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Side-Chain-Functionalized Poly(indacenodithiophene-alt-benzothiadizole)s as Stretchable High-Mobility Semiconductors with Improved Elasticity

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MACROMOLECULES 2024年第2期57卷 528-538页

作者： zhao, Bin Pei, Dandan Shi, Yibo Zhang, xuwen Zhang, Bo Deng, Yunfeng Han, Yang Geng, Yanhou Tianjin Univ Collaborat Innovat Ctr Chem Sci & Engn Tianjin Sch Mat Sci & Engn Tianjin 300072 Peoples R China Tianjin Univ Tianjin Key Lab Mol Optoelect Sci Tianjin 300072 Peoples R China Collaborat Innovat Ctr Chem Sci & Engn Tianjin Tianjin 300072 Peoples R China BOE Technol Grp Co Ltd BOE Technol Innovat Ctr Beijing 100176 Peoples R China Tianjin Univ Joint Sch Natl Univ Singapore Int Campus Fuzhou 350207 Peoples R China Tianjin Univ Int Campus Fuzhou 350207 Peoples R China

To regulate the mechanical properties of poly(indacenodithiophene-alt-benzothiadizole) (IDT-BT), a high-mobility polymer semiconductor with high ductility but inferior elasticity (plastic deformation onset strain (PdOS) < 10%), triisopropylsilyl (TIPS), hydroxyl (OH), and 2-ureido-4[1H]-pyrimidone (UPy) groups were introduced into its side chain ends. The incorporation of bulky and neutral TIPS groups led to slightly increased ductility but had no obvious influence on the elasticity of the polymer. The presence of OH groups resulted in enhanced elasticity without sacrificing ductility. However, high-content (20 mol %) OH-functionalized side chains were necessary to improve PdOS to above 30% due to the weak and dynamic nature of formed hydrogen bonds. In contrast, incorporating a small amount of UPy groups, capable of forming strong quadruple hydrogen bonds, in side chains could significantly improve the elasticity of the polymer. A PdOS of above 40%, along with a crack onset strain of similar to 100% and decent hole mobility of similar to 0.6 cm(2) V(-1)s(-1), was demonstrated for polymer UPy-5% that contained 5 mol % UPy-functionalized side chains. Because of excellent elasticity, UPy-5% films displayed stable mobility against cyclic stretching, releasing up to 500 cycles at a tensile strain of 30%.

关键词： Deformation Elasticity Nucleic acid structure Polymers Thin films

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不同摄食状态罗非鱼养殖水体微生物群落功能多样性初探

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中国农学通报 2018年第5期34卷 147-152页

作者：史磊磊范立民陈家长邴旭文赵志祥胡庚东吴伟南京农业大学无锡渔业学院江苏无锡214081 中国水产科学研究院淡水渔业研究中心/农业部长江下游渔业生态环境监测中心/农业部淡水鱼类遗传育种和养殖生物学重点开放实验室江苏无锡214081

旨在研究不同摄食状态罗非鱼养殖水体微生物群落功能多样性差异。利用Biolog技术对不同摄食状态下罗非鱼养殖水体微生物群落对六大类碳源利用情况及其微生物群落功能多样性与环境因子间的关系进行研究。结果显示:不同摄食状态罗非鱼养... 详细信息

旨在研究不同摄食状态罗非鱼养殖水体微生物群落功能多样性差异。利用Biolog技术对不同摄食状态下罗非鱼养殖水体微生物群落对六大类碳源利用情况及其微生物群落功能多样性与环境因子间的关系进行研究。结果显示:不同摄食状态罗非鱼养殖水体微生物对醇类和胺类的利用强度均存在显著性差异,对其他类碳源利用情况基本相同;RDA分析表明,NH_4^+-N、NO_2^--N、NO_3^--N是影响不同摄食状态罗非鱼养殖水体微生物群落功能多样性差异的主要因素。结果表明:不同摄食状态的罗非鱼养殖水体微生物群落功能多样性存在一定差异。

关键词：摄食状态微生物群落功能多样性 Biolog

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Sedimentary organic and inorganic records of eutrophication and hypoxia in and off the Changjiang Estuary over the last century

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MARINE POLLUTION BULLETIN 2015年第1-2期99卷 76-84页

作者： zhao, Jun Feng, xuwen Shi, Xiaolai Bai, Youcheng Yu, Xiaoguo Shi, Xuefa Zhang, Weiyan Zhang, Rongping State Ocean Adm Inst Oceanog 2 Hangzhou 310012 Zhejiang Peoples R China SOA Key Lab Marine Ecosyst & Biogeochem Hangzhou 310012 Zhejiang Peoples R China SOA Key Lab Submarine Geosci Hangzhou 310012 Zhejiang Peoples R China SOA Inst Oceanog 1 Key Lab Marine Sedimentol & Environm Geol Qingdao 266061 Peoples R China Ocean Univ China Minist Educ Key Lab Marine Chem Theory & Technol Qingdao 266100 Peoples R China

Organic and inorganic sedimentary parameters in and off the Changjiang Estuary have been analyzed to reconstruct historical trends in eutrophication and hypoxia over the last century. The lipid biomarker concentrations in the Changjiang Estuary mud area,(CEMA) indicated eutrophication accelerated after the 1970s. Meanwhile, Mo/Al indicated hypoxia has increased since 1960s. Eutrophication and hypoxia in the CEMA are primarily a result of the dramatically increased load of terrestrial nutrients from the Changjiang to the East China Sea. The lipid biomarker concentrations in the southwest Cheju Island mud area (SCIMA) showed primary production is controlled mainly by changes in regional climate and marine current. No significant hypoxia occurred in the SCIMA over the past century as indicated by Mo/Al. Therefore, geochemical indicators of eutrophication and hypoxia revealed different patterns between the CEMA and SCIMA, suggesting the role of river-derived nutrients in sustaining eutrophication and hypoxia in the CEMA since the 1960s. (C) 2015 Elsevier Ltd. All rights reserved.

关键词： Changjiang Estuary Eutrophication Hypoxia Biomarker Redox sensitive element Sediments

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Cardiovascular toxicity in antitumor therapy: biological and therapeutic insights

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TRENDS IN CANCER 2024年第10期10卷 920-934页

作者： Lin, xuwen Ma, Xidong zhao, Sheng Yao, Jie Han, Leng Jing, Ying Xue, Xinying Capital Med Univ Beijing Shijitan Hosp Emergency & Crit Care Med Ctr Dept Resp & Crit Care Beijing Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Fuwai Hosp Natl Ctr Cardiovasc Dis State Key Lab Cardiovasc DisDept Cardiol Beijing Peoples R China Shandong Second Med Univ Dept Resp & Crit Care Weifang Peoples R China Indiana Univ Brown Ctr Immunotherapy Sch Med Indianapolis IN 46202 USA Indiana Univ Sch Med Dept Biostat & Hlth Data Sci Indianapolis IN 46202 USA Fudan Univ Greater Bay Area Inst Precis Med Guangzhou Ctr Intelligent Med Res Sch Life Sci Guangzhou Peoples R China

The evolution of antitumor therapies has significantly improved cancer prognosis but has concurrently resulted in cardiovascular toxicities. Understanding the biological mechanisms behind these toxicities is crucial for effective management. Immunotherapy-related cardiovascular toxicities are primarily mediated by immune cells and secreted cytokines. Chemotherapy may cause cardiovascular damage through autophagy disruption and mitochondrial dysfunction. Targeted therapies can induce toxicity through endothelin-1 (ET-1) production and cardiac signaling disruption. Radiotherapy may lead to cardiomyopathy and myocardial fibrosis by affecting endothelial cells, triggering inflammatory responses and accelerating atherosclerosis. This review provides insights into these mechanisms and strategies, aiming to enhance the clinical prevention and treatment of cardiovascular toxicities.

关键词： cardiovascular toxicities immunotherapy chemotherapy radiotherapy targeted therapy biological mechanisms

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Resource engineering practice of mine water

Resource engineering practice of mine water

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作者： zhao, Shuguang Li, Fuqin He, xuwen School of Chemical and Environmental Engineering China University of Mining Technology Beijing 100083 China School of City Construction Hebei University of Engineering Handan 056038 China

ISBN: (纸本)9783860090664

The design parameters and the operational aspects of mine water disposal project in Fengxi Xinyu coal mine were introduced. The primary disposal process included neutralization, coagulation settling and mechanical filtration process, and reverse osmosis (RO) process for desalination were used to treat mine water with high-turbidity, high-hardness and high-salinity. The results showed that the pretreated mine water could be used for washing coal, and the quality of permeate liquid of RO for water with milk excelled the national standards for drinking water. New water source was supplied to the coal mine, the recycle of mine water was resource engineering practice.

关键词： Coagulation

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Optimization of image reconstruction method for dual-particle time-encode imager through adaptive response correction

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NUCLEAR ENGINEERING AND TECHNOLOGY 2023年第5期55卷 1587-1592页

作者： zhao, Dong Jia, Wenbao Hei, Daqian Cheng, Can Cheng, Wei Liang, xuwen Li, Ji Nanjing Univ Aeronaut & Astronaut Dept Nucl Sci & Technol Nanjing 211106 Peoples R China Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China Collaborat Innovat Ctr Radiat Med Jiangsu Higher E Suzhou 215000 Peoples R China Nucl Power Inst China Chengdu 610041 Peoples R China

Time-encoded imagers (TEI) are important class of instruments to search for potential radioactive sources to prevent illicit transportation and trafficking of nuclear materials and other radioactive sources. The energy of the radiation cannot be known in advance due to the type and shielding of source is unknown in practice. However, the response function of the time-encoded imagers is related to the energy of neutrons or gamma-rays. An improved image reconstruction method based on MLEM was proposed to correct for the energy induced response difference. In this method, the count vector versus time was first smoothed. Then, the preset response function was adaptively corrected according to the measured counts. Finally, the smoothed count vector and corrected response were used in MLEM to reconstruct the source distribution. A one-dimensional dual-particle time-encode imager was developed and used to verify the improved method through imaging an Am -Be neutron source. The improvement of this method was demonstrated by the image reconstruction results. For gamma-ray and neutron images, the angular resolution improved by 17.2% and 7.0%;the contrast-to-noise ratio improved by 58.7% and 14.9%;the signal-to-noise ratio improved by 36.3% and 11.7%, respectively.(c) 2023 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Time -encoded imager Dual -particle imaging Response correction Image reconstruction

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Blended Tea Ameliorates T2DM via Modulation of Gut Microflora

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PLANT FOODS FOR HUMAN NUTRITION 2024年第4期79卷 851-859页

作者： Liu, Sui Dai, Xinyue zhao, Jinqi Zhang, xuwen Zhu, Mingzhi Wang, Kunbo Fu, Donghe Hunan Agr Univ Key Lab Tea Sci Minist Educ Changsha 410128 Hunan Peoples R China Hunan Agr Univ Natl Res Ctr Engn Technol Utilizat Funct Ingredien Changsha 410128 Hunan Peoples R China Hunan Agr Univ Coinnovat Ctr Educ Minist Utilizat Bot Funct Ingredients Changsha 410128 Hunan Peoples R China Hunan Agr Univ Key Lab Evaluat & Utilizat Gene Resources Hort Cro Minist Agr & Rural Affairs China Changsha 410128 Hunan Peoples R China

Increasing evidences suggest that type 2 diabetes mellitus (T2DM) is closely related to gut microflora dysbiosis, which can be improved by dietary intervention. Four natural plant products, including Cyclocarya paliurus, Fu brick tea, Ampelopsis grossedentata, and Lithocarpus litseifolius, were blended to form a blended tea product for obtaining the better flavor. The blended tea was also expected to have excellent pharmacological activity. Therefore, the ameliorative effect of blended tea on T2DM and underlying mechanisms were studied in this study. The results showed that the blended tea extract effectively attenuated the symptoms of glucose and lipid metabolism-related disorders in T2DM mice fed by high-fat and high-sucrose diet. Furthermore, blended tea extract intervention significantly attenuated gut microbiota dysbiosis, the abundance of bacteria such as Bacteroidetes and Firmicutes, which aid in the hydrolysis and utilization of carbohydrates, significantly increased, while the abundance of pathogenic bacteria such as Proteobacteria significantly decreased. Certain core microorganisms involved in energy metabolism, including Ruminococcaceae_UCG-005, Butyricimonas, Roseburia, Oscillibacter, [Eubacterium]_nodatum_group, Muribaculaceae, Prevotellaceae UCG 001, were also found to be improved by blended tea extract. Collectively, our results demonstrated that the blended tea may ameliorate T2DM through modulation of gut microflora. The blended tea may serve as novel functional drink for the treatment of T2DM and dysbiosis of gut microbiota.

关键词： Blended tea(1) T2DM(2) Gut microflora(3) Gut Microflora dysbiosis(4)

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ANALYSIS AND VALIDATION OF A UNIFIED SLIP FACTOR MODEL FOR IMPELLERS AT DESIGN AND OFF-DESIGN CONDITIONS

ANALYSIS AND VALIDATION OF A UNIFIED SLIP FACTOR MODEL FOR I...

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ASME Turbo Expo 2010

作者： Qiu, xuwen Japikse, David zhao, Jinhui Anderson, Mark R. Concepts NREC White River Jct VT 05001 USA

ISBN: (纸本)9780791844021

This paper presents a unified slip model for axial, radial, and mixed-flow impellers. The core assumption of the model is that the flow deviation or slip velocity at impeller exit is mainly originated from the blade loading near the discharge of an impeller and its subsequent relative eddy in the impeller passage. The blade loading is estimated and then used to derive the slip velocity using Stodola's assumption. The final form of the slip factor model can be successfully related to Carter's rule [1] for axial impellers and Stodola's [2] slip model for radial impellers, making the case for this model to be applicable to axial, radial, and mixed-flow impellers. Unlike conventional slip factor models for radial impellers, the new slip model suggests that the flow coefficient at the impeller exit is an important variable for the slip factor when there is significant blade turning at the impeller discharge. This explains the interesting off-design trends for slip factor observed from experiments, such as the rise of the slip factor with flow coefficient in the Eckardt A impeller [3]. Extensive validation results for this new model are presented in this paper. Several cases are studied in detail to demonstrate how this new model can capture the slip factor variation at the off-design conditions. Furthermore, a large number of test data from more than 90 different compressors, pumps, and blowers were collected. Most cases are radial impellers, but a few axial impellers are also included. The test data and model predictions of the slip factor are compared at both design and off-design flow conditions. In total, over 1,650 different flow conditions are evaluated. The unified model shows a clear advantage over the traditional slip factor correlations, such as the Busemann-Wiesner model [4], when off-design conditions are considered.

关键词： Flow (Dynamics) Blades Design Eddies (Fluid dynamics) Compressors Impellers Pumps

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Ultraflexible Reedlike Carbon Nanofiber Membranes Decorated with Ni-Co-S Nanosheets and Fe2O3-C Core-Shell Nanoneedle Arrays as Electrodes of Flexible Quasi-Solid-State Asymmetric Supercapacitors

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ACS APPLIED ENERGY MATERIALS 2021年第2期4卷 1505-1516页

作者： Zhang, Ming Wu, xuwen Yang, Dongzhi Qin, Liyuan Zhang, Shiyi Xu, Ting zhao, Tianyu Yu, Zhong-Zhen Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Coll Mat Sci & Engn Beijing 100029 Peoples R China Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Coll Mat Sci & Engn Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci & Engn Beijing 100029 Peoples R China

Flexible and lightweight supercapacitors with satisfactory energy density and long-term stability are urgently required to provide power for flexible, foldable, and wearable electronic devices. Herein, reedlike carbon nanofibers (RCNFs) with hierarchical macropores in the core and micropores and honeycomb mesopores in the shell are designed by electrospinning, carbonization, and etching, leading to high electronic conductivity and satisfactory mechanical flexibility and foldability. Subsequently, flowerlike Ni-Co-S nanoarrays are grown in situ on RCNFs by electrodeposition, and fern leaf-like Fe2O3-C core-shell nanoneedles, in which porous Fe2O3 are coated with ultrathin carbon layers, are decorated on RCNFs via hydrothermal synthesis, polydopamine modification, and thermal annealing. Because of unique core-shell structures and synergistic effects of these active components, the RCNF@ Ni-Co-S cathode and the RCNF@Fe2O3-C anode exhibit high specific capacitances of 1728 and 221.5 F g(-1) at 1 A g(-1), respectively. With a poly(vinyl alcohol) (PVA)/potassium hydroxide (KOH) solid gel as both an electrolyte and a separator, the assembled flexible quasi-solid-state asymmetric supercapacitor achieves a high energy density of 44.9 W h kg(-1) at 1549.7 W kg(-1), and the capacitance remains at 94% after bending the asymmetric supercapacitor to 180 degrees. The flexible electrodes with excellent electrochemical performances are highly promising for high-performance wearable energy storage devices.

关键词： electrospinning asymmetric supercapacitors carbon nanofibers Ni-Co-S nanosheets Fe2O3-C nanoneedles

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Research on soot of black smoke from ceramic furnace flue gas: Characterization of soot

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JOURNAL OF HAZARDOUS MATERIALS 2012年 199卷 272-281页

作者： Lu, Pei Li, Caiting Zeng, Guangming Xie, xuwen Cai, Zhihong Zhou, Yangxin zhao, Yapei Zhan, Qi Zeng, Zheng Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China

In this study, the characterizations of soot from ceramic furnace flue gas were studied using environmental scanning electron microscopy, energy dispersive spectroscopy, particle size distribution, specific surface area measurements, crystal characterizations and organic pollutant analysis. Soot particles were mainly spherical nanoparticles with diameters less than 100 nm. However, the particles could be aggregated into larger ones with a median diameter of 3.66 mu m. Nanometer pores with diameters ranging 2-4 nm were also detected in the soot particles. Because of their large surface areas and pore volumes, other pollutants in the environment can be adsorbed to soot particles potentially making them more hazardous. Several elements, including C, O and Pb, were detected in the soot, but only small amounts of crystalline materials were observed. This is because most of the detected carbon and metals/metal oxides/metal salts were amorphous. Approximately 90 different organic pollutants were detected in the soot, including aromatic compounds and other hydrocarbons. Because of the carcinogenic properties of aromatic compounds and the photochemical effects of hydrocarbons, soot could have serious health and environmental impacts. The results suggest that soot particles are hazardous material and urgently need to be controlled. (C) 2011 Elsevier B.V. All rights reserved.

关键词： Soot Nanoparticle Organic compounds Hazardous materials

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