Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal.

Thèse numérisée par la Division de la gestion de documents et des archives de l'Université de Montréal.

La conception de matériaux composites à particules, fibres ou structures sandwichs, faits de renforts auxétiques en vue de l'amélioration des propriétés amortissantes, est analysée dans cette thèse. Pour une telle analyse, le comportement auxétique décrivant un coefficient de Poisson négatif nécessite d'être compris tant d'un point de vue « effet structure » que « effet matériau ». Ce dernier point c'est-à-dire l'« effet matériau », faisant référence à la forme, aux orientations et différentes propriétés des phases constitutives du matériau, reste peu documenté dans la littérature scientifique. Ainsi partant d'un formalisme micromécanique basé sur l'équation cinématique intégrale de Dederichs et Zeller, nous explorons dans un premier temps et analytiquement le domaine de validité du matériau composite auxétique par le schéma mono-site de Mori-Tanaka. Ensuite des microstructures plus complexes, à l'instar de la microstructure du vide multi-enrobé et celle d'un cluster réentrant d'inclusions ellipsoïdales prenant en compte les interactions de ces dernières, sont étudiées et validées par des simulations Eléments Finis. Les résultats de ces analyses nous indiquent, par ailleurs dans le cas des matériaux isotropes que le comportement auxétique n'est atteint que si et seulement si une des phases du composite est initialement auxétique. Aussi, la nécessité d'introduire des liaisons ou inter-connections au niveau des inclusions ellipsoïdales est montrée comme étant la méthode conduisant à un effet auxétique au niveau de la microstructure du cluster réentrant. Outre cette analyse préliminaire sur le domaine de validité du comportement auxétique dans les composites, l'effet de l'introduction d'inclusions auxétiques dans une matrice viscoélastique en l'occurrence le PolyVinyle de Butyral (PVB) d'une part et l'utilisation de couches viscoélastiques et auxétiques dans les structures sandwichs d'autre part, ont été étudiés. Les réponses de ces matériaux en termes de propriétés amortissantes, telles que le module de stockage et le facteur de perte, sont alors déterminées et discutées par rapport aux composites à renforts non auxétiques (conventionnels) / The design of composite (particles/fibers or structures) materials, consisting of auxetic reinforcements, with enhanced damping properties is studied herein. For such analysis, the auxetic behavior describing a negative Poisson's ratio needs to be understood as "structure effect" point of view than "material effect". Indeed, the "material effect" which treats of the topological and morphological textures of the composite constituents remains poorly documented in the literature. Based on the kinematic integral equation of Dederichs and Zeller, the design space of auxetic composite materials is explored initially through an analytical one-site formulation of the Mori-Tanaka micromechanics scheme. Then, more complex microstructures are investigated from micromechanics formalism as well as Finite Element Method (FEM) simulations. One can cite the multilayered hollow-cored microstructure and the microstructure describing a cluster of re-entrant ellipsoidal inclusions in which the interaction among them (inclusions) is taken into account. The results provided by these investigations show us for instance in the case of isotropic materials that auxeticity is achieved if and only if one of the material?s constituents (inclusion or matrix) is initially auxetic. Also, it is noticed in the case of ellipsoidal inclusions describing the re-entrant cluster that auxetic behavior can be recovered by introducing joints between inclusions. Otherwise, favorable issues are only expected with auxetic components. In addition to this preliminary analysis concerning the validity domain of auxetic behavior in composites, the effect of inserting auxetic reinforcements within a viscoelastic matrix for instance PolyVinylButyral (PVB) on the one hand, and the use of auxetic and viscoelastic layers in sandwich structures on the other hand, are studied. The response of these materials in terms of damping properties, such as the storage modulus and the loss factor are then identified and discussed versus non-auxetic (conventional) composite reinforcements

L’objectif de ce travail de thèse est de développer de nouveaux agents tensioactifs, capables de s’auto-assembler sous forme de micelles permettant de solubiliser les principes actifs insolubles, en vue de leur administration par voie intraveineuse. Cette étude a permis la synthèse, la caractérisation physico-chimique ainsi que l’évaluation toxicologique in vitro et in vivo de nouveaux agents tensioactifs d’origine naturelle. Au cours de cette étude, différentes familles de tensioactifs ont été évaluées. Ces nouveaux agents tensioactifs sont composés d’une partie hydrophobe de type cholestérol, sels biliaires ou lipides, associée via une fonction amide à une partie hydrophile dérivée d’acides aminés tels que la lysine, la glutamine ou l’acide glutamique.Ces travaux expérimentaux ont permis d’étudier l’influence de la flexibilité de la partie hydrophobe sur la capacité de solubilisation des tensioactifs. Cette étude a montré que l’efficacité de solubilisation est reliée à la flexibilité de la partie hydrophobe. L’utilisation d’agents tensioactifs composés d’une chaîne lipidique saturée flexible a permis de solubiliser efficacement le principe actif insoluble avec un taux de charge de 46 % (m/m). Les tensioactifs composés de lipides saturés sont donc plus efficaces en termes de solubilisation que les dérivés de stéroïdes ou de lipides polyinsaturés, moins flexibles. Les études de toxicité ont mis en évidence la relation ente la structure chimique des tensioactifs et leur toxicité, en particulier vis-à-vis des membranes cellulaires. L’introduction de doubles liaisons en configuration cis dans la partie lipidique des tensioactifs permet de diminuer leur interaction avec les membranes cellulaires et donc leur toxicité mais diminue également leur capacité de solubilisation. Le développement de nouveaux agents tensioactifs nécessite donc de trouver un compromis entre la capacité de solubilisation et la toxicité des tensioactifs. / The aim of this thesis was to develop novel surfactants, able to self-assemble into micelles and to solubilize insoluble drugs intented for intravenous injection. Natural-based surfactants were synthesized and their physico-chemical properties were evaluated. In addition, their in vitro and in vivo toxicity were evaluated. Their drug solubilization abitity was also investigated. Three surfactant classes were evaluated. They were composed of a hydrophobic moiety, such as cholesterol, bile salts or lipids, bonded to a hydrophilic moiety, deriving from amino acids, such as lysine, glutamine or glutamic acid, via an amide bond.The influence of surfactant hydrophobic moiety flexibility on drug solubilization ability was evaluated. This study evidenced that solubilization efficiency is related to the surfactant hydrophobic moiety flexibility. The use of surfactants with flexible and saturated lipidic moieties increased drug water solubility with a drug loading of 46 % (w/w). Saturated lipid-based surfactants exhibited a better solubilization efficiency, in comparison with steroid-based surfactants or poly-unsaturated-based surfactants. Toxicity studies evidenced the relation between surfactant chemical structure and their toxicity, in particular with cell membranes. The introduction of double bond in cis configuration in surfactant lipidic moiety decreased their interaction with cell membranes and thus their toxicity. In addition, this chemical modification also decreased their solubilization ability. To develop novel surfactants, it is thus necessary to take into account drug solubilization ability and toxicity of surfactants.

Cette thèse traite de l'acquisition des consonnes par des enfants francophones monolingues. Son but est de montrer que l’utilisation des traits distinctifs et des principes qui leur sont associés (hiérarchie des traits, évitement de la marque, économie des traits) rend compte du parcours d’acquisition des consonnes en français. Le corpus de cette thèse est constitué des productions spontanées longitudinales (pendant 16 et 28 mois) de deux enfants francophones. L’analyse a dégagé deux grandes étapes dans le parcours d’acquisition des contrastes consonantiques. Chacune d’elle repose sur l’intervention d’un principe associé aux traits distinctifs. La première étape rend compte de l’acquisition isolée des contrastes opposant les consonnes, dont l’ordre est guidé par le principe de hiérarchie des traits, exprimé par leur robustesse : plus un trait est robuste, plus il sera acquis rapidement. L’acquisition d’un trait suppose également l’acquisition des deux valeurs de ce trait par l’intervention du principe d’évitement de la marque : la valeur non-marquée de chaque trait sera acquise avant la valeur marquée. La seconde étape consiste en la diffusion, à l’ensemble du système, d’un trait acquis de façon isolée. Cette diffusion est guidée par le principe d’économie des traits : plus un trait participe à l’économie du système, plus il se diffusera rapidement. Afin d’extraire de l’input de l’enfant, l’information utile nous permettant d’exprimer l’actualisation de chaque principe dans la langue, nous avons conçu des calculs de fréquence des traits. Nous avons établi un lien entre l’expression des principes de hiérarchie, d’évitement de la marque et d’économie, et ces différentes fréquences des traits dans le langage adressé à l’enfant. En appréhendant l’acquisition consonantique comme l’acquisition de contrastes au sein d’un système, nous avons modélisé le parcours d’acquisition des consonnes grâce aux traits distinctifs et à leurs principes associés, en le mettant en regard des travaux sur la structuration des inventaires sonores adultes. / This work focuses on consonantal acquisition of monolingual French-speaking children. Its aim is to show that the use of distinctive features and their associated principles (feature hierarchy, markedness avoidance, feature economy) captures the path of consonantal acquisition in French. The data of this dissertation consist of spontaneous longitudinal productions (during 16 and 28 months) of two French-speaking children. Analysis of the data reveals two main stages in the acquisitional path of consonantal contrasts. Each of these stages relies on the intervention of a principle associated with distinctive features. The first stage captures the isolated acquisition of contrasts between consonants. The order of the acquisition of contrasts is guided by the feature hierarchy principle, which is expressed by feature robustness: the more robust a feature is, the faster it will be acquired. The acquisition of a feature also implies the acquisition of its two values through the intervention of the avoidance of markedness principle: the unmarked value of a feature will be acquired before the marked value. The second stage of the feature acquisition path consists in the distribution of a feature - acquired in an isolated way - throughout the whole system. This distribution is guided by the economy feature principle: the more a feature participates in the system economy, the more rapidly it will diffuse. In order to extract the relevant information from the child’s input that allows us to express the realisation of each principle into the language, we designed feature frequency calculations. We established a link between the expression of the hierarchy, markedness avoidance and economy principles and the different feature frequencies in child-directed speech. By approaching consonantal acquisition as contrast acquisition within an entire system, we were able to model the consonantal acquisition path based on distinctive features and their associated principles, paralleling it with work on the structure of adult sound inventories.

O objeto deste trabalho é investigar a realização dos ditongos orais no português vernacular de São Tomé e Príncipe (pvs). Esta variedade de português está em contato com outras línguas faladas no país e difere do sistema linguístico da variedade considerada padrão, o português europeu (pe) (FIGUEIREDO, 2010; GONÇALVES, 2010; CHRISTOFOLETTI, 2011; SANTOS & CHRISTOFOLETTI, 2011). A hipótese para as peculiaridades do comportamento do sistema fonético-fonológico do pvs é o aprendizado do português como L2 (por gerações passadas recentes) (HAGEMEIJER, 2009; GONÇALVES, 2010), e a influência do contato com as línguas crioulas faladas no país, como o santome (FERRAZ, 1979), o principense (MAURER, 2009), o angolar (MAURER, 1995) e o kabuverdianu, visto que as comunidades são, em geral, bilíngues ou convivem em espaços multilíngues. As mudanças linguísticas intergeracionais e o contato também justificariam o comportamento na realização dos ditongos que possuem variações em sua realização no pvs. O corpus deste trabalho é formado por gravações de fala espontânea de 18 informantes, coletados na capital de stp por meio da sociolinguística variacionista (LABOV, 1991 [1972]). A justificativa para o estudo das realizações dos ditongos, constatada a singularidade de suas realizações, é observar o comportamento de uma variante de português em um ambiente multilíngue; aumentar o nosso conhecimento sobre essa variante; confrontar um sistema em diglossia; possibilitar outros estudos sobre o pvs e comparações com outras variantes de português nos Países Africanos de Língua Oficial Portuguesa. Em relação às variáveis sociais, há uma relação da aplicação do processo de monotongação com a quantidade de anos de escolaridade, sendo que as pessoas mais escolarizadas tendem evitar mais a monotongação do que as pessoas menos escolarizadas. Ademais, foi constatada a singularidade do sistema fonético-fonológico dessa variedade africana de português, pois, diferente da norma europeia (MATEUS & DANDRADE, 2000; MATEUS, 2002), considerada de prestígio no país, o pvs realiza a monotongação dos ditongos [eI ], como em dinheiro [di\"ñeKU], primeiro [pri\"meKU] e feijoada [feZu\"ad5], sugerindo uma aproximação ao comportamento do português brasileiro (pb) (cf. BISOL 1991, 1994; ARAÚJO 1999; LOPES 2002 e outros), todavia, a monotongação ocorre ainda em contextos nos quais tanto nas variantes do pb, como nas do pe, ela é bloqueada. Assim, ocorre a monotongação mesmo quando a consoante seguinte é uma oclusiva alveolar surda [t], como em feitiço [fe\"tisU], leitão [le\"tãU ] e direito [di\"KetU], fato não documentado no pb ou no pe. Com relação ao ditongo [oU ] no pvs, a monotongação é categórica, assim como nos estudos apresentados sobre variação nos ditongos de outras variedades de português. No que diz respeito ao ditongo [oI ], observamos que a variação na aplicação da monotongação ocorre apenas quando seguido pela consoante [S], responsável pelo espraiamento do nó vocálico criando o glide [I ] via processo fonético. O ditongo [aI ], por sua vez, sofreu variação no processo de monotongação fundamentalmente diante de consoante palatal, nos demais contextos sua ocorrência foi pouco produtiva. Do mesmo modo, o ditongo [eU ] teve baixo índice de ocorrência de monotongação, sendo mantido em quase todos os contextos. Os demais ditongos, [EI ], [EU ], [uI ] e [iU ], tiveram raras ocorrências, e foi impossível observar variações em suas realizações. / The purpose of this work is to investigate the realization of oral diphthongs in vernacular portuguese of Sao Tome and Principe (pvs). This variety of portuguese is in contact with other languages spoken in the country and differs from the linguistic system of the considered standard variety, the european portuguese (pe) (FIGUEIREDO, 2010; GONÇALVES, 2010; CHRISTOFOLETTI, 2011; SANTOS & CHRISTOFOLETTI, 2011). The hypothesis for the behavior of the phonetic-phonological system of pvs is the learning of portuguese as L2 (from recent past generations) (HAGEMEIJER, 2009; GONÇALVES, 2010), and the influence of contact with the creole languages spoken in the country, as the santome (FERRAZ, 1979), the principense (MAURER, 2009), angolar (MAURER, 1995) and kabuverdianu, since the communities are usually bilingual or living in multilingual environment. The intergenerational linguistic changes and the linguistic contact also justify the behavior in the realization of diphthongs that have variations in their realization in pvs. The corpus of this study consists of recordings of spontaneous speech of 18 informants, collected in the capital of stp through the assumptions of sociolinguistic theory and method (LABOV, 1991 [1972]). The reason to study the achievements of diphthongs, noted the uniqueness of its accomplishments, is to observe the behavior of a variant from portuguese in a multilingual environment; increase our knowledge of this variant; confront a system in diglossia; enable further studies on the pvs and compare it with other variants in the African countries witch have portuguese as official language. Regarding social variables, there is a link to the application of the process of monophthongization with the number of years of schooling, once that people with more time of school education tend to avoid monophthongization than people with less time of school education. Moreover, it was found the uniqueness of the phonetic-phonological system of pvs, because, unlike the pe (MATEUS & DANDRADE, 2000; MATEUS, 2002), considered prestigious in the country, pvs performs the monophthongization of diphthongs [eI ], as seeing in dinheiro [di\"ñeKU], primeiro [pri\"meKU] and feijoada [feZu\"ad5], it suggests an approach to behavior of Brazilian portuguese (pb) (cf. BISOL 1991, 1994; ARAÚJO 1999; LOPES 2002 e outros), however, monophthongization still occurs in contexts in both the variants whrer it is blocked as pb, as in the pe. So monophthongization occurs even when the following consonant is an voiceless alveolar occlusive [t], as in feitiço [fe\"tisU], leitão [le\"tãU ] e direito [di\"KetU], nons-documented fact in pb or pe. Regarding the diphthong [oU ] in pvs the monophthongization is categorical, as shown in studies on diphthongs variation in other varieties of portuguese. With respect to the diphthong [oI ] we observed that the variation in the application of monophthongization occurs only when it followed by the consonant [S], responsible for spreading the vocalic feature creating the glide [I ] through phonetic process. The diphthong [aI ] suffered variation in the monophthongization process, mainly before palatal consonant, in other contexts its occurrence was not very productive. Similarly, the diphthong [eU ] had a low rate of occurrence of monophthongization, and was kept in almost all contexts. The other diphthongs, [EI ], [EU ], [uI ] and [iU ], had rare occurrences, and it was impossible to observe variations in their realizations.

Esta tese trata do princípio de impessoalidade expresso no art. 37, caput, da Constituição da República de 1988. Parte-se da ideia de que toda construção jurídica pressupõe uma concepção de mundo. Mesmo passados 25 anos da outorga da Constituição, a doutrina não revela consenso sobre o significado jurídico deste princípio. A partir desta realidade, busca-se investigar para saber se o princípio existe, qual sua razão de ser, para quê ele serve, como ele se dá e, por fim, o que é, afinal, este princípio. Parte-se da premissa de que o léxico tem contribuído para a falta de consenso. O termo impessoal faz confundir o ser impessoal com o agir de modo impessoal, conforme parece dizer o dispositivo constitucional. Após algumas considerações sobre o contexto constitucional que inverte o ponto de referência para o ser humano -, sobre o Direito Administrativo dados históricos, características etc. -, faz-se uma pesquisa bibliográfica para saber o que pensam os autores que escreveram sobre ele. Em seguida, após o exame dos termos impessoal e impessoalidade e algumas considerações sobre a visão de intérpretes da experiência administrativa do Brasil, chegamos ao que parece significar o princípio de impessoalidade: uma nova concepção de mundo para a função administrativa a processualidade e o controle finalísticos / Cette thèse porte sur le principe dimpersonnalité exprimé à l\'article 37, caput, la Constitution de la République en 1988. Il commence avec l\'idée que toute construction juridique présuppose une conception du monde. Même après 25 ans de l\'octroi de la Constitution, la doctrine ne révèle pas un consensus sur la portée juridique de ce principe. De cette réalité, qui cherchent à mener une enquête afin de déterminer si le principe est là, quelle est votre raison d\'être, pour qui il sert, comme il est et, enfin, ce qui est, après tout, ce principe. L\'hypothèse que le lexique a contribué à l\'absence de consensus. Le terme impersonnel fait confondre l\'être impersonnel avec lactuar impersonnellement, comme semble dire la disposition constitutionnelle. Après quelques considérations concernant le contexte constitutionnel - qui inverse le point de référence pour être humain -, sur le Droit administratif - les données historiques, les caractéristiques, etc. -, c\'est une recherche bibliographique pour découvrir ce qu\'ils pensent les auteurs qui ont écrit sur lui. Puis, après l\'examen des termes impersonnel et impersonnalité et certaines considérations au sujet de la vision d\'interprètes de l\'expérience administrative du Brésil, nous sommes arrivés ce qui semble signifier le principe d\'impersonnalité: une nouvelle conception du monde pour la fonction administrative - la processualité et le contrôle finalistiques.

A lei das financeiras deve se preocupar com o estudo de eficiência no desempenho da atividade financeira do Estado, considerando a dimensão humana no uso de recursos financeiros como instrumento corretor de diferenças sócio-econômicas para reduzir a desigualdade e promover o valor da dignidade humana. Neste contexto, estudamos o conteúdo jurídico do princípio da eficiência de direito público no âmbito do direito financeiro, após a aprovação da Emenda Constitucional n º 19 de 1998, que alterou o caput do artigo 37 da Constituição Federal do Brasil de 1988, estudando o impacto desse princípio na atividade financeira do Estado uma vez que o significado da eficiência no setor público é a prestação de serviços públicos de melhor qualidade e com melhor custo financeiro. / La loi des finances publiques devrait être concerné par l\'étude de l\'efficacité dans l\'exercice de l\'activité financière de l\'État, compte tenu de la dimension humaine, l\'utilisation des ressources financières tant que courtier d\'instrument différences socio-économiques pour réduire les inégalités, promouvoir la valeur de la dignité humain. Dans ce contexte, nous avons étudié le contenu juridique du principe de l\'efficacité de droit public en vertu de la loi de finances, après l\'adoption de l\'amendement constitutionnel n ° 19 de 1998, qui a modifié le texte introductif de l\'article 37 de la Constitution fédérale du Brésil en 1988 étudier l\'impact de ce principe sur l\'activité financière de l\'Etat depuis la signification de l\'efficience dans le secteur public est la fourniture de services publics de meilleure qualité et un meilleur rapport coût financier.

Cette thèse est divisée en deux parties, le fil directeur étant la contrôlabilité en temps optimal.Dans la première partie, après un rappel du principe du maximum de Pontryagin dans le cas des systèmes de dimension finie, nous mettrons en oeuvre ce principe sur le cas d'un intégrateur non-holonome connu sous le nom de système de Brockett pour lequel nous imposons des contraintes sur l'état. La difficulté de cette étude provient du fait que l'on considère un problème de contrôle avec des contraintes sur l'état. Après cet exemple, nous nous intéressons à une extension du principe du maximum de Pontryagin au cas des systèmes de dimension infinie. Plus précisément, l'extension que nous considérons s'applique au cas de systèmes exactement contrôlables en tout temps. Typiquement, ce résultat s'applique à l'équation de Schrödinger avec contrôle interne. Pour de tels systèmes, sous une condition de contrôlabilité approchée, depuis un ensemble de temps non négligeable, nous montrons l'existence d'un contrôle bang-bang. Dans la seconde partie, nous étudions le problème de la nage à bas nombre de Reynolds. Une modélisation physique convenable nous permet de le formaliser comme un problème de contrôle. Nous obtenons alors un résultat de contrôlabilité sur ce problème. Plus précisément, nous montrons que quelque soit la forme du nageur, celui-ci peut se déformer légèrement pour suivre une trajectoire imposée. Nous étudions ensuite le cas d'un nageur à symétrie axiale. Les résultats de la première partie permettent alors la recherche d'un contrôle en temps optimal / This thesis is divided in two parts. The main tool of this work is time optimal control. We first consider the Pontryagin maximum principle for control system of finite dimension. After that, we give an application of this principle for the Brockett integrator with state constraints. Then, we study an extension of the Pontryagin maximum principle in the case of infinite dimensional systems. More precisely, this extension concerns the case of exactly controllable systems in any time. For instance, this can be the Schrödinger equation with internal control. Especially under some condition of approximate controllability, we can show the existence of a bang-bang control defined on a time set of positive measure. In the second part, we study the problem of swimming at low Reynolds number. A convenient physical model allows us to formulate it under the form of a control problem. We then get a controllability result on this problem. More precisely, we will show that whatever the shape of the swimmer is, the swimmer can slightly modify its shape in order to steer any prescribed trajectory. To complete this part, we consider the case of an axi-symmetric swimmer. The results of the first part allow us to find an optimal time control

O objetivo dessa dissertação é apresentar um dicionário bilíngue principense/português, bem como seu processo de produção. O dicionário foi elaborado a partir de dados coletados em trabalho de campo original obtidos em viagens à ilha do Príncipe e da compilação de dados retirados da literatura. No que diz respeito à microestrutura dos verbetes, o dicionário contém anotação (ortográfica, transcrição fonética, rubrica gramatical e equivalência em português. Neste trabalho, também apresento uma abordagem da problemática do acesso à língua, da coleta de dados e da formação desse tipo de lista. Todo o material foi anotado considerando a proposta ortográfica do ALUSTP (Alfabeto Unificado para a Escrita das Línguas Nativas de S. Tomé e Príncipe), aprovada em 2012 pelo Governo de São Tomé e Príncipe como grafia oficial das línguas nacionais. Em última análise, disponibilizamos um instrumento linguístico que poderá ser útil tanto para os habitantes da ilha do Príncipe como para a comunidade científica e, dessa forma, preencher uma lacuna em relação à inexistência de materiais paradidáticos bilíngues principense/português, que possa auxiliar no ensino da língua principense nas escolas. / The aim of this work is to present a bilingual dictionary Principense-Portuguese, as well as explain the proceedings taken in the compilation. The dictionary was compiled from data collected in original fieldwork obtained on trips to the island of Principe and compiling data from the literature. Regarding the microstructure of the lexical entries, the dictionary contains annotation (spelling, phonetic transcription, grammatical category and the equivalent in Portuguese. This paper also presents an approach to issues of access to language, data collection and formation of such list. All material was recorded considering the draft of Alfabeto Unificado das Línguas Nativas de São Tomé e Príncipe- ALUSTP (Unified Alphabet for the Writing of Native Languages of São Tomé and Príncipe), approved in 2012 by the Government of São Tome and Príncipe as an official orthography to the national languages. In conclusion, we provide a linguistic tool that can be useful both for the inhabitants of the island of Principe, as to the scientific community and thus fill a gap in relation to the lack of bilingual educational materials Principense-Portuguese, that can provide assistance in teaching principense language in schools.