检索结果-南通市图书馆

Nano Research 2022年第12期15卷 10070-10077页

作者： meng-Ke Hu Ning wang Dong-Dong Ma Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences(CAS)Fuzhou350002China College of Chemistry Fuzhou UniversityFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China

Heterogenized phthalocyanine-based molecular catalysts are the ideal electrocatalytic platforms for CO_(2)reduction reaction(CO_(2)RR)because of their well-defined structures and potential *** addition to the pursuit of catalytic performances at industrial potentials,it is equally important to explore experimental rules and design considerations behind activity and ***,we successfully developed a series of nickel phthalocyanines(NiPcs)with different alkyl chains immobilized on multi-walled carbon nanotubes(CNT)to unveil the structure-performance relationship for electrocatalytic CO_(2)RR in neutral ***,a volcano-type trend was found between the activity for CO_(2)-to-CO conversion and alkyl chain lengths of NiPcs on *** results further indicate that their electrocatalytic CO_(2)RR activities are highly related to the molecular dispersion and the heterointerfacial charge transfer capability adjusted by the alkyl ***,the optimized electrocatalyst via accurate clipping at the molecular level exhibits an ultrahigh activity with Faradaic efficiency of CO up to 99.52%.

关键词： nickel phthalocyanines carbon nanotubes CO_(2)reduction reaction alkyl chains structure-performance relationship

社会第三方参与长期护理保险监管的必要性和可行性探讨

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

中国初级卫生保健 2024年第3期38卷 1-4页

作者：汪梦陈晓丽王鹏飞刘馨雅王颖复旦大学附属眼耳鼻喉科医院人力资源部上海200031 复旦大学公共卫生学院/国家卫生健康委员会卫生技术评估重点实验室/公共卫生安全教育部重点实验室上海200032

目的:探讨引入社会第三方参与长期护理保险(以下简称长护险)监管环节的必要性与可行性。方法:利用文献归纳分析、横断面调查等方法,明确我国社会第三方参与长护险监管的政策背景、现状及模式等。结果:国家及地方政策均号召探索引入社会... 详细信息

目的:探讨引入社会第三方参与长期护理保险(以下简称长护险)监管环节的必要性与可行性。方法:利用文献归纳分析、横断面调查等方法,明确我国社会第三方参与长护险监管的政策背景、现状及模式等。结果:国家及地方政策均号召探索引入社会第三方参与长护险监管,以缓解政府监管人力不足的压力。同时,多地探索出了不同的第三方参与长护险监管模式并取得了一定的成效,结合可借鉴的国际相关经验,社会第三方参与长护险监管势在必行并具备一定的可行性。结论:引入社会第三方参与长护险监管势在必行,且多地已经探索形成了不同的第三方参与监管模式并取得了成效,提示第三方力量参与长护险全程或部分环节的监管具备可行性。

关键词：长期护理保险监管第三方参与

Silicon-based four-mode division multiplexing for chip-scale optical data transmission in the 2 μm waveband

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第9期7卷 1030-1035页

作者： SHUANG ZHENG meng HUANG XIAOPING CAO LULU wang ZHENGSEN RUAN LI SHEN JIAN wang Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology

Based on a silicon platform, we design and fabricate a four-mode division(de)multiplexer for chip-scale optical data transmission in the 2 μm waveband for the first time, to the best of our knowledge. The(de)multiplexer is composed of three tapered directional couplers for both mode multiplexing and demultiplexing processes. In the experiment, the average crosstalk for four channels is measured to be less than-18 dB over a wide wavelength range(70 nm) from 1950 to 2020 nm, and the insertion losses are also assessed. Moreover, we further demonstrate stable 5 Gbit/s direct modulation data transmission through the fabricated silicon photonic devices with nonreturn-to-zero on–off keying signals. The experimental results show clear eye diagrams, and the penalties at a bit error rate of 3.8 × 10-3 are all less than 2.5 dB after on-chip data transmission. The obtained results indicate that the presented silicon four-mode division multiplexer in the mid-infrared wavelength band might be a promising candidate facilitating chip-scale high-speed optical interconnects.

关键词： red Silicon-based four-mode division multiplexing for chip-scale optical data transmission in the 2 m waveband

文明的积淀与历史的风情——评津子围长篇小说《大辽河》

在线全文

学校读者我要写书评

暂无评论

当代作家评论 2024年第3期 109-114页

作者：李耀鹏孟繁华沈阳师范大学中国文化与文学研究所沈阳师范大学

津子围是一位有着鲜明个人风格的作家,他的创作取得了丰硕的成果,他先后发表的《童年书》《口袋里的美国》《十月的土地》等作品都产生了广泛的影响。长篇新作《大辽河》是一部以辽河为题材的小说,是一部地方志,也是一部边地书,它和其... 详细信息

津子围是一位有着鲜明个人风格的作家,他的创作取得了丰硕的成果,他先后发表的《童年书》《口袋里的美国》《十月的土地》等作品都产生了广泛的影响。长篇新作《大辽河》是一部以辽河为题材的小说,是一部地方志,也是一部边地书,它和其他小说共同构建了津子围的小说美学和文学理想。津子围在历史和文学的经纬中再现了古老东方文明的面影,光阴荏苒沧海桑田,那些逝者如斯的千年往事如此愉悦曼妙却不失悲伤惆怅地熙熙而来。

关键词：小说美学文学理想东方文明大辽河地方志个人风格惆怅长篇小说

PM_(2.5)有机提取物经由铁死亡诱导人支气管上皮细胞损伤的研究

在线全文

学校读者我要写书评

暂无评论

环境卫生学杂志 2024年第4期14卷 303-311,361页

作者：王盟盟龙玥含陈圆圆顾雯王超石莹唐宋段链中国疾病预防控制中心环境与人群健康重点实验室/中国疾病预防控制中心环境与健康相关产品安全所北京100021 南京医科大学全球健康中心

目的探讨细颗粒物(PM_(2.5))有机提取物能否诱导人支气管上皮细胞铁死亡。方法通过索氏提取法提取PM_(2.5)中有机物作为受试物,使用BEAS-2B细胞,以0.1%DMSO溶液作为溶剂对照,染毒于不同剂量(2.5、5、10和20μg/mL)的PM_(2.5)有机提取物... 详细信息

目的探讨细颗粒物(PM_(2.5))有机提取物能否诱导人支气管上皮细胞铁死亡。方法通过索氏提取法提取PM_(2.5)中有机物作为受试物,使用BEAS-2B细胞,以0.1%DMSO溶液作为溶剂对照,染毒于不同剂量(2.5、5、10和20μg/mL)的PM_(2.5)有机提取物构建细胞染毒模型;使用铁死亡抑制剂(Ferrostatin-1,Fer-1)构建铁死亡干预模型。通过吸光度法检测PM_(2.5)有机提取物染毒后BEAS-2B细胞存活率、丙二醛(malondialdehyde,MDA)和谷胱甘肽(glutathione,GSH)浓度;通过荧光法检测细胞内Fe2+含量、活性氧(reactive oxygen species,ROS)含量和脂质过氧化物(lipid peroxidation,LPO)含量;通过qRT-PCR方法检测铁死亡相关基因(如GPX4、SLC7A11、ACSL4、FTL和TFRC等)表达。结果与对照组相比,PM_(2.5)有机提取物染毒24 h后,当染毒剂量为10μg/mL时,细胞内Fe2+含量、ROS含量、LPO含量和MDA浓度均出现显著上升;而GSH浓度出现显著下降;qRT-PCR结果显示,细胞暴露于20μg/mL PM_(2.5)有机提取物时,细胞内铁死亡相关基因GPX4显著下调,SLC7A11、ACSL4、FTL和TFRC出现显著性上调。干预实验中,使用铁死亡特异性抑制剂Fer-1干预后上述变化得到明显改善。结论PM_(2.5)有机提取物可能通过诱导细胞铁死亡导致呼吸系统细胞损伤,进而对肺组织产生潜在健康影响。

关键词：细颗粒物(PM_(2.5)) 有机提取物铁死亡人支气管上皮细胞肺损伤

HPMA modified aluminium nitride powder for aqueous tape casting of AlN ceramic substrates

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2023年第9期12卷 1701-1711页

作者： meng Li Jianping Ai Zhengjuan wang Zhenhai Xue Lihong Cheng Guohong Zhou Shiwei wang School of Materials and Mechatronics Jiangxi Science&Technology Normal UniversityNanchang 330038China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Aluminum nitride(AlN)is considered one of the most desirable materials for integrated circuits and electronic packaging ***,raw AlN powder reacts easily with water,forming Al(OH)3 or AlOOH on the surface and hindering the development of an aqueous tape-casting process for preparing AlN ceramic *** this study,hydrolyzed polymaleic anhydride(HPMA)was used to modify AlN powder,which has good water solubility and *** AlN powder was modified with 5 wt%HPMA remained stable in water for at least 90 h under magnetic stirring condition and 24 h under ball milling condition,indicating that HPMA-modified AlN powder has good resistance to *** action mechanism of HPMA is ***,–COOH of the HPMA polymer and the oxide layer on the surface of the AlN powder underwent a dehydration condensation reaction to form a ***,long chains of the polymer further coated the surface of the AlN powder,forming an anti-hydration layer with a thickness of about 7.0 nm on the surface of the AlN *** addition,AlN green sheets were successfully prepared by aqueous tape casting using the HPMA-modified AlN powder without additional ***,AlN ceramic substrates were obtained by sintering at 1750℃for 4 h under an N2 atmosphere with a pressure of 0.2 *** relative density and thermal conductivity were tested to be 97.3%and 122 W/(m·K),respectively.

关键词： aluminum nitride(AlN) surface modification hydrolyzed polymaleic anhydride(HPMA) hydrolysis resistance aqueous tape casting

Novel thioxanthone host material with thermally activated delayed fluorescence for reduced efficiency roll-off of phosphorescent OLEDs

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

Chinese Chemical Letters 2018年第3期29卷 471-474页

作者： Hui wang Xiaopeng Lv Lingqiang meng Xiaofang Wei Ying wang Pengfei wang Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry & Materials Science Northwest University Xi'an 710127 China Key Laboratory of Photochemical Conversion and Optoelectrontc Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Institute of Functional Nano and Soft Materials Soochow University Suzhou 215123 China

2,7-Di（9,9-dimethyl-9H-fluoren-l-yl）-9H-thioxanthen-9-one （DMBFTX） with thermally activated delayed fluorescence （TADF） was well designed and synthesized. The phosphorescent organic lightemitting device （PHOLED） based on this novel TADF host material displays a stable red phosphorescence region, a peak external quantum efficiency （EQE） value of 12.9% and a low EQE roll-off of 38.8%at a luminance of 10000 cd/m2, which is benefited from the reverse intersystem crossing （RISC） of TADF host and less populated triplet exitons. Notably, the red device based on the TADF host DMBFrX exhibits superior electroluminescence performance and reduced efficiency roll-offcompared with the one hosted by commercially available host 1,3-bis（9-carbazolyl）benzene （mCP）, illustrating the high potential of employing the TADF host material with small energy gap to reduce efficiency roll-off in PHOLED.

关键词： Low efficiency roll-off Thermally activated delayed fluorescence Small energy gap Reverse intersystem crossing Phosphorescent OLEDs

Genome-wide recombination variation in biparental segregating and reciprocal backcross populations provides information for introgression breeding in Brassica napus

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2023年第1期11卷 208-219页

作者： meng wang Graham J.King Lei Shi Ruiyuan Li Yi Zhang Xiaohua wang Jinling meng Jinxing Tu Jun Zou National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina Southern Cross Plant Science Southern Cross UniversityPO Box 157LismoreNew South Wales 2480Australia Key Laboratory of Information and Computing Science of Guizhou Province Guizhou Normal UniversityGuiyang 550001GuizhouChina College of Agriculture and Forestry Science Linyi UniversityLinyi 276000ShandongChina

Variation in patterns of recombination in plant genomes provides information about species evolution,genetic diversity and crop improvement. We investigated meiotic crossovers generated in biparental segregating and reciprocal backcross populations of the allopolyploid genome of rapeseed(Brassica napus)(AACC, 2n = 38). A structured set of 1445 intercrossed lines was derived from two homozygous de novo genome-assembled parents that represented the major genetic clusters of semi-winter Chinese and winter European rapeseeds, and was used to increase QTL resolution and achieve genomic reciprocal introgression. A high-density genetic map constructed with 6161 genetic bins and anchored centromere regions was used to establish the pattern of recombination variation in each chromosome. Around 93%of the genome contained crossovers at a mean rate of 3.8 c M Mb^(-1), with the remaining 7% attributed to centromeres or low marker density. Recombination hotspots predominated in the A genome, including two-thirds of those associated with breeding introgression from B. rapa. Genetic background might affect recombination variation. Introgression of genetic diversity from European winter to Chinese semi-winter rapeseed showed an increase in crossover rate under the semi-winter environment. Evidence for an elevated recombination rate having historically contributed to selective trait improvement includes accumulation of favorable alleles for seed oil content on hotspots of chromosome A10. Conversely, strong artificial selection may affect recombination rate variation, as appears to be the case with a coldspot resulting from strong selection for glucosinolate alleles on A09. But the cold region would be promptly reactivated by crossing design indicated by the pedigree analysis. Knowledge of recombination hotspots and coldspots associated with QTL for 22 traits can guide selection strategies for introgression breeding between the two gene pools. These results and rich genomic resources

关键词： Allopolyploid Meiotic crossovers Brassica napus Historical introgression Reciprocal backcross population

常规磁共振成像影像特征在鼻咽癌预后预测中的研究进展

在线全文

学校读者我要写书评

暂无评论

磁共振成像 2024年第8期15卷 218-223页

作者：杨凡林蒙张红梅国家癌症中心/国家肿瘤临床医学研究中心/中国医学科学院北京协和医学院肿瘤医院影像诊断科北京100021

鼻咽癌(nasopharyngeal carcinoma,NPC)是一种起源于鼻咽黏膜柱状上皮的恶性肿瘤。目前,临床上主要根据磁共振成像(magnetic resonance imaging,MRI)上原发肿瘤的侵犯程度以及颈部淋巴结大小和位置来确定患者治疗方案,但仍有约10%~30%... 详细信息

鼻咽癌(nasopharyngeal carcinoma,NPC)是一种起源于鼻咽黏膜柱状上皮的恶性肿瘤。目前,临床上主要根据磁共振成像(magnetic resonance imaging,MRI)上原发肿瘤的侵犯程度以及颈部淋巴结大小和位置来确定患者治疗方案,但仍有约10%~30%患者在治疗后发生疾病进展。目前,多功能MRI技术展现出了比常规MRI技术更好的预后预测性能,但由于常规MRI检查具有分辨率高,稳定性好以及普及性广的特点,其在临床应用中的价值不可忽视。且近年来,多项研究细致探究了NPC颅底结构侵犯情况(如颅底骨质侵犯,软组织浸润等)以及转移淋巴结的其他形态学特征(如包膜外侵,淋巴结坏死等)在NPC预后预测中的价值,且将某些常规MRI特征加入目前第八版分期能够显著提高预测性能。因此,本研究就常规MRI[如T2WI、对比增强T1WI(contrast-enhanced T1WI,CE-T1WI)、弥散加权成像(diffusion weighted imaging,DWI)]的多维度原发灶和淋巴结特征在NPC预后预测中的价值进行综述,以为临床诊疗提供可靠的依据。

关键词：磁共振成像鼻咽癌预后评估诱导化疗淋巴结转移

在线全文

学校读者我要写书评

暂无评论

国家与创新:数字产业创新的政治经济逻辑

东南学术 2024年第4期 76-86页

作者：宋文佳孟天广清华大学政治学系清华大学计算社会科学与国家治理实验室清华大学社会科学学院

数字经济是数字产业创新过程中产生的全新经济形态。回答数字产业如何实现创新这一重要问题,应立足于数字产业自身的新特征和产业创新的新机制。从政治经济视角系统剖析从传统产业到新兴产业的创新过程变迁,可有效解释新兴数字产业创新... 详细信息

数字经济是数字产业创新过程中产生的全新经济形态。回答数字产业如何实现创新这一重要问题,应立足于数字产业自身的新特征和产业创新的新机制。从政治经济视角系统剖析从传统产业到新兴产业的创新过程变迁,可有效解释新兴数字产业创新背后的新型国家-市场关系,以及国家在创新过程中的角色转换。鉴于数字产业创新面临着技术路径与产业目标的双重不确定性,经典的国家-市场关系类型旨在解决技术不确定性带来的激励问题,而“国家形塑市场”这一全新的国家-市场关系模式,可包容数字产业创新过程中的目标不确定性。

关键词：数字产业创新政治经济国家-市场关系