检索结果-南通市图书馆

journal of Innovative Optical Health Sciences 2021年第6期4卷 42-54页

作者： Om Prakash Singh Ismail m.El-Badawy m.B.malarvili Bio-signal Processing Research Group(BSPRG)School of Biosciences and medical Engineering Universiti Teknologi malaysia(UTm) 81310 SkudaiJohorMalaysia Electronics and Communication Engineering Department Arab Academy for Science and Technology CairoEgypt School of Electrical Engineering Universiti Teknologi Malaysia(UTM)81310 SkudaiJohorMalaysia Bio-Signal Processing Research Group(BSPRG)School of Biosciences and medical Engineering Universiti Teknologi malaysia(UTm) 81310 SkudaiJohorMalaysia

The design of a handheld capnography device is in great demand because of its effective and practical uses in all cardiac arrest resuscitations,according to the recommendation of the American Heart ***,a handheld capnography device that can be used in clinical settings and the home environment is *** proposed device was developed by using an infrared CO_(2)sensor,Arduino mega2560,and a high-resolution display(2.8").Furthermore,two rechargeable batteries(7.6 V,0.99 A)and a secure digital card with a capacity of 16 GB were incorporated to increase the portability and usability of the *** were implemented to measure standard features,namely,inspired CO_(2)(ICO_(2)),end-tidal CO_(2)(EtCO_(2)),and re-spiratory rate(RR).The features of 15 healthy subjects were recorded by using the developed prototype and the standard capnography device(Capnostream^(Tm)20 model CS08798).Validation was performed with Bland-Altman *** revealed that mean differences±standard deviations for the set limits of ICO_(2),EtCO_(2)and RR were 0.29±1.30 millimeters of mercury(mmHg),0.15±1.77 mmHg and 0.40±0.97 breaths per minute(bpm),*** of the differences among device measurements across all features fell within the 95%limits of ***,the developed device may help manage respiratory distress conditions in and outside of a hospital setting.

关键词： Arduino board capnogram carbon dioxide sensor cardiorespiratory monitoring 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

猪的增生性出血性肠病

兽医导刊 1984年第3期 48-52页

作者： R.j.Love D.n.Love m.j.Edwards 林曦

一个最少发病的猪场,在一次增生性出血性肠病(ProIiferative haemorrhagicenteropathy,PHE)爆发的两次发作中,几个繁殖群里的372头成年猪受到了感染,死亡186头。第一次发作时,各种年龄繁殖母猪和公猪都曾发病,表明这是一种有很高易感性... 详细信息

一个最少发病的猪场,在一次增生性出血性肠病(ProIiferative haemorrhagicenteropathy,PHE)爆发的两次发作中,几个繁殖群里的372头成年猪受到了感染,死亡186头。第一次发作时,各种年龄繁殖母猪和公猪都曾发病,表明这是一种有很高易感性的感染。第一次发作猪群里的猪在随后的日子里都不呈现临诊症状,只有以后引入这繁殖群的猪才出现新的临诊病例。抗菌素拌料有预防效果。从病猪的肠粘膜曾分离

关键词：小母猪增生性育成猪青年公猪繁殖群出血性肠病肠疾病

Grain size and temperature effect on the tensile behavior and deformation mechanisms of non-equiatomic Fe(41)mn(25)ni(24)Co8Cr2high entropy alloy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of materials Science & Technology 2020年第7期42卷 190-202页

作者： H.T.jeong W.j.Kim Department of materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul121-791Republic of Korea

The effect of the grain size on the tensile properties and deformation mechanisms of a nonequiatomic Fe(41)mn(25)ni(24)Co8 Cr2 high-entropy alloy was studied in the temperature range between 298 and 1173 K by preparing the samples with three different grain sizes through severe plastic deformation and subsequent annealing:ultrafine(sub)grain size(≤0.5μm),8.1μm and 590.2μ*** the temperature between 298 and773 K,the material with the large grain size of 590.2μm exhibited the largest tensile ductility(57%-82%)due to its high strain hardening associated with mechanical twinning,but it exhibited the lowest strength due to its large grain *** material with the ultrafine(sub)grain size exhibited the lowest tensile ductility(3%-7%)due to a greatly reduced strain hardening ability after severe plastic deformation,but it exhibited the highest strength due to the dislocation strengthening and grain refinement *** tensile testing at temperatures above 973 K,recrystallization occurred in the material with the ultrafine(sub)grains during the sample heating and holding stage,leading to the formation of fine and equiaxed grains with the sizes of 6.8-13.5μ*** deformation behavior of the Fe(41)mn(25)ni(24)Co8 Cr2 with different grain sizes in the high temperature range between 973 and 1173 K,where pseudosteady-state flow was attained in the stress-strain curves,could be explained by considering the simultaneous contribution of grain boundary sliding and dislocation-climb creep to total plastic *** activation energies for plastic flow for the materials with different grain sizes were similar as^199 kj/*** predicting the deformation mechanism,it was important to consider the change in grain size by rapid grain growth or recrystallization during the sample heating and holding stage because grain boundary sliding is a grain-size-dependent deformation *** sample with the ultrafine(sub)grains exhibited the large tensile elongations of 30%-85%due to it

关键词： High entropy alloys Grain size High temperature deformation mechanism Tensile behavior Grain boundary sliding

Diffusion dynamics and characterization of attogram masses in optically trapped single nanoparticles using laser-induced plasma imaging

在线全文

学校读者我要写书评

暂无评论

nano Research 2023年第5期16卷 7470-7480页

作者： Pablo Purohit Francisco j.Fortes javier Laserna UmALASERLAB Departamento de Química AnalíticaUniversidad de MálagaC/Jiménez Fraud 4Malaga 29010Spain niels Bohr Institute University of CopenhagenBlegdamsvej 172100 CopenhagenDenmark

In the present work,a wavelength-selected plasma imaging analysis system is presented and used to track photons emitted from single-trapped nanoparticles in air at atmospheric *** isolated nanoentities were atomized and excited into plasma state using single nanosecond laser *** use of appropriate wavelength filters alongside time-optimized acquisition settings enabled the detection of molecular and atomic emissions in the *** photon detection efficiency of the imaging line resulted in a signal>400 times larger than the simultaneously-acquired dispersive spectroscopy *** increase in sensitivity outlined the evolution of diverse physicochemical processes at the single particle scale which included heat and momentum transfer from the plasma into the particle as wells as chemical *** imaging detection of excited fragments evidenced different diffusion kinetics and time frames for atoms and molecules and their influence upon both the spectroscopic emission readout and fabrication processes using the plasma as a ***,the origin of molecular species,whether naturally-occurring or derived from a chemical reaction in the plasma,could also be studied on the basis of compositional gradients found on the *** of detection for the inspected species ranged from tens to hundreds attograms,thus leading to an exceptional sensing principle for single nanoentities that may impact several areas of science and technology.

关键词： single nanoparticle inspection wavelength-selected laser-induced plasma imaging laser fabrication attogram characterization atomic/molecular diffusion

An Improved Study of Electronic Band Structure and Optical Parameters of X-Phosphides (X=B, Al, Ga, In) by modified Becke-johnson Potential

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2012年第11期58卷 777-784页

作者： masood yousaf m.A. Saeed R. Ahmed m.m. Alsardia Ahmad Radzi mat Isa A. Shaari Physics Department Faculty of ScienceUniversiti Teknologi MalaysiaUTM Skudai81310 JohorMalaysia

We report the electronic band structure and optical parameters of X-Phosphides （X=B, AI, Ga, In） by first-principles technique based on a new approximation known as modified Becke-johnson （roB j）. This potential is considered more accurate in elaborating excited states properties of insulators and semiconductors as compared to LDA and GGA. The present calculated band gaps values of BP, AlP, GaP, and InP are 1.867 eV, 2.268 eV, 2.090 eV, and 1.377 eV respectively, which are in close agreement to the experimental results. The band gap values trend in this study is as： E9 （mBj-GGA/LDA）〉 E9 （GGA）〉 Eg （LDA）. Optical parametric quantities （dielectric constant, refractive index, reflectivity and optical conductivity） which based on the band structure are aiso presented and discussed. BP, AlP, GaP, and InP have strong absorption in between the energy range 4-9 eV, 4-7 ev, 3-7 eV, and 2-7 eV respectively. Static dielectric constant, static refractive index and coefficient of reflectivity at zero frequency, within mBj-GGA, are also calculated. BP, AIP, GaP, and InP show significant optical conductivity in the range 5.2-10 eV, 4.3-8 eV, 3.5- 7.2 eV, and 3.2-8 eV respectively. The present study endorses that the said compounds can be used in opto-electronic applications, for different energy ranges.

关键词： DFT FP-LAPW + lo mBj-GGA optical properties electronic structure

在线全文

学校读者我要写书评

暂无评论

痴呆患者的大脑活检

世界核心医学期刊文摘（神经病学分册） 2005年第12期1卷 19-20页

作者： Warren j.D. Schott j.m. Fox n.C. 夏峰 Dr.Dementia Research Centre Institute of Neurology University College London 8-11 Queen Square London WC1N 3BG United Kingdom

Brain biopsy has an uncertain role in the diagnosis of dementia. Here we report a retrospective analysis of 90 consecutive cerebral biopsies undertaken for the investigation of dementia in adults at a tertiary referral centre between 1989 and 2003. In most cases (90%), biopsy consisted of a right frontal full thickness resection of cortex, white matter and overlying leptomeninges. Fifty-seven per cent of biopsies were diagnostic: the most frequent diagnoses were Alzheimer’s disease (18%), Creutzfeldt-jakob disease (12%) and inflammatory disorders (9%). Other diagnoses in individual patients included Pick’s disease, corticobasal degeneration and other tauopathies, Lewy body dementia, multiple sclerosis, Whipple’s disease, progressive multifocal leucoencephalopathy, cerebral autosomal dominant arteriopathy with subcortical ischaemic leucoencephalopathy, vasculopathies and paraneoplastic encephalopathy. The most frequent biopsy finding in the non-diagnostic group and for the series as a whole (37%) was non-specific gliosis variably affecting both cortex and white matter. Complications (11%) included seizures, intracranial and wound infections, and intracranial haemorrhage; there were no deaths or lasting neurological sequelae attributable to the procedure. no trends in diagnostic yield or complication rate over the course of the series were identified. Information obtained at biopsy determined treatment in 11%. A raised cerebrospinal fluid cell count was the only robust predictor of a potentially treatable (inflammatory) process at biopsy. The constellation of behavioural change, raised CSF protein and matched oligoclonal bands in CSF and serum was associated with non-specific gliosis at biopsy. This series underlines the value of cerebral biopsy in the diagnosis of dementia, and suggests that certain clinical and laboratory features may be useful in guiding the decision to proceed to brain biopsy where a treatable disease cannot be excluded by other means.

关键词：脑活检皮质基底节变性痴呆诊断多发性硬化症阿尔茨海默病脑白质病额叶皮质皮质下炎性疾病寡克隆带

Exposure to cuticular bacteria can alter host behavior in a funnel-weaving spider

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2018年第3期64卷 721-726页

作者： Olivia B.PARKS Krishna S.KOTHAmASU michael j.ZIEmBA morgan BEnnER madison CRISTInZIAnO Serena KAnTZ Daniel LEGER john LI Devanshi PATEL William RABUSE Samantha SUTTOn Amandi WILSOn Priyanka BAIREDDy Aditi A.KAmAT mariah j.CALLAS matthew j.BORGES marysa n.SCALIA Emily KLEnK Gabrielle SCHERER maria m.mARTInez Sarah R.GRUBS nancy KAUFmAnn jonathan n.PRUITT Carl n.KEISER Department of Biological Sciences University of PittsburghPittsburghPA 15260USA Department of Ecology Evolutionand Marine BiologyUniversity of CaliforniaSanta BarbaraCA 93106USA Rice University Academy of Fellows Rice UniversityHoustonTX 77005USA Department of BioSciences Rice UniversityHoustonTX 77005USA

Contact with environmental microbes are arguably the most common species interaction in which any animal *** have noted diverse relationships between hosts and resident microbes,which can have strong consequences for host development,physiology,and behavior. many of these studies focus specifically on pathogens or beneficial microbes,while the benign microbes,of which the majority of bacteria could be described,are often ***,we explore the nature of the relationships between the grass spider Agelenopsis pennsylvanica and bacteria collected from their cuticles in ***,using culture-based methods,we identified a portion of the cuticular bacterial communities that are naturally associated with these ***,we topically exposed spiders to a subset of these bacterial monocultures to estimate how bacterial exposure may alter 3 host behavioral traits:boldness,aggressiveness,and activity *** conducted these behavioral assays 3 times before and 3 times after topical application,and compared the changes observed in each trait with spiders that were exposed to a sterile control *** identified 9 species of bacteria from the cuticles of 36 spiders and exposed groups of 20 spiders to 1 of 4 species of cuticular *** found that exposure to Dermacoccus nishinomiyaensis and Staphylococcus saprophyticus was associated with a lO-fold decrease in the foraging aggressiveness of spiders toward prey in their *** bacterial exposure did not have survival consequences for hosts,these data suggest that interactions with cuticular bacteria,even non- pathogenic bacteria,could alter host behavior.

关键词： Agelenopsis pennsylvanica aggressiveness Araneae cuticular bacteria personality

Preliminary Study on Geographical Variation of Cytochrome b gene and ITS2-rDnA among Populations of Rhynchophorus ferrugineus

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 Agricultural Science and Technology(B) 2011年第2期1卷 189-197页

作者： R. A. A. m. EI-mergawy A. m. A1 Ajlan n. Abdalla V. Vassiliou C. Capdevielle-Dulac D.C.Kontodimas j. F. Silvain m. I. nasr IRD UR 072 Laboratoire Evolution Gdnomes et Spdciation UPR 9034 CNRS Gif-sur-Yvette 91198 France Department of molecular Biology Genetic Engineering and Biotechnology Research Institute （GEBRI） Minoufyia UniversityEl-Sadat City Minoufyia Egypt Department of Arid Land Agriculture College of Agriculture ＆ Food Sciences King Faisal University PO Box 55009 Hofuf31982 Kingdom of Saudi Arabia Department of Genetics Faculty of Agriculture Cairo University Egypt Agricultural Research Institute P. O. Box 22016 1516 Nicosia Cyprus Benaki Phytopathological Institute P. O. Box 51214 Kiffissia Greece Universite Paris-Sud 11 Orsay Cedex 91405 France

The Red Palm Weevil （RPW）, Rhynchophorus ferrugineus （Olivier）, （Coleoptera, Curculionidae, Rhynchophorinae）, is an invasive species that is originated from Southeast Asia. It has invaded middle East, several countries of the mediterranean Basin, Caribbean （Island of Curacao, netherland Antilles）, Lebanon and United States of America （Laguna Beach, Orange County, California） during the last three decades where it attacks palm trees. This study investigated the geographical variation among geographic populations of RPW collected from twelve invaded countries using cytochrome b （Cytb） and ITS2 partial sequences. The comparison among the Cytb sequences resulted in three different haplotypes designated as HB 1 to HB3. The three haplotypes were subdivided into two phylogenetic groups according to their geographic positions：（1） the ＂multi-Continent＂ group containing HB 1 haplotype detected in eight populations belonging to three different Continents such as Africa-Egypt, Asia-Kingdom of Saudi Arabia and Turkey and Europe-Spain, Italy, Greece, Cyprus and France, and （2） the ＂Asian＂ group includes four populations from Iran （harboring HB2 haplotype）, Pakistan, UAE, and Oman （harboring HB3 haplotype）. This mitochondrial pattern of genetic diversity suggests that the tested RPW populations subdivided genetically into different sub-populations under the influence of genetic drift. According to these results we concluded that the twelve studied RPW populations are originating from different source populations in the RPW area of origin.

关键词： Cytochrome b ITS2 Red Palm Weevil invasive species geographical variation.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

气候场重建方法的比较——以欧洲为例

沙漠与绿洲气象 2010年第1期4卷 59-60页

作者： Riedwyl n Küttel m Luterbacher j Wanner H 依风

1两种气候场重建方法的历史回顾温度变幅对更好地了解过去温度的演变和变化至关重要。基于古气候资料重建过去温度的变化能够深刻阐释气候的强迫作用。

关键词：重建方法气候场欧洲强迫作用气候资料全球尺度温度历史