检索结果-南通市图书馆

journal of Minerals and Materials Characterization and Engineering 2024年第2期12卷 91-99页

作者： Oluwole Oladele Ayodele Adedeke Olajesu Olanrewaju samuel Olusunle Department of Metallurgical and Materials Engineering Federal University of Technology Akure Ondo State Nigeria Engineering Materials Development Institute NASENI Akure Ondo State Nigeria Department of Materials Science and Engineering Iowa State University Ames IA USA NASENI Abuja Nigeria

This research considered the effect of non-natural aging on the microstructural characteristics and mechanical properties of as-cast aluminum 6063 alloys. The samples were developed through a sand casting process and machined into tensile and impact test samples before carrying out solution heat treatment at 550?C (0.83 Tm) on two parts of the samples while retaining one part as the control. The two parts were further divided into sets denoted A and B and were aged at 180?C (0.27 Tm) and 160?C (0.24 Tm), respectively, for 12 hours. The results showed that sample A has the optimal yield strength and ultimate tensile strength of 192 and 206 MPa, respectively. Likewise, the sample gave the highest impact strength value of about 9.63 j/mm2. The observed results were supported by the optical micrograph, which revealed that the sample has evenly dispersed precipitates in its microstructure. This is deemed responsible for the observed increase in strength of the sample.

关键词： Aluminum Alloy Non-Natural Ageing Mechanical Properties Microstructural Features

Global wild rice germplasm resources conservation alliance:World Wild-Rice Wiring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第4期17卷 516-518页

作者： Xiaoming Zheng Disna Ratnasekera jiayu Fan Robert j.Henry Beng-Kah Song Kenneth M.Olsen Bal Krishna joshi Maria Celeste N.Banaticla-Hilario Tonapha Pusadee Adane Getachew Melaku Yeyinou Laura Estelle Loko Koukham Vilayheuang Gavers K.Oppong samuel Aduse Poku Peterson W.Wambugu Song Ge Aldo Merotto junior Ohn Mar Aung Ramaiah Venuprasad Ajay Kohli Wenbin Zhou Qian Qian National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Sanya National Research Institute of Breeding in Hainan Chinese Academy of Agricultural SciencesBeijing 100081China International Rice Research Institute DAPO Box 7777Metro Manila 4031Philippines Department of Agricultural Biology Faculty of AgricultureUniversity of RuhunaMatara 81000Sri Lanka Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya CityHainan Province 572024China Hainan University Haikou 570228China ARC Centre of Excellence for Plant Success in Nature and Agriculture University of QueenslandBrisbaneQLD4072Australia School of Science Monash University Malaysia47500 Bandar SunwaySelangor 47500Malaysia Department of Biology Washington University in St.LouisSt.LouisMO 63130-4899USA National Agriculture Genetic Resources Center(Genebank) KhumaltarPO Box 3055KathmanduNepal Plant Biology Division Insttute of Biological SciencesUniversity of the Pilippines Los BanosLos BanosLaguna 4031Philippines Division of Agronomy Department of Plant and Soil SciencesFaculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand Bio and Emerging Technology Institute Addis Ababa 1165Ethiopia National University of Sciences TechnologiesEngineering and Mathematics(UNSTIM)Dassa-ZouméBP 14Benin National Genebank Rice and Cash Crops Research CenterNAFRIVientiane 0605Lao PDR Plant Sciences and the Bioeconomy Rothamsted ResearchHarpenden AL52JQUK UK Future Food Beacon of Excellence and School of Biosciences and University of Nottingham Nottingham LE125RDUK Department of Plant and Environmental Biology University of GhanaAccraGhana Kenya Agricultural and Livestock Research Organization Genetic Resources Research InstituteNairobi 00200Kenya Institute of Botany Chinese Academy of SciencesBeijing 100093China Federal University of Rio Grande do Sul UFRGSPorto Alegre 91501-970RSBrazil Department of Agricultur

Wild relatives of crop are key genetic resources serving as diversity reservoirs for crop improvement under changing ***(Oryza sativa)is one of the most important crops in the world,providing staple food for half of the world's *** rice is thus a critical germplasm resource for sustained global food security,ensuring high production yields,improved quality,and stress resistance in the face of climate *** rice is closely related to domesticated rice and has a rich genetic diversity and exceptional adaptability to extreme *** has played a pivotal role in the history of rice hybridization and has become a key resource for rice breeding *** identification of wild-type cytoplasmic male sterility resources paved the way for the achievement of the“three lines”goal in hybrid rice,leading to a significant increase in rice *** addition,the use of resistance alleles found in wild rice is making rice production more resilient to losses caused by environmental ***,wild rice germplasm resources are threatened due to habitat destruction and other anthropogenic *** the same time,the lack of centralized distribution of wild rice has hampered the sharing of basic information on wild rice resources and the utilization and conservation of wild rice in each country,as well as collaboration among scientists.

关键词： germplasm breeding crops

Rituximab as a treatment for human immunodeficiency virusassociated nemaline myopathy:What does the literature have to tell us?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World journal of Clinical Cases 2022年第4期10卷 1454-1456页

作者： jucier Gonçalves júnior samuel Katsuyuki Shinjo Division of Rheumatology São Paulo UniversitySão Paulo 01246-903Brazil

We presented a letter about a case of a 37-year-old Black female with a history of human immunodeficiency virus and an undetectable viral *** was evaluated with weakness in the scapular(grade III)and pelvic girdles(grade II),elevation of creatine phosphokinase levels and muscle biopsy compatible with nemaline *** was treated with rituximab showing improvement of the condition.

关键词： Case report Human immunodeficiency virus Nemaline myopathy Rituximab Rheumatology Therapy

Disease exacerbation is common in inflammatory bowel disease patients treated with immune checkpoint inhibitors for malignancy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World journal of Clinical Cases 2022年第6期10卷 1787-1794页

作者： samuel j S Rubin Tatiana Balabanis john Gubatan Aida Habtezion Division of Gastroenterology and Hepatology Department of MedicineStanford University School of MedicineStanfordCA 94305United States

BACKGROUND Colitis is a known potential toxicity of immune checkpoint inhibitors(ICIs).Studies evaluating the risk of disease exacerbation following ICI treatment in patients with pre-existing inflammatory bowel disease(IBD)are *** To assess the clinical characteristics of IBD patients treated with ICIs and determine prevalence of subsequent IBD *** We conducted a retrospective cohort study of all patients in the Stanford Research Repository database with pre-existing IBD who were exposed to *** The prevalence of IBD exacerbation following ICI was 36.8% amongst 19 patients meeting inclusion *** with exacerbations had more gastrointestinalrelated hospitalizations(4 of 7)than patients without exacerbations(0 of 12;P=0.0090).CONCLUSION The prevalence of IBD exacerbations following ICI was higher than reported rates of ICI-induced colitis and diarrhea in the general population and was associated with hospitalization.

关键词： Inflammatory bowel disease Immune checkpoint inhibitors Immunotherapy Malignancy

Electrocardiographic markers of cardiac resynchronization therapy response:delayed time to intrinsicoid deflection onset in lateral leads

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 Geriatric Cardiology 2022年第1期19卷 21-30页

作者： Rubén KA Tapia-Orihuela S Michael Gharacholou samuel j Asirvatham Freddy Del-Carpio Munoz Department of Medicine Universidad Nacional Mayor de San MarcosFacultad de Medicina de San FernandoLimaPeru Department of Cardiovascular Diseases Mayo ClinicJacksonvilleFLUSA Department of Cardiovascular Diseases Mayo ClinicRochesterMNUSA

Cardiac resynchronization therapy(CRT)has emerged as an important intervention for patients with heart failure(HF)with reduced ejection fraction and delayed ventricular *** these patients,CRT has demonstrated to improve quality of life,promote reverse left ventricular(LV)remodeling,reduce HF hospitalizations,and extend ***,despite advancements in our understanding of CRT,a significant number of patients do not respond to this *** invasive and non-invasive parameters have been assessed to predict response to CRT,but the electrocardiogram(ECG)has remained as the prevailing screening method albeit with ***,an accurate,simple,and reproducible ECG marker or set of markers would dramatically overcome the current *** describe the clinical utility of an old ECG parameter that can estimate ventricular activation delay:the onset to intrinsicoid deflection(ID).Based on the concept of direct measurement of ventricular activation time(intrinsic deflection onset),time to ID onset measures on the surface ECG the time that the electrical activation time takes to reach the area subtended by the corresponding surface ECG *** on this principle,the time to ID on the lateral leads can estimate the delay activation to the lateral LV wall and can be used as a predictor for CRT response,particularly in patients with non-specific intraventricular conduction delay or in patients with left bundle branch block and QRS<150 *** aim of this review is to present the current evidence and potential use of this ECG parameter to estimate LV activation and predict CRT response.

关键词： deflection intrinsic synchronization

4D imaging of void nucleation,growth,and coalescence from large and small inclusions in steel under tensile deformation

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2022年第28期123卷 168-176页

作者： Yi Guo Timothy L.Burnett samuel A.McDonald Michael Daly Andrew H.Sherry Philip j.Withers Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Henry Royce Institute Department of MaterialsUniversity of ManchesterM139PLUK European Synchrotron Radiation Facility(ESRF) 6 rue J Horowitz38000 GrenobleFrance National Nuclear Laboratory Chadwick HouseBirchwood ParkWarringtonWA36AEUK

Samples of SA508 grade 3 nuclear pressure vessel ferritic steel were subjected to tensile straining whilst being simultaneously imaged in 3D in real time using high resolution,high frame rate time-lapse synchrotron computed tomography(CT).This enabled direct observation of void development from nucleation,through growth to coalescence and final failure validating many inferences made post-mortem or by theoretical models,as well as raising new *** sparse,large inclusions were found to nucleate voids at essentially zero plastic strain(consistent with zero interfacial strength);these became increasingly elongated with *** contrast,a high density of small spherical voids were found to nucleate from the sub-micron cementite particles at larger strains(>200%)only in the centre of the necked(high triaxiality)*** interfacial strength approaching 2100 MPa was inferred and soon after their nucleation,these small voids coalesce to form internal microcracks that lead to the final failure of the *** surprisingly,under these conditions of generally low triaxial constraint the large voids are simply cut across and appear to play no significant role in determining the final *** implications of these results are discussed in terms of ductile fracture behaviour and the Gurson model for ductile fracture.

关键词： Void growth Ductile fracture Synchrotron X-ray tomography 4D imaging Bainitic steel

Reflections on the prevalence of human leukocyte antigen-B27 and human leukocyte antigen-B51 co-occurrence in patients with spondylarthritis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World journal of Clinical Cases 2022年第23期10卷 8422-8424页

作者： jucier Gonçalves júnior Percival Degrava Sampaio-Barros samuel Katsuyuki Shinjo Division of Rheumatology São Paulo UniversitySão Paulo 01246-903São PauloBrazil

We performed a literature mini-review of the clinical profile of patients with spondylarthritis who are also human leukocyte antigen(HLA)-*** seems to us that patients with HLA-B27 and HLA-B51 are more common in men,Asians and between the third and ninth decades of *** are more likely to develop peripheral joint conditions,with cutaneous manifestations(e.g.,oral ulcers)and ***,more robust epidemiological studies with more accurate methodology and multicenter locations are needed to better map the role of the interaction between HLA-B51 in patients with spondylarthritis.

关键词： HLA-B27 HLA-B51 Ankylosing spondylitis Spondylarthritis Human leukocyte antigen

The acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei Thanh Ha samuel Yoffe Lance Labun Stephen Milton Edward McCary Michael M.Spinks Hernan j.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano jose A.Franco-Altamirano Martin L.Ringuette Erhart Gaul Scott V.Luedtke Ganesh Tiwari Bernhard Ersfeld Enrico Brunetti Hartmut Ruhl Todd Ditmire Sandra Bruce Michael E.Donovan Michael C.Downer Dino A.jaroszynski Bjorn Manuel Hegelich University of Texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-Maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge

Antipredatory call behavior of lapwing species in an Afrotropical environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Avian Research 2023年第4期14卷 630-639页

作者： Fatima R.james Chioma I.Okafor samuel T.Osinubi Shiiwua A.Manu samuel Ivande Taiwo C.Omotoriogun A.p.leventis ornithological research institute university of josp.o.box 13404josplateau statenigeria eden creation care initiative rennajj fish farm p.o.box 7173josplateau statenigeria fitzpatrick institute of african ornithology university of cape towncape townsouth africa department of zoology university of josjosplateau statenigeria biotechnology unit department of biological scienceselizade universityp.m.2.002ilara-mokinondo statenigeria natural history museum university of oslop.o.box 1172 blindern0318 oslonorway

Predation is an important source of natural selection on prey species and has resulted in adaptations such as antipredator vocal signals,which can alert others to the presence of predators and solicit cooperative *** vocal alarm signals of birds have been well studied,they are poorly known in tropical African *** address this lack of information,the antipredatory signals and responses of two lapwings(Wattled Lapwing Vanellus senegallus and Spur-winged Lapwing Vanellus spinosus)to potential predators were investigated using data collected from focal observation,distance measurements,focal recordings,and playback *** lapwing calls elicited to predators were classified as alarm or mobbing calls based on whether the calls elicited alert behavior or attack from other *** linear analysis(DLA)was used to compare the time and frequency parameters of the call types measured in Raven ***,lapwings’responses to intruders,alert and start distance,time of day,and latency,as well as the effects of flock size and distance to cover were *** 48%of all calls was correctly classified by *** best predictors of call type for the lapwings were maximum frequency and high *** alarm and mobbing calls were elicited by African Wattled Lapwings to dogs and *** calls were elicited to intruders by the Spur-winged *** distance was positively associated with start distance,and differed between morning and evening in both *** scarce information from tropical Africa,this study put in perspective vocal and antipredator behavior of lapwing species in Africa.

关键词： Acoustic Alarm calls Lapwings Mobbing calls Vocal signals

Dynamics of sexual development in teleosts with a note on Mugil cephalus

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2022年第5期7卷 507-518页

作者： j.Logamanya Tilak Angeline samuel A.Kalarani R.Moses Inbaraj Endocrinology Unit Department of ZoologyMadras Christian CollegeTambaramChennai600059India

The process of sex determination(SD)and sex differentiation(Sd)with associated sex-specific behaviour in teleosts is brought about by genetic factors and environmental factors under the influence of chemical *** is initiated by inherited genes,which in turn influence Sd by the production of *** understand the plasticity of SD in fishes,the functional role of genes must be clearly *** early development,the dimorphic expression of male and female are mediated by the differentially sexualized *** mammals,SD region(SDR)on the Y chromosome(SRY)can be considered as male-specific copy of SOX3 and in the absence of SRY in teleosts suggests SD might be regulated by alternate ***(doublesex/mab)-related genes,AMH(anti-mullerian hormone),TGF-b(transforming growth factor beta),GSDF(gonadal soma derived growth factor)and other genes(around 18)located in chromosomes of teleosts are found to be responsible for *** SD gene,sdY(sexually dimorphic on the Y chromosome)has been detected in more than 15 salmonid species,and in medaka and tilapia SD system is governed by heterogametic *** mullet,Mugil cephalus Dor et *** 27 SDR genes and suggested to be potential candidate genes for *** whole-genome sequencing data were produced from mullet and assembled into a draft genome sequence in which>30 loci are potentially associated with *** analysis is required to know the involvement of each sex-biased gene for its functional influence on *** attempted to know the sex-linkage group in tilapia and found that 2 linkage group ***1 and LG22 show SD loci,whereas in mullet it was documented that LG8 is the SD *** study with all male population(YY)or knockout of male marker gene,might give conclusive understanding on SD in *** review highlights the absence of genomic understanding of SD and SDR genes for futuristic direction of research.

关键词： Sex determination SRY sdY Sex differentiation Mugil cephalus