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Ce-TiO_2光催化涂料降解甲醛溶液的性能研究及预测模型

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稀土 2014年第4期35卷 18-24页

作者：张浩黄凯黄新杰安徽工业大学建筑工程学院安徽马鞍山243032 中国十七冶集团工程设计公司安徽马鞍山243000

通过自制Ce-TiO2光催化涂料,利用X射线衍射、激光粒度分析和扫描电镜表征Ce-TiO2光催化颗粒的微晶尺寸和晶体结构,进行了光催化涂料耐水性实验和光催化涂料降解甲醛实验,创建了BP模型函数,建立了Ce-TiO2光催化涂料降解甲醛溶液的预测模... 详细信息

通过自制Ce-TiO2光催化涂料,利用X射线衍射、激光粒度分析和扫描电镜表征Ce-TiO2光催化颗粒的微晶尺寸和晶体结构,进行了光催化涂料耐水性实验和光催化涂料降解甲醛实验,创建了BP模型函数,建立了Ce-TiO2光催化涂料降解甲醛溶液的预测模型。结果表明,采用彻底除去负离子和温和的热处理方式能显著降低Ce-TiO2颗粒团聚,Ce-TiO2一次颗粒平均粒度在0~1μm范围内,并且呈现正态分布。Ce-TiO2光催化涂料的耐水性能和光催化性能优良,经过1020 min后,降解甲醛溶液效率高达80.7%。Ce-TiO2光催化涂料的预测模型的预测值和实测浓度吻合较好,平均绝对误差为-0.00028μg/mL,平均相对误差为-0.202%。

关键词：改性TiO2 光催化涂料甲醛预测

Design of an ultrasonic motor with multi-vibrators

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第9期17卷 724-732页

作者： Chong LI Cun-yue LU Yi-xin MA Shi-yang LI Wei-qing huang Department of Instrument Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Precision Driving Lab Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

This paper presents and verifies a new idea for constructing an ultrasonic motor （USM）. The stator contains several vibrators fabricated by bonding piezoelectric ceramics （PZTs） to a metal base. When two alternating current （AC） voltages with a 90° phase difference are applied to the PZTs, longitudinal and bending modes are excited in the vibrator. The bending vibrations of the vibrators are stacked to form the torsional vibration of the stator, ultimately generating longitudinal-torsional composite vibration. Both vibrators and the stator are excited to the resonance state. A standing wave is formed by superposition of longitudinal and torsional modes. The proposed motor is an in-plane vibration motor because the vibrations of the stator are in the circumferential plane. The finite element method （FEM） is used to validate the feasibility of the proposed motor. The fabricated stator contains five vibrators. The tested resonance frequencies of longitudinal and torsional modes are 44.42 kHz and 43.83 kHz, respectively. The stall torque is 0.3 N＇m and no-load speed is 45 r/min. The highest efficiency is 30%. The applied driving voltage is 100 Vo.p （peak voltage） at 43.9 kHz. The designed motor is a parallel-actuated integral motor. It allows the vibrators to operate synchronously, and overcomes asynchronous issues that occur in traditional multi-vibrator motors.

关键词： Ultrasonic motor (USM) Standing wave In-plane vibration Multi-vibrator

克氏原螯虾Dmrt1基因克隆及表达特征分析

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南方农业学报 2024年第4期55卷 1207-1215页

作者：陆专灵纪月鑫戴龙喜王大鹏郭忠宝肖俊梁正黄彬胜杨冬玲韦友传广西水产科学研究院/农业农村部中国(广西)-东盟水产种质资源综合开发与利用重点实验室(部省共建)/广西水产遗传育种与健康养殖重点实验室广西南宁530021 广西大学动物科学技术学院广西南宁530004

【目的】克隆克氏原螯虾(Procambarus clarkii)Dmrt1基因(PcDmrt1),分析其在雌性和雄性克氏原螯虾不同组织中及不同发育时期性腺中的表达特征,为研究克氏原螯虾性别分化与发育提供理论依据。【方法】克隆PcDmrt1基因开放阅读框(ORF),并... 详细信息

【目的】克隆克氏原螯虾(Procambarus clarkii)Dmrt1基因(PcDmrt1),分析其在雌性和雄性克氏原螯虾不同组织中及不同发育时期性腺中的表达特征,为研究克氏原螯虾性别分化与发育提供理论依据。【方法】克隆PcDmrt1基因开放阅读框(ORF),并对其进行生物信息学分析,通过实时荧光定量PCR检测PcDmrt1基因在雌性和雄性克氏原螯虾不同组织及不同发育时期性腺中的表达特征。【结果】PcDmrt1基因ORF长1752 bp,共编码583个氨基酸残基。PcDmrt1蛋白分子量64.9 kD,理论等电点(pI)为9.51,包含2个DM结构域。同源比对分析表明,克氏原螯虾PcDmrt1氨基酸序列与红螯螯虾(Cheraxquadricarinatus)Dmrt氨基酸序列同源性最高,为61.2%。基于Dmrt氨基酸序列相似性构建的系统发育进化树表明,克氏原螯虾与东澳岩龙虾(Sagmariasus verreauxi)、红螯螯虾和美洲螯龙虾(Homarus americanus)亲缘关系较近。PcDmrt1基因在克氏原螯虾性腺、肝胰腺、鳃、脑、眼柄、肌肉和肠道7个组织中均有表达,性腺中相对表达量最高,肝胰腺和眼柄次之,在其他组织中相对表达量较低,在性腺、肝胰腺和眼柄3个组织中,雌性和雄性克氏原螯虾Pcdmrt1基因相对表达量存在显著(P<0.05)或极显著(P<0.01,下同)差异。在克氏原螯虾不同发育时期,PcDmrt1基因相对表达量在出膜后5 d出现高峰,最高表达出现在出膜后40 d,此时雄性幼虾PcDmrt1基因相对表达量极显著高于雌性幼虾。【结论】克氏原螯虾PcDmrt1蛋白含有2个DM结构域,属于典型的Dmrt家族成员,在进化上保守。PcDmrt1基因广泛表达于克氏原螯虾各组织中并在性腺中高表达,基因相对表达量在发育早期呈上升趋势,表明PcDmrt1基因可能在早期参与克氏原螯虾性别分化与组织发育。

关键词：克氏原螯虾 Dmrt1基因组织分布性别调控

Volatile components of Rhizoma Alpiniae Officinarum using three different extraction methods combined with gas chromatography-mass spectrometry

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Journal of Pharmaceutical Analysis 2013年第3期3卷 215-220页

作者： Zhi-Sheng Xie xin-Jun Xu Chun-Yan Xie Jie-Yun huang Mei Yang De-Po Yang School of Pharmaceutical Sciences Sun Yat-Sen University Guangdong Technology Research Center for Advanced Chinese Medicine Hainan Bright Future Pharmaceutical Co.Ltd

Volatile components from Rhizoma Alpiniae Officinarum were respectively extracted by three methods including hydrodistillation, headspace solid-phase microextraction （HS-SPME） and diethyl ether extraction. A total of 40 （hydrodistillation）, 32 （HS-SPME） and 37 （diethyl ether extraction） compounds were respectively identified by gas chromatography-mass spectrometry （GC/MS） and 22 compounds were overlapped, including β-farnesene, 7-muurolene, 2,6-dimethyl-6- （4-methyl-3-pentenyl）bicyclo[3.1.1]hept-2-ene, eucalyptol and cadina-1（10）, 4-diene and so forth, varying in relative contents. HS-SPME is fast, sample saving and solvent-free and it also can achieve similar profiles as those from hydrodistillation and solvent extraction. Therefore, it can be the priority for extracting volatile components from medicinal plants.

关键词： Rhizoma AlpiniaeOfficinarum Volatile components Hydrodistillation Headspace solid-phasemicroextraction Diethyl ether extraction Gas chromatography-mass spectrometry

氯化两面针碱通过Wnt/mTOR信号通路缓解热应激水牛乳腺上皮细胞β-酪蛋白含量降低

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南方农业学报 2024年第7期55卷 1897-1906页

作者：张博肖鹏李孟琪周金陈尚江华郑海英田新如黄依林杨小淦杨春艳广西大学动物科学技术学院广西南宁530004 广西水牛研究所/广西水牛遗传繁育重点实验室广西南宁530001

【目的】探究氯化两面针碱(Nitidine chloride,NitC)对热应激水牛乳腺上皮细胞β-酪蛋白含量降低的影响,为实际生产中缓解热应激对水牛乳品质的负面影响提供理论依据。【方法】记录非热应激季节和热应激季节牛舍温湿度指数(Temperature-... 详细信息

【目的】探究氯化两面针碱(Nitidine chloride,NitC)对热应激水牛乳腺上皮细胞β-酪蛋白含量降低的影响,为实际生产中缓解热应激对水牛乳品质的负面影响提供理论依据。【方法】记录非热应激季节和热应激季节牛舍温湿度指数(Temperature-humidity index,THI),检测水牛呼吸频率和直肠温度以判断水牛是否处于热应激状态;采集奶样进行乳成分分析以探究热应激对水牛奶β-酪蛋白含量的影响;以水牛乳腺上皮细胞为研究对象,经40.5℃处理24 h建立细胞热应激模型,使用LiCl和LGK974分别激活和抑制Wnt通路,检测水牛乳腺上皮细胞β-酪蛋白含量及β-酪蛋白合成相关基因和蛋白的表达水平,探究氯化两面针碱缓解热应激水牛乳腺上皮细胞β-酪蛋白含量降低的作用机制。【结果】与非热应激季节相比,热应激季节牛舍THI升高并超过水牛热应激阈值,水牛呼吸频率和直肠温度显著升高(P<0.05,下同),水牛奶β-酪蛋白含量显著降低;细胞试验结果表明,40.5℃处理24 h能显著降低水牛乳腺上皮细胞β-酪蛋白含量、细胞活力及Wnt2、mTOR、β-casein基因和蛋白的相对表达量;而氯化两面针碱处理能有效缓解热应激对水牛乳腺上皮细胞的影响,显著提高水牛乳腺上皮细胞β-酪蛋白含量、细胞活力及Wnt2、mTOR、β-casein基因和蛋白的相对表达量。【结论】热应激降低了水牛乳腺上皮细胞β-酪蛋白含量及β-酪蛋白合成相关基因和蛋白的相对表达量,氯化两面针碱则通过Wnt/mTOR信号通路提高水牛乳腺上皮细胞β-酪蛋白含量、细胞活力及Wnt2、mTOR、β-casein基因和蛋白的相对表达量,以缓解热应激造成的水牛乳腺上皮细胞β-酪蛋白含量降低。

关键词：氯化两面针碱热应激水牛乳腺上皮细胞 Wnt/mTOR通路 β-酪蛋白

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TMC BC ROBO 6智能采血系统故障维修3例

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医疗卫生装备 2024年第6期45卷 113-116页

作者：黄雄奕何潇潇潘克新段傲文徐力毛凯陆军军医大学大坪医院医学工程科重庆400042

简要介绍了TMC BC ROBO 6智能采血系统的工作原理,分析了该设备在日常使用中出现的3例故障的原因,并给出了故障排除方法,为临床工程师排除类似故障提供了参考。

关键词： TMC BC ROBO 6智能采血系统静脉采血故障维修

Characteristics of Drag Coefficient in Different Coastal Regions of the South China Sea Under Tropical Cyclones-An Observational Study

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Journal of Tropical Meteorology 2020年第4期26卷 417-427页

作者： YUAN Jin-nan SONG Li-li CHEN Wen-chao ZHI Shi-qun BI Xue-yan LIU Chun-xia huang Hui-jun Guangzhou Institute of Tropical and Marine Meteorology CMAGuangzhou 510641 China Public Meteorological Service Center CMABeijing 100081 China Guangdong Climate Center Guangzhou 510641 China

To investigate the values of 10-m drag coefficient(CD ) in different coastal areas under the influence of tropical cyclones, the present study used the observational data from four towers in different coastal areas of the South China Sea(SCS) during six tropical cyclone(TC) passages, and employed the eddy covariance method and the flux profile *** analysis of footprint showed that the fluxes at Zhizai Island(ZZI), Sanjiao Island(SJI) and Donghai Island(DHI)were influenced basically by the ocean, and the flux at Shangyang Town(SYT) was influenced mainly by the land. The results showed that the dependence relationships of CD on 10-m wind speed(U10) in four different coastal areas under the influence of TCs were different. CD at ZZI and SJI initially increased and then decreased as U10 increased, similar to the pattern over the ocean. CD at ZZI and SJI represented the values over shallow water with seawater depths of ~7 m and ~2 m, respectively. Moreover, the critical wind speed at which CD peaked gradually decreased as the seawater depth became shallower in the coastal areas. CD at DHI and SYT decreased monotonously as U10 increased, similar to the pattern over the land. CD at DHI represented the value over the transition zone from shallow water to coastal land, and CD at SYT represented the value over the coastal land. Meanwhile, the eddy covariance method and the flux profile method were compared at ZZI and SYT during TC passages. It was found that their CD values obtained by the two methods were close. Finally, the parameterizations of observed u*and CD as a function of U10 over four different coastal areas were given under the influence of high winds. These parameterizations of observed CD may be used in high-resolution numerical models for landfalling TC forecast.

关键词： high winds drag coefficient eddy covariance flux profile coastal areas

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神经认知障碍患者多成分运动干预的研究进展

浙江大学学报（医学版） 2022年第1期51卷 38-46页

作者：金群黄丽华浙江大学医学院附属第一医院护理部浙江杭州310003 衢州市第三医院精神二科浙江衢州324000

神经认知障碍是一组以认知功能受损和运动能力下降为主要特征的临床综合征,非药物干预方式如体育锻炼在治疗中具有优势。多成分运动是多种体育锻炼方式的组合,包括力量训练、耐力训练、平衡训练和柔韧性训练,可以通过增加神经认知障碍... 详细信息

神经认知障碍是一组以认知功能受损和运动能力下降为主要特征的临床综合征,非药物干预方式如体育锻炼在治疗中具有优势。多成分运动是多种体育锻炼方式的组合,包括力量训练、耐力训练、平衡训练和柔韧性训练,可以通过增加神经认知障碍患者的肌肉质量、力量和耐力改善其步态、平衡能力和心肺功能,同时也可以减少老年人跌倒的风险。本文对神经认知障碍患者多成分运动的益处、干预前后的评估方法、四种干预方案及临床应用等文献进行综述,以期为临床实践提供依据,促进多成分运动在神经认知障碍患者中的应用。

关键词：神经认知障碍非药物干预多成分运动运动疗法综述

Time-sequential color code division multiplexing holographic display with metasurface

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Opto-Electronic Advances 2023年第8期6卷 8-16页

作者： xin Li Qinmiao Chen Xue Zhang Ruizhe Zhao Shumin Xiao Yongtian Wang Lingling huang Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China MoE Key Laboratory of Photoelectronic Imaging Technology and System and MIIT Key Laboratory of Photonics Information TechnologySchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information SystemHarbin Institute of Technology(Shenzhen)Shenzhen 518055China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Color metasurface holograms are powerful and versatile platforms for modulating the amplitude,phase,polarization,and other properties of light at multiple operating ***,the current color metasurface holography can only realize static *** this study,we propose and demonstrate a multiplexing metasurface technique combined with multiwavelength code-division multiplexing(CDM)to realize dynamic *** code references are utilized to record information within a single metasurface and increase the information capacity and security for anticracks.A total of 48 monochrome images consisting of pure color characters and multilevel color video frames were reconstructed in dual polarization channels of the birefringent metasurface to exhibit high information density,and a video was displayed via sequential illumination of the corresponding code patterns to verify the ability of dynamic *** approach demonstrates significant application potential in optical data storage,optical encryption,multiwavelengthversatile diffractive optical elements,and stimulated emission depletion microscopy.

关键词： metasurface color holography dynamic display code division multiplexing