检索结果-南通市图书馆

突发公共卫生事件下急进高原作业的医务人员急性高原反应与心理状况调查

在线全文

学校读者我要写书评

暂无评论

中国医刊 2024年第6期59卷 636-639页

作者：田璐刘毅田腾飞潘伟刚迟勇首都医科大学附属北京安定医院国家精神疾病医学中心国家精神心理疾病临床医学研究中心精神疾病诊断与治疗北京市重点实验室北京100088

目的对突发公共卫生事件下急进高原作业的医务人员的急性高原反应(AMS)与心理状况进行调查,旨在为预防AMS的发生及制订心理干预策略提供科学依据。方法研究对象为2022年8月26日至9月9日紧急进入拉萨市开展医疗支援工作的医务人员。通过... 详细信息

目的对突发公共卫生事件下急进高原作业的医务人员的急性高原反应(AMS)与心理状况进行调查,旨在为预防AMS的发生及制订心理干预策略提供科学依据。方法研究对象为2022年8月26日至9月9日紧急进入拉萨市开展医疗支援工作的医务人员。通过AMS临床症状量表将得分0~10分的受试者纳入轻微高原反应(SAMS)组,≥11分的受试者纳入高原反应(AMS)组。调查两组一般资料及情绪状态自评量表、压力感受量表-10(PSS-10)、9项患者健康问卷(PHQ-9)、7项广泛性焦虑障碍量表(GAD-7)评分。结果共调查175名医务人员,其中SAMS组108名,AMS组67名,PHQ-9检出抑郁情绪发生率为49.71%,GAD-7检出焦虑情绪发生率为18.86%。与SAMS组相比,AMS组无高原经历的比例、PHQ-9阳性率、PSS-10评分以及情绪自评量表中疲劳、失眠、食欲减退、担心被感染维度评分均更高,差异有统计学意义(P<0.05)。二元logistic回归分析显示,PSS-10评分(OR=1.091,95%CI 1.020~1.167,P=0.011)及无高原经历(OR=2.614,95%CI 1.047~6.529,P=0.040)是急进高原作业的医务人员发生AMS的危险因素。结论急进高原作业的医务人员容易发生AMS,且存在突出的焦虑抑郁情绪,缺少高原经历及压力感知突出者AMS更显著,有必要对其开展针对性的预防及心理干预。

关键词：突发公共卫生事件急性高原反应心理健康医务人员

New contributions to the phylogeny of the ciliate class Heterotrichea(Protista,Ciliophora):analyses at family-genus level and new evolutionary hypotheses

在线全文

学校读者我要写书评

暂无评论

Science china(Life Sciences) 2021年第4期64卷 606-620页

作者： yong chi Xiangrui Chen Yuqing Li Chundi Wang Tengteng Zhang Alex Ayoub Alan Warren Weibo Song Yuanyuan Wang Instiue of Evoluion&Marine Biodiversity and College of Fisheries Ocean University of ChinaQingdao 266003China School of Marine Sciences Ningbo University Ningbo 315211China Department of Pathology University of MichiganAnn Arbor M148109USA Deparmen of Life Sciences Narural Histony MuseumLondon SW75BDUK Laboratory for Marine Biology&Biotechnologr.Qingdao National Laboratory for Marine Science and TechnologyQingdao 266003China College of Marine Life Sciences Ocean Universiy of ChinaQingdao 266003.China

Heterotrichous ciliates play an important role in aquatic ecosystem energy flow processes and many are model organisms for research in cytology,regenerative biology,and *** the present study,we combine both morphological and molecular data to infer phylogenetic relationships at family-genus level and propose new evolutionary hypotheses for the class *** main results include:(1)96 new ribosomal DNA sequences from 36 populations,representing eight families and 13 genera,including three poorly annotated genera,Folliculinopsis,Ampullofolliculina and Linostomella;(2)the earliest-branching families are Spirostomidae in single-gene trees and Peritromidae in the concatenated tree,but the family Peritromidae probably represents the basal lineage based on its possession of many"primitive"morphological characters;(3)some findings in molecular trees are not supported by morphological evidence,such as the family Blepharismidae is one of the most recent branches and the relationship between Fabreidae and Folliculinidae is very close;(4)the systematic positions of Condylostomatidae,Climacostomidae,and Gruberiidae remain uncertain based either on morphological or molecular data;and(5)the monophyly of each genus included in the present study is supported by the molecular phylogenetic trees,except for Blepharisma in the SSU r DNA tree and Folliculina in the ITS1-5.8 S-ITS2 tree.

关键词： evolutionary hypothesis molecular cladogram morphological cladogram multi-gene systematic relationship

Expression and self-assembly of Heterocapsa circularisquama RNA virus-like particles synthesized in Pichia pastoris

在线全文

学校读者我要写书评

暂无评论

chinese Science Bulletin 2012年第25期57卷 3288-3293页

作者： WU YuanZheng KIM Wonduck KIM Si-Wou EOM chi-yong YANG HeTong SHIN Hyun-Jae Department of Chemical and Biochemical Engineering Chosun University Gwangju 501-759 Republic of Korea Department of Environmental Engineering Chosun University Gwangju 501-759 Republic of Korea Seoul Center Korea Basic Science Institute Seoul 136-713 Republic of Korea Biotechnology Center of Shandong Academy of Sciences Jinan 250014 China

Heterocapsa circularisquama RNA virus(HcRNAV) is the first single-stranded RNA virus to be characterized that infects *** ability of HcRNAV coat protein(HcRNAV CP) to self-assemble into virus-like particles(VLPs) in vitro suggested that heterologous expression was possible,and that the VLPs might be ideal nanocontainers for the targeted delivery of genes and *** this paper,we report the expression of a codon-optimized HcRNAV 109 CP gene in Pichia pastoris and the production of self-assembled HcRNAV VLPs using large-scale *** HcRNAV 109 CP gene was synthesized according to the codon preference of *** and cloned into a pPICZA *** recombinant plasmid pPICZA-CPsyns was transformed into *** by *** resulting yeast colonies were screened by PCR and analyzed for protein expression by SDS polyacrylamide gel *** large-scale fermentation,the yield of HcRNAV CPsyns reached approximately 2.5 g L 1 within 4 *** HcRNAV VLPs were purified using PEG precipitation followed by cesium chloride density gradient ultracentrifugation,and were subsequently analyzed using UV spectrophotometry and transmission electron *** dye-labeled myoglobin was loaded into the cages of the HcRNAV VLPs and the encapsulation was confirmed by fluorescence *** results point to the possible utilization in pharmacology or nanotechnology of HcRNAV VLPs produced by *** fermentation.

关键词：巴斯德毕赤酵母病毒样颗粒 RNA病毒 pastoris 基因合成自组装透射电子显微镜分析紫外分光光度法

Vibration-assisted vat photopolymerization for pixelated-aliasing-free surface fabrication

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2024年第3期6卷 440-456页

作者： Han Xu Renzhi Hu Shuai Chen Junhong Zhu chi Zhou yong Chen Center for Advanced Manufacturing University of Southern CaliforniaLos AngelesCA 90007United States of America Daniel J.Epstein Department of Industrial and Systems Engineering University of Southern CaliforniaLos AngelesCA 90089United States of America Department of Aerospace and Mechanical Engineering University of Southern CaliforniaLos AngelesCA 90089United States of America Department of Industrial and Systems Engineering University of BuffaloBuffaloNY 14260United States of America

Mask image projection-based vat photopolymerization(MIP-VPP)offers advantages like low cost,high resolution,and a wide material range,making it popular in industry and ***,MIP-VPP employing liquid crystal displays(LCDs)has gained traction,increasingly replacing digital micromirror devices,particularly among hobbyists and in educational settings,and is now beginning to be used in industrial ***,LCD-based MIP-VPPsuffers from pronounced pixelated aliasing arising from LCD’s discrete image pixels and itsdirect-contact configuration in MIP-VPP machines,leading to rough surfaces on the 3D-printed ***,we propose a vibration-assisted MIP-VPP method that utilizes a microscalevibration to uniformize the light intensity distribution of the LCD-based mask image on VPP’s building *** maintaining the same fabrication speed,our technique generates asmoother,non-pixelated mask image,reducing the roughness on flat surfaces and boundary segments of 3D-printed *** light intensity modeling and simulation,we derived an optimal vibration pattern for LCD mask images,subsequently validated by *** assessed the surface texture,boundary integrity,and dimensional accuracy of componentsproduced using the vibration-assisted *** notably smoother surfaces and improved boundary roughness enhance the printing quality of MIP-VPP,enabling its promisingapplications in sectors like the production of 3D-printed optical devices and others.

关键词： additive manufacturing vat photopolymerization piezo vibration sub-pixel resolution aliasing

Doublets of the unicellular organism Euplotes vannus(Alveolata,Ciliophora,Euplotida):the morphogenetic patterns of the ciliary and nuclear apparatuses associated with cell division

在线全文

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2022年第4期4卷 527-535页

作者： Jinyu Fu yong chi Xiaoteng Lu Feng Gao Saleh A.Al-Farraj Giulio Petroni Jiamei Jiang Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao266003China Department of Biology Shenzhen MSU-BIT UniversityShenzhen518172China Zoology Department College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia Department of Biology University of Pisa56126PisaItaly Engineering Research Center of Environmental DNA and Ecological Water Health Assessment Shanghai Ocean UniversityShanghai201306China

Ciliated protists are one of the most diverse and highly differentiated group among unicellular *** occur in ciliates when two cells fuse into a single *** contain two major cellular components(either cell in a doublet)and have traditionally been considered as developmental ***,doublets can divide or even conjugate effectively,which may represent dispersal forms of the life *** addition,morphogenesis,as an important process in the life cycle,will provide important insights into the complex differentiation mechanism and various physiological ***,morphogenetic studies focusing on doublets of ciliates are very limited,which has become an obstacle to understand their complete life *** we isolated a doublet strain from the marine species Euplotes vannus(Müller,1786)Diesing,1850 and investigated its morphogenetic events during asexual *** results indicate that:(1)the opisthe’s oral primordium develops de novo beneath the cortex;(2)the frontoventral and transverse cirral anlagen,cirrus I/1,and marginal anlagen in both dividers develop de novo separately;(3)the dorsal kinety anlagen,the three rightmost ones of which produce three caudal cirri for the proter,occur within the parental structures in the mid-body region;(4)the opisthe acquires two caudal cirri,one from the end of each two rightmost kineties;and(5)there are two macronuclei and one micronucleus in the doublet and they divide amitotically and mitotically,***,we speculate that this special differentiation may be an adaptive form to adverse environments.

关键词： Binary fission Ciliature Doublet Euplotids Morphogenesis

Research on low emission MSW gasification and melting system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2007年第4期1卷 498-503页

作者： XIAO Gang NI Mingjiang chi yong JIN Yuqi ZHANG Jiaquan MIAO Qi CEN Kefa State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory on Clean Coal Power Generation and Combustion Technology of MOE Southeast UniversityNanjing 210096China

In order to eliminate secondary pollution caused by municipal solid waste(MSW)incineration,a MSW gasification and melting process is *** process is expected to reduce the emission of pollutants,especially heavy-metals and *** this paper,the combustible components of MSW and simulated MSW were gasified in a lab-scale fluidized bed at 400°C-700°C when the excess air ratio(ER)was between 0.2 and *** experimental results indicated that the MSW could be gasified effectively in a fluidized bed at approximately 600°C-700°C when excess air ratio was *** melting characteristics of two typical fly ash samples from MSW incinerators were *** results indicated that fly ash of pure MSW incineration could be melted at approximately 1,300°C and that of MSW and coal co-combustion could be melted at approximately 1,400°*** temperature was over 1,100°C,more than 99.9%of the dioxins could be decomposed and most of the heavy-metals could be solidified in the *** on the above experiments,two feasible MSW gasification and mel-ting processes were proposed for low calorific value MSW:(1)sieved MSW gasification and melting system,which was based on an idea of multi-recycle;(2)gasification and melting scheme of MSW adding coal as assistant fuel.

关键词： municipal solid waste(MSW) low emission gasification and melting dioxins heavy-metal

Timing and characteristics of nuclear events during conjugation and genomic exclusion in Paramecium multimicronucleatum

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2022年第3期4卷 317-328页

作者： Xue Zhang Xiaoteng Lu yong chi Yaohan Jiang Chundi Wang Saleh AAl‑Farraj Adriana Vallesi Feng Gao Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao 266003China Key Laboratory of Mariculture(OUC) Ministry of EducationQingdao 266003China Department of Biology Shenzhen MSU-BIT UniversityShenzhen 518172China Laboratory of Marine Protozoan Biodiversity and Evolution Shandong UniversityWeihai 264209China Zoology Department College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Laboratory of Eukaryotic Microbiology and Animal Biology University of Camerino62032 CamerinoItaly Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Ciliated protists are ideal material for studying the origin and evolution of sex,because of their nuclear dimorphism(containing both germline micronucleus and somatic macronucleus in the same cytoplasm),special sexual processes(conjugation and autogamy),and high diversity of mating-type ***,the study of sexual process is limited to only a few species,due to the difficulties in inducing or observing *** the present study,we investigate the conjugation process in Paramecium multimicronucleatum:(1)of the three prezygotic divisions,all micronuclei undergo the first two divisions(meiosis I,II),while a variable number of nuclei undergo the third division(mitosis);(2)the synkaryon divides three times after fertilization,giving rise to eight products that differentiate into four macronuclear anlagen and four micronuclei;(3)cells restore the vegetative stage after two successive cell fissions during which the macronuclear anlagen are distributed into daughter cells without division,while micronuclei divide mitotically;(4)the parental macronucleus begins to fragment following the first meiotic division and finally degenerates completely;(5)the entire process takes about 110 h,of which about 85 h are required for macronuclear *** addition,we describe for the first time the process of genomic exclusion occurring between amicronucleate and micronucleate cells of ***,during which the micronucleate cell contributes a pronucleus to the amicronucleate cell,resulting in both exconjugants being *** results provide new insights into the diversity of sexual processes and lay an important cytological basis for future in-depth studies of mating systems in ciliates.

关键词： Amicronucleate cells Nuclear development Ciliate Life cycle Sexual reproduction

Experimental study on MSW gasification and melting technology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第11期19卷 1398-1403页

作者： XIAO Gang JIN Bao-sheng ZHONG Zhao-ping chi yong NI Ming-jiang CEN Ke-fa XIAO Rui HUANG Ya-ji HUANG He Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China College of Life Science and Pharmaceutical Engineering Nanjing University of Technology Nanjing 210009 China

In order to develop municipal solid waste （MSW） gasification and melting technology, two preliminary experiments and a principle integrated experiment were fulfilled respectively. The gasification characteristics of MSW were studied at 500-750℃ when equivalence ratio （ER） was 0.2--0.5 using a fluidized-bed gasifier. When temperature was 550-700℃ and ER was 0.2--0.4, low heat value （LHV） of syngas reaches 4000-12000 kJ/Nm^3. The melting characteristics of fly ash were investigated at 1100-1460℃ using a fixed-bed furnace. It was proved that over 99.9% of dioxins could be decomposed and most heavy-metals could be solidified when temperature was 1100-1300℃. The principle integrated experiment was carried out in a fluidized-bed gasification and swirl-melting system. MSW was gasified etticiently at 550-650℃, swirl-melting furnace maintains at 1200-1300℃ stably and over 95% of fly ash could be caught by the swirl-melting furnace. The results provided much practical experience and basic data to develop MSW gasification and melting technology.

关键词： municipal solid waste (MSW) fluidized-bed gasification swirl-melting characteristics

Influence of upstream solar wind on magnetic field distribution in the Martian nightside ionosphere

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第5期8卷 728-741页

作者： JiaWei Gao ZhaoJin Rong Qi Zhang Anna Mittelholz chi Zhang yong Wei Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Swedish Institute of Space Physics Department of Earth Sciences Center for Space Physics and Department of Astronomy Boston University

Using over eight years of Mars Atmosphere and Volatile Evolutio N （MAVEN） data,from November 2014 to May 2023,we have investigated the Martian nightside ionospheric magnetic field distribution under the influence of upstream solar wind drivers,including the interplanetary magnetic field intensity (∣BIMF∣),solar wind dynamic pressure （PSW）,solar extreme ultraviolet flux （EUV）,and Martian seasons （Ls）.Our analysis reveals pronounced correlations between magnetic field residuals and both∣BIMF∣and *** observed with EUV flux and Lswere weaker—notably,magnetic field residuals increased during periods of high EUV flux and at Mars *** find that the IMF penetrates to an altitude of 200 km under a wide range of upstream conditions,penetrating notably deeper under high∣BIMF∣*** analysis also indicates that EUV flux and IMF cone angle have minimal impact on IMF penetration *** findings provide useful constraints on the dynamic nature of Martian atmospheric escape processes and their evolution,suggesting that historical solar wind conditions may have facilitated deeper IMF penetration and higher rates of ionospheric escape than are observed ***,by establishing criteria for magnetic‘quiet’conditions,this study offers new insights into the planet’s magnetic environment under varying solar wind influences,knowledge that should help refine models of the Martian crustal magnetic field.

关键词： Martian magnetic field external magnetic field upstream solar wind drivers IMF penetration altitude magnetic field activity indices