检索结果-南通市图书馆

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： xiaodong yang Haochen Shen xiaoming xiao Zhichao Li Qi Zhou Wei yang Bin Jiang Yongli sun Luhong Zhang Zhenhua Yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

A disputed evidence on obesity:comparison of the effects of Rcan2^(-/-) and Rps6kb1^(-/-) mutations on growth and body weight in C57BL/6J mice

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2016年第9期17卷 657-671页

作者： Jing ZHAO Shi-wei LI Qian-qian GONG Ling-cui DING Ye-cheng JIN Jian ZHANG Jian-gang GAO xiao-yang sun Institute of Developmental Biology School of Life ScienceShandong University

It is widely accepted that body weight and adipose mass are tightly regulated by homeostatic mechanisms, in which leptin plays a critical role through hypothalamic pathways, and obesity is a result of homeostatic disorder. However, in C57BL/6J mice, we found that Rcan2 increases food intake and plays an important role in the develop- ment of age- and diet-induced obesity through a leptin-independent mechanism. RCAN2 was initially identified as a thyroid hormone （T3）-responsive gene in human fibroblasts. Expression of RCAN2 is regulated by T3 through the PI3K-Akt/PKB-mTOR-Rps6kbl signaling pathway. Intriguingly, both Rcan2-/- and Rps6kb1-/- mutations were re- ported to result in lean phenotypes in mice. In this study we compared the effects of these two mutations on growth and body weight in C57BL/6J mice. We observed reduced body weight and lower fat mass in both Rcan2-/- and Rps6kb1-/- mice compared to the wild-type mice, and we reported other differences unique to either the Rcan2-/- or Rps6kb1-/- mice. Firstly, loss of Rcan2 does not directly alter body length; however, Rcan2-/- mice exhibit reduced food intake. In contrast, Rps6kb1-/- mice exhibit abnormal embryonic development, which leads to smaller body size and reduced food intake in adulthood. Secondly, when fed a normal chow diet, Rcan2-/- mice weigh significantly more than Rps6kb1-/- mice, but both Rcan2-/- and Rps6kbl-/- mice develop similar amounts of epididymal fat. On a high-fat diet, Rcan2-/- mice gain body weight and fat mass at slower rates than Rps6kb1-/- mice. Finally, using the double-knockout mice （Rcan2-/- Rps6kb1-/-）, we demonstrate that concurrent loss of Rcan2and Rps6kbl has an additive effect on body weight reduction in C57BL/6J mice. Our data suggest that Rcan2 and Rps6kbl mutations both affect growth and body weight of mice, though likely through different mechanisms.

关键词： Rcan2 gene Rps6kbl gene Growth Body weight regulation Obesity

Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2019年第9期30卷 73-82页

作者： Xing-Yan Liu Yi-Wei yang Rong Liu Jie Wen Zhong-Wei Wen Zi-Jie Han Zhi-Zhou Ren Qi An Huai-Yong Bai Jie Bao Ping Cao Qi-Ping Chen Yong-Hao Chen Pin-Jing Cheng Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Min-Hao Gu Feng-Qin Guo Chang-Cai Han Guo-Zhu He Yong-Cheng He Yue-Feng He Han-Xiong Huang Wei-Ling Huang Xi-Ru Huang xiao-Lu Ji Xu-yang Ji Hao-Yu Jiang Wei Jiang Han-Tao Jing Ling Kang Ming-Tao Kang Bo Li Lun Li Qiang Li xiao Li yang Li yang Li Shu-Bin Liu Guang-Yuan Luan Ying-Lin Ma Chang-Jun Ning Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Hong sun xiao-yang sun Zhi-Jia sun Zhi-Xin Tan Hong-Qing Tang Jing-Yu Tang Peng-Cheng Wang Qi Wang Tao-Feng Wang Yan-Feng Wang Zhao-Hui Wang Zheng Wang Qing-Biao Wu xiao-Guang Wu Xuan Wu Li-Kun Xie Han Yi Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Jing Zhang Lin-Hao Zhang Li-Ying Zhang Qing-Min Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Ying-Tan Zhao Liang Zhou Zu-Ying Zhou Dan-yang Zhu Ke-Jun Zhu Peng Zhu Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics State Key Laboratory of Particle Detection and Electronics Chinese Academy of Sciences(CAS) Department of Modern Physics University of Science and Technology of China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking University Key Laboratory of Nuclear Data China Institute of Atomic Energy Institute of High Energy Physics Chinese Academy of Sciences(CAS) Spallation Neutron Source Science Center University of South China Northwest Institute of Nuclear Technology Department of Engineering and Applied Physics University of Science and Technology of China Beihang University Xi’an Jiaotong University

To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 20 MeV using the time-of-flight method. The measurement is performed at the Back-n white neutron source with a 76-m time-of-flight path using the China Spallation Neutron Source. A multilayer fast fission chamber with 235U and 238U is employed as the neutron detector. The diameter and thickness of the natural graphite sample are 70 mm and 40 mm, respectively. Signal waveforms are collected using a data acquisition system. Off-line data processing was used to obtain the neutron time-of-flight spectra and transmissions. The uncertainty of the counting statistics is generally approximately 3% for each bin in the energy range of 1–20 MeV. It is determined that the results for the neutron total cross section of carbon obtained using ^235U cells are in good agreement with the results obtained using 238U cells within limits of statistical uncertainty. Moreover, the measured total cross sections show good agreement with the broadening evaluated data.

关键词： CSNS Back-n white neutron source NTOX Neutron total cross section Carbon Multilayer fast fission chamber

miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第1期20卷 277-290页

作者： Meng Cong Jing-Jing Hu Yan Yu xiao-Li Li xiao-Ting sun Li-Ting Wang Xia Wu Ling-Jie Zhu xiao-Jia yang Qian-Ru He Fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

气候变化背景下中国主要作物农业气象灾害时空分布特征(Ⅱ):西北主要粮食作物干旱

在线全文

学校读者我要写书评

暂无评论

中国农业气象 2017年第1期38卷 31-41页

作者：何斌刘志娟杨晓光孙爽中国农业大学资源与环境学院北京100193

基于中国西北地区1961-2010年149个气象站点逐日气象资料及春小麦、春玉米和夏玉米生育期资料,采用作物水分亏缺指数(CWDI)为作物干旱指标,明确了研究区域内3种作物干旱的空间分布特征和时间演变规律。研究结果表明:(1)3种作物生长季内... 详细信息

基于中国西北地区1961-2010年149个气象站点逐日气象资料及春小麦、春玉米和夏玉米生育期资料,采用作物水分亏缺指数(CWDI)为作物干旱指标,明确了研究区域内3种作物干旱的空间分布特征和时间演变规律。研究结果表明:(1)3种作物生长季内及各生育阶段,干旱发生频繁,尤以特旱和重旱发生范围广、频率高,轻旱和中旱多发生在研究区域东部,甘肃南部和陕西南部等个别地区干旱发生频率相对较小。(2)春小麦生长季内干旱发生站次比为79.1%,春玉米生长季内干旱发生站次比为84.5%,夏玉米干旱发生站次比为77.4%;夏玉米生长季内站次比波动较小,春小麦和春玉米波动较大。总体而言,研究时段内春小麦生长期干旱发生站次比呈减小趋势,降幅为每10a减少0.55个百分点,春玉米和夏玉米干旱站次比呈增加趋势,增幅分别为每10a增加0.24个百分点和0.20个百分点。(3)研究区域东部春小麦和春玉米各生育阶段干旱强度呈增加趋势,西部呈下降趋势;夏玉米干旱强度在陕西北部、宁夏和河西走廊呈增加趋势,其它地区多为降低趋势。

关键词：作物水分亏缺指数站次比干旱强度

Recent Advances in Fibrous Materials for Hydroelectricity Generation

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo Xu xiao Feng Xing yang Zheheng Song Yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe sun Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

苹果原花青素对小鼠运动能力和抗氧化能力的影响

在线全文

学校读者我要写书评

暂无评论

动物医学进展 2017年第6期38卷 57-60页

作者：陈晓龙孙阳杨新林广西工业职业技术学院基础教学部广西南宁530001 重庆医科大学体育工作部重庆400010 西北农林科技大学体育部陕西杨凌712100

为研究苹果中原花青素对小鼠运动能力和抗氧化能力的影响,选取5周龄健康雄性小鼠45只,随机分为3组,进行3周适应性游泳训练。小鼠运动结束后,通过轻度麻醉条件下采集血液和肌组织,检测血清中乳酸(LD)和丙二醛(MDA)含量,以及测定超氧化物... 详细信息

为研究苹果中原花青素对小鼠运动能力和抗氧化能力的影响,选取5周龄健康雄性小鼠45只,随机分为3组,进行3周适应性游泳训练。小鼠运动结束后,通过轻度麻醉条件下采集血液和肌组织,检测血清中乳酸(LD)和丙二醛(MDA)含量,以及测定超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活力。结果表明,各组小鼠的初始体重对比无显著差异(P>0.05);运动对照组和试验组小鼠的游泳至力竭的时间明显长于安静对照组;与运动对照组相比,试验组小鼠的游泳至力竭的时间也呈现明显的延长趋势(P<0.05)。游泳运动以后,运动对照组和试验组小鼠血清和肌组织中LD和MDA含量明显低于安静对照组;与运动对照组相比,试验组小鼠的血清LD和MDA含量也呈现明显下降趋势(P<0.05)。另外,运动对照组和试验组小鼠SOD和CAT活性明显高于安静对照组,且与运动对照组相比,试验组SOD和CAT活性显著升高(P<0.05)。说明苹果原花青素能提高小鼠运动能力和抗氧化能力,且与有氧运动相结合能够产生协同效应,具有较好的应用前景。

关键词：苹果原花青素运动能力抗氧化能力小鼠

远距离数字离轴全息中基于图像指标优化的相位误差校正方法

在线全文

学校读者我要写书评

暂无评论

激光杂志 2017年第4期38卷 96-100页

作者：杨旭陈波李小阳孙天齐华北理工大学电气工程学院河北唐山063009

针对远距离数字离轴全息中的相位误差,实验研究了基于SPGD算法的多帧平均校正方法。建立了数字离轴全息实验装置,首先采用扫描法校正离焦相位误差,然后采用SPGD算法校正每帧的高阶相位误差;在此基础上,先采用目标图像相关法确定并粗校... 详细信息

针对远距离数字离轴全息中的相位误差,实验研究了基于SPGD算法的多帧平均校正方法。建立了数字离轴全息实验装置,首先采用扫描法校正离焦相位误差,然后采用SPGD算法校正每帧的高阶相位误差;在此基础上,先采用目标图像相关法确定并粗校正帧与帧之间的倾斜相位误差,然后采用SPGD算法进一步校正帧间的倾斜和高阶相位误差。实验结果表明,本文提出的方法能够有效校正远距离数字离轴全息相位误差;与目前的校正方法相比,该方法校正速度更快、精度更高,更适合于对运动目标成像。

关键词：全息相位校正 SPGD算法多帧平均

Optimal entry points and trajectories for anterior C1 lateral mass screw

在线全文

学校读者我要写书评

暂无评论

Optimal entry points and trajectories for anterior C1 latera...