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Reduction behavior of iron ore powder by high-volatile coal in thermogravimetric-gas chromatographic and kinetic analysis

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Journal of Iron and Steel Research(international) 2024年第1期31卷 92-107页

作者： Rui-meng Shi Qi-yuan Mi Bin Li Xiao Shi Chong Zou Jing Guo Han-jie Guo School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China international Engineering Consulting Corporation Beijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The reduction behavior of iron ore powder by high-volatile coal was investigated,and its kinetic mechanism was *** effect of volatiles in coal on the reduction reaction of iron ore was compared by utilizing a Xinjiang lignite with a high volatile content and its pyrolysis carbon produced by high-temperature pyrolysis to remove volatiles,serving as a *** mass loss and gas composition of the samples during the reduction process were detected using thermo-gravimetric analysis and gas chromatography,and the morphological changes of iron ore powder were observed through scanning electron *** kinetic parameters of the iron oxide reduction reaction were calculated by the Flynn-Ozawa-Wall method,and the kinetic mechanism of volatile participation in the iron oxide reduction reaction was determined through the Coats-Redfern *** results indicate that the coupling effect between the high-volatile coal pyrolysis and reduction reactions occurs during the second stage of the entire coupling process,which corresponds to the late stage of coal pyrolysis with a substantial release of H_(2)and *** volatiles in coal actively participated in the reduction reaction,reducing the initiation temperature of the reaction by around 200℃.The reduction of iron oxides by high-volatile coal was jointly promoted by the"hydrogen cycle"and"carbon cycle",resulting in a higher reduction extent and metallization rate at the end of the *** high-volatile coal was used as the reductant,the average activation energy for the entire process was 76.5 kJ/mol,a significant decrease compared to the employment of pyrolysis carbon without volatiles as the reductant(1167 kJ/mol).

关键词： Direct reduction High-volatile coal Volatile Kinetics Reduction mechanism

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Effect of uninterrupted dabigatran or rivaroxaban on achieving ideal activated clotting time to heparin response during catheter ablation in patients with atrial fibrillation

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Journal of Geriatric cardiology 2022年第8期19卷 565-574页

作者： Qian XIN Chuang ZHANG Yu-Jia WANG Jian LI Tao CHEN Shi-Xing LI Wei WANG Yu YANG Wen-Juan SONG Jin ZHOU Xiang-Min SHI department of cardiology the Sixth Medical CentreChinese PLA General HospitalBeijingChina department of Health service the Eighth Medical CentreChinese PLA General HospitalBeijingChina

BACKGROUND Uninterrupted use of oral anticoagulants before atrial fibrillation(AF)ablation can reduce the incidence of perioperative thromboembolic ***,the effect of new oral anticoagulants on activated clotting time(ACT)in respo-nse to heparin during AF ablation in Chinese populations remains *** aim of the present retrospective study was to investigate the value of ACTs in response to intraoperative heparin administration in patients using dabigatran or *** From January 2018 to December 2021,a total of 173 patients undergoing AF ablation were included in the study,in which 101 patients were treated with dabigatran,72 patients were treated with *** intraoperative ACT values were examined in both *** incidence of periprocedural complications was *** Initial heparin dosage(88±19 U/kg vs.78±27 U/kg,P<0.05),total heparin dosage(137±41 U/kg vs.106±52 U/kg,P<0.05)during the ablation procedure were higher in the dabigatran group than those in the rivaroxaban *** ACT(280±36 s vs.265±30 s,P<0.05),and the percentage of ACTs within the therapeutic range(250-350 s)(74%±26%vs.60%±29%,P<0.05)were significantly lower in the dabigatran group than those in the rivaroxaban group,particularly in male ***,the average time of achieving the target ACT(250-350 s)was also found longer in the dabigatran group(P<0.05)as compared with the rivaroxaban *** significant difference was found in the incidence of periprocedural complica-tions between the two *** The anticoagulant effect of uninterrupted rivaroxaban therapy appears to be more stable and efficient than dabigatran administration during catheter ablation in patients with AF.

关键词： patients heparin dosage

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Blocking the PD-1 signal transduction by occupying the phosphorylated ITSM recognition site of SHP-2

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Science China Life Sciences 2024年

作者： Wenjie Li Wenyi Mei Hewei Jiang Jie Wang Xiaoli Li Lina Quan Yanyan Diao Yanni Ma Sisi Fan Zhuwei Xie Mengdie Gong Huan Zhu Dewen Bi Feng Zhang Lei Ma Jian Zhang Yufeng Gao Aris Paschalidis Honghuang Lin Fangfang Liu Kangdong Liu Mingliang Ye Zhenjiang Zhao Yajun Duan Zhuo Chen Yufang Xu Weilie Xiao Shengce Tao Lili Zhu Honglin Li Innovation Center for AI and Drug Discovery East China Normal University Shanghai Key Laboratory of New Drug Design School of PharmacyEast China University of Science&Technology Shanghai Center for Systems Biomedicine Key Laboratory of Systems Biomedicine (Ministry of Education)Shanghai Jiao Tong University Lingang Laboratory Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of EducationYunnan Characteristic Plant Extraction LaboratoryYunnan Provincial Center for Research&Development of Natural ProductsState Key Laboratory for Conservation and Utilization of Bio-Resources in YunnanSchool of Pharmacy and School of Chemical Science and TechnologyYunnan University CAS Key Laboratory of Separation Sciences for Analytical Chemistry National Chromatographic R&A CenterDalian Institute of Chemical PhysicsChinese Academy of Sciences department of cardiology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of China department of Infectious Diseases The First Affiliated Hospital of Anhui Medical University department of Medicine University of Massachusetts Chan Medical School department of Pathophysiology School of Basic Medical SciencesAcademy of Medical ScienceCollege of MedicineZhengzhou University

Targeting the PD-1/PD-L1 axis with small-molecular inhibitors is a promising approach for immunotherapy. Here, we identify a natural pentacyclic triterpenoid, Pygenic Acid A(PA), as a PD-1 signaling inhibitor. PA exerts anti-tumor activity in hPD-1 knock-in C57BL/6 mice and enhances effector functions of T cells to promote immune responses by disrupting the PD-1 signaling transduction. Furthermore, we identify SHP-2 as the direct molecular target of PA for inhibiting the PD-1 signaling transduction. Subsequently, mechanistic studies suggest that PA binds to a new druggable site in the phosphorylated PD-1 ITSM recognition site of SHP-2, inhibiting the recruitment of SHP-2 by PD-1. Taken together, our findings demonstrate that PA has a potential application in cancer immunotherapy and occupying the phosphorylated ITSM recognition site of SHP-2 may serve as an alternative strategy to develop PD-1 signaling inhibitors. In addition, our success in target recognition provides a paradigm of target identification and confirmation for natural products.

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护士突发公共卫生事件应对能力与工作场所韧性的关系:一项横断面调查研究

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international Journal of Nursing Sciences 2024年第3期11卷 301-307,I0001页

作者：师文文邱晨张祎凡王毅欣桂莉 School of Nursing Navy Military Medical UniversityShanghaiChina department of Orthopedics Fourth Medical CenterChinese PLA General HospitalBeijingChina Basic medical School Navy Military Medical UniversityShanghaiChina

目的调查影响护士突发公共卫生事件应对能力的因素,并了解其与工作场所韧性之间的关系。方法从2022年1月18日至9月6日,使用问卷星对361名军队医院的护士进行了一项横断面研究。调查问卷包括个人基本信息,护士突发公共卫生事件应对能力... 详细信息

目的调查影响护士突发公共卫生事件应对能力的因素,并了解其与工作场所韧性之间的关系。方法从2022年1月18日至9月6日,使用问卷星对361名军队医院的护士进行了一项横断面研究。调查问卷包括个人基本信息,护士突发公共卫生事件应对能力问卷和工作场所韧性量表。对数据进行描述性统计和频率分析,进行单因素方差分析以确定不同组别之间的差异,进一步进行多因素回归分析,分析影响护士突发公共卫生事件应对能力的主要因素。结果护士突发公共卫生事件应对能力和工作场所韧性的得分分别为(4.01+0.76)分和(3.85+0.71)分,处于较高水平。护士的教育水平、工作年限、有无防疫参与经验是护士突发公共卫生事件应对能力的影响因素。此外,工作场所韧性水平与传染病应对能力之间存在正相关,其和工作年限解释了护士突发公共卫生事件应对能力的63.6%。结论需加强教育水平低、工作年限较短、没有防疫参与经验护士的培训,医院还应优先改善护士的工作场所适应性,通过针对性的干预提高其传染病预防、准备、急救和后续重症患者护理能力。

关键词：护士公共卫生韧性应对能力救援工作

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Meibomian glands segmentation in infrared images with limited annotation

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international Journal of Ophthalmology(English edition) 2024年第3期17卷 401-407页

作者： Jia-Wen Lin Ling-Jie Lin Feng Lu Tai-Chen Lai Jing Zou Lin-Ling Guo Zhi-Ming Lin Li Li College of Computer and Data Science Fuzhou UniversityFuzhou 350108Fujian ProvinceChina Fujian Provincial Key Laboratory of Networking Computing and Intelligent Information Processing Fuzhou UniversityFuzhou 350108Fujian ProvinceChina Shengli Clinical medical College of Fujian medical University Fuzhou 350001Fujian ProvinceChina department of Ophthalmology Fujian Provincial Hospital South BranchFujian Provincial HospitalFuzhou 350001Fujian ProvinceChina

●AIM:To investigate a pioneering framework for the segmentation of meibomian glands(MGs),using limited annotations to reduce the workload on ophthalmologists and enhance the efficiency of clinical diagnosis.●METHODS:Totally 203 infrared meibomian images from 138 patients with dry eye disease,accompanied by corresponding annotations,were gathered for the study.A rectified scribble-supervised gland segmentation(RSSGS)model,incorporating temporal ensemble prediction,uncertainty estimation,and a transformation equivariance constraint,was introduced to address constraints imposed by limited supervision information inherent in scribble *** viability and efficacy of the proposed model were assessed based on accuracy,intersection over union(IoU),and dice coefficient.●RESULTS:Using manual labels as the gold standard,RSSGS demonstrated outcomes with an accuracy of 93.54%,a dice coefficient of 78.02%,and an IoU of 64.18%.Notably,these performance metrics exceed the current weakly supervised state-of-the-art methods by 0.76%,2.06%,and 2.69%,***,despite achieving a substantial 80%reduction in annotation costs,it only lags behind fully annotated methods by 0.72%,1.51%,and 2.04%.●CONCLUSION:An innovative automatic segmentation model is developed for MGs in infrared eyelid images,using scribble annotation for *** model maintains an exceptionally high level of segmentation accuracy while substantially reducing training *** holds substantial utility for calculating clinical parameters,thereby greatly enhancing the diagnostic efficiency of ophthalmologists in evaluating meibomian gland dysfunction.

关键词： infrared meibomian glands images meibomian gland dysfunction meibomian glands segmentation weak supervision scribbled annotation

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Validation of the Meta-Analysis Global Group in Chronic Heart Failure risk score for the prediction of 1-year mortality in a Chinese cohort

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Chinese medical Journal 2022年第23期135卷 2829-2835页

作者： Duo Xu Yanjing Dong Bo Zhang Li Li Chenyang Jiang department of cardiology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiang 3100016China department of cardiology CHC International HospitalCixiZhejiang 315310China

Background: The Meta-Analysis Global Group in Chronic Heart Failure (MAGGIC) risk score was developed in 2013 to predict survival in heart failure (HF) patients. However, it has yet to be validated in a Chinese population. Our study aimed to investigate the ability of the score to predict 1-year mortality in a Chinese ***: Consecutive patients with HF were retrospectively selected from the inpatient electronic medical records of the cardiology department in a regional hospital in China. A total integer score was calculated for each enrolled patient based on the value of each risk factor in the MAGGIC scoring system. Each enrolled patient was followed for at least 1 year. The observational endpoint of this study was all-cause mortality. The predictive ability of the MAGGIC score was assessed by comparing observed and predicted mortality within 1 ***: Between January 2018 and December 2020, a total of 635 patients were included in the study: 57 (9.0%) of whom died within 1 year after discharge. The average age of all patients was 74.6 ± 11.2 years, 264 of them (41.6%) were male, and the average left ventricular ejection fraction was 50.7% ± 13.2%. The area under the receiver operating characteristic curve was 0.840 (95% confidence interval: 0.779, 0.901), which indicated a fair discriminatory ability of the score. The Hosmer-Lemeshow test result (χ^(2) = 12.902, degree of freedom = 8,P = 0.115) indicated that the MAGGIC score had good calibration. The decision curve analysis showed that the MAGGIC score yielded a good clinical net benefit and net reduction in ***: This validation of the MAGGIC score showed that it has a good ability to predict 1-year mortality in Chinese patients with HF after discharge. Due to regional and inter-hospital differences, external validation studies need to be further confirmed in other centers.

关键词： Validation Risk prediction MAGGIC Heart failure Mortality Chinese

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3D printed grafts with gradient structures for organized vascular regeneration

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international Journal of Extreme Manufacturing 2024年第3期6卷 505-520页

作者： Yuewei Chen Zhongfei Zou Tao Fu Zhuang Li Zhaojie Zhang Meng Zhu Qing Gao Shaofei Wu Guosheng Fu Yong He Jiayin Fu State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China School of Mechanical Engineering Guizhou UniversityGuiyang 550025People’s Republic of China Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province Department of CardiologySir Run Run Shaw HospitalZhejiang UniversityHangzhou 310016People’s Republic of China School of Mechanical Engineering Guizhou Institute of TechnologyGuiyang 550003People’s Republic of China department of Oral and Maxillofacial Surgery The Second Affiliated Hospital of Zhejiang University School of MedicineSchool of Stomatologyand Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhouZhejiang 310006People’s Republic of China

Synthetic vascular grafts suitable for small-diameter arteries(<6 mm) are in great ***,there are still no commercially available small-diameter vascular grafts(SDVGs) in clinical practice due to thrombosis and stenosis after in vivo *** designing SDVGs,many studies emphasized reendothelization but ignored the importance of reconstruction of the smooth muscle layer(SML).To facilitate rapid SML regeneration,a high-resolution 3D printing method was used to create a novel bilayer SDVG with structures and mechanical properties mimicking natural *** by the collagen alignment of SML,the inner layer of the grafts had larger pore sizes and high porosity to accelerate the infiltration of cells and their circumferential alignment,which could facilitate SML reconstruction for compliance restoration and spontaneous *** outer layer was designed to induce fibroblast recruitment by low porosity and minor pore size and provide SDVG with sufficient mechanical *** month after implantation,the arteries regenerated by 3D-printed grafts exhibited better pulsatility than electrospun grafts,with a compliance(8.9%) approaching that of natural arteries(11.36%) and significantly higher than that of electrospun ones(1.9%).The 3D-printed vascular demonstrated a three-layer structure more closely resembling natural arteries while electrospun grafts showed incomplete endothelium and immature *** study shows the importance of SML reconstruction during vascular graft regeneration and provides an effective strategy to reconstruct blood vessels through 3D-printed structures rapidly.

关键词： small-diameter vascular graft smooth muscle layer 3D printing endothelialization

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New Record Ocean Temperatures and Related Climate Indicators in 2023

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Advances in Atmospheric Sciences 2024年第6期41卷 1068-1082页

作者： Lijing CHENG John ABRAHAM Kevin E.TRENBERTH Tim BOYER Michael EMANN Jiang ZHU Fan WANG Fujiang YU Ricardo LOCARNINI John FASULLO Fei ZHENG Yuanlong LI Bin ZHANG Liying WAN Xingrong CHEN Dakui WANG Licheng FENG Xiangzhou SONG Yulong LIU Franco RESEGHETTI Simona SIMONCELLI Viktor GOURETSKI Gengxin CHEN Alexey MISHONOV Jim REAGAN Karina VON SCHUCKMANN Yuying PAN Zhetao TAN Yujing ZHU Wangxu WEI Guancheng LI Qiuping REN Lijuan CAO Yayang LU international Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of St.Thomas School of EngineeringMinnesota 55105USA NSF National Center for Atmospheric Research BoulderColorado 80307USA University of Auckland Auckland 1010New Zealand National Oceanic and Atmospheric Administration National Centers for Environmental InformationSilver SpringMaryland 20910USA department of Earth and Environmental Science University of PennsylvaniaPhiladelphiaPennsylvania 19104USA Institute of Oceanology Chinese Academy of SciencesQingdao 266071China National Marine Environmental Forecasting Center Ministry of Natural Resources of ChinaBeijing 100081China Oceanographic Data Center Chinese Academy of SciencesQingdao 266071China College of Oceanography Hohai UniversityNanjing 210098China National Marine Data and Information service Tianjin 300171China Italian National Agency for New Technologies Energy and Sustainable Economic DevelopmentS.Teresa Research CenterLerici 19032Italy Istituto Nazionale di Geofisica e Vulcanologia Sede di BolognaBologna 40128Italy South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China ESSIC/CISESS-MD University of MarylandCollege ParkMD20740USA Mercator Ocean international Toulouse 31400France Eco-Environmental Monitoring and Research Center Pearl River Valley and South China Sea Ecology and Environment AdministrationMinistry of Ecology and EnvironmentPRCGuangzhou 510611China National Meteorological Information Center China Meteorological AdministrationBeijing 100081China international Research Center of Big Data for Sustainable Development Goals Beijing 100094China

The global physical and biogeochemical environment has been substantially altered in response to increased atmospheric greenhouse gases from human *** 2023,the sea surface temperature(SST)and upper 2000 m ocean heat content(OHC)reached record *** 0–2000 m OHC in 2023 exceeded that of 2022 by 15±10 ZJ(1 Zetta Joules=1021 Joules)(updated IAP/CAS data);9±5 ZJ(NCEI/NOAA data).The Tropical Atlantic Ocean,the Mediterranean Sea,and southern oceans recorded their highest OHC observed since the *** with the onset of a strong El Niño,the global SST reached its record high in 2023 with an annual mean of~0.23℃ higher than 2022 and an astounding>0.3℃ above 2022 values for the second half of *** density stratification and spatial temperature inhomogeneity indexes reached their highest values in 2023.

关键词： ocean heat content salinity stratification global warming climate

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Ear Cholesteatoma Surgery in South Sahara: Our Experience in Bamako

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international Journal of Otolaryngology and Head & Neck Surgery 2024年第4期13卷 293-303页

作者： Kassim Diarra Oumou Coulibaly Yaya Dembele Nfaly Konaté Sidibe Youssouf Saydi Ag Mohamed Harouna Sanogo Abraham Diarra Ibrahim Fofana Moussa Bourama Keita Youssouf Traore Fatogoma Issa Koné Boubacary Guindo Siaka Soumaoro Doumbia Kadidiatou Singare Mohamed Amadou Keita ORLCCF department Gabriel Toure University Hospital Bamako Mali ORLCCF Unit Kati Army Polyclinics Kati Mali ENT-CCF department CHU Luxembourg Bamako Mali ORLCCF service of the Reference Center of Commune VI Sogoniko Bamako Mali

In Mali, cholesteatoma surgery remains a challenge due to the limited number of otological practitioners, and the low socio-economic level of patients reflecting the difficulties in performing CT or MRI for post-operative follow-up. We therefore initiated this work with the objective of analyzing, through a broad bibliographic review, the clinical, paraclinical, topographical, therapeutic and progressive aspects of a series of ear cholesteatoma. Materials and Method: This was a retrospective and prospective, descriptive study that took place in the ENT and head and neck surgery department of the Gabriel Touré University Hospital over 36 months from November 2020 to October 2023. These were patients admitted to the department for chronic cholestematous otitis media. Result: In total, we collected 34 files of patients admitted for cholesteatoma. This represented 9% of cases compared to all otological surgeries carried out during the same period, i.e. 362 cases. The average age of our patients was 35.31 years, with extremes ranging from 7 years to 80 years, there were 24 men and 10 women, i.e. a M/F ratio of 2.4. The average time to diagnosis was 7 years. The main functional signs were dominated by chronic fetid purulent otorrhea associated with hypoacusis in 94.6% of cases. One case of meningeal complication and three cases of cerebral empyema were reported. Clinically, a postero-superior and marginal tympanic perforation was observed in 53%, a retraction pocket in 5.9%, the sentinel polyp in 9%, and a non-marginal tympanic perforation in 32%. Pure-tone audiometry performed preoperatively for all patients showed conductive hearing loss in 83%. In 82% of cases we created a recess with the creation of a mini box. An ossiculoplasty was performed immediately with fragments of cartilage. The postoperative course found the disappearance of otorrhea (88.23%), the persistence of otorrhea in one case, two cases of facial paralysis, and one case of tinnitus. We did not identify

关键词： Cholesteatoma CT TTO TTF

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Protocol for the FACE study:frailty and comorbidity in elderly patients—a multicenter,Chinese observational cohort study

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Journal of Geriatric cardiology 2023年第1期20卷 83-90页

作者： Wen ZHENG Xin HUANG Min SUO Xiao WANG Xue-Dong ZHAO Wei GONG Yan YAN Xiao-Na WANG Li SHENG Shao-Ping NIE department of cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijingChina department of cardiology Beijing Shijitan HospitalCapital Medical UniversityBeijingChina department of Geriatric cardiology National Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijingChina

The present protocol describes an observational cohort study that was designed to propose a therapeutic scheme and formulate an individualized treatment strategy for frail elderly patients diagnosed with multiple diseases in a Chinese,multicenter *** a 3-year period,we will recruit 30,000 patients from 10 hospitals and collect baseline data including patient demographic information,comorbidity characteristic,FRAIL scale,age-adjusted Charlson comorbidity index(aCCI),relevant blood tests,the results of imaging examination,prescription of drugs,length of hospital stay,number of overall re-hospitalizations and *** patients(≥65 years old)with multimorbidity and receiving hospital care are eligible for this *** collection is being performed at baseline and 3,6,9 and 12 months after *** primary analysis was all-cause death,readmission rate and clinical events(including emergency visits,stroke,heart failure,myocardial infarction,tumor,acute chronic obstructive pulmonary disease,etc).The study is approved by the National Key R&D Program of China(2020YFC2004800).Data will be disseminated in manuscripts submitted to medical journals and in abstracts submitted to international geriatric *** Trial Registration:[***],identifier[ChiCTR2200056070].

关键词： patients morbidity prescription

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