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Recovery of Copper(II) and Nickel(II) from Plating Wastewater by Solvent Extraction 被引量:17
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作者 李立清 钟宏 +1 位作者 曹占芳 袁露 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第6期926-930,共5页
The solvent extraction technology, was applied to recover Cu^2+ and Ni^2+ from plating wastewater.Lix984N was chosen as the extractant due to-its gooff extraction performance. The influence parame-ters were examlned... The solvent extraction technology, was applied to recover Cu^2+ and Ni^2+ from plating wastewater.Lix984N was chosen as the extractant due to-its gooff extraction performance. The influence parame-ters were examlned. The results show that the separation of Cu^2+ and Ni" from sulphate medium can be realized by adjusting pH value with the help of Lix984N. For extracting Cu^2+ and Ni^2+, the optimal pH values are 4 and 10.5, and the maximal extraction percentages are 92.9% and 93.0%, respectively .With recovered Cu^2+ and Ni^2+ stripped in 170g.L^ -1 and 200 g.L^-1 H2SO4 medium, the stripping percentages of Cu^2+ and Ni^2+ are 92.9% and 93.0%, respectively. This method is simple and can be used to recover Cu^2+ and Ni^2+ from plating wastewater. And a flow sheet for separation of Cu^2+ and Ni^2+ is presented. 展开更多
关键词 RECOVERY copper NICKEL solvent extraction plating wastewater
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SYNTHESIS AND STRUCTURE OF A 2D SHEET-LIKE COPPER(II) COMPLEX WITH BRIDGING PYRIDINE-4-CARBOXYLATE AND TRANS-OXAMIDATE LIGANDS
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作者 Mei Fang Wu Zhong Ning CHAN +1 位作者 Jun QIU and Wen Xia TANG(State Key Laboratory of Coordination Chemistry,Nanjing University. Nanjing 210008)Zhe Ming WANG Shi Xiong LIU and Jin Ling HUANG(Center Laboratory, Fuzhou University, Fuzhou 350002) 《Chinese Chemical Letters》 SCIE CAS CSCD 1994年第8期711-712,共2页
A complex polymer [Cu2(oxen)(pic)(H20)]n(Clo4)·2nHH2O, there oxen and pic are N.N' -bis(2aminoethyt )oxamide and Pyridine-4-carboxytate, respectivety, was synthesized. It crystallizes in the monoctinic space ... A complex polymer [Cu2(oxen)(pic)(H20)]n(Clo4)·2nHH2O, there oxen and pic are N.N' -bis(2aminoethyt )oxamide and Pyridine-4-carboxytate, respectivety, was synthesized. It crystallizes in the monoctinic space group P21/c, with a=10.420(2) A. b=13. 118(2) A, c=14 .863(5) A. β=93.05(2)°, and z=4. The structure of this complex consists of 2D network of copper(II) ions bridged by bis-tridentate oxen in transconformation, and by pyridine-4-carboxylate in which the pyridine ring acts as a monodentate group whereas the carboxylate as a tridentate group and bonds to three different copper centres in a novel fashion. The repeating asymmetric unit is a binuclear copper(II) fragment with one of the copper centre locating in a lengthening octahedrat environment, whereas the other in a distorted tetragonal pyramid geometry. 展开更多
关键词 ii copper COMPLEX LIKE WITH AND BRIDGING
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CRYSTAL STRUCTURE OF THE COPPER(II) COMPLEX OF NEW MACROCYCLIC DIOXOTETRAAMINE LIGAND FUNCTIONALIZED WITH 8-METHYL QUINOLINE PENDANT
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作者 Xian He BU Dao Li AN Man Xue YUAN and Yun Ti CHEN (Department of Chemistry, Nankai University,Tianjin 300071) 《Chinese Chemical Letters》 SCIE CAS CSCD 1994年第12期1055-1056,共2页
The copper (II) complex (1) of a new Iigand 4- (quinolin-8-ylmethyl)- 1, 4, 7. 10-tetraazacycoltridecane-11. 13-dione (L) has been syntehsized and its crystal structure determined. It is of orthorhomic crystal system ... The copper (II) complex (1) of a new Iigand 4- (quinolin-8-ylmethyl)- 1, 4, 7. 10-tetraazacycoltridecane-11. 13-dione (L) has been syntehsized and its crystal structure determined. It is of orthorhomic crystal system and Pcad space group with a=16.260 (3), b=7. 739 (2). c=27. 530 (9) A, Mr=416. 97, Z=8. Dx=1. 595 g/cm3,μ=12. 876 cm-1, and F(000)=1736. The final R factor is 0. 061 for 2594 observed reflections with I>3σ(I). The Cu .atom is five coordinated to form a distorted square pyramid geometry in which N(11) of the pendant is at apical site. 展开更多
关键词 ii THE OF NEW STRUCTURE COMPLEX copper
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Recombinogenic Effect of the Ternary Complex of Copper(II) with Doxycycline and 1,10-Phenanthroline on Somatic Cells of Drosophila melanogaster
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作者 Jeyson Cesary Lopes Luisa Mariana Melo Guimaraes +2 位作者 Julio Cesar Nepomuceno Sandra Morelli Robson Jose de Oliveira Junior 《Journal of Pharmacy and Pharmacology》 2018年第5期531-540,共10页
In the search for new anti-tumor agents, exploiting features such as the flexibility of coordination modes of metals have become an alternative strategy for synthesizing pharmaceuticals. It has been shown that the Cu... In the search for new anti-tumor agents, exploiting features such as the flexibility of coordination modes of metals have become an alternative strategy for synthesizing pharmaceuticals. It has been shown that the CuDP (copper(II), doxycycline, and 1,10-phenanthroline) complex cleaves DNA strands by an oxidative mechanism and by intercalating the major groove, resulting in a cytotoxic action. The objective of this study was to assess the mutageinc/recombinogenic effects of the CuDP complex in vivo using the SMART (Somatic Mutation and Recombination Test) in Drosophila melanogaster. Treatments were carried out with third instar larvae at the standard cross and high bioactivation cross using three concentrations of CuDP (6.92, 13.84 or 27.67 mM). The mutagenic doxorubicin (0.4 mM) was used as a positive control and reverse osmosis water as a negative control. For each compound, marked trans-heterozygous and balanced heterozygous individuals were analyzed to determine the mutational and recombinogenic events occurring in the cells, We found that CuDP significantly increased the frequencies of mutant cells in both standard and high bioactivation crosses, mostly by induction of recombination. These data show that CuDP is a direct recombinogenic agent that is independent of bioactivation, 展开更多
关键词 copper recombination MUTATION Drosophila melanogaster.
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Preliminary Investigation of Copper(II) Ion Binding or Complex Coordination in Lysozeme Molecules
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作者 Kou Takahashi Ryotaro Miyazaki +2 位作者 Daisuke Nakane Temitayo O. Aiyelabola Takashiro Akitsu 《Journal of Materials Science and Chemical Engineering》 2024年第4期98-103,共6页
Hydrophobic Val derivative Schiff base copper(II) complexes and dipeptide (AlaAla, GlyGly) derivative Schiff base copper(II) complexes were introduced into egg white lysozyme. X-ray crystal structure analysis revealed... Hydrophobic Val derivative Schiff base copper(II) complexes and dipeptide (AlaAla, GlyGly) derivative Schiff base copper(II) complexes were introduced into egg white lysozyme. X-ray crystal structure analysis revealed amino acid derivative Schiff base copper(II) complexes were obtained. Herein we discuss primarily on the binding mode of copper(II) of the complexes obtained with egg white lysozyme. The electron density of copper(II) ions was confirmed by X-ray crystal structure analysis. The Val derivative Schiff base copper(II) complex was weakly bound at Arg114 of egg white lysozyme. In other copper(II) complexes, binding of copper(II) ions with dissociated ligands to various residues was observed. The binding sites of copper(II) ions were compared with computational scientific predictions. 展开更多
关键词 copper Schiff Base LYSOZYME Metal-Protein Binding Computational Methods
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Stoichiometry and Stability Constant Values for Copper (II) Chelates with Ethylene Diamine in Deep Eutectic Solvents (DES) (Ethaline) Solutions
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作者 Khalid El Ttaib Abdolhadi Benhmid Rifat Hasan Omar 《Open Journal of Applied Sciences》 2024年第9期2592-2609,共18页
In this study we used the deep eutectic solvents (ionic liquids) to investigate the reaction between copper (II) with ethylene diamine (en). Two of the existing methods for analyzing spectrophotometric measurements ha... In this study we used the deep eutectic solvents (ionic liquids) to investigate the reaction between copper (II) with ethylene diamine (en). Two of the existing methods for analyzing spectrophotometric measurements have been applied for establishing, the stoichiometry and whenever possible, the stability constants of the chelates formed. The method of continuous variations was necessary to determine first whether, the metal ion and the ligand ethylene diamine form one or more than one chelate, when more than one chelate formed, the results obtained depend on the wavelength and for meaningful conclusions the wavelengths were carefully selected. The empirical formulae of the chelates were further substantiated by the molar ratio method. The effect of time and temperature on the formation and stability of these chelates in solution is also studied. The stability constants, K1 and K2 for the copper (II) chelates were calculated, though reliable, and are comparable to literature values. 展开更多
关键词 CU(ii) Ethylene Diamine (en) Deep Eutectic Solvents Job’s Method Ionic Liquids and Stability Constant
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基于区间毕达哥拉斯犹豫模糊熵和交叉熵的ELECTRE II决策方法
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作者 杨威 李静 《工程数学学报》 CSCD 北大核心 2024年第3期525-539,共15页
针对属性权重完全未知或部分已知,属性值为区间毕达哥拉斯犹豫模糊数的多属性决策问题,提出了基于区间毕达哥拉斯犹豫模糊熵和交叉熵的ELECTRE II法。首先给出区间毕达哥拉斯犹豫模糊数的区间形式的得分函数和精度函数,定义新的距离测... 针对属性权重完全未知或部分已知,属性值为区间毕达哥拉斯犹豫模糊数的多属性决策问题,提出了基于区间毕达哥拉斯犹豫模糊熵和交叉熵的ELECTRE II法。首先给出区间毕达哥拉斯犹豫模糊数的区间形式的得分函数和精度函数,定义新的距离测度。然后基于区间毕达哥拉斯犹豫模糊数的模糊因子、直觉因子和幅度因子,给出熵和交叉熵公式,并证明其性质,提出了基于熵和交叉熵确定属性权重的方法。最后提出了区间毕达哥拉斯犹豫模糊环境下的改进的ELECTRE II法,利用综合优势值对方案进行排序,并通过算例和比较分析验证了该方法的可行性和有效性。 展开更多
关键词 多属性决策 区间毕达哥拉斯犹豫模糊集 交叉熵 ELECTRE ii
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融合NSGA-II和CSA的多目标车间调度
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作者 杨青 席珍珍 +2 位作者 葛亮 林星宇 邢志超 《计算机工程与应用》 CSCD 北大核心 2024年第4期315-323,共9页
针对在灵活车间系统中调度作业和自动引导车(automated guide vehicle,AGV)的同时调度问题,考虑在有限多个AGV和加工机台的情况下,以最小化最大完工时间、单个AGV搬运消耗时间及所有AGV搬运总消耗时间为目标函数,设计融合NSGA-II(non-do... 针对在灵活车间系统中调度作业和自动引导车(automated guide vehicle,AGV)的同时调度问题,考虑在有限多个AGV和加工机台的情况下,以最小化最大完工时间、单个AGV搬运消耗时间及所有AGV搬运总消耗时间为目标函数,设计融合NSGA-II(non-dominated sorting genetic algorithms)和克隆选择(clonal selection algorithm,CSA)的改进算法INGCSA来解决此类问题。采用工件、加工机台和AGV三部分编码;引入非支配排序和目标函数值大小排序后总得分进行种群分层,从而有效地保留优秀个体;针对克隆后的种群,对不同等级的种群采取不同的变异概率,并对染色体进行内部交换与均匀交叉混合交换的基因重组,有效地提高了种群的多样性与防止陷入局部最优。通过三组对比实验,验证了该算法在探索最优解时,具有运行时间短、稳定性高和收敛性好等优点。 展开更多
关键词 NSGA-ii 克隆选择算法 任务调度 运输调度 自动引导车(AGV)
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基于改进NSGA-II的轨道交通接驳公交线路优化
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作者 裴玉龙 姜封帅 +1 位作者 王婉佼 何庆龄 《重庆交通大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第6期54-63,共10页
为解决接驳公交线路规划不合理和时间安排不完善的问题,提出了基于改进NSGA-II算法的环形接驳公交线路优化方法。首先,结合双层规划理论,以乘客出行时间成本最小化、公交企业运营收益和接驳公交服务率最大化为目标函数,以接驳公交线路... 为解决接驳公交线路规划不合理和时间安排不完善的问题,提出了基于改进NSGA-II算法的环形接驳公交线路优化方法。首先,结合双层规划理论,以乘客出行时间成本最小化、公交企业运营收益和接驳公交服务率最大化为目标函数,以接驳公交线路站点数、线路长度和发车频率作为约束条件构建上层模型,采用Logit模型构建了下层接驳客流分配模型;其次,运用Floyd算法对NSGA-II算法的初始化种群进行了优化,针对所提出的模型设计了模型求解流程;最后,以哈尔滨市轨道交通1号线医大一院轨道交通站为案例,运用笔者提出的多目标双层规划模型和算法进行求解,并与原NSGA-II算法和基于Logistic混沌映射的NSGA-II算法进行对比。研究结果表明:基于Floyd算法改进的NSGA-II算法在多目标双层规划模型求解时,收敛速度更快效果更好,求解结果可以在Pareto前沿得到多个相互非支配的最优解;不同解集对应目标函数值不同,但可以达到接驳公交网络整体效益最优,采用折衷最优解集表述求解结果。 展开更多
关键词 交通工程 城市公交 多目标优化 双层规划 NSGA-ii
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营心宁胶囊辅助治疗对冠心病心力衰竭患者血管紧张肽II水平和心功能的影响
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作者 王静 李燕妮 《临床医学进展》 2024年第1期1135-1140,共6页
目的:观察营心宁胶囊辅助治疗对冠心病心力衰竭患者血管紧张肽II (AngII)水平和心功能的影响。方法:将128例患者分为两组,对照组64例,治疗组64例。对照组予常规治疗,治疗组患者在此基础上加用营心宁胶囊治疗,每次4粒,每日3次。治疗前及... 目的:观察营心宁胶囊辅助治疗对冠心病心力衰竭患者血管紧张肽II (AngII)水平和心功能的影响。方法:将128例患者分为两组,对照组64例,治疗组64例。对照组予常规治疗,治疗组患者在此基础上加用营心宁胶囊治疗,每次4粒,每日3次。治疗前及治疗8周后检测血浆AngII、脑钠肽(BNP),并行心脏彩色多普勒超声心动图测定左室射血分数(LVEF)、左室舒张末期内径(LVEDD)和每搏输出量(SV)。结果:治疗组和对照组总有效率分别为92.2%和89.1% (P > 0.01);显效率分别为43.8%,32.8% (P < 0.01)。两组治疗后患者的AngII、BNP、LVEF、LVEDD和SV均较治疗前明显改善(P < 0.01或P < 0.05),且治疗组患者的改善水平优于对照组(P < 0.01)。结论:营心宁胶囊能有效降低患者AngII水平,并对心功能有改善作用。 展开更多
关键词 营心宁 冠状动脉粥样硬化性心脏病心力衰竭 血管紧张肽ii 心功能
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血管紧张素II对脓毒症休克大鼠心脏功能的影响
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作者 安辉 姜檀 李晓伟 《中文科技期刊数据库(文摘版)医药卫生》 2024年第4期0182-0185,共4页
本研究拟通过盲肠结扎穿孔制备大鼠脓毒症模型,观察血管紧张素II对脓毒症休克(sepsis-shock)大鼠心脏功能的影响。方法 48只(Sprague-Dawley,SD)雄性大鼠随机分为6组(n=8):对照(control)组、假手术(sham)组、脓毒症休克(SS)组、去甲肾... 本研究拟通过盲肠结扎穿孔制备大鼠脓毒症模型,观察血管紧张素II对脓毒症休克(sepsis-shock)大鼠心脏功能的影响。方法 48只(Sprague-Dawley,SD)雄性大鼠随机分为6组(n=8):对照(control)组、假手术(sham)组、脓毒症休克(SS)组、去甲肾上腺素(NE)治疗组、血管紧张素II (ANGII)治疗组。采用盲肠结扎穿孔制备脓毒症休克动物模型。监测大鼠心率、血压变化。监测过程中大鼠如出现平均动脉压下降至65mmHg以下,立即给予0.9%生理盐水进行液体复苏,观察10分钟后如效果不佳,按照分组给予不同血管活性药物泵入。分别在造模后6,12,18,24小时抽血行心肌酶学指标检测,同时在该时段行超声观察大鼠心脏超声检查。于术后24小时留取心脏组织进行氧化因子指标测定,并进行心脏组织病理学观察。结果 与对照组和假手术组对比,脓毒症休克、去甲肾上腺素组、血管紧张素组平均动脉压下降明显,液体复苏效果欠佳,需要血管活性药物干预。与对照组和假手术组对比,脓毒症休克、去甲肾上腺素组、血管紧张素II组炎症反应、乳酸指标明显升高,具有统计学差异(P<0.05)。脓毒症休克组与对照组、假手术组相比,心脏左室射血分数(LVEF)明显下降,具有统计学差异(P<0.05),应用血管活性药物后,左室射血分数明显提高,血管紧张素II组射血分数提高与脓毒症组相比,具有显著统计学差异(P<0.01)。脓毒症休克组与对照组、假手术组相比,心肌酶学指标明显升高,应用去甲肾上腺素或血管紧张素II干预后,心肌酶学指标下降,与脓毒症组相比,具有统计学差异(P<0.05),血管紧张素II组改善更为明显(P<0.01)。结论 血管紧张素II可改善脓毒症休克对大鼠的心肌损害,对脓毒症休克大鼠心肌有一定的保护作用。 展开更多
关键词 脓毒症休克 去甲肾上腺素 血管紧张素ii 心脏功能
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表达Strep-tag II的重组塞内卡病毒的构建与鉴定
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作者 史家宝 蒙靓 +4 位作者 肖培宇 范峻豪 安同庆 王海伟 于力 《中国预防兽医学报》 CAS CSCD 北大核心 2024年第2期140-146,共7页
为构建表达Strep-tag II的重组塞内卡病毒(SVA),本研究在感染性cDNA克隆p SVA-I212V/S460L的基础上,采用重叠延伸PCR扩增Strep-tag II并采用无缝克隆法将其插入SVA VP1基因C端,构建感染性cDNA克隆,命名为p SVA-Strep,并采用双酶切和测... 为构建表达Strep-tag II的重组塞内卡病毒(SVA),本研究在感染性cDNA克隆p SVA-I212V/S460L的基础上,采用重叠延伸PCR扩增Strep-tag II并采用无缝克隆法将其插入SVA VP1基因C端,构建感染性cDNA克隆,命名为p SVA-Strep,并采用双酶切和测序鉴定正确后,将p SVA-Strep转染BHK-21细胞拯救重组病毒,收集病变细胞上清,并将含有病毒的细胞上清和野生型SVA(SVA-WT)分别感染BHK-21细胞,以未感染病毒的BHK-21细胞作为阴性对照,感染后24 h分别以鼠源SVA VP2蛋白单克隆抗体(MAb)5D10(1∶1000)、鼠源Strep-tag II MAb(1∶2000)作为一抗,以FITC标记的山羊抗小鼠Ig G(1∶2000)为二抗,采用间接免疫荧光试验(IFA)对重组病毒鉴定。IFA结果显示,以鼠源SVA VP2蛋白MAb 5D10为一抗,SVA-WT和重组病毒感染的细胞均出现绿色荧光,以Strep-tag II MAb作为一抗时,仅有重组病毒感染的细胞出现绿色荧光,经SVA-WT感染的BHK-21细胞及阴性对照细胞均无绿色荧光,表明拯救了Strep-tag II标记的重组病毒,并将其命名为r SVA-Strep。将r SVA-Strep在BHK-21细胞中连续传10代,每隔2代采用引物VP1-F/R经PCR鉴定并对第10代重组病毒的VP1基因测序以鉴定r SVA-Strep的遗传稳定性。结果显示,每隔两代的重组病毒经PCR扩增后均出现约780 bp的目的条带,第10代重组病毒扩增的VP1基因测序结果显示Strep-tag II基因仍在重组病毒中,且无基因突变,表明r SVA-Strep的遗传稳定性较强;将SVA-WT和r SVA-Strep分别以MOI 0.01感染BHK-21细胞,在感染后4 h、8 h、12 h、24 h、36 h、48 h和72 h收获病毒测定病毒滴度并绘制生长曲线,结果显示在病毒感染36 h内r SVA-Strep和SVA-WT生长动力学基本一致,表明Strep-tag II的引入在病毒感染36 h内对SVA的复制基本无影响。采用0.2%甲醛充分灭活r SVA-Strep,并利用Strep-TactinRXT Purification纯化试剂盒纯化该灭活病毒,将r SVA-Strep灭活病毒上清加至Strep-Tactin亲和层析柱,分别用不同体积洗脱缓冲液依次洗脱病毒并通过western blot鉴定病毒的纯化效果。对纯化过程中不同洗脱液洗脱病毒的western blot结果显示,不同体积的洗脱液中E1、E2和E3均出现VP0和VP2两条带,且E1和E2的条带最明显,表明洗脱缓冲液的最佳洗脱体积约为2.2 CV;以上结果表明r SVA-Strep可通过Strep-Tactin亲和层析柱一步法纯化。本研究在SVA中插入Strep-tag II标签,为SVA灭活疫苗的快速纯化提供技术手段,也为其他病原的快速纯化方法的建立提供参考。 展开更多
关键词 塞内卡病毒 Strep-tag ii 感染性克隆 抗原纯化
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基于NSGA-II遗传算法的定轴注射模具成型工艺参数优化
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作者 陈超 高全杰 《农业装备与车辆工程》 2024年第8期153-157,共5页
为解决注射成型过程中铸件的质量和铸造效率低等问题,提出一种NSGA-II算法和TOPSIS方法与响应面法相结合的新型注射工艺参数优化筛选方法。以定轴为研究对象,采用Box-Behnken设计,以熔体温度、模具温度、注射时间、保压压力为变量,以翘... 为解决注射成型过程中铸件的质量和铸造效率低等问题,提出一种NSGA-II算法和TOPSIS方法与响应面法相结合的新型注射工艺参数优化筛选方法。以定轴为研究对象,采用Box-Behnken设计,以熔体温度、模具温度、注射时间、保压压力为变量,以翘曲变形量和体积收缩率为响应变量,采用NSGA-II遗传算法对2个响应的目标函数执行优化,用TOPSIS方法求解优化得到的Pareto前沿解集,找到最优解。仿真结果表明,当注射时间为40.71s、模具温度为131℃、熔体温度为180.07℃、保压压力为65 MPa时,翘曲变形降低了10.92%、体积收缩率降低了11.19%。优化后的注射工艺参数可有效消除铸件内部收缩松动和缩孔缺陷,形成性能良好的致密铸件,提高了产品质量。 展开更多
关键词 注射成型 多目标优化 BOX-BEHNKEN设计 NSGA-ii遗传算法
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Copper Metabolism and Cuproptosis:Molecular Mechanisms and Therapeutic Perspectives in Neurodegenerative Diseases 被引量:2
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作者 Xiao-xia BAN Hao WAN +7 位作者 Xin-xing WAN Ya-ting TAN Xi-min HU Hong-xia BAN Xin-yu CHEN Kun HUANG Qi ZHANG Kun XIONG 《Current Medical Science》 SCIE CAS 2024年第1期28-50,共23页
Copper is an essential trace element,and plays a vital role in numerous physiological processes within the human body.During normal metabolism,the human body maintains copper homeostasis.Copper deficiency or excess ca... Copper is an essential trace element,and plays a vital role in numerous physiological processes within the human body.During normal metabolism,the human body maintains copper homeostasis.Copper deficiency or excess can adversely affect cellular function.Therefore,copper homeostasis is stringently regulated.Recent studies suggest that copper can trigger a specific form of cell death,namely,cuproptosis,which is triggered by excessive levels of intracellular copper.Cuproptosis induces the aggregation of mitochondrial lipoylated proteins,and the loss of iron-sulfur cluster proteins.In neurodegenerative diseases,the pathogenesis and progression of neurological disorders are linked to copper homeostasis.This review summarizes the advances in copper homeostasis and cuproptosis in the nervous system and neurodegenerative diseases.This offers research perspectives that provide new insights into the targeted treatment of neurodegenerative diseases based on cuproptosis. 展开更多
关键词 cuproptosis copper metabolism copper homeostasis NEURODEGENERATION neurodegenerativedisease
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Fe(II)改性蒙脱石对土壤汞的吸附固定机理探究
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作者 周细霞 刘朝淑 孙荣国 《贵州师范大学学报(自然科学版)》 CAS 北大核心 2024年第4期63-74,共12页
为明确Fe-MMT对土壤汞离子(Hg^(2+))的吸附、解吸特性及潜在作用机理,采用FeSO_(4)·7H_(2)O改性钠基蒙脱土(Na-MMT),合成了Fe(II)基蒙脱石(Fe-MMT),并探究了不同pH值、吸附剂用量、Hg^(2+)初始浓度和反应时间等条件下,Fe-MMT对土壤... 为明确Fe-MMT对土壤汞离子(Hg^(2+))的吸附、解吸特性及潜在作用机理,采用FeSO_(4)·7H_(2)O改性钠基蒙脱土(Na-MMT),合成了Fe(II)基蒙脱石(Fe-MMT),并探究了不同pH值、吸附剂用量、Hg^(2+)初始浓度和反应时间等条件下,Fe-MMT对土壤Hg^(2+)的吸附解吸特性、吸附动力学和等温吸附模型。结果发现:在pH=5、吸附剂用量为0.5 g、Hg^(2+)初始浓度为170 mg/L、反应时间为0.5 h的条件下,Fe-MMT对土壤Hg^(2+)的去除率高达76.8%;Fe-MMT对Hg^(2+)+的吸附过程符合Langmuir等温吸附模型,伪二阶动力学模型可较好地拟合吸附动力学行为,表明该吸附过程主要为单分子层吸附,且主要发生在吸附剂表面的均相反应位点上;结合微观结构表征,发现Fe-MMT对土壤Hg^(2+)的吸附主要通过-S^(2-)、-SH和-OH与Hg^(2+)进行络合,以及Fe^(2+)与Hg^(2+)的原位共沉淀络合引起的;Fe-MMT在水-土混合体系中的解吸率为9.7%,表明Fe-MMT对土壤Hg^(2+)具有较强的固定作用。可见,Fe-MMT具有修复Hg污染土壤的潜力。 展开更多
关键词 吸附 水土混合 解吸 Fe(ii)改性蒙脱石(Fe-MMT)
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Coordination and Photoisomerization of Azobenzene-Amino Acid Schiff Base Copper(II) Complexes to Lysozyme
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作者 Yuto Kuroda Ryotaro Miyazaki +2 位作者 Daiki Shimonishi Daisuke Nakane Takashiro Akitsu 《Journal of Materials Science and Chemical Engineering》 CAS 2023年第3期34-44,共11页
In this study, we exhibited an amino acid (arginine and threonine) derivative Schiff base copper(II) complexes incorporating an azobenzene moiety as a photoresponsive site and conjugated it to egg white lysozyme, a we... In this study, we exhibited an amino acid (arginine and threonine) derivative Schiff base copper(II) complexes incorporating an azobenzene moiety as a photoresponsive site and conjugated it to egg white lysozyme, a well-known protein, to change ligand conformation under binding to lysozyme. Among several spectroscopic investigations, ESR clearly showed that the nitrogen atom of the amino acid residue of lysozyme was bound to the paramagnetic copper(II) ion of the complex, and UV light irradiation confirmed photoisomerization of the azobenzene moiety of the ligand to cis-form. The binding mode was considered by means of spectroscopic as well as computational methods, whereas complete crystallographic verification was still a preliminary stage. 展开更多
关键词 AZOBENZENE Schiff Base copper Amino Acid LYSOZYME Artificial Metalloprotein
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成人低角型安氏II类1分类与安氏II类2分类错合畸形矫治前唇颏形态差异性研究
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作者 吴金枝 姜荻 +1 位作者 蒋均红 刘新庆 《中文科技期刊数据库(文摘版)医药卫生》 2024年第10期0116-0119,共4页
通过对比成人低角型安氏II类1分类和安氏II类2分类错合畸形患者的面部形态特点及唇颏形态,为临床制定矫治方案和临床治疗工作提供思路。方法 分别选取低角型安氏I类1分类和安氏II类2分类错合畸形患者40例,男女比例为1:1,年龄:18-25岁.... 通过对比成人低角型安氏II类1分类和安氏II类2分类错合畸形患者的面部形态特点及唇颏形态,为临床制定矫治方案和临床治疗工作提供思路。方法 分别选取低角型安氏I类1分类和安氏II类2分类错合畸形患者40例,男女比例为1:1,年龄:18-25岁.通过将侧貌X线片和面部90°面相重合,对测量面部软组织21项指标进行测量。结果 上唇突点—E线距离,下唇突点—E线距离,上唇倾角,下唇倾角,上唇厚度,上下唇面积对比均有统计学意义(P<0.05)。结论 低角型安氏II类1分类与安氏II类2分类相比,上下唇均呈前突状,上唇面积,安氏II类1分类较安氏II类2分类小,下唇面积,安氏II类1分类较安氏II类2分类大。 展开更多
关键词 低角型 安氏ii类1分类 安氏ii类2分类 唇颏形态
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青霜露暴露治疗II度烧烫伤临床观察
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作者 陈建彬 丁祖章 +3 位作者 陈骏 宋红梅 刘莹莹 胡娟 《外科(汉斯)》 2024年第3期55-61,共7页
目的:观察青霜露暴露治疗烧烫伤的临床效果。方法:门诊II度烧烫伤患者100例,其中浅II度67例,深II度33例。以暴露疗法在烧烫伤创面青霜露局部用药,每日1~3次,直至愈合。结果:67例浅II度烧烫伤创面经青霜露治疗全部愈合,愈合时间最短6天,... 目的:观察青霜露暴露治疗烧烫伤的临床效果。方法:门诊II度烧烫伤患者100例,其中浅II度67例,深II度33例。以暴露疗法在烧烫伤创面青霜露局部用药,每日1~3次,直至愈合。结果:67例浅II度烧烫伤创面经青霜露治疗全部愈合,愈合时间最短6天,最长30天;33例深II度烧烫伤创面经青霜露治疗30天痊愈31例,显效2例,愈合时间最短14天。所有创面愈合良好,局部疼痛消失和无明显增生性瘢痕。结论:青霜露治疗烧烫伤促进创面愈合,疗效确切;本方法简单方便,值得临床推广应用。 展开更多
关键词 青霜露 暴露疗法 ii度烧烫伤 临床观察
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Hybrid treatment of varied orthodontic appliances for a patient with skeletal class II and temporomandibular joint disorders:A case report and review of literature 被引量:1
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作者 Tong Lu Li Mei +2 位作者 Bao-Chao Li Zi-Wei Huang Huang Li 《World Journal of Clinical Cases》 SCIE 2024年第2期431-442,共12页
BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during or... BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during orthodontic treatment,an immediate pause of orthodontic adjustments is recommended;the treatment can resume when the symptoms are managed and stabilized.CASE SUMMARY This case report presents a patient(26-year-old,female)with angle class I,skeletal class II and TMDs.The treatment was a hybrid of clear aligners,fixed appliances and temporary anchorage devices(TADs).After 3 mo resting and treatment on her TMD,the patient’s TMD symptom alleviated,but her anterior occlusion displayed deep overbite.Therefore,the fixed appliances with TAD were used to correct the anterior deep-bite and level maxillary and mandibular deep curves.After the levelling,the patient showed dual bite with centric relation and maximum intercuspation discrepancy on her occlusion.After careful examination of temporomandibular joints(TMJ)position,the stable bite splint and Invisible Mandibular Advancement appliance were used to reconstruct her occlusion.Eventually,the improved facial appearance and relatively stable occlusion were achieved.The 1-year follow-up records showed there was no obvious change in TMJ morphology,and her occlusion was stable.CONCLUSION TMD screening and monitoring is of great clinical importance in the TMD susceptible patients.Hybrid treatment with clear aligners and fixed appliances and TADs is an effective treatment modality for the complex cases. 展开更多
关键词 Temporomandibular disorder Skeletal class ii Deep overbite Dual bite Invisible mandibular advancement appliance Case report
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血管活性药物评分联合APACHE II评分对血流感染后脓毒性休克患者预后的预测价值
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作者 王佳权 姚莉 赵晶晶 《临床医学进展》 2024年第2期3114-3121,共8页
目的:探讨血管活性药物评分(vasoactive inotropic score, VIS)联合急性生理与慢性健康评分(APACHE II)对血流感染后脓毒性休克患者结局的预测价值,为临床提供参考。方法:采用回顾性研究方法,通过收集2020年1月至2022年12月安徽医科大... 目的:探讨血管活性药物评分(vasoactive inotropic score, VIS)联合急性生理与慢性健康评分(APACHE II)对血流感染后脓毒性休克患者结局的预测价值,为临床提供参考。方法:采用回顾性研究方法,通过收集2020年1月至2022年12月安徽医科大学附属合肥医院重症医学科收治的185例脓毒性休克患者的临床资料,根据28 d转归情况,分为存活组95例和死亡组90例,记录所有患者性别、年龄、相关血液检测指标、SOFA评分、24小时内急性生理与慢性健康评分(APACHE II)及24小时内最大血管活性药物评分(VISmax24)等信息,采用单因素分析筛选脓毒性休克患者的相关危险因素,多因素logistic回归分析影响脓毒性休克患者预后的独立危险因素,采用受试者工作特征(receiver op-erating characteristic, ROC)曲线下面积(area under curve, AUC)分析各指标的诊断价值。结果:单因素分析结果表明:死亡组的APACHE II评分(24.30 ± 5.157)、VISmax24 [100.0 (53.5, 121.0)]明显高于存活组(P max24联合APACHE II评分(AUC = 0.848, 95% CI: 0.792~0.905),较单一的APACHE II评分(AUC = 0.729, 95% CI: 0.655~0.802)、VISmax24 (AUC = 0.783, 95% CI: 0.709~0.856)、乳酸(AUC = 0.665, 95% CI: 0.587~0.743)、SOFA (AUC = 0.680, 95% CI: 0.602~0.758)预测价值更高。结论:VISmax24联合APACHE II评分能更有效预测血流感染后脓毒性休克患者的预后。 展开更多
关键词 血管活性药物评分 脓毒性休克 APACHE ii评分 病死率 预测价值
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