检索结果-南通市图书馆

Polymerizable AEE-active Dye with Optical Activity for Fluorescent Nanoparticles Based on Phenothiazine:Synthesis,Self-assembly and Biological Imaging

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2021年第11期39卷 1431-1440页

作者： Zeng-Fang Huang Ya-li Chen chao-Yue Zhou Yan-Hong li Mei li Xiao-Bo liu liu-Cheng Mao Jin-Ying Yuan Lei Tao Yen Wei School of Materials&Food Engineering Zhongshan InstituteUniversity of Electronic Science&Technology of ChinaZhongshan 528402China School of Materials and Energy University of Electronic Science&Technology of ChinaChengdu 610054China Department of Chemistry the Tsinghua Center for Frontier Polymer ResearchTsinghua UniversityBeijing 100084China

In consideration of various advantages such as less harm,higher sensitivity,and deeper imaging depth,etc.,AIE materials with longwave emission are attracting extensive attention in the fields of vascular visualization,organelle imaging,cells tracker,forensic detection,bioprobe and chemosensor,*** this work,a novel fluorescent(R)-PVHMA monomer with chirality and aggregation-induced emission enhancement(AEE)characteristics was acquired through enzymatic transesterification reaction basing on phenothiazine,and its[α]D2.℃value was about-6.39°with a 3.08 eV bandgap calculated by the quantum ***,a series of PEG-PVH1 and PEG-PVH2.copolymers with chirality feature were achieved through RAFT polymerization of the obtained(R)-PVHMA and PEGMA with various feed *** the feed molar ratio of(R)-PVHMA increased from 2..5%to 2..6%,its actual molar fractions in the PEG-PVH1 and PEG-PVH2.copolymers accordingly increased from 18.1%to 2..7%.The molecular weight of PEG-PVH1 was about 2.2.10^(4) with a narrow PDI,and their kinetics estimation showed a first-order quasilinear *** aqueous solution,the amphiphilic copolymers PEG-PVH could self-assemble into about 100 nm *** a 90%water solution of H_(2.O and THF mixture,the fluorescence intensity had the maximum value,and the emission wavelength presented at 580 and 630 *** investigation of cytotoxicity and cells uptake showed that PEG-PVH FONs performed outstanding biocompatibility and excellent cells absorption effects,which have great potential in bioimaging application.

关键词： AEE dye Optical activity RAFT polymerization Long-wave emission Biological imaging

Structural characteristics and implication on tectonic evolution of the Daerbute strike-slip fault in West Junggar area, NW China

在线全文

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2018年第3期12卷 555-568页

作者： Kongyou WU Yangwen PEI Tianran li Xulong WANG Yin liU Bo liU chao MA School of Geosciences China University of Petroleum Qingdao 266580 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences) Ministry of Education Wuhan 430074 China Xinjiang Oilfield Company PetroChina Karamay 834000 China

The Daerbute fault zone, located in the northwestern margin of the Junggar basin, in the Central Asian Orogenic Belt, is a regional strike-slip fault with a length of 400 km. The NE-SW trending Daerbute fault zone presents a distinct linear trend in plain view, cutting through both the Zair Mountain and the Hala＇alate Mountain. Because of the intense contraction and shearing, the rocks within the fault zone experienced high degree of cataclasis, schistosity, and mylonization, resulting in rocks that are easily eroded to form a valley with a width of 300- 500 m and a depth of 50-100 m after weathering and erosion. The well-exposed outcrops along the Daerbute fault zone present sub-horizontal striations and sub-vertical fault steps, indicating sub-horizontal shearing along the observed fault planes. Flower structures and horizontal drag folds are also observed in both the well-exposed outcrops and high-resolution satellite images. The distribution of accommodating strike-slip splay faults, e.g., the 973-pluton fault and the Great Jurassic Trough fault, are in accordance with the Riedel model of simple shear. The seismic and time-frequency electromagnetic （TFEM） sections also demonstrate the typical strike-slip characteristics of the Daerbute fault zone. Based on detailed field observations of well-exposed outcrops and seismic sections, the Daerbute fault can be subdivided into two segments： the western segment presents multiple fault cores and damage zones, whereas the eastern segment only presents a single fault core, in which the rocks experienced a higher degree of rock cataclasis, schistosity, and mylonization. In the central overlapping portion between the two segments, the sediments within the fault zone are primarily reddish sandstones, conglomerates, and some mudstones, of which the palynological tests suggest middle Permian as the timing of deposition. The deformation timing of the Daerbute fault was estimated by integrating the depocenters＇ basinward migrat

关键词： Daerbute fault structural characteristics deformation timing West Junggar

Amorphous and humidity caking: A review

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 Journal of Chemical Engineering 2019年第6期27卷 1429-1438页

作者： Mingyang Chen Dejiang Zhang Weibing Dong Zhilong Luo chao Kang Haichao li Gang Wang Junbo Gong School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China College of Chemistry and Chemical Engineering QingHai Nationalities UniversityXining 810007China Xi'an Modern Chemistry Research Institute Xi'an 710000China Key Laboratory Modern Drug Delivery and High Efficiency in Tianjin University Tianjin 300072China The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin Tianjin 300072China

Caking of products is a common and undesired phenomenon in food, chemical, pharmaceutical, and fertilizer industries which leads to extra cost and irregular quality. In general, caking processes could be identified as amorphous caking or humidity caking. In this review, history of studying caking, formation, methods, and prospects of these two caking processes are summarized and discussed. The relevant studies from the 192. s to today are mentioned briefly. According to the different properties(i.e. hygrocapacity, hygrosensitivity, mechanical properties, and diffusion behavior) of amorphous powders and crystals, the conditions and mechanisms of amorphous and humidity caking are discussed. It is summarized that glass transition, moisture sorption, quantitative methods characterizing caking, accelerated caking tests, and simulation of caking behaviors are the main aspects that should be studied for a caking process. The methods for these five aspects are reviewed. Potential research points are proposed including caking of mixed particles, caking with phase transition or polymorph transition,non-homogenous caking, and simulation of caking.

关键词： Agglomeration Particle Powder technology Amorphous caking Humidity caking

Study on liquids diffusion into and relevant corrosion behaviour of glass fibre reinforced polymer used in high voltage composite insulator

在线全文

学校读者我要写书评

暂无评论

High Voltage 2020年第1期5卷 53-61页

作者： Yanfeng Gao Xidong liang Weining Bao chao Wu Shaohua li Yingyan liu Yuanji Cai State Grid Jibei Electric Power Co.Ltd Research InstituteNorth China Electric Power Research Institute Co.LtdBeijing100045People's Republic of China Department of Electrical Engineering State Key Lab of Power SystemTsinghua UniversityBeijing100084People's Republic of China Department of Electrical and Computer Engineering University of ConnecticutStorrsConnecticut06269USA

Long-term liquids diffusion tests were performed on glass fibre reinforced polymer(GFRP)used in high voltage composite *** plate-shaped GFRP specimens were immersed in three types of liquids,which high voltage composite insulator would encounter in practice,including deionised water,NaCl solution and nitric acid solution for a period of 4000 *** reaction and physical dissolution complicated the diffusion processes,which could be divided into three types based on the features of diffusion *** transform infrared spectroscopy,scanning electron microscopy and optical interferometry were employed to investigate the chemical property,two-dimensional(2.)and 3D surface morphologies of *** results revealed that the surface layer of GFRP was destroyed to some extent depending on the type and concentration of the liquid,the maximum of profile height deviation of GFRP surface was proposed to evaluate the extent of the corrosion of GFRP,the greater the profile height deviation,the more serious the corrosion of *** present work is helpful for a better understanding of the diffusion behaviour of liquids into GFRP used in high voltage composite insulator as well as in other industry applications.

关键词： corrosion diffusion composite

Influence of Ca treatment on particle-microstructure relationship in heat-affected zone of shipbuilding steel with Zr-Ti deoxidation after high-heat-input welding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第8期29卷 1291-1298页

作者： Hong-bo liu Ju Kang Xiu-juan Zhao Cai-dong Zhang Zhang-guo lin Hong-yong Yao Zhi-qiang Tian Zhan-li liu Jie li chao li Technology Research Institute HBIS GroupShijiazhuang 050023HebeiChina Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil and Gas Development Beijing Institute of Petrochemical TechnologyBeijing 102617China Department of Material Engineering Hebei Vocational University of Industry and TechnologyShijiazhuang 050091HebeiChina HBIS Company limited Shijiazhuang 050023HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China HBIS Group Shisteel Company Shijiazhuang 050031HebeiChina

The effects of Ca treatment on the particle, microstructure, and toughness of heat-affected zone (HAZ) of shipbuilding steel with Zr-Ti deoxidation after high-heat-input welding were investigated. The simulated welding at a high-heat-input welding of 2.0 kJ/cm was carried out using Gleeble-3800 welding simulation. Then, particle characteristics were characterized using an Aztec-Feature automatic particle analysis system. Additionally, an in-situ observation experiment was performed to study the relationships between particle and microstructure by high-temperature confocal laser scanning microscopy (HT-CLSM). The results indicated that the average HAZ toughness at -40 ℃ was increased from 183 to 2.0 J by adding 0.002. wt.% Ca. Meanwhile, the formation of acicular ferrite ratio was increased from 49.34% to 60.2.% due to the addition of Ca. The scanning electron microscopy results clearly showed that CaO-Al_(2.O_(3)-TiOx-ZrO_(2.-MnS particles could act as effective nucleation sites for the formation of acicular ferrite, which has been verified by the observation of the particle-microstructure relationship under HT-CLSM. Furthermore, particle characterization results show that the cumulative frequency of particles with the size of 1-3 lm was 33.2. in HAZ of Zr-Ti shipbuilding steel but 66.2. in HAZ of Zr-Ti-Ca shipbuilding steel.

关键词： Shipbuilding steel Heat-affected zone Impact toughness Microstructure Particle characterization

乙炔抑制法对农田土壤反硝化潜势不确定性的量化

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国环境科学 2024年第10期44卷 5733-5742页

作者：曹文超王娅静李艳青潘好芹赵飞肖万里王翠翠王敬国宋贺潍坊科技学院山东省高校设施园艺实验室山东寿光262700 寿光蔬菜产业控股集团有限公司山东寿光261000 河北农业大学资源与环境科学学院河北保定071000 中国农业大学资源与环境学院北京100193 安徽农业大学农学院安徽合肥230036

通过利用Robot培养系统进行厌氧泥浆培养试验,旨在明确乙炔抑制法在定量设施菜田与粮田土壤实际的反硝化潜势时是否均存在低估现象.以寿光地区设施菜田土壤与相邻粮田土壤为研究对象,分别设置了添加10%乙炔和未添加10%乙炔处理.结果表明... 详细信息

通过利用Robot培养系统进行厌氧泥浆培养试验,旨在明确乙炔抑制法在定量设施菜田与粮田土壤实际的反硝化潜势时是否均存在低估现象.以寿光地区设施菜田土壤与相邻粮田土壤为研究对象,分别设置了添加10%乙炔和未添加10%乙炔处理.结果表明,厌氧泥浆培养3h后,设施菜田与粮田土壤在10%乙炔处理中的N_(2.O累积浓度均显著高于未添加乙炔处理,而N_(2.累积浓度呈现相反趋势;在10%乙炔下,设施菜田和粮田土壤在厌氧培养63h内分别有7.92.和34.2.的N_(2.O被还原为N_(2.;添加10%乙炔设施菜田与粮田土壤实际的反硝化潜势均显著增加,但并未显著影响土壤的呼吸作用;由乙炔抑制法对土壤实际的反硝化潜势计算的偏差(AIT-bias)来看,乙炔抑制法高估设施菜田土壤实际的反硝化潜势比例为2..0%,而对粮田土壤低估了11.4%.综合来看,在设施菜田与粮田土壤中,乙炔抑制法均未完全抑制N_(2.O还原为N_(2.;乙炔抑制法对土壤实际反硝化潜势的不确定性受种植系统的深刻影响,这可能与不同种植系统下土壤养分、土壤类型等因素存在差异有关,需要进一步评估该方法在不同土壤条件下的准确性.

关键词：乙炔抑制法反硝化潜势氮气(N_(2.) 氧化亚氮(N_(2.O) N_(2./(N_(2.O+N_(2.) 自动采样与分析系统

Computer-aided ionic liquid design for alkane/cycloalkane extractive distillation process

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2019年第2期4卷 154-165页

作者： Zhen Song Xinxin li He chao Fan Mo Teng Zhou Hongye Cheng lifang Chen Zhiwen Qi State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Process Systems Engineering Max Planck Institute for Dynamics of Complex Technical Systems

A computer-aided ionic liquid design(CAILD) study is presented for the frequently encountered alkane/cycloalkane separations in petrochemical industry. Exhaustive experimental data are first collected to extend the UNIFAC-IL model for this system, where the proximity effect in alkanes and cycloalkanes is considered specifically by defining distinct groups. The thermodynamic performances of a large number of ILs for 4 different alkane/cycloalkane systems are then compared to select a representative example of such separations. By applying n-heptane/methylcyclohexane extractive distillation as a case study, the CAILD task is cast as a mixed-integer nonlinear programming(MINLP) problem based on the obtained task-specific UNIFAC-IL model and two semi-empirical models for IL physical properties. The top 5 IL candidates determined by solving the MINLP problem are subsequently introduced into Aspen Plus for process simulation and economic analysis, which finally identify 1-hexadecyl-methylpiperidinium tricyanomethane([C_(16)MPip][C(CN)_3]) as the best entrainer for this separation.

关键词： CAILD Alkane/cycloalkane extractive distillation UNIFAC-IL MINLP Process performance and economics

Driving forces and their interactions of soil erosion in soil and water conservation regionalization at the county scale with a high cultivation rate

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第9期20卷 2502-2518页

作者： LUO Bang-lin li Jiang-wen GONG Chun-ming ZHONG Shou-qin WEI chao-fu College of Resources and Environment Southwest UniversityChongqing 400716China Key Laboratory of Eco-environment in Three Gorges Region(Ministry of Education) Southwest UniversityChongqing 400716China Chongqing Water Conservancy&Electric Power Construction Survey&Design Research Institute Co. LTDChongqing 401120China Key Laboratory of Arable Land Conservation(Southwestern China) Ministry of AgricultureChongqing 400715China State Cultivation Base of Eco-agriculture for Southwest Mountainous Land Southwest UniversityChongqing 400715China

Soil erosion control based on county scale Soil and Water Conservation Regionalization(SWCR)is an essential component of China's ecological civilization *** SWCR,the quantitative analysis of the spatial heterogeneity and driving factors of soil erosion among different regions is still *** is of great significance for soil erosion control to deeply examine the factors contributing to soil erosion(natural,land use,and socioeconomic factors)and their interaction at the county and regional *** study focused on a highly cultivated area,Hechuan District of Chongqing in the Sichuan *** district(with 30 townships)was divided into four soil and water conservation regions(Ⅰ-Ⅳ)using principal component and hierarchical cluster *** driving factors of soil erosion were identified using the geographical detector *** results showed thatⅰ)the high cultivation rate was a prominent factor of soil erosion,and the sloping farmland accounted for 78.4%of the soil erosion in the study area;ⅱ)land use factors demonstrated the highest explanatory power in soil erosion,and the average interaction of land use factors explained 60.1%of soil erosion in the study area;ⅲ)the interaction between natural factors,socioeconomic factors,and land use factors greatly contributes to regional soil erosion through nonlinear-enhancement of double-factor *** study highlights the importance of giving special attention to the effects of land use factors on soil erosion at the county scale,particularly in mountainous and hilly areas with extensive sloping farmland and a high cultivation rate.

关键词： Soil and Water Conservation Regionalization Driving factors Soil erosion Geographical detector model Spatial heterogeneity

Nebulized Mycobacterium vaccae protects against asthma by attenuating the imbalance of IRF4/IRF8 expression in dendritic cells

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2022年第12期12卷 520-529页

作者： Qi-Xiang Sun Si-Yue Xu Lao-Dong li Huan Xiao Qian-Nan Zhang chao-Qian li Department of Respiratory Medicine The First Affiliated Hospital of Guangxi Medical UniversityNanningChina

Objective:To assess the effects of nebulized inhaled Mycobacterium vaccae on allergic airway inflammation,airway hyperresponsiveness,and Th1/Th2.cell imbalance in mice with ovalbumin(OVA)-induced ***:Mice received OVA sensitization and challenge for establishment of the asthmatic *** intervention,mice received Mycobacterium vaccae nebulization once every other day from the first day of sensitization to the day before *** challenge,pulmonary histological analysis and airway responsiveness measurement were *** addition,Th1/Th2.cytokines and OVA-specific IgE levels in bronchoalveolar lavage fluid were measured by ***1/Th2.subset ratios and the expression of interferon-regulatory factor 4(IRF4),IRF8 and Toll-like receptor 4(TLR4)in dendritic cells were evaluated by flow ***:Severe inflammatory infiltration and airway hyperresponsiveness were observed in OVA-induced asthmatic *** mice showed higher Th2.cytokine concentration and increased percentage of Th2.cells,along with lower Th1 cytokine concentration and reduced percentage of Th1 cells compared with the normal ***,an imbalance of IRF4^(+)and IRF8^(+)in dendritic cells was found in asthmatic *** inhaled Mycobacterium vaccae reduced airway hyperresponsiveness and inflammation in OVA-induced asthmatic *** addition,nebulized inhaled Mycobacterium vaccae enhanced TLR4 and IRF8 expression,and alleviated the imbalance of Th1/Th2.as well as IRF4^(+)and IRF8^(+)in dendritic ***:Nebulized inhaled Mycobacterium vaccae protects against asthma by alleviating the imbalance of Th1/Th2.and IRF4/IRF8 in OVA-induced asthmatic mice.

关键词： Mycobacterium vaccae Asthma Nebulization IRF4 IRF8 TLR4