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Supramolecular self-assembly of two-component systems comprising aromatic amides/Schiff base and tartaric acid

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 1112-1121页

作者： xin Wang Wei cui Bin Li Xiaojie Zhang Yongxin Zhang Yaodong Huang Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China

The gelating properties and thermotropic behaviors of stoichiometric mixtures of aromatic amides 1,2,and the aromatic Schiffbase 3 with tartaric acid(TA)were *** the three gelators,2-TA exhibited superior gelating *** 2-TA exhibits a smectic B phase and an unidentified smectic mesophase during both heating and cooling *** results of Fourier transform infrared spectroscopy and X-ray diffraction revealed the existence of hydrogen bonding and rc-ninteractions in 2-TA systems,which are likely to be the dominant driving forces for the supramolecular ***,it was established that all of the studied gel self-assemblies and mesophases possess alamellar *** anion response ability of the tetrahydrofuran gel of 2-TA was evaluated and it was found that it was responsive to the stimuli of F,Cl,Br,I,AcO.

关键词： supramolecular self-assembly organogel liquid crystal tartaric acid hydrogen bond

Functional Liver Imaging Score Derived from Gadoxetic Acid-enhanced MRI Predicts Cachexia and Prognosis in Hepatocellular Carcinoma Patients

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Current Medical Science 2024年第5期44卷 1018-1025页

作者： xin-xiang LI Bing LIU Yu-fei ZHAO Yang JIANG Ying cui xin-gui PENG Nurturing Center of Jiangsu Province for State Laboratory of AI Imaging&Interventional Radiology Department of RadiologyZhongda HospitalSchool of MedicineSoutheast UniversityNanjing210009China Department of Radiology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230001China

Objective Cachexia occurs in approximately half of hepatocellular carcinoma(HCC)patients as the disease progresses and is correlated with a poor ***,early identification of HCC patients at risk of developing cachexia and their prognosis is *** study investigated the functional liver imaging score(FLIS)derived from gadoxetic acid-enhanced magnetic resonance imaging(MRI)to identify cachexia in HCC patients and their *** Pretreatment clinical and MRI data from 339 HCC patients who underwent gadoxetic acid-enhanced MRI scans were retrospectively *** weights were recorded for 6 months following the MRI scan to diagnose *** FLIS was calculated as the sum of the enhancement quality score,the excretion quality score,and the portal vein sign quality score.A Cox proportional hazards model was used to determine the significant factors affecting overall survival(OS).Multivariable logistic regression was then conducted to identify variables predicting cachexia in HCC patients,which were subsequently used to predict *** Cox regression analysis revealed a significant association between cachexia and worse *** FLIS(0–4 vs.5–6 points)(OR,9.20;95%CI:4.68–18.10;P100 ng/mL(OR,4.08;95%CI:2.13–7.83;P<0.001)emerged as significant predictors of cachexia in patients with ***,FLIS(0–4 vs.5–6 points)(HR,1.73;95%CI:1.19–2.51;P=0.004)was significantly associated with *** in the FLIS 0–4 points group had shorter OS than those in the FLIS 5–6 points group[20 months(95%CI,14.7–25.3)vs.43 months(95%CI,27.7–58.3);P=0.001].Conclusion Cachexia was associated with worse *** functional liver imaging score emerged as a significant predictor of cachexia in HCC patients and their prognosis.

关键词： cachexia hepatocellular carcinoma functional liver imaging score magnetic resonance imaging

Roles of pH in the NH_(4)^(+)-induced corrosion of AZ31 magnesium alloy in chloride environment

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Journal of Magnesium and Alloys 2022年第11期10卷 3167-3178页

作者： Feng Ge Jiaxuan Yin Yue Liu Wenjun Leng xin Wang Zhongyu cui School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Corrosion behavior of AZ31 magnesium alloy in NH_(4)^(+)-bearing chloride solution with controlled pH was investigated by weight loss experiment, hydrogen collection, and electrochemical test combined with surface morphology and topography observation. The results show that NH_(4)^(+) and pH of the solution can affect the corrosion of AZ31 magnesium alloy. The existence of NH4+affects the formation and dissolution of corrosion products, which makes the protective effect of the corrosion product layer weaker. The change of pH value not only affects the corrosion mechanism of AZ31, but also alters the concentration of NH_(4)^(+) ions in the solution, which further influences the corrosion product layer of AZ31, and finally makes the corrosion of AZ31 change significantly.

关键词： NH_(4)^(+) pH AZ31 magnesium alloy Corrosion

Effects of Al Addition on the Thermoelectric Properties of Zn-Sb Based Alloys

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Chinese Journal of Mechanical Engineering 2009年第2期22卷 270-275页

作者： cui Jiaolin LIU Xianglian YANG Wei CHEN Dongyong MAO Liding QIAN xin School of Mechanical Engineering Ningbo University of Technology Ningbo 315016 China School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221008 China College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou 310014 China

The β-Zn4Sb3, emerged as a compelling p-type thermoelectric material, is widely used in heat-electricity conversion in the 400-650 K range. In order to probe the effects of slight doping on the crystal structure and physical properties, we prepared the samples of Al-added Zn-Sb based alloys by spark plasma sintering and evaluated their microstructures and thermoelectric properties. After a limited A1 addition into the Zn-Sb based alloys we observed many phases in the alloys, which include a major phase β-Zn4Sb3, intermetallic phases ZnSb and A1Sb. The major β-Zn4Sb3 phase plays a fundamental role in controlling the thermoelectric performance, the precipitated phases ZnSb and AISb are of great importance to tailor the transport properties, such as the gradual enhancement of lattice thermal conductivity, in spite of an increased phonon scattering in additional grain boundaries. The highest thermoelectric figure of merit of 0.55 is obtained for the alloy with a limited A1 addition at 653 K, which is 0.08 higher than that of un-doped β-Zn4Sb3 at the corresponding temperature. Physical property experiments indicate that there is a potentiality for the improvement of thermoelectric properties if a proper elemental doping is carried out into the Zn-Sb based alloys, which was confirmed by A1 addition in the present work.

关键词： thermoelectric properties Zn-Sb based alloys A1 addition

Integrated spoof plasmonic circuits

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Science Bulletin 2019年第12期64卷 843-855页

作者： Jingjing Zhang Hao-Chi Zhang xin-xin Gao Le-Peng Zhang Ling-Yun Niu Pei-Hang He Tie-Jun cui State Key Laboratory of Millimeter Waves Southeast University

Using a metamaterial consisting of metals with subwavelength surface patterning, one can mimic surface plasmon polaritons(SPPs) and achieve surface waves with subwavelength confinement at microwave and terahertz frequencies, thus bringing most of the advantages associated with the optical SPPs to lower frequencies. Due to the properties of strong field confinement and high local field intensity, spoof SPPs have demonstrated the improved performance for data transmission and device miniaturization in an intensively integrated environment. The distinctive abilities, such as suppression of transmission loss and bending loss, and increase of signal integrity, make spoof SPPs a promising candidate for future generation of electronic circuits and electromagnetic systems. This article reviews the progress in spoof SPPs with a special focus on their applications in circuits from transmission lines to passive and active devices in microwave and terahertz regimes. The integration of versatile spoof SPP devices on a single platform,which is compatible with established electronic circuits, is also discussed.

关键词： Spoof surface plasmons Metamaterial Electromagnetic system Integrated circuits

Regulation of Ti(C,N)deposition on hot surface of refractory in blast furnace hearth

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Journal of Iron and Steel Research International 2024年第6期31卷 1423-1435页

作者： Jian Cao cui Wang Jjan-liang Zhang Ke-xin Jiao Guo-hua Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

Ti(C,N)concentration was found to be lower on the hearth sidewall of a blast furnace and increased gradually toward the bottom of the blast *** Ti(C,N)protective layer in a blast furnace is ***,the formation of a Ti(C,N)protective layer was promoted by studying the heterogeneous nucleation principle of titanium compounds on different substances and regulation measures for the deposition process of titanium compounds on refractories or *** lattice disregistry between the titanium compounds and the main components in the refractory or the main impurities in the protective layer was calculated using a two-dimensional disregistry equation to study the heterogeneous nucleation principle of titanium *** results revealed that in refractory materials,the heterogeneous nucleation of carbonitride is weak when C,SiO_(2),and Al_(2)O_(3) are used as heterogeneous nucleation substrates,and the heterogeneous nucleation of carbonitride is strong when TiO_(2) and SiC are used as heterogeneous nucleation *** nucleation phases,TiC,TiN,Ti(C_(0.3),N_(0.7)),and Ti(C_(0.5),N_(0.5))have similar heterogeneous nucleation ability in single component refractory,and the type of carbonitride has little effect on the lattice *** impurities in the protective layer as the substrate phases are not conducive to the heterogeneous nucleation of *** CaS was used as the substrate phase,the heterogeneous nucleation ability of carbonitride was the *** carbon and alumina were not conducive to the heterogeneous nucleation of carbonitride,but carbon was more unfavourable than alumina.

关键词： Ti(C,N) Lattice disregistry Lattice constant Heterogeneous nucleation Regulation measure

Mesenchymal stem cells,extracellular vesicles,and transcranial magnetic stimulation for ferroptosis after spinal cord injury

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Neural Regeneration Research 2023年第9期18卷 1861-1868页

作者： Qi-Feng Song Qian cui Ya-Shi Wang Li-xin Zhang Department of Rehabilitation Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

Spinal cord injury is characte rized by diffe rent aetiologies,complex pathogenesis,and diverse pathological *** treatments are not ideal,and prognosis is generally *** spinal cord injury,neurons die due to various forms of cell *** them,fe rroptosis causes dysfunction after spinal cord injury,and no existing traditional treatments have been indicated to block its ***,emerging therapies using mesenchymal stem cells,extracellular vesicles,and transcranial magnetic stimulation therapy are promising for reve rsing spinal co rd neuronal ferroptosis after spinal cord ***,no definitive studies have demonstrated the effectiveness of these *** review summarizes the existing research on the mechanisms of ferroptosis;fe rroptosis after spinal cord injury;treatment of spinal cord injury with mesenchymal stem cells,extracellular vesicles,and transc ranial magnetic stimulation;and treatment of ferroptosis using mesenchymal stem cells,extracellular vesicles,and transc ranial magnetic *** ferroptosis can promote the reversal of neurological dysfunction after spinal cord *** addition,mesenchymal stem cells,extracellular vesicles,and transc ranial magnetic stimulation can reve rse adverse outcomes of spinal cord injury and regulate ferroptosis-related fa ***,it can be inferred that mesenchymal stem cells,extracellular vesicles,and transcranial magnetic stimulation have the potential to inhibit fe rroptosis after spinal cord *** review serves as a reference for future research to confirm these conclusions.

关键词： exosomes extracellular vesicles ferroptosis iron overload lipid peroxidation mesenchymal stem cells miRNAs spinal cord injury stem cells transcranial magnetic stimulation

Regioselective B—H/C—H Bond Activation at Azo-Substituted Carboranes Induced by Half-Sandwich Iridium(III)Complex

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Chinese Journal of Chemistry 2021年第2期39卷 281-287页

作者： Peng-Fei cui Yang Gao Shu-Ting Guo Guo-xin Jin Department of Chemistry Fudan UniversityState Key Laboratory of Molecular Engineering of PolymersShanghai200433 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032 China

We report herein a practical approach for regio-selective B—H/C—H bond activation at azo-substituted carboranes. The reaction proceeded through Iridium(III)-induced selective B—H/C—H bond activations based on an azo directing group. Through this strategy, a series of mononuclear, trinuclear and tetranuclear cyclometalated iridium complexes containing Cp*Ir—B or Cp*Ir—C bonds were successfully isolated in a high yield. In this work, efficient routes are developed through one-pot reactions to prepare polynuclear organometallic complexes.

关键词： Carborane B-H bond activation Half-sandwich Iridium Polynuclear

Synthesis of mechanically robust porous carbon monoliths for CO2 adsorption and separation

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Journal of Energy Chemistry 2020年第3期29卷 56-61页

作者： Jie Du Wen-cui Li Zhan-xin Ren Li-Ping Guo An-Hui Lu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina

Porous carbon materials with developed porosity,high surface area and good thermal-and chemicalresistance are advantageous for gas adsorption and ***,most carbon adsorbents are in powder form which exhibit high pressure drop when deployed in practical separation *** monolithic carbons have largely addressed the pulverization problem and preserved kinetics and usually suffer from abrasion during multiple adsorption-desorption ***,we proposed the designed synthesis of mechanically robust carbon monoliths with hierarchical pores,solid nitrogen-containing *** synthesis started with the polymerization of resorcinol and formaldehyde under weakly acidic conditions generated from cyanuric acid,and then an appropriate amount of hexamethylenetetramine(HMTA)was added as a crosslinker to prompt the formation of three dimensional *** carbonization process,the as-obtained porous carbon monoliths have a high radial compressive strength of 886 N/cm as well as a BET specific surface area of up to 683 m2/*** approximately 1 bar,the CO2 equilibrium capacities of the monoliths are in the range of 3.1–4.0 mmol/g at 273 K and of 2.3–3.0 mmol/g at 298 K,exhibiting high selectivity for the capture of CO2 over N2 from a stream which consists of 16.7%(v%)CO2 in ***,they undergo a facile CO2 release in an argon stream at 298 K,indicating a good regeneration *** cycle testing,sieving and regeneration,the adsorbent has no mass loss,compared to that of its fresh counterpart.

关键词： Carbon monoliths High mechanical strength Adsorption Gas separation