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分光光度法测定铝合金中低含量的铋

河南化工 2020年第11期37卷 56-58页

作者：曾茵刘云贵龙安禄朱绍严龙尚俊贵州省分析测试研究院贵州省检测技术研究应用中心贵州贵阳550014

采用分光光度法建立一种测定铝合金中低含量铋的测定方法,此法测量范围在0.05%~1%,样品经碱溶、酸化后得到澄清溶液,加入硫脲及碘化钾显色,在464 nm波长下用分光光度计测定浓度在0.1~1 mg/mL对应的吸光度,符合朗伯-比尔定律,线性回归方... 详细信息

采用分光光度法建立一种测定铝合金中低含量铋的测定方法,此法测量范围在0.05%~1%,样品经碱溶、酸化后得到澄清溶液,加入硫脲及碘化钾显色,在464 nm波长下用分光光度计测定浓度在0.1~1 mg/mL对应的吸光度,符合朗伯-比尔定律,线性回归方程为y=0.0544x-0.0019,相关系数R2=0.9998,加标回收率在92.8%~104.9%,该方法快速、准确,适用于铝合金中低含量铋的测定。

关键词：铝合金中铋含量碱溶酸化分光光度法

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铝合金中铋含量测定的研究进展

河南化工 2019年第3期36卷 11-13页

作者：刘云贵龙安禄龙尚俊曾茵周元敬贵州省分析测试研究院贵州贵阳550002

含铋铝合金具有较好的加工性能和特殊用途,在航空、船舶、核工业及兵器工业领域都有着广泛的应用,但过量的铋会降低合金的强度。因此,测定和控制铝合金中铋的含量显得极其重要,而且具有一定的难度,目前还没有专门测定铝合金中铋含量的... 详细信息

含铋铝合金具有较好的加工性能和特殊用途,在航空、船舶、核工业及兵器工业领域都有着广泛的应用,但过量的铋会降低合金的强度。因此,测定和控制铝合金中铋的含量显得极其重要,而且具有一定的难度,目前还没有专门测定铝合金中铋含量的国家标准。综述了分光光度法、电感耦合等离子体原子发射光谱法、汞膜电极法等铝合金中铋的主要检测方法,旨在为探寻简单准确测定出铝合金中铋含量的方法提供参考。

关键词：铝合金铋含量测定

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二硼化钛防弹陶瓷的作用机理与烧结工艺进展

中国陶瓷工业 2021年第5期28卷 6-10页

作者：殷姝雅李松李家华刘云贵朱绍严贵州省分析测试研究院贵州贵阳550014 贵州省检测技术研究应用中心贵州贵阳550002

二硼化钛(TiB_(2))防弹陶瓷是20世纪90年代进入研究阶段的新兴工程陶瓷材料,抗爆能力强、装甲崩落少,与碳化硼、碳化硅等形成的复相陶瓷材料成为近年来防弹陶瓷研究的热点。本文总结了TiB_(2)防弹陶瓷的作用机理,列举了部分TiB_(2)复相... 详细信息

二硼化钛(TiB_(2))防弹陶瓷是20世纪90年代进入研究阶段的新兴工程陶瓷材料,抗爆能力强、装甲崩落少,与碳化硼、碳化硅等形成的复相陶瓷材料成为近年来防弹陶瓷研究的热点。本文总结了TiB_(2)防弹陶瓷的作用机理,列举了部分TiB_(2)复相陶瓷的性能指标,综述了TiB_(2)防弹陶瓷的现有烧结工艺,并对微波烧结和闪烧烧结在此方面的生产应用进行了展望。

关键词：二硼化钛防弹陶瓷作用机理烧结工艺

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分光光度法测定肥料中硝酸根

贵州科学 2020年第5期38卷 93-96页

作者：龙尚俊刘云贵龙安禄朱绍严周元敬贵州省检测技术研究应用中心贵州贵阳550014 贵州省分析测试研究院贵州贵阳550014

肥料中含有杂质硝酸根,而硝酸根是铁路运输危险货物之一。用靛蓝二磺酸钠为显色剂,采用分光光度法测定肥料中的硝酸根,探讨不同因素对硝酸根测定的影响,确定最佳分析条件,610 nm波长处,硝酸根质量浓度在0~50μg时与靛蓝二磺酸钠吸光度... 详细信息

肥料中含有杂质硝酸根,而硝酸根是铁路运输危险货物之一。用靛蓝二磺酸钠为显色剂,采用分光光度法测定肥料中的硝酸根,探讨不同因素对硝酸根测定的影响,确定最佳分析条件,610 nm波长处,硝酸根质量浓度在0~50μg时与靛蓝二磺酸钠吸光度呈线性关系,符合朗伯-比尔定律,线性回归方程为y=-0.0054x+0.3806,相关系数R 2=0.9994,加标回收率在95.8%~104%之间,可用于测定肥料中硝酸根含量,方法简便,测定结果准确可靠。

关键词：肥料硝酸根靛蓝二磺酸钠

Effect of single Si_(1−x)C_(x)coating and compound coatings on the thermal conductivity and corrosion resistance of Mg-3Sn alloy

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Journal of Magnesium and Alloys 2015年第1期3卷 10-15页

作者： Chunming Wang Sufen Xiao yungui Chen Xia liu College of Materials Science and Engineering Sichuan UniversityChengdu 610064China

A single Si_(1−x)C_(x)coating and compound coatings were deposited on Mg-3Sn matrix alloy by magnetron sputtering *** coatings included Mg or Mg/AlTi intermediates between Mg-3Sn substrate and Si_(1−x)C_(x)*** thermal conductivity of the Mg-3Sn alloy after coating was enhanced at room *** results showed that the Mg-3Sn alloy coated with Mg/AlTi/Si_(1−x)C_(x)displayed higher thermal conductivity,its thermal conductivity after corrosion was 90.1 W/(m K)and 108.4 W/(m K)at 25℃and 100℃,***,it was revealed that the Mg/Si_(1−x)C_(x)and Mg/AlTi/Si_(1−x)C_(x)compound coatings had nobler Ecorr and much lower i_(corr),higher Rp,compared with the bare Mg-3Sn and Mg-3Sn/Si_(1−x)C_(x)system,and improved the corrosion resistance of the magnesium substrate.

关键词： Si_(1−x)C_(x)coating Compound coatings Thermal conductivity Corrosion resistance

湘西土家族不明原因反复流产患者HLA-DRB1基因多态性研究

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现代中西医结合杂志 2008年第29期17卷 4521-4522,4536页

作者：罗雪梅程秋蓉周昌菊刘云贵杜建林吉首大学医学院湖南吉首416000 吉首大学第一附属医院湖南吉首416000 中南大学湘雅三医院湖南长沙410013

目的探讨HLA-DRB1基因多态性与湘西土家族人群不明原因反复流产的遗传关联性。方法采用聚合酶链反应-序列特异性引物(PCR-SSP)技术,对76例湘西土家族不明原因反复流产患者和82例湘西土家族健康对照者的HLA-DRB1等位基因进行分析。结果... 详细信息

目的探讨HLA-DRB1基因多态性与湘西土家族人群不明原因反复流产的遗传关联性。方法采用聚合酶链反应-序列特异性引物(PCR-SSP)技术,对76例湘西土家族不明原因反复流产患者和82例湘西土家族健康对照者的HLA-DRB1等位基因进行分析。结果与对照组比较,病例组的DRB1*04基因频率增高(37.17%比8.27%,PC<0.01,RR=8.02),而DRB1*12基因频率显著低于对照组(4.72%比28.43%,PC<0.01,RR=0.11)。结论HLA-DRB1*04可能是湘西土家族不明原因反复流产的易感基因,HLA-DRB1*12可能为保护基因。

关键词：流产 HLA-DR 聚合酶链反应序列特异性

AHMT分光光度法测定水性墙面涂料中游离甲醛含量

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贵州科学 2021年第4期39卷 73-76页

作者：张冰梅龙尚俊刘云贵周元敬朱绍严龙安禄贵州省分析测试研究院贵州贵阳550014 贵州省检测技术研究应用中心贵州贵阳550014

AHMT溶液储存于棕色瓶中可稳定保存半年,应用AHMT分光光度法测定水性墙面涂料中的甲醛含量,可有效节约试剂使用成本,甲醛质量在0.1~5μg范围内,线性范围y=0.125x+0.0453,相关系数R 2=0.9993;加标回收率为98.3%~102.7%,RSD为1.4%~6.2%,... 详细信息

AHMT溶液储存于棕色瓶中可稳定保存半年,应用AHMT分光光度法测定水性墙面涂料中的甲醛含量,可有效节约试剂使用成本,甲醛质量在0.1~5μg范围内,线性范围y=0.125x+0.0453,相关系数R 2=0.9993;加标回收率为98.3%~102.7%,RSD为1.4%~6.2%,检出限<5 mg/kg,为检测水性墙面涂料中低含量的甲醛含量提供检测依据,该方法操作简单,具有较高的精密度和准确度。

关键词：水性墙面涂料甲醛含量低含量 AHMT分光光度法

Substantial transition to clean household energy mix in rural China

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National Science Review 2022年第7期9卷 137-151页

作者： Guofeng Shen Rui Xiong Yanlin Tian Zhihan Luo Bahabaike Jiangtulu Wenjun Meng Wei Du Jing Meng Yuanchen Chen Bing Xue Bin Wang Yonghong Duan Jia Duo Fenggui Fan Lei Huang Tianzhen Ju Fenggui liu Shunxin Li Xianli liu yungui Li Mu Wang Ying Nan Bo Pan Yanfang Pan Lizhi Wang Eddy Zeng Chao Zhan Yilin Chen Huizhong Shen Hefa Cheng Shu Tao College of Urban and Environmental Sciences Peking University Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)Nanjing University of Information Science and Technology Institute of Reproductive and Child Health Peking University Laboratory of Geographic Information Science School of Geographic Sciences East China Normal University The Bartlett School of Sustainable Construction University College London College of Environment Zhejiang University of Technology Institute of Applied Ecology Chinese Academy of Sciences Department of Epidemiology and Biostatistics School of Public Health Peking University College of Resources and Environment Shanxi Agricultural University Xinjiang Key Laboratory of Environmental Pollution and Bioremediation Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences National Engineering Technology Research Center for Desert-Oasis Ecological Construction Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences School of Geography and Tourism Anhui University School of Environment Nanjing University College of Geography and Environmental Science Northwest Normal University College of Geographical Science Qinghai Normal University Academy of Plateau Science and Sustainability College of Chemistry Chemical Engineering and Environment Minnan Normal University School of Environmental Science and Engineering Hubei Polytechnic University Department of Environmental Engineering Southwest University of Science and Technology College of Food Science Tibet Agricultural and Animal Husbandry University College of Geography and Ocean Sciences Yanbian University Faculty of Environmental Science and Engineering Kunming University of Science and Technology College of Geography and Environmental Science Henan University College of Ecology and Environment Hainan University School of Environment Ji

The household energy mix has significant impacts on human health and climate,as it contributes greatly to many health-and climate-relevant air *** to the well-established urban energy statistical system,the rural hous ehold energy statistical system is incomplete and is often associated with high *** a nationwide investigation,this study reve aled high contributions to energy supply from coal and biomass fuels in the rural household energy sector,while electricity comprised ～20%.Stacking(the use of multiple sources of energy) is significant,and the average number of energy types was 2.8 per *** to 2012,the consumption of biomass and coals in 2017 decreased by 45% and 12%,respectively,while the gas consumption amount increased by 204%.Increased gas and decreased coal consumptions were mainly in cooking,while decreased biomass was in both cooking(41%) and heating(59%).The time-sharing fraction of electricity and gases(E&G) for daily cooking grew,reaching 69% in 2017,but for space heating,traditional solid fuels were still dominant,with the national average shared fraction of E&G being only 20%.The non-uniform spatial distribution and the non-linear increase in the fraction of E&G indicated challenges to achieving universal access to modern cooking energy by 2030,particularly in less-developed rural and mountainous *** some non-typical heating zones,the increased share of E&G for heating was significant and largely driven by income growth,but in typical heating zones,the time-sharing fraction was <5 % and was not significantly increased,except in areas with policy *** intervention policy not only led to dramatic increases in the clean energy fraction for heating but also accelerated the clean cooking *** income,higher education,younger age,less energy/stove stacking and smaller family size positively impacted the clean energy transition.

关键词： household energy mix energy transition clean heating modern energy sustainable development

角膜接触镜经营企业质量管理现况及监管对策思考

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中国医疗器械杂志 2014年第3期38卷 213-215页

作者：刘云贵姚璎上官士浩顾群高吾名陈尧水上海市食品药品监督管理局徐汇分局上海市200030

目的通过系统调查,了解角膜接触镜经营企业质量管理现况,探索进一步有效监管的方向。方法对上海市徐汇区62家角膜接触镜经营企业质量管理指标进行系统调查,并对不同经营模式企业进行数据对比与统计分析。结果角膜接触镜批发企业、零售... 详细信息

目的通过系统调查,了解角膜接触镜经营企业质量管理现况,探索进一步有效监管的方向。方法对上海市徐汇区62家角膜接触镜经营企业质量管理指标进行系统调查,并对不同经营模式企业进行数据对比与统计分析。结果角膜接触镜批发企业、零售连锁企业各项质量管理指标明显好于非连锁角膜接触镜零售企业。结论提高许可门槛,鼓励角膜接触镜零售连锁经营模式,加强对角膜接触镜经营企业的监管,重点是加强对单体零售企业的监管。

关键词：角膜接触镜经营企业质量管理监管对策