检索结果-南通市图书馆

Nano Research 2016年第5期9卷 1497-1506页

作者： xinxia wang Bin wang Jun Zhong Feipeng Zhao Na Han Wenjing Huang Min Zeng Jian Fan Yanguang Li Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow University Suzhou 215123 China

The past decade has witnessed a rapid surge of interest in the research and development of non-precious metal-based electrocatalysts for the oxygen reduction reaction （ORR）. Until now, the best catalysts in acidic electrolytes have exclusively been Fe-N-C-type materials from high-temperature pyrolysis. Despite the ORR activities of metal phthalocyanine or porphyrin macrocydes having long been known, their durability remains poor. In this work, we use these macrocycles as a basis to develop a novel organic-carbon hybrid material from in-situ polymerization of iron phthalocyanine on conductive multiwalled carbon nanotube scaffolds using a low-temperature microwave heating method. At an optimal polymer- to-carbon ratio, the hybrid electrocatalyst exhibits excellent ORR activity with a positive half-wave potential （0.80 V）, large mass activity （up to 18.0 A/g at 0.80 V）, and a low peroxide yield （〈3%）. In addition, strong electronic coupling between the polymer and carbon nanotubes is believed to suppress demetallization of the macrocycles, significantly improving cycling stability in acids. Our study represents a rare example of non-precious metal-based electrocatalysts prepared without high-temperature pyrolysis, while having ORR activity in acidic media with potential for practical applications.

关键词： iron polyphthalocyanine carbon nanotubes organic-carbon hybrid oxygen reduction reaction electrocatalysis

Selective electrochemical production of hydrogen peroxide at zigzag edges of exfoliated molybdenum telluride nanoflakes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2020年第8期7卷 1360-1366页

作者： Xuan Zhao Yu wang Yunli Da xinxia wang Tingting wang Mingquan Xu Xiaoyun He Wu Zhou Yafei Li Jonathan N.Coleman Yanguang Li Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University College of Chemistry and Materials Science Nanjing Normal University College of Material Science and Opto-Electronic Technology University of Chinese Academy of Sciences School of Physical Sciences and CAS Key Laboratory of Vacuum Sciences University of Chinese Academy of Sciences School of Physics CRANN and AMBER Centers Trinity College Dublin

The two-electron reduction of molecular oxygen represents an effective strategy to enable the green, mild and on-demand synthesis of hydrogen peroxide. Its practical viability, however, hinges on the development of advanced electrocatalysts, preferably composed of non-precious elements, to selectively expedite this reaction, particularly in acidic medium. Our study here introduces 2H-MoTe;for the first time as the efficient non-precious-metal-based electrocatalyst for the electrochemical production of hydrogen peroxide in acids. We show that exfoliated 2H-MoTe;nanoflakes have high activity(onset overpotential ～140 mV and large mass activity of 27 A g;at 0.4 V versus reversible hydrogen electrode), great selectivity（H;O;percentage up to 93%） and decent stability in 0.5 M H;SO;. Theoretical simulations evidence that the high activity and selectivity of 2H-MoTe;arise from the proper binding energies of HOO;and O;at its zigzag edges that jointly favor the two-electron reduction instead of the four-electron reduction of molecular oxygen.

关键词： hydrogen peroxide production non-precious-metal-based electrocatalyst molybdenum telluride liquid phase exfoliation zigzag edges

叙事护理对经皮冠状动脉介入治疗冠心病患者焦虑和睡眠的影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国当代医药 2024年第11期31卷 172-175页

作者：王敏敏张芳薄静静陈晓阳侯永娜王新霞滨州医学院附属医院心血管内科一病区山东滨州256603

目的探讨叙事护理对经皮冠状动脉介入治疗冠心病患者焦虑和睡眠的影响。方法选择2020年7月至2021年3月在滨州医学院附属医院心内科收治的120例经皮冠状动脉介入治疗的冠心病患者为研究对象,按照随机数字表法分对照组(60例)和试验组(60例... 详细信息

目的探讨叙事护理对经皮冠状动脉介入治疗冠心病患者焦虑和睡眠的影响。方法选择2020年7月至2021年3月在滨州医学院附属医院心内科收治的120例经皮冠状动脉介入治疗的冠心病患者为研究对象,按照随机数字表法分对照组(60例)和试验组(60例)。对照组实施常规护理干预措施,试验组在常规护理干预的基础上实施叙事护理。采用焦虑自评量表和匹兹堡睡眠质量指数评估两组患者干预前后焦虑情绪和睡眠质量的变化。结果干预前,两组患者的焦虑和睡眠质量评分比较,差异无统计学意义(P>0.05)。干预后试验组的焦虑评分、睡眠质量评分均低于对照组,差异有统计学意义(P<0.05)。结论叙事护理对改善经皮冠状动脉介入治疗冠心病患者的焦虑情绪,改善患者睡眠质量有显著效果,可以促进患者进行自我管理,提高生活质量。

关键词：叙事护理冠心病经皮冠状动脉介入焦虑睡眠

Bacillus amyloliquefaciens 40 regulates piglet performance,antioxidant capacity,immune status and gut microbiota

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2023年第1期12卷 116-127页

作者： Zipeng Jiang Weifa Su Wentao Li Chaoyue Wen Shuai Du Huan He Yu Zhang Tao Gong xinxia wang Yizhen wang Mingliang Jin Zeqing Lu National Engineering Research Centre for Green Feed and Healthy Farming Zhejiang UniversityHangzhouChina Key Laboratory of Molecular Nutrition Ministry of EducationZhejiang UniversityHangzhouChina Key Laboratory of Animal Nutrition and Feed Ministry of Agriculture and Rural AffairsZhejiang UniversityHangzhouChina Key Laboratory of Animal Nutrition and Feed Nutrition of Zhejiang Province Zhejiang UniversityHangzhouChina College of Animal Science Institute of Feed ScienceZhejiang UniversityHangzhouChina

Probiotics can improve animal growth performance and intestinal *** species,Lactobacillus species,Bifidobacterium species,yeast *** the common types of ***,understanding the effects of probiotics on the immune status and gut microbiota of weaning piglets and how the probiotics exert their impact are still *** study aimed to investigate the effects of Bacillus amyloliquefaciens 40(BA40)on the performance,immune status and gut microbiota of piglets.A total of 12 litters of newborn piglets were randomly divided into 3 *** in control group were orally dosed with phosphate buffered saline;BA40 group and probiotics group were orally gavaged with resuspension BA40 and a probiotics product,*** results showed that BA40 treatment significantly decreased(P<0.05)the diarrhea incidence(from d 5 to 40),diamine oxidase,D-lactate,interleukin(IL)-1βand interferon-γconcentrations compared with control group and probiotics *** BA40 dramatically increased the total antioxidant capacity,IL-10 and secretory immunoglobulin-A concentrations in contrast to control *** the microbial composition,BA40 modulated the microbiota by improving the abundance of Bacteroides,Phascolarctobacterium(producing short-chain fatty acids)and Desulfovibrio and reducing the proliferation of pathogens(Streptococcus,Tyzzerella,Vellionella and paraeggerthella).Meanwhile,a metabolic function prediction explained that carbohydrate metabolism and amino acid metabolism enriched in BA40 group in contrast to control group and probiotics *** correlation analysis,the results demonstrated that BA40-enriched Phascolarctobacterium and Desulfovibrio provide insights into strategies for elevating the health status and performance of weaned ***,BA40 exerted stronger ability in decreasing diarrhea incidence and improved antioxidant activity,gut barrier function and immune status of piglets than the other *** study pr

关键词： Bacillus amyloliquefaciens Piglet Immune status Gut microbiota Metabolic function

A Successful Microbound Diet for the Larval Culture of Chinese Shrimp Fenneropenaeus chinensis

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2005年第3期4卷 267-271页

作者： wang xinxia MAI Kangsen The Key Laboratory of Mariculture Ministry of Edueation Ocean University of China Qingdao 266003 P. R. China

A 13-day feeding trial was carried out to evaluate the effectiveness of a microbound diet for rearing the larvae of Chinese shrimp Fenneropenaeus chinensis in comparison with the live foods that consist of Isochrysis galbana, Chlorella vulgaris, Tetraselrnis chuii, rotifer （Brachionus plicatilis） and Arternia sp. Larvae of 0 to 13d post-hatch （dph） were reared in a temperature-controlled semi-open culture system and stocked at a density of 100 larvae L^-1 in tanks, each containing 50 L sterilized seawater with salinity 30-32. Larvae were manually fed either the live foods or the microbound diet 6 times per day. At 13 dph, the growth of the larvae fed on the microbound diet was approximately 84% of that fed on the live foods. The survival rate of the larvae fed on the microbound diet was 44.29% at 13dph, which was not significantly different from that of larvae fed on live foods （63.55%）. The body length and development index （DI） of the larvae fed on the microbound diet were always lower than those of larvae fed on live foods. However, the differences reached significant levels only at 11 and 13 dph （P〈 0.05）. The mean dry weight loss of the microbound diet was 9.2% after 90 min immersion in seawater, indicating that this diet has a good water stability. The microbound diet contains 52.23% crude protein and 10.27% lipid and is easy to prepare. These characteristics of the diet suggest good potentials for its successful use in the larviculture of other penaeid and fish species.

关键词： Chinese shrimp Fenneropenaeus chinensis microbound diet larviculture

加权Herz型Hardy空间上的交换子的弱型估计

在线全文

学校读者我要写书评

暂无评论

北京师范大学学报（自然科学版） 2006年第4期42卷 353-357页

作者：王新霞北京师范大学数学科学学院

证明了Bochner-Riesz算子和CZ算子的交换子当α=n(1-1/q)时从空间***α,p(ω1;2ω)到空间.Kq,αp,∞(1ω;ω2)的有界性,其中ω1,ω2是Muckernhoupt sA1权.

关键词：加权Herz型Hardy空间 Bochner-Riesz算子 Calderon-Zygmund算子

Impaired Spatial Firing Representations of Neurons in the Medial Entorhinal Cortex of the Epileptic Rat Using Microelectrode Arrays

在线全文

学校读者我要写书评

暂无评论

Research 2024年第2期2023卷 541-552页

作者： Zhaojie Xu Fan Mo Gucheng Yang Penghui Fan Botao Lu Wei Liang Fanli Kong Luyi Jing Wei Xu Juntao Liu Mixia wang Yirong Wu xinxia Cai State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Epilepsy severely impairs the cognitive behavior of *** remains unclear whether epilepsy-induced cognitive impairment is associated with neuronal activities in the medial entorhinal cortex(MEC),a region known for its involvement in spatial *** explore this neural mechanism,we recorded the spikes and local field potentials from MEC neurons in lithium-pilocarpine-induced epileptic rats using self-designed microelectrode *** the open field test,we identified spatial cells exhibiting spatially selective firing properties and assessed their spatial representations in relation to the progression of ***,we analyzed theta oscillations and theta modulation in both excitatory and inhibitory ***,we used a novel object recognition test to evaluate changes in spatial cognitive ability of epileptic *** the epilepsy modeling,the spatial tuning of various types of spatial cells had suffered a rapid and pronounced damage during the latent period(1 to 5 d).Subsequently,the firing characteristics and theta oscillations were *** the chronic period(>10 d),the performance in the novel object experiment *** conclusion,our study demonstrates the detrimental effect on spatial representations and electrophysiological properties of MEC neurons in the epileptic latency,suggesting the potential use of these changes as a"functional biomarker"for predicting cognitive impairment caused by epilepsy.

关键词： epilepsy impaired involvement

Deep brain implantable microelectrode arrays for detection and functional localization of the subthalamic nucleus in rats with Parkinson’s disease

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2024年第4期7卷 439-452页

作者： Luyi Jing Zhaojie Xu Penghui Fan Botao Lu Fan Mo Ruilin Hu Wei Xu Jin Shan Qianli Jia Yuxin Zhu Yiming Duan Mixia wang Yirong Wu xinxia Cai State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

The subthalamic nucleus(STN)is considered the best target for deep brain stimulation treatments of Parkinson’s disease(PD).It is difficult to localize the STN due to its small size and deep *** microelectrode arrays(MEAs)can rapidly and precisely locate the STN,which is important for precise *** this paper,16-channel MEAs modified with multiwalled carbon nanotube/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(MWCNT/PEDOT:PSS)nanocomposites were designed and fabricated,and the accurate and rapid identification of the STN in PD rats was performed using detection sites distributed at different brain *** results showed that nuclei in 6-hydroxydopamine hydrobromide(6-OHDA)-lesioned brains discharged more intensely than those in unlesioned *** addition,the MEA simultaneously acquired neural signals from both the STN and the upper or lower boundary nuclei of the ***,higher values of spike firing rate,spike amplitude,local field potential(LFP)power,and beta oscillations were detected in the STN of the 6-OHDA-lesioned brain,and may therefore be biomarkers of STN *** with the STNs of unlesioned brains,the power spectral density of spikes and LFPs synchronously decreased in the delta band and increased in the beta band of 6-OHDA-lesioned *** may be a cause of sleep and motor disorders associated with ***,this work describes a new cellular-level localization and detection method and provides a tool for future studies of deep brain nuclei.

关键词： Functional localization Implantable microelectrode arrays Parkinson’s disease Subthalamic nucleus

在线全文

学校读者我要写书评

暂无评论

一种新型多功能智能型直流电压表的设计

计算机测量与控制 2014年第1期22卷 300-302页

作者：王党树王新霞西安科技大学电气与控制工程学院西安710054 西安科技大学理学院西安710054

介绍了一款测量范嗣为750～750V且在该范围自动换挡，精度为0．5级直流电压表；设计中把测量信号调理为单片机A／D转换所要求的范同，单片机对信号进行处理，数码管显示，按键设置报警范围，并可进行校表，设计了RS485通信接口与上位机... 详细信息

介绍了一款测量范嗣为750～750V且在该范围自动换挡，精度为0．5级直流电压表；设计中把测量信号调理为单片机A／D转换所要求的范同，单片机对信号进行处理，数码管显示，按键设置报警范围，并可进行校表，设计了RS485通信接口与上位机通信，并把测量范同的测量值变送成420mA电流输出，设置了两路继电器报警输出。

关键词：电压表智能测量自动换挡 MSP430单片机

在线全文

学校读者我要写书评

暂无评论

等效电路法动力锂离子电池组系统建模与仿真

实验室研究与探索 2018年第7期37卷 92-96页

作者：王新霞王党树西安科技大学电气与控制工程学院西安710054 西安科技大学理学院西安710054

以锂离子电池作为研究对象分析了多种电池等效电路模型的优缺点,最终选取二阶RC等效电路模型,搭建了仿真模型。该模型很好地表现了电池的输出特性,不仅直观地反映了开路电压(Open Circuit Voltage,OCV)-荷电状态(State of Charge,SOC)特... 详细信息

以锂离子电池作为研究对象分析了多种电池等效电路模型的优缺点,最终选取二阶RC等效电路模型,搭建了仿真模型。该模型很好地表现了电池的输出特性,不仅直观地反映了开路电压(Open Circuit Voltage,OCV)-荷电状态(State of Charge,SOC)特性,更进一步反映了工作电压-荷电状态特性,对电池的SOC在线评估具有的重要作用。

关键词：电池模型电池管理系统荷电状态估计均衡保护