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Phase separation in solvent extraction of cobalt from acidic sulfate solution using synergistic mixture containing dinonylnaphthalene sulfonic acid and 2-ethylhexyl 4-pyridinecarboxylate ester

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 1107-1116页

作者： Ting huANG Yong-xi WANG hui-ping hu Fang hu Yu-qing LUO Shi-jun LIU College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Phase separation rate is a critical character in determining the usefulness of a solvent extraction system in hydrometallurgy. A survey of the synergistic mixture containing dinonylnaphthalene sulfonic acid (HDNNS) and 2-ethylhexly 4-pyridinecarboxylate ester (4PC) for the extraction of cobalt from acidic single metal sulfate solution was carried out to suggest how the physicochemical properties and the morphology of the reverse micelles in the loaded organic phase affect the phase separation. The results show that effective parameters affecting the phase separation are the viscosity and the excess water uptake of the loaded organic phase. It is obvious that the specific settling rate (SSR) decreases with the apparent increase of these two parameters. The measurement of small angle X-ray scattering (SAXS) proves that the morphology of the reversed micelles in the loaded organic phase changes evidently with the change of the specific settling rate (SSR).

关键词： synergistic solvent extraction phase separation specific settling rate reverse micelle cobalt

盐酸环喷托酯和阿托品对远视儿童睫状肌麻痹效果的比较

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国际眼科杂志 2011年第11期11卷 2047-2048页

作者：胡平会苏州大学附属理想眼科医院中国江苏省苏州市215000

目的:比较盐酸环喷托酯与阿托品对远视儿童睫状肌麻痹效果,以评估盐酸环喷托酯的临床使用价值。方法:对96例192眼远视儿童进行观察,先用盐酸环喷托酯滴眼液,后用阿托品眼膏,分析比较两种药物睫状肌麻痹后的验光结果和观察药物的不良反... 详细信息

目的:比较盐酸环喷托酯与阿托品对远视儿童睫状肌麻痹效果,以评估盐酸环喷托酯的临床使用价值。方法:对96例192眼远视儿童进行观察,先用盐酸环喷托酯滴眼液,后用阿托品眼膏,分析比较两种药物睫状肌麻痹后的验光结果和观察药物的不良反应。结果:两组睫状肌麻痹后的验光结果差异无显著性(P>0.05)。盐酸环喷托酯组未见明显药物不良反应,低于阿托品组(12.5%)。结论:盐酸环喷托酯是一种强效、快速且安全的睫状肌麻痹剂,值得临床推广应用,尤其适合远视儿童的睫状肌麻痹验光检查。

关键词：盐酸环喷托酯阿托品睫状肌麻痹远视儿童

Synthesis of novel silica-supported chelating resin containing tert-butyl 2-picolyamino-N-acetate and its properties for selective adsorption of copper from simulated nickel electrolyte

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Transactions of Nonferrous Metals Society of China 2018年第12期28卷 2553-2565页

作者： Cai-xia WANG hui-ping hu Xue-jing QIU Ze-ying CHENG Lu-jia MENG Li Zhu School of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources Central South UniversityChangsha 410083China

A novel silica-supported tert-butyl 2-picolyamino-N-acetate chelating resin (Si-AMPY-1) was successfully synthesized and characterized by elemental analysis, FT-IR, SEM and 13 C CP/MAS NMR. The adsorption behaviors of the Si-AMPY-1 resin for Cu(Ⅱ) and Ni(Ⅱ) were studied with batch and column methods. The batch experiments indicated that the Si-AMPY-1 resin adsorbed Ni(Ⅱ) mainly via physisorption, while adsorbed Cu(II) via chemisorption. The column dynamic breakthrough curves revealed thatthe Si-AMPY-1 resin can efficiently separate Cu(Ⅱ) from the simulated nickel electrolyte before the breakthrough point. Moreover, the concentration of Cu(Ⅱ) in the column effluent was decreased to be less than 3 mg/L within the first 43 BV (bed volumes), and the mass ratio of Cu/Ni was 21:1 in the saturated resin, which completely satisfied the industrial requirements of the nickel electrorefining process. Therefore, it was concluded that the Si-AMPY-1 resin can be a promising candidate for the deep removal of Cu(Ⅱ) from the nickel electrolyte.

关键词： chelating resin selective adsorption copper removal simulated nickel electrolyte synthesis

Negative effects of dissolved organic compounds on settling performance of goethite in Bayer red mud

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Transactions of Nonferrous Metals Society of China 2017年第2期27卷 429-439页

作者：王梦胡慧萍刘锦伟中南大学化学化工学院长沙410083

Goethite, a typical iron-containing monomineral in red mud, was synthesized under the simulated Bayer digestion condition during the alumina production. The effects of dissolved organic compounds including sodium formate, sodium acetate, sodium oxalate, sodium salicylate and disodium phthalate on the settling performance of goethite slurries were studied. The settling performance of the slurries was also investigated with the addition of self-made hydroxamated polyacrylamide flocculant （HCPAM）. The adsorption mechanism of dissolved organic compounds on the goethite surfaces was studied by FT-IR and XPS, respectively. The results show that the addition of organic compounds lowers the settling performance of the slurries and a deterioration in settling performance is observed in the order of sodium oxalate 〉 sodium salicylate （~ disodium phthalate）〉 sodium formate 〉 sodium acetate. Moreover, HCPAM can efficiently eliminate the negative effects of sodium formate, sodium acetate and sodium oxalate on the settling performance of the goethite slurries, but it can only partially improve the settling performance of the goethite slurries containing sodium salicylate or disodium phthalate. FT-IR and XPS results show that these organic compounds are chemically adsorbed on the goethite surface.

关键词： goethite dissolved organic compound settling performance adsorption mechanism

不同程度的屈光矫正对青少年儿童近视进展的影响

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国际眼科杂志 2012年第11期12卷 2233-2234页

作者：胡平会郭晓枚苏州大学附属理想眼科医院中国江苏省苏州市215000

目的:探讨近视儿童配戴不同程度的屈光矫正眼镜及不戴镜对近视进展的影响。方法:对90例180眼近视儿童分为3组:不戴镜组30例,低矫组(单眼矫正<1.0)30例及全矫组(单眼矫正至1.0)30例,所有患儿均用复方托品酰胺进行睫状肌麻痹验光,次日复... 详细信息

目的:探讨近视儿童配戴不同程度的屈光矫正眼镜及不戴镜对近视进展的影响。方法:对90例180眼近视儿童分为3组:不戴镜组30例,低矫组(单眼矫正<1.0)30例及全矫组(单眼矫正至1.0)30例,所有患儿均用复方托品酰胺进行睫状肌麻痹验光,次日复验配镜。1a后,复方托品酰胺进行睫状肌麻痹验光,屈光度以单眼矫正至1.0为标准。观察屈光度的改变。结果:各组患者近视屈光度均逐年增加,增加度数全矫组明显低于不戴镜组及低矫组,低矫组明显低于不戴镜组。结论:不同程度的屈光矫正及未矫正对近视患者屈光演变过程有影响,欠矫及未矫正均可加速近视的进展。

关键词：近视屈光矫正

Unraveling brain aging through the lens of oral microbiota

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Neural Regeneration Research 2025年第7期20卷 1930-1943页

作者： Qinchao hu Si Wang Weiqi Zhang Jing Qu Guang-hui Liu State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Advanced Innovation Center for human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijingChina CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina University of Chinese Academy of Sciences BeijingChina Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijingChina Aging Biomarker Consortium BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina

The oral cavity is a complex physiological community encompassing a wide range of *** of oral microbiota can lead to various oral infectious diseases,such as periodontitis and tooth decay,and even affect systemic health,including brain aging and neurodegenerative *** studies have highlighted how oral microbes might be involved in brain aging and neurodegeneration,indicating potential avenues for intervention *** this review,we summarize clinical evidence demonstrating a link between oral microbes/oral infectious diseases and brain aging/neurodegenerative diseases,and dissect potential mechanisms by which oral microbes contribute to brain aging and *** also highlight advances in therapeutic development grounded in the realm of oral microbes,with the goal of advancing brain health and promoting healthy aging.

关键词： Alzheimer's disease brain aging multiple sclerosis neurodegeneration neurodegenerative diseases oral microbiota Parkinson's disease periodontitis bacteria Porphyromonas gingivalis

Solubility of hemimorphite in ammonium sulfate solution at 25 °C

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Transactions of Nonferrous Metals Society of China 2013年第7期23卷 2160-2165页

作者：李琴香胡慧萍曾德文陈启元中南大学化学化工学院长沙410083

The solubility of natural hemimorphite in ammonium sulfate solution was measured by isothermal solution method at 25 °C and the dissolved residue of hemimorphite was investigated by X-ray powder diffraction （XRD）, scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FTIR） methods. The results show that zinc and silica in hemimorphite simultaneously dissolve in ammonium sulfate solution. The solubility of zinc in solution increases rapidly from 4.5381 mmol/kg in 0.5469 mol/kg ammonium sulfate solution to 11.5083 mmol/kg in 3.7038 mol/kg ammonium sulfate solution. The solubility of silica in solution increases slowly from 2.5509 mmol/kg in 0.5469 mol/kg ammonium sulfate solution to 7.2891 mmol/kg in 3.7038 mol/kg ammonium sulfate solution. The dissolved residue is the characteristic of hemimorphite Zn4Si2O7（OH）2·H2O based on the results of the XRD, SEM and FTIR. Thus, no phase transition occurs in the dissolution process of hemimorphite in ammonium sulfate solution.

关键词： hemimorphite ammonium sulfate silicic acid solubility

Effect of Nb-V microalloying on the hot deformation behavior of medium Mn steels

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 360-368页

作者： Yumeng Wang Qinyi Guo Bin hu Haiwen Luo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The influence of Nb-V microalloying on the hot deformation behavior and microstructures of medium Mn steel(MMS)was investigated by uniaxial hot compression *** establishing the constitutive equations for simulating the measured flow curves,we successfully constructed deformation activation energy(Q)maps and processing maps for identifying the region of flow *** concluded the following consequences of Nb-V alloying for MMS.(i)The critical strain increases and the increment diminishes with the increasing deformation temperature,suggesting that NbC precipitates more efficiently retard dynamic recrystallization(DRX)in MMS compared with solute Nb.(ii)The deformation activation energy of MMS is significantly increased and even higher than that of some reported high Mn steels,suggesting that its ability to retard DRX is greater than that of the high Mn content.(iii)The hot workability of MMS is improved by narrowing the hot processing window for the unstable flow stress,in which fine recrystallized and coarse unrecrystallized grains are present.

关键词： medium manganese steel niobium-vanadium microalloying flow behavior dynamic recrystallization hot workability

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基于状态空间理论的砼重力坝振动响应分析

中国农村水利水电 2016年第11期 156-159页

作者：谢荣晖吴学平胡德华罗德河河海大学水利水电学院南京210098 河海大学水资源高效利用与工程安全国家工程研究中心南京210098 中国水利水电第八工程局有限公司长沙410004

介绍了一种基于状态空间理论的多自由度结构系统动力响应分析算法,将结构动力学的平衡方程经过一定的变换得到状态空间方程,再将该方程嵌入卡尔曼滤波算法,最终得到多自由度系统的状态随着系统输入的实时更新。将该算法运用于混凝土重... 详细信息

介绍了一种基于状态空间理论的多自由度结构系统动力响应分析算法,将结构动力学的平衡方程经过一定的变换得到状态空间方程,再将该方程嵌入卡尔曼滤波算法,最终得到多自由度系统的状态随着系统输入的实时更新。将该算法运用于混凝土重力坝算例,分别进行不同观测噪声水平的动力响应计算,并且将得到的动力响应信息与ABAQUS有限元软件数值模拟的结果进行比较,均具有较高的相似度,说明该算法的有效性,并且抗噪能力强,具有一定的工程应用价值。

关键词：状态空间理论重力坝动力响应振动