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Ballistic deficit compensation method for a large-volume HPGe detector at high count rates

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Nuclear Science and Techniques 2016年第3期27卷 123-131页

作者： Chuan-Yun Xiong Ming-Zhe Liu Zhuo zuo xian-Guo Tuo State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China

A large-volume HPGe detector normally has a severe ballistic deficit due to its long rise time of the output *** the trapezoidal shaping algorithm adopted as a remedy to deal with the signals,the algorithm cannot fully eliminate the ballistic deficit in the case of a high counting *** resolve the problem,we propose a ballistic deficit compensation method that is based on the measurement of rise time of the signals before *** find that the ballistic deficit after trapezoidal shaping has little relation to the time constant,but shows a quadratic relationship with the rise time and has a negative correlation with the shaping *** the case of high count rates,the high resolution is handled by fitting the curve to the rise time and the amplitude deficit of the signal after shaping and by compensating for the signal amplitude after trapezoidal *** indicate that when the count rate is about 100 kcps,the resolution of Co-60 improves from traditional 2.32 up to 1.91 keV,thus reaching a higher level.

关键词：高计数率补偿方法 HPGe探测器亏损弹道大体积输出信号上升时间

PM_(2.5)-bound polyhalogenated carbazoles(PHCZs)in urban Beijing,China:Occurrence and the source implication

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Journal of Environmental Sciences 2023年第9期131卷 59-67页

作者： Peijie zuo Chu Wang Zengwei Li Dawei Lu Hao xian Huili Lu Yin Dong Ruiqiang yang Yingming Li Zhiguo Pei Qinghua Zhang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China The People’s Hospital of Yuhuan Yuhuan 317600China School of Environment Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Polyhalogenated carbazoles(PHCZs)are recently raising much attention due to their toxicity and ubiquitous environmental ***,little knowledge is known about their ambient occurrences and the potential *** this study,we developed an analytical method based on GC-MS/MS to simultaneously determine 11 PHCZs in PM_(2.5) from urban Beijing,*** optimized method provided low method limit of quantifications(MLOQs,1.45–7.39 fg/m^(3))and satisfied recoveries(73.4%–109.5%).This method was applied to analyze the PHCZs in the outdoor PM_(2.5)(n=46)and fly ash(n=6)collected from 3 kinds of surrounding incinerator plants(steel plant,medical waste incinerator and domestic waste incinerator).The levels of Σ_(11)PHCZs in PM_(2.5) ranged from 0.117 to 5.54 pg/m^(3)(median 1.18 pg/m^(3)).3-chloro-9H-carbazole(3-CCZ),3-bromo-9H-carbazole(3-BCZ),and 3,6-dichloro-9Hcarbazole(36-CCZ)were the dominant compounds,accounting for 93%.3-CCZ and 3-BCZ were significantly higher in winter due to the high PM_(2.5) concentration,while 36-CCZ was higher in spring,which may be related to the resuspending of surface ***,the levels of11PHCZs in fly ash ranged from 338 to 6101 pg/g.3-CCZ,3-BCZ and 36-CCZ accounted for 86.0%.The congener profiles of PHCZs between fly ash and PM_(2.5) were highly similar,indicating that combustion process could be an important source of ambient *** the best of our knowledge,this is the first research providing the occurrences of PHCZs in outdoor PM_(2.5).

关键词： Polyhalogenated carbazoles PM_(2.5) GC-MS/MS Combustion source

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产教融合背景下校企合作育人模式研究

创新创业理论研究与实践 2024年第16期7卷 193-195页

作者：周献梁烨左可李谟发湖南电气职业技术学院电梯工程学院湖南湘潭411101

产教融合和校企合作是深化现代职业教育体系改革的重要举措,是促进高质量技术技能人才培养的重要途径,也是加快产业转型升级和经济结构优化调整的重要手段。但目前在校企合作育人方面仍存在育人合力不足、合作内容流于形式等问题,该文... 详细信息

产教融合和校企合作是深化现代职业教育体系改革的重要举措,是促进高质量技术技能人才培养的重要途径,也是加快产业转型升级和经济结构优化调整的重要手段。但目前在校企合作育人方面仍存在育人合力不足、合作内容流于形式等问题,该文针对以上问题,提出了产教融合背景下校企合作育人模式的构建策略,以期为培养企业急需的高素质技术技能型人才提供一定的借鉴。

关键词：校企合作产教融合育人模式多元协同双主体产业学院

Down-Regulation of OsGRF1 Gene in Rice rhdl Mutant Results in Reduced Heading Date

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Journal of Integrative Plant Biology 2005年第6期47卷 745-752页

作者： An-DingLUO LuoLIU zuo-ShunTANG xian-QuanBAI Shou-YunCAO Cheng-CaiCHU InstituteofGeneticsandDevelopmentalBiology theChineseAcademyofSciencesBeijing100101China InstituteofGeneticsandDevelopmentalBiology theChineseAcademyofSciencesBeijing100101China／／GraduateSchooloftheChineseAcademyofSciencesBeijing100039China

Abstract: A rice mutant with reduced heading date (designated rhd1) found in a transgenic line of cultivar Teqing 2 (Oryza sativa L. ssp. indica) was used to identify the genes related to rice heading and thereby to study its molecular mechanism. Genetic analysis showed that rhd1 was a dominant mutation and did not result from T-DNA insertion. By using the differential display polymerase chain reaction (DD-PCR) technique, differential gene expression between rhd1 and Teqing 2 was compared and a rhd1-down-regulated c DNA fragment was identified. Sequence analysis showed that this fragment shared 99% similarity to the OsGRF1 (O. sativa growth-regulating factor 1) gene. The OsGRF1 gene encodes a putative transcription factor, which contains two conserved regions: the QLQ (Gln, Leu, Gln) and WRC (Trp, Arg, Cys) domains. Southern analysis indicates that OsGRF1 may be encoded by single copy gene in the rice genome. RNA interference results revealed that transgenic lines with reduced OsGRF1 transcript displayed delayed growth and development, developed small leaves, and had delayed heading. The extent of the phenotypes developed was well-correlated with the OsGRF1 gene transcript. Our results clearly demonstrate that the OsGRF1 gene is not only involved in regulating growth at the juvenile stage, but that it may also be involved in the regulation of heading in rice.

关键词： differential display polymerase chain reaction (DD-PCR) Oryza sativa growth-regulating factor 1 (OsGRF1) reduced heading date rice RNAi

Kinetics of the electrochemical process of galena electrodes in the diethyldithiocarbamate solution

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International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 669-674页

作者： Li-li Cheng Ti-chang Sun xian-ping Luo Dian-zuo Wang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China School of Resources and Environmental Engineering Jiangxi University of Science and Technology Ganzhou 341000 China Chinese Academy of Engineering Beijing 100038 China

The electrochemical process of galena in a pH 12.8 buffer solution was investigated using chronoamperometry and chronopotentiometry. To establish kinetic parameters on the surface of galena in the diethyldithiocarbamate solution, the exchange current density and the dependence of current density on reaction time were determined. Experimental results demonstrate that the exchange current density of galena is 1.585× 10^-2A/m2 in the diethyldithiocarbamate-free solution. In the diethyldithiocarbamate solution, the thickness of lead diethyldi- thiocarbamate adsorbed on the surface of galena is 3.28 molecular layers, the diffusion coefficient of diethyldithiocarbamate on the surface of galena electrodes is 1.13 × 10^-10 m2/s, and the exchange current density of galena is 0.45 A/m2. Lead diethyldithiocarbamate on the surface of galena is firmly adsorbed.

关键词： galena electrochemistry flotation kinetics

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添加板栗壳色素对纤维素液态地膜性能的影响

塑料科技 2024年第2期52卷 78-83页

作者：孙左玲姚先富何照云周志超姚增玉西南林业大学西南山地森林资源保育与利用教育部重点实验室云南昆明650224 西南林业大学西南地区生物多样保育国家林业与草原局重点实验室云南昆明650224

光老化影响可降解液态地膜的性能和使用寿命。黑色素是生物进化留下的高效光保护剂。文章将黑色素用于液态地膜,探讨板栗壳色素对羧甲基纤维素液态地膜性能的影响。结果表明:板栗壳色素的添加显著提高了地膜的拉伸强度,降低了地膜的断... 详细信息

光老化影响可降解液态地膜的性能和使用寿命。黑色素是生物进化留下的高效光保护剂。文章将黑色素用于液态地膜,探讨板栗壳色素对羧甲基纤维素液态地膜性能的影响。结果表明:板栗壳色素的添加显著提高了地膜的拉伸强度,降低了地膜的断裂伸长率,使膜变得疏松,孔隙增加,水蒸气透过率增大。板栗壳色素的添加还显著提高了地膜的抗氧化能力和抗紫外老化能力。板栗壳色素与羧甲基纤维素的质量比为5∶3时,液态地膜可有效减缓土壤水分蒸发,具有良好的土壤保水性能。板栗壳色素可作为一种廉价环保的可降解液态地膜光保护剂。

关键词：板栗壳色素羧甲基纤维素液态地膜抗老化紫外光保护剂

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硫酸特布他林雾化液刺激性与过敏性评价

海峡药学 2024年第5期36卷 1-4页

作者：马晓阳杨娴左亚茹侯海婷赵方红石家庄四药有限公司研发中心河北石家庄050000 化学药品无菌制剂产业技术研究院河北石家庄050000 河北省大容量注射剂工程技术研究中心河北石家庄050000 石家庄四药有限公司博士后科研工作站河北石家庄050000

目的研究硫酸特布他林雾化液对日本大耳兔呼吸系统的刺激性以及是否会引起豚鼠全身主动过敏。方法呼吸系统刺激性试验:动物分组后连续7天雾化吸入硫酸特布他林,1日4次,单次给药剂量为5 mg/只。给药前后进行笼旁观察,末次给药后24 h解剖... 详细信息

目的研究硫酸特布他林雾化液对日本大耳兔呼吸系统的刺激性以及是否会引起豚鼠全身主动过敏。方法呼吸系统刺激性试验:动物分组后连续7天雾化吸入硫酸特布他林,1日4次,单次给药剂量为5 mg/只。给药前后进行笼旁观察,末次给药后24 h解剖取材,检查主要脏器病变。全身主动过敏试验:动物分组后雾化吸入不同剂量的硫酸特布他林,隔日致敏给药1次,共致敏给药3次,末次致敏后第14天和第21天分别每组取3只动物致敏剂量的2倍进行雾化给药激发,激发后观察有无过敏反应出现。结果兔吸入硫酸特布他林雾化液,给药结束有一定的刺激作用,恢复期结束,未见药物延迟或蓄积作用。豚鼠吸入硫酸特布他林雾化液未发生主动全身过敏反应,结果为阴性。结论本研究初步显示了硫酸特布他林雾化液的使用安全性。

关键词：硫酸特布他林雾化液刺激性试验全身主动过敏试验

Primary nonkeratinizing squamous cell carcinoma of the scapular bone:A case report

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World Journal of Clinical Cases 2021年第4期9卷 976-982页

作者： yang Li Jian-Lin zuo Jin-Shuo Tang xian-Yue Shen Sheng-Hao Xu Jian-Lin Xiao Department of Orthopedics China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina Department of Orthopedics The Second Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina

BACKGROUND Squamous cell carcinoma(SCC)of bone is usually caused by metastasis from the lungs,bladder,or other *** SCC of bone most frequently involves the skull bones,and primary involvement of other sites in the skeletal system is extremely *** date,only three such cases have been reported,which makes the diagnosis,treatment,and prognosis of this disease a *** SUMMARY A 76-year-old Chinese man presented to our hospital with nonspecific pain and limited mobility in the right shoulder for 4 *** underwent three-dimensional computed tomography reconstruction and magnetic resonance imaging of the right shoulder,which revealed an osteolytic destructive lesion in the right scapula with invasion into the surrounding muscles and soft ***-guided core needle biopsy detected a malignant tumor,and immunohistochemical analysis revealed a poorly differentiated *** excision of the right scapular bone was performed,and pathological examination of the surgical specimen confirmed the *** the last follow-up examination within 2 years,the patient was doing well with the pain significantly relieved in the right *** Primary SCC of bone is extremely rare at sites other than the *** must exhaust all available means for the diagnosis of primary SCC of the bone,so greater attention can be paid to its timely and effective *** and adequate follow-up is essential to help rule out metastasis and judge the prognosis.

关键词： Primary squamous cell carcinoma Keratin pearls Scapular bone Diagnosis Immunohistochemistry Case report

Silver Chloride Loaded Mesoporous Silica Particles and Their Application in the Antibacterial Coatings on Denture Base

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Chemical Research in Chinese Universities 2013年第6期29卷 1214-1218页

作者： LI xian-liang zuo Wei-wen LUO Meng SHI zuo-sen CUI Zhan-chen ZHU Song State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University Changchun 130012 P.R.China Hospital of Stomatology Jilin University Changchun 130021 P.R.China

Thiol-functionalized MCM-41 type mesoporous silica particles（MSPs） were prepared and loaded with silver chloride to act as antibacterial agents. The antibacterial activity of the silver chloride loaded MSPs（AgCI-MSPs） was evaluated by the minimum bactericidal concentration（MBC） against Candida albieans（ATCC 10231）. The AgC1-MSPs with the highest antibacterial activity were then dispersed in hybrid coatings with different mass ratios to fabricate antibacterial coatings. The antibacterial activity of the coatings was tested against Candida albicans{ATCC 10231） and Streptococcus mutans（ATCC 25175）. The resulting antibacterial coatings exhibited high antibacterial activity, good adhesion to the substrate and high hardness.

关键词： Mesoporous silica Silver chloride antibacterial Coating