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黔南州冰雹天气环流特征分析

山地气象学报 2024年第3期48卷 80-85页

作者：黄麟媛罗喜平罗雄赵杰莫乙冬贵州省黔南布依族苗族自治州气象局贵州都匀558000 贵州省气候中心贵州贵阳550002 贵州省气象台贵州贵阳550002

【目的】为了建立黔南地区冰雹发生前天气背景流型配置和T-logP图形态本地化天气概念模型。【方法】选取2006—2022年黔南30次降雹事件,运用天气学分析方法对常规高空、地面气象资料进行研究分析。【结果】以地面流型为主、高低空流型为... 详细信息

【目的】为了建立黔南地区冰雹发生前天气背景流型配置和T-logP图形态本地化天气概念模型。【方法】选取2006—2022年黔南30次降雹事件,运用天气学分析方法对常规高空、地面气象资料进行研究分析。【结果】以地面流型为主、高低空流型为辅,黔南地区冰雹事件发生前天气类型可分为热低压辐合型、高架雷暴型和冷锋低槽(切变)型3类。【结论】3类天气分型特征如下:(1)热低压辐合型降雹高频次区域为黔南中北部,高架雷暴型降雹高频次区域为黔南中部,冷锋低槽(切变)型降雹高频次区域为黔南中南部;(2)T-logP图形态共有4种,分别为漏斗无梭形、无漏斗梭形、小漏斗梭形、大漏斗梭形,热低压辐合型以大漏斗梭形为主,高架雷暴型以漏斗无梭形为主,冷锋低槽(切变)型以无漏斗梭形为主。

关键词：冰雹天气环流 T-logP图

Growth inhibitory effects of THY1 gene on epithelial ovarian cancer SKOV3 cells

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The Chinese-German Journal of Clinical Oncology 2009年第8期8卷 476-480页

作者： Liqin Zeng Zhilan Peng xiping luo Department of Gynecology Maternal and Children＇s Hospital of Guangdong Province Guangzhou 510010 China Department of Gynecology West China Second Hospital Sichuan University Chengdu 610041 China

Objective： The aim of this study was to construct THY1 eukaryotic expression plasmid ,and study its effects on ovarian cancer SKOV3 cells. Methods： The gene fragment coding for THY1 was obtained from human normal ovarian tissue using RT-PCR, and inserted into the eukaryotic expression plasmid pcDNA3.1 （＋） to construct the recombinant plas- mid pcDNA3.1（＋）-THY1, which was transfected into SKOV3 cells. The experimental cells were classified into three groups： SKOV3-THY1, SKOV3-Null and SKOV3. The expression of gene was measured using RT-PCR and Western blotting. The percentage of apoptotic cells and cell cycle analysis and cell proliferation were assessed by flow cytometry and MTT assay. Both SKOV3-THY1 and SKOV3-null cells were inoculated subcutaneously into nude mice to determine in vivo tumorigenicity. Results： The gene fragment of THY1 was correctly inserted into the eukaryotic expression plasmid pcDNA3.1 （＋） and veri- fied by PCR, restriction endonucleases digestion and DNA sequencing and the plasmid of pcDNA3.1（＋）-THY1 （THY1 gene overexpression） has been stably transfected into SKOV3 cells. The analysis of flow cytometry indicated that the pcDNA3.1（＋）- THY1 transfected ceils in G1 phase were significantly elevated, but in S phase were decreased. The growth of transfected cells was suppressed, and more apoptosis cells were identified in pcDNA3.1（＋）-THY1 transfectants compared with vector vehicle transfectants. The tumor suppressing activity of THY1 in SKOV3 cells was associated with inhibition of SKOV3 cellular proliferation, in vivo tumorigenesis in nude mice. Conclusion： THY1 transfection can inhibit the growth of SKOV-3 cells in vitro and in vivo. THY1 gene may play an important role in generation and development of ovarian cancers.

关键词： ovarian neoplasms geoe THY1 eukaryotic expression plasmid transfection

木质素磺酸钠吸附材料的制备及对刚果红的吸附性能

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浙江农林大学学报 2024年第4期41卷 870-878页

作者：李钧洋霍丽竹龚祥许浩王宇轩郭超飞杨雪娟罗锡平浙江农林大学化学与材料工程学院浙江杭州311300 浙江农林大学浙江省林业生物质化学利用重点实验室浙江杭州311300

【目的】以木质素磺酸钠(SLS)为原料,制备胺化改性的木质素磺酸钠以及共价有机框架聚合物/胺化木质素磺酸钠复合材料,考察它们作为吸附材料对刚果红的吸附性能。【方法】木质素磺酸钠与甲醛、二乙烯三胺经曼尼希反应制得胺化木质素磺酸... 详细信息

【目的】以木质素磺酸钠(SLS)为原料,制备胺化改性的木质素磺酸钠以及共价有机框架聚合物/胺化木质素磺酸钠复合材料,考察它们作为吸附材料对刚果红的吸附性能。【方法】木质素磺酸钠与甲醛、二乙烯三胺经曼尼希反应制得胺化木质素磺酸钠(ASLS),采用红外光谱(FTIR)和扫描电镜(SEM)对吸附剂的表面官能团和形貌进行了表征。考察刚果红起始质量浓度、ASLS用量、溶液pH、吸附时间等对材料吸附效果的影响;探究ASLS的吸附动力学和循环再生性能。制备富含醌共价有机框架聚合物(AQ-COF),对比ASLS、AQ-COF、AQ-COF/ASLS材料对刚果红的吸附效果。【结果】FTIR和SEM表征结果显示:木质素磺酸钠成功胺化,ASLS与AQ-COF复合后自组装成棒状纳米结构。ASLS吸附结果表明:刚果红起始质量浓度为200 mg·L^(-1),ASLS用量为70 mg,pH为1~5时,吸附率达95%以上,并在80 min内达到吸附平衡,吸附过程符合准二级吸附动力学模型和Langmuir等温吸附模型,吸附过程主要为化学吸附。30 mg ASLS中添加少量AQ-COF(2 mg),复合吸附剂吸附率可达80%以上。【结论】胺化改性木质素磺酸钠对刚果红有良好的吸附效果,且具有优秀的再生性能,可以作为刚果红的优良吸附剂;共价有机框架聚合物AQ-COF与ASLS复合制备的复合吸附剂可以提升ASLS对刚果红的吸附能力,表明共价有机框架聚合物在刚果红吸附领域有良好的应用前景。

关键词：木质素磺酸钠胺化改性有机框架聚合物刚果红吸附

云贵高原东部锋面雾的特征及气象影响因子分析

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气象与环境科学 2024年第2期47卷 36-45页

作者：李力杨静许可周明飞罗喜平贵州省气象台贵阳550002 贵州省山地气候与资源重点试验室贵阳550002 贵州省气象服务中心贵阳550002 贵州省气候中心贵阳550002

利用19842013年贵州省84个国家级观测站地面气象观测资料,分析锋面雾的时空分布特征及其与气象影响因子的关系。结果表明:(1)锋面雾呈“西多东少”的分布特征,与云贵静止锋的位置及强弱、贵州西高东低的地势有关,73%的锋面雾出现在海拔... 详细信息

利用19842013年贵州省84个国家级观测站地面气象观测资料,分析锋面雾的时空分布特征及其与气象影响因子的关系。结果表明:(1)锋面雾呈“西多东少”的分布特征,与云贵静止锋的位置及强弱、贵州西高东低的地势有关,73%的锋面雾出现在海拔高度为8001500 m的地区。(2)近30年贵州锋面雾日的年际变化呈缓慢下降趋势,每10年下降0.39天,贵州中西部地区锋面雾日呈减少趋势,这与气温升高、湿度降低有关;锋面雾主要出现在秋末至初春,以冬季为最多,日变化不显著,但夜间到早晨时段发生的频率最高。(3)在云贵静止锋背景下,气温2~6℃,气温日较差2~4℃,24 h变压和变温分别为-2~2 hPa和-2~2℃时,锋面雾发生的频率最大,表明较稳定的气压和温度对锋面雾形成有重要意义,强烈的升温和降温均不利于锋面雾的形成。锋面雾发生时地面风速小于等于4 m/s,风向以静风和偏东、偏北风为主,其次是偏南风,常伴随微量降水存在。

关键词：锋面雾时空分布气象影响因子

树突状细胞在滤泡辅助性T细胞分化过程中的作用研究进展

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蛇志 2024年第3期36卷 370-373,385页

作者：骆曦坪卢蕊欣于思睿黄国晟曾文广西医科大学第一附属医院呼吸与危重症学科广西南宁530021

滤泡辅助性T(TFH)细胞是CD4+T细胞的一个特殊亚群,在促进和调节体液反应有着重要的作用。TFH细胞分化需要树突状细胞(DC)才能顺利完成,但目前关于DC如何诱导不同的TFH分化过程以及在诱导分化中的特殊作用仍未充分明确。因此,为加强对DC-... 详细信息

滤泡辅助性T(TFH)细胞是CD4+T细胞的一个特殊亚群,在促进和调节体液反应有着重要的作用。TFH细胞分化需要树突状细胞(DC)才能顺利完成,但目前关于DC如何诱导不同的TFH分化过程以及在诱导分化中的特殊作用仍未充分明确。因此,为加强对DC-TFH细胞轴的认识,本文就DC的TFH细胞不同亚群分化过程中的作用进行综述,指出TFH细胞分化需要DC的持续抗原提呈,同时还受CD28和CD40L下游的OX40信号调控。

关键词：树突状细胞滤泡辅助性T细胞 B细胞

Dithienylethene metallodendrimers with high photochromic efficiency

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Chinese Chemical Letters 2022年第3期33卷 1613-1618页

作者： Yuxuan Wang Qifeng Zhou Xiaoxiao He Ying Zhang Hongwei Tan Jianhua Xu Cuihong Wang Wei Wang xiping luo Jinquan Chen Lin Xu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass Department of ChemistryZhejiang A&F UniversityHangzhou 311300China College of Chemistry Beijing Normal UniversityBeijing 100050China

It has been challenging to achieve multi-photochromic systems without affecting the individual photoswitching properties of the constituent units. Herein, we present the design and synthesis of a new family of platinum-acetylide dendrimers containing up to twenty-one photochromic dithienylethene(DTE)units that exhibit both high photochromic efficiency and individual switching properties. Upon irradiation with ultraviolet(UV) and visible(vis) light, the resultant metallodendrimers display high conversion yield and good fatigue resistance. More interestingly, cyclization-cycloreversion kinetics revealed that the photochromic property of each DTE unit in these metallodendrimers is unaffected by its neighbor and the full ring-closure of up to twenty-one DTE units in one single dendrimer has been achieved.

关键词： Photochromic compounds Stimulus response Dendrimers Platinum-acetylide complexes Dithienylethene

“一体双翼”嵌入式人才培养模式创新——浙江农林大学应用化学专业建设实践

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大学化学 2024年第3期39卷 205-209页

作者：罗锡平王星杨胜祥郭建忠王宇轩杨雪娟浙江农林大学化学与材料工程学院杭州311300

浙江农林大学应用化学专业是首批浙江省一流专业建设点,也是第三批国家级一流本科专业建设点。本文分析了传统专业人才培养中存在的问题,提出了共建人才培养方案、教师队伍资源库、实践教学基地、课程教材建设、教学方法创新等优质教学... 详细信息

浙江农林大学应用化学专业是首批浙江省一流专业建设点,也是第三批国家级一流本科专业建设点。本文分析了传统专业人才培养中存在的问题,提出了共建人才培养方案、教师队伍资源库、实践教学基地、课程教材建设、教学方法创新等优质教学资源,构建“一体双翼”嵌入式人才培养新模式,以范例介绍模式内容及保障措施,分析了模式成效。

关键词：一流专业建设教学改革产教融合

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High-performance wearable bimetallic nanowire-assisted composite foams for efficient electromagnetic interference shielding,infrared stealth,and piezoresistive sensing

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Nano Research 2024年第7期17卷 6757-6765页

作者： Tianyi Hang Lijie Zhou Chenhui Xu Yiming Chen Jiahui Shen Jiajia Zheng Pingan Yang xiping Li Heng luo Guoxiu Tong Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province College of EngineeringZhejiang Normal UniversityJinhua 321004China School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

With the accelerated development of modern detection and communication technology,the multifunctional wearable materials with excellent electromagnetic interference(EMI)shielding,infrared stealth,and human monitoring for improving military combat capability have received extensive *** this work,the lightweight melamine foam(MF)@silver nanowires(AgNWs)-iron nanowires(FeNWs)(AgFe-MF)was fabricated by a vacuum-assisted dip-coating *** to the porous structure and synergistic electrical and magnetic losses,this lightweight(0.115 g/cm^(3))composite foam with an ultra-low filler content(0.62 vol.%)exhibited an ideal EMI shielding efficiency of 38.4 *** the other hand,the AgFe-MF realized a powerful multifunctional *** surface saturation temperature of the AgFe-MF reached 94.2℃under a low applied voltage of 1.8 V and remained extremely fast heating and cooling response and terrific working stability,resulting in excellent infrared stealth and camouflage ***,taking virtues of the elastic porous conductive architecture,the AgFe-MF was utilized as a piezoresistive sensor exhibiting board compressive interval of 0–1.62 kPa(50%strain)with a good sensitivity of 0.57 kPa^(−1).This work will provide new ideas and insights for developing multifunctional wearable devices in the fields of EMI shielding,thermal management,and piezoresistive sensing.

关键词： metal nanowires porous foams electromagnetic interference shielding infrared stealth wearable sensors

Detection and analysis of landslide geomorphology based on UAV vertical photogrammetry

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Journal of Mountain Science 2024年第4期21卷 1190-1214页

作者： BI Rui GAN Shu YUAN xiping LI Kun LI Raobo luo Weidong CHEN Cheng GAO Sha HU Lin ZHU Zhifu School of Land and Resources Engineering Kunming University of Science and TechnologyKunming 650093China Plication Engineering Research Center of Spatial Information Surveying and Mapping Technology in Plateau and Mountainous Areas Set by Universities in Yunnan Province Kunming 650093China West Yunnan University of Applied Sciences Key Laboratory of Mountain Real Scene Point Cloud Data Processing and Application for Universities in Yunnan ProvinceDali 671006China

High-resolution landslide images are required for detailed geomorphological analysis in complex topographic environment with steep and vertical landslide *** study proposed a vertical route planning method for unmanned aerial vehicles(UAVs),which could achieve rapid image collection based on strictly calculated route *** effectiveness of this method was verified using a DJI Mavic 2 Pro,obtaining high-resolution landslide images within the Dongchuan debris flow gully,in the Xiaojiang River Basin,Dongchuan District,Yunnan,China.A three-dimensional(3D)model was constructed by the structure-from-motion and multi-view stereo(SfM-MVS).Micro-geomorphic features were analyzed through visual interpretation,geographic information system(GIS),spatial analysis,and mathematical statistics *** results demonstrated that the proposed method could obtain comprehensive vertical information on landslides while improving measurement *** 3D model was constructed using the vertically oriented flight route to achieve centimeter-level accuracy(horizontal accuracy better than 6 cm,elevation accuracy better than 3 cm,and relative accuracy better than 3.5 cm).The UAV technology could further help understand the micro internal spatial and structural characteristics of landslides,facilitating intuitive acquisition of surface *** slope of landslide clusters ranged from 36°to 72°,with the majority of the slope facing east and *** elevation levels were relatively consistent while middle to lower elevation levels gradually decreased from left to right with significant variations in lower elevation *** the rainy season,surface runoff was abundant,and steep topography exacerbated changes in surface *** route method is suitable for unmanned aerial vehicle(UAV)landslide surveys in complex mountainous *** geomorphological analysis methods used will provide references for identifying and describing topographic

关键词： UAV Landslide Vertical route SfM-MVS Topographic features