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Subclinical impairment of left ventricular myocardium function in type 2 diabetes mellitus patients with or without hypertension

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World Journal of Diabetes 2024年第6期15卷 1272-1279页

作者： Zeng-guang Chen guang-An li Jun Huang li Fan Department of Cardiology The Affiliated Changzhou Second People’s Hospital with Nanjing Medical UniversityChangzhou 213000Jiangsu ProvinceChina Department of Echocardiography The Affiliated Changzhou Second People’s Hospital with Nanjing Medical UniversityChangzhou 213000Jiangsu ProvinceChina

BACKGROUND Cardiovascular disease has been the leading cause of morbidity and mortality for type 2 diabetes mellitus(T2DM)patients over the last *** To determine whether layer-specific global longitudinal strain(GLS)combined with peak strain dispersion(PSD)can be used to assess left ventricle(LV)myocardium systolic dysfunction in T2DM patients or without hypertension(HP).METHODS We enrolled 97 T2DM patients,70 T2DM+HP patients and 101 healthy ***-specific GLS and PSD were calculated by EchoPAC software in apical three-,four-and two-chamber *** of the epimyocardial,middle-layer and endomyocardial(GLSepi,GLSmid,and GLSendo)were measured and *** operating characteristic analysis was performed to detect LV myocardium systolic dysfunction in T2DM *** There were significant differences in GLSepi,GLSmid,GLSendo,and PSD between healthy subjects,T2DM patients and T2DM patients with HP(PT2DM patients>T2DM with HP patients in the absolute values of GLSepi,GLSmid and GLSendo(Plic dysfunction in T2DM patients,however,the area under the curve(AUC)for layer-specific GLS and PSD combined was significantly higher than the AUCs for the individual indices(Plic dysfunction in T2DM patients,T2DM patients with HP.T2DM patients with HP have more severe LV myocardium systolic dysfunction than T2DM patients without HP and normal control *** combination of layer-specific GLS and PSD may provide additional prognostic information for T2DM patients with or without HP.

关键词： Type 2 diabetes mellitus Hypertension Speckle tracking echocardiography Global longitudinal strain Peak strain dispersion

Numerical investigation of CO2 storage in hydrocarbon field using a geomechanical-fluid coupling model

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Petroleum 2016年第3期2卷 252-257页

作者： guang li School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

Increasing pore pressure due to CO2 injection can lead to stress and strain changes of the *** of the safely standards for long term CO2 storage is whether stress and strain changes caused by CO2 injection will lead to irreversible mechanical damages of the reservoir and impact the integrity of caprock which could lead to CO2 leakage through previously sealing *** from storage will compromise both the storage capacity and the perceived security of the project,therefore,a successful CO2 storage project requires large volumes of CO2 to be injected into storage site in a reliable and secure *** hydrocarbon field located in Orods basin was chosen as storage site based on it's stable geological structure and low leakage *** this paper,we present a fluid pressure and stress-strain variations analysis for CO2 geological storage based on a geomechanical-fluid coupling *** nonlinear elasticity theory to describe the geomechanical part of the model,while using the Darcy's law to describe the fluid *** parts are coupled together using the poroelasticity *** objectives of our work were:1)evaluation of the geomechanical response of the reservoir to different CO2 injection scenarios.2)assessment of the potential leakage risk of the reservoir caused by CO2 injection.

关键词： CO2 geological storage Depleted oil field Numerical modeling Geomechanics Geomechanical-fluid coupling model

Preliminary Study on lipase-catalyzed Synthesis of Polyesters Containing L-Malic Acid Units

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Chinese Chemical Letters 2006年第12期17卷 1611-1614页

作者： Da Hu YAO guang Ji li College of Materials Science and Engineer South China University of Technology Guangzhou 510640

Terpolymer of 1, 8-octanediol, adipic acid, and L-malic acid was synthesized via a lipase-catalyzed direct polycondensation. The products were characterized by GPC and 1H NMR. The results indicated that the molecular weight of the prepared polymers decreased with increasing L-malic acid content in the monomer feed ratio, and that change in the L-malic acid content from 0 to 20 mol % did not remarkably influenced on the molecular weight distribution Mw /Ma of the prepared samples. The 1H NMR spectra of the obtained copolymer samples showed that hydroxyl groups of L-malic acid did not take part in the polymerization reaction.

关键词： L-Malic acid polycondensation lipase polyester.

Proteomic Alterations of Antarctic Ice Microalga Chlamydomonas *** Low-Temperature Stress

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Journal of Integrative Plant Biology 2006年第8期48卷 965-970页

作者： guang-Feng Kan Jin-Lai Miao Cui-Juan Shi guang-You li School of the Ocean Harbin Institute of Technology in Weihai Weihai 264209 China Key Laboratory of Marine Bio-active Substances State Oceanic Administration Qingdao 266061 China

Antarctic ice microalga can survive and thrive in cold channels or pores in the Antarctic ice layer. In order to understand the adaptive mechanisms to low temperature, in the present study we compared two-dimensional polyacrylamide gel electrophoresis （2-DE） profiles of normal and low temperature-stressed Antarctic ice microalga Chlamydomonas sp. cells. In addition, new protein spots induced by low temperature were identified with peptide mass fingerprinting based on matrix-assisted laser desorption/ionization time-of-flight mass spectrometry （MALDI-TOF-MS） and database searching. Well-resolved and reproducible 2-DE patterns of both normal and low temperature-stressed cells were acquired. A total of 626 spots was detected in control cells and 652 spots were detected in the corresponding low temperature-stressed cells. A total of 598 spots was matched between normal and stressed cells. Two newly synthesized proteins （a and b） in low temperature-stressed cells were characterized. Protein spot A （53 kDa, pl 6.0） was similar to isopropylmalate/homocitrate/citramalate synthases, which act in the transport and metabolism of amino acids. Protein spot b （25 kDa, pl 8.0） was related to glutathione S-transferase, which functions as a scavenger of active oxygen, free radicals, and noxious metabolites. The present study is valuable for the application of ice microalgae, establishing an ice microalga Chlamydomonas sp. proteome database, and screening molecular biomarkers for further studies.

关键词： Antarctic ice microalga Chlamydomonas sp two-dimensional polyacrylamide gel electrophoresis differentialexpression protein low temperature stress matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS).

Recent progress in layered rare-earth hydroxide (LRH) and its application in luminescence

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Journal of Advanced Ceramics 2017年第3期6卷 177-186页

作者： Qi ZHU Xuejiao WANG Ji-guang li Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education) Northeastern University Shenyang 110819 ChinaInstitute of Ceramics and Powder Metallurgy School of Materials Science and Engineering Northeastern University Shenyang 110819 China Research Center for Functional Materials National Institute for Materials Science Namiki 1-1 Tsukuba Ibaraki 305-0044 JapanCollege of New Energy Bohai University Jinzhou 121000 China Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education) Northeastern University Shenyang 110819 ChinaInstitute of Ceramics and Powder Metallurgy School of Materials Science and Engineering Northeastern University Shenyang 110819 ChinaResearch Center for Functional Materials National Institute for Materials Science Namiki 1-1 Tsukuba Ibaraki 305-0044 Japan

This review article compiles the recent achievements made in layered rare-earth (RE) hydroxide (LRH), including controlled crystallization, structural and morphological features, anion exchange, nanosheet exfoliation, and application in the field of luminescence for both the Ln2(OH)5(Ax-)1/x·nH2O (251-LRH) and Ln2(OH)4(Ax-)2/x·nH2O (241-LRH) phases. The luminescent properties of the LRHs themselves, the oxide, oxysulfate, and oxysulfide phosphors derived from the LRHs via controlled calcination, and the highly oriented transparent phosphor films of enhanced luminescence and/or novel emission features are summarized.

关键词： layered rare-earth hydroxide (LRH) anion exchange exfoliation assembly luminescence

On Chaotification of Discrete Lagrange Systems

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Communications in Theoretical Physics 2006年第5期45卷 861-863页

作者： li guang-Cheng YUE Bao-Zeng Department of Mechanics Beijing Institute of Technology Beijing 100081 China

This paper is concerned with chaotification of discrete Lagrange systems in one dimension, via feedback control techniques. A chaotification theorem for discrete Lagrange systems is established. The controlled systems are proved to be chaotic in the sense of Devaney. In particular, the systems corresponding to the original systems and designed controllers are only required to satisfy, some mild assumptions.

关键词： discrete Lagrange systems chaotification anti-integrable limit

Suppression of Nuclear Drell-Yan Ratio due to Energy Loss

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Chinese Physics Letters 1998年第9期15卷 645-647页

作者： li guang-lie YANG Jian-jun CCAST(Wor1d Laboratory) P.O.Box 8730Beijing 100080 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039 Department of Physics Nanjing Normal UniversityNanjing 210024

Nuclear effect in nuclear Drell-Yan(DY)process is not clear as that in the European muon collaboration(EMC)effect,and many EMC effect models overestimate *** this letter,the energy loss effect in nuclear DY process is studied,and it is found that the nuclear DY ratio is suppressed due to the energy loss which balances the overestimate of the DY ratio in the EMC effect models.

关键词： effect letter estimate

Full Quantum Theory of Molecular Hot-Electroluminescence in Scanning Tunneling Microscope Tunnel Junctions

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Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： Gong Chen Xiao-guang li Zhen-chao Dong International Center for Quantum Design of Functional Materials Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 China International Center for Quantum Design of Functional Materials Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 ChinaShenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055China

The pursuit of nanoscale photonics and molecular optoelectronics has stimulated a lot of interests in scanning tunneling microscope(STM) induced molecular emission. In this work, we have introduced a full quantum mechanical approach instead of the previous semiclassical theory to consider the quantized surface plasmon modes in this system. By considering the mutual interactions between a single molecule and the quantized surface plasmon, we have studied the molecular electroluminescence from STMtunnel junctions. Due to the coupling to the surface plasmons, the spontaneous emission rate and the fluorescence intensity of the molecule are both enormously enhanced. In particular, we show that when the radiative decay rate becomes comparable to the vibrational damping rate, hot-electroluminescence can be observed. All these findings are believed to be instructive for further developments of both molecular electronics and photonics.

关键词： Scanning tunneling microscope induced luminescence Master equation Surface plasmon Hot-electroluminescence

Surjective L^(2)-isometries on the Projection Lattice

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Acta Mathematica Sinica,English Series 2021年第5期37卷 825-834页

作者： li guang WANG Wen Ming WU Wei YUAN School of Mathematical Sciences Qufu Normal UniversityQufu 273165P.R.China School of Mathematical Sciences Chongqing Normal UniversityChongqing 401331P.R.China Institute of Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190P.R.China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049P.R.China

Recently,Gehér and Semrl have characterized the general form of surjective isometries of the set of all projections on an infinite-dimensional separable Hilbert space using unitaries and *** this paper,we study the surjective L^(2)-isometries of the projection lattice of an infinite dimensional Hilbert space and show that every such isometry can also be described by unitaries and antiunitaries.

关键词： Wigner's theorem L^(2)-isometries projections tracial weight