检索结果-南通市图书馆

Flight performance and wing morphology in the bat Carollia perspicillata:biophysical models and energetics

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2023年第5期18卷 876-890页

作者： Lucas de Oliveira CARNEIRO Breno MELLADO Marcelo Rodrigues NOGUEIRA Ariovaldo Pereira da CRUZ-neto Leandro Rabello MONTEIRO Laboratório de Ciências Ambientais Centro de Biociências e BiotecnologiaUniversidade Estadual do Norte FluminenseCampos dos GoytacazesRio de JaneiroBrasil Departamento de Biodiversidade Universidade Estadual PaulistaRio ClaroSão PauloBrasil

Studies on functional performance are important to understand the processes responsible for the evolution of *** trait variation within species influences the energetic cost of locomotion and impacts life history traits,with ecological and evolutionary *** study examined wing morphology correlates of flight performance measured by energetic expenditure in the Seba’s short-tailed bat,Carollia *** the flight experiments,nature caught bats(59 females,57 males)were allowed to fly for 3 min in a *** each flight,thermographic images were taken to measure body temperature,and biophysical models were used to calculate sensible heat loss as a measure of energetic *** morphological traits were measured for each individual and associated with heat loss and power required to fly on performance *** morphological traits explained 7-10%of flight energetic cost,and morphologies with the best performance would save the energy equivalent to 9-30%of total daily *** optimal performance areas within the *** morphospace were consistent with predicted selection trends from the literature.A trade-off between demands for flight speed and maneuverability was *** loading and camber presented sexual *** morphological differences are likely associated with more economical but less maneuverable flight in females,leading them to fly more often in open areas along the forest *** findings demonstrate how small scale changes in wing morphology can affect life history strategies and fitness.

关键词： aerodynamics Chiroptera infrared thermography performance surfaces Phyllostomidae wing morphometrics

Changes in feeding selectivity of freshwater invertebrates across a natural thermal gradient

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2018年第2期64卷 231-242页

作者： Timothy A. C. GORDON Joana neto-CEREJEIRA Paula C. FUREY Eoin J. O'GORMAN Imperial College London Silwood Park Campus Buckhurst Road Ascot Berkshire SL5 7PY UK Biosciences College of Life and Environmental Sciences University of Exeter Stocker Road Exeter EX4 4QD UK Department of Biology Saint Catherine University St Paul MN 55105 USA

Environmental warming places physiological constraints on organisms, which may be mitigated by their feeding behavior. Theory predicts that consumers should increase their feeding selectivity for more energetically valuable resources in warmer environments to offset the disproportionate increase in metabolic demand relative to ingestion rate. This may also result in a change in feeding strategy or a shift towards a more specialist diet. This study used a natural warming experiment to investigate temperature effects on the feeding selectivity of three freshwater invertebrate grazers： the snail Radix balthica, the blackfly larva Simulium aureum, and the midgefly larva Eukiefferiella minor. Chesson＇s Selectivity Index was used to compare the proportional abundance of diatom species in the guts of each invertebrate species with corresponding rock biofilms sampled from streams of different tem- perature. The snails became more selective in warmer streams, choosing high profile epilithic diatoms over other guilds and feeding on a lower diversity of diatom species. The blackfly larvae appeared to switch from active collector gathering of sessile high profile diatoms to more passive filter feeding of motile diatoms in warmer streams. No changes in selectivity were observed for the midgefly larvae, whose diet was representative of resource availability in the environment. These results suggest that key primary consumers in freshwater streams, which constitute a major portion of invertebrate biomass, can change their feeding behavior in warmer waters in a range of different ways. These patterns could potentially lead to fundamental changes in the flow of energy through freshwater food webs.

关键词： climate change global warming diet Lymnaea peregra Simuliidae Chironomidae

Prevention strategies for Alzheimer’s disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Translational Neurodegeneration 2012年第1期1卷 99-102页

作者： Serge Gauthier Liyong Wu Pedro Rosa-neto Jianping Jia McGill Center for studies in Aging McGill UniversityMontrealCanada Neurological Department Xuanwu HospitalCapital UniversityBeijingChina McGill Centre for Studies in Aging(MCSA) McGill University6825Boul.LaSalle BlvdMontrealQC H4H 1R3Canada

Symptomatic treatment during the dementia stage of Alzheimer’s disease(AD)cannot delay or halt the progression of this ***,prevention in the preclinical stage is likely the most effective way to decrease the incidence of this age-associated neurodegenerative condition,and its associated burden for individuals and ***,gender,family history,ApoE4,systolic blood pressure,body mass index,total cholesterol level and physical activity are all used as component of dementia risk *** have been numerous challenges in conducting primary prevention trials in *** strategies for prevention studies include studying those subjects with more risk factors for AD,such as older age,those with a positive family history of late onset AD,and those who are ApoE4 *** of these strategies is designed to increase the probability of developing AD thereby decreasing the sample size or the duration of follow *** strategy would be to target directly the pathophysiology of AD in its preclinical stages and use the biomarkers in prevention trial as surrogate *** will be done first in carriers of dominantly inherited early onset *** this research takes place networks of memory clinics must prepare to transfer new knowledge to persons interested in a preventive approach to AD.

关键词： Alzheimer disease Risk factor Prevention Clinical trial Clinical practice

A Robust, Fully Adaptive Hybrid Level-Set/Front-Tracking Method for Two-Phase Flows with an Accurate Surface Tension Computation

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 Computational Physics 2010年第6期8卷 51-94页

作者： Hector D.Ceniceros Alexandre M.Roma Aristeu Silveira-neto Millena M.Villar Department of Mathematics University of California Santa BarbaraCA 93106USA Departamento de Matematica Aplicada Universidade de Sao PauloCaixa Postal 66281CEP 05311-970Sao Paulo-SPBrasil Faculdade de Engenharia Mecanica Universidade Federal de UberlandiaCEP 38400-902Uberlandia-MGBrasil

We present a variable time step,fully adaptive in space,hybrid method for the accurate simulation of incompressible two-phase flows in the presence of surface tension in two *** method is based on the hybrid level set/front-tracking approach proposed in[*** and ***,***.,205,391-400,2005].Geometric,interfacial quantities are computed from front-tracking via the immersed-boundary setting while the signed distance(level set)function,which is evaluated fast and to machine precision,is used as a fluid *** surface tension force is obtained by employing the mixed Eulerian/Lagrangian representation introduced in[***,***-Khalik,*** and ***,***.,203,493-516,2005]whose success for greatly reducing parasitic currents has been *** use of our accurate fluid indicator together with effective Lagrangian marker control enhance this parasitic current reduction by several orders of *** resolve accurately and efficiently sharp gradients and salient flow features we employ dynamic,adaptive mesh *** spatial adaption is used in concert with a dynamic control of the distribution of the Lagrangian nodes along the fluid interface and a variable time step,linearly implicit time integration *** present numerical examples designed to test the capabilities and performance of the proposed approach as well as three applications:the long-time evolution of a fluid interface undergoing Rayleigh-Taylor instability,an example of bubble ascending dynamics,and a drop impacting on a free interface whose dynamics we compare with both existing numerical and experimental data.

关键词： Front-tracking immersed boundary method level set method adaptive mesh re-finements semi-implicit methods multilevel multigrid closest point transform semi-backward difference formula

Major and minor risk factors for postoperative abdominoplasty complications:A case series

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Plastic and Reconstructive Surgery 2022年第2期4卷 56-62页

作者： Oona Tomie Daronch Renata Fernanda Ramos Marcante Aristides Augusto Palhares neto Department of Plastic Surgery State University of Sao PauloBotucatuSao Paulo 18618-687Brazil

Background: Although abdominoplasty is a safe and popular surgery, it is associated with a higher complication rate than other body contouring procedures. Therefore, identifying predictive factors of major and minor complications in patients who have undergone abdominoplasty is necessary to achieve better treatment outcomes after major weight ***: This retrospective study analyzed the medical records of patients who underwent abdominoplasty between January 2016 and December 2019. The inclusion criteria were patients aged >18 years who underwent abdominoplasty as the only surgical procedure and had adequate follow-up. Other patients were excluded from the study. Statistical evaluation was performed using SPSS 20.0;statistical significance was set at a P-value of<***: The study included a total of 152 patients, of whom 146(96.1%) were women and 6(3.9%) were *** mean patient age was 41.1 ± 9.8 years. Comorbidities were reported in 67 patients(44.07%). A direct proportional relationship was observed between the weight of the resected tissue and occurrence of general complications(P=0.01), and the presence of comorbidities increased the occurrence of minor(P=0.04) and major complications(P=0.01).Conclusion: Abdominoplasty is an aesthetic surgical plastic procedure, and its application has increased over the years. Despite its popularity, patient safety requires further attention due to the high risk of complications. It is essential to study all risk factors.

关键词： Abdominoplasty Major complications Minor complications

A web-based, component-oriented application for spatial modelling of habitat suitability of mosquito vectors

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2009年第4期2卷 327-342页

作者： P.Zeilhofer P.S.Arraes neto W.Y.Maja D.A.Vecchiato Department of Geography Universidade Federal de Mato GrossoBrazilAv.F.Correa da Costas/nCoxipo78.060-900 Cuiaba´-MTBrazil Department of Computer Science Universidade Federal de UberlandiaBrazil Universidade Federal de Mato Grosso Brazil

This paper proposes a web-enabled computational environment for the spatial modelling of habitat suitability of mosquito *** a component-based architecture and implemented using an object-oriented data model,we integrate database interfaces,Web feature services(WFS)based on the open GIS consortium(OGC)protocols,and the data-mining tool WEKA,coupled through Java servlet scripts(JSP).The prototype,based exclusively on freely available libraries and software components,provides basic dynamic spatial simulation capabilities using logistic regression to end-users engaged in local and regional health administration and planning but who lack access to specific software and/or detailed knowledge of spatial modelling *** component-based approach facilitates system maintenance and future expansion of functionality,and guarantees the reusability of developed modules in new spatial modelling applications of health and environmental-related *** of the WWW-application was validated in a study of habitat suitability mapping of the Malaria vector Anopheles darlingi,in an area surrounding the Manso River hydropower plant,Central Brazil.

关键词： habitat mapping component and service orientation WWW

Myeloid sarcoma presenting as a colon polyp and harbinger of chronic myelogenous leukemia

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 Gastrointestinal Oncology 2016年第3期8卷 321-325页

作者： Robert Rogers Mark Ettel Margaret Cho Alexander Chan Xiao-Jun Wu Antonio G neto Department of Pathology New York University School of Medicine Department of Pathology Memorial Sloan Kettering Cancer Center Department of Pathology George Washington University School of Medicine

Myeloid sarcoma, also known as granulocytic sarcoma or chloroma is an unusual accumulation of malignant myeloid precursor cells in an extramedullary site, which disrupts the normal architecture of the involved tissue. It is known to occur more commonly in patients with acute myelogenous leukemia and less commonly in those with myelodysplastic syndrome and myeloproliferative neoplasm, such as chronic myelogenous leukemia. The most common sites of involvement include bone, skin and lymph nodes. However, rare cases have been reported in the gastrointestinal tract, genitourinary tract, or breast. Most commonly, a neoplastic extramedullary proliferation of myeloid precursors in a patient would have systemic involvement of a myeloid neoplasm, including in the bone marrow and peripheral blood. Infrequently, extramedullary disease may be the only site of involvement. It may also occur as a localized antecedent to more generalized disease or as a site of recurrence. Herein, we present the first case in the English literature of a patient presenting with an isolated site of myeloid sarcoma arising in the form of a colonic polyp which, after subsequent bone marrow biopsy, was found to be a harbinger of chronic myelogenous leukemia.

关键词： Myeloid sarcoma Granulocytic sarcoma Chloroma Chronic myelogenous leukemia

Osteoblasts are inherently programmed to repel sensory innervation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bone Research 2020年第3期8卷 343-355页

作者： Luis Leitao Estrela neto Francisco Conceicao Ana Monteiro Marina Couto Cecilia JAlves Daniela MSousa Meriem Lamghari Instituto de Investigacao e Inovacao em Saude(i3S) Universidade do Porto4200-135 PortoPortugal Instituto de Engenharia Biomedica(INEB) Universidade do Porto4200-135 PortoPortugal Instituto de Ciencias Biomedicas Abel Salazar(ICBAS) Universidade do Porto4050-313 PortoPortugal

Tissue innervation is a complex process controlled by the expression profile of signaling molecules secreted by tissue-resident cells that dictate the growth and guidance of *** innervation is part of the neuronal network of the bone tissue with a defined spatiotemporal occurrence during bone ***,the current understanding of the mechanisms regulating the map of sensory innervation in the bone tissue is still ***,we demonstrated that differentiation of human mesenchymal stem cells to osteoblasts leads to a marked impairment of their ability to promote axonal growth,evidenced under sensory neurons and osteoblastic-lineage cells *** mechanisms by which osteoblast lineage cells provide this nonpermissive environment for axons include paracrine-induced repulsion and loss of neurotrophic factors *** identified a drastic reduction of NGF and BDNF production and stimulation of Sema3A,Wnt4;and Shh expression culminating at late stage of OB *** noted a correlation between Shh expression profile,OB differentiation stages,and OB-mediated axonal *** of Shh activity and signaling reversed the repulsive action of osteoblasts on sensory ***,to strengthen our model,we localized the expression of Shh by osteoblasts in bone ***,our findings provide evidence that the signaling profile associated with osteoblast phenotype differentiating program can regulate the patterning of sensory innervation,and highlight osteoblast-derived Shh as an essential player in this cue-induced regulation.

关键词： stimulation innervation reversed

Endoscopic sleeve gastroplasty:a narrative review on historical evolution,physiology,outcomes,and future standpoints

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2022年第7期135卷 774-778页

作者： Vitor Ottoboni Brunaldi Manoel Galvao neto Center for Digestive Endoscopy Surgery and Anatomy DepartmentRibeirão Preto Faculty of MedicineUniversity of São Paulo14015-010 Ribeirão PretoBrazil Endovitta Institute 04102-001 São PauloBrazil ABC Faculty of Medicine 09060-870 Santo AndreBrazil

Since its first description in 2013,robust evidence supporting the efficacy and safety of the endoscopic sleeve gastroplasty(ESG)has been on the rise.A large case series and meta-analysis report supported results up to 24 months,while some other studies already described 5-year *** associated with pharmacotherapy,the ESG may help one to achieve weight loss similar to that of surgical sleeve *** the results of the ongoing randomized trials on ESG are awaited,currently available data support the clinical use of the ESG,especially for patients who are refusing or unfit for bariatric surgery.

关键词： Endoscopy Bariatric Obesity Overweight Sleeve Suturing