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分子添加剂和材料表面改性调控病理矿化的研究进展

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化学工业与工程 2023年第1期40卷 25-40页

作者：李中华孟英爽周诚常佩姜菡雨姜晓滨大连理工大学化工学院精细化工国家重点实验室辽宁大连116024 西安近代化学研究所西安710065

当生物体内环境偏离正常范围,或调控矿化过程的大分子无法发挥功能时,过饱和的矿物质在组织表面成核并生长,或从体液中析出并附着组织表面,引发炎症、生理组织功能损坏和血管、尿管等堵塞。医疗长期植入物如何获得生物组织甚至超越生物... 详细信息

当生物体内环境偏离正常范围,或调控矿化过程的大分子无法发挥功能时,过饱和的矿物质在组织表面成核并生长,或从体液中析出并附着组织表面,引发炎症、生理组织功能损坏和血管、尿管等堵塞。医疗长期植入物如何获得生物组织甚至超越生物组织的抗污染、抗结垢能力需要被重视。以上问题的解决亟需结晶热力学和界面晶体工程的研究,具有化学工程、材料科学和医学学科交叉的特点。本论文从改变体液环境和植入材料表面改性调控结晶的思路出发,介绍了病理性矿化机制,综述了病理矿化诱发的几种重要结石疾病的结晶调控方法,重点阐述了能够抑制病理矿化的小分子、大分子、纳米颗粒和聚合物表面抑制结晶机制以及设计开发策略。最后,总结了抑制病理矿化领域的主要问题,对抑制剂分子开发和生物防垢表面设计的发展提出展望。

关键词：结晶调控病理矿化材料界面纳米颗粒分子添加剂

卵巢Sertoli-Leydig细胞瘤临床病理特征分析(附5例)

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现代肿瘤医学 2024年第16期32卷 3072-3077页

作者：方婉婷明健孟英爽商家炜北部战区总医院病理科辽宁沈阳110003

目的:分析卵巢Sertoli-Leydig细胞瘤(Sertoli-Leydig cell tumor, SLCT)临床病理特征。方法:报道5例卵巢sertoli-Leydig细胞瘤,总结其镜下表现,免疫组化特点,并复习文献。结果:5例卵巢Sertoli-Leydig细胞瘤,2例低分化,其余3例为高分化,... 详细信息

目的:分析卵巢Sertoli-Leydig细胞瘤(Sertoli-Leydig cell tumor, SLCT)临床病理特征。方法:报道5例卵巢sertoli-Leydig细胞瘤,总结其镜下表现,免疫组化特点,并复习文献。结果:5例卵巢Sertoli-Leydig细胞瘤,2例低分化,其余3例为高分化,中分化和网状型。Sertoli细胞,表达α-inhibin、Calretinin、WT-1,Leydig细胞α-inhibin、Claretinin表达比Sertoli细胞强,还可表达Melan-A。结论:卵巢Sertoli-Leydig细胞瘤是一种罕见的卵巢肿瘤,其形态丰富要注意和许多疾病鉴别诊断,病理医生应充分了解其病理特征避免出现误诊和漏诊。

关键词： Sertoli-Leydig细胞瘤免疫组化鉴别诊断

Influence of Ru on Solidification Behavior, Microstructure and Hardness of Re-free Ni-based Equiaxed Superalloys with High Cr Content

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Journal of Materials Science & Technology 2016年第3期32卷 271-281页

作者： yingshuang Guan Enze Liu Xiurong Guan Zhi Zheng School of Environmental and Chemical Engineering Shenyang Ligong University Shenyang 110159 China Superalloys Division Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The effect of Ru addition on solidification behavior, microstructure and hardness of Re-free Ni-based equiaxed superalloys with high Cr content has been investigated. With the increase of Ru, the solidus temperature of the alloys and the γ＂ solvus temperature decreased, respectively. However, the liquidus temperatures of the alloys bad no obvious change. The microstructure of the as-cast alloys was mainly composed of γ, γ＇, γ＇/γ＇ eutectic and MC carbides. The γ/γ＇ eutectic was completely dissolved after the heat treatment. The morphology of γ＇ was more cuboidal in heat-treated alloys with increasing Ru. Furthermore, the volume fraction of γ＇ in the as-cast and heat-treated alloys diminished upon the increase of Ru. It was noted that Ru addition changed the segregation behaviors of Cr and Mo in the alloys from positive segregation element to negative segregation element and promotes the segregation degree of W. As the Ru content increased, the magnitude of segregation of the positive segregation elements Ta and Ti increased accordingly. Meanwhile, the magnitude of Al segregation decreased and Ru tended to segregate in the dendrite core. In addition, the hardness of the alloys improved and their porosity reduced with increasing amount of Ru.

关键词： Ru Ni-based equiaxed superalloy Microstructure Segregation Hardness

Kinetics for hydrogen production by methanol steam reforming in fluidized bed reactor

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Science Bulletin 2016年第5期61卷 401-405页

作者： Fuxiang Zhang yingshuang Shi Lijun Yang Xiaoze Du Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (North China Electric Power University) Ministry of Education

Hydrogen is one of the best energy *** bed reactor provides a promising approach for hydrogen production. To describe the hydrogen generating rate with methanol steam reforming in fluidized bed reactor quantitatively, dual-rate kinetic models of the reactions with exponent form were developed, including that of steam reforming reaction(SR) and decomposition reaction(DE).The reaction rate per unit mass of catalyst was related to partial pressures of components. The exponentials in kinetic equations were obtained by linear least-squares method based on the experimental data. The variance homogeneity test(F test) shows that the dynamic models are feasible with high accuracy, which can be used to predict the generating rate of hydrogen under different reaction temperatures and feed flow rates in fluidized bed reactor. The SR and DE activation energy obtained indicates that ESR\ EDE, which can explain the previous observation that the CO_2 selectivity decreased with the temperature increase.

关键词： Kinetics model Methanol steam reforming Hydrogen production Fluidized bed reactor

Flow mechanism and heat transfer enhancement in longitudinal-flow tube bundle of shell-and-tube heat exchanger

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Science China(Technological Sciences) 2009年第10期52卷 2952-2959页

作者： Wei Liu ZhiChun Liu yingshuang Wang SuYi Huang School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China

The flow disturbance and heat transfer mechanism in the tube bundle of rod baffle shell-and-tube heat exchanger were analyzed, on the basis of which and combined with the concept of heat transfer enhancement in the core flow, a new type of shell-and-tube heat exchanger with combination of rod and van type spoiler was designed. Corresponding mathematical and physical models on the shell side about the new type heat exchanger were established, and fluid flow and heat transfer characteristics were numerically analyzed. The simulation results showed that heat transfer coefficient of the new type of heat exchanger approximated to that of rod baffle heat exchanger, but flow pressure drop was much less than the latter, indicating that comprehensive performance of the former is superior to that of the latter. Compared with rod baffle heat exchanger, heat transfer coefficient of the heat exchanger under investigation is higher under same pressure drop, especially under the high Reynolds numbers.

关键词： shell-and-tube heat exchanger tube bundle rod baffle vane-type spoiler core flow heat transfer enhancement

Does enterprise digitization reduce carbon emissions? Evidence from China

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Chinese Journal of Population,Resources and Environment 2023年第4期21卷 219-230页

作者： Qiguang An yingshuang Shi School of Mathematics and Statistics Shandong University of Finance and EconomicsJinan 250002China

The digital transformation and expansion of businesses will provide China’s low-carbon economic develop‐ment strategy with fresh impetus in the backdrop of the emerging digital economy and environmentally friendly *** article measures the level of enterprise digitization using two methods:the enterprise digitization index and text analysis word frequency ***,carbon emissions are obtained by measuring various types of emissions according to the carbon emission classification range *** ac‐count for endogeneity and unobservable variables,relative indicators,such as the rate of increase for company emissions of carbon,are *** microdata from Chinese listed firms from 2011 to 2021,this study ex‐amines the implications of corporate digitization on enterprise carbon *** study further analyzes the transmission mechanism and investigates the function of green finance in controlling corporate digitiza‐tion and reducing corporate carbon emissions by distinguishing between two types of green *** shows that businesses’carbon emissions are greatly reduced as a consequence of getting *** after performing several robustness and endogeneity tests,the conclusion still remains *** to mecha‐nism analysis,which demonstrates that the main strategy for reducing corporate emissions of carbon through the digitalization of enterprises is to promote innovation in green *** regulation of green finance in enterprise digitalization will further reduce corporate carbon *** to the analysis of hetero‐geneity,state-owned businesses and those situated in areas with stringent environmental regulations are more significantly impacted by enterprise digitization on corporate carbon *** article discusses the mechanism of promoting corporate carbon emissions through digitalization,expands on relevant research on corporate digitalization,and analyzes the achievable paths of corpor

关键词： Enterprise digitization Enterprise carbon emissions Green technology innovation Green finance

Recent advances in electrocatalysts for seawater splitting

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Nano Materials Science 2023年第1期5卷 101-116页

作者： Guangbo Liu yingshuang Xu Teng Yang Luhua Jiang Nanomaterial&Electrocatalysis Laboratory College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao266042PR China

Water splitting is an effective strategy to produce renewable and sustainable hydrogen ***,seawater splitting,avoiding use of the limited freshwater resource,is more ***,electrocatalysts explored for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)using natural seawater or saline electrolyte have been increasingly *** better understand the current status and challenges of the electrocatalysts for HER and OER from seawater,we comprehensively review the recent advances in electro-catalysts for seawater *** fundamentals,challenges and possible strategies for seawater splitting are firstly ***,the recently reported electrocatalysts that explored for HER and OER from seawater are summarized and ***,the perspectives in the development of high-efficient electrocatalysts for seawater splitting are also proposed.

关键词： Seawater splitting Electrocatalysts Hydrogen evolution reaction Oxygen evolution reaction

Synthesis of strong SiV photoluminescent diamond particles on silica optical fiber by chemical vapor deposition

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Chinese Physics B 2018年第3期27卷 481-486页

作者： Zongchun Yang yingshuang Mei Chengke Chen Yinlan Ruan Xiaojun Hu College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China ARC Centre of Excellence in Nanoscale Biophotonics Institute of Photonics and Advanced SensingThe University of AdelaideAdelaideSA 5005Australia

The separated silicon-vacancy(SiV)photoluminescent diamond particles were synthesized on a silica optical fiber by hot filament chemical vapor deposition(HFCVD).The effects of the pre-treated method and chamber pressure on the microstructure and photoluminescence of the diamond particles were *** results show that the diamond particles are homogeneously distributed on the surface of the optical *** the chamber pressure increasing from 1.6 kPa to 3.5 kPa,the shape of the particles transforms from flake to circle,while the diamond particles cannot be deposited on the fiber with the pressure further increased to 4.5 *** samples synthesized under 2.5 kPa chamber pressure are composed of diamond particles with size around 200-400 nm,exhibiting stronger SiV photoluminescence with the width of around 6 nm.

关键词： diamond silicon vacancy photoluminescence optical fiber

Efficiently photothermal conversion in a MnO_(x)-based monolithic photothermocatalyst for gaseous formaldehyde elimination

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Chinese Chemical Letters 2022年第5期33卷 2564-2568页

作者： Pengfei Sun Huijia Yu Tingting Liu yingshuang Li Zhongsen Wang Yufei Xiao Xiaoping Dong Department of Chemistry Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018China

Volatile organic compound(VOC)pollution has a serious impact on human and urgently needs to be controlled through the development of new methods and catalytic *** with traditional thermal catalytic oxidation,the synergistic photothermocatalysis is regarded as a green and environmen-tally friendly strategy for organic compound pollutant removal,which can promote spontaneous heating of the surface of catalysts to achieve thermal catalytic reaction conditions via harvesting light *** this paper,a monolithic photothermocatalyst was synthesized through coating graphene oxide(GO)and MnOx in turn on a commercially available melamine sponge,where the GO mainly acted as a photothermal conversion layer to heat the catalytically active MnO_(x).This monolithic catalyst presented excellent photo-induced activity for formaldehyde elimination under ambient conditions(∼90%degrada-tion ratio in 20 min for∼160 ppm initial concentration formaldehyde),and meanwhile possessed a high catalytic durability for multiple *** kinetic study demonstrated that this photothermocatalytic process followed a pseudo-second-order ***,we proposed a possible formaldehyde degrada-tion pathway based on in situ DRIFTS examination.

关键词： Photothermal catalytic Melamine sponge Graphene oxide MnO_(x) Formaldehyde