检索结果-南通市图书馆

Journal of Geriatric Cardiology 2016年第9期13卷 768-775页

作者： Ying ZHOU Hua-Wei ZHANG Feng tian Jin-Song CHEN tian-wen HAN Ya-Hang TAN Jia ZHOU Tao ZHANG Jing JING Yun-Dai CHEN Department of Cardiology Chinese PLA General Hospital Beijing China VIP Medical Service Department Beijing SHIJITAN Hospital Belling China Department of Cardiology Chinese PLA 175 Hospital Fujian China School of Medicine Nankai University Tianjin China Department of Cardiology Tianjin Chest Hospital Tianjin China

Background Epicardial adipose tissue （EAT） is significantly associated with the formation and composition of coronary atherosclerotic plaque, cardiac events and the clinical prognosis of coronary heart disease. But, whether increased EAT deposition may affect the incidence of in-stent restenosis （ISR） is currently unclear. This study used coronary computed tomography angiography （CCTA） as a mean to investigate whether increased EAT volume was associated with ISR. Methods A total of 364 patients who underwent 64-slice CCTA examination for the evaluation of suspected coronary artery disease, and subsequently underwent percutaneous coronary intervention （PCI） for the first time, and then accepted coronary angiography （CA） follow-up for ISR examination in one year, were retrospectively included in this study. EAT volume was measured by CCTA examination. CA follow-up was obtained between 9 and 15 months. ISR was defined as 〉 50% kuninal diameter narrowing of the stent segment or peri-stent segment. EAT volume was compared between patients with and without ISR and additional well-known predictors of ISR were compared. Results EAT volume was significantly increased in patients with ISR compared with those without ISR （154.5 ± 74.6 mL vs. 131.0 ± 52.2 mL, P 〈 0.001）. The relation between ISR and EAT volume remained significant after adjustment for conventional cardiovascular risk factors and angiographic parameters. Conclusions EAT volume was related with ISR and may provide additional information for future ISR.

关键词： Computed tomography Drug-eluting stents Epicardial adipose tissue In-stem restenosis

Profiling and identification of aqueous extract of Cordyceps sinensis by ultra-high performance liquid chromatography tandem quadrupole-orbitrap mass spectrometry

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2019年第8期17卷 631-640页

作者： YAO Chang-Liang QIAN Zheng-Ming tian wen-Shuai XU Xiao-Qian YAN Yu SHEN Yao LU Song-Mao LI wen-Jia GUO De-An R&D Department GenChim Testing (Shanghai) Co. Ltd. Shanghai 200131 China Key Laboratory of State Administration of Traditional Chinese Medicine Sunshine Lake Pharma Co. Ltd. Guangdong 523850 China Shanghai Research Center for Modernization of Traditional Chinese Medicine National Engineering Laboratory for TCM Standardization Technology Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China

Characterization of aqueous extract in traditional Chinese medicine(TCM) is challenging due to the poor retention of the analytes on conventional C18 columns. This study presents a systematic characterization method based on a rapid chromatographic separation(8 min) on a polar-modified C18(Waters Cortecs T3) column of aqueous extract of Cordyceps sinensis. UHPLC-HRMS method was used to profile components in both untargeted and targeted manners by full MS/PIL/dd-MS2 acquisition approach. The components were identified or tentatively identified by reference standards comparison, fragmentation rules elucidation and available databases search. A total of 91 components, including 10 nucleobases, 20 nucleosides, 39 dipeptides, 18 amino acids and derivatives and 4 other components, were characterized from the aqueous extract of C. sinensis. And this was the first time to systematically report the presence of nucleosides and dipeptides in C. sinensis, especially for modified nucleosides. The chemical basis inquiry of this work would be beneficial to mechanism exploration and quality control of C. sinensis and related products. Meanwhile, this work also provided an effective solution for characterization of aqueous extract in TCM.

关键词： Aqueous extract Cordyceps sinensis Dipeptides Nucleosides

Photoluminescence and Electroluminescence from Plasma Ploymerized Naphthalene Films

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1996年第10期13卷 794-796页

作者： ZHANG Hai-feng MA Yu-guang tian wen-jing SHEN Jia-cong TANG Jian-guo LIU Shi-yong Key Laboratory of Molecular Spectra and Structures Jilin UniversityChangchun 130023 National Labaratory of Integrated Optical Electronics Jilin UniversityChangchun 130023

A polymer thin film electroluminescence (EL) device has been prepared by using plasma polymerization technique. Its basic structure consists of an emitting layer of plasma polymerized naphthalene (PPN) which is sandwiched between two metal electrodes. A uniform blue emission is observed under 8-20 V. Some electrical and optical properties of the device are described. The possible explanations for the blue EL from PPN are discussed.

关键词： technique. sandwich polymerization

Unaxisymmetric Non-Fused Electron Acceptors for Efficient Polymer Solar Cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第8期40卷 944-950,I0009页

作者： Si-Ya Liu Di Wang tian-Jiao wen Guan-Qing Zhou Hai-Ming Zhu Hong-Zheng Chen Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of Chemistry Zhejiang UniversityHangzhou310027China

To develop photovoltaics embracing the both features of high performance and low cost has drawn attentions of researchers,yet representing the significant *** this work,two non-fused ring acceptors(NFRAs),namely p-PTIC4Cl and t-PTIC4Cl,were developed via a short synthetic *** tethering unaxisymmetric aromatic chains to thienyl bridge of NFRAs,we revealed that the tuning of aromatic chains allows modulating the self-assembly and stacking of NFRAs in solid,hence influencing their optoelectronic and photovoltaic *** results,p-PTIC4Cl,consisting of 3-hexylbenzene with large axial angle to backbone,can achieve superior PCE of 11.30%than that of t-PTIC4Cl with 2-hexylthiophene chains(PCE of 6.49%),when pairing with polymer donor *** of the only subtle structural difference,the p-PTIC4Cl based blend films possess better exciton dissociation and charge transfer rates,as well as photostability,to those of t-PTIC4Cl based blends.

关键词： Polymer solar cells Non-fused ring acceptor Unaxisymmetric aromatic chains Photostability

Synchronous splenectomy and hepatectomy for patients with hepatocellular carcinoma and hypersplenism:A casecontrol study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第8期21卷 2358-2366页

作者： Xiao-Yun Zhang Chuan Li tian-Fu wen Lu-Nan Yan Bo Li Jia-Yin Yang wen-Tao Wang Li Jiang Department of Liver Surgery and Liver Transplantation Centre West China Hospital of Sichuan University

AIM:To investigate whether the use of synchronoushepatectomy and splenectomy(HS)is more effective than hepatectomy alone(HA)for patients with hepatocellular carcinoma(HCC)and ***:From January 2007 to March 2013,84consecutive patients with HCC and hypersplenism who underwent synchronous hepatectomy and splenectomy in our center were compared with 84 well-matched patients from a pool of 268 patients who underwent hepatectomy *** short-term and longterm outcomes of the two groups were analyzed and ***:The mean time to recurrence was 21.11±12.04 mo in the HS group and 11.23±8.73 mo in the HA group,and these values were significantly different(P=0.001).The 1-,3-,5-,and 7-year disease-free survival rates for the patients in the HS group and the HA group were 86.7%,70.9%,52.7%,and 45.9%and 88.1%,59.4%,43.3%,and 39.5%,respectively(P=0.008).Platelet and white blood cell counts in the HS group were significantly increased compared with the HA group one day,one week,one month and one year postoperatively(P<0.001).Splenectomy and micro-vascular invasion were significant independent prognostic factors for disease-free ***,tumor number,and recurrence were independent prognostic factors for overall ***:Synchronous hepatectomy and hepatectomy potentially improves disease-free survival rates and alleviates hypersplenism without increasing the surgical risks for patients with HCC and hypersplenism.

关键词： Hepatocellular carcinoma Hypersplenism Splenectomy

Measurements of the effective mass transfer areas for the gas–liquid rotating packed bed

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第3期55卷 13-19页

作者： wen tian Junyi Ji Hongjiao Li Changjun Liu Lei Song Kui Ma Siyang Tang Shan Zhong Hairong Yue Bin Liang Low-Carbon Technology and Chemical Reaction Engineering Laboratory School of Chemical EngineeringSichuan UniversityChengdu 610065China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610207China

Rotating packed bed(RPB) is one of the most effective gas–liquid mass transfer enhancement reactors, its effective specific mass transfer area(ae) is critical to understand the mass transfer process. By using the NaOH–CO_(2) chemical absorption method, the aevalues of three RPB reactors with different rotor sizes were measured under different operation conditions. The results showed that the high gravity factor and liquid flow rate were major affecting factors, while the gas flow rate exhibited minor *** radius of packing is the dominant equipment factor to affect aevalue. The results indicated that the contact area depends on the dispersion of the liquid phase, thus the centrifugal force of rotating packed bed greatly influenced the aevalue. Moreover, the measured ae/ap(effective specific mass transfer area/specific surface area of packing) values were fitted with dimensionless correlation formulas. The unified correlation formula with dimensionless bed size parameter can well predict the experimental data and the prediction errors were within 15%.

关键词： Gas-liquid Chemical absorption Mass transfer areas Rotating packed bed(RPB)

Inhibition of insulin fibrillation by amphiphilic sulfonatocalixarene

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第7期31卷 1873-1876页

作者： Hong Zhao Xiao-Hua Yang Yu-Chen Pan Han-wen tian Xin-Yue Hu Dong-Sheng Guo College of Chemistry Key Laboratory of Functional Polymer Materials(Ministry of Education)State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin 300071China Research Institute of Petroleum Engineering Sinopec.Beijing 100101China

Insulin fibrillation poses a variety of problems in biomedical and biotechnological applications of *** insulin fibrillation is highly on demand to address those *** herein demonstrate the capability of amphiphilic sulfonatocalixarene to inhibit insulin *** amphiphilic assembly of p-sulfonatocalix[4]arene tetra dodecyl ether exhibits much better efficiency on inhibiting insulin fibrillation,with respect to p-sulfonatocalix[4]arene and sodium dodecyl *** pronounced inhibition effect results from both the preorganized scaffold of calixarene and the amphiphilic assembly.

关键词： Supramolecular chemistry Calixarene Self-assembly Molecular recognition Insulin fibrillation

Influence of crack characteristics on the morphological development of Benggang and hydrological processes

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第7期20卷 1900-1910页

作者： LIU Wei-ping WANG Shu-han tian Si-wen OUYANG Guo-quan HU Li-na YUAN Zhi-jun School of Civil Engineering and Architecture Nanchang UniversityNanchang 330031China

Benggang is a special type of soil erosion,which widely distributes in the granite residual soil area of southern *** to the influence of local climate and topography,shallow cracks having different morphological characteristics are easily formed on the slope *** shallow cracks damage the surface structure of the slope and accelerate water infiltration,making it easier to cause severe soil and water ***,the mechanism of Benggang process is still unclear,especially for slopes with different shallow crack *** this study,granite residual soil was collected from Benngang erosion area in Yudu County,Jiangxi Province,southern *** experimental treatments with slope surface crack rates of 0%,5.23%,and 11.70%were *** monitoring of moisture content and soil temperature in the slope were carried out during rainfall,and the characteristics of preferential flow were monitored with different crack *** development and evolution process of Benggang with different crack rates were *** show that high surface crack rate of the shallow surface on the slope accelerated the development of shallow gully erosion,leading to premature occurrence of gully *** the shallow crack rate increased from 0%to 5.23%and 11.70%,the width-depth ratio of the rills at the slope bottom increased from 0.69 to 1.02 and 1.16,*** the same time,a correlation between moisture and temperature data was observed for the process of water-heat coupled *** upper soil temperature of slope decreased quickly due to preferential *** simultaneous monitoring of soil moisture and temperature can effectively track preferential flow and indicate the water *** data was a more sensitive indicator of the seepage paths of preferential flow compared to moisture data.

关键词： Granite residual soil Benggang Crack characteristics Preferential flow

Effect of Cooling Rate on Microstructure and Mechanical Properties of K465 Superalloy

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2009年第6期16卷 70-74页

作者： PEI Zhong-ye HAN Wei ZHAO Gang CHEN Xing-fu LI Jun-tao tian Yan-wen School of Material and Metallurgy Northeastern University Shenyang 110004 Liaoning China High Temperature Materials Research Division Central Iron and Steel Research Institute Beijing 100081 China

K465 superalloy, as a material for production of turbine nozzle, shows high mechanical properties as well as microstructure stability under critical and severe service conditions. The appropriate microstructure and strength of this alloy can be obtained by solid solution strengthening mechanism. Heat treatment parameters such as time and temperature of homogenization, partial solution and aging temperatures, and cooling rate from solid solution temperature affect the microstructure of the alloy. Among these parameters, cooling rate from solid solution temperature is the most effective. Therefore, the effect of cooling rate on microstructure and mechanical properties （tensile and stress properties） was investigated. For this purpose, three different cooling rates were applied to the cast K465 specimens subjected to solution treatment at 1 483 K for 4 h. Microstructures of the specimens then were studied using optical and electron microscopy. Also, tensile tests were performed at room temperature and stress rupture tests were performed under the condition of 1 248 K and 230 MPa. It was found that with increasing the cooling rate, the size of the γ＇ precipitates decreases and the mechanical properties of specimens increases. Also, it was found that the shape and volume fraction of primary γ＇ particles are largely influenced by the cooling rate after solution treatment at 1 483 K for 4 h.

关键词： cast superalloy solution heat treatment cooling rate microstructure mechanical property