检索结果-南通市图书馆

Journal of Integrative Agriculture 2018年第12期17卷 2724-2733页

作者： TIAN Zhong-ling Munawar Maria Eda Marie Barsalote pablo Castillo ZHENG Jing-wu Laboratory of Plant Nematology Institute of Biotechnology College of Agriculture and Biotechnology Zhejiang University Institute for Sustainable Agriculture(IAS) Spanish National Research Council (CSIC) Campus de Excelencia Internacional Agroalimentario Key Lab of Molecular Biology of Crop Pathogens and Insects Ministry of Agriculture

The rice root-knot nematode Meloidogyne graminicola is a severe pest of rice. In China, it was first reported from Hainan Province, and later from several other provinces. In the present study, a rice root-knot nematode population found from the rice cultivation areas of Zhejiang Province, China is characterized via molecular analysis using internal transcribed spacer(ITS) and cytochrome c oxidase subunit Ⅱ(coxⅡ)-16 S rRNA genes and scanning electron microscopy(SEM) observations of males and the second-stage juveniles. Morphometric data and molecular sequence comparisons for all M. graminicola populations occurring in China are also provided. The overall morphology of M. graminicola found in Zhejiang match well with the original description, though males have a slightly longer body and stylet, and a shorter tail, while the second-stage juvenile is also slightly longer than in the original description. This is the first report of M. graminicola from Zhejiang. Phylogenetic studies based on coxⅡ suggest that all the Chinese populations belong to Type B. This study expands knowledge of the increasing distribution and phylogenetic relationships of M. graminicola that occur in China.

关键词： Meloidogyne graminicola morphology morphometric molecular rice rDNA cytochrome c oxidase subunit Ⅱ (coxⅡ) China

Shade shelters increase survival and photosynthetic performance of oak transplants at abandoned fields in semi-arid climates

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2013年第1期24卷 23-28页

作者： Claudia González-Salvatierra Ernesto Iván Badano Joel Flores Juan pablo Rodas División de Ciencias Ambientales Instituto Potosino de Investigación Científica y TecnológicaA.C.Camino a la Presa San José 2055C.P. 78216San Luis PotosíS.L.P.México.

Forest restorations conducted in semiarid, seasonally dry climates must deal with the intense drought stress that affects tree seedlings during the dry season. Although this water deficit is the most commonly invoked source of mortality for seedlings, several other environmental factors may also preclude survival of transplants. For instance, it has been widely reported that excessive light reduces the efficiency of the photosynthetic apparatus, hence decreasing plant survival, but most seedling transplants in deforested areas are conducted under these light conditions. This study is focused in determining whether excessive light affects the photosynthetic performance and survival of Quercus coccolobifolia, a Mexican oak species, when their seedlings are transplanted in semiarid deforested areas. Further, this study tests the possibility of using artificial shade shelters to improve the ecophysiological performance and survival of seedlings. Oak seedlings were transplanted under full sunlight conditions and beneath artificial shade shelters of two different colors： white and black. To reduce water stress, and hence isolate the effects of light treatments, a drip irrigation system was implemented at each experimental plot. Seedling survival was monitored weekly for 128 days and photosynthetic performance was assessed by measuring chlorophyll fluorescence at three opportunities during the experiment. Sun-exposed seedlings showed lower photosynthetic performance and survival rates than those beneath shelters of both colors. These results suggest that sunlight damage can reduce seedling survival when they are transplanted in exposed sites, and that shade shelters can improve the success of forest restoration programs in semiarid climates.

关键词： chlorophyll fluorescence light stress photoinhibition reforestation forest restoration

Rock mass structural recognition from drill monitoring technology in underground mining using discontinuity index and machine learning techniques

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2023年第5期33卷 555-571页

作者： Alberto Fernández JoséA.Sanchidrián pablo Segarra Santiago Gómez Enming Li Rafael Navarro Universidad Politécnica de Madrid–ETSI Minas y Energía Spain Universidad de Salamanca–GIR Charrock Spain

A procedure to recognize individual discontinuities in rock mass from measurement while drilling(MWD)technology is developed,using the binary pattern of structural rock characteristics obtained from in-hole images for *** from two underground operations with different drilling technology and different rock mass characteristics are considered,which generalizes the application of the methodology to different sites and ensures the full operational integration of MWD data *** approaches are followed for site-specific structural model building:a discontinuity index(DI)built from variations in MWD parameters,and a machine learning(ML)classifier as function of the drilling parameters and their *** prediction ability of the models is quantitatively assessed as the rate of recognition of discontinuities observed in borehole *** between the parameters involved in the models for each site,and differences in their weights,highlight the site-dependence of the resulting *** ML approach offers better performance than the classical DI,with recognition rates in the range 89%to 96%.However,the simpler DI still yields fairly accurate results,with recognition rates 70%to 90%.These results validate the adaptive MWD-based methodology as an engineering solution to predict rock structural condition in underground mining operations.

关键词： Drill monitoring technology Rock mass characterization Underground mining Similarity metrics of binary vectors Structural rock factor Machine learning

Comparison between linseed expeller and canola expeller on concentrate intake,and circulating inflammatory mediators in Holstein calves

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2020年第1期6卷 47-53页

作者： Pedro Melendez Romina Ramirez Maria P.Marin Mario Duchens pablo Pinedo College of Veterinary Medicine University of GeorgiaTiftonGA31793USA College of Veterinary Medicine University Santo TomasVina del MarChile College of Veterinary Medicine University of ChileSantiagoChile Department of Animal Sciences Colorado State UniversityFort CollinsCO80523USA College of Veterinary Medicine University of MissouriColumbiaMO 61203USA

The objective of this study was to compare the effect of linseed and canola expeller on average daily weight gain(ADG),concentrate intakes,incidence of diarrhea,serum haptoglobin,interleukin(IL)-1,and resolvin-E1 in female Holstein calves from birth to weaning.A sample size of 20 calves per group was calculated and were randomly allocated at the time of *** group(LIN)was fed a starter with linseed expeller,while canola group(CAN)received a similar concentrate,but with canola *** expellers were included at a rate of 25%dry matter(DM)basis of the *** waste milk was fed twice a day until *** were weighed at birth,30,and 60 d of *** intake was evaluated daily from 5 to 60 d.A blood sample was obtained at birth,14,28,35,and 49 d of age,and bovine serum resolvin-El,haptoglobin,and IL-1 were assayed by commercial enzyme-linked immunosorbent assay(ELISA)*** of diarrhea and the duration of the events were also *** effect of the interaction group by time on body weight(BW)and starter intake was not significant(P>0.05).Average daily gains(ADG)from 0 to 60 d for CAN and LIN groups were 0.680 and 0.675 kg/d(P>0.05),*** of diarrhea were 25%and 45%for CAN and LIN groups,respectively(P=0.18).LIN group had greater concentrations of IL-1 at d 21,haptoglobin at d 7,and resolving-El at d 14 and 49 than CAN group,*** is concluded that BW at weaning,ADG,and concentrate intakes were not different between groups fed starters containing linseed or canola expeller(25%inclusion).The concentrations of cytokines and haptoglobin were the greatest in LIN group.

关键词： Linseed expeller Omega-3 fatty acids Calf Daily gain Diarrhea

Sending an SOS: Healing the Liver with the Bone Marrow

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2022年第1期10卷 1-3页

作者： Gustavo Ayares Juan pablo Arab Ashwani K.Singal Departamento de Gastroenterología Escuela de MedicinaPontificia Universidad Católica de ChileSantiagoChile De-partment of Internal Medicine University of South Dakota Sanford School of MedicineSioux FallsSDUSA Division of Transplant Hepatology Avera Transplant InstituteSioux FallsSDUSA

Citation of this article:Ayares G,Arab JP,Singal *** an SOS:Healing the Liver with the Bone Marrow.J Clin Transl Hepatol 2022;10(1):***:10.14218/***,an end stage of any chronic liver disease is a form of impaired regeneration leading to progressive dif-fuse hepatic *** healthcare burden of cirrhosis is increasing,and it is currently the 13th leading cause of death *** progression of liver injury and fibrosis results in portal hypertension and hepatic insufficiency.

关键词： impaired Liver hepatic

Two-dimensional modeling of fine sediment transport with mixed sediment and consolidation: Application to the Gironde Estuary,France

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

International Journal of Sediment Research 2021年第6期36卷 736-746页

作者： Sylvain Orseau Nicolas Huybrechts pablo Tassi Damien Pham Van Bang Fabrice Klein Cerema Direction Technique Eau Mer et Fleuves Sorbonne Universités Université de Technologie de Compiégne CNRSFRE2012 RobervalCentre de Recherche Royallieu Electricité de France R&D Department Laboratoire d'Hydraulique Saint Venant (ENPC-EDF/R&D-CEREMA) 5. Centre Eau Terre et Environnement INRS-ETE 6. Grand Port Maritime de Bordeaux

In order to optimize ship navigation in the macrotidal Gironde Estuary, a recent project funded by the port of Bordeaux aims at better understand and forecast hydrodynamic and fine sediment transport within the estuary. In the framework of this project, a two-dimensional hydro-sedimentary model is built. The model includes hydrodynamic forcings, mixed-sediment transport, and consolidation processes. The harmonic analysis of the astronomical tides reveals a strong distortion of the tidal wave inducing the growth of overtide constituents and the non-significant effect of tide-surge interactions in annual-scale prediction. Depending on hydrological conditions, river discharge can considerably alter the model accuracy due to the migration of the turbidity maximum zone modifying the bottom *** with measurements shows the ability of the model to reproduce suspended-sediment concentrations in the central Estuary. Sensitivity of the model to sediment features has also been discussed in regard of suspended-sediment concentrations and fluid mud deposits. The model will be further coupled with ship squat predictions and a morphodynamic model.

关键词： Sediment transport Numerical modeling Mixed sediment Gironde Estuary Opentelemac

Obesity, Body Fat Distribution, and Physical Activity in School-age Children: an Urban and Rural Comparison in Valparaíso, Chile

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2016年第11期29卷 834-839页

作者： pablo A Lizana Paula Cisternas-Vallejos Leonel Araya Francisco Aguilera Manuel Mora Laboratory of Morphological Sciences Instituto de BiologfaPontificia Universidad Cat61ica de ValparaisoValparaiso2373223Chile

This study analyze the relation between body composition, physical activity （PA）, and sex in Chilean children from rural and urban public educational institutions. The prevalence of obesity （according to BMI） was 30.88% in urban children and 28.93% in rural children. Central obesity presented mainly in the rural girls. Approximately 90% of the participants reported 〈7 h of PA/week, regardless of residential area. In addition, central fat was strongly associated with rural residence; the children reported lower PA levels, and they presented a higher prevalence of central fat. The results reflect the need to implement programs to improve PA conditions in the child urban-rural population.

关键词： an Urban and Rural Comparison in Valpara and Physical Activity in School-age Children so Chile Obesity

An uneasy alliance:a nesting association between aggressive ants and equally fierce social wasps

在线全文

学校读者我要写书评

暂无评论

Insect Science 2020年第1期27卷 122-132页

作者： pablo Servigne Jerome Orivel Frederic Azemar James Carpenter Alain Dejean Bruno Corbara Ecologie Sociale CP 231 Universite Libre de Bruxelles(ULB)Campus PlaineBoulevard du TriompheBrusselsBelgium CNRS UMR EcoFoGAgroParisTechCiradINRAUniversite des AntillesUniversite de GuyaneKourouFrance EcoLabf CNRS INPTUPSUniversite de ToulouseToulouseFrance Division of Invertebrate Zoology American Museum of Natural HistoryNew YorkNew YorkUSA CNRS LMGEUniversite Clermont AuvergneClermont-FerrandFrance

Although the Neotropical territorially dominant arboreal ant Azteca chartifex Forel is very aggressive towards any intruder,its populous colonies tolerate the close presence of the fierce polistine wasp Polybia rejecta(F.).In French Guiana,83.33%of the 48 *** nests recorded were found side by side with those of *** nesting association results in mutual protection from predators(i.e.,the wasps protected from army ants;the ants protected from birds).We conducted field studies,laboratorybased behavioral experiments and chemical analyses to elucidate the mechanisms allowing the persistence of this *** to differences in the cuticular profiles of the two species,we eliminated the possibility of chemical ***,analyses of the carton nests did not reveal traces of marking on the *** ant forager flows were not perturbed by extracts from the wasps’Dufour’s and venom glands,we rejected any hypothetical action of repulsive ***,we noted that the wasps"scraped"the surface of the upper part of their nest envelope using their mandibles,likely removing the ants'scent trails,and an experiment showed that ant foragers were perturbed by the removal of their scent *** leads us to use the term"erasure hypothesis."Thus,this nesting association persists thanks to a relative tolerance by the ants towards wasp presence and the behavior of the wasps that allows them to"contain"their associated ants through the elimination of their scent trails,direct attacks,"wing-buzzing"behavior and ejecting the ants.

关键词： Azteca chartifex ants interspecific association mutualism Polybia rejecta wasps scent trail erasure

ZigID:Improving visibility in industrial environments by combining WSN and RFID

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 Zhejiang University-Science A(Applied Physics & Engineering) 2011年第11期12卷 849-859页

作者： pablo GARCíA ANSOLA Andrés GARCíA Javier de las MORENAS Javier GARCíA ESCRIBANO Francisco Javier OTAMENDI Autolog Labs School of Industrial EngineeringUniversity of Castilla-La Mancha Applied Economic Department University Rey Juan Carlos

The objective of this work is to provide decision-making processes with an updated/real picture of the mobile resources in industrial environments through a constant feedback of *** combination of identification technologies and wireless sensor networks(WSN) is proposed as a key development to guarantee an accurate and timely supply of online information regarding the localization and tracking of the mobile wireless *** approach uses a cooperative and distributed localization system,called ZigID,which is a WSN based on a Zigbee network with radio frequency identification(RFID) active tags as end *** WSN can recover not only the ID information stored at the tags attached to mobile resources,but also any other useful data captured by specific sensors for acceleration,temperature,humidity and fuel *** paper also shows the development of ZigID,including devices and information flows,as well as its implementation in ground handling operations at the Ciudad Real Central Airport,Spain.

关键词： Radio frequency identification(RFID) Tracking Wireless sensor networks(WSNs)

Experimental and computational study of smoke dynamics from multiple fire sources inside a large-volume building

在线全文

学校读者我要写书评

暂无评论

Building Simulation 2021年第4期14卷 1147-1161页

作者： Gabriele Vigne Wojciech Węgrzyński Alexis Cantizano pablo Ayala Guillermo Rein Cándido Gutiérrez-Montes Fluid Dynamics Division of the Department of Mining and Mechanical Engineering Universidad de JaénJaénSpain Institute for Research in Technology ICAIUniversidad Pontificia ComillasMadridSpain Building Research Institute(ITB) WarsawPoland Imperial College London LondonUK JVVA Fire&Risk MadridSpain

Fire in large-volume buildings poses separate and distinct challenges from compartmented *** particular,the risk it poses on life safety is mostly due to the smoke it produces,its effects on the evacuation process,and how it can affect the firefighters when they approach the building to fight the fire and rescue the *** is why smoke control in large-volume enclosures is of utter importance for life safety,property protection and business *** research presents an experimental and numerical study of the smoke dynamics from four fire sources(combined heat release rate of 5.2 MW)with different ignition times and under transient ventilation conditions,inside a 20 m high cubic *** measurements in the plume and close to the walls have been recorded using 59 *** data was used in the determination of the smoke layer interface height,with the least-square and the N-Percent *** show that significantly worse conditions are induced by multiple sources than those in a single fire of equal *** results have been obtained using the computational fluid dynamics code FDS(Fire Dynamics Simulator,v6.7.1).The comparison shows that in the far field the temperature predictions are accurate inside the smoke layer(10 m and 15 m)with discrepancies lower than 10%,whereas higher significant discrepancies were observed at the smoke layer interface,i.e.5 m high,with discrepancies up to 20%.Furthermore,a grid analysis has been performed showing that grid resolutions,D*/δ,based on the global HRR of the fire might be sufficient to predict the fire induced conditions far from the *** analysis confirmed the applicability of FDS to the assessment of the smoke dynamics under complex fire conditions away from ***,the present work shows the importance of considering fires with multiple sources due to the faster smoke production compared with single fires.

关键词： experiments simulation fire buildings FDS CFD