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Role of.membrane and compound properties in af.ecting the rejection of.pharmaceuticals by dif.erent RO/Nf.membranes

f.ontiers of.Environmental Science & Engineering 2017年第6期11卷 193-205页

作者： Yang-ying Zhao f.n-xin Kong Zhi Wang Hong-wei Yang Xiao-mao Wang yuefeng f. xie T. David Waite State Key Joint Laboratory of.Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China School of.Chemical Engineering China University of Petroleum Beijing 102249 China Environmental Engineering Programs The Pennsylvania State University Middletown PA 17057 USA School of.Civil and Environmental Engineering The University of New South Wales Sydney NSW 2052 Australia

This study was conducted to assess the merits and limitations of.various high-pressure membranes, tight nanof.ltration （Nf. membranes in particular, f.r the removal of.trace organic compounds （TrOCs）. The perf.rmance of.a low-pressure reverse osmosis （LPRO） membrane （ESPA1）, a tight Nf.membrane （Nf.0） and two loose Nf.membranes （HL and Nf.70） was compared f.r the rejection of.23 dif.erent pharmaceuticals （PhACs）. Ef.orts were also devoted to understand the ef.ect of.adsorption on the rejection perf.rmance of.each membrane. Dif.erence in hydrogen bond f.rmation potential （Hf.） was taken into consideration. Results showed that Nf.0 perf.rmed similarly to ESPA1 with mean rejection higher than 95%. Nf.70 outperf.rmed HL in terms of.both water permeability and PhAC rejection higher than 90%. Electrostatic ef.ects were more signif.cant in PhAC rejection by loose Nf.membranes than tight Nf.and LPRO membranes. The adverse ef.ect of.adsorption on rejection by HL and ESPA1 was more substantial than Nf.70 and Nf.0, which could not be simply explained by the dif.erence in membrane surf.ce hydrophobicity, selective layer thickness or pore size. The HL membrane had a lower rejection of.PhACs of.higher hydrophobicity （log D〉0） and higher Hf. （〉0.02）. Nevertheless, the ef.ects of.PhAC hydrophobicity and Hf. on rejection by ESPA1 could not be discerned. Poor rejection of.certain PhACs could generally be explained by aspects of.steric hindrance, electrostatic interactions and adsorption. High-pressure membranes like Nf.0 and Nf.70 have a high promise in TrOC removal f.om contaminated water.

关键词： Trace organic compounds (TrOCs) Nanof.ltration (Nf. Adsorption Membrane properties Water treatment

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Gallic acid ameliorates colitis by modulating the Treg/Th17 balance via microbiota-derived secondary bile acids

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f.od Science and Human Wellness 2024年

作者： Xiao Zhang Yun Leng Qian Zhang Hansheng Yu Ziqiong Liao Jiaxuan Xia Chong Ma Kun Liu yuefeng Zhang Yanjun Hong Hao Li Zhiyong xie School of.Pharmaceutical Sciences (Shenzhen)， Sun Yat-sen University The Seventh Af.iliated Hospital， Sun Yat-sen University Shenzhen Key Laboratory of.Chinese Medicine Active Substance Screening and Translational Research， Sun Yat-sen University

Gallic acid (GA)， a plant phenol ubiquitously present in f.uits and vegetables， has demonstrated ef.icacy in ameliorating ulcerative colitis (UC). Despite previous reports， the precise mechanism of.GA's therapeutic action remains elusive. Herein， the present work aims to delineate the mechanism underlying the anti-UC ef.ects of.GA by f.cusing on the interplay of.gut microbiota， microbial and host cometabolites， and gut immune regulation. The f.ndings revealed that GA treatment improved the colitis symptoms and systematic inf.ammatory response， reliant on gut microbiota， as evidenced by microbiota depletion and f.cal microbiota transplantation. According to the 16s rDNA sequencing results， GA altered the gut microbiota community structure and upregulated the biosynthesis of.secondary bile acids (SBAs). Metabolomics and f.ow cytometry analysis (f.S) revealed a substantial increase in SBAs production， including UDCA， LCA， 3-oxo-LCA and IsoalloLCA， which f.rther upregulated the proportion of.regulatory T (Treg) cells and downregulated the proportion of.T helper type 17 (Th17) cells in the colon， ultimately resulting in an improved Treg/Th17 balance. f.rther f.S and real-time quantitative PCR assays provided mechanistic insights， demonstrating that UDCA and IsoalloLCA f.cilitate Treg cell dif.erentiation through the upregulation of.nuclear hormone receptor 4A1 (NR4A1). This research elucidated that GA ef.ectively mitigates colitis by modulating the Treg/Th17 balance， f.cilitated by the enhanced synthesis of.microbiota-derived SBAs. These insights unveil innovative pathways through which GA exerts its anti-UC ef.ects， emphasizing the potential therapeutic benef.ts of.incorporating a GA-enriched diet into UC management.

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三苯基膦/NBS协同促进酮肟贝克曼重排反应——酰胺类化合物的合成研究

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广西师范大学学报（自然科学版） 2024年第2期42卷 152-158页

作者：谢建武叶跃峰谢玄升陕西科技大学生物与医药学院陕西西安710021

Beckmann重排反应在有机合成反应中具有十分重要的价值,但由于苛刻的反应条件、催化剂的难制备和毒性等,严重制约该反应的应用。本文提供一种催化酮肟Beckmann重排反应的新型催化体系,以Ph 3 P/NBS(N-溴代丁二酰亚胺,NBS)协同催化酮肟发... 详细信息

Beckmann重排反应在有机合成反应中具有十分重要的价值,但由于苛刻的反应条件、催化剂的难制备和毒性等,严重制约该反应的应用。本文提供一种催化酮肟Beckmann重排反应的新型催化体系,以Ph 3 P/NBS(N-溴代丁二酰亚胺,NBS)协同催化酮肟发生Beckmann重排合成一系列酰胺,对制备得到的化合物进行表征和测试,并给出可能的反应机理。实验结果表明,本文方法能高效、高收率地合成一系列酰胺(产率76%~99%),制备得到的4-苯基二苯甲酮类酰胺和4-硝基二苯甲酮类酰胺有较大的Stoke’s位移(分别是118和151 nm),说明通过调节芳基上的取代基,可以有效地调整该类化合物分子极性方向,有利于荧光增大分子内的电荷转移效应,增大Stoke’s位移,为该类化合物在荧光探针方面的应用奠定了理论基础。本文方法具有腐蚀性低、反应产率高、可以放大、反应时间短以及后处理简单等优点,为Beckmann重排反应的推广应用提供了理论依据。

关键词：酰胺 Beckmann重排 N-溴代丁二酰亚胺酮肟三苯基磷

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苯磺酸瑞马唑仑复合静脉麻醉在宫颈环形电切术中的临床应用

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智慧健康 2024年第3期10卷 193-196页

作者：谢月峰泰州市第四人民医院麻醉科江苏泰州225300

目的探究在宫颈环形电切术中应用苯磺酸瑞马唑仑复合静脉麻醉的效果。方法本次试验选取本院在2022年6月—2023年5月收治的60例行宫颈环形电切术患者,并将其作为数据分析对象,分组时按麻醉方案不同共分为对照和观察两组,每组30例。对... 详细信息

目的探究在宫颈环形电切术中应用苯磺酸瑞马唑仑复合静脉麻醉的效果。方法本次试验选取本院在2022年6月—2023年5月收治的60例行宫颈环形电切术患者,并将其作为数据分析对象,分组时按麻醉方案不同共分为对照和观察两组,每组30例。对照组实施舒芬太尼加丙泊酚方式,观察组在对照组基础上实施苯磺酸瑞马唑仑复合静脉麻醉,比较两组临床相关指标,心率(HR)、平均动脉压(MAP),苏醒质量,不良反应。结果两组对比临床相关指标,观察组术中失血量、术中输液量与对照组差异无统计学意义(P>0.05),丙泊酚用量少于对照组,差异显著有统计学意义(P0.05);两组MAP各时间点数值比较,观察组较高,差异显著有统计学意义(P<0.05)。两组对比苏醒质量,观察组各时间点改良警觉/镇静(MOAA/S)评分均高于对照组,差异显著有统计学意义(P<0.05)。两组对比不良反应,观察组明显低于对照组,差异显著有统计学意义(P<0.05)。结论在对行宫颈环形电切术患者麻醉时,给予苯磺酸瑞马唑仑复合静脉麻醉,效果较为显著,在临床麻醉方案中值得大范围推广与实施。

关键词：苯磺酸瑞马唑仑复合静脉麻醉宫颈环形电切术丙泊酚

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Evaluate HAA removal in biologically active carbon f.lters using the ICR database

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f.ontiers of.Environmental Science & Engineering 2011年第4期5卷 489-496页

作者： Hsin-hsin TUNG yuefeng f.xie Graduate Institute of.Environmental Engineering Taiwan UniversityTaipei 10673China Environmental Engineering The Pennsylvania State UniversityMiddletownPA 17057USA

The ef.ects of.biologically active carbon(BAC)f.ltration on haloacetic acid(HAA)levels in plant ef.luents and distribution systems were investigated using the United States Environmental Protection Agency’s Inf.rmation Collection Rule(ICR)*** results showed that average HAA5 concentrations in all locations were 20.4μg·L^(-1)and 29.6μg·L^(-1)in ICR plants with granular activated carbon(GAC)and ICR plants without GAC process,*** plants without GAC,the highest HAA levels were observed in the quarters of.April to June and July to ***,f.r plants with GAC,the highest HAA levels were observed in the quarters of.April to June and January to *** HAA level prof.le inversely correlated well with water temperature,or biologic *** GAC plants,simulated distribution samples matched well with distribution system equivalent samples f.r Cl3AA and *** plants with and without GAC,simulated distribution samples overestimated readily biodegradable HAAs in distribution *** study indicated that through HAA biodegradation,GAC process plays an important role in lowering HAA levels in f.nished drinking water.

关键词： biologically active carbon(BAC) disinf.ction byproduct(DBP) granular activated carbon(GAC) haloacetic acid(HAA) Inf.rmation Collection Rule(ICR)

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Using loose nanof.ltration membrane f.r lake water treatment:A pilot study

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f.ontiers of.Environmental Science & Engineering 2021年第4期15卷 251-261页

作者： Danyang Liu Johny Cabrera Lijuan Zhong Wenjing Wang Dingyuan Duan Xiaomao Wang Shuming Liu yuefeng f.xie State Key Joint Laboratory of.Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Chengdu Xingrong Environmental Co. Ltd.Chengdu610041China Civil and Environmental Programs Penn State UniversityMiddletownPA17057USA

Nanof.ltration(Nf.using loose membranes has a high application potential f.r advanced treatment of.drinking water by selectively removing contaminants f.om the water,while membrane f.uling remains one of.the biggest problems of.the *** paper reported a seven-month pilot study of.using a loose Nf.membrane to treat a sand f.ltration ef.luent which had a relatively high turbidity(∼0.4 NTU)and high concentrations of.organic matter(up to 5 mg/L as TOC),hardness and *** showed that the membrane demonstrated a high rejection of.TOC(byf.two pesticides(54%–82%)while a moderate rejection of.both calcium and magnesium(∼45%)and a low rejection of.total dissolved solids(∼27%).The membrane elements suf.ered f.om severe membrane f.uling,with the membrane permeance decreased by 70%af.er 85 days *** membrane f.uling was dominated by organic f.uling,while biological f.uling was *** f.uling was mainly caused by deposition of.aluminum-bearing *** inorganic f.ulants were minor contents on membrane,their contribution to overall membrane f.uling was *** f.uling was not unif.rm on *** contents of.organic and inorganic f.ulants were the highest at the inlet and outlet region,respectively,the severity of.membrane f.uling increased f.om the inlet to the outlet region of.membrane element with a dif.erence higher than 30%.While alkaline cleaning was not ef.ective in removing the membrane f.ulants,the use of.ethylenediamine tetraacetate(EDTA)at alkaline conditions could ef.ectively restore the membrane permeance.

关键词： Nanof.ltration Drinking water Membrane f.uling Aluminum carryover Chemical cleaning

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Powertrain parameter matching and optimal design of.dual-motor driven electric tractor

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International Journal of.Agricultural and Biological Engineering 2019年第1期12卷 33-41页

作者： Yanni Chen Bin xie yuefeng Du Enrong Mao College of.Engineering China Agricultural UniversityBeijing 100083China

The rationality of.powertrain parameter design has a signif.cant inf.uence on the traction perf.rmance and economic perf.rmance of.electric *** present,researches on powertrain parameter design mainly f.cus on electric vehicles,and electric agricultural machinery draw much less ***,a method of.powertrain parameter matching and optimization design f.r electric tractor was proposed in this paper,which was based on dual-motor coupling drive *** particle swarm optimization(PSO)algorithm based on mixed penalty f.nction was used f.r parameter *** optimization design was programmed using MATLAB.A simulation dynamic model with optimization design variables of.electric tractor powertrain was established based on MATLAB/*** with the simulation results bef.re optimization,the objective f.nctions were optimized and the traction perf.rmance of.electric tractor was improved,which indicated the ef.ectiveness of.the proposed method.

关键词： electric tractor parameter matching design parameter optimization design powertrain traction perf.rmance

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Pilot study f.r the treatment of.sodium and f.uoridecontaminated groundwater by using high-pressure membrane systems

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f.ontiers of.Environmental Science & Engineering 2015年第1期9卷 155-163页

作者： Xiaomao WANG Hongwei YANG Zhenyu LI Shaoxia YANG yuefeng xie State Key Joint Laboratory of.Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China National Engineering Laboratory f.r Biomass Power Generation Equipment School of Renewable Energy North China Electric Power University Beijing 102206 China Environmental Engineering Programs The Pennsylvania State University Middletown PA 17057 USA

High-pressure membrane process is one of.the cost-ef.ective technologies f.r the treatment of.groundwater containing excessive dissolved solids. This paper reports a pilot study in treating a typical groundwater in Huaibei Plain containing excessive sodium, sulf.te and f.uoride ions. Three membrane systems were set up and two brands of.reverse osmosis （RO）, f.ur low-pressure RO （LPRO） and one tight nanof.ltration （Nf. membranes were tested under this pilot study. An apparent recovery rate at about 75% was adopted. Cartridge f.ltration, in combination with dosing antiscalent, was not suf.icient to reduce the f.uling potential of.the raw water. All RO and LPRO systems （except f.r the two severely af.ected by membrane f.uling） demonstrated similar rejection ratios of.the conductivity @98.5%）, sodium （-98.5%） and f.uoride （-99%）. Membrane f.uling substantially reduced the rejection perf.rmance of.the f.uled membranes. The tight Nf.membrane also had a good rejection on conductivity （95%）, sodium （94%） and f.uoride （95%）. All membranes rejected sulf.te ion almost completely （more than 99%）. The electricity consumptions f.r the RO, LPRO and Nf.systems were 1.74, 1.10 and 0.72 kWh·m3 treated water, respectively. The estimated treatment costs by using typical RO, LPRO and tight Nf.membrane systems were 1.21, 0.98 and 0.96 CNY·m 3 f.nished water, respectively. A treatment process consisting of.either LPRO or tight Nf.f.cilities f.llowing multi-media f.ltration was suggested.

关键词： reverse osmosis (RO) nanof.ltration (Nf.,water quality standards sodium f.uoride cost estimation

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新一代单对线以太网NG-SPE技术及在流程工业数据通信中的应用

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石油化工自动化 2024年第2期60卷 1-7页

作者：魏毅谢建平吴悦峰穆童中国寰球工程有限公司北京分公司华为技术有限公司

回顾了流程工业两线制通信技术的发展历程，包括4～20 mA,HART,RS-485和新兴的APL/10BASE-T1L单对线以太网通信技术，以及各自的优缺点、面临的问题和后续的演进方向；重点介绍了新一代单对线以太网NG-SPE技术，以及该技术在带宽、距离... 详细信息

回顾了流程工业两线制通信技术的发展历程，包括4～20 mA,HART,RS-485和新兴的APL/10BASE-T1L单对线以太网通信技术，以及各自的优缺点、面临的问题和后续的演进方向；重点介绍了新一代单对线以太网NG-SPE技术，以及该技术在带宽、距离、节点数和供电四个方面的均衡表现。通过与其他主流单对线技术对比后表明，新一代单对线以太网NG-SPE技术可实现在1 km内，通信速率为100 Mibit/s的数据传输，15节点接入，点到多点供电，并支持多种线缆和拓扑结构，可应用于流程工业、物联等领域，取代低速总线，利用已有线缆，实现高速远距离总线通信。

关键词：两线制通信技术单对线以太网 NG-SPE技术数据传输

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Disinf.ction byproducts in drinking water and regulatory compliance： A critical review

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f.ontiers of.Environmental Science & Engineering 2015年第1期9卷 3-15页

作者： Xiaomao WANG Yuqin MAO Shun TANG Hongwei YANG yuefeng E xie State Key Joint Laboratory of.Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Environmental Engineering Programs The Pennsylvania State University Middletown PA 17057 USA

Disinf.ction by-products （DBPs） are regulated in drinking water in a number of.countries. This critical review f.cuses on the issues associated with DBP regulatory compliance, including methods f.r DBP analysis, occurrence levels, the regulation comparison among various countries, DBP compliance strategies, and emerging DBPs. The regulation comparison between China and the United States （US） indicated that the DBP regulations in China are more stringent based on the number of.regulated compounds and maximum levels. The comparison assessment using the Inf.rmation Collection Rule （ICR） database indicated that the compliance rate of.500 large US water plants under the China regulations is much lower than that under the US regulations （e.g. 62.2% versus 89.6% f.r total trihalomethanes）. Precursor removal and alternative disinf.ctants are common practices f.r DBP regulatory compliance. DBP removal af.er f.rmation, including air stripping f.r trihalomethane removal and biodegradation f.r haloacetic acid removal, have gained more acceptance in DBP control. f.rmation of.emerging DBPs, including iodinated DBPs and nitrogenous DBPs, is one of.unintended consequences of.precursor removal and alternative disinf.ction. At much lower levels than carbonaceous DBPs, however, emerging DBPs have posed higher health risks.

关键词： Disinf.ction byproducts (DBPs) drinkingwater standards regulatory compliance alternative disinf.ction inf.rmation collection rule (ICR) emerging DBPs

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