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为波士顿非洲裔居民提供食品以帮助未经治疗的高血压成人终止高血压试验的基本原理和设计

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中华高血压杂志(中英文) 2024年第1期32卷 100-100页

作者： Turkson-Ocran RN Cluett JL Fitzpatrick SL Kraemer KM Mc Manus K Mukamal KJ Davis RB Elborki M Ferro K Ismail N Laura AE Larbi KF Castilla-Ojo N Grobman B Seager R Hines AL Miller ER Crews dc Juraschek SP 刘青

不健康的膳食是影响非洲裔成年人高血压差异的重要因素。终止高血压膳食疗法(dietary approaches to stop hypertension,DASH)的膳食模式可以降低血压,但食品荒漠的城市居民难以接触到DASH模式的食品,这是主要的障碍。方法:为波士顿非...

不健康的膳食是影响非洲裔成年人高血压差异的重要因素。终止高血压膳食疗法(dietary approaches to stop hypertension,DASH)的膳食模式可以降低血压,但食品荒漠的城市居民难以接触到DASH模式的食品,这是主要的障碍。方法:为波士顿非洲裔居民提供食品以帮助未经治疗的高血压成人终止高血压(Go Feshr,GF)研究是解决预防高血压的社会决定因素(addressing social determinants to prevent hypertension,RESTORE)网络的五个项目之一。

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Comparative studies on the concerted and two-step mechanism of ketene-methylenimine cycloaddition

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Chinese Journal of Chemistry 1996年第2期14卷 97-104页

作者： Fang, dc Fu, XY BEIJING NORMAL UNIV DEPT CHEMBEIJING 100875PEOPLES R CHINA

The concerted reaction mechansim of the ketene-methylenimine cycloaddition reaction was reconfirmed by IRC calculation at HF/6-31G* level. Other possible reaction schemes were also studied. The cis and gauch intermediate cannot be found on the potential energy surface, and the trans intermediate can only lead to a 6-membered ring product. Therefore, a two step mechanism to form p-lactam is excluded for the title reaction.

关键词： ketene methylenimine cycloaddition mechanism

Isomeric structures, isomerization and decomposition of silylenoids H2SiMX(MX=KF,KCl LiBr,NaBr and KBr)

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Chinese Journal of Chemistry 1995年第6期13卷 481-486页

作者： Feng, dc Feng, SY Deng, CH SHANDONG UNIV INST THEORET CHEMSHANDONG 250100PEOPLES R CHINA

The isomeric structures, isomerization and decomposition of silylenoids H(2)SiMX (MX=KF, KCl, LiBr, NaBr and KBr) have been investigated by ab initio molecular orbital theory. These silylenoids have four kinds of very similar equilibrium structures. The three-membered ring and p-complex structures should be stable and experimentally detectable. The lifetime of sigma-complex and tetrahedral structures would be very short and experimentally undetectable.

关键词： silylenoids H(2)SiMX isomeric structures isomerization decomposition

Random walk terminally attached to wall on different lattices

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Chinese Science Bulletin 1997年第5期42卷 433-437页

作者： Wu, dc Liao, Q Light Industry and Textile College Sichuan Union University Chengdu China

SINCE the concept of random walks (RW) was propounded formally by Pearson in 1905, there has been extensive research in mathematics. Then it expanded to many areas such as physics, chemistry, biology, engineering, commerce and social studies. The study of confined RW is interesting because of the practical applications. An RW terminally attached to an impene-

关键词： random walks lattice model absorbing wall tail chain.

EFFECT　OF　ANNEALING　ON　MICROSTRUCTURE　OF　AROMATIC　LIQUID　CRYSTALLINE　COPOLYESTERS

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Chinese Chemical Letters 1996年第1期7卷 73-74页

作者： Wang, Y Wu, dc Li, RX SICHUAN UNION UNIV COLL TEXTCHENGDU 610065PEOPLES R CHINA

The effects of thermal treatment on microstructure of the Polyesters were studied. Annealing below Tc-n, physical diffusion PrOCesses dominate to yield an increasing crystallinity along with increased molecular weight transesterification reactions are limited to the end groups and the microstructure had not changed Annealing near Tc-n, chemical processes dominate and simultaneously make the microdomains ordered more perfectly. Analysis by 13C NMR Proved that interchain transesterification had occurred.

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Synthesis and Properties of Cerium Oxide Nanometer Powders by Pyrolysis of Amorphous Citrate

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Journal of Materials Science & Technology 1997年第2期13卷 113-116页

作者： Dong, XT Hong, GY Yu, dc Yu, DS CHINESE ACAD SCI CHANGCHUN INST APPL CHEMCHANGCHUN 130022PEOPLES R CHINA

CeO2 nanometer powders of different sizes were prepared at low temperature by pyrolysis of amorphous citrate. XRD patterns show that CeO2 is cubic in structure, space group O-h(5)-F-M3M. TEM indicates that the prepared CeO2 is spherical in shape, and the particle size distribution is in narrow range. It was found that calcination temperature is a more important factor affecting the crystallite size of CeO2 than calcining time, the smaller the particle, the bigger the crystal lattice distortion, the worse the crystal growth. Solubility test of CeO2 in nitric acid reveals that the surface activity of CeO2 decreases with the increasing particle sizes. IR spectra analysis shows that the absorption of Ce-O bond is shifted to higher energy with the decrease of CeO2 particle sizes.

关键词： Cerium compounds

无动脉粥样硬化性心血管疾病的糖尿病成人患者预测和预防心力衰竭风险的最佳筛查方法:汇总队列分析

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中华高血压杂志 2024年第1期32卷 7-7页

作者： Patel KV Segar MW Klonoff dc Khan MS Usman MS Lam CSP Verma S.DeFlilippis AP Nasir K Bakker SJL Westenbrink BD Dullaart RPF Butler J Vaduganathan M Pandey A 袁源(译) 郑武洪(审校) 不详

尚无最佳筛查方法识别发展为心力衰竭的高风险糖尿病个体,以制定预防治疗措施,特别是对于未患动脉粥样硬化性心血管疾病(atherosclerotic cardiovascular disease,ASCVD)的糖尿病个体。方法:研究纳入7项社区队列、基线时患有糖尿病但未... 详细信息

尚无最佳筛查方法识别发展为心力衰竭的高风险糖尿病个体,以制定预防治疗措施,特别是对于未患动脉粥样硬化性心血管疾病(atherosclerotic cardiovascular disease,ASCVD)的糖尿病个体。方法:研究纳入7项社区队列、基线时患有糖尿病但未患心力衰竭的成年人。

关键词：动脉粥样硬化性心血管疾病筛查方法成人患者预防治疗措施队列分析心力衰竭糖尿病高风险

Synthesis of Novel Molecular Receptors from Estradiol Dimer

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Chinese Chemical Letters 1997年第6期8卷 483-486页

作者： Li, DH Shi, dc Chen, SH Zhao, HM SICHUAN UNIV FAC SCIDEPT CHEMCHENGDU 610064PEOPLES R CHINA

A novel type of estrogen-based receptor has been synthesized. These receptor compounds 3a-d have been characterized by mass spectra, H-1 NMR spectra, IR spectra and elemental analyses.

关键词： ACID

Role of Alloying Elements P, Cu in Liquid Phase Sintering of Short Cast Iron Fiber

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Journal of Materials Science & Technology 1995年第2期11卷 122-126页

作者： YU, DL HE, JL TIAN, YJ CHEN, SZ LI, dc Hanshan Univ Qinhuangdao China

The effects of alloying elements P and Cu on the sintering process and mechanical properties of short cast iron fiber compact have been studied. The experimental results show that the sintering can be enhanced obviously by addition of phosphorus. The radial crush strength of sintered compacts increases with P content up to 0.15%, but when P content is over 0.15%, eutectics formed at the interfaces of fibers cause the decrease in strength and quasi-cleavage fracture of the sintered compact. Addition of Cu could not only reduce the volume shrinkage effectively, but also increase the strength and hardness of the sintered compact.

关键词： Fibers