Дисертації з теми "SISTEMATICI"
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Colasante, Michele. "Test sistematici per traduttori di formato." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1252/.
Повний текст джерелаPolinari, Jacopo. "Profili sistematici dell'arbitrato nel diritto amministrativo." Doctoral thesis, Luiss Guido Carli, 2009. http://hdl.handle.net/11385/200738.
Повний текст джерелаMERLO, SARA. "Il mutamento di mansioni. Problemi ricostruttivi e profili sistematici." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1244466.
Повний текст джерелаThe thesis is about the classical theme of the emplojer's jus variandi, that is disciplined by the art. 2103 c.c. Necessity to deal with this theme has sprung from the fact that the relative discipline has been interested by important news. In fact with the art. 3, d.lgs. n. 81 of June 14 th 2015, the legislator has proceeded to complete rewrite art. 2103 c.c. The elaborate has moved on two superimposed levels: o the one hand, I have proceeded to analyzed the new article 2103 c.c.; on the other hand, I tried to analyze the tecnique used by legislator. The thesis has been proposed to give a systematization of the answers already given by the doctrine and jurisprudence on the subject, as well as offering a new questions elaboration; to critically discuss the extent of the recent innovations introduced; to highlight the differences compared to the previous legislation; to establish to what extent a broad exceptability of the art. 2103 c.c. by collective bargaining and individual autonomy, it can open the way for a dogmatic refoundation of the whole subject and a deconstruction of labor legislation as it has been conceived to date. The thesis is divided in three chapters. In the first chapter, I wrote about horizontal jus variandi; the second chapter is about jus variandi in pejus and the last one is about promotion.
TONETTI, STEFANO. "PROFILI SISTEMATICI SULL'ETEROINTEGRAZIONE DEL CONTRATTO NEL PANORAMA GIURIDICO NAZIONALE ED EUROPEO." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/559534.
Повний текст джерелаThis thesis aims to examine the role and limits of the integration of the contract in today's National and European juridical scenery. The study starts with the examination of the sources of integration disciplined in the Civil Code, in order to define its boundaries and the confines of the powers attributed to the judge, taking into consideration the Civil law and Common law systems (such as the French and the English ones), as well as the projects aimed at the harmonization of European legislation. Subsequently ample space is devoted to the mechanism of equitable reduction of the penalty clause and to the debate, developed in doctrine and jurisprudence, around the art. 1384 of the Civil Code, which can now be regarded as an ordinary -and no more exceptional- rule, as a result of an evolutionary interpretation. The research continues with a study about the integration of the "New Contract Law", which generated with the model and influence of the European law and is nowadays working alongside the discipline contained in the Civil Code, allowing its new interpretations. In particular, this section of the thesis involves the Consumer Contracts and the rules about the invalidity of unfair clauses, as well as some profiles of Professional Contracts, to assess the evolution of art. 1374 cc, with special reference to equity.
FERRAGUTO, FEDERICO. "Aspetti metodologici e problemi sistematici dell'introduzione alla dottrina della scienza di J.G. Fichte." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/772.
Повний текст джерелаThe study concerns the development of the introduction to philosophy in J.G. Fichte’s Theory of Knowledge. This problem is considered from both, systematic and historical point of view, as the main instrument for testing the metaphilosohical reflection within the German Idealism. My study aims to show how the relationship between introduction and philosophy exceeds the simply diachronic series of introduction and philosophy, that reduces the introduction to a preparatory exercise. The introduction represents a crucial component for developing a philosophical theory, that remains transcendental even though its aim is a concrete and rational comprehension and modification of the sense of the world. At the same time my study tries to contribute to a better reconstruction of the context of Fichte’s Wissenschaftslehre. The introduction’s themes and terminology permit to focus on philosophical positions discussed by Fichte: Kant’s criticism, logics, psychology, philosophy of language, reflection on the structure and tasks of the academic instruction. The first chapter describes the problem of introduction in the Wissenschaftslehre between 1794 and 1805. The second one reviews the gestation of the same problem in the later Berlin years of the Wissenschaftslehre (1810-1814) by examining the revision’s process of the Wissenschaftslehre that follows the Reden an die deutsche ation (1807-1810). The third one analyses the transcendental significance of the preliminary description of the Wissenschaftslehre that Fichte shows in several lessons between 1810 and 1812. The fourth chapter considers the two greatest series of introductory lessons given by Fichte between 1810 and 1813: Tatsachen des Bewusstseins and Transzendentale Logik. The fifth chapter examines the relationship between the introduction and the Wissenschaftslehre following a systematic point of view, specially considering the presentations of the Wissenschaftslehre given by Fichte from 1811 to 1813. Finally the last chapter tests the systematic significance of philosophizing before philosophy.
Bertoldo, Rachele <1997>. "Il diritto del lavoro dell'emergenza nel settore sanitario: profili sistematici e rilievi problematici." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/20549.
Повний текст джерелаDUCOLI, Giulia. "LA PERSONA OFFESA NELLA FASE DELLE INDAGINI PRELIMINARI. TRA DIRETTIVA EUROPEA ED EQUILIBRI SISTEMATICI INTERNI." Doctoral thesis, Università degli studi di Ferrara, 2022. https://hdl.handle.net/11392/2497137.
Повний текст джерелаThere are essentially two reasons that contribute to making the topic of the prerogatives of the offended person in criminal proceedings relevant and topical. The first, mainly of a theoretical nature, concerns the need to reflect on what space it can occupy on the scene of criminal proceedings and, in particular, of the accusatory process, built and modelled around the figure of the defendant. The second reason is to be found in the numerous interventions that have led to significant changes in the domestic legal system in recent decades. The study and research work will therefore be oriented towards verifying that the balances on which criminal proceedings are based are not compromised. The decision to focus the research attention on the preliminary investigation phase is due to the circumstance that this is the procedural segment in which the most incisive forms of participation are provided for the offended person. In addition to a wide range of informational rights, functional to guaranteeing her concrete and conscious participation, the offended person holds rights and faculties that seem to be distinguishable in two macro-categories: prerogatives that contribute to the formation of material with evidentiary content and instruments suitable for controlling or conditioning the exercise of criminal action. The study of the main institutes and procedural mechanisms of the preliminary investigation phase is aimed at understanding whether the prerogatives granted to the offended person are compatible with the structure of a criminal proceeding that claims to be classified as accusatory or if they just represent an enrichment in terms of the offended person's procedural weight that weakens the rights of the defendant. Ten years after Directive 2012/29/EU (Victims Directive), it seems possible to proceed with an analysis of the level of compliance of the domestic legal system with the European standards and to formulate some reflections de iure condendo, with the aim of understanding whether there are - and if so, which are - further margins for improvement with reference to the participatory rights and guarantees to be recognised to a subject often considered an unwanted guest of the criminal proceedings, but that we must inevitably investigate.
Tavagnacco, Daniele. "ANALYSIS AND CHARACTERIZATION OF SYSTEMATIC EFFECTS RELATED TO THE STUDY OF COSMIC MICROWAVE BACKGROUND ANISOTROPIES WITH THE PLANCK LFI INSTRUMENT." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10944.
Повний текст джерелаIl satellite Planck è il diretto successore europeo del satellite americano WMAP. Planck è lo strumento di terza generazione per lo studio del CMB dallo spazio ed è composto da una matrice di 74 ricevitori suddivisi in due strumenti, Low Frequency Instrument (LFI) e High Frequency Instrument (HFI), che osserva il cielo in nove frequenze nell'intervallo tra i 30 GHz ed 857 GHz. Tutti i ricevitori osservano il cielo contemporaneamente e continuamente con una risoluzione angolare che va dai ~30 arcominuti, alla frequenza più bassa, ai ~5 arcominuti, alla frequenza più alta, ed una sensibilità dell'odine di ~10^(-6). Planck è stato lanciato nel Maggio del 2009 e, prima del suo completo spegnimento nell'Ottobre del 2013, lo strumento LFI ha continuamente e stabilmente osservato il cielo per 1513 giorni operativi (OD), che corrispondono a otto complete mappe del cielo. I dati di Planck rilasciati nel 2013 includono le mappe di temperatura del CMB basate sul periodo nominale della missione, che copre gli OD dal 91 al 563. Questa tesi presenta la caratterizzazione degli effetti sistematici di LFI effettuata per i dati di Planck rilasciati nel 2013, con una particolare attenzione all'effetto spikes a 1 Hz. Dall'analisi effettuata, tutti gli effetti sistematici conoscuti di LFI risultano sotto controllo e il loro contributo nello spettro di potenza delle mappe di temperatura del cielo prodotte è sensibilmente inferiore al segnale delle anisotropie del CMB. Dai null test effettuati risulta inoltre che tutti gli effetti sono propriamente corretti. nell'analisi dei dati e che non è presente alcun indizio di ulteriori sistematici sconosciuti. L'effetto delle spikes a 1 Hz è causato da una inattesa interferenza tra le linee di acquisizione dei dati scientifici e quelle dell'housekeeping, che avviene nell'elettronica di lettura di LFI. Questo effetto, individuato per la prima volta durante i test a terra dello strumento, si manifesta come un'onda quadra alla frequenza di 1 Hz che si sovrappone alle tensioni in uscita da tutti i ricevitori di LFI. I ricevitori che più risentono di questo effetto sono quelli a 44 GHz. La tecnica di rimozione di questo disturbo nell'analisi dei dati effettuata per i dati di Planck rilasciati nel 2013 consiste nel sottrarre un template di onda quadra dalle tensioni prodotte dai ricevitori. Tra le diverse tecniche utilizzate per la costruzione del template descritte nella tesi, quella del template filtrato utilizzata nei dati del 2013 risulta essere la più efficiente. Nei canali a 44 GHz dove la rimozione è implementata, il contributo delle spikes nello spettro di potenza delle mappe di LFI è ridotto di due ordini di grandezza, sia in temperatura che in polarizzazione. L'utilizzo di un unico template da sottrarre per l'intera missione per ogni segnale misurato, cielo e riferimento per ogni ricevitore, è giustificato dall'estrema stabilità del template sia in fase che in ampiezza nell'arco di tutta la missione. Dopo la correzione dei dati, la stima del residuo del segnale di spikes nelle mappe dovuto a piccole fluttuazioni dell'ampiezza del template nel corso della missione permette di concludere che l'effetto delle spikes a 1 Hz di LFI è totalmente sotto controllo. Siccome il contributo del segnale di spikes nei canali a 30 GHz e 70 GHz è molto piccolo e siccome il template a queste frequenze sembra non essere molto stabile in ampiezza, la possibilità di rimuovere le spikes anche da questi canali è ancora in fase di studio. In particolare, è importante controllare la possibile introduzione di artefatti nei dati come risultato del processo di rimozione. Avendo a disposizione i dati di tutta la missione, nella tesi si è inoltre studiata la possibilità di aumentare la risoluzione dei template, con lo scopo di investigare la possibilità di ottenere dei template più stabili da utilizzare per i canali a 30 GHz e 70 GHz. I template ad alta risoluzione danno dei risultati identici ai template filtrati nei canali a 44 GHz, mentre nei canali a 30 Ghz e 70 GHz, nonostante la stabilità sia migliore, i template sono ancora dominati dal rumore. Nonostante questo, la produzione dei template ad alta risoluzione ha permesso di verificare la stabilità dello strumento fino a risoluzioni di 1/2^(16) s. Inoltre è stato possibile tracciare in dettaglio il comportamento dello strumento LFI sull'intera missione, osservando variazioni del template delle spikes ben al disotto della risoluzione utilizzata per la rimozione delle spikes dai dati di Planck rilasciati nel 2013. Questi nuovi template hanno idividuato 5 OD in tutta la missione dove lo strumento presenta un comportamento peculiare. In tutti questi casi si è scoperto che le variazioni osservate sono legate ad operazioni note effettuate sullo strumento. Da un confronto diretto dei template per i canali a 44 GHz, non si osservano cambiamenti incrementandone la risoluzione. L'effetto finale sulle mappe e sulla stima dei parametri cosmologici è ancora in fase di studio. Al momento non si rende necessario modificare i template utilizzati nella release di Planck del 2013 per la quella del 2014. L'analisi sull'effetto della rimozione dei template ad alta risoluzione dai canali dei 30 GHz e 70 GHz ed il loro possibile utilizzo in release future è ancora in corso.
The Planck satellite is the European direct successor of the American WMAP satellite. Planck is the 3rd generation instrument for the CMB study from space. It consists in an array of 74 detectors divided into two instruments, Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) scanning the sky with nine frequencies in the range 30 GHz to 857 GHz. All the detectors observe simultaneously and continuously the sky with an angular resolution varying between ~30 arcmin at the lowest frequencies, and ~5 arcmin, at the highest, and a resolution of the order of ~10^(-6). Planck was lauched in may 2009 and, before the compete switch off in October 2013, the LFI instrument has stably and continuously observed the sky for 1513 operational days (OD), corresponding to eight complete sky surveys. The 2013 Planck data release includes the CMB temperature maps based on the nominal period of the mission, covering the OD from 91 to 563. This thesis describes the characterization of the systematic effects of LFI realized for the 2013 Planck data release, with a particular focus on the 1 Hz spikes effect. From the analysis performed, all the known LFI systematic effects result to be under control and their contribution in the temperature power spectrum is well below the CMB anisotropies signal. From the null tests it is possible to conclude that all the systematic effects are properly corrected in the data analysis and there are no evidence of new unknown systematic effects The 1 Hz spikes effect is due to an unexpected cross-talk between the scientific acquisition and the housekeeping data lines in the LFI read out electronics. It appears as a square wave with 1 Hz frequency signal, added to the output voltages of all the LFI detectors. The channels where this effect is more prominent are the 44 GHz. The spikes removal technique used in the 2013 Planck data release consist in subtracting from data an estimated spikes template. Among the different methods used in the estimation of the spikes template, the filtered template used in the 2013 Planck data release is the more effective. In the 44 GHz channels, where the spikes are corrected in the data, the final contribution on LFI maps power spectra is reduced by two orders of magnitude both in temperature and polarization. Using a unique template for every signal (sky and reference) for each detector to be subtracted from data among the whole mission is justified by the extreme stability of the template, both in amplitude and phase through all the mission. After correcting for the spikes systematic effect, the estimate of the residual spikes signal in maps due to small amplitude fluctuation of the template during the mission allows to conclude that the spikes effect in the LFI maps is completely understood. Since the spikes signal in the 30 GHz and 70 GHz channels is very small, and since the template seems not to be very stable in these frequencies, the possibility of removing spikes even in these channels is still under evaluation. In particular, it is very important to assess the possible introduction of artifacts for these unstable templates as a result of the spikes removal process. By using ll the mission data, in the thesis, it has been studied the possibility to increase the resolution of the templates used in the spikes removal process by producing high resolution templates aimed to better investigate the instabilities in the 30 GHz and 70 GHz templates. In the 44 GHz, the high resolution template give results identical to the filtered template while in the other frequencies, even if the resulting template is more stable, the templates are still dominated by noise. In addition, the high resolution template production allowed to verify the instrument stability up to the resolution of 1/2^(16) s. Moreover it was possible to track the LFI behaviour over all the mission, checking for variations in the spikes template well below the resolution of the 2013 Planck data release templates. This new templates identified 5 OD over the whole mission where the instrument has a variation from its stable behaviour. It has been discovered that all these variations are directly related to major operations performed on the instrument. From a direct comparison between the templates, for the 44 GHz channels, there is no change in the increase of the resolution. The final contribution on LFI maps and the final contribution in the estimate of the cosmological parameters is still under investigation. At the moment it seems not necessary to modify the templates used in the 2013 Planck data release for the 2014 data release. The possibility to introduce the the high resolution spikes template removal in the future Planck data releases is still under investigation.
XXVI Ciclo
1983
Martins, Ana Cristina Marques. "Revisao sistematica da antibioticoprofilaxia em cesarianas." Rio de Janeiro : [s.n.], 2003. http://teses.cict.fiocruz.br/pdf/martinsacmm.pdf.
Повний текст джерелаBONO, SONIA. "La collocazione sistematica del patto di prova." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1440.
Повний текст джерелаThe pact test is a clause may be included in the contract of employment in order to postpone the time when the employment relationship will become permanent. The test, lasting for up to six months, allows the employer to the employee working in his company, assessing the professional knowledge and personal ability and to decide to hire him permanently if his performance is good for the business. The employee may instead consider the difficulty of tasks to be performed, the adequacy of his remuneration and working environment compatible with his professional and personal characteristics. During this time both parties experiment each other and if the parties are critical by the test they can freely withdraw from the contract of employment without compensation or notice. However, the employee will be entitled to obtain payment of compensation for the time that has actually worked. If the test succeeds the employment contract automatically becomes conclusive and the time of the experiment will be counted as length of service of employment of the employee.
Joya, Daniel Andres Chirivi. "Sistematic review of subfamily Phryninae (Arachnida: Amblypygi)." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-20092018-100051/.
Повний текст джерелаA subfamília Phryninae (Arachnida: Amblypygi) não possui uma revisão recente. Isso traz muitas dificuldades na identificação das espécies. Nenhuma hipótese filogenética para a subfamília foi proposta. A nomenclatura dos caracteres diagnósticos não é uniforme e a maioria das ilustrações não é suficientemente detalhada. Aqui, nós revisamos a subfamília Phryninae, redescrevemos as espécies conhecidas e seis espécies novas, e propomos uma nomenclatura uniforme para os dentes das quelíceras e espinhos dos pedipalpos. Nós realizamos uma análise filogenética usando evidência total e otimização direta no programa POY. Construímos uma matriz morfológica de 92 terminais e 174 caracteres, e uma matriz molecular usando 1557 pb (marcadores COI, l2S e 16S). Os dois conjuntos de informação foram analisados separadamente para perceber a influência de cada um deles na análise de evidência total. Os resultados das três análises foram diferentes. A análise morfológica não recuperou a subfamília Phryninae como monofilética, resultando em 90 topologias igualmente parcimoniosas, Porém, a árvore de consenso estrito teve uma boa resolução. A análise molecular recuperou Phryninae como monofilética, embora não tenha recuperado a família Phrynidae. A análise de evidência total permitiu obter uma única hipótese mais parcimoniosa a qual inclui todas as espécies de Phrynidae, e permitiu resolver as politomias obtidas na análise morfológica. Nesta hipótese, tanto Phrynidae como suas subfamílias se mantiveram monofiléticas. Em todos os resultados, os gêneros de Phryninae são polifiléticos. A árvore da análise de evidência total foi selecionada para elaborar uma nova proposta taxonômica. Mantivemos os gêneros Acanthophrynus, Phrynus e Paraphrynus e criamos cinco gêneros novos: Caicedophrynus gen. nov., Cronopiophrynus gen. nov., Gabophrynus gen. nov., Gentilophrynus gen. nov., e Girondophrynus gen. novo Propusemos 44 mudanças nomenclaturais, Nossos resultados sugerem que a diversidade do grupo é maior do que a conhecida. Isso nos faz considerar importante análises populacionais e filogeográficas em Phryninae
Sette, Lara Durães. "Isolamento e sistematica de actinomicetos degradadores de herbicidas." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256659.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: Diversas linhagens de actinomicetos foram isoladas seletivamente a partir de amostras de solos previamente tratados com os herbicidas alachlor, gramocil e scepter 70DG. Ensaios de seleção e triagem de linhagens resistentes a concentrações elevadas dos herbicidas foram realizados com as culturas puras utilizando meio sólido suplementado com concentrações crescentes dos herbicidas especificados. Dentre as diversas linhagens testadas, 9 isolados demonstraram ser tolerantes à altas concentrações de gramocil, 11 à de scepter e 16 à alachlor. As 16 linhagens isoladas de amostras de solo enriquecido com alachlor foram avaliada quanto à capacidade de degradação in vitro deste herbicida em ensaios utilizando meio mineral líquido contendo como única fonte de carbono o alachlor e seus produtos de hidrólise nas concentrações de 150 e 300 JlL/L. Seis linhagens LS143, LS151, LS153, LS166, LS177 e LS182 foram capazes de transformar entre 50 e 80% do herbicida nas concentrações testadas, formando principalmente compostos indólicos e quinolínicos desclorinados, sem a geração de 2,6-dietilanilina (DEA), um intermediário carcinogênico relatado como um dos principais produtos de degradação/transformação do alachlor. Os melhores resultados foram obtidos com os isolados LS166, LS177 e LS182. A caracterização taxonômica dos isolados degradadores de alachlor, realizada empregando-se metodologias de caracterização fenotípica, genotípica e análise filogenética, resultou na alocação destes no gênero Streptomyces. A linhagem LS151 foi putativamente identificada como S. galbus e os isolados LS 143 e LS 153como S. bikiniensis. As linhagens LS166, LS177 e LS182 mostraram-se similares entre si fenotipica e genotipicamente, e filogeneticamente distantes das espécies descritas na literatura, podendo potencialmente representar espécies novas de estreptomicetos.
Abstract: Several actinomycete strains were selectively isolated from soi! samples previously treated with the herbicides alachlor, scepter 70DG and gramocil. Screening of highly resistant strains were performed by growing the pure cultures on solid media supplemented with increasing concentrations of the selected herbicides. From all strains tested, 9, 11 and 16 isolates were resistant to high concentrations of gramocil, scepter and alachlor, respectively. The 16 strains isolated from soil samples enriched with alachlor were evaluated regarding their ability to degrade this herbicide in vitro. Assays were performed by using a liquid mineral medium supplemented with 150 or 300 flL/L of alachlor and its natural hydrolysis products as the sole carbon sources. Strains LS143, LS151, LS153, LS166, LS177 and LS182 were capable of transforming between 50 and 80% of the herbicide on the concentrations tested, yielding mainly indolic and dechlorinated quinolinic compounds, without the generation of 2,6-diethyllaniline (DEA), a carcinogenic intermediate cited as one of the main degradation/transformation products. The best results were obtained with strains LS166, LS177 and LS182. The taxonomic characterization of the alachlor-degrading strains was performed by using a combination of phenotypic, genotypic, and phylogenetic methods. All strains were assigned to genus Streptomyces. Strain LS151 was putatively identified as S. galbus and strains LS143 and LS153 as S. bikiniensis. Strains LS166, LS177 and LS182 were highly related and could not be identified to any of the species listed in the 16S RNAr sequence databases consulted. These isolates could represent novel streptomycete species
Doutorado
Doutor em Ciência de Alimentos
Martins, Sonia Sevilha. "Uma sistematica de custos para a industria calçadista." reponame:Repositório Institucional da UFSC, 1989. http://repositorio.ufsc.br/handle/123456789/101430.
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O presente trabalho analisa a estrutura produtiva da indústria calçadista, suas características gerais em mercadológicas, assim como os sistemas de custos atualmente utilizados por ela. Observa-se que essas metodologias apresentam deficiências em relação à precisão dos custos incorridos e a rapidez com que estes custos são detectados. O método das Unidades de Esforço de Produção - UEP's, objeto deste trabalho, consiste em uma ferramenta administrativa da mais alta relevância, fornecendo um sistema de informações gerenciais rápidas e precisas, de vital importância para a administração das empresas. Este trabalho propõe uma sistemática de determinação de custos para a indústria calçadista utilizando o método das Unidades de Esforço e Produção e como aplicação prática escolheu-se uma indústria de calçados do pólo calçadista do Rio Grande do Sul, do Vale do Rio dos Sinos.
Salvioni, Sergio. "Profilo di una sistematica sulle limitazioni temporali dei diritti /." Bellinzona : Salvioni, 2005. http://aleph.unisg.ch/hsgscan/hm00124042.pdf.
Повний текст джерелаDantas, Josivania Marisa. "Uma interpretação microscopica para a analise sistematica de cations." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249094.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
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Resumo: A análise sistemática de cátions é uma prática comum nos laboratórios de Química Analítica tanto na análise qualitativa realizada no meio acadêmico quanto na indústria, na identificação dos mais diferentes tipos de amostras desconhecidas. Esta prática é fruto de um vasto conhecimento de química acumulado de décadas por inúmeros pesquisadores e cientistas que conheciam a reatividade de muitas classes de compostos orgânicos e inorgânicos, bem como a propriedade de muitos deles. Em termos de ilustrar os métodos básicos de separação e identificação de íons, esta análise atinge seu objetivo. Contudo, não se conhece até o presente, nenhum texto que discute os conceitos químicos envolvidos em cada uma das etapas de separação e identificação de cátions. Neste trabalho foi elaborado um material didático para ser utilizado por alunos das várias modalidades dos cursos de Química. Nele foram enfatizados os fundamentos, conceitos e teorias envolvidos em cada um dos métodos explorados na análise sistemática de cátions. A produção deste material complementar aos já existentes não implica, de forma alguma, substituir o material utilizado atualmente. Para isto é utilizada a mesma divisão em grupos de cátions, apresentada em livros de Química Analítica Qualitativa. O material didático elaborado foi aplicado nas aulas desta disciplina no Instituto de Química da Unicamp e os resultados foram coletados por meio de questionários, participação e observação nas aulas
Abstract: The systematic cations analysis is a common practice in analytical chemistry laboratory for undergraduate students and also at the industry, for identification of different kinds of unknown samples. This practice is a result of a vast knowledge in chemistry acumulated during decades by researchers and cientists who knew the reactivity of several classes of organic and inorganic compounds, as well as its properties. In order to show the basic methods of ions identification and separation, this systematic analysis attain the desired objective. However, it is not known so far any text that discuss the chemistry concepts that relates the stages of cations separation and identification. In this work a didactic material was elaborated for undergraduate students, emphasiting the fundaments, concepts and theories involved in each one of the methods of systematic cations analysis. This supplementary didactic material was created in order to improve the currently used material. The same division of cations groups presented in the qualitative analytical chemistry books was mantained. The elaborated didactic material was applied in classes of this subject at Chemistry Institute of Unicamp and the results were collected by means of questionnaires and also classes participation and observation
Mestrado
Quimica Analitica
Doutor em Quimica
Lambertini, Elisa. "Programma fisioterapico nel post-intervento cardiochirurgico pediatrico: revisione sistematica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24588/.
Повний текст джерелаDellabiancia, Fabio. "Valutazione strumentale della propulsione su carrozzina: una revisione sistematica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5239/.
Повний текст джерелаBuccarella, Andrea. "Una applicazione sistematica del metodo CANSLIM di William O'Neil." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6733/.
Повний текст джерелаPassadore, Francesco <1992>. "Forme di Business Model: una rassegna sistematica della letteratura." Master's Degree Thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/12271.
Повний текст джерелаPauw, Christiaan Johannes. "Die sistematies-teologiese betekenis van menslike behoeftes." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-09292006-141208/.
Повний текст джерелаTitle page in English. Used title page and an extra page with Afrikaans title for cataloging. Thesis in Afrikaans. Includes bibliographical references (p. 359-368).
Lena, Lucrezia <1996>. "Sintesi di alchil levulinati da alcol furfurilico: uno studio sistematico." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/19209.
Повний текст джерелаRossi, Giovanni <1973>. "Development of a previsional model for the ichthyc biodiversity in the Northern Apennine (Italy)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/322/1/Giovanni_Rossi_PhD_Thesis.pdf.
Повний текст джерелаRossi, Giovanni <1973>. "Development of a previsional model for the ichthyc biodiversity in the Northern Apennine (Italy)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/322/.
Повний текст джерелаVivarelli, Daniele <1978>. "Consequences of plant population size for pollinator visitation and plant reproductive success." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/324/1/complete_for_web_def.pdf.
Повний текст джерелаVivarelli, Daniele <1978>. "Consequences of plant population size for pollinator visitation and plant reproductive success." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/324/.
Повний текст джерелаCotti, Claudia <1977>. "Molecular markers for the assessment of genetic variability in threatened plant species." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/660/1/Tesi_Cotti_Claudia.pdf.
Повний текст джерелаCotti, Claudia <1977>. "Molecular markers for the assessment of genetic variability in threatened plant species." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/660/.
Повний текст джерелаCrema, Silvia <1976>. "Molecular diversity of Primula apennina and phylogeny of Primula Subsection Euauricula." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1833/1/crema_silvia_tesi.pdf.
Повний текст джерелаCrema, Silvia <1976>. "Molecular diversity of Primula apennina and phylogeny of Primula Subsection Euauricula." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1833/.
Повний текст джерелаFisogni, Alessandro <1983>. "Pollination ecology and reproductive success in isolated populations of flowering plants: Primula apennina Widmer, Dictamnus albus L. and Convolvulus lineatus L." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3604/1/Fisogni_Alessandro_tesi.pdf.
Повний текст джерелаFisogni, Alessandro <1983>. "Pollination ecology and reproductive success in isolated populations of flowering plants: Primula apennina Widmer, Dictamnus albus L. and Convolvulus lineatus L." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3604/.
Повний текст джерелаRossi, Martina <1984>. "Taxonomy, phylogeny and reproductive ecology of Gentiana lutea L." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4740/1/Martina_Rossi_Thesis.pdf.
Повний текст джерелаRossi, Martina <1984>. "Taxonomy, phylogeny and reproductive ecology of Gentiana lutea L." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4740/.
Повний текст джерелаLavezzini, Maria Virginia <1989>. "Green Infrastructure in ambito urbano." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/20268.
Повний текст джерелаDella, Bella Andrea <1994>. "Assessment of coastal dune restoration viability in the Veneto Region (Northeastern Italy)." Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/21354.
Повний текст джерелаDella, Pasqua Alberto. "L'esercizio terapeutico nel trattamento della tendinopatia Achillea: revisione sistematica della letteratura." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19320/.
Повний текст джерелаGomes, Evandro Machado. "Parametros basicos para a irrigação sistematica do girassol (Helianthus annuus L.)." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258197.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: O ensaio foi conduzido nos anos de 2001 a 2003, em duas áreas experimentais: Campo de Pesquisa Hidroagrícola do Pinhal - Unicamp e no Horto Municipal Florestal, ambos no município de Limeira - SP, Brasil, com o objetivo de estudar o efeito da irrigação, sobre alguns parâmetros do girassol (Helianthus annuus L.), cultivar M-742. As semeaduras e colheitas foram realizadas, respectivamente, nos dias 18 de junho e 14 de setembro de 2001, 16 de junho e 8 de outubro de 2002 e 24 de junho e 15 de outubro de 2003. O delineamento experimental foi o de blocos casualizados com três tratamentos e quatro repetições. Os três tratamentos consistiram de: 1)irrigação de acordo com o balanço de umidade no solo (Sempre Irrigado); 2) irrigado nos períodos críticos do desenvolvimento, ou seja, formação de botão floral e enchimento de grãos (Irrigado nas Fases) e 3) sem suplementação hídrica (Sem Irrigação). A irrigação foi realizada por sistema de aspersão convencional, conduzida pelo método gravimétrico. Os principais parâmetros analisados foram: altura de planta, diâmetro do capítulo, peso do capítulo, peso da haste, peso das folhas, peso de mil sementes, teor de óleo e proteína de grãos, produção, distribuição do sistema radicular e demanda hídrica da cultura. Os dados foram submetidos à análise de variância e suas médias comparadas pelo teste de Tukey. Pelos resultados obtidos e para as condições do experimento, as seguintes conclusões se evidenciaram como as mais importantes: a) a planta desenvolvida sob marcante estresse hídrico tende a produzir raÍzes em maior número e se aprofundar mais no solo que aquela sem restrição hídrica; b) há maior concentração de raÍzes no horizonte superficial do solo, até 20 centímetros, independentemente da disponibilidade de água. c) a irrigação nas fases de formação do botão floral e de enchimento de grãos é suficiente para garantir níveis de desenvolvimento da planta e do sistema radicular bem como produção de grãos semelhantes à da planta desenvolvida sem restrição Hídrica; d) ocorre acentuada diminuição na massa seca de haste, capítulo e folha como conseqüência do estresse Hídrico; e) plantas desenvolvidas sob marcante estresse Hídrico produziram cerca de 30% menos em peso de grãos que as Sempre Irrigadas e 20% menos que as Irrigadas nas Fases; t) a redução da área foliar, através da redução na altura da planta, mostrou-se como um dos mecanismos de resposta do girassol à escassez de água; g) a planta sob restrição Hídrica tende a produzir um maior teor de proteína em detrimento da produção de lipídeos; h) o kc encontrado mostrou os menores valores aproximadamente aos 20 dias após a emergência, atingindo os valores mais elevados na fase de formação do botão floral (45-50 dias após a emergência)
Abstract: The study was conducted from 2001 to 2003, in Limeira (Brazil), with the sunflower hybrid M-742. The aim of the present work was to study the effect of the supplementary irrigation on some sunflower (Helianthus annuus L.) parameters. The sowing and harvest were done, respectively in June 18, September 14 in 2001; June 16, October 8 in 2002 and June 24, October 15 in 2003. The experimental design was a randomized blocks with three treatments and four replications. The treatments were: a) irrigation according to soil moisture (Always Irrigated); b) irrigation in the critical periods (Phases Irrigated) and c) without supplementary irrigation (Rainfed). The irrigation was performed by sprinkler and scheduled by gravimetric method. The main analyzed parameters were: head, leaves and stem dry weight and height; 1.000 seed mass; head diameter; oil and protein content; root system distribution; water demand. The data were submitted to analysis of variance and the averages were compared by Tukey test. Based upon the results some conc1usions are feasible: a) sunflower plants under sever water stress produces a higher root number that explore the soil deeply than plants with no water stress; b) the greater root concentration occurred in the superficial horizon, for all treatments. c) water supplementation during flower bud formation and grain filling stages is sufficient to assure good levels of grain yield and root system development; d) the water Stress causes an emphasize decrease in stem, head and leave dry mass; e) plants grown under accentuate water stress yielded 30% less than plants with no stress and 20% less than plants that received water only in the critical periods of bud formation and grain filling; f) the leaf area decrease through the plants height appears to be a mechanism of sunflower's defense to water stress; g) the sunflower under water stress increases protein and reduces oil seed content; h) the kc coefficient was lower at 20 days after emergence and higher at flower bud stage
Doutorado
Recursos Hidricos
Doutor em Engenharia Civil
Sirri, Vittoria. "Biomeccanica della corsa tramite sensori inerziali: una revisione sistematica della letteratura." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаDe, Giuseppe Nicola. "Disturbi muscoloscheletrici correlati al lavoro nei Fisioterapisti: Revisione Sistematica della letteratura." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24573/.
Повний текст джерелаFabbri, Marco. "Revisione sistematica della letteratura sull'efficacia del deadlift nel trattamento della lombalgia." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24581/.
Повний текст джерелаSaraiva, Mateus Sasso. "Manobra de hiperinsuflação com ventilador mecânico : uma revisão sistematica com metanálise." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/159642.
Повний текст джерелаBackground: Mechanical ventilation (MV) is one of the supports used during intensive care unit admission. However, the change in the physiological mechanism of mucociliary clearance is one of the deleterious effects caused by MV and endotracheal prosthesis. Thus, respiratory physiotherapy aims to maintain the patent airways and expanded alveolar units, facilitating pulmonary ventilation and for this can be used maneuvers such as manual hyperinflation (HM) or hyperinflation with mechanical ventilator (HVM). Objective: To systematically review the effects of HVM compared with HM on the volume of depurated secretion, MV-associated pneumonia and MV time in adult patients in invasive MV; and secondarily to determine HVM effects on respiratory and hemodynamic variables. Methods: A systematic search was performed in the Cochrane CENTRAL, MEDLINE, Lilacs, PEDro and Embase databases, as well as a manual search in references of studies published up to August 2016. Randomized clinical trials (RCTs) were included, with adult patients in MV, that were submitted to the HVM maneuver comparing with HM maneuver. Two independent reviewers selected the studies, extracted data and assessed the methodological quality. Results: Of the total of 3,949 articles, three RCTs were included, totaling 96 individuals. It was observed that both interventions improved the respiratory variables: volume of secretion (0.08g, 95% CI: -0.70 to 0.85), static compliance (1.01ml / cmH2O, 95% CI: -5.80 to 7 , 83%), dynamic compliance (1.47 cmH2O, 95% CI: -3.43 to 6.36), PaO2 / FiO2 ratio (11.18; 95% CI: -26.28 to 48.65), and blood pressure Of carbon dioxide (-0.38 mmHg, 95% CI: -2.78 to 2.03), with no difference between HVM and HM. None of the included studies evaluated the variables pneumonia associated with MV and time of MV. Conclusions: This systematic review with meta-analysis has shown that both interventions improve the secretion volume, static compliance, dynamic compliance, PaO2 / FiO2 ratio and blood pressure of carbon dioxide and that there is no difference between them, however, due to limitations of the included studies, further studies are needed to confirm the findings.
FERRARI, PIETRO. "Sistematica simplant nella progettazione dei casi implanto-protesi: limiti e vantaggi." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2009. http://hdl.handle.net/10281/53788.
Повний текст джерелаLancioni, Andrea. "Vegetazione, qualità ambientale e funzionalità degli agroecosistemi (bacino dell'Aspio-Marche)." Doctoral thesis, Università Politecnica delle Marche, 2011. http://hdl.handle.net/11566/241856.
Повний текст джерелаMETHODS The integrated analysis of agroecosystems is based on the application of cartographic and floristic-vegetational indexes at multiple scale of investigation: basin (ASPIO; level 1), sub-basin (Aspio Springs and Boranico Ditch; level 2), sample areas inside the sub-basins (Lame Carradori Ditch and Fontanaccia Ditch; level 3), farms (AM, AS and AL; level 4a), farmhouse courtyards (C1, C2 and C3; level 4b). OBJECTIVES The main purpose of the study was the acquisition of qualitative and quantitative data concerning the conservation status of biodiversity in an area with mainly agricultural use. The identification of a conservation threshold for the agroecosystems was also made. RESULTS The land use and hydrographic network analysis highlighted problems related to the urbanization and the application of intensive agricultural techniques. The farming practices often caused the alteration or deletion of several ditches of order 1. In the study area we observed 513 plant species (75 families). By vegetational analysis we detected 41 vegetation associations and 2 subassociations already described, in addition to 7 new associations and 6 new subassociations. We studied mainly erbaceous vegetation, in order to improve knowledge about habitats subject to higher levels of human disturbance. The study area is representative of the typical hilly countryside along the central Adriatic coast. The vegetation landscape is composed by 5 different geomorphologic units and 12 vegetation series. 8 series were particularly described at the sub-basin level. The application of the floristic-vegetation indexes confirmed, through precise measurements, a better state of conservation of biodiversity in areas characterized by less intensive agricultural use and higher concentration of semi-natural elements. The comparison between farms showed an higher level of maturity of the vegetation according to the organic farming and forage farming. PROPOSALS We identified some utilization problems. In order to ensure agrobiodiversity conservation we made management proposals aimed to protect many different types of habitat: road verges, rivers and ditches edges, grassland areas, ecotones and small woods. The proposals are related to the application of the current European directives and regulations (Rural Development Programme, Cross Compliance, Habitat Directive, HNV Farmland Areas).
FAVA, FABRIZIA. "I micromammiferi (Soricomorpha, Rodentia) come strumento per l’analisi della frammentazione degli habitat rurali nelle Marche (Italia centrale)." Doctoral thesis, Università Politecnica delle Marche, 2014. http://hdl.handle.net/11566/242828.
Повний текст джерелаHabitat loss, habitat fragmentation and habitat degradation represent three processes that caused the change of landscape and the loss of biological diversity. Urbanization, roads, intensive agriculture and railways, may limit many species movement because they create a “barrier effect” which can affect the behavior and dispersal patterns of some. Small mammals are good indicators of connected habitat and fragmentation. In this study, we tried to measure the level of environmental quality in some rural areas of the Marche region (Italy) with different level of naturalness through the analysis of the small mammals composition. These areas are mainly characterized of agro-ecosystems with different level of artificiality. Moreover, habitat fragmentation is caused by the absence of habitat and ecological corridors, consisting of natural and semi-natural vegetation, would allow the gene exchange between populations living in the environmental mosaic of patches considered; we tested the level of habitat fragmentation with the genetic variability of “umbrella” population of two similar species of rodents: wood mouse (Apodemus sylvaticus) and the yellow-necked mouse (Apodemus flavicollis). These objectives were pursued using different types of sampling: i) the collection of barn owl’s pellets (Tyto alba) to define the composition of the small mammals community in an area and to get samples of wood mouse (bone remains consist of skull, jaw and teeth); ii) the use of traps to obtain samples of the yellow-necked mouse (fresh tissue). The use of barn owl’s pellets has many advantages, is a simple sampling and it is possible to notice an high number of small mammals species. From this comparison, threshold values were obtained to evaluate the environmental quality and the tolerance point of the fragmentation of rural areas with the highest level of artificiality.
Umbriaco, Rita. "Revisione sistematica del genere Parastagmatoptera Saussure, 1871 (Mantodea, Mantidae, Stagmatopterinae) con considerazioni sulla filogenesi e sulla biogeografia del taxon." Thesis, Universita' degli Studi di Catania, 2011. http://hdl.handle.net/10761/106.
Повний текст джерелаParastagmatoptera Saussure, 1871 (Mantodea, Mantidae, Stagmatopterinae) is a genus which includes 13 species living in Central and Southern America. It has a very complicated taxonomy due to the marked sexual dimorphism and disputed species' history. The aims of this study were the following: (1) to order the genus systematically and taxonomically through a morphologic analysis by examining, in particular, the male genitalia. The latter has been examined for the first time in the history of the genus; (2) to conduct a statistic investigation with a discriminant analysis; (3) to point out the phylogenetic relationships between the species by using cladistics; (4) to assess the zoogeographic distribution of the species. The morphologic analysis of some peculiar features revealed that there is synonymity among certain species: P. tessellata (male nec female), P. hoorie e P.abnormis with P.flavoguttata; P.confusa with P.pellucida; P. tessella (female), P.serricornis and P.vitrepennis are synonymous with P. unipunctata; P. concolor is synonymous with P. theresopolitana. Moreover, P. vitreola, till now considered synonymous with P. flavoguttata, is a valid species. Furthermore, P.amazonica and P.glauca aren't to be included within the genus. Finally, I found three new species inedited. Statistics confirmed the morphologic analysis results. Cladistics highlighted the genus monophyletic origin, the phylogenetic relation between species and the existence of two groups. Through a zoogeographic analysis three distribution models was identified: 1) peri-amazonic species, 2) amazonic species sensu strictu, 3) species of the atlantic forest.
CARTABIA, MARCO. "Selection and characterization of wood decay fungal strains for the development of mycelium-based materials." Doctoral thesis, Università degli studi di Pavia, 2022. http://hdl.handle.net/11571/1453465.
Повний текст джерелаFungi, and in particular wood decaying fungi, are being re-considered in the last few years as source for biotechnological and industrial applications. These organisms seem to be particularly suitable for developing myco-materials thanks to their chemical composition, mycelial texture, ease of cultivation, and lack of sporification. In this study 94 different strains of Agaricomycetes, belonging to 75 different species, related to 50 genera (18 families and 5 orders) were isolated using malt extract agar (MEA) medium enriched with hydrogen peroxide. Molecular analysis, extracting and amplifying the ITS region, allowed to confirm the identification of the isolated strains. Among these, twenty-one wood decaying fungal strains were chosen on the base of colour, homogeneity, and consistency of the mycelium. The growth rate of each selected strain was measured and a chemical characterization of all their mycelia obtained in liquid static fermentation was determined through thermogravimetric analysis (TGA). Two different typologies of materials have been produced. One was obtained developing an exclusive method (newly patented) to improve consistency, structure and thickness of the mycelium mats: among all the strains, Abortiporus biennis 064-18, Fomitopsis iberica 104-19 and Irpex lacteus 076-18 showed to be suitable for a demo production of this material typology. The obtained mats were then analysed throw scanning electron microscopy (SEM) image processing and mechanical tests (tensile strength, elongation at break and Young modulus). On the other hand, the second kind of material was obtained using fungal strains characterised by their hyphal cell wall chemical composition: highest content of α-glucans, β-glucans or chitin as well as a high growth rate. Five strains out of the twenty-one selected were chosen to evaluate how these differences could influence the mechanical and chemical characteristics of the resulting material. These five fungal strains were cultivated in liquid submerged dynamic fermentation (both flasks and bioreactor). Then, chitin and glucans were extracted and crosslinked with acetic acid and plasticized with glycerol in order to obtain flexible sheets. In the end, Abortiporus biennis 064-18, Fomitopsis iberica 104-19 and Stereum hirsutum 073-18 were able to produce this kind of material. Thermogravimetric analysis (TGA) allowed to evaluate the principal chemical components of the materials, providing a semi-quantitative indication on mat composition. The material obtained from each species was also mechanically tested (tear strength, elongation at break, and Young’s modulus) showing quite different results. In conclusion, two typologies of sustainable and 100% biobased pure fungal-based row materials have been produced from different wood decaying fungal strains. Further chemical and physical steps are needed in order to let these materials show their high potential in practical applications. This project represents a valuable and in-depth analysis of alternative suitable wood decaying fungal strains knowledge and an essential groundwork for any further study on this topic. Future researches have a real opportunity to significantly improve these promising myco-materials.
ANTONECCHIA, Gaby. "Analisi della variabilità genetica del sottogenere Quercus Oerst. in Italia centro-meridionale." Doctoral thesis, Università degli studi del Molise, 2015. http://hdl.handle.net/11695/66309.
Повний текст джерелаThe presence of reproductive barriers to interspecific gene flow results in hybrid production that can increase diversity, especially in sympatric areas where several species coexist. Infact, hybridization is a common phenomenon that frequently occurs in areas where multiple interfertile taxa coexist and represents an important biological factor in the evolution of plant species (Rieseberg 1997). White oaks are usually sympatric in different areas of their distribution, a configuration that tends to favour hybridization and interspecific gene flow (Rushton 1993; Williams, Boecklen and Howard 2001; Tovar-Sánchez and Oyama 2004; Lepais et al. 2009). The identification of hybrids in Quercus genus can be difficult because of the high morphological variability of hybrids, even when the characters of the parental species are well described. This leads to a high morphological variability and, as a result, brings confusion in the taxonomy of this group; in the Italian peninsula, this is especially true for Q. pubescens (Di Pietro et al. 2012). In this study I assessed molecular variability in three sympatric white oak species (Quercus frainetto Ten., Q. petraea Liebl. Matt. and Q. pubescens Willd.) within a natural community in central Italy (intra-specific analysis) and I analyzed genetic diversity of Q. pubescens in a large area of South Italian peninsula (intra-specific analysis). I used 11 microsatellite markers derived from Expressed Sequence Tag (EST-SSRs) in a multiplex PCR and implemented a Bayesian clustering analysis to assign individuals to species or hybrids. All genotyped loci were polymorphic for all species and three genetic clusters corresponding to each species were detected. Genetic diversity of Q. pubescens varied markedly within the studied areas, but cluster analysis assigned individuals to a homogeneous cluster, despite coming from sites widely separated. In the sympatric area, a higher level of gene flow and occurrence of hybrids were detected between Q. petraea and Q. pubescens, while Q. frainetto showed a lower genetic diversity and a stronger reproductive isolation from the other two species. Different in rates of interspecific gene flow for this species may related to prezygotic barriers such as differences in flowering times and pollen viability (Salvini et al. 2009). Indeed, ecological factor such as phenological characteristics or pollen viability may explained the high proportion of Q. pubescens alleles detected within hybrids in sympatric area, even those stands where pure Q. pubescens were absent. The high allelic richness found in Q. pubescens could be explained by the greater propensity of this species to hybridize with other white oak species (Curtu et al. 2011), in particular if one consider the extensive gene flow recorded with Q. petraea in several areas of their distribution (Curtu et al. 2007b; Lepais et al. 2009; Salvini et al. 2009; Lepais and Gerber 2010). This work contributes essentially in the study of gene flow between oak species and clarifies the genetic relationships among sympatric white oaks, including the scarcely studied Q. frainetto. Evidence of gene flow between Q. frainetto, Q. petraea and Q. pubescens was provided and discussed in relation to species abundance, local microclimatic conditions and the presence of partial reproductive isolation between species, offering a better understanding of the biology and evolution of these taxa in the Italian peninsula.
LALLAI, ANDREA. "Biological study of grape populations in Sardinia by a comparative seed morphocolorimetric and ecophysiological approch." Doctoral thesis, Università degli Studi di Cagliari, 2022. http://hdl.handle.net/11584/327210.
Повний текст джерелаDAGNINO, DAVIDE. "Climate changes and the future of the endemic flora of South-Western Alps: risk assessment and conservation strategies." Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/929121.
Повний текст джерелаMannocchi, David. "Alterazioni biomeccaniche nella Sindrome della bandelletta Ileotibiale : una revisione sistematica della letteratura." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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