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Cold-state spout-fluidizing characteristics of high-carbon ferromanganese powders

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International Journal of Minerals,Metallurgy and Materials 2011年第6期18卷 741-747页

作者： jin chen Wen-li Shi jing Zhao Wan-ming Lin Ke Liu College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China Xiangtan Science and Technology Co. Ltd. Xiangtan 411100 China

The spout-fluidizing characteristics of high-carbon ferromanganese powders with different sizes and masses were studied via a plexiglass spout-fluidized bed with an inner diameter of 30 mm and a height of 1000 *** relationships between bed voidage and such parameters as bed height,particle size,fluidizing air velocity,and air flow were *** results show that the powder material with high density can be fluidized in the spout-fluidized bed where the particle size is a key factor influencing the quality of fluidization.

关键词： ferromanganese powders fluidity density fluidized beds

Microwave-assisted regeneration of hypercrosslinked polymeric adsorbent saturated with nitrophenols

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Journal of Environmental Sciences 2006年第4期18卷 765-770页

作者： HAN Yong-zhong JIANG Li-yu chen jin-long ZHANG Quan-xing National Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China

Thermal regeneration ofhypercrosslinked polymeric adsorbent （HPA） was performed at 67℃. Experiments were carried out using a multimode microwave oven operating at 2450 MHz and a thermostatic water bath so as to compare the effect of the different heating mechanisms on the regeneration efficiency of the HPA saturated with nitrophenols. The temperature rise action of the heterogeneous regeneration system under microwave irradiation was described. Additionally, a complete structure and chemical characterization of the regenerated HPA was also carried out in order to study the influence of the subsequent regeneration cycles on the structure and the adsorption capacities of the adsorbents. Structure characterization of the regenerated HPA was accomplished by means of the analysis of FTIR spectra.

关键词： polymeric adsorbent microwave irradiation adsorption structure

Long-Term Prognosis of Different Reperfusion Strategies for ST-Segment Elevation Myocardial Infarction in Chinese County-Level Hospitals:Insight from China Acute Myocardial Infarction Registry

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Biomedical and Environmental Sciences 2023年第9期36卷 826-836页

作者： WU Chao ZHANG Qiong Yu LI Ling ZHANG Xu Xia CAI Yong chen YANG jin Gang XU Hai Yan ZHAO Yan Yan WANG Yang LI Wei jin chen GAO Xiao jin YANG Yue jin QIAO Shu Bin Coronary Heart Disease Center Department of CardiologyState Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Hypertension Center Department of CardiologyState Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Medical Research&Biometrics Center State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Department of Cardiology Tonghua Central HospitalTonghua 134000JilinChina Department of Cardiology The First Hospital of SuihuaSuihua 152054HeilongjiangChina

Objective To evaluate the long-term prognosis of patients with ST-segment elevation myocardial infarction(STEMI)treated with different reperfusion strategies in Chinese county-level hospitals Methods A total of 2,514 patients with STEMI from 32 hospitals participated in the China Acute Myocardial Infarction registry between January 2013 and September *** success of fibrinolysis was assessed according to indirect measures of vascular *** primary outcome was 2-year *** Reperfusion therapy was used in 1,080 patients(42.9%):fibrinolysis(n=664,61.5%)and primary percutaneous coronary intervention(PCI)(n=416,38.5%).The most common reason for missing reperfusion therapy was a prehospital delay>12 h(43%).Fibrinolysis[14.5%,hazard ratio(HR):0.59,95%confidence interval(CI)0.44–0.80]and primary PCI(6.8%,HR=0.32,95%CI:0.22–0.48)were associated with lower 2-year mortality than those with no reperfusion(28.5%).Among fibrinolysistreated patients,510(76.8%)achieved successful clinical reperfusion;only 17.0%of those with failed fibrinolysis underwent rescue *** was no difference in 2-year mortality between successful fibrinolysis and primary PCI(8.8%vs.6.8%,HR=1.53,95%CI:0.85–2.73).Failed fibrinolysis predicted a similar mortality(33.1%)to no reperfusion(33.1%vs.28.5%,HR=1.30,95%CI:0.93–1.81).Conclusion In Chinese county-level hospitals,only approximately 2/5 of patients with STEMI underwent reperfusion therapy,largely due to prehospital *** 30%of patients with failed fibrinolysis and no reperfusion therapy did not survive at 2 *** improvement initiatives are warranted,especially in public health education and fast referral for mechanical revascularization in cases of failed fibrinolysis.

关键词： Acute myocardial infarction Reperfusion therapy Rural Outcome

Highly efficient room temperature phosphorescent liquid crystalline polymer optical waveguides for advanced optoelectronics

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Science China Chemistry 2024年第10期67卷 3450-3457页

作者： Jie Li Yan Guan Wei Xia jin-Kang chen Jiang Huang Yi chen Qi Lin Er-Qiang chen He-Lou Xie Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education and Key Laboratory of Advanced Functional Polymer Materials of CollegesUniversities of Hunan Province and College of ChemistryXiangtan UniversityXiangtan 411105China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Active organic optical waveguide materials(OOWMs)incorporating room temperature phosphorescence(RTP)hold significant promise for diverse applications in photonic and optoelectronic *** this potential,realizing active RTP optical waveguides with large-sized ordered structures and minimal light loss remains a formidable *** address this issue,we present a groundbreaking thermoplastic active OOWM with low light loss,leveraging room temperature phosphorescent liquid crystalline polymer(LCP).This innovative material can be easily synthesized through the copolymerization of phosphorescent and liquid crystalline *** resulting RTP copolymer exhibits a nematic liquid crystal phase with a phosphorescence lifetime of approximately 0.15 ms and an afterglow duration of around 1 *** the excellent processability of LCP,we successfully produce meter-scale fibers via melt *** RTP LCP fibers,characterized by a high orientation of mesogens along the fiber axis,demonstrate superior light confinement and efficient light conduction compared to unoriented samples,resulting in a low optical loss coefficient of 0.13 dB/***,the thermal responsiveness of the RTP LCP optical waveguide enables its use as a photo *** pioneering work paves the way for the design of new OOWMs tailored for advanced photonics and optoelectronics devices.

关键词： room temperature phosphorescence liquid crystalline polymer active optical waveguide

Misdiagnosis of unroofed coronary sinus syndrome as an ostium primum atrial septal defect by echocardiography:A case report

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World Journal of Clinical Cases 2022年第5期10卷 1592-1597页

作者： jin-Ling chen Cai-Gui Yu Dai-Jiao Wang Hong-Bin chen Department of Echocardiography Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina Department of Pulmonary and Critical Care Medicine Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina

BACKGROUND Unroofed coronary sinus syndrome(UCSS)is a rare congenital heart disease,which has variable morphologic features and is strongly associated with persistent left superior vena cava(PLSVC).However,it is often difficult to visualize the left-to-right shunt pathway through the CS by transthoracic echocardiography(TTE).CASE SUMMARY A 37-year-old female was admitted to the hepatological surgery department of a hospital with complaint of subxiphoid pain that had started 1 wk *** examination revealed a grade 3/6 systolic murmur at the left margin of the sternum,between the 2nd and 3rd intercostal *** patient underwent echocardiography and was diagnosed with ostium primum atrial septal defect(ASD);thus,she was subsequently transferred to the cardiovascular surgery department.A second TTE evaluation before surgery showed type IV UCSS with secundum ***-heart contrast echocardiography(RHCE)showed that the right atrium and right ventricle were immediately filled with microbubbles,but no microbubble was observed in the ***,negative filling was observed at the right atrium orifice of the CS and right atrium side of the secundum atrial *** identified UCSS combined with secundum ASD but without PLSVC in this *** This rare case of UCSS highlights the value of TTE combined with RHCE in confirming UCSS with ASD or PLSVC.

关键词： Congenital heart disease Coronary sinus Atrial septal defect Persistent left superior vena cava Echocardiography Right heart contrast echocardiography Case report

Increased CAP37 Expression in Stable Chronic Obstructive Pulmonary Disease

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Current Medical Science 2022年第5期42卷 949-957页

作者： jin-qing chen Yi-fei DUAN Jian-miao WANG Department of Respiratory and Critical Care Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective Cationic antimicrobial protein of 37 kDa(CAP37),a neutrophil-derived protein originally identified for its antimicrobial activity,is now known to have many regulatory effects on host ***,its role in the pathogenesis of chronic obstructive pulmonary disease(COPD)has not been *** therefore investigated the expression of CAP37 in COPD and its effects on airway structural cells,including bronchial epithelial cells,smooth muscle cells,and *** CAP37 was detected in the lung tissue,sputum,and plasma of COPD patients and the control subjects,as well as in the neutrophils stimulated by cigarette smoke extract(CSE).BEAS-2B cells,human bronchial smooth muscle cells(HBSMCs),and MRC-5 cells were treated with CAP37 or an anti-CAP37 antibody plus ***(IL)-6 and IL-8 were detected in the BEAS-2B *** cell proliferation was analyzed in the *** were also detected in the MRC-5 *** The expression of CAP37 was increased in the lung tissue and sputum supernatant of the COPD patients compared with the control *** sputum supernatant CAP37 levels were inversely correlated with the forced expiratory volume in the first second percentage predicted in ***37 was induced by CSE stimulation in the peripheral blood neutrophils from healthy ***37 induced expression of IL-6 and IL-8 in BEAS-2B cells,and collagen expression of lung fibroblasts(MRC-5 cells).However,CAP37 did not significantly alter the proliferation of the *** Our findings indicated that neutrophil-derived CAP37 may be involved in airway inflammation and fibrosis in COPD via affecting the bronchial epithelial cells,and fibroblasts,thus suggesting a possible role of CAP37 in the development and progression of COPD.

关键词： cationic antimicrobial protein of 37 kDa chronic obstructive pulmonary disease fibrosis inflammation neutrophil

A Visualization Analysis of Medical and Prevention Fusion Research in China via CiteSpace

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China CDC weekly 2023年第23期5卷 519-524,I0001,I0002页

作者： chen jin Sijing Tu Yu Qian Xiaoyu chen Zhiyi Peng Xiaohe Wang School of Public Health Hangzhou Normal UniversityHangzhou CityZhejiang ProvinceChina School of Public Health and Management Guangxi University of Chinese MedicineNanning CityGuangxi Zhuang Autonomous RegionChina

Since the 1990s,the acceleration of population aging has led to an increased prevalence of chronic diseases and enhanced public health *** countries have proposed healthcare reforms,with a focus on creating an“integrated care”model that aims to improve the quality of medical services and reduce costs(1–2).In 2008,the World Health Organization(WHO)put forward the concept of Integrated Delivery Systems(IDS),advocating for continuous,timely and integrated medical services.

关键词： services CiteSpace acceleration

Experimental investigation on using CO_(2)/H_(2)O emulsion with high water cut in enhanced oil recovery

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Petroleum Science 2024年第2期21卷 974-986页

作者： Xi-Dao Wu Peng Xiao Bei Liu Guang-jin chen Jian-Hua Pang State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China Ocean Intelligence Technology Center Shenzhen Institute of Guangdong Ocean UniversityShenzhen518120GuangdongChina

CO_(2) emulsions used for EOR have received a lot of interest because of its good performance on CO_(2)mobility ***,most of them have been focusing on the high quality CO_(2) emulsion(high CO_(2) fraction),while CO_(2) emulsion with high water cut has been rarely *** this paper,we carried out a comprehensive experimental study of using high water cut CO_(2)/H_(2)O emulsion for enhancing oil ***,a nonionic surfactant,alkyl glycosides(APG),was selected to stabilize CO_(2)/H_(2)O emulsion,and the corresponding morphology and stability were evaluated with a transparent PVT ***,plugging capacity and apparent viscosity of CO_(2)/H_(2)O emulsion were measured systematically by a sand pack displacement apparatus connected with a 1.95-m long capillary ***,a high water cut(40 vol%) CO_(2)/H_(2)O emulsion was selected for flooding experiments in a long sand pack and a core sample,and the oil recovery,the rate of oil recovery,and the pressure gradients were *** results indicated that APG had a good performance on emulsifying and stabilizing CO_(2) *** inversion from H_(2)O/CO_(2) emulsion to CO_(2)/H_(2)O emulsion with the increase in water cut was ***_(2)/H_(2)O emulsions with lower water cuts presented higher apparent viscosity,while the optimal plugging capacity of CO_(2)/H_(2)O emulsion occurred at a certain water ***,the displacement using CO_(2)/H_(2)O emulsion provided 18.98% and 13.36% additional oil recovery than that using pure CO_(2) in long sand pack and core tests,*** work may provide guidelines for EOR using CO_(2) emulsions with high water cut.

关键词： CO_(2)/H_(2)O emulsion High water cut CO_(2) mobility control Enhanced oil recovery

Temperature Rise Characteristics of Carbon-Containing Chromite Ore Fines in Microwave Field

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Journal of Iron and Steel Research International 2008年第1期15卷 1-5页

作者： LI Ning chen jin YAN Hong FENG Xiu-mei CUI Hui-jun LIU jin-ying College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China No. 12 Research Institute China Electronics Technology Group Corporation Beijing 100016 China

To avoid the nonuniform phenomena of heat and mass transfer of metallurgical powdery materials caused by conventional heating method,the temperature rise characteristics of carbon-containing chromite ore fines in the microwave field were investigated using microwave heating in a microwave metallurgical *** experimental results show that the carbon-containing chromite ore fines have better temperature rise characteristics in the microwave field at a frequency of 2.45 *** heated in the microwave field of 10 kW,the temperature of 1 kg carbon-containing chromite ore fines rose up to 1 100 ℃ in 7 min,at a temperature rise rate of 157.1（℃·min-1·kg-1）,whereas the temperature of 1 kg carbon-containing magnetite ore fines rose only up to 1 000 ℃ in 10 min,at a temperature rise rate of 100（℃·min-1·kg-1）.With increasing carbon-fitting ratios and by adding calcic lime,their heating effects changed regularly.

关键词： carbon-containing chromite ore fine carbon-containing magnetite ore fine microwave fieldl temperature rise characteristics