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Extraction of Tungsten and Molybdenum by Various Organic Compounds as Extractants

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Rare Metals 1989年第3期9卷 15-19页

作者： yuan, qun Cheng, Xin Luo, Jiazhen yuan, Chengye Shanghai Inst of Organic Chemistry China

Seventy organic compounds including various organophosphorus esters, amines and oxygen-based ligands were investigated as extractants. The experiment results show that amines are excellent extractants for W and Mo. Their sequence of extraction ability for W is as follows: quarternary amine > tertiary amine > secondary amine > primary amine. Acidic organophosphorus extractants do not extract W, but can extract Mo with high extraction ability from the acidic solution. These extractants could provide a potential process for separating W from Mo.

关键词： Alcohols Applications Amines Applications Molybdenum Ore Treatment Solvent Extraction Phosphorus Compounds Organic Solvents Organic

ESTIMATION OF DIRECTIONAL SPECTRUM AND REFLECTED COEFFICIENT OF INCIDENT AND REFLECTED WAVE IN PHASE-LOCKED WAVE FIELD

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Journal of Hydrodynamics 2005年第6期17卷 713-723页

作者： SHAO Li-min YU Zhi-liang yuan qun-zhe YU Yu-xiu Department of Ocean and Mapping Science Dalian Naval Academy Dalian 116018 China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116023 China

This paper analyses and compares the property of the Modified Bayesian Directional spectrum analysis Method （MBDM） and the Modified Maximum Lkelihood Method （MMLM） that can he used to estimate directional spectrum and reflected coefficient of phase-locked wave field overlapped by multi directional irregular incident and reflected waves. The numerical test verifies the results under different wave conditions, different measurement systems, and different reflection features. The computation speed and stability of the two methods is also compared. The analysis addresses that the MBDM is better than the MMLM for directional spectrum estimating, while the MMLM is better than the MBDM for reflected coefficient estimation and calculating speed and stability.

关键词： directional spectrum reflected coefficient,Modified Maximum Likelihood Method (MMLM) Modified Bayesian Directional spectrum analysis Method (MBDM)

Synthesis of high-performance single-crystal Li-rich cathode by self-combustion method

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Rare Metals 2023年第3期42卷 830-837页

作者： Lun-Te Li Ya-Fen Chen Yan-Chen Liu Qi Zhang Jun-Wei Wu qun-Hui yuan School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China

Li-rich manganese-based oxide has been identified as the most promising cathode material for next-generation Li-ion batteries,due to its high capacity,high operating voltage,safety,and low ***,its wide application is restricted by low initial Columbic efficiency,undesirable cycle stability,and poor rate *** tackle these issues,single-crystal Li_(1.2)Mn_(0.54)Co_(0.13)Ni_(0.13)O_(2) is synthesized by a self-combustion *** with the poly-crystal Li-rich cathode,the specific discharge capacity of the single-crystal sample increased from 252.0 to304.6 mAh·g^(-1) at 0.1 C.

关键词： crystal high manganese

A ladder conjugated polymer transducer for solid-contact Cu^(2+)-selective electrodes

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Chinese Chemical Letters 2014年第2期25卷 364-366页

作者： Shun-Yang Yu Yan-Cang Li Tao Xiong qun yuan Yong-Ming Liu Zhong-Yi yuan Yi Xiao Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Provincial Key Laboratory of Coastal Environmental ProcessesYICCAS Chemistry and Chemical Engineering College.Yantai University Physical Science and Technical College Dalian University State Key Laboratory of Fine Chemicals Dalian University of Technology

In recent years, there has been a pronounced interest in solid-contact ion-selective electrodes （SC-ISEs）, with emphasis on the use of conducting polymers as ion-to-electron transducer. In this work, a ladder conjugated polymer, thieno[3,2-b]thiophene （LCPT）, was investigated in fabricating Cu2＋-selective electrodes for the first time. The resulting electrodes were characterized by electrochemical impedance spectroscopy （EIS）, chronopotentiometry, and the water layer test. Results proved that the active LCPT facilitates the ion-to-electron transduction, and avoids the detrimental aqueous layer formed at the interface of SC-ISEs.

关键词： Ladder polymer Solid contact Ion-selective electrode Copper

Lacrimal sac lymphoma: a case series and literature review

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International Journal of Ophthalmology(English edition) 2022年第10期15卷 1586-1590页

作者： Feng-Xi Meng Han Yue Yi-qun yuan Rui Zhang Yi-Fei yuan Ying-Wen Bi Jiang Qian Department of Ophthalmology Eye&ENT Hospital of Fudan UniversityyShanghai 200031China Laboratory of Myopia Chinese Academy of Medical SciencesyShanghai 200031China NHC Key Laboratory of Myopia Fudan UniversityyShanghai 200031China Department of Pathology Eye&ENT Hospital of Fudan UniversityShanghai 200031China

AIM: To study the clinical and pathological characteristics of the lacrimal sac lymphoma, which is rare but it is the major type of non-epithelial malignant tumor in the lacrimal sac region. METHODS: Sixty-four cases of malignant lacrimal sac tumors in our hospital from 1986 to 2020 were retrospectively reviewed. Eight cases of lacrimal sac lymphoma were carefully reviewed. RESULTS: There were five mucosal-associated lymphoid tissue(MALT) lymphomas, one diffused large B-cell lymphoma, one NK/T cell lymphoma, and one mantle cell lymphoma. All eight patients represented symptoms of epiphora with swelling in the lacrimal sac for a certain period of time and showed no signs of systemic involvement at the first time of clinical visits. They had received either chemotherapy or radiotherapy after surgery. Long-term follow-up(from 11 to 220 mo) showed that, except one patient with MALT lymphoma died for unknown reasons at 104 mo after surgery, the other 7 patients were all alive with no signs of local recurrence, neither in other organs. CONCLUSION: Non-epithelial malignant tumors of the lacrimal sac are rare and lymphoma is the major subtype.

关键词： lacrimal sac tumor lacrimal drainage apparatus non-epithelial lacrimal sac tumor lymphoma mucosal-associated lymphoid tissue lymphoma

维普期刊数据库评论

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基于人工神经网络模型的船舶油污损失估算

系统仿真学报 2006年第2期18卷 475-477,481页

作者：袁群上海海事大学交通运输学院上海200135

将人工神经网络理论引入了船舶油污损失赔偿额的估算中,通过从历史船舶溢油事故案例库中选取了十组样本数,以污染损失赔偿额与影响因子集作为训练样本,建立了船舶溢油事故污染损失额估算的人工神经网络模型。并对人工神经网络模型进行... 详细信息

将人工神经网络理论引入了船舶油污损失赔偿额的估算中,通过从历史船舶溢油事故案例库中选取了十组样本数,以污染损失赔偿额与影响因子集作为训练样本,建立了船舶溢油事故污染损失额估算的人工神经网络模型。并对人工神经网络模型进行仿真训练学习,并将训练好的神经网络应用于对相关案例的估算。研究结果表明应用人工神经网络方法进行溢油损失估算结果客观、可靠,为船舶油污索赔和环境保护提供了有力的理论依据。

关键词：船舶油污损失人工神经网络仿真训练应用估算

Dopamine inhibits proliferation,induces differentiation and apoptosis of K562 leukaemia cells

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Chinese Medical Journal 2007年第11期120卷 970-974页

作者： HE qun yuan Lin-bo Research Laboratory of Blood Physiology Department of Physiology Xiangya School of Medicine Central South University Changsha 410078 China

Background Dopamine exerts its effects mainly in nervous system through D1, D2 or D3 receptors. There are few reports dealing with the effects of dopamine on leukaemia cells. However, some dopamine agonists or antagonists do show biological effects on some types of leukaemia cells. Here, we report the effects of dopamine on the proliferation, differentiation and apoptosis of K562 leukaemia cells. Methods Proliferation was determined by MTT assay and cell counting both in liquid and semisolid cultures. Differentiation was verified by morphology, benzidine staining and flow cytometry. Apoptosis was checked by Hoechst 33258 staining and flow cytometry. The two groups were untreated group and treated group （dopamine 109 mol/L-104 mol/L）. Results In liquid culture, MTT assay and colony assay, dopamine inhibited proliferation of K562 cells. Inhibition rate was 29.28% at 106 mol/L and 36.10% at 10.5 mol/L after culture for 5 days in MTT assay. In benzidine staining and CD71 expression, dopamine induced K562 cells toward erythroid differentiation by increased 155% at 10^-6 mol/L and by 171% at 10^-5 mol/L after culture for 5 days in benzidine staining. In Hoechst 33258 staining and flow cytometry, dopamine induced K562 cells toward apoptosis. The sub G1 peak stained by PI was 14.23% at 104 mol/L dopamine after culture for 3 days compared with the control （0.81%） in flow cytometry. Conclusion Dopamine inhibites proliferation and induces both differentiation and apoptosis of K562 leukaemia cells.

关键词： dopamine proliferation differentiation apoptosis

The Molecular Recognition Characteristics of ω-MercaptoMethoxy Poly(Ethylene Glycol) Self-assembled Monolayer at Gold Electrode and the Detection of Dopamine in Serum

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Chinese Chemical Letters 1998年第2期9卷 165-168页

作者： Shi Feng HOU Ke Shen YANG Hui qun FANG and Hong yuan CHEN(Department of Chemistry, Naning University, Nanjing 210093) Department of Chemistry Nanjing University Nanjing 210093 China

Self assembled monolayers (SAMs) of to-mercapto methoxy poly(ethylene glycol)(MPEG) on gold electrode were used as a means to detect dopamine. Dopamine (DA) had good response at the MPEG film electrode and ascorbic acid (AA) was repelled from the SAMs. TheMPEG film is a biocompatible film, there was no adsorption of biosample and no inactivation atelectrode surface when it was used to detect DA in biosamples.

关键词： Self-assembled Monolayers Electrode Detection Dopamine

Order-Disorder Transition of Carboxyl Terminated Chains in Polydiacetylenes Vesicles Probed by Second Harmonic Generation and Two-Photon Fluorescence

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Chinese Journal of Chemical Physics 2018年第3期31卷 269-276,367页

作者： Shun-li Chen Xue-feng Zhu Fang-yuan Yang Xue-cong Pan Wei Gan qun-hui yuan Laboratory of Environmental Science and Technology Xinjiang Technical Institute of Physics and ChemistryKey Laboratory of Functional Materials and Devices for Special EnvironmentsChinese Academy of SciencesUrumqi 830011China School of Sciences Harbin Institute of Technology(Shenzhen)Shenzhen 518055China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

To understand and control the interfacial properties of polydiacetylenes(PDAs)vesicles withπ-conjugated backbone is very important for their colorimetric sensing of chemical and biological *** this work,we adopted 10,12-pentacosadiynoic acid(PCDA)as the model molecule to prepare PDAs vesicles in aqueous solution with different forms(from monomer to blue-to-purple-to-red phase)by controlling the UV irradiation *** variations of the interfacial conformation of PDAs vesicles during chromatic transitions were inspected by the adsorption behaviors of probe molecules(4-(4-diethylaminostyry)-1-methylpyridinium iodide,D289)on vesicle surface with surface-specific second harmonic generation(SHG)and zeta potential *** SHG signal from D289 adsorbed on vesicle surface attenuated sharply,and the adsorption free energy as well as the corresponding two-photon fluorescence signal decreased slightly in chromatic ***,the change in the surface density of the adsorbed D289 molecules for PDAs vesicles with different forms was relatively small as estimated from zeta potential *** attenuation of the SHG intensity was thus attributed to the overall order-disorder transition and the changed orientation of D289 molecules caused by the gradual distortion of carboxyl head group driven by backbone perturbation.

关键词： Polydiacetylenes vesicle Polymerization interfacial adsorption Second harmonic generation Order-disorder transition