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Hydrophobic Small-Molecule Polymers as High-Temperature-Resistant Inhibitors in Water-Based Drilling Fluids

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1775-1787页

作者： xuyang Yao Kecheng Liu Zenan Zhou Jun Zhou Xianbin Huang Tiemei lu Yongsheng Yu He Li Engineering Technology Research Institute of Xinjiang Oilfield Company PetroChinaKaramay834000China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China

Water-based drilling fluids can cause hydration of the wellbore rocks,thereby leading to *** study aimed to synthesize a hydrophobic small-molecule polymer(HLMP)as an inhibitor to suppress mud shale *** infrared spectral method and a thermogravimetric technique were used to characterize the chemical composition of the HLMP and evaluate its heat *** were conducted to measure the linear swelling,rolling recovery rate,and bentonite inhibition rate and evaluate accordingly the inhibition performance of the ***,the HLMP was characterized through measurements of the zeta potential,particle size distribution,contact angles,and interlayer space *** confirmed by the results,the HLMP could successfully be synthesized with a favorable heat ***,favorable results were found for the inhibitory processes of the HLMP on swelling and dispersed hydration during mud shale *** positively charged HLMP could be electrically neutralized with clay particles,thereby inhibiting diffusion in the double electron clay *** hydrophobic group in the HLMP molecular structure resulted in the formation of a hydrophobic membrane on the rock surface,enhancing the hydrophobicity of the *** addition,the small molecules of the HLMP could plug the spaces between the layers of bentonite crystals,thereby reducing the entry of water molecules and inhibiting shale hydration.

关键词： Water-based drilling fluids hydrophobic polymers shale inhibitor temperature resistance

Review on piezoelectric actuators:materials,classifications,applications,and recent trends

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Frontiers of Mechanical Engineering 2024年第1期19卷 5-33页

作者： xuyang ZHOU Shuang WU Xiaoxu WANG Zhenshan WANG Qixuan ZHU Jinshuai SUN Panfeng HUANG Xuewen WANG Wei HUANG Qianbo lu Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi’an 710072China School of Automation Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical UniversityNingbo 315103China

Piezoelectric actuators are a class of actuators that precisely transfer input electric energy into displacement,force,or movement outputs efficiently via inverse piezoelectric effect-based electromechanical *** types of piezoelectric actuators have sprung up and gained widespread use in various applications in terms of compelling attributes,such as high precision,flexibility of stoke,immunity to electromagnetic interference,and structural *** paper systematically reviews the piezoelectric materials,operating principles,representative schemes,characteristics,and potential applications of each mainstream type of piezoelectric ***,we intend to provide a more scientific and nuanced perspective to classify piezoelectric actuators into direct and indirect categories with several *** addition,this review outlines the pros and cons and the future development trends for all kinds of piezoelectric actuators by exploring the relations and mechanisms behind *** rich content and detailed comparison can help build an in-depth and holistic understanding of piezoelectric actuators and pave the way for future research and the selection of practical applications.

关键词： piezoelectric actuator piezoelectric effect amplified piezoelectric actuator ultrasonic actuator stepping actuator piezoelectric polymer

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太赫兹射频器件与集成技术研究

太赫兹科学与电子信息学报 2023年第4期21卷 393-436页

作者：卢旭阳毛军发吴林晟顾昌展韩充周亮邱良丰史丽云唐旻上海交通大学射频异质异构集成全国重点实验室上海200240 深圳大学射频异质异构集成全国重点实验室广东深圳518060

无线通信、探测感知、安全检测、人工智能等民用和国防电子信息技术的不断快速发展与演进,对太赫兹(0.1~1 THz)技术提出了越来越迫切的应用需求。太赫兹波段具有丰富的频谱带宽资源,其宽带特性可以支撑未来6G高速率通信、新一代高分辨... 详细信息

无线通信、探测感知、安全检测、人工智能等民用和国防电子信息技术的不断快速发展与演进,对太赫兹(0.1~1 THz)技术提出了越来越迫切的应用需求。太赫兹波段具有丰富的频谱带宽资源,其宽带特性可以支撑未来6G高速率通信、新一代高分辨雷达系统性能的实现。同时,太赫兹通信和探测必须克服高频率、短波长所带来的高传播路径衰减、激增的无源器件与互连损耗以及有源器件功率生成和效率难题。本文将回顾太赫兹射频器件与集成技术的发展现状,阐述上海交通大学团队通过新型无源、有源器件与天线及其先进封装等技术方法,整体提升太赫兹前端系统性能的相关研究进展。

关键词：太赫兹无源与有源器件异质集成天线信道测量近距雷达

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The role of CYP1A1/2 in cholesterol ester accumulation provides a new perspective for the treatment of hypercholesterolemia

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Acta Pharmaceutica Sinica B 2023年第2期13卷 648-661页

作者： Jian lu xuyang Shang Bingyi Yao Dongyi Sun Jie Liu Yuanjin Zhang He Wang Jingru Shi Huaqing Chen Tieliu Shi Mingyao Liu Xin Wang Changning Maternity and Infant Health Hospital and School of Life Sciences Shanghai Key Laboratory of Regulatory BiologyEast China Normal UniversityShanghai 200241China

Cholesterol is an important precursor of many endogenous *** of cholesterol homeostasis can cause many pathological changes,leading to liver and cardiovascular ***1A is widely involved in cholesterol metabolic network,but its exact function has not been fully ***,we aim to explore how CYP1A regulates cholesterol *** data showed that CYP1A1/2 knockout(KO)rats presented cholesterol deposition in blood and *** serum levels of low-density lipoprotein cholesterol,high-density lipoprotein cholesterol and total cholesterol were significantly increased in KO *** studies found that the lipogenesis pathway(LXRa-SREBP1-SCD1)of KO rats was activated,and the key protein of cholesterol ester hydrolysis(CES1)was ***,lansoprazole can significantly alleviate rat hepatic lipid deposition in hypercholesterolemia models by inducing *** findings reveal the role of CYP1A as a potential regulator of cholesterol homeostasis and provide a new perspective for the treatment of hypercholesterolemia.

关键词： Hyperlipidemia Hypercholesteremia Cholesterol CYP1A Lipidosis LXR CES1 Lansoprazole

The effects of circadian rhythm on catechin accumulation in tea leaves

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Beverage Plant Research 2021年第1期1卷 60-68页

作者： Xiaohui Wang Wenfeng Zhu Xin Cheng Zhiqiang lu xuyang Liu Xiaochun Wan Chuankui Song Linlin Liu State Key Laboratory of Tea Plant Biology and Utilization Anhui Agricultural University130 Changjiang West RoadHefeiAnhui 230036China

As the major bitter-and astringent-tasting components in tea leaves,catechins play an essential role in determining flavor characteristics and health benefits of tea *** study analyzed the circadian rhythm effects on the accumulation pattern of catechins in tender leaves of three tea cultivars,'Huangkui'(HK),'Longjing43'(LJ43)and'Fuding Dabaicha'(FD).There were two major factors involved in the catechin regulation in tea plants:genetic background of the cultivar-specific regulation,and temporal effects of the circadian *** leaves of'HK'contained lower levels of catechins than'LJ43'and'FD'.The composition of EGCG in total catechins was significantly higher in'LJ43'leaves(65%)when compared with that in'HK'and'FD'(45%).The accumulation of individual catechins increased during the daytime but decreased overnight,especially over the time period of 22:00−02:*** correlation analysis between catechins and environmental factors indicated catechin accumulation in tea leaves potentially resulted from a combined regulation of light and *** findings provide new insights into our understanding of circadian rhythm regulation on flavor-important secondary metabolites in tea leaves.

关键词： leaves circadian catechin

基于植物代谢组学方法的陕产黄精不同炮制品化学差异研究

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中国药学杂志 2024年第21期59卷 2011-2021页

作者：宋艺君孙婧郭涛高阳丽宋瑞卢旭阳张凯张桥赵重博孙静陕西中医药大学药学院陕西咸阳712046 陕西省中药饮片工程技术研究中心陕西咸阳712046 空军第九八六医院西安710054

目的分析陕产黄精不同炮制品化学成分的差异。方法采用超高效液相色谱-静电场轨道阱高分辨质谱(UPLC-Q-Exactive Orbitrap-MS)技术对陕产黄精不同炮制品的化学成分进行测定,所得数据采用主成分分析(PCA)法与正交偏最小二乘判别分析(OPLS... 详细信息

目的分析陕产黄精不同炮制品化学成分的差异。方法采用超高效液相色谱-静电场轨道阱高分辨质谱(UPLC-Q-Exactive Orbitrap-MS)技术对陕产黄精不同炮制品的化学成分进行测定,所得数据采用主成分分析(PCA)法与正交偏最小二乘判别分析(OPLS-DA)处理,陕产黄精不同炮制品的差异指标成分通过精准的一级质谱质荷比和二级质谱碎片离子同对照品图谱和软件数据库搜索以及相关文献报道成分进行判别分析。结果共鉴定得到45个成分,通过OPLS-DA,筛选出不同炮制品之间差异性化学成分23个,包括氨基酸类13个,生物碱类5个,糖类2个,香豆素类1个,皂苷类1个,有机酸类1个。结论黄精、蒸黄精、酒黄精存在一定的化学成分差异,可为黄精炮制品的质量控制和药效研究奠定物质基础。

关键词：黄精蒸黄精酒黄精不同炮制品化学差异植物代谢组学

Highly effective electrochemical water oxidation by copper oxide film generated in situ from Cu(Ⅱ) tricine complex

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Chinese Journal of Catalysis 2018年第3期39卷 479-486页

作者： Yan Gao Hu Chen lu Ye Zhongkai lu Yanan Yao Yu Wei xuyang Chen State Key Laboratory of Fine Chemicals Institute of Artificial Photosynthesis DUT‐KTH Joint Education and Research Center on Molecular DevicesDalian University of Technology (DUT) Dalian 116024 Liaoning China

Developing highly efficient and stable water oxidation catalysts based on abundant metallic elements is a challenge that must be met to fulfill the promise of water splitting for clean energy *** this work,we developed an oxygen evolution reaction catalyst consisting of a nanostructured film electrodeposited from a phosphate buffer solution(0.2mol/L,pH=12.0)containing Cu‐tricine complex.A Tafel plot showed that the required overpotential for a current densityof1.0mA/cm2was only395mV and the Tafel slope was46.7mV/*** addition,the Cu‐tricine film maintained a stable current density of7.5mA/cm2for the oxygen evolution reaction in phosphate buffer solution for10h,and a Faradaic efficiency of99%was obtained.

关键词： Water oxidation Oxygen evolution reaction Electrodeposition Copper oxide film Electrocatalyst

Establishment of two-dimensional gel electrophoresis for soybean protein isolate and its application

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Grain & Oil Science and Technology 2020年第3期3卷 100-109页

作者： Xinkai lu Yaoming Cui Junjun Guan Xue Liu Hao Zhu xuyang Ji Jianzhang Zheng Yunlong Cheng Xiaofei Fu College of Biological Engineering Henan University of TechnologyZhengzhou 450001China

To optimize the conditions for the establishment of two-dimensional gel electrophoresis(2-DE)of soybean protein isolate(SPI),we investigated Ampholine mixture,anodic and cathodic electrolytes,loading amount of sample,acrylamide concentration,p H gradient and gel staining method in twodimensional gel electrophoresis to optimize the protein imaging conditions in two-dimensional *** results of mixed-level design experiments showed that Ampholine,loading amount and gel staining method had significant effect(Plutions had significant statistical effects on the protein separation degree,the complexity of the protein composition and the visibility of the gel images were more inclined to the 12%gel,the 3–10 pH gradient and the H3PO4/NaOH *** to the established conditions,the hydrolyzed products of SPI emulsion were determined by 2-DE,and the dynamic changes of protein in the process of enzymatic hydrolysis were described.

关键词： Two-dimensional gel electrophoresis Soybean protein isolate Enzymatic hydrolysate Soybean protein isolate emulsion

基于运动食品的蛋白-磷脂聚集体及其乳液的液滴特性

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中国食品学报 2022年第9期22卷 103-113页

作者：周洋管军军路新开冀旭阳河南工业大学体育学院郑州450001 河南工业大学生物工程学院郑州450001

以酶解大豆蛋白与磷脂为主要材料,构建运动营养食品体系。通过电导、电位、粒径、SDS-PAGE电泳、ISO-DALT双向电泳及显微观察,对其形成聚集体及其复合乳液液滴特性与蛋白亚基的变化进行研究。结果表明:胃蛋白酶对大豆蛋白只能有限降解,... 详细信息

以酶解大豆蛋白与磷脂为主要材料,构建运动营养食品体系。通过电导、电位、粒径、SDS-PAGE电泳、ISO-DALT双向电泳及显微观察,对其形成聚集体及其复合乳液液滴特性与蛋白亚基的变化进行研究。结果表明:胃蛋白酶对大豆蛋白只能有限降解,酶解30 min后蛋白亚基变化不显著;当酶解大豆蛋白(酶解30 min)与磷脂的质量比为5∶1时,其聚集体具有较好的液滴特性(P<0.05)。以该比例制备聚集体作为壁材,当油相和水相的比例为1∶3时,可形成较为理想的水包油型乳化体系(P<0.05)。对比酶解蛋白乳液,复合乳液液滴有较高的平均粒径及电位(P<0.05)。在体外胃消化过程中,复合乳液的液滴特性(电导率、电位及平均粒径)明显高于酶解蛋白乳液(P<0.05),其蛋白降解速度要大于酶解蛋白乳液,且除β亚基外其余亚基均能被降解。由此,推导复合乳液在体外胃消化中存在液滴"自组装"过程,这为大豆蛋白类食品乳化体系在运动营养食品中的应用以及阐明其消化吸收机理提供参考。

关键词：酶解大豆蛋白磷脂聚集体复合乳液液滴