检索结果-南通市图书馆

Current Zoology 2021年第5期67卷 561-563页

作者： denise NERY Florencia PALOTTINI Walter M.FARINA Laboratorio de Insectos Sociales Departamento de Biodiversidad y Biologia ExperimentalFacultad de Ciencias NaturalesUniversidad de Buenos AiresBuenos AiresArgentina Instituto de Fisiologia Biologia Molecular y Neurociencias(IFIBYNE)CONICET-Universidad de Buenos AiresBuenos AiresArgentina

When collecting a flower,bumblebees learn to associate floral features with reward,preferring,and specializing in the most profitable ones they visit(Chittka et al.1999).The proboscis extension reflex(PER)occurs naturally in the feeding context allowing individuals to access the floral *** controlled conditions,the PER paradigm is a well-established controlled learning procedure used in honeybees(Takeda 1961),and some bumblebees of the genus Bombus(Laloi et al.1999).The assessment of cognitive capacities in an operant context has been studied mainly in *** and ***(Chittka 1998;Mirwan and Kevan 2014).However,little is known about the ability to evoke associative memories in an operant context,which had been acquired in a classical *** turn,on the contrary,the Bombus genus also has the capacity to form longterm memories(Chittka 1998;McAulay et al.2015).In particular,the South American bumblebee ***(***)can learn a pure odor when it is presented in a paired association with a sugar reward within a PER paradigm(Palottini et al.2018).As other species,this one is a commercially reared pollinator that is increasingly managed in pollination services of some South American countries and they could be important for increasing production of crops(Palottini et al.2018).

关键词： crops sugar associative

RESPONSE OF WHEAT COMPOSITE CROSS POPULATIONS TO DISEASE AND CLIMATE VARIATION OVER 13 GENERATIONS

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 Agricultural Science and Engineering 2021年第3期8卷 400-415页

作者： Odette denise WEEDON Maria Renate FINCKH Faculty of Organic Agricultural Sciences Department of Ecological Plant ProtectionUniversity of KasselNordbahnhofstr.1aWitzenhausenD-37213Germany

Since the F_(5)(2005),three winter wheat composite cross populations(CCPs)based on germplasm specifically suitable for low-input conditions were subjected to natural selection under organic and conventional *** the F_(6),each CCP was divided into two parallel populations(12 CCPs in total)and maintained continuously until *** used modern cultivars with different disease susceptibilities were grown alongside to assess the agronomic performance of the *** organically managed CCPs were comparable in yield and foliar disease resistance to two continuously used reference cultivars,Achat and *** contrast,under conventional management the *** outyielded the CCPs(Achat was not tested),highlighting the importance of parental cultivar choice for specific management *** CCPs were found to be moderately resistant to brown rust and even to the newly emerged stripe rust races prevalent in Europe since *** between the CCPs were mainly due to parental genetic background and were significant in the first five generations,but were no longer so in the last five *** addition,these differences tended to vary depending on the experimental year and the environmental stresses *** conclusion,the CCPs despite being derived from older cultivars are able to compete with more recently released reference cultivars under organic farming practices and represent a dynamic germplasm resource.

关键词： evolutionary breeding heterogeneous crop population management system

Ectomycorrhizal and Saprotrophic Fungal Communities Vary Across mm-Scale Soil Microsites Differing in Phosphatase Activity

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

Pedosphere 2019年第3期29卷 344-359页

作者： Aaron GODIN denise BROOKS Sue J. GRAYSTON Melanie D. JONES Biology Department University of British Columbia Okanagan campus Kelowna V1V 1V7 (Canada) Department of Forest & Conservation Sciences Faculty of Forestry University of British Columbia Vancouver V6T 1Z4 (Canada)

To understand nutrient cycling in soils, soil processes and microorganisms need be better characterized. To determine whether specific trophic groups of fungi are associated with soil enzyme activity, we used soil imprinting to guide mm-scale sampling from microsites with high and low phosphatase activities in birch/Douglas-fir stands. Study 1 involved sampling one root window per site at 12 sites of different ages(stands);study 2 was conducted at one of the stem-exclusion stands, at which 5 root windows had been installed. Total fungal and ectomycorrhizal(EM) fungal terminal-restriction fragment length polymorphism(TRFLP)fingerprints differed between high-and low-phosphatase activity microsites at 8 of 12 root windows across 12 sites. Where differences were detected, fewer EM fungi were detected in high-than low-phosphatase activity microsites. Using 5 root windows at one site,next-generation sequencing detected similar fungal communities across microsites, but the ratio of saprotrophic to EM fungal reads was higher in high-phosphatase activity microsites in the two windows that had low EM fungal richness. In windows with differences in fungal communities, both studies indicated that EM fungi were less successful than saprotrophic fungi in colonizing fine-scale,organic matter-rich microsites. Fine-scale sampling linked with in situ detection of enzyme activity revealed relationships between soil fungal communities and phosphatase activity that could not be observed at the scales employed by conventional approaches, thereby contributing to the understanding of fine-scale phosphorus cycling in forest soils.

关键词： ectomycorrhizae fine scale fungal communities phosphatase root windows saprotrophic fungi soil imprinting

Plant-frugivore interactions in an intact tropical forest in north-east Thailand

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

Integrative Zoology 2011年第3期6卷 195-212页

作者： Wangworn SANKAMETHAWEE Andrew J.PIERCE George A.GALE Britta denise HARDESTY Conservation Ecology Program School of Bioresources and TechnologyKing Mongkut’s University of Technology ThonburiBangkok Thailand Walai Rukhavej Botanical Research Institute Mahasarakham UniversityMahasarakhamThailand CSIRO Ecosystem Sciences AthertonQueenslandAustralia

Fleshy-fruited plants in tropical forests largely rely on vertebrate frugivores to disperse their *** this plant-animal interaction is typically considered a diffuse mutualism,it is fundamental as it provides the template on which tropical forest communities are *** applied a mutualistic network approach to investigate the relationship between small-fruited fleshy plant species and the fruit-eating bird community in an intact evergreen forest in north-east Thailand.A minimum of 53 bird species consumed fruits of 136 plant ***-avian frugivore networks were highly asymmetrical,with observed networks filling 30%of all potential *** some of the missing links in the present study might be due to undersampling,forbidden links can be attributed to size constraints,accessibility and phenological uncoupling,and although the majority of missing links were unknown(58.2%),many were probably due to a given bird species being either rare or only a very occasional fruit *** most common frugivores were bulbuls,barbets and fairy-bluebirds,which were responsible for the majority of fruit removal from small fleshy fruited species in our *** birds seemed to be a minor component of the plant-frugivore networks,accounting for only 3%of feeding visits to fruiting trees;they filled 2%of the overall potential *** majority of interactions were generalized unspecific;however,Saurauia roxburghii *** to be dependent on flowerpeckers for dispersal,while Thick-billed Pigeons were only seen to eat figs.

关键词： avian frugivore nestedness plant-frugivore networks seed dispersal tropical forest

Relaxation Schemes for the M1 Model with Space-Dependent Flux:Application to Radiotherapy Dose Calculation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

作者： denise Mina.

学校读者我要写书评

暂无评论

Communications in Computational Physics 2016年第1期19卷 168-191页

作者： Teddy Pichard denise Aregba-Driollet Stephane Brull Bruno Dubroca Martin Frank Centre Lasers Intenses et Applications Universite de Bordeaux351 cours de la liberationTalence33400France Mathematics division Center for Computational Engineering ScienceRheinisch-Westf¨alische Technische HochschuleSchinkelstrasse 2Aachen52062Germany Institut de Mathematiques de Bordeaux Universite de Bordeaux351 cours de la liberationTalence33400France

Because of stability constraints,most numerical schemes applied to hyperbolic systems of equations turn out to be costly when the flux term is multiplied by some very large *** problem emerges with the M_(1)system of equations in the field of radiotherapy when considering heterogeneous media with very disparate ***,the flux term of the M_(1)system is non-linear,and in order for the model to be well-posed the numerical solution needs to fulfill conditions called *** this paper,we propose a numerical method that overcomes the stability constraint and preserves the realizability *** this purpose,we relax the M_(1)system to obtain a linear flux *** we extend the stencil of the difference quotient to obtain *** scheme is applied to a radiotherapy dose calculation example.

关键词： Radiotherapy Moments models relaxation models method of characteristics

Effect of mini-cutting size on adventitious rooting and morphophysiological quality of Ilex paraguariensis plantlets

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 Forestry Research 2021年第2期32卷 815-822页

作者： Nathalia Pimentel denise Gazzana Janaina de Fatima Spanevello Kelen Haygert Lencina Dilson Antônio Bisognin Programa de Pós-Graduação em Engenharia Florestal Centro de Ciências Rurais da Universidade Federal de Santa MariaAvenida Roraima1000Santa MariaRS 97105-900Brazil Curso de Graduação em Agronomia Centro de Ciências Rurais da Universidade Federal de Santa MariaAvenida Roraima1000Santa MariaRS 97105-900Brazil Departamento de Fitotecnia Centro de Ciências RuraisUniversidade Federal de Santa MariaAv.Roraima1000Santa MariaRS 97105-900Brazil

As the energizing and therapeutic effects of infusions of mate(Ilex paraguariensis ***.-Hil)leaves are increasingly recognized,rising global consumption is also increasing the demand for plantlets with high genetic and morphological ***-cuttings are an alternative for clonal plantlets;however,more details are needed on factors that affect the success of this ***,toward maximizing production,we evaluated adventitious rooting competence of mini-cuttings of different sizes and the morphophysiological quality of the resultant ***(one bud;length up to 2.5 cm),medium(multiple buds;length 2.6–5.0 cm),and large(multiple buds;length 5.1–10.0 cm)mini-cuttings were planted in a mixture of commercial substrate,vermiculite,and coarse sand(1:1:1 v:v:v),grown in a humidity chamber,then evaluated after 45,60,75,and 90 days for survival,percentage of callus and shoot formation,number and length of shoots,percentage of rooted cuttings,and number and length of *** rooted mini-cuttings were then cultivated in commercial substrate and subsurface soil(2:1 v:v)and evaluated after 30,60,90 and 120 days of cultivation for morphophysiology of the plantlets,percentage of survival,number of leaves,shoot height,stem diameter,and ratio of shoot height to stem *** 120 days,the plantlets were evaluated for the ratio of shoot and root dry mass,total length,surface area,total volume,and mean diameter of roots and Dickson quality *** rooting of the mini-cuttings and the morphophysiological quality of the plantlets were not influenced by the size of the vegetative ***,single-bud mini-cuttings have similar adventitious rooting competence,and result in plantlets with adequate morphophysiological quality,based upon leaf development,shoot height,stem diameter and length,and surface area,volume and diameter of ***-bud mini-cuttings up to 2.5 cm long can thus be used to maximize production of mate plantlets by mini-c

关键词： Aquifoliaceae Clonal forestry Mini-cutting technique Plantlet production Vegetative propagation

Systematic review: Safety of balloon assisted enteroscopy in Crohn's disease

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 Gastroenterology 2016年第40期22卷 8999-9011页

作者： Ahilan Arulanandan Parambir S Dulai Siddharth Singh William J Sandborn denise Kalmaz Division of Gastro-enterology University of California San Diego

AIM To determine the overall and comparative risk of procedure related perforation of balloon assisted enteroscopy(BAE) in Crohn's disease(CD). METHODS Systematic review(PROSPERO #CRD42015016381) of studies reporting on CD patients undergoing BAE. Seventy-three studies reporting on 1812 patients undergoing 2340 BAEs were included. Primary outcome of interest was the overall and comparative risk of procedure related perforation of diagnostic BAE in CD. Secondary outcomes of interest were risk of procedure related perforation of diagnostic double balloon enteroscopy(DBE), risk of procedure related perforation of therapeutic BAE, efficacy of stricture dilation, and clinical utility of endoscopically assessing small bowel disease *** Per procedure perforation rate of diagnostic BAE in CD was 0.15%(95%CI: 0.05-0.45), which was similar to diagnostic BAE for all indications(0.11%; IRR = 1.41, 95%CI: 0.28-4.50). Per procedure perforation rate of diagnostic DBE in CD was 0.12%(95%CI: 0.03-0.44), which was similar to diagnostic DBE for all indications(0.22%; IRR = 0.54, 95%CI: 0.06-0.24). Per procedure perforation rate of therapeutic BAE in CD was 1.74%(95%CI: 0.85-3.55). Eighty-six percentof therapeutic perforations were secondary to stricture dilation. Dilation was attempted in 207 patients and 30% required surgery during median follow-up of 18 months. When diagnostic BAE assessed small bowel disease activity, changes in medical therapy resulted in endoscopic improvement in 77% of patients. CONCLUSION Diagnostic BAE in CD has a similar rate of perforation as diagnostic BAE for all indications and can be safely performed in assessment of mucosal healing.

关键词： Crohn’s disease Balloon Enteroscopy Safety Perforation Stricture

Total dysphagia after short course of systemic corticotherapy:Herpes simplex virus esophagitis

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 Gastroenterology 2013年第31期19卷 5178-5181页

作者： Isa Jetté-Cté denise Ouellette Claire Béliveau Andrew Mitchell Division of Thoracic Surgery Maisonneuve-Rosemont Hospital University of MontrealMontreal H3L 2H8 Canada Department of Infectious Diseases and Microbiology Maisonneuve-Rosemont Hospital University of MontrealMontreal H3L 2H8 Canada Department of Pathology Maisonneuve-Rosemont Hospital University of Montreal Montreal H3L 2H8 Canada

A 72 year-old female developed a herpetic esophagitis after 3 d of oral corticotherapy for an acute exacerbation of chronic obstructive pulmonary disease,presenting as odynophagia and total *** were taken during a first esophagogastroduodenoscopy(EGD) and the patient was referred to the thoracic surgery service with a presumptive diagnosis of esophageal cancer.A second EGD was planned for dilatation,but by that time the stenosis was completely *** biopsies taken during the first EGD revealed multiple herpetic viral inclusions and ulcerations without any dysplasia or *** front of a severe esophageal stenosis,one must still exclude the usual differential diagnosis peptic stenosis and *** of endoscopic lesions can suggest the diagnosis but must be promptly confirmed by biopsy,viral culture or polymerase chain *** immune systemic effects of corticotherapy are well known and herpetic esophagitis occurs most frequently in immunocompromised individuals,this case emphasizes the importance of clinical awareness concerning short courses of corticotherapy for immunocompetent *** article discusses the reactivation process of herpetic infection in this context and addresses its diagnostic and therapeutic issues.

关键词： Herpes simplex Esophagitis Dysphagia Corticosteroids Immunocompetence

Beneficial long term effect of a phosphodiesterase-5-inhibitor in cirrhotic portal hypertension:A case report with 8 years follow-up

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 Gastroenterology 2018年第3期24卷 438-444页

作者： Peter Deibert Adhara Lazaro Zoran Stankovic denise Schaffner Martin Rossle Wolfgang Kreisel Faculty of Medicine Institute for Exercise and Occupational MedicineDepartment of MedicineUniversity HospitalFreiburg 79106Germany Inselspital Interventional and Pediatric RadiologyInstitute of DiagnosticUniversity of BernBern 3010Switzerland Department of Pharmaceutical Biology and Biotechnology University of FreiburgFreiburg 79106Germany Private Praxis PraxiszentrumFreiburg 79104Germany Faculty of Medicine Endocrinology and Infectious DiseasesDepartment of GastroenterologyHepatologyUniversity HospitalFreiburg 79106Germany

Non-selective beta-blockers are the mainstay of medical therapy for portal hypertension in liver cirrhosis. Inhibitors of phosphodiesterase-5(PDE-5-inhibitors) reduce portal pressure in the acute setting by > 10% which may suggest a long-term beneficial effect. Currently, there is no available data on long-term treatment of portal hypertension with PDE-5-inhibitors. This case of a patient with liver cirrhosis secondary to autoimmune liver disease with episodes of bleeding from esophageal varices is the first documented case in which a treatment with a PDE-5-inhibitor for eight years was monitored. In the acute setting, the PDE-5-inhibitor Vardenafil lowered portal pressure by 13%. The portal blood flow increased by 28% based onDoppler sonography and by 16% using MRI technique. As maintenance medication the PDE-5-inhibitor Tadalafil was used for eight consecutive years with comparable effects on portal pressure and portal blood flow. There were no recurrence of bleeding and no formation of new varices. Influencing the NO-pathway by the use of PDE-5 inhibitors may have long-term beneficial effects in compensated cirrhosis.

关键词： Portal hypertension Phosphodiesterase-5 Liver hemodynamics Doppler sonography Magnetic resonance imaging Liver cirrhosis