检索结果-南通市图书馆

Electrical stimulation for brighter persistent luminescence

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第8期13卷 1590-1601页

作者： Xilin ma yuhua Wang Takatoshi Seto Key Laboratory for Special Function materials and Structural Design of the Ministry of Education National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology of National Development and Reform CommissionDepartment of Materials ScienceSchool of Materials and EnergyLanzhou UniversityNo.222South Tianshui RoadLanzhouGansu 730000China

An immature understanding of the mechanisms of persistent luminescence(PersL)has hindered the development of new persistent luminescent materials(PersLMs)with increased *** this regard,in-situ direct current(DC)electric field measurements were conducted on a layered structure composed of the SrAl_(2)O4:Eu^(2+),Dy^(3+)phosphor,and an *** this study,the photoluminescence(PL)and afterglow properties were investigated with respect to voltage by analyzing the current signal and thermoluminescence(TL)*** intensity of PersL increased due to a novel phenomenon known as“external electric field stimulated enhancement of initial brightness of afterglow”.This dynamic process was illustrated via the use of a rate equation approach,where the electrons trapped by the ultra-shallow trap at 0.022 eV could be transferred through the conduction band during long *** afterglow intensity could reach 0.538 cdm^(-2)at a 6 V electric *** design of an electric field stimulation technique enables the enhancement of the intensity of PersLMs and provides a new perspective for exploring the fundamental mechanics of certain established PersLMs.

关键词： spectroscopy. luminescence conduction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

肺功能视频康复教育在COPD患者中的应用

云南医药 2024年第4期45卷 111-114页

作者：马玉华徐春华张睿岳莉玉溪市人民医院/昆明医科大学第六附属医院呼吸与危重症医学科云南玉溪653100

目的探讨肺功能康复示教片在COPD患者中的应用效果。方法将260例COPD患者随机分为2组,对照组采用常规健康宣教的方法,实验组采用科室自制的肺功能康复视频示教片进行肺功能康复锻炼和健康宣教。结果实验组除肺功能训练器外各项功能康复... 详细信息

目的探讨肺功能康复示教片在COPD患者中的应用效果。方法将260例COPD患者随机分为2组,对照组采用常规健康宣教的方法,实验组采用科室自制的肺功能康复视频示教片进行肺功能康复锻炼和健康宣教。结果实验组除肺功能训练器外各项功能康复锻炼掌握率优于对照组,差异有统计学意义(P<0.01),结论肺功能康复视频示教片可显著提高COPD患者健康教育效果和患者的依从性,从而提升患者满意率。

关键词： COPD患者肺康复视频示教片依从性满意率

三江源果洛地区日照时数变化特征及影响因子分析

在线全文

学校读者我要写书评

暂无评论

气象科技进展 2024年第2期14卷 74-78,93页

作者：马玉花刘金青沈洁赵洪奎青海省果洛州气象局玛沁814000 青海省达日县气象局达日814200 青海省西宁市气象局西宁810001 青海省果洛州农牧综合服务中心玛沁814000

利用三江源果洛地区6个站1980—2019年的日照资料,分析了该地区日照时数的变化特征及其影响因子。结果表明:三江源果洛地区日照时数的空间分布呈现从西北向东南逐渐减少的趋势;近40年的日照时数以-40.2 h/(10 a)的趋势显著减少;日照时... 详细信息

利用三江源果洛地区6个站1980—2019年的日照资料,分析了该地区日照时数的变化特征及其影响因子。结果表明:三江源果洛地区日照时数的空间分布呈现从西北向东南逐渐减少的趋势;近40年的日照时数以-40.2 h/(10 a)的趋势显著减少;日照时数在春、夏、秋、冬四季均呈减少趋势,变化率分别为-11.4 h/(10 a)、-8.2 h/(10 a)、-11.8 h/(10 a)、-8.2 h/(10 a);月平均日照时数的分布呈“三峰三谷”型,4月为全年日照时间最多的月份;根据Hurst指数的H值判断,日照时数变化与过去一致,呈较强的减少趋势,四季以及各站日照时数的变化趋势亦与过去一致;日照时数的变化与总云量、低云量、降水量存在显著的负相关关系,其中低云量对日照时数的影响最大,其次是总云量、降水量。

关键词：三江源果洛地区日照时数变化特征影响因子

Construction of oxygen-vacancies-rich S-scheme BaTiO_(3)/red phosphorous heterojunction for enhanced photocatalytic activity

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2023年第25期156卷 217-229页

作者： yuhua ma Xiadiye Aihemaiti Kezhen Qi Shiyin Wang Yanjie Shi Zhuanhu Wang Minghe Gao Fuhe Gai Yulian Qiu College of Chemistry and Chemical Engineering Xinjiang Normal UniversityUrumqi 830054China Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic materials Xinjiang Normal UniversityUrumqi 830054China College of Pharmacy Dali UniversityDali 671000China

The S-scheme heterojunctions can effectively separate photogenerated electrons and holes,retain their high redox capacity,and provide great prospects for enhancing the photocatalytic activity of the composites in different ***,S-scheme heterojunction photocatalytic materials were rationally designed and prepared by a simple hydrothermal method between narrow-bandgap red phosphorus(HRP)and wide-bandgap BaTiO_(3)(BTO)*** to the effective charge separation and redox ability from the S-scheme mechanism and oxygen vacancies,BTO/HRP exhibited good photoelectrochemical and photocatalytic degradation *** photoreaction tests demonstrated that BTO/HRP had high practicality in the removal of pollutants from wastewater;its photodegradation rate of Rhodamine B reached 3.029×10^(−1) min^(−1) in 12 min;and it could inactivate 1.8×10^(9) CFU/mL of *** in 1 h,with an antibacterial rate of 99.8%.This paper provided a promising photocatalyst for pollutant removal and a new strategy for the fabrication of efficient RP-based photocatalytic materials.

关键词： S-scheme heterojunction Red phosphorous BaTiO3 Photocatalytic activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

湿法氧化提取水中碳的方法优化

核技术 2024年第3期47卷 47-54页

作者：李磊刘卫马玉华李志强邓珂曾林林徐勇衡阳师范学院衡阳421010 中国科学院上海应用物理研究所上海201800

水中碳的提取是液闪谱仪测量环境水中14C的重要预处理步骤。本研究采用过硫酸钠与Fenton试剂相结合的湿法氧化体系以及磷酸酸化、氮气鼓泡的方法,对体积10 L已知碳组分(去离子水+蔗糖)和未知碳组分的两种水样进行湿法氧化碳提取的实验,... 详细信息

水中碳的提取是液闪谱仪测量环境水中14C的重要预处理步骤。本研究采用过硫酸钠与Fenton试剂相结合的湿法氧化体系以及磷酸酸化、氮气鼓泡的方法,对体积10 L已知碳组分(去离子水+蔗糖)和未知碳组分的两种水样进行湿法氧化碳提取的实验,同时对未知碳组分水样进行湿法氧化与185 nm紫外氧化相结合的碳提取实验。通过实验确定试剂最佳投放时间与顺序,优化试剂投放量及配比。在优化条件下,90℃水温反应3 h后,已知碳组分(去离子水+蔗糖)的有机碳提取率高于96%;未知碳组分的水中总碳提取率为(96.8±0.3)%,其中无机碳的提取率>98.5%、有机碳提取率为(93.4±0.2)%,其中单宁酸类有机物氧化率仅有(88±0.2)%。湿法氧化+185 nm紫外氧化联用后,未知碳组分的总碳提取率提升至(98.3±0.5)%,其中无机碳提取率≥99%、有机碳提取率达到(95.6±1.4)%。由此表明,湿法氧化法不能用典型有机物的碳回收率来代表实际水样中的碳回收率,湿法氧化与185 nm紫外氧化联用是水中碳提取的更好方法。

关键词：水中14C 湿法氧化紫外有机碳无机碳

Allometric models for aboveground biomass of six common subtropical shrubs and small trees

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2022年第4期33卷 1317-1328页

作者： Cheng Huang Chun Feng yuhua ma Hua Liu Zhaocheng Wang Shaobo Yang Wenjing Wang Songling Fu Han Y.H.Chen College of Forestry and Landscape Architecture Anhui Agricultural University130 Changjiang West RoadHefei 230036AnhuiPeople’s Republic of China Faculty of Natural Resources management Lakehead University955 Oliver RoadThunder BayON P7B 5E1Canada

The aboveground biomass(AGB)of shrubs and small trees is the main component for the productivity and carbon storage of understory vegetation in subtropical secondary ***,few allometric models exist to accurately evaluate understory *** estimate the AGB of five common shrub(diameter at basemall tree species(mass in their stems compared with branches,with the lowest biomass in the ***-specific allometric models that employed stem diameter and the combined variables of D~2H andρDH as predictors accurately estimated the components and total AGB,with R^(2) values from 0.602 and 0.971.A multi-species shrub allometric model revealed that wood density×diameter×height(ρDH)was the best predictor,with R^(2) values ranging from between 0.81 and 0.89 for the components and total AGB,*** results indicated that height(H)and diameter(D)were effective predictors for the models to estimate the AGB of the six species,and the introduction of wood density(ρ)improved their *** optimal models selected in this study could be applied to estimate the biomass of shrubs and small trees in subtropical regions.

关键词： Aboveground biomass Allometric models Shrubs Small trees Subtropical forests

The long-circulating effect of pegylated nanoparticles revisited via simultaneous monitoring of both the drug payloads and nanocarriers

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2022年第5期12卷 2479-2493页

作者： Wufa Fan Haixia Peng Zhou Yu Luting Wang Haisheng He yuhua ma Jianping Qi Yi Lu Wei Wu Key Laboratory of Smart Drug Delivery of MOE School of PharmacyFudan UniversityShanghai 201203China Center for Medical Research and Innovation Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China Shanghai Skin Disease Hospital Tongji University School of MedicineShanghai 200443China Key Laboratory for Tibet Plateau Phytochemistry of Qinghai Province School of PharmacyQinghai Nationalities UniversityXining 810007China

The long-circulating effect is revisited by simultaneous monitoring of the drug payloads and nanocarriers following intravenous administration of doxorubicin(DOX)-loaded methoxy polyethylene glycol-polycaprolactone(mPEG-PCL) nanoparticles. Comparison of the kinetic profiles of both DOX and nanocarriers verifies the long-circulating effect, though of limited degree, as a result of pegylation. The nanocarrier profiles display fast clearance from the blood despite dense PEG decoration;DOX is cleared faster than the nanocarriers. The nanocarriers circulate longer than DOX in the blood, suggesting possible leakage of DOX from the nanocarriers. Hepatic accumulation is the highest among all organs and tissues investigated, which however is reversely proportionate to blood circulation time. Pegylation and reduction in particle size prove to extend circulation of drug nanocarriers in the blood with simultaneous decrease in uptake by various organs of the mononuclear phagocytic system. It is concluded that the long-circulating effect of mPEG-PCL nanoparticles is reconfirmed by monitoring of either DOX or the nanocarriers, but the faster clearance of DOX suggests possible leakage of a fraction of the payloads. The findings of this study are of potential translational significance in design of nanocarriers towards optimization of both therapeutic and toxic effects.

关键词： Long-circulating In vivo fate Aggregation-caused quenching Nanoparticles mPEG-PCL Doxorubicin Drug delivery Pharmacokinetics

Tianjin Song and Dance Theatre Visits Japan

在线全文

学校读者我要写书评

暂无评论

Voice of Friendship 2006年第2期 42-44页

作者： ma yuhua

At the invitation of the Japanese Min-On Concert Association, a 47-member troupe of Tianjin Song and Dance Theatre organized and sent by the CPAFFC gave 55 performances in 37 cities of Japan from September 12 to Novem... 详细信息

关键词： Dance Tianjin dance entitled invitation attracting

Notes on a Visit to Nagasaki by Beijing Yuying Beiman Alumni Specialists Chorus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Voice of Friendship 2012年第1期 28-29页

作者： ma yuhua

At the invitation of the Nagasaki Municipal Government, the Nagasaki International Tourism and Convention Association and the Executive Committee of madame Butterfly International Concours in

关键词： invitation Butterfly visited Notes delegation frie