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A study on Fricke-PVA-xylenol orange hydrogel dosimeter for E-beam radiotherapy

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Nuclear Science and Techniques 2009年第3期20卷 152-156页

作者： CAO Fangqi YANG liming CHEN Jie LIN Han FAN Jinchen RONG Liang LUO Wenyun zha.Yuanzi WU Guohua Department of Chemical Engineering and Technology School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Department of Radiation Oncology Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200092 China

A Fricke-PVA-xylenol orange (FPX) hydrogel dosimeter, in good transparency, was prepared by physical crosslinking for three-dimensional dose measurements. The process of mixing the chemical dosimeter with the PVA solution was carried out at room temperature, which reduced the influence of auto-oxidation rate. Gradation in color was obviously observed with different distance from the radiation source after 6 MeV electron beam irradiation for radiotherapy. The effects of irradiation dose and three components of the FPX gel dosimeter, i.e. ferrous ions, xylenol orange (XO) and sulphuric acid on sensitivity and stability of dose response were investigated by UV-vis spectropho-tometric measurement. The dose response of the FPX gel dosimeter was linear in the range 0~2.0 Gy. The orthogonal test was employed to find the optimal composition of the gel dosimeter with a sensitivity of about 0.095 cm-1·Gy-1. It was found that XO concentration greatly affected the sensitivity of dose response and lower concentrations of the ferrous ion and XO gave higher sensitivity within the range 0~2.0 Gy.

关键词： PVA 放射量测定器 FPX 凝胶体核技术

Preparation and characterization of FPGX hydrogel dosimeters

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Nuclear Science and Techniques 2010年第1期21卷 60-62页

作者： Xiao Ruijia Yang liming Chen Jie Qian Qiang Rong Liang Cao Fangqi Luo Wenyun Dong Xiaoqing zha.Yuanzi Wu Guohua School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Department of Radiation Oncology Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200092 China

A three dimensional Fricke-(PVA-glutaraldehyde)-xylenol orange (FPGX) hydrogel dosimeter was prepared by chemical crosslinking *** determination was performed by measuring the absorbance change of the dosimeter before and after irradiation using UV-Vis spectrophotometer at 585 *** dose response of the FPGX hydrogel dosimeter related to absorbance change was linear,when it was irradiated by X-ray in the range of 0~2 *** stability of the dosimeter before and after irradiation was evaluated by studying the change of absorbance with time.

关键词：剂量计水凝胶制备紫外可见分光光度计 X射线照射表征化学交联法聚乙烯醇

Herbicidal Activities of Eupatorium adenophorum Extracts by 3 Extraction Methods

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Plant Diseases and Pests 2012年第2期3卷 57-59页

作者： Yougui zha.Yongqing LI liming FAN Min YE Chun XIAO Jing WANG Key Lab of the Ministry of Education for Agro-biodiversity and Disease Control College of Plant Protection Yunnan Agricultural University

[ Objective ] The paper was to screen the better extraction method for herbicidal active substances of Eupatorium adenophorum. [ Method ] Three com- mon extraction methods, Soxhlet extraction, ultrasonic extraction and conventional extraction method, were used to prepare E. adenophorum extracts, and the herblcidal activity of E. adenophorum extracts extracted by 3 methods was studied by seed germination method. [ Result] The extraction rate of Soxhlet extraction was the highest of （22.54 ± 0.48 ）%, and the herbicidal activities of E. adenophorum extracted by Soxhlet extraction was relatively stronger. [ Conclusion] Soxhlet extraction was the better extraction method for herbicidal active substances of E. adenophorum.

关键词： E. adenophorum Extracts Herbicidal activity Extraction method China

Improvement of Teaching Experimental Design of Pesticide Bioassays

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Plant Diseases and Pests 2012年第5期3卷 35-36页

作者： Jing WANG Bin CHEN Chun XIAO Min YE liming FAN Yougui zha Key Lab of the Ministry of Education for Agro-biodiversity and Disease Control College of Plant ProtectionYunnan Agricultural University

For mistakes taken in pesticide bioassays, teaching experimental design is improved in the paper, so as to let students explore and analyze in teaching experiments to get a deeper understanding of theoretical knowledg... 详细信息

关键词： Pesticide Bioassay Teaching experimental design Improvement

Preliminary Study on Rooting Promotion Activity of 33 Species of Plant Extracts

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Plant Diseases and Pests 2012年第3期3卷 32-34页

作者： Jing WANG Xia LIU Lin LIU Chun XIAO Min YE liming FAN Yougui zha Key Lab of the Ministry of Education for Agro-biodiversity and Disease Control College of Plant Protection Yunnan Agricultural University

[ Objective ] The paper was to study the rooting promotion activity of plant extracts, so as to lay the foundation for development of natural source of roo- fing reagent with high efficiency, safety and environment friendship. [Method] Using mung bean rooting method, the rooting promotion effects of 33 plant extracts on mung bean section were studied. [Result] When the concentration was 1 mg/mL, Eupatorium adenophorum （stem and leaf）, Cryptomeriafortunei （stem and leaf）, Pinus yunnanensis （stem）, Pinus yunnanensis （leaf）, Rhododendron simsii （leaf）, Pinus armandii （leaf）, Litchi chinensis （pericarp）, P/nus armandiifruit （fruit） and Alnus cremastogyne （leaf） showed strong promotion effect on rooting of mung bean sections, and the rooting promotion rate reached over 100% ; the roo- ting promotion effect ofE. adenophorum （stem and leaf） was the strongest, reaching（1068.42 ＋7.87）%, which was extremely higher than the extracts of other plants. [Conclusion] E. adenophorum （stem and leaf）, C. fortunei （stem and leaf）, P. yunnanens/s （stem）, P. yurmanens/s （leaf）, R. simsii （leaf）, P. armandii （leaf）, L. chinensis （pericarp）, P. armandiifruit （fruit） and A. cremastogyne （leaf） all contained substances with st/ong rooting promotion effect, which could be further used for development of natural rooting reagent.

关键词： Botanical pesticide Rooting reagent Biological screening

Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

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National Science Review 2020年第1期7卷 84-91页

作者： Cong Liu Feng An Paria S.M.Gharavi Qinwen Lu Junkun zha.Chao Chen liming Wang Xiaozhi zha. Zedong Xu Yuan zha.g Ke Qu Junxiang Yao Yun Ou Zhiming zha. Xiangli Zhong Dongwen zha.g Nagarajan Valanoor Lang Chen Tao Zhu Deyang Chen Xiaofang zha. Peng Gao Tingting Jia Shuhong Xie Gaokuo Zhong Jiangyu Li Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences School of Materials Science and Engineering Xiangtan University School of Materials Science and Engineering University of New South Wales Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics University of Science and Technology of China Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced Optoelectronics South China Normal University Dongguan Neutron Science Center Department of Physics Southern University of Science and Technology International Center for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Department of Physics College of Science National University of Defense Technology Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory Dongguan Neutron Science Center

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic（1-x）BiTi;/;Fe;Mg;/;O;–（x）CaTiO;（BTFM–CTO） solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10;s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition,phase, and structure that can be easily scaled up for industrial applications.

关键词： complex oxide solution method epitaxy multiferroic

基于HOG和SVM的公交乘客人流量统计算法

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仪器仪表学报 2015年第2期36卷 446-452页

作者：徐超高梦珠查宇锋曹利民安徽大学智能与信号处理教育部重点实验室合肥230601 安徽微纳电子器件与集成电路设计省级实验室合肥230601

针对公交乘客人流量统计准确度不高的问题,提出一种基于HOG和SVM的人流量统计算法。首先采用机器学习的方法,提取人头部的HOG特征,将SVM作为学习训练方法,得到关于人头的线性目标分类模型的分类器,成功检测出人头;其次通过数据关联,将Ca... 详细信息

针对公交乘客人流量统计准确度不高的问题,提出一种基于HOG和SVM的人流量统计算法。首先采用机器学习的方法,提取人头部的HOG特征,将SVM作为学习训练方法,得到关于人头的线性目标分类模型的分类器,成功检测出人头;其次通过数据关联,将Camshift算法作为人头目标跟踪算法,并利用tracking-by-detection机制,实现多目标跟踪,稳定地捕获人头目标的运动轨迹;最后对轨迹分析,判断目标是否越过设定的计数线,从而完成对公交乘客人流量的自动计数。实验表明该算法统计准确率有明显提高,且误检率较低,特别是在白天光照条件较好时,能够实现人流量的有效计数。

关键词： HOG SVM 数据关联 Camshift跟踪算法

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棉花机械化自动制钵机的设计

农机化研究 2011年第5期33卷 126-129页

作者：谭利明闸建文山东理工大学农业工程与食品科学学院山东淄博255000

针对现有棉花制钵机普遍存在生产效率低、劳动强度高、不能连续作业等不足和缺陷,在研究了棉花制钵工艺的基础上,研制了一种新型冲压式棉花制钵机。通过大量实验证明:该制钵机能够满足棉花育苗、移栽的工艺要求,同时又大幅度提高了制钵... 详细信息

针对现有棉花制钵机普遍存在生产效率低、劳动强度高、不能连续作业等不足和缺陷,在研究了棉花制钵工艺的基础上,研制了一种新型冲压式棉花制钵机。通过大量实验证明:该制钵机能够满足棉花育苗、移栽的工艺要求,同时又大幅度提高了制钵的机械化,能够一次性自动完成充土—压实-打孔—成钵等多项工序,具有生产效率高、劳动强度低、成钵质量好等特点,是一种较为实用的农业机械。

关键词：棉花制钵机营养钵机械化

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薇甘菊挥发油对5种农作物的化感作用

西北农业学报 2014年第1期23卷 192-196页

作者：施蕊李彪赵黎明查友贵叶敏云南农业大学农业生物多样性与病虫害控制教育部重点实验室昆明650201 云南瑞升烟草技术(集团)有限公司昆明650106 西南林业大学昆明650224

以大豆、绿豆、小麦、苋菜、油菜籽5种种子为受体,探究不同质量浓度的薇甘菊挥发油对种子的化感作用。采用水蒸气蒸馏法提取薇甘菊挥发油,并进行种子萌发试验。结果表明:不同质量浓度的薇甘菊挥发油对5种供试种子的萌发和幼苗生长的影... 详细信息

以大豆、绿豆、小麦、苋菜、油菜籽5种种子为受体,探究不同质量浓度的薇甘菊挥发油对种子的化感作用。采用水蒸气蒸馏法提取薇甘菊挥发油,并进行种子萌发试验。结果表明:不同质量浓度的薇甘菊挥发油对5种供试种子的萌发和幼苗生长的影响总体表现为抑制作用,且质量浓度越高,抑制作用越强;低质量浓度的薇甘菊挥发油能够促进大豆的根长和苗高生长,能够促进绿豆的根长生长;就5种供试作物而言,油菜对薇甘菊挥发油最敏感,其次是苋菜,小麦最不敏感。

关键词：薇甘菊挥发油化感作用