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Synthesis and controlled release kinetics of pH-sensitive hollow polyaniline microspheres encapsuled with the corrosion inhibitor

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JOURNAL OF MOLECULAR LIQUIDS 2021年 342卷 117497-117497页

作者： cao, Yang Yuan, xuwen Wang, Xuan Li, Wentao Yang, Huaiyu Chinese Acad Sci Inst Met Res Shenyang 110016 Peoples R China Univ Sci & Technol China Sch Mat Sci & Engn Hefei 230026 Peoples R China

It has long been a question of great interest in a wide range of fields including smart organic coatings to develop environmentally sensitive drug-loaded micro-storage system and to study its controlled release law. Herein, we first report a novel one-step approach for the synthesis of inhibitor-encapsuled polyaniline hollow microspheres (MBT@PANI) with pH sensitive response and controlled release function based on supramolecular in situ interfacial polymerization technique. An accurate and reliable HPLC method for quantitative determination of the corrosion inhibitor MBT has been established. The pH sensitive controlled release behavior and kinetic mechanism of MBT in 3.5% NaCl solutions were systematically investigated. It was found that the average particle size of the synthesized MBT@PANI microspheres was 1.7 mu m and the encapsulation efficiency and the loading of corrosion inhibitor MBT was above 99% and 23.5% (wt.), respectively. The MBT@PANI microspheres exhibited an outstanding feature of long-term sustainable controlled release in 3.5% NaCl solutions with different pH values, and as the pH of the release medium increased, the release rate and cumulative release amount of MBT gradually increased. With the prolonging of the release time, the release process of the inhibitor MBT had three stages and sequentially obeyed the Elovich, first-order and zero-order kinetics. The possible mechanism of pH sensitive controlled release was discussed. (C) 2021 Elsevier B.V. All rights reserved.

关键词： Polyaniline Microcapsules pH-sensitive Controlled release Kinetics

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Functional characterization of TBL genes revealed the role of GhTBL7 and GhTBL58 in cotton fiber elongation

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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 2023年第1期241卷 124571页

作者： Kabir, Nosheen Wang, xuwen Lu, Lili Qanmber, Ghulam Liu, Le Si, Aijun Zhang, Lian cao, Wei Yang, Zuoren Yu, Yu Liu, Zhao Zhengzhou Univ Sch Agr Sci State Key Lab Cotton Biol Zhengzhou Res Base Zhengzhou 450001 Henan Peoples R China Chinese Acad Agr Sci Inst Cotton Res State Key Lab Cotton Biol Anyang 455000 Henan Peoples R China Xinjiang Acad Agr & Reclamat Sci Cotton Res Inst Key Lab China Northwestern Inland Reg Minist Agr & Rural Affairs Shihezi 832003 Peoples R China Chinese Acad Agr Sci Western Agr Res Ctr Changji 831100 Peoples R China

TBL (Trichome Birefringence Like) gene family members are involved in trichome initiation and xylan acetylation in several plant species. In our research, we identified 102 TBLs from G. hirsutum. The phylogenetic tree classified TBL genes into five groups. Collinearity analysis of TBL genes indicated 136 paralogous gene pairs in G. hirsutum. Gene duplication indicated that WGD or segmental duplication contributed to the GhTBL gene family expansion. Promoter cis-elements of GhTBLs were related to growth and development, seed-specific regulation, light, and stress responses. GhTBL genes (GhTBL7, GhTBL15, GhTBL21, GhTBL25, GhTBL45, GhTBL54, GhTBL67, GhTBL72, and GhTBL77) exhibited upregulated response under exposure to cold, heat, NaCl, and PEG. GhTBL genes exhibited high expression during fiber development stages. Two GhTBL genes (GhTBL7 and GhTBL58) showed differential expression at 10 DPA fiber, as 10 DPA is a fast fiber elongation stage and fiber elongation is a very important stage of cotton fiber development. Subcellular localization of GhTBL7 and GhTBL58 revealed that these genes reside inside the cell membrane. Promoter GUS activity of GhTBL7 and GhTBL58 exhibited deep staining in roots. To further validate the role of these genes in cotton fiber elongation, we silenced these genes and observed a significant reduction in the fiber length at 10 DPA. In conclusion, the functional study of cell membrane-associated genes (GhTBL7 and GhTBL58) showed deep staining in root tissues and potential function during cotton fiber elongation at 10 DPA fiber.

关键词： G hirsutum TBL Fiber development Phylogenetic analysis Gene silencing

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Binding affinity and dissociation pathway predictions for a series of USP7 inhibitors with pyrimidinone scaffold by multiple computational methods

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PHYSICAL CHEMISTRY CHEMICAL PHYSICS 2020年第10期22卷 5487-5499页

作者： Wang, Zhe Wang, xuwen Kang, Yu Zhong, Haiyang Shen, Chao Yao, Xiaojun cao, Dongsheng Hou, Tingjun Zhejiang Univ Coll Pharmaceut Sci Hangzhou 310058 Zhejiang Peoples R China Macau Univ Sci & Technol Macau Inst Appl Res Med & Hlth State Key Lab Qual Res Chinese Med Ave Wai Long Taipa Macao Peoples R China Cent South Univ Xiangya Sch Pharmaceut Sci Changsha 410013 Hunan Peoples R China

Ubiquitin specific protease 7 (USP7) has attracted increasing attention because of its multifaceted roles in different tumor types. The crystal structures of USP7-inhibitor complexes resolved recently provide reliable models for computational structure-based drug design (SBDD) towards USP7. How to accurately estimate USP7-ligand binding affinity is quite critical to guarantee the reliability of SBDD. In this study, we assessed the reliability of multiple computational methods to the binding affinity prediction for a series of USP7 inhibitors with the pyrimidinone scaffold, including molecular docking scoring, MM/PB(GB)SA, and umbrella sampling (US). It was found that the accuracy of the evaluated computational methods for binding affinity prediction follows the order: US-based method > MM/PB(GB)SA > Glide XP scoring. The calculation results demonstrate that incorporating protein flexibility through induced-fit docking or ensemble docking cannot improve the performance of the Glide scoring based on rigid-receptor docking. For the MM/PB(GB)SA methods, the choice of the protein structure and the calculation procedure has a marked impact on the predictions. More importantly, we discovered for the first time that there are significant differences in the dissociation pathways of strong-binding inhibitors and weak-binding inhibitors of USP7, which may be used as a new criterion to judge whether an inhibitor is a strong binder or not. It is expected that our work can provide valuable guidance on the design and discovery of potent USP7 inhibitors.

关键词： Computational methods

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Process knowledge graph modeling techniques and application methods for ship heterogeneous models

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SCIENTIFIC REPORTS 2022年第1期12卷 1-14页

作者： Dong, Jianwei Jing, xuwen Lu, Xiang Liu, Jinfeng Li, Haipeng cao, Xuwu Du, Chenxiao Li, Jun Li, Lei Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212100 Jiangsu Peoples R China China Merchants Cruise Shipbldg Co LTD Nantong 226000 Peoples R China

In the process design and reuse of marine component products, there are a lot of heterogeneous models, causing the problem that the process knowledge and process design experience contained in them are difficult to express and reuse. Therefore, a process knowledge representation model for ship heterogeneous model is proposed in this paper. Firstly, the multi-element process knowledge graph is constructed, and the heterogeneous ship model is described in a unified way. Then, the multi-strategy ontology mapping method is applied, and the semantic expression between the process knowledge graph and the entity model is realized. Finally, by obtaining implicit semantics based on case-based reasoning and checking the similarity of the matching results, the case knowledge reuse is achieved, to achieve rapid design of the process. This method provides reliable technical support for the design of ship component assembly and welding process, greatly shortens the design cycle, and improves the working efficiency. In addition, taking the double-deck bottom segment of a ship as an example, the process knowledge map of the heterogeneous model is constructed to realize the rapid design of ship process, which shows that the method can effectively acquire the process knowledge in the design case and improve the efficiency and intelligence of knowledge reuse in the process design of the heterogeneous model of a ship.

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Research on the intelligent generation method of MBD model 3D marking using predefined features

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CONCURRENT ENGINEERING-RESEARCH AND APPLICATIONS 2020年第3期28卷 222-238页

作者： Jing, xuwen Tang, Mingming Liu, Jinfeng Zhou, Honggen Zhao, Peng Wang, Zhen cao, Xuwu Sheng, Sushan Wei, Gang Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Jiangsu Peoples R China Jiangsu Univ Sci & Technol Jiangsu Prov Key Lab Adv Mfg Marine Mech Equipmen Zhenjiang Jiangsu Peoples R China Shanxi Diesel Engine Heavy Ind Co Ltd Xingping Shanxi Peoples R China

Model-based definition (MBD) carries out a technological innovation for global manufacturing, application of MBD technology plays an important supporting in process design, product manufacturing and other development activities, rapid creation of MBD models have become a key to reduce time and cost for enterprises. However, interactive dimensioning method has severely hampered the efficiency of MBD model creation. This paper mainly studies the dimensions intelligent marking method based on the predefined features to solve the rapid modeling problem of MBD model. Firstly, the expression model of dimensions metadata is established based on the feature identifier. Secondly, by establishing an association mechanism between the dimensions and the predefined feature, the "model-feature-dimensioning" association model is formed. Thirdly, through analysis of the dimensioning type, the intelligent dimensioning algorithm process is determined. Moreover, the completeness check of the dimensions is guaranteed during the marking process. Finally, taking the connecting rod and crankshaft of marine diesel as the research object, the effectiveness of this method is verified.

关键词： MBD dimension predefined features metadata intelligent marking

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Reliability optimization of process parameters for marine diesel engine block hole system machining using improved PSO

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SCIENTIFIC REPORTS 2021年第1期11卷 1-13页

作者： Zhou, Honggen Yang, Weibin Sun, Li Jing, xuwen Li, Guochao cao, Liping Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212000 Jiangsu Peoples R China Shaanxi Diesel Engine Heavy Ind Co Ltd Xingping 713100 Peoples R China

The processing quality of the block hole system affects the working performance of the marine diesel engine block directly. Choosing an appropriate combination of process parameters is a prerequisite to improving the accuracy of the block hole system. Uncertain fluctuations of process parameters during the machining process would affect the process reliability of the block hole system, resulting in an ultra-poor accuracy. For this reason, the RBF method is used to establish the relationship between the verticality of the cylinder hole and process parameters, including cutting speed, depth of cut, and feed rate. The minimum cylinder hole verticality is taken as the goal and the process reliability constraints of the cylinder hole are set based on Monte Carlo, a reliability optimization model of processing parameters for cylinder hole is established in this paper. Meanwhile, an improved particle swarm algorithm was designed to solve the model, and eventually, the global optimal combination of process parameters for the cylinder hole processing of the diesel engine block in the reliability stable region was obtained.

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带窗洞的竖向分布钢筋不连接装配整体式剪力墙的受力性能分析

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建筑结构 2023年第5期53卷 30-35页

作者：宋晓滨蔡琪肖绪文曹志伟李厂张士前同济大学土木工程学院建筑工程系上海200092 中国建筑股份有限公司北京100029 中国建筑第八工程局有限公司上海200112

为探究带窗洞的竖向分布钢筋不连接装配整体式剪力墙(SGBL装配整体式剪力墙)的受力性能,采用ABAQUS软件建立SGBL装配整体式剪力墙精细化有限元模型。有限元模型采用Cohesive接触和弹簧单元模拟预制墙板与后浇混凝土的拼缝,模拟所得荷载... 详细信息

为探究带窗洞的竖向分布钢筋不连接装配整体式剪力墙(SGBL装配整体式剪力墙)的受力性能,采用ABAQUS软件建立SGBL装配整体式剪力墙精细化有限元模型。有限元模型采用Cohesive接触和弹簧单元模拟预制墙板与后浇混凝土的拼缝,模拟所得荷载-位移曲线及破坏模式与文献中试验结果均吻合良好。在此基础上,对比了带窗洞SGBL装配整体式剪力墙与带窗洞现浇剪力墙受力性能的差异,并讨论了轴压比和洞口偏心等参数对带窗洞SGBL装配整体式剪力墙的承载力和刚度的影响。结果表明:通过适当增加边缘现浇段竖向钢筋,带窗洞SGBL装配整体式剪力墙可拥有等同带窗洞现浇剪力墙的承载力。此外,轴压比对两类开洞剪力墙受力性能影响均较小,洞口偏心对带窗洞SGBL装配整体式剪力墙的承载力影响较小,当洞口偏心率小于20%时,洞口偏心对刚度的影响小于8%。

关键词： SGBL装配整体式剪力墙带窗洞剪力墙竖向分布钢筋不连接抗侧性能有限元分析

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Metabolomics coupled with SystemsDock reveal the protective effect and the potential active components of Naozhenning granule against traumatic brain injury

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JOURNAL OF ETHNOPHARMACOLOGY 2020年 246卷 112247-000页

作者： cao, Jianhua Duan, Yahui Liu, Yanzhi Liu, Haixia Wei, Chunhong Wang, Jiang Qin, Xuemei Wang, xuwen Li, Zhenyu Shanxi Univ Modern Res Ctr Tradit Chinese Med Taiyuan 030006 Shanxi Peoples R China Shanxi Univ Coll Chem & Chem Engn Taiyuan 030006 Shanxi Peoples R China Shanxi Zhendong Ante Biol Pharmaceut Co Ltd Jinzhong 030600 Peoples R China

Ethnopharmacological relevance: Naozhenning granule (NZN), a widely traditional Chinese medicine (TCM) prescription with a long history of clinical, which is mainly used in the treatment of concussion, cerebral post-traumatic syndrome, consists of Di Huang (Radix of Rehmannia glutinosa (Gaertn.) DC.), Dang Gui (Radix of Angelica sinensis (Olio.) Diels), Chen Pi (Pericarpium of Citrus reticulata Blanco), Dan shen (Radix of Salvia Miltiorrhiza Bunge.), Di Long (Pheretima aspergillum (E. Perrier)), Mu Dan Pi (Cortex of Paeonia suffruticosa Andrews), Suan Zao Ren (Semen of Ziziphus jujuba Mill.), Chuan Xiong (Rhizoma of Ligusticum striatum DC.), Zhu Ru (Phyllostachys nigra (Lodd. Ex Lindl.) Munro), Bai Zi Ren (Semen of Platycladus orientalis (L.) Franco) and Fu Ling (sclerotium of Poria cocos (Schw.)Wolf). Aim of the study: This study aimed to unravel the mechanism and material basis of NZN against traumatic brain injury. Materials and methods: In this study, a H-1 nuclear magnetic resonance (NMR) based metabolomic approach combined with systemsDock was employed to study the protective effect of NZN against traumatic brain injury using a cerebral concussion rat model. The morris water maze test and biochemical indexes were used to evaluate the efficacy of NZN. Results: The results of morris water maze test suggested NZN can improve the spatial learning and memory of model rats, and the superoxide dismutas (SOD) and malonyldialdehyde (MDA) level indicated that the effect of NZN was related with the regulation of oxidative stress. Multivariate analysis revealed that the effect of NZN was related with regulation of 18 brain metabolites, and the corresponding metabolic pathways were further revealed by MetPA analysis. 13 serum absorbed components were found to hit the targets both related with the metabolic regulation and cerebral trauma through systemsDock-aided molecular docking experiments, and these compounds might be served as the active compounds in NZN against cerebr

关键词： Naozhenning granule Cerebral concussion Metabolomics Molecular docking

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氨氮胁迫对翘嘴鳜幼鱼抗氧化酶、消化酶活性及应激相关基因表达的影响

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水产科技情报 2024年第1期51卷 44-51页

作者：孙阿君丁炜东曹丽萍曹哲明邴旭文中国水产科学研究院淡水渔业研究中心农业农村部淡水渔业和种质资源利用重点实验室无锡214081

为了解氨氮胁迫下翘嘴鳜(Siniperca chuatsi)幼鱼肝脏、胃抗氧化系统和消化系统的响应机制,以体质量为(15.27±0.67)g的翘嘴鳜幼鱼为研究对象,探讨了6个氨氮胁迫质量浓度(0、10、20、30、40、50 mg/L)下肝脏和胃中谷胱甘肽(GSH)、... 详细信息

为了解氨氮胁迫下翘嘴鳜(Siniperca chuatsi)幼鱼肝脏、胃抗氧化系统和消化系统的响应机制,以体质量为(15.27±0.67)g的翘嘴鳜幼鱼为研究对象,探讨了6个氨氮胁迫质量浓度(0、10、20、30、40、50 mg/L)下肝脏和胃中谷胱甘肽(GSH)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、脂质过氧化物(LPO)、胃蛋白酶(pepsin)、胃淀粉酶(AMS)、胃脂肪酶(LPS)的活性和IL-1β、IL-8、TNF-α、HSP90α等应激相关基因的表达情况。试验结果表明,随着氨氮质量浓度的提高,肝脏抗氧化相关酶中的SOD、CAT、GSH活性呈先升高后下降的趋势,LPO活性呈逐渐升高的趋势,IL-1β、HSP90α基因表达量呈先升高后降低的趋势,TNF-α表达量呈逐渐升高的趋势,IL-8表达量呈降低-升高-降低的趋势;胃消化酶中的胃蛋白酶活性呈现先升高后降低的趋势,而AMS和LPS活性呈逐渐升高的趋势。结果表明,在低浓度氨氮胁迫条件下,鱼体通过诱导抗氧化酶活性升高和应激相关基因表达上调来应对氧化应激损伤,同时诱导升高胃消化酶活性为机体提供能量,而高浓度氨氮胁迫则抑制了抗氧化酶活性和HSP90α基因的表达。

关键词：氨氮胁迫翘嘴鳜抗氧化酶消化酶炎症相关基因酶活力

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Machining-Reliability-based Optimization of Process Parameters for Marine Diesel Engine Block Hole System Using HJ-PSO

Research Square

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Research Square 2021年

作者： Zhou, Honggen Yang, Weibin Sun, Li Jing, xuwen Li, Guochao cao, Liping School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212000 China Shaanxi Diesel Engine Heavy Industry Company Limited Xingping713100 China

The processing quality of the block hole system affects the working performance of the marine diesel engine block directly. Choosing an appropriate combination of process parameters is a prerequisite to improve the accuracy of the block hole system. Uncertain fluctuations of process parameters during the machining process would affect the process reliability of the block hole system, resulting in an ultra-poor accuracy. For this reason, the RBF method is used to establish the relationship between the verticality of the cylinder hole and process parameters, including cutting speed, depth of cut, and feed rate. Taking the minimum cylinder hole verticality as the goal and setting the process reliability constraints of the cylinder hole based on Monte Carlo, a reliability optimization model of processing parameters for cylinder hole is established in this paper. Meanwhile, an improved particle swarm algorithm was designed to solve the model, and eventually, the global optimal combination of process parameters for the cylinder hole processing of the diesel engine block in the reliability stable region was obtained. © 2021, CC BY.

关键词： Reliability

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