检索结果-南通市图书馆

Behavioral and physiological flexibility are used by birds to manage energy and support investment in the early stages of reproduction

引用

Current Zoology 2010年第6期56卷 767-792页

作者： franois VZINA Katrina G. SALVANTE Département de Biologie chimie et géographieGroupe de recherche sur les environnements nordiques BORASUniversité du Québec à Rimouski Department of Biological Sciences Simon Fraser University

Interest in phenotypic flexibility has increased dramatically over the last decade, but flexibility during reproduction has received relatively little attention from avian scientists, despite its possible impact on fitness. Because most avian species maintain atrophied reproductive organs when not active, reproduction in birds requires major tissue remodeling in preparation for breeding. Females undergo rapid （days） recrudescence and regression of their reproductive organs at each breeding attempt, while males grow their organs ahead of time at a much slower rate （weeks） and may maintain them at maximal size throughout the breeding season. Reproduction is associated with significant metabolic costs. Egg production leads to a 22%-27% increase in resting metabolic rate （RMR） over non-reproductive values. This is partly due to the activity of the oviduct, an organ that may allow females to adjust reproductive investment by modulating egg size and quality. In males, gonadal recrudescence may lead to a 30% increase in RMR, but the data are inconsistent and general conclusions regarding energetic costs of reproduction in males will require more research. Recent studies on captive female zebra finches describe the impacts of these costs on daily energy budgets and highlight the strategies used by birds to maintain their investment in reproduction when energy is limited. Whenever possible, birds use behavioral flexibility as a first means of saving energy. Decreasing locomotor activity saves energy during challenges such as egg production or exposure to cold temperatures and is an efficient way to buffer variation in individual daily energy budgets. However, when behavioral flexibility is not possible, birds must rely on flexibility at the physiological level to meet energy demands. In zebra finches breeding in the cold, this results in a reduced pace of laying, likely due to down-regulation of both reproductive and non-reproductive function, allowing females to defend mini

关键词： Phenotypic plasticity Phenotypic flexibility BMR Energy budget Organ Egg size Physiological tradeoff Fitness

来源：

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

Life Strategy Traits of the Liana Sericostachys scandens Spreading in the Montane Forests in the Kahuzi-Biega National Park (DR Congo)

引用

Journal of Mountain Science 2012年第5期9卷 665-675页

作者： Masumbuko Ndabaga Céphas Herpigny Basile Barbier Nicolas Habiyaremye Muhashy franois Lejoly Jean Meerts pierre Université Officielle de Bukavu PoBox 570 Bukavu DR Congo Laboratoire d'Ecologie Végétale et Biogéochimie CP 244 Université Libre de Bruxelles Av FD Roosevelt 50 B-1050 Bruxelles Belgium Botany and Computational Plant Architecture IRD - Marie Curie. 34398 Montpellier cedex 5 France Institut Royal des Sciences Naturelles de Belgique Rue Vautier 29 1000 Bruxelles Belgium Herbarium de l'Université Libre de Bruxelles 50 Avenue F. Roosevelt - CP 169 B-1050 Bruxelles Belgium

Sericostaehys seandens is a monocarpic and heliophilous liana, native in tropical African forests. In the montane forests of the Kahuzi-Biega National Park （KBNP）（East of DR Congo）, it has been expanding very strongly for a decade, and is currently considered as having negative impacts on biodiversity conservation. In this paper, we test if S. scandens differs from three co-occurring, native, non spreading lianas （Gouania longispicata, Tacazzea apiculata and Adenia bequaertii） for functional traits which might influence plant expansion. For leaf traits （SLA, dry matter content, nitrogen concentration）, S. scandens did not show extreme values compared to those of the three other lianas. In contrast, S. scandens had much higher biomass allocation to sexual reproduction. It also differs from the three other lianas for its reproductive strategy that combines both vegetative propagation and sexual reproduct/on, and propagule dispersal by wind. Moreover, S. scandens has larger leaves and a greater number of lateral branches per unit stem length. It is argued that the particular combination of functional traits exhibited by *** may in part explain its propensity to behave as an opportunistic weed in the disturbed areas in the montane forests of Kahuzi-Biega.

关键词： Life strategy Sericostachys seandens montane forest Kahuzi-Biega National Park functional traits Native expanding species.

来源：

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

A Formal Passage From a System of Boltzmann Equations for Mixtures Towards a Vlasov-Euler System of Compressible Fluids

引用

Acta Mathematicae Applicatae Sinica 2019年第1期35卷 158-173页

作者： Laurent DESVILLETTES fran?ois GOLSE Valeria RICCI Université Paris Diderot Sorbonne Paris Cité Institut de Mathématiques de Jussieu-Paris Rive GaucheUMR CNRS 7586 CNRS Sorbonne Universités UPMC Univ CMLS Ecole polytechnique et CNRS Université Paris-Saclay Dipartimento di Matematica e Informatica Università degli Studi di Palermo

A formal asymptotics leading from a system of Boltzmann equations for mixtures towards either Vlasov-Navier-Stokes or Vlasov-Stokes equations of incompressible fluids was established by the same authors and Etienne Bernard in: A Derivation of the Vlasov-Navier-Stokes Model for Aerosol Flows from Kinetic Theory Commun. Math. Sci., 15: 1703–1741(2017) and A Derivation of the Vlasov-Stokes System for Aerosol Flows from the Kinetic Theory of Binary Gas Mixtures. KRM, 11: 43–69(2018). With the same starting point but with a different scaling, we establish here a formal asymptotics leading to the Vlasov-Euler system of compressible fluids. Explicit formulas for the coupling terms are obtained in two typical situations: for elastic hard spheres on one hand, and for collisions corresponding to the inelastic interaction with a macroscopic dust speck on the other hand.

关键词： Vlasov-Euler system Boltzmann equation Hydrodynamic limit Aerosols Sprays Gas mixture

来源：

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

Hype and hope of hepatic arterial infusion for colorectal cancer

引用

Hepatobiliary Surgery and Nutrition 2021年第2期10卷 235-237页

作者： françois Ghiringhelli Centre de Recherche INSERM LNC-UMR1231 DijonFrance University of Burgundy franche-Comté DijonFrance Department of Medical Oncology Centre Georges-François LeclercDijonFrance Cancer Biology Transfer Platform Centre Georges-François LeclercDijonFrance Genetic and Immunology Medical Institute DijonFrance

Contrary to most solid metastatic cancers,metastatic colorectal cancer could be cured by surgical removal of the metastasis in the context of lung or liver *** retrospective studies performed 20 years ago showed that surgery alone led to cure of the patient in about 35%of cases(1).To improve patient survival and to increase the cure rate,perioperative intravenous chemotherapy was *** a large EORTC trial among highly selected patients,perioperative FOLFOX regimen improved relapse-free survival with an absolute difference in 3-year PFS of 8.1%(28.1%in the surgery-only group vs.36.2%in the perioperative chemotherapy group)and there was a non-significant increase in overall survival(5-year overall survival was 51.2%in the perioperative chemotherapy group vs.47.8%in the surgery-only group)(2).Despite this somewhat disappointing result,perioperative FOLFOX regimen became the standard of care for the management of resectable colorectal liver metastasis.

关键词： colorectal chemotherapy metastasis

来源：

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

Drug resistance in glioblastoma:are persisters the key to therapy

引用

Cancer Drug Resistance 2020年第3期3卷 287-301页

作者： Lisa Oliver Lisenn Lalier Céline Salaud Dominique Heymann pierre françois Cartron françois M.Zallette Universitéde Nantes INSERMCRCINANantes 44007France. CHU de Nantes Nantes 44093France. LaBCT ICOSaint Herblain 44805France.

Glioblastoma(GBM)represents the main form of brain tumors in adults,and one of the most aggressive cancers *** treatment of GBM is a combination of surgery(when possible),chemotherapy(usually Temozolomide,TMZ)and radiotherapy(RT).However,despite this heavy treatment,GBM invariably recur and the median length of survival following diagnosis is 12 to 15 months,with less than 10%of people surviving longer than five *** is extremely resistant to most treatments because of its heterogeneous nature,which is associated with extreme clonal plasticity and the presence of cancer stem cells,refractory to TMZ-and RT-induced cell *** this review,we explore the mechanisms by which cancer cells,and especially GBM,can acquire resistance to *** describe and discuss the concept of persister/tolerant cells that precede and/or accompany the acquisition of ***/tolerant cells are cancer cells that are not eliminated by treatment(s)because of different mechanisms ranging from dormancy/quiescence to *** discuss the possibility of targeting these mechanisms in new therapeutic regimen.

关键词： Drug resistance persisters tolerance chromatin remodeling metabolism tumor environment

来源：

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

Experimental and Numerical Analysis of a PCM-Integrated Roof for Higher Thermal Performance of Buildings

引用

Journal of Thermal Science 2024年第2期33卷 522-536页

作者： SIMON françois RUIZ-VALERO Letzai GIRARD Aymeric GALLEGUILLOS Hector Centro de Desarrollo Urbano Sustentable(CEDEUS) Pontificia Universidad Católica de Chile7500000SantiagoChile Facultad de Ciencias e Ingeniería Pontificia Universidad Católica Madre y Maestra(PUCMM)10103Santo DomingoDominican Republic LMGC IMT Mines AlesUniv MontpellierCNRS30100AlèsFrance Facultad de Ingeniería y Ciencias Universidad Adolfo Ibañez2520000Viña del MarChile Centro de Desarrollo Energético Antofagasta(CDEA) Universidad de Antofagasta1240000AntofagastaChile

Phase change materials(PCMs) designate materials able to store latent *** change state from solid to liquid over a defined temperature *** process is reversible and can be used for thermo-technical *** present paper aims to study the thermal performance of an inorganic eutectic PCM integrated into the rooftop slab of a test room and analyze its potential for building thermal *** experiment is conducted in two test rooms in Antofagasta(Chile) during summer,fall,and *** PCM is integrated into the rooftop of the first test room,while the roof panel of the second room is a sealed air *** work introduces a numerical model,which is built using the finite difference method and used to simulate the rooms' thermal *** thermal simulations of the PCM room are performed for other Chilean locations to evaluate and compare the capability of the PCM panel to store latent heat thermal energy in different *** show that the indoor temperature of the PCM room in Antofagasta varies only 21.1℃±10.6℃,while the one of the air-panel room varies 28.3℃±18.5℃.Under the experiment's conditions,the PCM room's indoor temperature observes smoother diurnal fluctuations,with lower maximum and higher minimum indoor temperatures than that of the air-panel *** simulations in other cities show that the PCM panel has a better thermal performance during winter,as it helps to maintain or increase the room temperature by some degrees to reach comfort *** demonstrates that the implementation of such PCM in the building envelope can effectively reduce space heating and cooling needs,and improve indoor thermal comfort in different climates of Chile.

关键词： phase change material thermal energy storage building space heating and cooling energy efficiency designbuilder

来源：

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

Saccharomyces cerevisiae I-3856 in irritable bowel syndrome with predominant constipation

引用

World Journal of Gastroenterology 2022年第22期28卷 2509-2522页

作者： Florian Mourey Amélie Decherf Jean-françois Jeanne Mathieu Clément-Ziza Marie-Lise Grisoni françois Machuron Sophie Legrain-Raspaud Arnaud Bourreille pierre Desreumaux Research and Applications Department Gnosis by LesaffreLesaffre GroupMarcq-en-Baroeul 59700France Data Science and Bioinformatics Laboratory Research and Development DepartmentLesaffre InternationalLesaffre GroupMarcq-en-Baroeul 59700France Institut des Maladies de l'Appareil Digestif Centre Hospitalier Universitaire de NantesNantes 44093France Institute for Translational Research in Inflammation Centre Hospitalier Universitaire de LilleLille 59000France

BACKGROUND Probiotics are a promising solution for managing irritable bowel syndrome(IBS).Saccharomyces cerevisiae(***)I-3856 has already demonstrated beneficial effects in IBS subjects,particularly in IBS with predominant constipation(IBS-C).AIM To confirm the efficacy of *** I-3856 in the management of gastrointestinal symptoms in *** A randomized,double-blind,placebo-controlled clinical study was performed in a total of 456 *** a run-in period,subjects were randomly assigned to the group receiving *** I-3856(8×109 CFU daily)or the placebo for 8 wk,and they performed daily self-evaluations of gastrointestinal *** primary objective was to assess the effect of the probiotic on abdominal *** secondary objectives were the evaluation of other gastrointestinal symptoms,bowel movement frequency and consistency,and quality of life(QOL).RESULTS A significantly higher proportion of abdominal pain responders was reported in the Probiotic group(45.1%vs 33.9%,P=0.017).A nonsignificant difference in the area under the curve for abdominal pain over the second month of supplementation was observed in subjects receiving probiotic vs placebo[P=0.073,95%CI:-0.59(-1.23;0.05)].No statistically significant differences were reported in the evolution of bowel movement frequency and stool consistency between the *** 8 wk of supplementation,the overall QOL score was significantly higher in the Probiotic group than in the Placebo group[P=0.047,95%CI:3.86(0.52;7.20)].Furthermore,exploratory analyses showed statistically significant and clinically relevant improvements in QOL scores in abdominal pain responders vs *** The results of this clinical study confirmed the abdominal pain alleviation properties of *** I-3856 in *** pain relief was associated with improved *** identifier:NCT03150212.

关键词： Probiotic Yeast Saccharomyces cerevisiae Irritable bowel syndrome Abdominal pain Quality of life

来源：

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

COVID-19 and flu:conserved or specific immune signature?

引用

Cellular & Molecular Immunology 2021年第2期18卷 245-246页

作者： Christophe Paget françois Trottein Centre d’Etude des Pathologies Respiratoires INSERM U1100Universitéde ToursFacultéde Médecine de Tours37000ToursFrance Centre d’Infection et d’Immunitéde Lille INSERM U1019CNRS UMR 9017Universitéde LilleCHU LilleUMS 2014-PLBSU1019Institut Pasteur de Lille59000LilleFrance

Respiratory viruses are a major cause of infectious disease and mortality *** respiratory viruses,emerging and well-known coronaviruses and influenza viruses cause seasonal epidemics and pandemics and rank as very important *** clinical signs of viral respiratory infections range from asymptomatic forms to life-threatening acute respiratory distress syndrome(ARDS,associated with a high mortality rate).Another reported cause of mortality is multiple organ *** ongoing pandemic of coronavirus disease 19(COVID-19,caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2))is a serious public health ***-CoV-2 infection induces to a clinical signature distinct from that associated with other types of pneumonia,and SARS-CoV-2 differs from influenza viruses with regard to target cells and replicative *** morbidity and mortality rates are higher for COVID-19 than for seasonal influenza.

关键词： mortality acute respiratory

来源：

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

Upper gastrointestinal bleeding due to left side portal hypertension after pancreatic surgery

引用

Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 81-84页

作者： pierre Mayer Emanuele Felli Iulian Enescu françois Habersetzer Simona Tripon Department of Hepatology and Gastroenterology Pôle Hépato-digestifNouvel Hôpital CivilHôpitaux Universitaires de Strasbourg(HUS)StrasbourgFrance Institut Hospitalo-universitaire(IHU)de Strasbourg Pôle Hépato-digestifStrasbourgFrance Department of Hepato-biliary and Pancreatic surgery Pôle Hépato-digestifNouvel Hôpital CivilHUSStrasbourgFrance Institut des Maladies Virales et Hépatiques Inserm U1110Universitéde StrasbourgFacultéde MédecineStrasbourgFrance Department of Interventional Radiology Pôle d’imagerieNouvel Hôpital CivilHUSStrasbourgFrance

Left-side portal hypertension(LSPH)is a rare cause of intraabdominal venous *** most of cases,LSPH is due to pancreatic diseases,especially chronic pancreatitis,but it is also described in other abdominal diseases(i.e.,retroperitoneal fibrosis or perineal abscess)after abdominal surgery(i.e.,pancreatic surgery,liver transplantation)or endovascular procedures[1–4].

关键词： hypertension surgery diseases

来源：

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

Deep excavation of the impact from endogenous and exogenous uncertaintieson long-term energy planning

引用

Energy and AI 2023年第1期11卷 150-160页

作者： Xiang Li françois Maréchal Industrial Process and Energy Systems Engineering Ecole Polytechnique Fédérale de LausanneRue de l’industrie 17Sion1950Switzerland

Endogenous and exogenous uncertainties exert significant influences on energy planning. In this study,we propose a systematic methodology to excavate the uncertainty space, by combining mix-integer linearprogramming (MILP), Monte Carlo simulation, and machine learning for quantification of the uncertaintyimpacts on a national-level energy system from global and local perspectives. This approach allows in-depthcorrelation analysis highlighting potential synergies and risks in the energy transition, and can be easily applie for assisting policy making. The case study for Switzerland shows that both carbon neutrality (even negativeemissions) and energy autonomy can be achieved by 2050, but the energy system’s configuration variessignificantly under uncertainty. Through conditional distribution analyses, carbon capture and storage (CCS),Photovoltaic (PV), and wood gasification show the most strong correlation for decarbonization. This study isbased on the whole uncertainty space taking into account heterogeneous uncertainties, leading to increasedreliability compared to sensitivity analysis from single scenarios’ comparisons. The synergy between energymodels and artificial intelligence (AI) is promising to be widely applied in energy planning area, particularlyfor emerging technologies with large uncertainty in development.

关键词： Uncertainty Energy planning Monte Carlo simulation Machine learning

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：