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A case of post traumatic mitral chordae rupture mimicking acute respiratory distress syndrome

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World Journal of Emergency Medicine 2024年第4期15卷 322-324页

作者： hülya Deniz Misir Nalan Demir Ferit Kasimzade Cansu Yahşi Intensive Care Department Ankara Bilkent City HospitalAnkara 06800Turkiye Intensive Care Department University of Health Sciences Ankara Bilkent City HospitalAnkara 06800Turkiye Cardiovascular Surgery Department Ankara Bilkent City HospitalAnkara 06800Turkiye Pulmonary Medicine Department University of Health Sciences Ankara Bilkent City HospitalAnkara 06800Turkiye

Traumatic mitral chordae rupture is a rare and known cause of acute mitral valve regurgitation and de novo heart *** pathologies in a trauma patient may mask the findings of de novo heart failure due to mitral chordae *** patients may also have other potential pre-diagnoses that could explain symptoms related to heart failure,such as tachycardia,circulatory shock,and acute *** possibility of traumatic chordae tendinea rupture being a preventable cause of mortality should be carefully evaluated.

关键词： rupture mitral acute

Influence of erbium on structural,and charged particles,photons,and neutrons shielding properties of Ba_(1-x)Er_(x)SnO_(3) perovskite ceramics

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： M.K.h.hamad Nidal Dwaikat M.h.A.Mhareb M.I.Sayyed R.M.hamad Y.S.M.Alajerami M.A.Almessiere Gameel Saleh Ahmad hussein Alomari K.A.Ziq Department of Basic Sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Department of Physics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Department of Physics Faculty of ScienceIsra UniversityAmman11622Jordan Department of Nuclear Medicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia Medical Imaging Department Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Department of Biomedical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&Minerals Regulatory Commission Amman11821Jordan

Five perovskite ceramics samples of Ba_(1-x)Er_(x)SnO_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were synthesized using the conventional solid-state reaction *** prepared samples were characterized by X-ray diffraction(XRD),Fourier transforms infrared(FTIR),and UV-Vis *** shielding properties against ionizing radiation were also *** XRD analysis shows the perovskite cubic structure as the major phase in all *** FTIR reveals a distinctive band around 614-620 cm^(-1) ascribed to the antisymmetric O-Sn-O ***-Vis spectroscopy was used to determine the bandgap according to diffuse reflectance,and the results display a fixed enhancement in the bandgap from 3.2 to 3.3 eV for all ***-ray shielding properties of the synthesized samples were experimentally measured and compared with XCOM computational *** relative differences(Δ,%)between experimental and theo retical values are low and fall within the 0.446%-7.10%*** addition of Er leads to the enhanced density,neutron,and gamma shielding *** contrast,charged particles’shielding parameters gradually reduce with rising Er *** results suggest that Ba_(1-x)Er_(x)SnO_(3) samples can be used in different radiation shielding applications.

关键词： Perovskite Ceramics Gamma ray shielding Mass stopping power Rare earths

Superior antibody and membrane protein‑specific T‑cell responses to CoronaVac by intradermal versus intramuscular routes in adolescents

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World Journal of Pediatrics 2024年第4期20卷 353-370页

作者： Jaime S.Rosa Duque Samuel M.S.Cheng Carolyn A.Cohen Daniel Leung Xiwei Wang Xiaofeng Mu Yuet Chung Tsun Ming Lau Manni Wang Wenyue Zhang Yanmei Zhang howard h.W.Wong Leo C.h.Tsang Sara Chaothai Tsz Chun Kwan John K.C.Li Karl C.K.Chan Leo L.h.Luk Jenson C.h.ho Wing Yan Li Amos M.T.Lee Jennifer h.Y.Lam Sau Man Chan Wilfred h.S.Wong Issan Y.S.Tam Masashi Mori Sophie A.Valkenburg Malik Peiris Wenwei Tu Yu Lung Lau Department of Paediatrics and Adolescent Medicine The University of Hong KongHong KongChina School of Public health The University of Hong KongHong KongChina hKU‑Pasteur Research Pole School of Public HealthThe University of Hong KongHong KongChina Research Institute for Bioresources and Biotechnology Ishikawa Prefectural UniversityNonoichiJapan Department of Microbiology and Immunology Peter Doherty Institute for Infectionand ImmunityUniversity of MelbourneMelbourneVICAustralia Center for Immunology and Infection C2i Hong KongChina

Background Optimising the immunogenicity of COVID-19 vaccines to improve their protection against disease is *** dosing by intradermal(ID)administration has been shown to be equally immunogenic as intramuscular(IM)administration for several vaccines,but the immunogenicity of ID inactivated whole severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)at the full dose is *** study(NCT04800133)investigated the superiority of antibody and T-cell responses of full-dose CoronaVac by ID over IM administration in *** Participants aged 11–17 years received two doses of IM or ID vaccine,followed by the 3rd dose 13–42 days *** and cellular immunogenicity outcomes were measured post-dose 2(IM-CC versus ID-CC)and post-dose 3(IMCCC versus ID-CCC).Doses 2 and 3 were administered to 173 and 104 adolescents,*** Spike protein(S)immunoglobulin G(IgG),S-receptor-binding domain(RBD)IgG,S IgG Fcγreceptor IIIa(FcγRIIIa)-binding,SNM[sum of individual(S),nucleocapsid protein(N),and membrane protein(M)peptide pool]-specific interleukin-2(IL-2)+CD4^(+),SNM-specific IL-2^(+)CD8^(+),S-specific IL-2^(+)CD8^(+),N-specific IL-2^(+)CD4^(+),N-specific IL-2^(+)CD8^(+)and M-specific IL-2^(+)CD4^(+)responses fulfilled the superior and non-inferior criteria for ID-CC compared to IM-CC,whereas IgG avidity was *** ID-CCC,S-RBD IgG,surrogate virus neutralisation test,90%plaque reduction neutralisation titre(PRNT90),PRNT50,S IgG avidity,S IgG FcγRIIIa-binding,M-specific IL-2^(+)CD4^(+),interferon-γ+CD8^(+)and IL-2^(+)CD8^(+)responses were superior and non-inferior to *** estimated vaccine efficacies were 49%,52%,66%and 79%for IM-CC,ID-CC,IM-CCC and ID-CCC,*** ID groups reported more local,mild adverse *** This is the first study to demonstrate superior antibody and M-specific T-cell responses by ID inactivated SARSCoV-2 vaccination and serves as the basis for future research to improve the

关键词： CoronaVac Coronavirus disease 2019 Immunity Intradermal Vaccine

人类活动对木里冻土区水文环境影响的多元同位素示踪

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地球科学 2024年第5期49卷 1891-1906页

作者：邢剑伟李小倩周爱国庞守吉李鑫余迎祥中国地质大学环境学院湖北武汉430074 国家环境保护水污染溯源与管控重点实验室湖北武汉430074 中国地质调查局油气资源调查中心北京100083

为查明人类活动对木里冻土区水文环境造成的影响,选取高寒冻土区人类活动最为显著的木里煤田聚乎更矿区,以区内大通河支流水系河水为研究对象,基于水化学组成空间特征,利用氢、氧、碳、氮、硫、锶等多元同位素开展示踪研究.研究表明:(1... 详细信息

为查明人类活动对木里冻土区水文环境造成的影响,选取高寒冻土区人类活动最为显著的木里煤田聚乎更矿区,以区内大通河支流水系河水为研究对象,基于水化学组成空间特征,利用氢、氧、碳、氮、硫、锶等多元同位素开展示踪研究.研究表明:(1)冻结层上水是河水的主要补给来源,煤矿开采、天然气水合物钻探等人类活动破坏原有冻土结构,增加了冻结层上水对河水的贡献比例;(2)河水中主要溶解性营养物质(SO_(4)^(2-)、NO_(3)^(-)和DOC)浓度的增加源于人类活动的影响:硫氧同位素揭示了大规模的煤矿露天开采促进还原硫氧化,是导致冻结层上水和河水中SO_(4)^(2-)升高的主要原因;氮氧同位素表明河水中高浓度的NO_(3)^(-)来源于散养式放牧的牲畜粪便;DOC主要来源于高寒草甸植物降解产生的土壤有机质,人类活动影响下增加了DOC和DIC的输出,增强了源区河水中的微生物活动;(3)除h_(2)CO_(3)风化碳酸盐岩外,受人类活动煤矿开采影响下硫酸参与的碳酸盐岩和硅酸盐岩岩石风化作用增强,进而影响着区域岩石风化的碳汇作用.研究成果为认识人类活动影响下高寒冻土区水文环境的演化提供研究思路,为高寒冻土区生态环境保护提供科学依据.

关键词：木里冻土区煤矿开采天然气水合物钻探同位素环境效应水文地质

碳含量对CrN:a-C多相复合涂层摩擦学性能的影响

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材料研究学报 2024年第4期38卷 297-307页

作者：马飞王闯郭武明史祥东孙建颖庞刚内燃机与动力系统全国重点实验室潍坊261061 中国科学院宁波材料技术与工程研究所、中国科学院海洋新材料与应用技术重点实验室、浙江省海洋材料与防护技术重点实验室宁波315201 潍柴动力股份有限公司潍坊261061

分别以Cr靶、N_(2)与C_(2)h_(2)作为Cr源、氮源与碳源,采用多弧离子镀技术制备CrN:a-C多相复合涂层,通过调节C_(2)h_(2)的流量改变涂层中碳的含量,使用X射线衍射仪(XRD)、拉曼光谱(Raman)、场发射扫描电镜热场(FE-SEM)、多功能摩擦磨损... 详细信息

分别以Cr靶、N_(2)与C_(2)h_(2)作为Cr源、氮源与碳源,采用多弧离子镀技术制备CrN:a-C多相复合涂层,通过调节C_(2)h_(2)的流量改变涂层中碳的含量,使用X射线衍射仪(XRD)、拉曼光谱(Raman)、场发射扫描电镜热场(FE-SEM)、多功能摩擦磨损试验机等手段研究了碳含量对其组成结构、机械性能以及摩擦学性能的影响。结果表明:随着涂层内碳含量的提高涂层非晶碳的结构特征逐渐明显和涂层致密性降低,使机械性能降低但是其结合力和硬度仍然比较高。在干摩擦和5W-30润滑油环境中涂层均呈现出较好的低摩擦与低磨损特性。碳含量和摩擦产物的影响,使摩擦系数和磨损率在两种环境中均先提高后降低。在C_(2)h_(2)流量为120 sccm的条件下在干摩擦和润滑油环境中涂层的摩擦系数分别为0.33和0.12,磨损率分别为1.3×10^(-5)mm^(3)/(N·m)和7.4×10^(-6)mm^(3)/(N·m),可为摩擦副部件提供有效的减磨抗磨防护作用。

关键词：材料表面与界面 CrN:a-C多相复合涂层氮化铬非晶碳摩擦学性能

Predicting potential invasion risks of Leucaena leucocephala(Lam.)de Wit in the arid area of Saudi Arabia

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Journal of Arid Land 2024年第7期16卷 983-999页

作者： haq S MARIFATUL Darwish MOhAMMED Waheed MUhAMMAD Kumar MANOJ Siddiqui h MANZER Bussmann W RAINER Department of Ethnobotany Institute of BotanyIlia State UniversityTbilisi 0162Georgia The Centre of Excellence on Sustainable Land Management(CoE-SLM) Indian Council of Forestry Research and EducationDehradun 248006India Department of Botany and Microbiology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Botany State Museum for Natural HistoryKarlsruhe 76133Germany

The presence of invasive plant species poses a substantial ecological impact,thus comprehensive evaluation of their potential range and risk under the influence of climate change is *** study uses maximum entropy(MaxEnt)modeling to forecast the likelihood of Leucaena leucocephala(Lam.)de Wit invasion in Saudi Arabia under present and future climate change *** the MaxEnt modeling,we integrated climatic and soil data to predict habitat suitability for the invasive *** conducted a detailed analysis of the distribution patterns of the species,using climate variables and ecological *** focused on the important influence of temperature seasonality,temperature annual range,and precipitation *** distribution modeling used robust measures of area under the curve(AUC)and receiver-operator characteristic(ROC)curves,to map the invasion extent,which has a high level of accuracy in identifying appropriate *** complex interaction that influenced the invasion of *** was highlighted by the environmental parameters using Jackknife ***,the actual geographic area where *** was found in Saudi Arabia was considerably smaller than the theoretical maximum range,suggesting that it had the capacity to expand *** MaxEnt model exhibited excellent prediction accuracy and produced reliable results based on the data from the ROC *** and temperature were the primary factors influencing the potential distribution of ***,an estimated area of 216,342 km^(2)in Saudi Arabia was at a high probability of invasion by *** investigated the potential for increased invasion hazards in the future due to climate change scenarios(Shared Socioeconomic Pathways(SSPs)245 and 585).The analysis of key climatic variables,including temperature seasonality and annual range,along with soil properties such as clay composition and nitrogen content,unveiled their substanti

关键词： area under the curve invasive species invasion risks climate change MaxEnt model

Single-pilot operations in commercial flight:Effects on neural activity and visual behaviour under abnormalities and emergencies

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Chinese Journal of Aeronautics 2024年第8期37卷 277-292页

作者： Qinbiao LI Chun-hsien ChEN Kam K.h.NG Xin YUAN Cho Yin YIU human Factors and Ergonomics Laboratory Department of Aeronautical and Aviation EngineeringThe Hong Kong Polytechnic UniversityHong Kong Special Administrative Region 100872China School of Mechanical&Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore

With cutting-edge technologies and considering airline human-resource-saving,a single pilot in commercial jets could be technically *** changes in captains’natural behaviours are initially required to comprehend the specific safe human performance envelope for safeguarding single-pilot flight,particularly in high-risk *** paper investigates how captains’performance transforms for fixing emergencies when operating from Dual-Pilot Operations(DPO)to Single-Pilot Operations(SPO)through a physiological-based *** pilots flew an emergency-included flight with/without first officers’*** neural activities and scanning behaviours were recorded using a 32-channel Electroencephalogram(EEG)and glasses-based eye tracker,with the observation and post-experiment questionnaires to evaluate the flight operations and pilots’*** alone,there was a significantly increased cortical activity in h.and b waves over the frontal,parietal,and temporal lobes during the more complicated emergencies,and pilots focused less on the primary flight display while spending significantly more time scanning the other *** physiological fluctuating patterns associated with risky operations in SPO were highlighted by cross-correlating multimodal *** experimental-based noteworthy insights may wish to inform commercial SPO measures to lessen the persistent physiological fluctuation,assisting airlines in creating SPO-oriented intelligent flight systems to give captains adequate support for assuring safer air transportation.

关键词： Aviation engineering Single pilot operations Behaviour changes Eye tracker Electroencephalogram

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发酵饲料对肉鸡生长性能及经济效益的影响

饲料研究 2024年第7期47卷 44-48页

作者：余素芳庞孟瑶重庆科创职业学院重庆402160

试验旨在研究发酵饲料对肉鸡生长性能、肉品质及经济效益的影响。试验选择1 600只AA肉鸡分成4组,每组4个重复,每个重复100只肉鸡。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加2.5%、5.0%及10.0%发酵饲料。试验期42 d。结果显示:与... 详细信息

试验旨在研究发酵饲料对肉鸡生长性能、肉品质及经济效益的影响。试验选择1 600只AA肉鸡分成4组,每组4个重复,每个重复100只肉鸡。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加2.5%、5.0%及10.0%发酵饲料。试验期42 d。结果显示:与对照组相比,22~42日龄,5.0%组和10.0%组42日龄体重、平均日增重及平均日采食量显著升高(Ph24 h值、L*值、b*值及蒸煮损失显著降低(P<0.05),2.5%组、5.0%组和10.0%组肌肉剪切力显著降低(P<0.05),5.0%组和10.0%组肌肉中甘氨酸、肌苷酸含量显著升高(P<0.05)。2.5%组、5.0%组和10.0%组的增重收益分别比对照组提高了2.55%、8.74%、12.26%,养殖利润分别提高了2.69%、11.73%、13.15%。研究表明,肉鸡饲喂适量的发酵饲料可以提高生长性能,改善肉品质,增加养殖利润,饲喂5%~10%的发酵饲料较为适宜。

关键词：发酵饲料 AA肉鸡生长性能肉品质经济效益

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Photoluminescence and ratiometric thermo-response of Eu^(2+)and Eu^(3+)in BaAl_(2)B_(2)O_(7):Eu^(2+),Eu^(3+)phosphor materials

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Journal of Rare Earths 2024年第7期42卷 1240-1249,I0002页

作者： Ziyao Wang haitao Fu Xiufeng Zhan Bo Tong Guofeng Ma h.T.(Bert)hintzen Institute of Innovative Science and Technology Shenyang UniversityShenyang110044China College of Mechanical Engineering Shenyang UniversityShenyang110044China Faculty of Applied Sciences Delft University of Technology2629 JBDelftthe Netherlands

A novel Eu^(2+)-Eu^(3+)co-activated ratiometric thermo-sensitive phosphor was developed and synthesized by solid-state *** valence state of Eu,photoluminescence and thermo-sensitive performance of the phosphor prepared either in ambient air or carbothermally were investigated and *** phosphor shows high sensitivity(Sa=0.0173 K^(-1),S_(r)=0.461%/K)and superior signal discriminability(Δν∼10380 cm^(−1)).The thermo-sensitive performance is subject to the dual effects of different thermo-responses by Eu^(2+)versus Eu^(3+)combined with energy transfer from Eu^(2+)to Eu^(3+),so that the sensitivity of the phosphor in the temperature range presents a non-monotonic *** development of the BaAl_(2)B_(2)O_(7):Eu^(2+),Eu^(3+)phosphor is not only expected to be relevant for application in the field of temperature sensing,but also of reference significance for improving the sensitivity by means of energy transfer between co-activator ions over a wider temperature range of Eu^(2+)-Eu^(3+)co-activated ratiometric thermo-sensitive phosphors.

关键词： Photoluminescence Ratiometric thermo-response Phosphor Eu^(2+)/Eu^(3+) Rare earths