Thèses sur le sujet « Analisi funzionali »
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Dal, Corso Elia <1989>. « Giapponese e Ainu : due lingue a contatto - Analisi di alcuni aspetti sintattico-funzionali ». Master's Degree Thesis, Università Ca' Foscari Venezia, 2013. http://hdl.handle.net/10579/3867.
Texte intégralIbatici, Martina <1990>. « L'identificazione del DSL in età scolare : analisi delle categorie funzionali in narrazioni semispontanee ». Master's Degree Thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/9557.
Texte intégralMazzini, Simone. « Studio del profilo microbico e di geni funzionali in carcasse di broiler mediante analisi metagenomica shotgun ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14621/.
Texte intégralTerrito, Angelo. « Trapianto renale robotico : analisi degli aspetti chirurgici e dei risultati funzionali dalla sua introduzione alla sua standardizzazione ». Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2020. http://hdl.handle.net/11380/1201018.
Texte intégralKidney transplantation (KT) is considered the preferred treatment for patients with end-stage renal disease (ESRD) owing to the greater survival rate and better quality of life in comparison to hemodialysis. To date, the open approach has been the gold standard in KT, despite its invasiveness and high morbidity. In order to reduce the morbidity associated with the conventional open surgery, the minimally invasive procedure may be a good alternative, particularly in immunocompromised and fragile KT patients and even more important in obese recipients due to the higher complication rate. The scientific evidence supporting RAKT is growing rapidly. Since the first description in 2010, robot-assisted kidney transplantation (RAKT) has nowadays been shown to be technically feasible in different clinical settings, including living donors, obese patients, deceased donors, as well as in challenging surgical conditions (i.e. patients with previous abdominal surgery, grafts with multiple vessels and patients with autosomic dominant polycystic kidney disease). In 2016, the European Association of Urology (EAU) formed the EAU Robotic Urology Section (ERUS) RAKT working group in order to prospectively follow the outcomes of RAKT. Thanks to the collaboration of this group, Breda et al. published the largest multicenter series of RAKT; Territo et al. addressed the functional results at 1-year follow-up from living donors; Vignolini et al. developed a RAKT program with grafts from deceased donors; Siena et al. described the technique for RAKT in grafts with multiple vessels; Decaestecker et al. adopted the RAKT technique for kidney auto-transplantation, reporting the largest series for robot-assisted kidney auto-transplantation as a minimal invasive approach in case of complex ureteral stricture. In light of comparable graft and patient survival, the advantages of robotic kidney transplantation, in terms of incision length, post-operative pain, blood loss and time to recovery, are supported by robust evidence. In addition, RAKT is associated with a lower risk of specific surgical complications such as postoperative lymphocele and wound infection. Despite that, there is no study comparing the functional results and the quantification of the systemic response in open versus robotic KT. In order to explore this issue, clinical results (immediate vs. Delayed Graft Function) and systemic inflammatory markers (C-Reaction Protein, Interleukin 6, and Neutrophil Gelatinase-Associated Lipoprotein) were compared in robotic vs. conventional open KT. Furthermore, the previous experiences in RAKT has been shown to have no impact on the learning curve of this emerging technique, when the procedure is carried out by surgeons with experience in robotic surgery and vascular anastomosis. However, consensus has been lacking on the optimal way of determining the learning curve in RAKT. Although RAKT technique has already been standardized by the ERUS group, analysis of the learning curve remains difficult due to its multifactorial nature and the several variables that have to be considered. Therefore, the learning curve in RAKT was studied, evaluating surgical and functional results and intra- and postoperative complications in the five highest volume centers of the ERUS group.
Bolzan, Anna <1979>. « Analisi dei parametri vegetazionali e dei caratteri funzionali di specie guida come strumenti di studio di comunità prative ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1969/1/bolzan_anna_tesi.pdf.
Texte intégralBolzan, Anna <1979>. « Analisi dei parametri vegetazionali e dei caratteri funzionali di specie guida come strumenti di studio di comunità prative ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1969/.
Texte intégralMantuano, Alessandra. « Analisi delle relazioni tra caratteristiche operativo-funzionali delle infrastrutture ciclabili e la scelta del percorso da parte degli utenti ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6753/.
Texte intégralMilandri, Agnese <1985>. « Alterazioni strutturali e funzionali nelle diverse eziologie di amiloidosi cardiaca : analisi dei parametri ecocardiografici ed emodinamici invasivi e loro ruolo prognostico ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9690/1/Tesi%20%20-%20Agnese%20Milandri.pdf.
Texte intégralBackground and aim Traditionally, amyloidotic cardiomyopathy (CA) has been considered a restrictive cardiomyopathy, but recent studies have highlighted the greater complexity of its pathophysiology, in which even the systolic dysfunction plays an important role. In this recent context, the invasive hemodynamic profile has rarely been investigated. Therefore, we sought to characterize the hemodynamic, structural and functional profiles of CA in the three main etiologies (light chain amyloidosis (AL), mutant transthyretin-related amyloidosis (ATTRm) and 'wild-type' ATTR (ATTRwt)), to evaluate their differences between various disease stages and to explore the prognostic role of the main clinical and instrumental variables in CA. Methods and results We retrospectively analyzed data of 224 patients with CA (AL, n=93; ATTRm, n=66; ATTRwt, n=65). Compared with ATTRwt, AL patients have a milder cardiac morphological involvement, but comparable hemodynamic data, characterized by increased biventricular filling pressures and reduced systolic stroke volume. ATTRm shows a better hemodynamic profile than ATTRwt, despite similar echocardiographic data. LV diastolic and longitudinal systolic function indices (S wave at Tissue Doppler Imaging and longitudinal strain) are abnormal from the initial stage of the disease, while LV ejection fraction remains preserved in most patients, even in the advanced stages (FE 50 [37-60] %; FE < 40% in 28% of NYHA III/IV patients). At multivariable analysis, age, NYHA III/IV, AL etiology, myocardial contraction fraction (MCF), cardiac index (CI) and right atrial pressure (RAP) at catheterization are independently associated with adverse clinical events. Conclusions This study confirms the complex pathophysiology of CA, in which the diastolic dysfunction is accompanied by abnormal longitudinal systolic function from the initial disease stages. AL and ATTRwt, despite different degrees of morphological alterations, have a similar hemodynamic profile; ATTRm, instead, has more favorable hemodynamic parameters. Among the instrumental parameters, MCF, CI and RAP emerged as significant predictors of adverse events.
Di, Bella Monica. « Studi tassonomici, filogenetici e funzionali di microrganismi fotosintetici adattati ad estremi di temperatura ». Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425488.
Texte intégralDallacasa, Francesca <1985>. « Miglioramento del comportamento termico in strutture per la trasformazione enologica : analisi comparativa di diverse soluzioni progettuali per specifiche aree funzionali non climatizzate ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7597/1/dallacasa_francesca_tesi.pdf.
Texte intégralThe aim of this research is to define a set of design criteria for the improvement of the energy performances of wineries in medium-small wine growing and producing farms. Specifically, the goal of the research consists in pointing out design-supporting criteria, suitable to assess the effect of different design strategies on the thermal behaviour of buildings for winemaking and for wine storage, in unconditioned rooms. The assessment method is applied on a case-study farm winery, selected as a representative example within the national framework. The design solutions are related to the building envelope and take into consideration different possibilities in terms of thermal insulation, opacity and transparency, in addition to the aspects related to the orientation of the building and to the presence or absence of green shadings. The energy simulation of the different scenarios applied to the case-study was conducted in dynamic conditions with the software Energy Plus, according to a calibrated and validated procedure. The evaluation is made by means of indicators based on the concept of “thermal comfort” for the wine, which allows to compare different scenarios, taking as a reference the internal temperatures of the rooms. The results underline and quantify the improvement of thermal behaviour in unconditioned rooms generated by the application of various combinations of solutions and identify the most effective and efficient ones. The method defined in this research represent an useful assessment tool that allows to support operators and designers to identify the best design solutions – in new constructions or retrofit projects – in order to optimize the thermal performance, to minimize and eliminate, if possible, the energy needs for air conditioning.
Dallacasa, Francesca <1985>. « Miglioramento del comportamento termico in strutture per la trasformazione enologica : analisi comparativa di diverse soluzioni progettuali per specifiche aree funzionali non climatizzate ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7597/.
Texte intégralThe aim of this research is to define a set of design criteria for the improvement of the energy performances of wineries in medium-small wine growing and producing farms. Specifically, the goal of the research consists in pointing out design-supporting criteria, suitable to assess the effect of different design strategies on the thermal behaviour of buildings for winemaking and for wine storage, in unconditioned rooms. The assessment method is applied on a case-study farm winery, selected as a representative example within the national framework. The design solutions are related to the building envelope and take into consideration different possibilities in terms of thermal insulation, opacity and transparency, in addition to the aspects related to the orientation of the building and to the presence or absence of green shadings. The energy simulation of the different scenarios applied to the case-study was conducted in dynamic conditions with the software Energy Plus, according to a calibrated and validated procedure. The evaluation is made by means of indicators based on the concept of “thermal comfort” for the wine, which allows to compare different scenarios, taking as a reference the internal temperatures of the rooms. The results underline and quantify the improvement of thermal behaviour in unconditioned rooms generated by the application of various combinations of solutions and identify the most effective and efficient ones. The method defined in this research represent an useful assessment tool that allows to support operators and designers to identify the best design solutions – in new constructions or retrofit projects – in order to optimize the thermal performance, to minimize and eliminate, if possible, the energy needs for air conditioning.
Bandera, Beatrice. « Implementazione di processi funzionali ad uno studio LCA applicato ad un servizio di pulizia in ottica di etichettatura ecologica ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/22061/.
Texte intégralSalvatori, Pierluigi. « Studio ed analisi sperimentale di processi plasma assistiti di deposizione di film sottili a base silicio su materiali polimerici : effetto della potenza sulle caratteristiche funzionali del coating ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Trouver le texte intégralPizzo, Leonardo <1977>. « Analisi dei processi di invasione di piante esotiche nei paesaggi costieri sabbiosi del Veneto ». Doctoral thesis, Università Ca' Foscari Venezia, 2012. http://hdl.handle.net/10579/1204.
Texte intégralThis study analyses the effects of disturbance (mainly human, but also natural) on the process of invasion by alien species in the coastal dune systems of Veneto region. The research has been articulated into two levels, one focusing on morphological and functional traits of coastal dune wild species (natives and aliens) and the other on the plant community level. The results highlight that height, large leaf area and SLA are useful traits for the successful colonisation of the most invasive species along the mobile coastal dunes. Human impact has deeply contributed to the decay of the quality and functionality of coastal ecosystems, reducing the resistance native plant communities are able to oppose the arrival of invasive alien species under less disturbed conditions.
DI, CANITO ALESSANDRA. « Genomic and functional analysis of Rhodococcus strains to identify genes and degradative functions for soil quality evaluation ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241307.
Texte intégralSoil quality has been one of the major issues of the last decades, because of the increase of anthropogenic pollution. Soil contains organisms involved in vital functions (nutrient/hydrological cycles and degradation of toxic compounds). Under stress conditions, soil microorganisms undergo several alterations so molecular technologies use microbial communities as an ecological parameter in monitoring polluted sites. Bacteria belonging to Rhodococcus genus have an important role in recalcitrant compound degradations. It is a metabolically versatile genus, widely distributed in nature. Rhodococcus spp. can degrade a wide range of organic compounds (aliphatic/aromatic hydrocarbons, heterocyclic, nitriles, sulfuric, herbicides) and to survive in presence of toxic compounds, carbon starvation, UV irradiation and osmotic stress. In line with their catabolic diversity, they possess large and complex genomes, containing a multiplicity of catabolic genes, high genetic redundancy and a sophisticated regulatory network. The aim of this project is to obtain molecular tools to use as "marker" sequences for soil assessment, through analysis of metabolic pathways and catabolic gene clusters involved in the degradation of the most diffused environmental contaminants. In particular, this work focused the attention on three Rhodococcus strain genomes: R. opacus R7, R. aetherivorans BCP1 and R. erythropolis MI2. A Phenotype Microarray approach was used to evaluate R7 and BCP1 strains metabolic potential and their stress response. Also, the capability to utilize various contaminants (aliphatic hydrocarbons and cycloalkanes, aromatic compounds, polycyclic aromatic compounds, naphthenic acids and other carboxylic acids) and to persist under stress conditions (high osmolarity, pH stress, toxic compounds, antibiotics) was tested. A genome-based approach was used to relate their abilities to genetic determinants involved in the analysed metabolisms (naphthalene, o-xylene, n-alkanes, naphthenic acids, phenols, phthalate) and in their environmental persistence. In particular, o-xylene and naphthenic acids degradations were investigated in R. opacus R7. Computational and molecular analyses revealed the putative involvement of several genes in these degradation pathways. R7 can degrade o-xylene by the induction of the akb genes (deoxygenation) producing the corresponding dihydrodiol. Likewise, the redundancy of sequences encoding for monooxygenases/hydroxylases (prmA and pheA1A2A3), supports the involvement of other genes that induce the formation of phenols, converging to the phenol oxidation path. The activation of converging oxygenase systems represents a strategy in Rhodococcus genus to degrade recalcitrant compounds and to persist in contaminated environments. NAs degradation pathway is not fully clear but two main routes have been proposed: i) aromatization of the cyclohexane ring ii) activation as CoA thioester. RT and RT-qPCR results showed that R. opacus R7 degrade cyclohexanecarboxylic acid (CHCA) molecule (used as a model) by a cyclohexane carboxylate CoA ligase (aliA). An application of this work was demonstrated by a microcosm approach, simulating a bioaugmentation process with R7 strain. Autochthone bacteria and R7 capabilities to degrade CHCA were evaluated and compared; results indicated that R7 can degrade the contaminant faster than the microbial community and that its contribute increased CHCA degradation rate. The degradation rate was followed by RT and RT-qPCR, monitoring the expression of the aliA gene. Moreover, a biotechnological application was investigated in R. erythropolis MI2, studying the disulfide 4,4-dithiodibutyric acid (DTDB) degradation pathway. DTDB is a promising substrate for polythioester (PTE) synthesis; indeed, its degradation produces the PTE building block 4-mercaptobutyric acid. The aim was pursued generating R. erythropolis MI2 marker-free deletion mutants for genes involved in the final steps of the pathway.
Baldini, Laura. « Analisi delle funzionalità respiratorie ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5001/.
Texte intégralGLORIA, FABIO. « Biomeccanica delle restaurazioni protesiche : analisi funzionale FEM ». Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/208738.
Texte intégralFEM analysis through 2 studies: the aim of the first study i sto evacuate the bone mechanical response under varying load conditions as a function of different geometries of abutment finish line and used material for the costruction of prosthesic crown; the aim of the second study is to evaluate the influente o finish line on stress didtribution and resistance to the loads of a ZrO2 and porcelain implant-supported crown. Parole
Bruno, Veronica. « Analisi funzionale e prebiotica di residui dell'industria alimentare ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12124/.
Texte intégralOUZOUNOV, DIMITAR HRISTOV. « Paesaggio funzionale della Sila Grande. Analisi fitosociologica e geosinfitosociologica ». Doctoral thesis, Università Politecnica delle Marche, 2014. http://hdl.handle.net/11566/242714.
Texte intégralAim of thesis is to face practical problems related to the land management and biodiversity conservation, using methods of landscape analysis through approaches of synphytosociology. Studied area is Sila Grande (Calabria, S Italy), for which an exhaustive bibliographic analysis was carried out and cartographic materials collected. Spatial data and different themes were organized in a GIS, proceeding with a first segmentation (environmental patches identification) based on geomorphologic, geological land use, bioclimatic, etc. In addition an analysis of mountainous plant communities has been carried out, based on 1047 phytosociological relevés (554 original) in order to investigate paleo-geographic, ecological and anthropic factors that influence flora and vegetation diversity. Data from literature and field studies (1998-2013) have been critically analyzed in order to clarify syntaxonomic position of the main vegetation types. Twenty-six new syntaxa (associations and subassociations) are proposed and an updated sintaxonomic scheme is presented. Querco-Fagetea and Molinio-Arrhenetheretea are the most represented classes in the area due to the bioclimatic factors. Wet communities (Isoeto-Nanojuncetea, Nardetea strictae, Scheuchzerio- Caricetea fuscae, Montio-Cardaminetea and Littorelletea uniflorae) have a significant biogeographical importance thanks to a rich group of boreal species. This “Nordic imprint” of the flora, vegetation and landscape is of special interest and its peculiarities are analyzed from ecological and biogeographycal point of view. Mediterranean and sub-Mediterranean elements prevail in dry grasslands and shrublands. Some problems about dynamics of vegetation are discussed such as the role of black pine communities and their relations with beech forests, trying also to give clues for conservation strategies and management.
Vedovato, Marco. « Analisi funzionale e comparata delle Longine VAMP7 e Ykt6 ». Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425047.
Texte intégralOcchipinti, Cristina. « Analisi di segnali audio mediante funzioni wavelet ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1581/.
Texte intégralFilippone, Claudia <1978>. « Analisi funzionale di cloni genomici e subgenomici di parvovirus B19 ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/79/1/Tesi_Claudia_Filippone.pdf.
Texte intégralFilippone, Claudia <1978>. « Analisi funzionale di cloni genomici e subgenomici di parvovirus B19 ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/79/.
Texte intégralDESOGUS, ALESSIA. « Identificazione e analisi funzionale di fattori regolatori dei geni globinici ». Doctoral thesis, Università degli Studi di Cagliari, 2014. http://hdl.handle.net/11584/266529.
Texte intégralDRAGOMIR, Mihaela. « L'architettura templare neoassira e neobabilonese : analisi contestuale e interpretazione funzionale ». Doctoral thesis, Università degli studi di Ferrara, 2014. http://hdl.handle.net/11392/2389058.
Texte intégralToma, M. « ANALISI IMMUNOISTOCHIMICA E FUNZIONALE DEL SISTEMA ENDOCANNABINOIDE NELLA MALATTIA PARODONTALE ». Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/331135.
Texte intégralCarnazza, Massimo. « Analisi funzionale delle postazioni di governo di una imbarcazione da diporto ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3456/.
Texte intégralRondini, Diego <1981>. « Lo squat test per la valutazione funzionale dello sportivo : analisi quantitativa ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1937/1/Rondini_Diego_Lo_squat_test_per_la_valutazione_funzionale_dello_sportivo_analisi_quantitativa.pdf.
Texte intégralRondini, Diego <1981>. « Lo squat test per la valutazione funzionale dello sportivo : analisi quantitativa ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1937/.
Texte intégralGovoni, Irene. « Analisi e progettazione delle funzionalità di un software per la gestione delle competenze : sviluppo del modello di processo e del prototipo funzionale. Struttura di analisi e definizione dei dati per la gestione delle Risorse umane ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1007/.
Texte intégralMERCURI, FEDERICA. « Organizational networks nel settore sanitario : analisi delle condizioni di funzionalità ». Doctoral thesis, Università Politecnica delle Marche, 2009. http://hdl.handle.net/11566/242352.
Texte intégralRuzzone, Giovannella. « Analisi e progettazione funzionale del nuovo terminal container del porto di Ravenna ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5431/.
Texte intégralPapa, Antonella <1978>. « Analisi funzionale dei recettori per le neurotrofine p75NTR e Trka in neuroblastoma ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/679/1/Tesi_Papa_Antonella.pdf.
Texte intégralPapa, Antonella <1978>. « Analisi funzionale dei recettori per le neurotrofine p75NTR e Trka in neuroblastoma ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/679/.
Texte intégralGhisi, Enrico. « Analisi funzionale per l’implementazione in un sistema ERP nel settore moda e abbigliamento ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Trouver le texte intégralMiotto, Ilaria <1995>. « Analisi funzionale del popolamento ittico ripario degli ambienti lagunari del Delta del Po ». Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/20895.
Texte intégralViscomi, Federico. « Analisi delle funzionalità respiratorie : monitoraggio della respirazione attraverso uno stetoscopio elettronico ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5032/.
Texte intégralD’Annibale, Michelangelo. « Analisi dello sviluppo asintotico di funzioni applicate al sistema velivolo ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4761/.
Texte intégralPaone, Giuseppe <1974>. « Funzioni della contrattazione collettiva : analisi e prospettive comparate e comunitarie ». Doctoral thesis, Università Ca' Foscari Venezia, 2010. http://hdl.handle.net/10579/929.
Texte intégralThe research focus on the functions pursued by collective bargaining using comparative method and trying to put in to the evidence the functional equivalences among analyzed systems. First part focus on the research of a definition of collective bargaining and the use of the term “function” in Italian industrial relations law. In the second part the interest is turned to the regulation strategies and industrial relations structure of French and English law and to the function of collective bargaining in European community law
PALMERIO, FRANCESCA. « Analisi molecolare e funzionale della variabilità del gene della succinico semialdeide deidrogenasi (SSADH) umana ». Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/520.
Texte intégralSSADH is a mitochondrial NAD+-dependent enzyme and serves its major role in the catabolism of the GABA, the most important inhibitory neurotransmitter of the Central Nervous System (CNS), by oxidation of the substrate succinic semialdehyde (SSA) to succinate which enters the Krebs cycle; SSA can be also converted into 4-hydroxybutyric acid (GHB) by tissue specific SSA reductases. Complete SSADH deficiency results in 4-hydroxybutyric aciduria, a rare recessive autosomal disorder of human metabolism. 4-HBA patients manifest a considerable variability of the clinical phenotype, ranging from mild psychomotor retardation to severe neurological defects, due to the neurotoxic effects of the abnormal accumulation of GABA and GHB in tissues and physiologic fluids. Recent studies reveal a second role of SSADH: it is one of the two mitochondrial aldehyde dehydrogenases responsible of detoxification of 4-hydroxy-2-nonenal (HNE). HNE is a reactive aldehyde physiologically produced in relatively large amounts from lipid peroxidation. Elevated levels of HNE in CNS are implicated in the pathogenesis of numerous neurodegenerative disorders such as Parkinson’s and Alzheimer’s diseases. By studying more than 50 SSADH deficient families, we identified several pathological variants. We also identified not pathological variants in the coding region. Some of the polymorphic variants are rare and some reach polymorphic frequencies: the G to C transversion in position c.106 and C to T transitions in positions c.538 and c.545. Resequencing non human primates DNA, we identified the ancestral and derived alleles for each polymorphic site and we identified those that occurred in the human specific lineage. We observed that both ancestral and derived alleles for the positions c.106 and c.545 are present in almost all human populations and that the ancestral allele is more frequent; whereas the derived allele at the position c.538 has increased its frequency and now represent the majority in human populations. Resequencing families and single subjects, we obtained 3 different haplotypes for the most common polymorphisms (c.106 G>C, c.538 C>T and c.545 C>T): haplotype 1 (GCC), haplotype 4 (GTC) and haplotype 5 (CTT). We performed transient transfections with cDNAs corresponding to these three haplotypes into HEK293 cell line. The enzyme activity associated with the three haplotypes showed the same efficiency when the substrate was SSA or HNE. When expressing SSADH activity of haplotypes 4 and 5 as percentage of haplotype 1 (100%), they produced 62-72% and 23% of the activity, respectively, using SSA and HNE as substrates. In order to characterized the SSADH promoter region we analysed about 100 subjects of different geographic origins; we identified nine variant positions and obtained the reconstruction of haplotypes and their frequencies. The haplotypes were subcloned in an expression vector with luciferase as reporter gene and named BK31, BK45 and BK70; we obtained the following results: clone BK31 showed the highest activity (100%) while the others, BK45 and 70, showed about 50% of the activity with respect to BK31. Another aim of this study was to confirm the second role of SSADH verifying whether it confers protection against HNE and other oxidants. We obtained stable transfected cell lines overexpressing haplotype 1 of SSADH coding region with different gene-dosage. For each stable cell line we measured RNA expression and enzyme activity, on both SSA and HNE as substrates. We observed that the difference in RNA expression levels parallels the difference in enzyme activities. Using MTT assay as a measure of cell viability, we observed that the stable transfected cell lines, showing the highest enzyme activity, showed also a significant increase of cell viability after treatment with different concentrations of HNE and H2O2, confirming a very high efficacy of SSADH overexpressing cells in detoxification. We concluded that both coding and promoter regions show a very high variability in the human population and some haplotype variant reduce the enzyme activity up to 50% of the most common ones. We confirmed the second role of ALDH5A in the protection against HNE and other oxidants.
COVONE, FRANCESCA. « Analisi strutturale e funzionale dei sistemi vegetazionali presenti nel Parco Regionale dei Castelli Romani ». Doctoral thesis, La Sapienza, 2006. http://hdl.handle.net/11573/917397.
Texte intégralDomi, Teuta. « Analisi funzionale di isoforme native e mutanti della pompa Ca2+-ATPasi della membrana plasmatica ». Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3426015.
Texte intégralLe pompe PMCA (Plasma Membrane Ca2+-ATPases) rappresentano un sistema di importanza primaria per l’estrusione del Ca2+ dal citoplasma delle cellule eucarioti. Le pompe PMCA fanno parte di una famiglia multigenica: 4 geni codificano 4 diverse isoforme (PMCA1-4) e la diversità delle isoforme è aumentata da meccanismi di splicing alternativo dei trascritti primari che generano più di 30 isoforme diverse. L’espressione delle diverse isoforme, oltre ad essere tessuto specifica, è regolata durante lo sviluppo ed il differenziamento cellulare. Le isoforme PMCA1 e 4 hanno una distribuzione ubiquitaria, mentre le isoforme PMCA2 e 3 sono prevalentemente neuronali . Il significato funzionale di un numero così elevato di isoforme è tuttora oggetto di studio nel campo delle pompe PMCA. Opinione generale è che ognuna delle isoforme svolga un ruolo specifico a seconda delle esigenze specifiche della cellula. Si ipotizza inoltre che la localizzazione e l’attività tessuto-specifica delle diverse isoforme possa essere influenzata da interazioni isoforma-specifiche con partner proteici diversi. I risultati ottenuti nel nostro Laboratorio hanno dimostrato che una delle isoforme ubiquitarie, la pompa PMCA4, a differenza dell’isoforma tessuto-specifica PMCA2, interagisce con un partner particolarmente interessante, la proteina 14-3-3, e che questa interazione ha un effetto inibitorio sull’attività della pompa. Nella prima parte del mio Dottorato di ricerca, l’indagine della ricerca di interattori molecolari è stata estesa alle rimanenti isoforme, quella tessuto-specifica PMCA3 e quella ubiquitaria PMCA1. La ricerca è stata condotta mediante un saggio di interazione di doppio ibrido in lievito usando come “esca” la porzione N-terminale delle pompe PMCA3 e PMCA1. E’ stato riscontrato che l’altra isoforma tessuto-specifica, la pompa PMCA3, a differenza della pompa PMCA2 interagisce con la proteina 14-3-3. La pompa PMCA1 invece non interagisce. La nostra ricerca si è quindi focalizzata nell’individuare il motivo per cui la PMCA2 è l’unica isoforma tra le PMCA a non interagire con la proteina 14-3-3. Un’analisi bioinformatica della regione N-terminale delle 4 isoforme delle PMCA usata come esca nel saggio del doppio ibrido in lievito ha rivelato che in tutte e 4 le isoforme si trova una sequenza consenso per il legame delle proteine 14-3-3, ma anche che la pompa PMCA2 possiede dei residui amminoacidi nelle regioni fiancheggianti il sito di consenso che disturbano la corretta struttura secondaria necessaria alla interazione. L’ipotesi proposta dall’analisi bionformatica è stata confermata sperimentalmente. Sono state infatti costruite 2 esche per il saggio di interazione del doppio ibrido dividendo in 2 la sonda originale di 90aa nella parte N-terminale della PMCA4 che interagiva con 14-3-3. Una delle due sonde conteneva il sito consenso di interazione, ma non i siti di fiancheggianti responsabili della formazione della struttura secondaria ad ?-elica,, l’altra non conteneva il sito di interazione. Queste sonde sono state testate per loro capacità di interagire con la proteina 14-3-3 nel sistema del doppio ibrido in lievito e nessuna delle due ha dato risultati positivi. Una terza sonda, più corta della esca originale di 90 aa ma che conteneva sia il sito di consenso che le regioni fiancheggianti ha dato invece risultati positivi, confermando così che sia il sito di consenso che le regioni fiancheggianti sono necessarie all’interazione e che la non interazione non dipende dalla lunghezza ridotta delle sonde. Gli studi successivi nel corso del mio dottorato di ricerca si sono quindi concentrati a caratterizzare funzionalmente la pompa PMCA2. Questa isoforma è particolarmente interessante in quanto possiede alcune proprietà che la distinguono dalle altre isoforme. E’ inoltre l’unica isoforma per la quale sono state descritte mutazioni puntiformi del gene responsabili di un fenotipo patologico: topi che presentano mutazioni spontanee del gene della PMCA2 presentano un fenotipo associato a sordità e a difetti di equilibrio e coordinazione. Nella seconda parte della tesi sono presentati i dati ottenuti della caratterizzazione funzionale delle diverse varianti di splicing della pompa PMCA2. Le pompe sono state sovraespresse in un sistema cellulare omogeneo ed è stata misurata la loro capacità di contrastare l’aumento transiente della concentrazione di Ca2+ citosolico indotto da uno stimolo fisiologico. Successivamente è anche stata caratterizzata l’attività di alcune forme mutanti della PMCA2 individuate nel topo e nell’uomo. I plasmidi di espressione per le varianti di splicing della PMCA2 w/a, w/b, z/a e z/b sono stati co-transfettati con un plasmide per l’espressione di una sonda per il Ca2+, la fotoproteina ricombinante Ca2+-sensible equorina (cytAEQ), in una linea stabile di cellule di ovario di criceto (CHO). Le cellule CHO sono state stimolate con ATP, un agonista fisiologico che agisce sui recettori purinergici P2Y accoppiati a proteine G e genera, in seguito alla produzione del secondo messaggero inositolo 1,4,5 trifosfato (che apre i canali per il Ca2+ dei depositi intracellulari) un aumento transiente della concentrazione di Ca2+ citosolico. E’ stato osservato che le isoforme z/b, z/a e w/b sono particolarmente efficaci nel ridurre l’altezza del picco del transiente di Ca2+ (lo riducono infatti del 50%), caratteristica che riflette la capacità della pompa di rispondere con una rapida attivazione all’aumento improvviso della concentrazione di Ca2+. La variante w/a invece sembra avere una minore capacità di controllare il picco di Ca2+, lo riduce infatti solo del 30% rispetto alle cellule di controllo. La PMCA2w/a quindi risponde meno efficientemente ad un aumento improvviso della concentrazione di Ca2+ citoplasmatica. Questa caratteristica potrebbe giustificare l’esclusiva presenza della variante w/a della PMCA2 nelle stereocilia delle cellule sensoriali dell’orecchio interno. Infatti la concentrazione di Ca2+ extracellulare nell’endolinfa, il liquido che bagna le stereocilia, è notevolmente più bassa di quella degli altri ambienti extracellulari essendo dell’ordine di 10-20 ?M anziche mM. La caratterizzazione delle pompe mutate responsabili di fenotipo di sordità nel topo (3 mutanti) e nell’uomo (un mutante) ha dimostrato che le mutazioni non modificano le capacità della pompa di contrastare l’altezza del picco del transiente di Ca2+ generato dalla stimolazione cellulare, ma riducono invece la sua velocità nel ripristinare i livelli basali: colpiscono cioè la fase discendente del transiente di Ca2+. I livelli basali di Ca2+ vengono quindi ripristinati più lentamente e ciò determina che nelle cellule che presentano le PMCA2 mutate la concentrazione di Ca2+ citosolica resta elevata per tempi più lunghi rispetto alla situazione che si verifica nelle cellule di controllo. I dati dimostrano quindi che le mutazioni della PMCA2 non influiscono sulla capacità della pompa a rispondere ad un arrivo repentino di Ca2+, ma invece alterano l’attività basale della pompa. Queste alterazioni dell’omeostasi del Ca2+ a livello delle cellule sensoriali dell’orecchio interno si ripercuotono probabilmente sul fenomeno dell’adattamento rendendo le cellule “meno pronte” a ricevere stimoli sonori successivi portando così ad un fenotipo di sordità.
Gavazzi, F. « Analisi strutturale e funzionale del fattore di trascrizione opaco 2 in endospermi di mais ». Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/61197.
Texte intégralMotta, Michele. « Esistenza e unicità di funzioni "measure-preserving" ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21239/.
Texte intégralBedeschi, Luca. « Analisi sulla crescita e sulle funzioni dei Linked Open Data - LODStories ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7733/.
Texte intégralRIGHINI, LUCIA. « Analisi genomica e funzionale sui componenti del microbiota intestinale Clostridium ramosum, Escherichia coli e Enterobacteriaceae ». Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2020. http://hdl.handle.net/11380/1201048.
Texte intégralGut microbiota is a collection of bacteria, archaea, and eukarya that inhabits the mammalian gastrointestinal tract. The composition of this microbial community is host specific, it evolves throughout lifetime, and can create an intricate and mutually beneficial relationship with the host (Backhed, 2005; Neish, 2009). Through the years, research interest has been manly focused on the characterization of antibiotic resistance acquisition of virulent clinical Escherichia coli and other Enterobacteriaceae species, whereas strains isolated from healthy subjects have been less studied and mostly investigated only in comparative studies (Johnson et al., 2000; Kudinha et al., 2013; Lee et al., 2019). The first project focused on the deep characterization of a collection of E. coli and other Enterobacteriaceae isolated from fecal samples of 20 healthy volunteers, in order to determine whether the relationship between PFGE genotyping, phylogroups, genetic determinants, and functional features can be established among the isolates. A total of 51 different strains of E. coli were collected. According to Clermont phylogrouping, the 27% of E. coli isolates belonged to B2 phylogroup, the 24% to B1, 14% to F, 14% to A, 10% to D, 8% to E and 4% to C. Within the B2 and F strains, 12 shared pattern of virulence genes associated with clinical uropathogenic strains. A total of 49 out of 51 strains were sensitive to all the tested antibiotics. From the same fecal samples it has been possible to collect 34 different Enterobacteriaceae strains belonging to 12 different species: Klebsiella pneumoniae, K. oxytoca, Enterobacter hormaechei, E. ludwigii, E. cloacae, Citrobacter freudnii, C. amalonaticus, Hafnia alvei, Cronobacter sakazakii, Morganella morganii, Serratia liquefaciens, and Raoultella planticola. A total of 6 out of 10 K. pneumoniae strains were positive for mrkD, ycfM, kpn, and entB genes that encode for different fimbrial structures and siderophores. The 88% of Enterobacteriaceae strains isolated were able to produce biofilm in M9Glu minimal medium; the 62% was able to produce cellulose and the 58% to synthetize curli fibers. These features are consistent with the profile of clinical isolates. Strains of E. coli and of other Enterobacteriaceae potentially act like pathogens based on the presence of virulence genes, capacity of biofilm production, and transfer of genetic material through conjugation, albeit they innocuously inhabit the gut of healthy subjects. It is possible that they occasionally act as etiologic agents of extra-intestinal infections. It is relevant that most E. coli strains are susceptible to a wide range of antibiotics. The second project involved the study of Clostridum ramosum, an intestinal bacterium that seems to be involved in obesity development for its role in the modulation of serotonin availability in the intestinal epithelium that is responsible of an increased nutrient absorption (Mandić et al., 2018). The presence of C. ramosum was investigated in mice strains prone to obesity and in mice subjected to a high-fat diet, in order to identify endogenous strains. From a total of 85 mice, it was possible to isolate only 3 strains of endogenous C. ramosum. In spite of the obesity of the mice analysed, the isolation of C. ramosum was not so frequent as hypothesized. Probably the bacterium itself was not involved in the exacerbation of obesity in those mice.
Spadaro, Ester. « Drosophila melanogaster come modello di malattie mitocondriali umane : analisi funzionale dei geni deEthe1 e dSurf1 ». Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425950.
Texte intégralDrudi, Paolo. « Analisi topologico-computazionale della perfusione di tessuti in tomografia computerizzata ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7960/.
Texte intégralCimatti, Anna Giulia <1983>. « Valutazione precoce della funzionalità visiva nei neonati pretermine very low birth weight : analisi dei fattori nutrizionali coinvolti nello sviluppo della funzionalità visiva ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9164/2/Cimatti_AnnaGiulia_tesi.pdf.
Texte intégralDocosahexaenoic acid (DHA) is a constituent of neuronal and retinal membranes and plays a role in brain and visual development within the first months of life, especially in preterm infants. We aimed to evaluate whether maternal supplementation with krill oil during breastfeeding increases long-chain polyunsaturated fatty acids (LCPUFAs) BMcontents, whether BM supplemented increases hematic LCPUFAs contents in neonates and neonatal visual function. Mothers of infants admitted to Neonatal Intensive Care Unit (NICU) were allocated in group 1: received krill oil-based supplement for 30 days; group 2 control. BM samples were collected at baseline(T0)and day 30(T1) and underwent a qualitative analysis of LCPUFAs composition. Afterall preterm neonates at NICU were allocated in group 1:received supplemneted BM and group 2: control. Neonatal visual function, qualitative analysis of BM LCPUFA and neonatal blood were performed. First part:Sixteen breastfeeding women were included: 8 received krill-oil supplementation and 8 were control group. Baseline percentage values of DHA, arachidonic acid (%AA), and EPA (%EPA) did not differ between groups. A significant increase in %DHA, %EPA and a significant reduction in %AA between T0 and T1 occurred in supplemented group. Second part:8 preterm neonates were divided in two groups. No significant differences of LCPUFA was found between two groups. An increase of DHA% and a decrease of AA% and AA:DHA on BM and blood was found in supplemented group. A significant better visual function was found at 3 and 6 month on supplemented group. Oral krill oil supplementation effectively increases DHA and EPA contents in BM. Second part of this study is evalueting potential benefits of this strategy on brain and visual development in preterm neonates.
Gordini, Alice. « Analisi del movimento e valutazione funzionale : confronto dei dati su soggetti con paralisi del muscolo trapezio ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21895/.
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