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Relevant bibliographies by topics / Biological heterogeneity / Dissertations / Theses

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Dissertations / Theses on the topic 'Biological heterogeneity'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Hodgkinson, Arran. "Mathematical Methods for Modelling Biological Heterogeneity." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS119.

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Les processus biologiques sont des phénomènes complexes, multi-échelles, présentant une hétérogénéité importante à travers l’espace, la structure et la fonction. De plus, ils impliquent des événements fortement corrélés et présentent des boucles de rétroaction à travers les échelles. Dans cette thèse, nous utilisons des représentations spatio-structuro-temporelles en grande dimension pour étudier l'hétérogénéité biologique à travers l'espace, la fonction biologique et le temps, et appliquons cette méthode à divers problèmes importants en biologie et en clinique.Nous commençons par introduire u

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2

Au, Y. C. "Synthesising heterogeneity : trends of visuality in biological sciences, circa 1970s-2000s." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1478180/.

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This is a case study of diagrams in a field of biological mechanism research (apoptosis), revealing that mechanism diagrams play a crucial role in the practice of developing mechanistic explanations for cell biology. This thesis supports and extends the existing literature in the following aspects: the relationship between scientific representation and practice (Daston and Galison, 2007), inter-field and inter-level integration in biological practice of mechanism research (Bechtel, 2006; Craver and Darden, 2013), and the assertive and engaging power of diagrams (Bender and Marrinan, 2010; Wood

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3

Mahajan, Vinay Subhash. "Intrinsic heterogeneity in the survival and proliferation capacities of naïve CD8⁺ T cells." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/61227.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biological Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 125-137).<br>This thesis describes the identification and characterization of a novel 'layer' of intrinsic non-genetic functional heterogeneity within the seemingly homogeneous naive CD8⁺ T cell population in their survival and proliferation capacities. This heterogeneity is predictably marked by the surface level of CD5. NaYve CD8⁺ T cells that are also CD5hi have a greater intrinsic capacity to proliferate both in r

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4

Kendall, Bruce Edward. "Spatial structure and transient periodicity in biological dynamics." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187496.

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Structure, in its many forms, is a central theme in theoretical population ecology. At a mathematical level, it arises as nonuniformities in the topology of nonlinear dynamical systems. I investigate a mechanism wherein a chaotic time series can have episodes of nearly periodic dynamics interspersed with more 'typical' irregular dynamics. This phenomenon frequently appears in biological models, and may explain patterns of alternating biennial and irregular dynamics in measles epidemics. I investigate the interaction between spatial structure and density-dependent population regulation with a s

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5

Reid, Michael Steven. "The Role of Heterogeneity in Rhythmic Networks of Neurons." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14565.

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Engineers often view variability as undesirable and seek to minimize it, such as when they employ transistor-matching techniques to improve circuit and system performance. Biology, however, makes no discernible attempt to avoid this variability, which is particularly evident in biological nervous systems whose neurons exhibit marked variability in their cellular properties. In previous studies, this heterogeneity has been shown to have mixed consequences on network rhythmicity, which is essential to locomotion and other oscillatory neural behaviors. The systems that produce and control thes

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6

du, Plessis Darren Scott. "Temporal interactions with flamingo foraging plasticity: ecological effects on basal resources and benthic heterogeneity." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29623.

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The role of predation as a structuring agent of communities has been a focal area of research in marine ecology. Conversely, studies focusing on foraging plasticity, particularly by shorebirds, and consequences for benthic community structure, heterogeneity and ecosystem functioning have been limited in marine soft-sediments. Temporal interactions with foraging plasticity is an even greater knowledge gap. The primary goal of this dissertation was to expand on current understanding of foraging plasticity and the broader ecological role of Greater Flamingos as predators in marine sedimentary eco

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7

Donnelly, Robert Kevin. "An investigation of genetic heterogeneity in a biological sentinel species (Lumbricus rubellus)." Thesis, University of South Wales, 2011. https://pure.southwales.ac.uk/en/studentthesis/an-investigation-of-genetic-heterogeneity-in-a-biological-sentinel-species-lumbricus-rubellus(ab114364-d43b-49c2-b309-6cecd95dcaf2).html.

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Studies have indicated the existence of several possible sources of genetic heterogeneity within the sentinel species Lumbricus rubellus that could compromise its suitability for ecotoxicological assessment. The species appears to consist of two genetically divergent cryptic lineages and has been demonstrated to display genetic adaptation towards contaminants within some populations. In order to investigate the cryptic lineages of L rubellus further a combined morphological and DNA barcoding approach was undertaken, with both the mitochondria! COI gene being sequenced and external morphologica

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8

Parry-Jones, Nilima. "The clinical and biological heterogeneity of mantle cell lymphoma presenting with leukaemia." Thesis, Institute of Cancer Research (University Of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408862.

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9

Rennerfeldt, Deena Antoinette. "Toward understanding and mitigating heterogeneity in bone marrow stromal cell cultures for improved therapeutic efficacy." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121873.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Biological Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Bone marrow stromal cells (BMSCs), a subset of which are considered mesenchymal stem cells (MSCs), have been used in over 600 clinical trials for indications ranging anywhere from autism to liver cirrhosis to diabetes. They have cited enthusiasm in the cell therapy community not only for their demonstrated differentiation potential toward several lineages, but also due to the anti-inflammatory and immunomodulatory

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10

Habashy, Hany Onsy Fouad Ibrahim. "The biological heterogeneity of oestrogen receptor positive breast cancer and its phenotypic characterisation." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/29131/.

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Although global gene microarray studies have demonstrated the molecular heterogeneity of breast cancer (BC) and provided potential for clinical applications, the molecular subclassification of luminal/ER-positive tumours, which is the largest class of BC, remains unclear. Characterisation of luminal/ER-positive subtypes could have important implications in clinical decision-making and patient management. The patient study cohort is derived from a consecutive series of approximately 1902 cases of primary operable invasive breast carcinoma obtained from the Nottingham Tenovus Primary Breast Carc

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11

Wijeyekoon, Ruwani Shamila. "The biological basis of heterogeneity in Parkinson's disease : insights from an innate immune perspective." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/283202.

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The biological basis of the clinical heterogeneity in Parkinson's Disease (PD) is unclear. It is likely to involve complex interactions between genetic and environmental factors and between a range of pathological processes, including protein homeostasis and immune system function. Microglial activation in the brain and peripheral innate immune changes are known to occur in PD. Recently genetic, animal and cellular studies have linked several innate immune related genes and proteins (e.g. HLADR, TREM2, TLR2, TLR4, caspase-1) to PD and provided evidence that they may have a role in PD pathogene

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12

Mars, Becky. "Parents with recurrent depression : heterogeneity in course, severity and symptoms as risks for offspring depression." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/47077/.

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Depression is a significant global problem and is among the leading causes of disability worldwide. Depression in children and adolescents is associated with wide-ranging impairments and often marks the beginning of a lifelong, chronic illness. Early treatment and prevention of depression is therefore a major public health concern. Parental depression is one of the most consistently identified risk factors for depression in young people. Although depression is a highly heterogeneous disorder, most studies examining cross-generational depression risk have simply dichotomised parents into ‘depre

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13

Yukinaga, Hiroko. "Slow fluctuation of Rac1 activity is associated with biological and transcriptional heterogeneity of glioma cells." Kyoto University, 2014. http://hdl.handle.net/2433/189348.

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14

Wu, Chiung Ting. "Machine Learning Approaches for Modeling and Correction of Confounding Effects in Complex Biological Data." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/103739.

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With the huge volume of biological data generated by new technologies and the booming of new machine learning based analytical tools, we expect to advance life science and human health at an unprecedented pace. Unfortunately, there is a significant gap between the complex raw biological data from real life and the data required by mathematical and statistical tools. This gap is contributed by two fundamental and universal problems in biological data that are both related to confounding effects. The first is the intrinsic complexities of the data. An observed sample could be the mixture of mult

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15

Murakami, Hiroshi. "Morphological and biological heterogeneity of three tumorigenic cell lines derived from a single p53-/- osteoblast-like cell line, MMC2." Kyoto University, 2003. http://hdl.handle.net/2433/149371.

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Ghebre, Michael Abrha. "A statistical framework for modeling asthma and COPD biological heterogeneity, and a novel variable selection method for model-based clustering." Thesis, University of Leicester, 2016. http://hdl.handle.net/2381/38488.

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This thesis has two main parts. The first part is an application that focuses on the identification of a statistical framework to model the biological heterogeneity of asthma and COPD using sputum cytokines. Clustering subjects using the actual cytokines measurements may not be straightforward as these mediators have strong correlations, which are currently ignored by standard clustering techniques. Artificial data, which have similar patterns as the cytokines, but with known class membership, are simulated. Several approaches, such as data reduction using factor analysis, were performed on th

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17

Jorge, Vilhena Cláudia Sofia [Verfasser], and Kirsten [Akademischer Betreuer] Jung. "Phenotypic heterogeneity and the biological significance of a pyruvate sensing network in Escherichia coli / Cláudia Sofia Jorge Vilhena ; Betreuer: Kirsten Jung." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1159879745/34.

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18

Gilbert, Mark. "Modelling species invasions in heterogeneous landscapes." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:944d15d3-257a-47e5-acb9-9bdfba26985b.

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Biological invasions are devastating ecosystems and economies world-wide, while many native species' survival depends on their ability to track climate change. Characterising the spread of biological populations is therefore of utmost importance, and can be studied with spatially explicit, discrete-time integro-difference equations (IDEs), which reflect numerous species' processes of demography and dispersal. While spatial variation has often been ignored when implementing IDE models, real landscapes are rarely spatially uniform and environmental variation is crucial in determining biological

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19

Gómez, Jesús Enrique. "Role of spatial and temporal vegetation heterogeneity from fire-grazing interactions to the assembly of tallgrass prairie spider communities." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/34672.

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Doctor of Philosophy<br>Department of Biology<br>Anthony Joern<br>North American tallgrass prairie is a dynamic ecosystem that evolved with variable regimes of fire and grazing interactions (pyric herbivory), and variable mid-continental weather. Combined, these ecological factors create a shifting mosaic of plant communities that create heterogeneous and structurally complex habitats that move around across the landscape in time and space. The overarching goal of my dissertation was to study how bottom-up habitat templates created in response to fire-grazing interactions influence the communi

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Bosem, Aliette [Verfasser], Teja [Akademischer Betreuer] Tscharntke, Yann Pd [Gutachter] Clough, and Stefan [Gutachter] Vidal. "Landscape heterogeneity affects arthropod functional diversity and biological pest control / Aliette Bosem (geb. Baillod) ; Gutachter: Yann Pd Clough, Stefan Vidal ; Betreuer: Teja Tscharntke." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1149958995/34.

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21

Saeed, Anas Amjad Mohammad. "Use of multiple platform 'omics' datasets to define new biomarkers in oral cancer and to determine biological processes underpinning heterogeneity of the disease." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/11730.

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Oral cancer in early stages (I and II) may be curable by surgery or radiation therapy alone but advanced stage disease (III and IV) has a relatively low survival rate. The pathogenic pathways that contribute to Oral Squamous Cell Carcinoma (OSCC) remain poorly characterised and the critical factor in the lack of prognostic improvement is that a significant proportion of cancers initially are asymptomatic lesions and are not diagnosed or treated until they reach an advanced stage. Hence, a clinically applicable gene expression signature is in high demand and improved characterization of the OSC

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22

Huynh, Huy. "Estimating the maximum probability of categorical classes with applications to biological diversity measurements." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44868.

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The study of biological diversity has seen a tremendous growth over the past few decades. Among the commonly used indices capturing both the richness and evenness of a community, the Berger-Parker index, which relates to the maximum proportion of all species, is particularly effective. However, when the number of individuals and species grows without bound this index changes, and it is important to develop statistical tools to measure this change. In this thesis, we introduce two estimators for this maximum: the multinomial maximum and the length of the longest increasing subsequence. In both

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23

Reuzé, Sylvain. "Extraction et analyse de biomarqueurs issus des imageries TEP et IRM pour l'amélioration de la planification de traitement en radiothérapie." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS341/document.

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Au-delà des techniques conventionnelles de diagnostic et de suivi du cancer, l’analyse radiomique a pour objectif de permettre une médecine plus personnalisée dans le domaine de la radiothérapie, en proposant une caractérisation non invasive de l’hétérogénéité tumorale. Basée sur l’extraction de paramètres quantitatifs avancés (histogrammes des intensités, texture, forme) issus de l’imagerie multimodale, cette technique a notamment prouvé son intérêt pour définir des signatures prédictives de la réponse aux traitements. Dans le cadre de cette thèse, des signatures de la récidive des cancers du

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Miranda-Melo, Aneliza de Almeida. "Composição floristica da comunidade arboreo-arbustiva de floresta ciliar do rio Piedosa e Brejinho em Juramento, norte de Minas Gerais, e a influencia de fatores ambientais na distribuição das especies." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315638.

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Orientador: Flavio Antonio Maes dos Santos<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-13T16:34:14Z (GMT). No. of bitstreams: 1 Miranda-Melo_AnelizadeAlmeida_D.pdf: 26708598 bytes, checksum: 92412a838a8b46457938c15a64a10605 (MD5) Previous issue date: 2009<br>Resumo: Uma das questões básicas em ecologia é tentar entender quais são e em quais escalas os fatores ambientais influenciam a distribuição das espécies. Assim, as variações espaciais da distribuição de espécies arbóreo-arbustivas e da diversidade, bem como suas r

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Santos, Francisca Ana Soares dos. "Modelos de dinâmica metapopulacional espacialmente implícitos." Laboratório Nacional de Computação Científica, 2007. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=122.

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Uma metapopulação pode ser definida como uma população regional de populações locais geograficamente distintas, interconectadas por migração. Dentro deste contexto, modelos de dinâmica metapopulacional espacialmente implícitos descrevem a taxa de variação da proporção de manchas ocupadas por uma ou mais espécies por meio de um balanço entre os processos de colonização de manchas vazias e extinção de manchas ocupadas. O modelo metapopulacional de Levins prevê que mesmo na presença de habitat adequado, uma espécie pode se extinguir regionalmente, de forma determinística, se a intensidade de exti

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26

Blank, Ulrich. "Caracterisation biochimique et purification des immunoglobulin-g-binding factors (igg-bf) murins." Paris 7, 1987. http://www.theses.fr/1987PA077005.

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Les lymphocytes t, porteurs de recepteurs fc, produisent des facteurs de liaison d'immunoglobuline g (igg-bf) qui se lient a la fraction fc des igg et suppriment leur production par les lymphocytes b. L'igg-bf apparait heterogene en poids moleculaire et en charge. Il est n- et o-glycosyli. A l'aide de l'anticorps monoclonal anti-rf::(c)gamma , 2-4g2, il a ete etabli que l'igg-bf porte des sites antigeniques commun avec le rfcgamma , un dosage radioimmunologique a ete developpe sur nitrocellulose. Apres differentes etapes de purification par chromatographie, l'heterogeneite a ete confirmee

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Bailleul, Serge. "Heterogeneite des recepteurs aux oestrogenes et a la progesterone dans les tumeurs mammaires humaines : relation avec l'hormonodependance." Caen, 1988. http://www.theses.fr/1988CAEN2026.

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28

Niva, Mikael. "Life History Strategies in Linnaea borealis." Doctoral thesis, Uppsala : University Library : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3604.

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29

Biasi, Cristiane. "MACROINVERTEBRADOS ASSOCIADOS ÀS FOLHAS EM DECOMPOSIÇÃO DE RIACHOS NEOTROPICAIS: INFLUÊNCIA DA QUALIDADE QUÍMICA, VARIEDADE DE ESPÉCIES VEGETAIS, BIOMASSA DE FUNGOS E TEMPO DE EXPOSIÇÃO." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/5304.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In low-order freshwater ecosystems, macroinvertebrates have an important role in nutrient cycling, as they participate in the shredding of detritus, which are the main energy source for the trophic chain in these systems. This study aims to investigate the macroinvertebrate fauna associated to leaves of different plant species with different concentrarions of LigCel:N. Thus, we carried out four treatments. The first included Casearea sylvestris leaves and the second a mixture of C. sylvestris, Rollinia emarginata, Phytolacca dioica

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Potier, Marie-Claude. "Heterogeneite des recepteurs des benzodiazepines : etudes biochimiques et pharmacologiques." Paris 6, 1988. http://www.theses.fr/1988PA066488.

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Etude de molecules "hybrides" benzodiazepine-beta-carboline concues d'apres les modeles theoriques postulant l'existence de sites de liaison differents pour les benzodiazepines et les beta-carbolines sur un meme recepteur. Seules les molecules hybrides ayant a la fois les elements finis structuraux necessaires a la liaison des benzodiazepines et de beta-carbolines se lient aux recepteurs des benzodiazepines avec une forte affinite

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Escarpinati, Suzana Cunha. "Composição e dinâmica da família Chironomidae em dois períodos hidrológicos distintos, durante o ciclo fenológico de Mayaca fluviatilis Aublet, 1775." Universidade Federal de São Carlos, 2006. https://repositorio.ufscar.br/handle/ufscar/1914.

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Made available in DSpace on 2016-06-02T19:31:36Z (GMT). No. of bitstreams: 1 DissSCE.pdf: 723485 bytes, checksum: 1757119ef02fa2dba80ba1297f9fd16b (MD5) Previous issue date: 2006-08-29<br>The studied lake (Lagoa Mayaca) is located in a preservation area at the campus of the Universidade Federal de São Carlos. With the aim of analyzing the dynamic and the taxonomic composition of the Chironomidae, samples were taken through a transversal transect in two different periods (dry and wet season), comprehending the phenological cycle of Mayaca fluviatilis Aublet, 1775. From a total of 27 Chironomi

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Sponchiado, Jonas. "ESTRUTURA DAS COMUNIDADES DE PEQUENOS MAMÍFEROS DE DUAS UNIDADES DE CONSERVAÇÃO (TAIM E ESPINILHO) DO BIOMA PAMPA, SUL DO BRASIL." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/5273.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The small-mammal community structure of two conservation unit (CUs), Taim Ecological Station (TES) and Espinilho State Park (ESP), of the Pampa biome in southern Brazil, was investigated and compared regarding species richness, composition and abundance. Additionally, a Deciduous forest area was compared with those ones. For this purpose, ten transects with live-traps pitfall traps were used. In addition, sixteen environmental variables were measured in the TES to verify the small-mammal micro-spatial distribution. During six fie

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Rother, Débora Cristina. "Dispersão de sementes e processos de limitação demográfica de plantas em ambientes com e sem bambus na Floresta Pluvial Atlântica /." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/100665.

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Resumo: Em florestas tropicais, ainda são incipientes os estudos que tratam da influência dos bambus na dinâmica da vegetação. Pela grande capacidade de se expandir rapidamente no ambiente seja por crescimento vegetativo ou por produção massiva de sementes, os bambus promovem alterações significativas na estrutura das comunidades vegetais. Desta forma, esse estudo teve como objetivo avaliar o ciclo de vida das plantas em ambientes com (B) e sem bambus (SB) em uma área de floresta Atlântica densamente ocupada pelo bambu nativo Guadua tagoara. Os objetivos específicos deste estudo foram separado

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Vieira, Raísa Romênia Silva. "Efeitos locais e regionais na estruturação de comunidades de anuros em paisagens de agropecuária." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/3464.

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Submitted by Erika Demachki (erikademachki@gmail.com) on 2014-10-29T10:19:06Z No. of bitstreams: 2 Dissertação - Raísa Romênia Silva Vieira - 2014.pdf: 1011765 bytes, checksum: 06f099206f2cd97d31e4cd7702e94f21 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-10-30T10:18:15Z (GMT) No. of bitstreams: 2 Dissertação - Raísa Romênia Silva Vieira - 2014.pdf: 1011765 bytes, checksum: 06f099206f2cd97d31e4cd7702e94f21 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86

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Neves, Kelle Cristina. "AVALIAÇÃO DA RIQUEZA E ABUNDÂNCIA DE ESPÉCIES DE MAMÍFEROS DE MÉDIO E GRANDE PORTE EM FRAGMENTOS FLORESTAIS NO MUNICÍPIO DE GOIÂNIA, GOIÁS, BRASIL." Pontifícia Universidade Católica de Goiás, 2012. http://localhost:8080/tede/handle/tede/2512.

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Made available in DSpace on 2016-08-10T10:44:20Z (GMT). No. of bitstreams: 1 KELLE CRISTINA NEVES.pdf: 3431567 bytes, checksum: 6ee056d8d330d81803f7751576f273da (MD5) Previous issue date: 2012-08-15<br>The landscape constantly changed, caused mainly by human activities, have affected the size, shape and frequency of the landscape elements, and these fragmentation effects have been some of the major threats to biodiversity and changes in species behavior. This study was made in urban forest fragments in the city of Goiania, Goias with the intention of evaluating the richness, the abundance of

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Saulino, Hugo Henrique Lanzi. "Entomofauna aquática do Ribeirão das Anhumas (Bacia hidrográfica do Rio Mogi-Guaçú, SP) : influência do represamento e do uso da terra na estrutura da comunidade." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/2063.

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Made available in DSpace on 2016-06-02T19:32:02Z (GMT). No. of bitstreams: 1 4290.pdf: 2504541 bytes, checksum: f44f9691df69aedba30bdbb41b8c7ba7 (MD5) Previous issue date: 2012-02-29<br>Financiadora de Estudos e Projetos<br>Changes in river basins such as the deforestation of riparian vegetation, the expansion of agricultural activities and construction of dams, are examples of anthropogenic interference, which interferes with the diversity of aquatic insects in streams and rivers. This study aimed to investigate the distribution patterns of communities of aquatic insects in a longitudinal p

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Neves, Frederico de Siqueira. "Efeitos da estrutura do habitat sobre insetos herbívoros associados ao dossel." Universidade Federal de Viçosa, 2005. http://locus.ufv.br/handle/123456789/3993.

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Made available in DSpace on 2015-03-26T13:30:52Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1172659 bytes, checksum: 09e26b53f58c9c16cf0b8c9ceaf76d98 (MD5) Previous issue date: 2005-02-21<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The canopy of tropical forests offers a large diversity of resources that are essential for the maintenance of the biodiversity. There is a lack of studies on the effects of canopy habitat structure upon herbivorous communities, mainly at tropical regions. The aim of this study was to answer why herbivorous insect diversity varies with

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Lipinski, Victor Mendes. "ESTRUTURA ESPACIAL DE COMUNIDADES DE ANUROS DE DUAS REGIÕES FISIOGRÁFICAS DO BIOMA PAMPA." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/5299.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this study, we sampled two anuran communities in two physiographic regions of the Pampa biome, Serra do Sudeste and Depressão Central, were made monthly campaigns during the period between September 2011 and August 2012 where there were registered 25 species of frogs. Scinax granulatus, Physalaemus gracilis e Pseudis minuta were the most abundant species in the Serra do Sudeste, while Dendropsophus minutus, D. sanborni and Scinax squalirostris were the most abundant of the Depressão Central. We recorded 15 species of frogs in th

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Oliveira, Vívian Campos de. "Macroinvertebrados associados a folhiço em um córrego de Mata Atlântica no sudeste do Brasil." Universidade Federal de Juiz de Fora (UFJF), 2010. https://repositorio.ufjf.br/jspui/handle/ufjf/2628.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-09-30T13:49:53Z No. of bitstreams: 1 viviancamposdeoliveira.pdf: 858830 bytes, checksum: 012b1d517d1aebd78cf45260b06e4e9a (MD5)<br>Approved for entry into archive by Diamantino Mayra (mayra.diamantino@ufjf.edu.br) on 2016-09-30T13:53:40Z (GMT) No. of bitstreams: 1 viviancamposdeoliveira.pdf: 858830 bytes, checksum: 012b1d517d1aebd78cf45260b06e4e9a (MD5)<br>Made available in DSpace on 2016-09-30T13:53:40Z (GMT). No. of bitstreams: 1 viviancamposdeoliveira.pdf: 858830 bytes, checksum: 012b1d517d1aebd78cf45260b06e4e9a (MD5) Previous

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Xavier, Rafael de Oliveira. "Determinant factors to the dominance of African grasses in two tropical seasonally dry ecosystems." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7628.

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Submitted by Bruna Rodrigues (bruna92rodrigues@yahoo.com.br) on 2016-09-23T12:19:28Z No. of bitstreams: 1 TeseROX.pdf: 7952920 bytes, checksum: c9bec750659bfd91644c4567e41eb2d5 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-04T17:59:10Z (GMT) No. of bitstreams: 1 TeseROX.pdf: 7952920 bytes, checksum: c9bec750659bfd91644c4567e41eb2d5 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-04T17:59:18Z (GMT) No. of bitstreams: 1 TeseROX.pdf: 7952920 bytes, checksum: c9bec750659bfd91644c4567e41eb2d5 (MD5)<br>Made a

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Bolzan, Ana Maria Rigon. "DIVERSIDADE E PADRÕES DE USO DO ESPAÇO DE ANFÍBIOS ANUROS DA ÁREA DE PROTEÇÃO AMBIENTAL DO IBIRAPUITÃ." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/5323.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Studies of biodiversity surveys and habitat requirements are essential in landscapes threatened by anthropogenic conversion, such as those that make up the Pampa biome. In the present study we determined the spatial distribution of richness of anurans at the Área de Proteção Ambiental (APA) do Ibirapuitã, the largest protected federal area within the Pampa biome in Brazil. Thus we: (1) describe the composition of anuran community regarding species richness, abundance, constancy of occurrence and reproductive modes; (2) compare the

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Machado, Paulo Henrique Damasceno. "Efeito da sazonalidade sobre as populações de três espécies de pequenos mamíferos não voadores ocorrentes no limite sul de distribuição da Mata Atlântica." Universidade do Vale do Rio dos Sinos, 2012. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4011.

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Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2015-06-25T15:58:23Z No. of bitstreams: 1 PauloH.D.Machado.pdf: 795005 bytes, checksum: 03018293cef47592c176e954e9ce2228 (MD5)<br>Made available in DSpace on 2015-06-25T15:58:23Z (GMT). No. of bitstreams: 1 PauloH.D.Machado.pdf: 795005 bytes, checksum: 03018293cef47592c176e954e9ce2228 (MD5) Previous issue date: 2012<br>Nenhuma<br>Uma das hipóteses para explicar a diversidade da fauna associada a florestas tropicais é a variedade de recursos abióticos e alimentares, os quais podem ser influenciados pelas variações da het

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Lucena, Isabela Codolo de. "Ecologia populacional de espécies lenhosas clonais em savana neotropical." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/1800.

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Made available in DSpace on 2016-06-02T19:29:57Z (GMT). No. of bitstreams: 1 5173.pdf: 2537344 bytes, checksum: 189e9f5fe14dc2946f00d093ab36ee54 (MD5) Previous issue date: 2013-04-12<br>Universidade Federal de Sao Carlos<br>The aims of this thesis were: to investigate the heterogeneity of soils and to evaluate the contribution of clonal growth to the population dynamics of woody species under contrasting soil conditions. In the Cerrado-Pantanal ecotone (15º43 S; 56º04 W), the soil possesses typical features from both the soil of Cerrado in the Central Plateau and the soil of the Pantanal Pl

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Righetto, Ricardo Diogo 1986. "Validation of structural heterogeneity in Cryo-EM datasets by cluster ensembles = Validação de heterogeneidade estrutural em dados de Crio-ME por comitês de agrupadores." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259094.

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Orientadores: Fernando José Von Zuben, Rodrigo Villares Portugal<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-25T22:36:38Z (GMT). No. of bitstreams: 1 Righetto_RicardoDiogo_M.pdf: 5898819 bytes, checksum: c98b9e2b61390aa847a4a6040d3f550b (MD5) Previous issue date: 2014<br>Resumo: Análise de Partículas Isoladas é uma técnica que permite o estudo da estrutura tridimensional de proteínas e outros complexos macromoleculares de interesse biológico. Seus dados primários consistem em imagens de

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Lima, Luciana Signorelli Faria. "A conservação da diversidade de anuros no cerrado brasileiro." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tde/3018.

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Submitted by Jaqueline Silva (jtas29@gmail.com) on 2014-09-04T21:36:39Z No. of bitstreams: 2 Luciano Signorelli Faria Lima.pdf: 6489666 bytes, checksum: ffffa86e79bc4373bbb31a31eac21136 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Made available in DSpace on 2014-09-04T21:36:39Z (GMT). No. of bitstreams: 2 Luciano Signorelli Faria Lima.pdf: 6489666 bytes, checksum: ffffa86e79bc4373bbb31a31eac21136 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2014-07-28<br>Land use activities have been freque

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Amarante, Débora Delevati do. "DISTRIBUIÇÃO ESPAÇO-TEMPORAL DE COMUNIDADES DE GIRINOS (AMPHIBIA: ANURA) NO CERRADO SUL-MATO-GROSSENSE." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/11183.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>We studied species richness, abundance and spatial-temporal distribution of tadpole communities in eight ponds in an area of Cerrado in the state of Mato Grosso do Sul, Brazil. We carried out this study during a rainy season (October 2009 to March 2010). We determined the spatial and temporal niche breadth by standardized Levins index, and we used null models to explore the patterns of niche overlap. Additionally, we evaluated the influence of environmental descriptors and spatial distribution of ponds on the studied communities us

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Ara?jo, Nicholas Sebastian Aires de. "Os efeitos da estrutura de habitat sobre as comunidades de aranhas em uma floresta de caatinga do nordeste brasileiro." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14056.

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Made available in DSpace on 2014-12-17T14:33:11Z (GMT). No. of bitstreams: 1 NicholasSAA_DISSERT.pdf: 1948030 bytes, checksum: 80dfd0f7427129fc2bc508e3309bfdb3 (MD5) Previous issue date: 2013-08-28<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>The inherent complexity of natural communities is a challenge to our understanding about how the habitat influences the abundance, local distribution and species diversity. The habitat can influence community structure in multiple ways and elucidate these relationships has provoked a lot of debate in ecology. The habitat heterogen

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Silva, Adilson de Oliveira. "Análise comparativa dos nichos espacial e alimentar de anuros em áreas de Caatinga e Mata Atlântica de Sergipe, Brasil." Universidade Federal de Sergipe, 2014. https://ri.ufs.br/handle/riufs/4404.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Distinct environmental characteristics can directly affect community structure, they offer varying conditions and resources, which allows each area to establish different groups of species. In this study we analyzed two amphibian assemblages between October 2012 and September 2013 in two areas with different degrees of environmental heterogeneity, one in the Caatinga (Monument Natural Grota do Angico - MNGA ) and the other in the Atlantic Rainforest (Refugio de Vida Silvestre Mata do Junco - RVSMJ), both in the state of Sergipe. We

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Mejetta, Stefania 1984. "1)Jarid2 regulates mouse epidermal stem cell activation and differentiation ; 2)Tumor heterogeneity and metastasis-initiation in human squamous cell carcinoma." Doctoral thesis, Universitat Pompeu Fabra, 2013. http://hdl.handle.net/10803/283482.

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Jarid2 is required for the genomic recruitment of the polycomb repressive complex-2 (PRC2) in embryonic stem cells. However, its specific role during late development and adult tissues remains largely uncharacterized. In this first part of my thesis, we show that deletion of Jarid2 in mouse epidermis reduces the proliferation and potentiates the differentiation of postnatal epidermal progenitors, without affecting epidermal development. In neonatal epidermis, Jarid2 deficiency reduces H3K27 trimethylation, a chromatin repressive mark, in epidermal differentiation genes previously shown

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Rother, Débora Cristina [UNESP]. "Dispersão de sementes e processos de limitação demográfica de plantas em ambientes com e sem bambus na Floresta Pluvial Atlântica." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/100665.

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Made available in DSpace on 2014-06-11T19:30:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-11-30Bitstream added on 2014-06-13T20:21:33Z : No. of bitstreams: 1 rother_dc_dr_rcla.pdf: 2462027 bytes, checksum: c33bd50a18fd50beab5b4f95e4d965a4 (MD5)<br>Em florestas tropicais, ainda são incipientes os estudos que tratam da influência dos bambus na dinâmica da vegetação. Pela grande capacidade de se expandir rapidamente no ambiente seja por crescimento vegetativo ou por produção massiva de sementes, os bambus promovem alterações significativas na estrutura das comunidades vegetais. Des

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