchronous self-assembly/mineralization Bone tissue engineering

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相干涡旋和刃型位错在海洋湍流中的相互作用

中国激光 2024年第8期51卷 126-136页

作者：陈海涛高曾辉成都师范学院物理与工程技术学院四川成都611130 宜宾学院四川省计算物理高校重点实验室四川宜宾644000

类比相干光束中刃型位错概念,提出一种新的相干奇点——相干刃型位错。对高斯-谢尔模光束携带的相干涡旋和刃型位错在海洋湍流中的相互作用进行研究。基于扩展的惠更斯-菲涅耳原理,得到了该光束在海洋湍流环境下的交叉谱密度表达式,并... 详细信息

类比相干光束中刃型位错概念,提出一种新的相干奇点——相干刃型位错。对高斯-谢尔模光束携带的相干涡旋和刃型位错在海洋湍流中的相互作用进行研究。基于扩展的惠更斯-菲涅耳原理,得到了该光束在海洋湍流环境下的交叉谱密度表达式,并将其用于研究相干涡旋和刃型位错的相互作用。研究发现:相干刃型位错在相干涡旋的作用下发生断裂并转化成相干涡旋。在光束传输过程中,光场中有单个或成对相干涡旋的产生或湮灭现象发生。二者之间的作用特点不仅与传输距离有关,还受光束初始参数和海洋湍流参数的影响。二者之间的作用规律与自由空间光涡旋和刃型位错的作用规律不同。

关键词：激光光学奇点光学部分相干光束相干奇点相干涡旋海洋湍流

基于虚拟样机动力学仿真的大豆扶禾器参数优化

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农业工程学报 2012年第18期28卷 23-29页

作者：陈海涛顿国强东北农业大学工程学院哈尔滨150030

针对大豆扶禾器因结构及作业参数不合理而造成割台损失增加的问题,在大豆植株性状及秸秆材料物理性能测定的基础上,应用Solidworks软件虚拟设计了大豆植株及扶禾器,并应用机械系统动力学仿真软件***构建其三维运动仿真模型,实现了在ADAM... 详细信息

针对大豆扶禾器因结构及作业参数不合理而造成割台损失增加的问题,在大豆植株性状及秸秆材料物理性能测定的基础上,应用Solidworks软件虚拟设计了大豆植株及扶禾器,并应用机械系统动力学仿真软件***构建其三维运动仿真模型,实现了在ADAMS/View环境下扶禾过程的运动仿真。利用Design-Expert6.0.10软件,采用二因素三水平正交试验方法,以作业速度及扶禾器倾角为影响因素,以扶禾器对植株x(作业方向)、y(垂直向上)、z(水平向左)三轴方向作用力为目标函数表征扶禾性能及割台损失,对影响扶禾性能的参数进行优化模拟试验研究,并进行了田间验证试验。结果表明,当作业速度为0.9m/s,扶禾倾角为22°时,扶禾器对大豆植株作用力x轴52.3N、y轴73.2N、z轴95.9N,扶禾效果最好且割台损失率1.19%。该研究为大豆扶禾器设计提供了理论参考。

关键词：农业机械优化速度大豆扶禾器虚拟技术碰撞

A Case of giant Intra Scrotal Angiolipoma

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A Case of giant Intra Scrotal Angiolipoma