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Chinese Medicine Practice and Research in Hong Kong,China：Current Status and future Direction

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Chinese Journal of Integrative Medicine 2017年第7期23卷 490-493页

作者： bian Zhao-xiang School of Chinese Medicine Hong Kong Baptist UniversityHong Kong SAR China

Historical Review Since the dawn of time,Chinese medicine（CM）has been the major remedy for *** Wah Hospital was found in 1872as the first hospital in Hong Kong to provide free CM service for out-patients and *** to literature,the total patientnumber of Tung Wah Hospital in 1896 was 116,150,45%of the 240,000 population in Hong Kong.

关键词： remedy registered specialty Authority registration qualified rehabilitation moxibustion hasbeen reserved

Isoconversional kinetic analysis of decomposition of bastnaesite concentrates with calcium hydroxide

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Journal of Rare Earths 2020年第12期38卷 1361-1371页

作者： Peng Cen Xue bian Wenyuan Wu School of Metallurgy Northeastern UniversityShenyang 110819China

Isoconversional methods combined with thermogravimetry were applied to investigate the decomposition kinetics of bastnaesite concentrates with different amounts of calcium hydroxide *** apparent activation energy was calculated,and the results indicate that the overall reaction involves more than one single *** reaction with a lower content(15 wt%)involves another step which denotes the decomposition of newly formed calcium carbonate during *** activation energy increases with increasing amount of calcium hydroxide in the lower range(0-15 wt%).This is due to the resistance of calcium hydroxide to heat and mass transport,However,more calcium can promote the decomposition reaction more effectively and thus reduce the activation *** fitting was performed by fitting the experimental data to Avrami-Erofeev model to determine the reaction model and pre-exponential *** theoretical models were proven to be reliable for kinetic prediction.

关键词： Bastnaesite Thermal analysis kinetics Isoconversional method Calcium hydroxide Rare earths

Angiotensin converting enzymes inhibitors or angiotensin receptor blockers should be continued in COVID-19 patients with hypertension

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World Journal of Clinical Cases 2021年第1期9卷 47-60页

作者： Ci Tian Nan Li Yi Bai Han Xiao Shu Li Qing-Gang Ge ning Shen Qing-bian Ma Department of Emergency Medicine Peking University Third HospitalBeijing 100191China Research Center of Clinical Epidemiology Peking University Third HospitalBeijing 100191China Department of Cardiology and Institute of Vascular Medicine Peking University Third HospitalBeijing 100191China Department of Critical Care Medicine Peking University Third HospitalBeijing 100191China Department of Pulmonary and Critical Care Medicine Department of MedicinePeking University Third HospitalBeijing 100191China

BACKGROUND Recent studies have revealed that sustained ingestion of angiotensin converting enzymes inhibitors or angiotensin receptor blockers(ACEIs/ARBs)had no harmful effects on coronavirus disease 2019(COVID-19)patients complicated with *** To investigate the impact on COVID-19 patients complicated with hypertension who discontinued using ACEIs/*** All COVID-19 patients complicated with hypertension admitted to our isolated unit were consecutively recruited in this *** patients switched from ACEIs/ARBs to calcium channel blocker(CCBs)after admission,while others continued using non-ACEIs/*** compared characteristics and clinical outcomes between these two groups of *** A total of 53 patients were enrolled,27 patients switched from ACEIs/ARBs to CCBs while 26 patients continued with non-ACEIs/*** controlling potential confounding factors using the Cox proportional hazards model,hospital stay was longer in patients who discontinued ACEIs/ARBs,with a hazard ratio of 0.424(95%confidence interval:0.187-0.962;P=0.040),upon discharge than patients using other anti-hypertensive drugs.A sub-group analysis showed that the effect of discontinuing use of ACEIs/ARBs was stronger in moderate cases[hazard ratio=0.224(95%confidence interval:0.005-0.998;P=0.0497)].CONCLUSION Patients in the discontinued ACEIs/ARBs group had longer hospital *** findings suggest that COVID-19 patients complicated with hypertension should continue to use ACEIs/ARBs.

关键词： COVID-19 Hypertension Angiotensin converting enzymes inhibitors Angiotensin receptor blockers Angiotensin-converting enzyme-2 Prognosis

Long-wave instabilities

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Science China Mathematics 2024年第8期67卷 1761-1776页

作者： Dongfen bian Emmanuel Grenier School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China Unité de Mathématiques Pures et Appliquées CNRS UMR 5669Ecole Normale Supérieure de LyonLyon 69007France

This paper aims to give a detailed presentation of long-wave instabilities of shear layers for NavierStokes equations,and in particular to give a simple and easy-to-read presentation of the study of the OrrSommerfeld equation and to detail the analysis of its *** these analyses,we prove the existence of long-wave instabilities in the cases of slowly rotating fuids,slightly compressible fuids,or fuids with Navier boundary conditions,under smallness conditions.

关键词： Navier-Stokes equations boundary layers Prandtl equations

Correction Factors of the Approximate Theories for Axisymmetric Modes of Longitudinal Waves in Circular Rods

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Acta Mechanica Solida Sinica 2022年第5期35卷 824-833页

作者： Longtao Xie Chunlei bian Ji Wang Piezoelectric Device Laboratory School of Mechanical Engineering and MechanicsNingbo UniversityNingbo315211China TXC-NBU Joint Center of Research School of Mechanical Engineering and MechanicsNingbo UniversityNingbo315211China

The longitudinal waves guided by rods are widely used in broad engineering *** theories are required to improve the understanding of the longitudinal wave propagation in finite rods in *** correction factors are commonly used in the vibration analyses of beams and plates,but are seldom adopted to the longitudinal wave propagation in rods in a similar *** this paper,the longitudinal and radial displacements in axisymmetric problems of circular rods are expanded in infinite power series of the radial *** using Hamilton’s principle,an infinite one-dimensional system of equations of motion is *** high-order components of stress and strain,and their relations are introduced to obtain the infinite one-dimensional system for the axisymmetric wave propagation in elastic rods.A proper truncation of the infinite equations leads to an approximate theory of a specific *** improve the truncated equations,some high-order components of strain are multiplied by the correction *** correction factors for the first-to fourth-order approximations are systematically determined to ensure that the cutoff frequencies are the same as the exact values calculated by the Pochhmammer–Chree *** frequency spectra,via the well-known Pochhmammer–Chree equation and the approximate theories of order one to four,are presented for comparison in a region where the longitudinal wave is not attenuating and the wavelength in the axial direction is longer than the diameter of the *** to the approximate theories without correction factors,the approximate theories with correction factors show some advantages in accuracy when the branches are high.

关键词： Symmetric wave Approximate theory of rods Correction factor Frequency

Identification of Contaminations Hiding Beneath the α- and β-Subunits of Partially Purified Nitrogenase MoFe Protein on the Sodium Dodecyl Sulfate Gel

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Journal of Integrative Plant Biology 2005年第11期47卷 1364-1371页

作者： Hui-Na ZHOU Ying ZHAO Shao-Min bian Jian-Feng ZHAO Fei REN Huang-Ping WANG Ju-fu HUANG Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China China Agricultural University Beijing 100094 China fujian Normal University Fuzhou 350007 China

To identify the unknown proteins that would contaminate the α- and β-subunits of nitrogenase MoFe protein on sodium dodecyl sulfate-polyacrylamide gel electrophoresis （SDS-PAGE）, the partially purified MoFe protein （Avl） preparation was obtained from Azotobacter vinelandii Lipmann OP by chroma- tography on DEAE-cellulose （DE52） and Sephacryl S-200 columns and analyzed by PAGE and matrix- assisted laser desorption/ionization time-of-flight （MALDI-TOF） mass spectrometry. The Av 1 preparation was shown to have two main bands at the position of the α- and β-subunits of crystalline Avl on the SDS gel. However, on the anoxic native PAGE, in addition to the Avl band, the preparation was shown to have three other main bands that migrated slower than Av 1. Of these three main bands, the protein with the fastest migration was identified as bacterioferritin elsewhere. The proteins on the other two bands, termed Upper and Middle, were suggested to be two different homopolymers with the same apparent subunit electrophoretic mobilities as the α- and β-subunits of Avl, respectively. By analysis of MALDI-TOF mass spectrometry, the Upper was identified as GroEL, which belongs to the heat shock protein 60 family, and the Middle was identified as glucose-6-phosphate isomerase （PGI）. In our preparation, anoxic native electrophoresis indicated that GroEL was composed of 14 identical subunits and that PGI was composed of 10 identical subunits. This is the first report of PGI, with so many subunits. The contaminating proteins in the Av 1 preparation, mainly GroEL and PGI, could be totally or partially removed from Av 1 if the shoulders and center of the elution peak were collected separately from the Sephacryl S-200 column and the center fraction was purified further by Q-Sepharose developed with an NaC1 concentration gradient. Thus, Avl with more than 90% purity was obtained. Obviously, this modified method is useful for the purification of mutant MoFe proteins with a high purity.

关键词： Azotobacter vinelandii chaperonin GroEL glucose-6-phosphate isomerase nitrogenase Av 1.

Simplified creation of polyester fabric supported Fe-based MOFs by an industrialized dyeing process: Conditions optimization, photocatalytics activity and polyvinyl alcohol removal

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Journal of Environmental Sciences 2022年第6期34卷 52-67页

作者： Liran bian Yongchun Dong Biao Jiang Division of Textile Chemistry and Environmental Care School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Textile Composite of Ministry of Education Tiangong UniversityTianjin 300387China

MIL-53(Fe) was successfully prepared and deposited on the surface carboxylated polyester(PET) fiber by an optimized conventional solvothermal or industrialized high temperature pressure exhaustion(HTPE) process to develop a PET fiber supported MIL-53(Fe) photocatalyst(MIL-Fe@PET) for the degradation of polyvinyl alcohol(PVA) in water under light emitting diode(LED) visible irradiation. On the basis of several characterizations, MIL-Fe@PET was tested for the photocalytic ability and degradation mechanism. It was found that temperature elevation significantly enhanced the formation and deposition of MIL-53(Fe) with better photocatalytic activity. However, higher temperature than 130℃ was not in favor of its photocatalytic activity. Increasing the number of surface carboxyl groups of the modified PET fiber could cause a liner improvement in MIL-53(Fe) loading content and photocatalytic ability. High visible irradiation intensity also dramatically increased photocatalytic ability and PVA degradation efficiency of MIL-Fe@PET. Na_(2)S_(2)O_(8) was used to replace H_(2)O_(2) as electron acceptor for further promoting PVA degradation in this system. MIL-Fe@PET prepared by HTPE process showed higher MIL-53(Fe) loading content and slightly lower PVA degradation efficiency than that prepared by solvothermal process at the same conditions. These findings provided a practical strategy for the large-scale production of the supported MIL-53(Fe) as a photocatalyst in the future.

关键词： MIL-53(Fe) Polyester fabric Exhaustion dyeing Visible light photocatalyst Polyvinyl alcohol removal

SSVEP-based brain-computer interfaces are vulnerable to square wave attacks

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Science China(Information Sciences) 2022年第4期65卷 80-92页

作者： Rui bian Lubin MENG Dongrui WU School of Artificial Intelligence and Automation Huazhong University of Science and Technology Zhejiang Lab

Electroencephalogram(EEG) based brain-computer interfaces(BCIs) have attracted wide attention in recent years. Steady-state visual evoked potential(SSVEP) is one of the most popular BCI paradigms,which has high information transmission rate and short user calibration time. Recent research has shown that EEG-based BCIs are under the threat of adversarial examples. However, existing attack approaches are very difficult to implement in a real-world system. Considering SSVEP’s dependency on the frequency information, this paper proposes to use square wave signals as adversarial perturbations to attack SSVEP-based BCIs, which are easy to generate and apply in practice. EEG trials contaminated by the square wave perturbation can be classified into any target class specified by the attacker. Compared with previous approaches,our perturbation can be implemented much more easily. Experiments on two SSVEP datasets demonstrated the efficiency and robustness of the proposed approach in attacking two SSVEP classifiers based on canonical correlation analysis, exposing a critical security problem in SSVEP-based BCIs.

关键词： electroencephalogram Electroencephalogram brain-computer interface steady-state visual evoked potential adversarial attack

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Effect of Ti（lll） Surface Defects on the Process of Photocatalytic Reduction of Hexavalent Chromium

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Chinese Journal of Chemistry 2017年第2期35卷 203-208页

作者： Hongxia Qin Yingying bian Yaxi Zhang Longfei Liu Zhenfeng bian Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth functional Materials Shanghai Normal University Shanghai 200234 China

In this paper, the process of photocatalytic reduction of hexavalent chromium was investigated over Ti3＋- modified TiO2 photocatalysts. The Ti3＋ surface defects were repaired by annealing as-prepared sample at different temperatures to control the amount of Ti3＋ sites. The samples were characterized by SEM, XRD, BET, UV-Vis absorption, EPR and XPS. The results showed Ti3＋ defects were successfully doped in TiO2. The surface selective adsorption of hexavalent chromium [Cr2072 （Cr（VI））] and the desorption of trivalent chromium [Cr3＋（Cr（III））] were investigated during the process ofphotocatalytic reduction positive charges due to more Ti3＋ defects on the surface show a Accordingly, the surface positive reduction of Cr（VI）. charges controlled by the Ti3＋ Zeta potential results presented that the increased significant improvement for adsorption of Cr（VI）. defects play important roles in the photocatalytic

关键词： Ti3+ modification titanium dioxide photocatalytic reduction hexavalent chromium surface selective adsorption and desorption