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Rare occurrence of simultaneous coronary artery perforation and intracoronary thrombus formation following angioplasty

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Journal of Geriatric Cardiology 2013年第2期10卷 198-201页

作者： Su-yan Bian Liu-Fa duan The Second Department of Geriatric Cardiology Chinese PLA General Hospital Beijing 100853 China

Both coronary artery perforation and intracoronary thrombus formation are life-threatening complications of percutaneous coronary interventions, which rarely occur simultaneously during *** herein report a case of stent-related, left circumflex artery perforation, and subsequently acute left main artery thrombosis after the leakage was embolized with 7 microcoils. Intracoronary thromboectomy and systemic anticoagulant therapy were carefully used with good results. This case also represents some of our uncertainties regarding the best management of the patient.

关键词： Cardiac tamponade Coronary vessels Percutaneous coronary interventions Perforation Thrombosis

Diffractive Scattering Factorization from J/ψ and γ Associated Production in HERA ep Collisions

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Communications in Theoretical Physics 2002年第11期37卷 583-586页

作者： yan Zhan-Yuan duan Chun-Gui Department of Physics North China Electric Power University Baoding 071003 China Department of Physics Hebei Teachers'' University Shijiazhuang 050016 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China

Using three sets of Pomeron structure functions, the cross sections of J/ψ and γ associated productionvia resolved photon and proton diffractive scatting in ep collision are investigated. It is found that the cross sectionscalculated with various gluon distribution functions of Pomeron are different. The discrepancy is about 1.8 times fordifferential cross sections and 1.7 times for total cross sections. The experimental studies of the process could give valuableinsight in the diffractive production mechanism and test the color-octet mechanism for heavy quarkonium production ina new environment.

关键词：高能物理强子-强子碰撞 J/ψ介子

Surface Distribution of Topological Defects on Axisymmetric

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Communications in Theoretical Physics 2006年第2X期46卷 319-322页

作者： SI Tie-yan duan Yi-Shi Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China

We propose a general method of deterrnining the distribution of topological defects on axisymmetric surface, and study the distribution of topological defects on biconcave-discoid surface, which is the geometric configuration of red blood cell. There are three most possible cases of the distribution of the topological defects on the biconcave surface： four defects charged with 1/2, two defects charged with ＋1, or one defect charged with 2. For the four defect charged with 1/2, they sit at the vertices of a square imbedded in the equator of biconcave surface.

关键词： topolotical defects membrane axisymmetric surface

Hybrid scheme for three-cell multi-user MIMO cellular networks

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The Journal of China Universities of Posts and Telecommunications 2014年第5期21卷 37-42页

作者： MA yan-jun School of Communication Engineering Xi'an University of Science and Technology

Orthogonal schemes are usually adopted for cell-edge users in a cellular network, where the spectrum is poorly utilized. A new interference alignment （IA） based space-division hybrid （IA-SDH） scheme is proposed by joint design transmit precoding matrices and beamforming matrices for a three-cell constant cellular network, where users at cell-center work with a conventional scheme while users at cell-edge utilize an IA scheme. Therefore, the cell-edge users suffer no interference and cell-center users are only affected by negligible inter-cell interference. Analysis simulation shows that more users can be served simultaneously than that of a conventional scheme in certain user distributions.

关键词： iterference alignment degree of freedom interference channel

Decompression of the small bowel by endoscopic long-tube placement

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World Journal of Gastroenterology 2012年第15期18卷 1822-1826页

作者： Shi-Bin Guo Zhi-jun duan Department of Gastroenterological Endoscopy the First Affiliated Hospital of Dalian Medical University Dalian 116001 Liaoning Province China Department of Gastroenterology the First Affiliated Hospital of Dalian Medical University Dalian 116001 Liaoning Province China

AIM:To investigate and compare the decompression effect on small bowel obstruction of a long tube inserted using either endoscopic or fluoroscopic ***:Seventy-eight patients with small bowel obstruction requiring decompression were enrolled in the study and divided into two *** of a long tube was guided by fluoroscopy in one group and by endoscopy in the *** duration of the procedure and the success rate for each group were ***:A statistically significant difference in the mean duration of the procedure was found between the fluoroscopic group(32.6±14.6 min)and the endoscopic group(16.5±7.8 min)among the cases classified as successful(P<0.05).The success rate was significantly different between the groups:88.6%in the fluoroscopic group and 100%in the endoscopic group(P <0.05).CONCLUSION:For patients with adhesive small bowel obstruction,long-tube decompression is recommended and long-tube insertion by endoscopy was superior to fluoroscopic placement.

关键词： Long-tube insertion Small bowel obstruction Decompression Gastroscope Fluoroscopic guidance

《国民说部总目之〈国民健康集〉》公共卫生叙事研究

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黄冈师范学院学报 2025年第1期45卷 91-95页

作者：梁青艳段卫东广州理工学院人文与教育学院广东广州510540 贵州民族大学传媒学院贵州贵阳550025

以《国民说部总目之〈国民健康集〉》这一作为民国时期政府主导下的社会类书籍为研究对象,从叙事维度出发,深入剖析其内在书写,深刻揭示民国时期公共卫生宣传的内在逻辑与宣传效果。研究以政府主导下的深入民众日常公共卫生常识的宣传... 详细信息

以《国民说部总目之〈国民健康集〉》这一作为民国时期政府主导下的社会类书籍为研究对象,从叙事维度出发,深入剖析其内在书写,深刻揭示民国时期公共卫生宣传的内在逻辑与宣传效果。研究以政府主导下的深入民众日常公共卫生常识的宣传工作为导向,有效还原民国时期公共卫生建构真相,为近代中国公共卫生史的研究提供新的理论视角与方法路径。

关键词：民国时期《国民说部总目之〈国民健康集〉》公共卫生叙事

Moderate drought alleviates the damage to grain quality at high temperatures by improving the starch synthesis of inferior grains in japonica rice

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Journal of Integrative Agriculture 2022年第10期21卷 3094-3101页

作者： TONG Hui duan Hua WANG Sheng-jun SU Jing-ping SUN Yue LIU yan-qing TANG Liang LIU Xue-jun CHEN Wen-fu Rice Research Institute Shenyang Agricultural UniversityShenyang 110866P.R.China Tianjin Key Laboratory of Crop Genetics and Breeding Tianjin Crop Research InstituteTianjin 300384P.R.China

In agricultural production,temperature and moisture are important factors affecting grain yield and *** moderate drought at the grain-filling stage can effectively alleviate the damage caused by high temperature,the specific regulatory mechanism driving the effect of moderate drought at the high temperature on starch synthesis is still *** explore the effects and mechanisms of high temperature and moderate drought on rice starch synthesis at the grainfilling stage,the activities of enzymes and expression levels of the genes involved in starch synthesis under four different treatments involving high temperature and/or water stress(CK,HT,WS,and HT+WS)were investigated in this *** starch synthesis of a japonica inbred rice was measured under the four treatments during the grain *** results show that the effects of high temperature and moderate drought on grain filling mainly occur in the inferior grains of *** the regulation of enzymes involved in starch synthesis and the expression levels of their main genes,the synthesis of rice starch can be ***,the high temperature and moderate drought were antagonistic,and moderate drought can alleviate the damage to grain quality at a high temperature by improving the starch synthesis of inferior grains in japonica *** study provides a basis for stress-resistance cultivation and breeding strategies of rice with high temperature tolerance.

关键词： high temperature moderate drought antagonism starch synthesis japonica rice

Reaction Mechanism of H2-Assisted C3H6-SCR over Ag-CexZr Catalyst as Investigated by In situ FTIR

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Chemical Research in Chinese Universities 2020年第5期36卷 885-893页

作者： duan jun ZHAO Ling GAO Shengjun ZHANG Yu School of Ecology and Environment Inner Mongolia UniversityHohhot 010021P.R.China

A series of silver-doped cerium zirconium oxide(Ag-CevZr)samples was synthesized successfully for selective catalytic reduction of nitric oxide(NO)with hydrogen and propene(H2/C3H6-SCR)under excess oxygen *** catalytic activity test proved that Ag-Ce0.4Zr exhibited the best C3H6-SCR ***(H2)significantly enlianced NO conversion and widened the temperature ***-technology characterizations were conducted to ascertain the properties of fabricated catalysts including X-ray diflraction(XRD),Fourier transform infrared spectrometry(FTIR),scanning electron microscopy(SEM)and H2 temperature programmed reduction(H2-TPR).In situ FTIR results demonstrated that various types of nitrates and chelating nitrite were generated on Ag-CexZr after introduction of ***,adding H2 could increase the concentration of bidentate nitrate and chelated bidentate nitrate dramatically,especially for Ce0.4Zr *** reaction between pre-adsorbing NO and C3H/C3H6+H2 illuminated that the most active intermediate was chelating nitrite,which was promoted significantly by H2 ***,adding H2 improved the formation of organo-nitro(R-N02),which was the key intennediate in *** reaction mechanism over Ag-CexZr catalysts was proposed at 200℃ as follows:nitric oxide(NO)+pr opene(C 3H6)+hy dr ogen(H2)+oxy gen(O2)→chelating nitrite (N O2-)+acry late-type species(CxHyOz)→organo-nitro(R-NO2)→isocyanate(-NCO)+cyanide(—CN)→nitrogen(N2).

关键词： NO3-H2/CH-SCR In situ Fourier transform infrared(FTIR)spectrometry

Zircon Trace Element Constraints on U-Pb Dating:A Case Study of the Huayuangong A-type Granite in the Lower yangtze Region,Eastern China

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1171-1182页

作者： QI Fei yan jun School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

For magmatic rocks,it is often found that zircon 206 Pb/238 U and 207 Pb/235 U ratios continuously plot on the concordia line with a relatively large age span for the same sample,which gives rise to large dating errors or even unrealistic dating *** the trace element concentrations of zircon can reflect its equilibrated magma characteristics,they can be used to determine whether all the analytical spots on the zircons selected to calculate the weighted mean age are cogenetic and formed in a single magma *** work utilizes the results of zircon trace element concentrations and U-Pb isotopic analyses to explore the screening of reasonable U-Pb ages,which can be used to determine a more accurate intrusion crystallization *** late Mesozoic Huayuangong granitic pluton complex,which is located in the Lower yangtze region,eastern China,was selected for a case *** Huayuangong pluton comprises the central intrusion and the marginal *** samples from the marginal intrusion yielded consistent zircon weighted mean 206 Pb/238 U ages of 124.6±2.0 Ma and 125.9±1.6 *** analytical spots also exhibit Zr/Hf and Th/U ratios concordant with the evolution of a single magma,from which the dated zircons ***,for the central intrusion,the analytical spots on zircons from two samples all show a continuous distribution on the concordia line with a relatively large age *** each sample from the central intrusion,the zircon Zr/Hf ratios do not conform to a single magma evolutionary trend,but rather can be divided into two *** propose that zircon Zr/Hf ratios can provide a new constraint on U-Pb zircon dating and zircon Th/U ratios can also be used as a supplementary indicator to constrain zircon dating and determine the origins of the zircons and whether magma mixing has *** screening zircon analytical spots using these two indicators,the two samples from the central intrusion of the Huayuangong pluton produce results of 1

关键词： U-Pb zircon dating zircon Zr/Hf ratios zircon Th/U ratios magma mixing trace elements yangtze