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Amino-functionalized UiO-66-doped mixed matrix membranes with high permeation performance and fouling resistance

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Chinese Journal of Chemical Engineering 2024年第3期67卷 68-77页

作者： Yi Zhang Di liu Zhaoli Wang Junjian Yu yanyin Cheng Wenjing li Zhe Wang Hongzhe Ni Yuchao Wang School of Chemical Engineering Changchun University of TechnologyChangchun 130012China Advanced Institute of Materials Science Changchun University of TechnologyChangchun 130012China Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012China School of Chemistry and life Science Changchun University of TechnologyChangchun 130012China

For the reduction of bovine serum proteins from wastewater,a novel mixed matrix membrane was prepared by functionalizing the substrate material polyaryletherketone(PAEK),followed by carboxyl groups(C-SPAEKS),and then adding amino-functionalized UiO-66-NH_(2)(Am-UiO-66-NH_(2)).Aminofunctionalization of UiO-66 was accomplished by melamine,followed by an amidation reaction to immobilize Am-UiO-66-NH_(2),which was immobilized on the surface of the membrane as well as in the pore channels,which enhanced the hydrophilicity of the membrane surface while increasing the negative potential of the membrane *** nanoparticle-loaded ultrafiltration membrane has good permeation performance,with a pure water flux of up to 482.3 L·m^(-2)·h^(-1) for C-SPAEKS/AmUiO-66-NH_(2) and a retention rate of up to 98.7%for bovine serum albumin(BSA)-contaminated ***,after several hydrophilic modifications,the flux recovery of BSA contaminants by this series of membranes increased from 56.2%to 80.55%of pure *** results of ultra-filtration flux time tests performed at room temperature showed that the series of ultrafiltration membranes remained relatively stable over a test time of 300 ***,the newly developed mixed matrix membrane showed potential for high efficiency and stability in wastewater treatment containing bovine serum proteins.

关键词： Ultrafiltration Mixed matrix membranes Amino functionalization Hydrophilic modification Negatively charged

Amine-functionalized metal organic framework@graphene oxide as filler in PAEK-containing carboxyl group membrane for ultrafiltration with ultra-high permeability and strong fouling resistance

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Chinese Journal of Chemical Engineering 2024年第6期70卷 93-103页

作者： Zhaoli Wang Wenjing li Yi Zhang yanyin Cheng Junjian Yu Tianming Dong Xiaoyu Chi Di liu Zhe Wang School of Chemistry and life Science Changchun University of TechnologyChangchun 130012China Advanced Institute of Materials Science Changchun University of TechnologyChangchun 130012China Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012China

Achieving high fouling resistance and permeability using membrane separation technology in water treatment processes remains a *** this work,a novel mixed-matrix membrane(MMM)(poly(arylene ether ketone)[PAEK]-containing carboxyl groups[PAEK-COOH]/UiO-66-NH_(2)@graphene oxide[GO])with superb fouling resistance and high permeability was prepared by the nonsolvent-induced phase separation method,by in-situ growth of UiO-66-NH_(2) on the GO layer,and by preparing hydrophilic *** the basis of the structure and performance analysis of the MMM,the maximum water flux reached 591.25 L·m^(-2)·h^(-1) for PAEK-COOH/UiO-66-NH_(2)@GO,whereas the retention rate for bovine serum albumin increased from 85.40%to 94.87%.As the loading gradually increased,the hydrophilicity of the MMMs increased,significantly enhancing their fouling *** strongest anti-fouling ability observed was 94.74%,which was 2.02 times greater than that of the pure *** the same time,the MMMs contained internal amide and hydrogen bonds during the preparation process,forming a cross-linked structure,which further enhanced the mechanical strength and chemical *** summary,the MMMs with high retention rate,strong permeability,and anti-fouling ability were successfully prepared.

关键词： Poly(arylene ether ketone)-containing Carboxyl groups(PAEK-COOH) UiO-66-NH_(2)@graphene oxide Hydrophilic modification Ultra-high selectivity Strong anti-fouling

Manganese-Zeolitic Imidazolate Frameworks-90 with High Blood Circulation Stability for MRI-Guided Tumor Therapy

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Nano-Micro Letters 2019年第4期11卷 97-113页

作者： Zhenqi Jiang Bo Yuan Nianxiang Qiu Yinjie Wang li Sun Zhenni Wei yanyin li Jianjun Zheng Yinhua Jin Yong li Shiyu Du Juan li Aiguo Wu Cixi Institute of Biomedical Engineering CAS Key Laboratory of Magnetic Materials and Devices&Key Laboratory of Additive Manufacturing Materials of Zhejiang ProvinceNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hwa Mei Hospital University of Chinese Academy of SciencesNingbo 315010People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Zeolitic imidazolate frameworks(ZIFs)as smart drug delivery systems with microenvironment-triggered release have attracted much attention for tumor ***,the exploration of ZIFs in biomedicine still encounters many issues,such as inconvenient surface modification,fast drug release during blood circulation,undesired damage to major organs,and severe in vivo *** address the above issues,we developed an Mn-ZIF-90 nanosystem functionalized with an originally designed active-targeting and pH-responsive magnetic resonance imaging(MRI)Y1 receptor ligand[Asn28,Pro30,Trp32]-NPY(25-36)for imaging-guided tumor *** Y1 receptor ligand modification,the Mn-ZIF-90 nanosystem exhibited high drug loading,better blood circulation stability,and dual breast cancer cell membrane and mitochondria targetability,further favoring specific microenvironment-triggered tumor ***,this nanosystem showed promising T1-weighted magnetic resonance imaging contrast in vivo in the tumor ***,this nanosystem with fast clean-up had almost no obvious toxicity and no damage occurred to the major organs in ***,this nanosystem shows potential for use in imaging-guided tumor therapy.

关键词： Zeolitic imidazolate frameworks-90 Drug delivery Magnetic resonance imaging pH-responsive release Y1 receptor ligand

四阶椭圆特征值问题的有效谱Galerkin方法

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四川师范大学学报（自然科学版） 2015年第2期38卷 249-254页

作者：李艳琴安静贵州师范学院数学与计算机科学学院贵州贵阳550018 贵州师范学院贵州省高校工业物联网工程技术研究中心贵州贵阳550018 贵州师范大学数学与计算机科学学院贵州贵阳550001

给出四阶椭圆特征值问题基于Legendre-Galerkin逼近的有效的谱方法,首先选择一组适当的基函数,使得离散变分格式的矩阵形式尽可能是稀疏的,然后分别在二维和三维情况下推导离散变分格式基于张量积的矩阵形式,通过利用矩阵分解能够迅速... 详细信息

给出四阶椭圆特征值问题基于Legendre-Galerkin逼近的有效的谱方法,首先选择一组适当的基函数,使得离散变分格式的矩阵形式尽可能是稀疏的,然后分别在二维和三维情况下推导离散变分格式基于张量积的矩阵形式,通过利用矩阵分解能够迅速地求出特征值和特征向量,并作出误差估计,最后给出数值算例,数值结果表明该方法是稳定的和有效的.

关键词：四阶特征值问题 Legendre-Galerkin逼近张量积误差估计

融合小波变换和自适应Kalman滤波在GPS监测中的应用研究

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测绘与空间地理信息 2020年第1期43卷 89-92页

作者：李炎寅苏州工业园区测绘地理信息有限公司

针对自适应卡尔曼滤波只适用于滤除高斯分布的白噪声,本文提出了融合小波变换和自适应卡尔曼滤波的算法。该算法利用小波变换的多尺度分解,将GPS高频的监测时间序列进行多层分解,重构出新的GPS监测时间序列,将其作为新的自适应卡尔曼滤... 详细信息

针对自适应卡尔曼滤波只适用于滤除高斯分布的白噪声,本文提出了融合小波变换和自适应卡尔曼滤波的算法。该算法利用小波变换的多尺度分解,将GPS高频的监测时间序列进行多层分解,重构出新的GPS监测时间序列,将其作为新的自适应卡尔曼滤波初始值,进行滤波处理。将融合算法的滤波结果与单一的自适应卡尔曼滤波结果进行对比分析,结果表明融合算法的滤波效果较为显著。同时,对融合算法滤除的噪声信息进行统计分析,结果表明融合算法滤除的噪声符合正态分布,进一步说明了该融合算法的有效性,为GPS的高频率、高精度的监测提供了技术支持。

关键词：小波变换自适应卡尔曼滤波 GPS监测直方图统计

Bacillus tropicus来源β-D-呋喃果糖苷酶基因的克隆与表达及其酶学特性研究

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河南工业大学学报（自然科学版） 2024年第2期45卷 1-10页

作者：王润任彤宋衍银沈艺梅李雨禅刘梦昊李思霆陈洲北京工商大学食品与健康学院北京100048

为获得新β-D-呋喃果糖苷酶资源并探究其酶学性质及在转化糖中的应用潜力,挖掘出Bacillus tropicus来源的β-D-呋喃果糖苷酶基因BtFFase8,成功合成后表达在大肠杆菌宿主中。通过数据库筛选β-D-呋喃果糖苷酶的基因序列,将基因克隆至载体... 详细信息

为获得新β-D-呋喃果糖苷酶资源并探究其酶学性质及在转化糖中的应用潜力,挖掘出Bacillus tropicus来源的β-D-呋喃果糖苷酶基因BtFFase8,成功合成后表达在大肠杆菌宿主中。通过数据库筛选β-D-呋喃果糖苷酶的基因序列,将基因克隆至载体pET-28a(+)中。将获得的重组质粒转化至大肠杆菌BL21,构建重组菌株大肠杆菌BL21/pET28a-BtFFase8。采用亲和层析纯化克隆酶,用SDS-PAGE法分析蛋白分子量,通过葡萄糖试剂盒检测酶水解产物的能力得到酶活力,用福林酚试剂法测定蛋白质含量。克隆酶BtFFase8的分子质量为57.0 kDa,对蔗糖底物的比酶活力为13.4 U/mg;BtFFase8的最适pH和最适温度分别为pH 6.5和45℃,且在pH 5.0~8.0和40℃及以下温度保持酶活力稳定,残余酶活力大于80%;BtFFase8能耐受碱性蛋白酶、酸性蛋白酶和胰蛋白酶的水解,残余酶活力大于70%。BtFFase8的发现及克隆酶优良的酶学功能为其未来应用于食品加工,特别是在转化糖的生产中奠定了良好的理论基础。

关键词： β-D-呋喃果糖苷酶 Bacillus tropicus 异源表达酶学性质转化糖

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小波分析在王家岗油田处理解释中的应用

测井技术 2000年第3期24卷 220-222页

作者：李艳英胜利油田测井公司

王家岗油田为一复式油气集聚油藏 ,其中有相当一部分的储量和产量来自薄储层。介绍了在不改变仪器探测深度的基础上 ,应用小波分析提高测井曲线纵向分辨率 ,使处理后的测井值更接近地层的真值 ,使精细求取储层参数和小层对比成为可能。... 详细信息

王家岗油田为一复式油气集聚油藏 ,其中有相当一部分的储量和产量来自薄储层。介绍了在不改变仪器探测深度的基础上 ,应用小波分析提高测井曲线纵向分辨率 ,使处理后的测井值更接近地层的真值 ,使精细求取储层参数和小层对比成为可能。应用该方法对王家岗油田 3口老井进行重新处理 ,效果良好。

关键词：小波分析地层对比测井曲线测井解释储集层

Healing and Destruction in Jhumpa Lahiri's“Hell-Heaven”——A Structuralist Perspective

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校园英语 2012年第12期 175-175页

作者：王欷燕 li yanyin 西南财经大学西南财经大学经贸外语学院

The short story"Hell-Heaven",taken from Jhumpa Lahiri’scollection Unaccustomed Earthi,presents contrasting images and associations in its title,and a search through the whole text ren-ders a display of many binary oppositions consistent with the *** to the structuralist theory,binary oppositions are two diametrically opposing ideas that are the most basic building blocks of structure in a textii.A structuralist reading of"Hell-Heaven"yields evidence of the binary opposition between

关键词： A Structuralist Perspective Healing and Destruction in Jhumpa Lahiri’s Hell-Heaven

臂丛MRN在诊断脱髓鞘合并轴索损伤CIDP中的应用

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中国医学计算机成像杂志 2024年第3期30卷 365-371页

作者：邓燕王卫卫杨杨赵彦胤李雅洁刘含秋复旦大学附属华山医院放射科上海市200040 复旦大学附属华山医院神经内科上海市200040

目的:探讨臂丛磁共振神经成像(MRN)在诊断脱髓鞘合并轴索损伤的慢性炎性脱髓性多发性神经根神经病(CIDP)中的应用价值。方法:收集2016—2021年在我院确诊的CIDP患者29例,根据神经电生理检查分为脱髓鞘组及脱髓鞘合并轴索损伤组。在臂丛... 详细信息

目的:探讨臂丛磁共振神经成像(MRN)在诊断脱髓鞘合并轴索损伤的慢性炎性脱髓性多发性神经根神经病(CIDP)中的应用价值。方法:收集2016—2021年在我院确诊的CIDP患者29例,根据神经电生理检查分为脱髓鞘组及脱髓鞘合并轴索损伤组。在臂丛MRN图像上测量所有患者臂丛神经根(C5~C8)最大直径以及神经-肌肉T2WI信号强度比,收集所有患者的临床资料,进行组间差异性分析和组内相关性分析,并绘制受试者工作特征(ROC)曲线。结果:脱髓鞘合并轴索损伤组CIDP患者臂丛神经根最大直径大于脱髓鞘组,其中C5(P=0.011)、C6(P=0.046)、C8(P=0.001)神经根的差异具有统计学意义。ROC曲线分析结果显示,C8神经根的最大直径具有较好的诊断效能,其ROC曲线下面积(AUC)为0.851,相应的阈值为4.36 mm。脱髓鞘合并轴索损伤组CIDP患者C6(r=0.634,P=0.02)、C7(r=0.605,P=0.029)神经根最大直径与脑脊液蛋白水平呈中度正相关,C7神经根最大直径(r=-0.567,P=0.043)以及C8神经根的神经-肌肉T2WI信号强度比(r=-0.598,P=0.031)与发病年龄呈中度负相关。结论:臂丛MRN有助于识别脱髓鞘合并轴索损伤的CIDP患者,C8神经根的最大直径可能具有较好的诊断效能。

关键词：磁共振神经成像慢性炎性脱髓鞘性多发性神经根神经病臂丛神经轴索损伤