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Pt/y2O3：Eu3＋ composite nanotubes： Enhanced photoluminescence and application in dye-sensitized solar cells

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Nano Research 2016年第8期9卷 2338-2346页

作者： Mingqi yu Jiamin Su guofeng Wang yadong Li Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China Department of Chemistry Tsinghua University Beijing 100084 China

y（OH）3：Eu3＋ nanotubes were synthesized using a facile hydrothermal method, and then, Pt particles were grown on the surface of the nanotubes using a combination of vacuum extraction and annealing. The resulting Pt/y2O3：Eu3＋ composite nanotubes not only exhibited enhanced red luminescence under 255- or 468-nm excitation but could also be used to improve the efficiency of dye- sensitized solar cells, resulting in an efficiency of 8.33%, which represents a significant enhancement of 11.96% compared with a solar cell without the com- posite nanotubes. Electrochemical impedance spectroscopy results indicated that the interfacial resistance of the TiO2-dyel I3/I- electrolyte interface of the TiO2-Pt/y203：Eu3~ composite cell was much smaller than that of a pure TiO2 cell. In addition, the TiO2-Pt/y2O3：Eu3＋ composite cell exhibited a shorter electron transport time and longer electron recombination time than the pure TiO2 cell.

关键词： Pt/y2O3:Eu3+ nanocrystals luminescence dye-sensitized solar cells

血清CD73和帕金森病患者运动障碍相关性研究

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医学研究杂志 2024年第1期53卷 75-79页

作者：赵媛刘向杨国锋河北医科大学第二医院老年病科石家庄050051

目的探索PD患者血清CD73表达水平,以及血清CD73与帕金森病(Parkinson′s disease,PD)运动障碍严重程度的相关性。方法共纳入60岁以上PD患者97例和健康对照者71例,收集研究对象的基本资料包括年龄、性别、吸烟史,PD患者同时收集病程、H&... 详细信息

目的探索PD患者血清CD73表达水平,以及血清CD73与帕金森病(Parkinson′s disease,PD)运动障碍严重程度的相关性。方法共纳入60岁以上PD患者97例和健康对照者71例,收集研究对象的基本资料包括年龄、性别、吸烟史,PD患者同时收集病程、H&y分期、UPDRS-Ⅲ评分和用药情况,并依据H&y分期将PD患者分为轻度PD组和中重度PD组;抽取研究对象空腹状态下静脉血进行血清CD73检测;采用二元Logistic回归分析统计分析年龄、性别和血清CD73等因素与PD的相关性;受试者工作特征曲线分析用于血清CD73的诊断价值预测;Pearson法用于统计分析PD患者血清CD73与H&y分期、UPDRS-Ⅲ评分的相关性。结果PD患者血清CD73明显低于健康对照者,二元Logistic回归结果显示血清CD73水平降低是PD的独立危险因素。血清CD73水平低于2.85U/L对诊断PD的敏感度较高。在PD患者中H&y分期越高,血清CD73水平越低;经过Pearson相关性分析得出,血清CD73水平与H&y分期、UPDRS-Ⅲ评分呈显著负相关。结论血清CD73水平降低会显著增加PD风险,且水平越低,PD患者运动功能障碍越严重。

关键词：帕金森病 CD73 运动功能障碍 H&y分期 UPDRS评分

水果及其制品中L-苹果酸和D-苹果酸含量测定

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中国果树 2024年第8期 104-108页

作者：匡立学聂继云徐国锋中国农业科学院果树研究所农业农村部果品质量安全风险评估实验室(兴城)农业农村部果品及苗木质量监督检验测试中心(兴城)辽宁125100 青岛农业大学

应用高效液相色谱仪,以苹果、梨、橙鲜果和苹果汁、桃罐头、蓝莓果酱、苹果脆片为试材,建立了水果及其制品中L-苹果酸和D-苹果酸含量的检测方法。通过对流动相、色谱柱、检测波长、柱温和流速的筛选和优化,确定了最佳的检测条件。结果表... 详细信息

应用高效液相色谱仪,以苹果、梨、橙鲜果和苹果汁、桃罐头、蓝莓果酱、苹果脆片为试材,建立了水果及其制品中L-苹果酸和D-苹果酸含量的检测方法。通过对流动相、色谱柱、检测波长、柱温和流速的筛选和优化,确定了最佳的检测条件。结果表明:苹果酸的2种对映异构体浓度在0.02~1.0 mg/mL具有良好的线性关系;L-苹果酸和D-苹果酸在水果及其制品中添加回收率在81.2%~112.3%,5次平行试验的相对标准偏差均小于10%,反映本标准方法具有良好的准确性,能满足实际检测需要。该方法准确度高、重现性好,适用于水果及其制品中L-苹果酸和D-苹果酸含量的测定。

关键词：水果水果制品 L-苹果酸 D-苹果酸液相色谱

Confinement and antenna effect for ultrasmall y_(2)O_(3):Eu^(3+) nanocrystals supported by MOF with enhanced near-UV light absorption thereby enhanced luminescence and excellently multifunctional applications

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Nano Research 2021年第3期14卷 720-729页

作者： Hongyi Xu Wenjing yu Kai Pan guofeng Wang Peifen Zhu Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin150080China Department of Physics and Engineering Physics The University of TulsaTulsaOK74104USA

A novel host-guest luminous system with enhanced near-UV light absorption thereby enhanced luminescence are designed based on the synergism of quantum confinement,spatial confinement,and antenna effect,where ultrasmall y_(2)O_(3):Eu^(3+)nanocrystals are fixed inside MOF(Eu/y-BTC)as supporting *** Eu/y-BTC not only limits the size and leads to lattice distortion of y_(2)O_(3):Eu^(3+)nanocrystals and controls the distance between nanocrystals,but also promotes the light absorption and *** significantly red-shifted and broadened charge transfer band of y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)leads to the excellent applications of y_(2)O_(3):Eu^(3+)in white light-emitting diodes(LEDs).Our results show that white light with superior color quality(CRI>90)and extremely high luminous efficacy(an LER of 335 lm/W)could be achieved using y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)as red *** y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)also improves the photoelectric performance of dye-sensitized solar cells(DSSCs),not only because y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)has a large specific surface area and the adsorption amount of the dye is increased,but also because the valence band position of y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)is 2.41 eV,which can provide an additional energy level between the TiO2 and dye,promoting electron *** these advantageous features,the multifunctional y_(2)O_(3):Eu^(3+)/(Eu/y-BTC)composite product will open new avenues in white LEDs and DSSCs.

关键词： confinement effect antenna effect enhanced luminescence ultrasmall y_(2)O_(3):Eu^(3+)nanocrystals MOFs multifunctional applications

Li_(2)O/Na_(2)O对yAS微晶玻璃结构、析晶与力学性能的影响

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硅酸盐通报 2024年第4期43卷 1292-1300页

作者：郑伟宏刘国凤张浩王启东张梦豪袁坚武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070

透明微晶玻璃由于优异的力学性能被广泛应用于电子领域。本文采用熔融法制备了不同质量分数Li_(2)O和Na_(2)O的y_(2)O_(3)-Al_(2)O_(3)-SiO_(2)(yAS)微晶玻璃,通过Raman、DSC、XRD、FESEM、UV-VIS-NIR等测试方法研究了其结构特征、析晶... 详细信息

透明微晶玻璃由于优异的力学性能被广泛应用于电子领域。本文采用熔融法制备了不同质量分数Li_(2)O和Na_(2)O的y_(2)O_(3)-Al_(2)O_(3)-SiO_(2)(yAS)微晶玻璃,通过Raman、DSC、XRD、FESEM、UV-VIS-NIR等测试方法研究了其结构特征、析晶与力学性能。结果表明:当碱金属氧化物R_(2)O(R=Li,Na)总量保持不变,随着Li_(2)O取代Na_(2)O含量的增加,yAS微晶玻璃的转变温度、软化温度和结晶峰温度逐渐降低,Q^(4)基团对应的含量逐渐减少,说明Li_(2)O作为网络外体使yAS微晶玻璃结构逐步解聚,玻璃的析晶能力逐渐增强。在同一热处理制度下,随着Li_(2)O取代量的增加,yAS微晶玻璃维氏硬度显著提升,而透过率明显下降。在680℃/10 h+750℃/1 h热处理制度下,可以制备出晶体大小一致且分布均匀的以钇稳定氧化锆为主晶相的透明yAS微晶玻璃,此时2%(质量分数,下同)Na_(2)O+4%Li_(2)O yAS微晶玻璃具有良好的综合性能,如维氏硬度为646 HV,断裂韧性为1.07 MPa·m^(1/2),透过率为85.7%,在诸多领域具有巨大的应用潜力。

关键词： y_(2)O_(3)-Al_(2)O_(3)-SiO_(2) 透明微晶玻璃碱金属氧化物结构析晶维氏硬度

重载码头堆场CFG桩网复合地基离心模型试验研究

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海洋工程 2024年第1期42卷 158-164页

作者：周春儿董华钢王年香徐光明顾行文任国峰广东省航运规划设计院有限公司广东广州510050 南京水利科学研究院岩土工程研究所江苏南京210029 水灾害防御全国重点实验室江苏南京210098

CFG桩网复合地基广泛应用于处理软土地基。采用土工离心模型试验研究某码头堆场超大荷载下CFG桩网复合地基的变形和桩土应力特性,试验模拟了地基、CFG桩、树根桩、加筋垫层、防尘网和轨道梁基础、矿石堆载等,分析了超大荷载作用下复合... 详细信息

CFG桩网复合地基广泛应用于处理软土地基。采用土工离心模型试验研究某码头堆场超大荷载下CFG桩网复合地基的变形和桩土应力特性,试验模拟了地基、CFG桩、树根桩、加筋垫层、防尘网和轨道梁基础、矿石堆载等,分析了超大荷载作用下复合地基表面变形、桩顶轴力、桩间土压力、桩土应力比的变化规律。试验结果表明,复合地基的沉降速率在稳定控制标准之内,沉降量满足堆场使用要求,防尘网基础和轨道梁基础水平位移和沉降均很小,桩土应力比为25.2~43.8,CFG桩网复合地基在350 kPa荷载作用下是稳定安全的,达到了预期加固效果。

关键词： CFG桩复合地基软土地基桩土应力重载码头离心模型试验

Ecdysteroids in the pupae of Opogona sacchari (Bojer), a new invasive alien pest

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Chinese Science Bulletin 2006年第11期51卷 1324-1327页

作者： WAng Fanghai ZHAng Guren WEN Ruizhen HE guofeng State Key Laboratory for Biological Control & Institute of Entomology Sun Yat-sen University Guangzhou 510275 China

In order to understand the composition and quantitative variation of ecdysteriods in the pu- pae of Opogona sacchari (Bojer), a new invasive alien pest, we analyzed the pupal ecdysteroid com- position and titers in this pest. The main component of ecdysteriods in the pupae of O. sacchari is 20-hydroxyecdysone. The titre of ecdysteriods in both male pupae and female pupae get higher gradually, and then decreased slowly after reaching a peak (80 ng/pupa). The titre of ecdysteriods was about 30 ng/pupa in the later stage of pupae. The peak of male pupae appeared on the third day, but the peak of female pupae lasted from the second day to the fourth day during pupal developments. The ecdysteroid content was higher in female pupae than in male pupae during specific pupal time (the 1st, 2nd, 4th, 5th, 6th day). We also found that the titre of ec- dysteroids in posterior part of pupae was higher than in anterior part of pupae obviously.

关键词：蜕皮甾体蛹入侵有害物 Opogona sacchari

Ecdysteroids in the larvae of Opogona sacchari(Bojer),a invasive alien pest

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Chinese Science Bulletin 2007年第2期52卷 205-208页

作者： WAng FangHai ZHAng GuRen WEN RuiZhen HE guofeng State Key Laboratory for Biological Control & Institute of Entomology Sun Yat-sen University Guangzhou 510275 China

In order to understand the composition and quantitative variation of ecdysteriods in the larvae of Opogona sacchari (Bojer), a invasive alien pest, we analyzed the larval ecdysteroid composition and titers in this pest. The main component of ecdysteriods in the larvae of O. sacchari is 20-hydroxyecdysone, and also there is a little 26-hydroxyecdysone. The titer of ecdysteriods in the larvae from the 1st instar to the 7th instar was gotten higher gradually compared on ng ecdyster-oid/larva, but no regularity could be found about the titer if compared on ng ecdysteroid/g avoirdupois. There was only one peak of ecdysteroids (0.5475 ng/larva) showed at day 2 during the developmental time of the 6th instar larvae. However, there were two peaks appearing during the developmental time of the 7th instar larvae , one peak (0.29415 ng/larva) at day 3, another (0.214 ng/larva) at day 5.

关键词：外来生物幼虫害虫植物

不同方式建立伴认知障碍的耐药性癫痫模型大鼠的对比研究

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中华神经医学杂志 2024年第3期23卷 217-224页

作者：李如月任勉勉黎辰伍国锋孙萍王丽琨贵州医科大学临床医学院急诊科贵阳550004 贵州医科大学附属医院急诊科贵阳550004 贵阳市第二人民医院神经内科贵阳550081

目的探讨通过腹腔注射氯化锂-匹罗卡品后颅内注射匹罗卡品、卡巴胆碱两种方式建立的伴认知障碍的耐药性癫痫模型大鼠在行为学、脑电图和认知功能方面的差异。方法成年雄性SD大鼠160只,按随机数字表法选择10只作为正常对照组,50只腹腔注... 详细信息

目的探讨通过腹腔注射氯化锂-匹罗卡品后颅内注射匹罗卡品、卡巴胆碱两种方式建立的伴认知障碍的耐药性癫痫模型大鼠在行为学、脑电图和认知功能方面的差异。方法成年雄性SD大鼠160只,按随机数字表法选择10只作为正常对照组,50只腹腔注射氯化锂和匹罗卡品制备癫痫模型(氯化锂-匹罗卡品组),剩余100只腹腔注射氯化锂和匹罗卡品后按随机数字表法分为2组,每组50只,分别颅内注射匹罗卡品和卡巴胆碱制备癫痫模型(匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组)。使用视频监控系统观察大鼠自发性癫痫发作(SRSs)次数及发作持续时间,2周后腹腔注射苯巴比妥和苯妥英钠进行耐药性筛选。采用BL-420生物信号采集处理系统记录各组大鼠脑电图波幅及癫痫波的频率。采用新事物识别实验检测大鼠对新事物的探索,采用y迷宫自由探索实验和新异臂实验检测大鼠的空间识别记忆能力,采用Morris水迷宫实验检测大鼠的空间记忆能力。结果(1)氯化锂-匹罗卡品组大鼠存活24只(48.00%),匹罗卡品-匹罗卡品组存活25只(78.00%),匹罗卡品-卡巴胆碱组存活21只(65.62%),最终分别筛选出耐药癫痫模型大鼠7、9、8只。视频监测显示匹罗卡品-匹罗卡品组和匹罗卡品-卡巴胆碱组大鼠SRSs发作次数、发作持续时间均高于氯化锂-匹罗卡品组,差异均有统计学意义(P<0.05)。(2)匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组大鼠脑电图波幅均高于氯化锂-匹罗卡品组,氯化锂-匹罗卡品组、匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组大鼠脑电图癫痫波出现频率逐渐增高,差异均有统计学意义(P<0.05)。(3)正常对照组、氯化锂-匹罗卡品组、匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组大鼠的鉴别指数、正确率、新异臂移动距离/总移动距离、新异臂停留时间均逐渐降低,差异均有统计学意义(P<0.05)。与正常对照组比较,匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组大鼠穿越原平台区域次数较少,差异均有统计学意义(P<0.05)。与正常对照组、氯化锂-匹罗卡品组、匹罗卡品-匹罗卡品组比较,匹罗卡品-卡巴胆碱组大鼠目标象限活动距离较短,差异均有统计学意义(P<0.05)。正常对照组、氯化锂-匹罗卡品组、匹罗卡品-匹罗卡品组、匹罗卡品-卡巴胆碱组大鼠进入目标象限次数逐渐减少,差异均有统计学意义(P<0.05)。结论通过腹腔注射氯化锂和匹罗卡品后颅内注射卡巴胆碱建立的耐药性癫痫模型大鼠存活率高,SRSs发作率高,认知功能损伤程度更重,更适合用于伴认知障碍的耐药性癫痫相关机制的研究。

关键词：耐药性癫痫认知功能匹罗卡品卡巴胆碱行为学脑电图