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Effect of Tai Chi on Cardiac and Static Pulmonary Function in Older Community-Dwelling Adults at Risk of Ischemic Stroke: A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2019年第8期25卷 582-589页

作者： zheng Guo-hua zheng Xin LI Jun-zhe duan Ting-jin TAO Jing CHEN Li-dian College of Nursing and Health Management Shanghai University of Medicine and Health Sciences Shanghai (201318) China College of Rehabilitation Medicine Fujian University of Traditional Chinese Medicine Fuzhou (350122)China Department of Physical Education Fujian University of Traditional Chinese Medicine Fuzhou (350122)China Fujian Key Laboratory of Rehabilitati on Tech no logy Fujia n Un iversity of Traditional Chinese Medicine Fuzhou (350122)China Collaborative Inno vation Cen ter for Rehabilitati on Tech no logy Fujian University of Traditional Chinese Medicine Fuzhou (350122)China

Objective: To evaluate the effect of tai chi exercise on cardiac and static lung function for older community-dwelling adults at risk of ischemic stroke. Methods: A total of 170 older community-dwelling adults (aged 55–75 years old) at risk of ischemic stroke were allocated to either tai chi training group (85 cases, five 60-min sessions of tai chi training per week for 12 weeks) or control group (85 cases, usual pbysical activity for 12 weeks) using a computer-generated randomization. The echocardiographic parameters of cardiac structure, cardiac function and static lung function were measured at baseline, after 12 weeks of intervention and additional 12-week follow-up period by a blinded professional staff member using a color Doppler ultrasound imaging device or a cardiopulmonary function instrument. The t test and linear mixed model based on the intention-to-treat analysis principle was used to calculate the effect. The adverse effect was observed. Results: Most of echocardiographic parameters on the cardiac structure, cardiac function and static lung function between the tai chi group and control group did not have a significant difference either post 12-week intervention or additional 12-week follow-up period. Only three parameters involving in right ventricular diameter (P=0.024), main pulmonary artery diameter (P=0.002) and vital capacity maximum (P=0.036) were beneficial to be improved in the tai chi group compared to the control group by the analysis of mixed linear model. No adverse effects were found during the intervention period. Conclusions: The 12-week tai chi exercise did not have an obvious beneficial effect on cardiac structure, cardiac function and static lung function in older community-dwelling adults at risk of ischemic stroke.(Trial registration No. ChiCTR-TRC-13003601)

关键词： tai chi cardiac structure and function static lung function ischemic stroke randomized controlled trial

Collaborative control of fine particles and ozone required in China for health benefit

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 1-11页

作者： Ling Qi Zhige Tian Nan Jiang Fangyuan zheng Yuchen Zhao Yishuo Geng Xiaoli duan School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

PM2.5 concentration declined significantly nationwide,while O3 concentration increased in most regions in China in 2013–*** evidences proved that peak season O3 is related to increased death risk from non-accidental and respiratory *** on these new evidences,we estimate excess deaths associated with long-term exposure to ambient PM2.5 and O3 in China following the counterfactual analytic framework from Global Burden *** deaths from non-accidental diseases associated with long-term exposure to ambient O3 in China reaches to 579(95%confidential interval(CI):93,990)thousand in 2020,which has been significantly underestimated in previous *** addition,the increased excess deaths associated with long-term O3 exposure(234(95%CI:177,282)thousand)in 2013–2020 offset three quarters of the avoided excess deaths(302(95%CI:244,366)thousand)mainly due to PM2.5 exposure *** key regions(the North China Plain,the Yangtze River Delta and the Fen-Wei Plain),the former is even larger than the latter,particularly in 2017–*** benefit of PM2.5 concentration reduction offsets the adverse effects of population growth and aging on excess deaths attributed to PM2.5 *** of excess deaths associated with O3 exposure is mainly due to the strong increase of O3 concentration,followed by population *** the faster population aging process in the future,collaborative control,and faster reduction of PM2.5 and O3 are needed to reduce the associated excess deaths.

关键词： Excess deaths Long-term exposure Fine particle Ozone

Mechanism of phthalic acid collector in flotation separation of fluorite and rare earth

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Journal of Rare Earths 2022年第1期40卷 118-126页

作者： Sheng Chang Mei Li Kai Gao Dongliang Zhang Haijun duan Linlin Ma zheng Ruan College of Mining Inner Mongolia University of Science&TechnologyBaotou 014010China Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources Ministry of Education Baotou 014010China Inner Mongolia Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application Baotou 014010China Inner Mongolia Mining Exploitation Co. Ltd.Hohhot 010020China

The mechanism of phthalic acid,a dicarboxylic acid collector,in flotation separation of fluorite and rare earth(RE)was studied in this *** experimental data of flotation show that phthalic acid,as the collector,can realize highly efficient separation of fluorite and rare earth under weakly acidic *** adsorption mechanism of phthalic acid on the surface of fluorite and bastnaesite was analyzed in this paper by means of the zeta potential measurement,the Fourier transform infrared(FT-IR),the X-ray photoelectron spectroscopy(XPS)and the stability constant measurement of active metal ion and phthalic acid coo rdination *** to the zeta potential testing results,the surfaces of fluorite adsorb the collector phthalate ion with negative charge under weakly acidic conditions which,in turn,increases its electronegativity and results in the motion of its *** the reaction between phthalic acid and fluorite ores under weakly acidic conditions,the peak of the fluorite ores is found to have significant changes in the FT-IR results,indicating strong chemical adsorption on the surfaces of phthalic acid and fluorite *** to the XPS analysis,the peak of benzene ring of phthalic acid is as high as 2%on the surface of fluorite,while no obvious characteristic peak of benzene ring is found on the surface of *** to the pH potentiometric titration results,the stability constant Ktotal of calcium phthalate complex within the acid range is higher than the stability constant K’total of cerium phthalate complex,indicating that the complex generated between phthalic acid and Ca^(2+)is more stable than the complex generated between phthalic acid and Ce^(3+).The possible reason is that Ca^(2+),with the highest reticular density,plays a prevailing role in the octahedron structure of fluorite amidst the acidic *** the active point of flotation,Ca^(2+)works with the carboxyl groups of the collector phthalic acid(-C=O-)to form

关键词： Fluorite Bastnaesite Carboxylic acid collector Flotation Equilibrium constants of complexes Rare earths

Assembly of N-and P-functionalized carbon nanostructures derived from precursor-defined ternary copolymers for high-capacity lithiumion batteries

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Chinese Journal of Chemical Engineering 2023年第1期53卷 280-288页

作者： Luyao Guo Mengru Wang Ronghe Lin Jiaxin Ma Shuanghao zheng Xiaoling mou Jun Zhang Zhong-Shuai Wu Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Yuquan Road 19AShijingshan DistrictBeijing 100049China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesZhongshan Road 457Dalian 116023China

Synthesis of new carbon nanostructures with tunable properties is vital for precisely regulating electrochemical performance in the wide ***,we report a novel approach for the oxidative polymerization of N-and P-bearing copolymers from the self-assembly of three different monomers(aniline,pyrrole,and phytic acid),and further prepare the respective carbon nanostructures with relatively consistent N dopant(6.2%–8.0%,atom)and varying P concentrations(0.4%–2.8%,atom)via controllable *** impacts of phytic acid addition on the compositional,structural,and morphological evolution of the copolymers and the resulting nanocarbons are well studied through a spectrum of characterizations including N2 sorption,Fourier transform infrared spectroscopy,gel permeation chromatograph,scanning/transmission electron microscopy,and X-ray photoelectron *** fragmentation of the nanosphere structures is evidenced with increasing addition of phytic acid,leading to different nanostructures from hollow nanospheres to 3D *** decorated with N and P dopants from pyrolysis are further utilized as anode materials in lithium-ion batteries,demonstrating enhanced electrochemical performance,i.e.,a reversible capacity of 380 mAhg^(-1)at 2 Ag^(-1)for NPC-0.5 during 200 *** superior performance originates from the balanced porosity,and appropriate concentrations of P and pyrrolic N,thus pointing the direction for designing high-performance anode materials.

关键词： Carbon nanospheres Doping Lithium-ion batteries Polymers Porosity

Evaluation of Some Fourier Integrals in N-Dimensional Space for the Theory of Dislocations in Quasicrystals

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Wuhan University Journal of Natural Sciences 2001年第4期6卷 787-790页

作者： Yao duan-zheng Ding Di-hua Wang Ren-hui Hu Cheng-zheng School of Physics and Technology Wuhan University Wuhan 430072 China

A method to evaluate some Fourier integrals is extended from two-dimensional (2-D) and three dimensional (3-D) spaces ton-dimensional (n-D) space, which are often used in the elasticity theory of dislocations in quasi... 详细信息

关键词： quasicrystals dislocation Fourier integral elasticity theory

A critical review of on-site inorganic arsenic screening methods

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Journal of Environmental Sciences 2023年第3期125卷 453-469页

作者： Yi He Jingyu Liu Yanhua duan Xiaofei Yuan Lulu Ma Ratan Dhar Yan zheng Department of Sciences John Jay College and the Graduate CenterThe City University of New YorkNY 10019USA State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Queensland Alliance for Environmental Health Sciences(QAEHS) The University of QueenslandQLD 4102Australia Department of Earth and Physical Sciences York CollegeThe City University of New YorkNY 11451USA

Approximately 94 to 220 million people worldwide are at risk of drinking well water containing arsenic > 10 μg/L, the WHO guideline value. To identify non-compliant domestic wells, assess health risks and reduce exposure, accurate and rapid on-site inorganic arsenic screening methods are desirable because all domestic wells worldwide need to be ***, the principles, advantages and limitations of commonly used colorimetry, electrochemistry, and biosensing methods are critically reviewed, with the performance compared with laboratory-based benchmark methods. Most commercial kits are based on the classic Gutzeit reaction. Despite being semi-quantitative, the more recent and more expensive products display improved and acceptable accuracy and shorter testing time (~10 min). Carried out by trained professionals, electrochemical methods are also feasible for on-site analysis, although miniaturization is desirable yet challenging. Biosensing using whole bacterial cells or bio-engineered materials such as aptamers is promising, if incorporated with function specific nanomaterials and biomaterials. Since arsenic is frequently found as arsenite in reducing groundwater and subject to oxidation during sampling, transportation and storage, on-site separation and sample preservation are feasible but the specific methods should be chosen based on sample matrix and tested before use. To eliminate arsenic exposure among hundreds of millions of mostly rural residents worldwide, we call for concerted efforts in research community and regulatory authority to develop accurate, rapid, and affordable tests for on-site screening and monitoring of arsenic in drinking water. Access to affordable testing will benefit people who are socioeconomically disadvantaged.

关键词： Inorganic arsenic On-site analysis Drinking water Groundwater Field test

干湿交替灌溉与植物生长调节剂对水稻光合特性及内源激素的影响

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作物学报 2025年第1期51卷 174-188页

作者：赵黎明段绍彪项洪涛郑殿峰冯乃杰沈雪峰广东海洋大学滨海农业学院广东湛江524088 黑龙江省农业机械工程科学研究院绥化分院黑龙江绥化152054

为探明干湿交替灌溉与植物生长调节剂(plant growth regulators, PGRs)对水稻光合特性、内源激素及产量的影响。采用盆栽与大田相结合方式,以龙粳31为试验材料,设置轻干湿交替灌溉(MI)和重干湿交替灌溉(HI)2种灌溉处理,于分蘖盛期和剑... 详细信息

为探明干湿交替灌溉与植物生长调节剂(plant growth regulators, PGRs)对水稻光合特性、内源激素及产量的影响。采用盆栽与大田相结合方式,以龙粳31为试验材料,设置轻干湿交替灌溉(MI)和重干湿交替灌溉(HI)2种灌溉处理,于分蘖盛期和剑叶展叶期喷施已酸二乙氨基乙醇酯(diethylaminoethylcaproate,DA)、6-苄氨基腺嘌呤(6-benzylaminoadenine,BA)和BA(分蘖盛期)+DA(剑叶展叶期)3种PGRs,并设置清水对照,探究干湿交替灌溉、PGRs及互作下干物质积累、光合特性、内源激素及产量差异。结果表明,与HI相比, MI显著增加了抽穗后叶面积、叶面积指数、SPAD值及净光合速率,提高了剑叶与籽粒IAA、GA3和ZR含量,降低了ABA含量,增加了干物质积累及茎鞘物质转运能力,并在改善节间性状基础上增加了结实率、每穗粒数及粒重,增产5.30%(盆栽)和5.11%(大田)。与CK相比,喷施BA+DA显著提高了抽穗后剑叶净光合速率、干物质积累及茎鞘物质转运能力,提高了剑叶与籽粒IAA、GA3和ZR含量,增加了千粒重、结实率、收获指数、每穗粒数和粒重,增产6.60%(盆栽)和6.05%(大田),其次是BA。干湿交替灌溉与PGRs互作对叶面积指数、内源激素含量、每穗粒数及千粒重存在显著影响,其中MI×(BA+DA)处理更有助于维持抽穗后绿叶功能持续期,提高叶片SPAD值、叶面积、叶面积指数和净光合速率,增强干物质积累及茎鞘物质转运能力,提高叶片与籽粒IAA、GA3和ZR含量,促进同化物向籽粒输出,并在稳定穗数基础上增加了千粒重、每穗粒数和粒重,提高了结实率和收获指数,实现产量较其他处理及CK增幅3.17%~12.57%(盆栽)和3.14%~11.55%(大田),而HI×(BA+DA)处理可实现MI×CK产量效果。综上所述,干湿交替灌溉配合喷施BA+DA可作为本区域水稻高产高效生产环节中的一种节水化控栽培组合措施。

关键词：水稻干湿交替灌溉植物生长调节剂光合特性内源激素产量

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Thermodynamically Revealing the Essence of Order and Disorder Structures in Layered Cathode Materials

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Chinese Journal of Structural Chemistry 2019年第12期38卷 2020-2026页

作者： zheng Ze WENG mou-Yi YANG Lu-Yi HU Zong-Xiang CHEN Zhe-Feng PAN Feng School of Advanced Materials Shenzhen Graduate SchoolPeking University

Layered transition metal(TM) oxides are one of the most widely used cathode materials in lithium-ion batteries. The atomic configuration in TM layer of these materials is often known to be random when multiple TM elements co-exist in the layer(e.g. Ni, Co and Mn). By contrast, the configuration tends to be ordered if the elements are Li and Mn. Here, by using special quasi-random structures(SQS) algorithm, the essential reasons of the ordering in a promising Li-rich Mn-based cathode material Li2MnO3 are investigated. The difference of internal energy and entropy between ordered and disordered materials is calculated. As a result, based on the Gibbs free energy, it is found that Li2MnO3 should have an ordered structure in TM layer. In comparison, structures with Ni-Mn ratio of 2:1 are predicted to have a disordered TM layer, because the entropy terms have larger impact on the structural ordering than internal energy terms.

关键词： entropy special quasi-random structures(SQS) layered cathode materials Gibbs free energy

Research progress on 2D ferroelectric and ferrovalley materials and their neuromorphic application

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Science China(Physics,Mechanics & Astronomy) 2023年第11期66卷 55-76页

作者： Yifan Tan Junding zheng Xuezhong Niu Yifeng Zhao Ni Zhong Bobo Tian Chungang duan Key Laboratory of Polar Materials and Devices Ministry of EducationShanghai Center of Brain-inspired Intelligent Materials and DevicesDepartment of ElectronicsEast China Normal UniversityShanghai200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan030006China

Two-dimensional(2D)ferroelectric and ferrovalley materials have recently received extensive attention due to their significant advantages for modern electronic devices,such as miniaturization,low-dissipation,non-volatility,and *** interestingly,the couplings between the ferroic orders in these materials have enriched the development of intelligent devices,especially in neuromorphic *** this paper,the research progress of 2D ferroelectric and ferrovalley materials is introduced and the coupling effects between them are also ***,we briefly introduce recent neuromorphic computing reports based on 2D ferroelectric materials and give perspectives on ferrovalley neuromorphic devices.

关键词： two-dimensional materials ferroelectric materials multiferroic coupling neuromorphic application