检索结果-南通市图书馆

Journal of Forestry Research 2019年第2期30卷 545-553页

作者： Daniela Granato-Souza eduardo adenesky-filho Karin Esemann-Quadros Postgraduate Program in Forestry Regional University of Blumenau-FURB Department of Biological Sciences University of Joinville Region-UNIVILLE

Nectandra is one of the most representative genera of Lauraceae in the subtropical Atlantic Forest of Brazil. The objective of this work was to study the dendrochronological potential of Nectandra oppositifolia Nees and Mart. from two sites in Santa Catarina State in southern Brazil. A tree-ring chronology of 34 trees was developed. The time span ranged from 1843 to 2013. The oldest and youngest trees were 171 and 47 years-old and the average length of the series was 103 years. Average diameter and annual increment were 20.64 cm and0.74 mm a-1; diameter and age were unrelated. The species has good dendrochronological potential with an intercorrelation of 0.61 between sites, indicating the existence of a synchronous pattern in the development of the trees. The climate response of the species could be seen by negative tree growth effects for previous hot and current rainy growth seasons.

关键词： Climate response Dendroclimatology Atlantic forest Growth rings Lauraceae

Metamorphic disturbances of magnetite chemistry and the Sm-Nd isotopic system of reworked Archean iron formations from NE Brazil

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2022年第5期13卷 227-241页

作者： Joice Dias de Moraes Pedro Cordeiro eduardo Abrahão filho Juliana Rezende Oliveira Carlos Victor Rios da Silva filho Instituto de Geociências Universidade de Brasília(UnB)70910-900 BrasíliaDFBrazil Department of Mining Engineering Pontifical Catholic University of Chile7820436 SantiagoChile

Iron formations are valuable archives of sedimentary conditions and post-depositional ***,geochemical proxies commonly used to determine genetic characteristics can be variably modified during metamorphism and deformation,hampering their use as records of regional geological *** work focuses on strongly reworked magnetite-quartz-rich rocks from the São Josédo Campestre Massif,one of the oldest fragments of preserved crust in South *** genetic classification of these magnetite-quartz-rich rocks is not straightforward because primary assemblages and textures were variably modified by granulite facies metamorphism during a regional Paleoproterozoic migmatization *** address genetic ambiguities,we analyzed their magnetite and pyroxene chemistry,wholerock geochemistry,and Sm-Nd *** chemistry indicates that pyroxene-poor iron formations(Type B)are low in trace elements such as Ti,Al,V,and Mn,suggesting a chemical similarity to iron formations *** contrast,magnetites from pyroxene-enriched Type A iron formations are rich in trace elements and more akin to magnetite crystallized from higher temperature systems,such as skarn and ***^(147)Sm/^(144)Nd of these rocks show substantial variation even at the outcrop scale,indicating a locally-controlled,highly heterogeneous mixture of Archean,Paleoproterozoic,and Neoproterozoic ***,our geochemical tools point out to heterogenous signatures of these magnetitequartz rocks and proxies compatible with both low and high-temperature conditions and age of deposition spanning sources from the Archean to the *** interpret that the studied São Josédo Campestre magnetite-quartz rocks represent Archean iron formations with original magnetite chemistry and isotopic signatures variably modified by metamorphism and by at least one deformation-related hydrothermal *** results contrast with similar examples from China and Greenland where iron formation

关键词： Metamorphic disturbances of magnetite chemistry and the Sm-Nd isotopic system of reworked Archean iron formations from NE Brazil

Optimizing Nitrogen Use Efficiency for No-Till Corn Production by Improving Root Growth and Capturing NO_(3)-N in Subsoil

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2016年第4期26卷 474-485页

作者： eduardo F. CAIRES Renato ZARDO filho Gabriel BARTH Helio A. W. JORIS Department of Soil Science and Agricultural Engineering State University of Ponta Grossa Ponta Grossa 84030-900 Green Circle Growers 51051 US FIighway 20 Oberlin OH 44074 ABC Foundation Research and Agricultural Development Castro 84165-700

Subsoil acidity restricts root growth and reduces crop yields in many parts of the world. More than half of the fertilizer nitrogen(N) applied in crop production is currently lost to the environment. This study aimed to investigate the effect of gypsum application on the efficiency of N fertilizer in no-till corn(Zea mays L.) production in southern Brazil. A field experiment examined the effects of surface-applied gypsum(0, 5, 10, and 15 Mg ha^(-1)) and top-dressed ammonium nitrate(NH_4NO_3)(60, 120, and 180 kg N ha^(-1)) on corn root length, N uptake, and grain yield. A greenhouse experiment was conducted using undisturbed soil columns collected from the field experiment site to evaluate NO_3-N leaching, N uptake, and root length with surface-applied gypsum(0 and 10 Mg ha^(-1)) and top-dressed NH_4NO_3(0 and 180 kg N ha^(-1)). Amelioration of subsoil acidity due to gypsum application increased corn root growth,N uptake, grain yield, and N use efficiency. Applying gypsum to the soil surface increased corn grain yield by 19%–38% and partial factor productivity of N(PFPN) by 27%–38%, depending on the N application rate. Results of the undisturbed soil column greenhouse experiment showed that improvement of N use efficiency by gypsum application was due to the higher N uptake from NO_3-N in the subsoil as a result of increased corn root length. Our results suggest that ameliorating subsoil acidity with gypsum in a no-till corn system could increase N use efficiency, improve grain yield, and reduce environmental risks due to NO_3-N leaching.

关键词： ammonium nitrate grain yield N uptake nitrate leaching partial factor productivity of nitrogen soil acidity

Hadronic spectra from deformed AdS backgrounds

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2020年第6期44卷 109-122页

作者： eduardo Folco Capossoli Miguel Angel Martín Contreras Danning Li Alfredo Vega Henrique Boschi-filho Instituto de Física Universidade Federal do Rio de Janeiro21.941-972-Rio de Janeiro-RJ-Brazil Departamento de Física/Mestrado Profissional em Práticas da Educação Básica(MPPEB) Colégio Pedro II20.921-903-Rio de Janeiro-RJ-Brazil Instituto de Física y Astronomía Universidad de ValparaísoA.Gran Bretaña 1111ValparaísoChile Department of Physics and Siyuan Laboratory Jinan UniversityGuangzhou 510632China

Because of the presence of modified warp factors in metric tensors,we use deformed AdS5 spaces to apply the AdS/CFT correspondence to calculate the spectra for even and odd glueballs,scalar and vector mesons,and baryons with different *** the glueball cases,we derive their Regge trajectories and compare them with those related to the pomeron and the *** the scalar and vector mesons,as well as baryons,the determined masses are compatible with the *** particular,for these hadrons we found Regge trajectories compatible with another holographic approach as well as with the hadronic spectroscopy,which present an universal Regge slope of approximately 1.1 GeV^2.

关键词： hadronic spectra AdS/QCD model Regge trajectories

Co-Simulation of an SRG Wind Turbine Control and GPRS/EGPRS Wireless Standards in Smart Grids

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 656-663页

作者： Andre Luiz de Oliveira Carlos eduardo Capovilla Ivan Roberto Santana Casella JoséLuis Azcue-Puma Alfeu J.Sguarezi filho University of Sao Paulo Sao Paulo 05508-010Brazil Federal University of ABC Santo Andre 09210-580Brazil

Wind energy can be considered a push-driver factor in the integration of renewable energy sources within the concept of smart *** its full deployment,it requires a modern telecommunication infrastructure for transmitting control signals around the distributed generation,in which,the wireless communication standards stand out for employing modern digital modulation and coding schemes for error correction,in order to guarantee the power plant *** some developing countries,such as Brazil,the high penetration of commercial mobile wireless standards GPRS and EGPRS(based on GSM technology)have captivated the interests of the energy sector,and they now seek to perform remote monitoring and control *** this context,this article presents a comparative performance analysis of a wireless control system for a wind SRG,when a GPRS or EGPRS data service is *** system performance is analyzed by co-simulations,including the wind generator dynamics and the wireless channel *** satisfactory results endorse the viability and robustness of the proposed system.

关键词： General packet radio service(GPRS)/enhanced GPRS(EGPRS) smart grids switched reluctance generator(SRG) wind energy wireless communications

Management of hepatitis C in patients with chronic kidney disease

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第2期21卷 408-422页

作者： Roberto J Carvalho-filho Ana Cristina CA Feldner Antonio eduardo B Silva Maria Lucia G Ferraz Division of Gastroenterology Hepatology SectionFederal University of Sao PauloSao PauloSP 04023-900Brazil

Hepatitis C virus(HCV) infection is highly prevalent among chronic kidney disease(CKD) subjects under hemodialysis and in kidney transplantation(KT) recipients, being an important cause of morbidity and mortality in these patients. The vast majority of HCV chronic infections in the hemodialysis setting are currently attributable to nosocomial transmission. Acute and chronic hepatitis C exhibits distinct clinical and laboratorial features, which can impact on managementand treatment decisions. In hemodialysis subjects, acute infections are usually asymptomatic and anicteric; since spontaneous viral clearance is very uncommon in this context, acute infections should be treated as soon as possible. In KT recipients, the occurrence of acute hepatitis C can have a more severe course, with a rapid progression of liver fibrosis. In these patients, it is recommended to use pegylated interferon(PEG-IFN) in combination with ribavirin, with doses adjusted according to estimated glomerular filtration rate. There is no evidence suggesting that chronic hepatitis C exhibits a more aggressive course in CKD subjects under conservative management. In these subjects, indication of treatment with PEG-IFN plus ribavirin relies on the CKD stage, rate of progression of renal dysfunction and the possibility of a preemptive transplant. HCV infection has been associated with both liver disease-related deaths and cardiovascular mortality in hemodialysis patients. Among those individuals, low HCV viral loads and the phenomenon of intermittent HCV viremia are often observed, and sequential HCV RNA monitoring is needed. Despite the poor tolerability and suboptimal efficacy of antiviral therapy in CKD patients, many patients can achieve sustained virological response, which improve patient and graft outcomes. Hepatitis C eradication before KT theoretically improves survival and reduces the occurrence of chronic graft nephropathy, de novo glomerulonephritis and post-transplant diabetes mellitus.

关键词： Hepatitis C virus Chronic kidney disease End-stage

Qualification and validation test methodology of the open-source CubeSat FloripaSat-I

维普期刊数据库评论

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 Systems Engineering and Electronics 2020年第6期31卷 1230-1244页

作者： MARCELINO Gabriel Mariano filho Edemar Morsch MARTINEZ Sara Vega DE MATTOS AndréMartins Pio SEMAN Laio Oriel SLONGO Leonardo Kessler BEZERRA eduardo Augusto Department of Electrical Engineering Federal University of Santa CatarinaFlorianópolis 88040-900Brazil SENAI Institute of Innovation in Embedded Systems Florianópolis 88054-700Brazil School of Sea Science and TechnologyUniversity of Vale do ItajaíItajaí88302-901Brazil

The FloripaSat-I project consists of an initiative from the Federal University of Santa Catarina(UFSC),in Brazil,to train students to design,test and integrate innovative space *** group just developed its first open-source CubeSat,the FloripaSat-I,which aims to empower students to develop space systems through a practical approach,where they have full control of the design and test of a real *** project has already gone through all the stages of a CubeSat mission prior to the launching and operation stages.A prototype of the satellite,as well the engineering models 1 and 2(EM-I and EM-II)were *** expertise provided by the engineering models allows the development of a functional flight model(FM).This paper presents the validation and qualification tests that pass various FloripaSat-I models,from the engineering model to the flight *** stages of the project are described,the tests performed in each phase,as well as the lessons ***,this paper serves as a guidance for other university teams that want to test their own CubeSats,as well as teams that want to use the open-source hardware and software left as heritage by this project.

关键词： embedded system nanosatellite cubesats test methodology

Posterior partially edentulous jaws, planning a rehabilitation with dental implants

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2015年第1期3卷 65-76页

作者： Douglas R Monteiro Emily V F Silva eduardo P Pellizzer Osvaldo Magro filho Marcelo C Goiato Department of Dental Materials and Prosthodontics Araçatuba Dental SchoolUniv Estadual Paulista(UNESP)São Paulo 16015-050Brazil

AIM: To discuss important characteristics of the useof dental implants in posterior quadrants and the rehabilitation planning. METHODS: An electronic search of English articles was conducted on MEDLINE(PubM ed) from 1990 up to the period of March 2014. The key terms were dental implants and posterior jaws, dental implants/treatment planning and posterior maxilla, and dental implants/treatment planning and posterior mandible. No exclusion criteria were used for the initial search. Clinical trials, randomized and non randomized studies, classical and comparative studies, multicenter studies, in vitro and in vivo studies, case reports, longitudinal studies and reviews of the literature were included in this review. RESULTS: One hundred and fifty-two articles met the inclusion criteria of treatment planning of dental implants in posterior jaw and were read in their entirety. The selected articles were categorized with respect to their context on space for restoration, anatomic considerations(bone quantity and density), radiographic techniques, implant selection(number, position, diameter and surface), tilted and pterygoid implants, short implants, occlusal considerations, and success rates of implants placed in the posterior region. The results derived from the review process were described under several different topic headings to give readers a clear overview of the literature. In general, it was observed that the use of dental implants in posterior region requires a careful treatment plan. It is important that the practitioner has knowledge about the theme to evaluate the treatment parameters. CONCLUSION: The use of implants to restore the posterior arch presents many challenges and requires a detailed treatment planning.

关键词： Dental implants Mandible Maxilla Edentulous jaw Treatment

Glutamine and glutamate supplementation raise milk glutamine concentrations in lactating gilts

维普期刊数据库评论

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 Animal Science and Biotechnology 2012年第1期3卷 25-31页

作者： Helena Emilia CCC Manso Helio C Manso filho Luiz E de Carvalho Marianne Kutschenko eduardo T Nogueira Malcolm Watford Department of Animal Sciences Rural Federal University of PernambucoRecifePE52171-900Brazil Departament of Animal Sciences Federal University of CearáFortalezaCE60020-181Brazil Ajinomoto do Brazil S oPauloSP04015-001Brazil Department of Nutritional Sciences Rutgers UniversityNew BrunswickNJ08901USA.

Glutamine is the most abundant amino acid in milk, and lactation is associated with increased glutamine utilization both for milk synthesis and as a fuel for the enlarged small intestine. A number of recent studies have indicated that lactation is accompanied by a mild catabolic state in which skeletal muscle proteins are degraded to provide amino acids that are used to synthesize additional glutamine. In this study we tested the hypothesis that supplemental L-glutamine or the commercially available glutamine supplement Aminogut （2.5% by weight mixed into daily feed） provided to gilts from 30 days prior to parturition until 21 days post-parturition would prevent a decrease in skeletal muscle glutamine while increasing the glutamine content of the milk. Muscle glutamine content decreased （P 〈 0.05） in control animals during lactation but this was prevented by supplementation with either L-glutamine or Aminogut. In this study, neither lactation nor supplementation had any effect on plasma glutamine or glutamate content. Free glutamine, and the total glutamine plus glutamate concentrations in milk from the control and the Aminogut group rose （P 〈 0.05） during the first 7 days of lactation, with milk concentrations in the L-glutamine supplemented group showing a similar trend （P = 0.053）. Milk glutamate remained constant between day 7 and 21 of lactation in the control and L-glutamine supplemented groups, but by day 21 of lactation the free glutamine, glutamate, and glutamine plus glutamate concentrations in milk from Aminogut-treated gilts were higher than those of control gilts. Thus dietary glutamine supplementation can alleviate the fall in intramuscular glutamine content during lactation in gilts, and may alleviate some of the catabolic effects of lactation. Furthermore, the increased milk glutamine content in the supplemented gilts may provide optimum nutrition for piglet development.

关键词： glutamate glutamine lactation milk pig skeletal muscle

Adipose-derived stem cells and knee osteoarthritis:New perspectives,old concerns

在线全文

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2024年第11期15卷 1001-1006页

作者： eduardo B de Sousa JoséPaulo A Gabbi filho Vinicius S Gameiro Leandra S Baptista Department of General and Specialized Surgery Fluminense Federal UniversityRio de Janeiro 24070-090Brazil Department of Orthopaedics Quinta D’Or HospitalRio de Janeiro 20941-150Brazil Duque de Caxias Campus Prof Geraldo Cidade Federal University of Rio de JaneiroRio de Janeiro 25065-050Brazil

In this editorial,we comment on the paper by Muthu et al published in the recent issue of the *** editorial review focusses on the use of adipose-derived stem cells(ADSCs)in knee osteoarthritis *** discuss the differences between the stromal vascular fraction and microfragmented adipose tissue and highlight the results of clinical studies comparing both treatments and the use of hyaluronic acid,platelet-rich plasma,and bone marrow aspirate *** use of expanded ADSCs is also discussed;moreover,concerns regarding treatment with ADSCs,particularly the heterogeneity of published studies and the need to standardize protocols to explore clinical potential is explored.

关键词： Adipose tissue Adipose-derived stem cells Stromal vascular fraction Knee Osteoarthritis Microfragmented adipose tissue