Tesis:

1

Batista, Valdirene Barboza de. "A jornada do herói nas narrativas juvenis de Giselda Laporta Nicolelis". Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153405.

Texto completo

Resumen

Submitted by VALDIRENE BARBOZA DE ARAÚJO BATISTA null (valdirenebab@gmail.com) on 2018-04-05T11:41:10Z No. of bitstreams: 1 Tese Valdirene Barboza de Araújo Batista.pdf: 3271297 bytes, checksum: 250eb7c885c1811b08351c67d60601cd (MD5)
Approved for entry into archive by Maria Luiza Carpi Semeghini (luiza@assis.unesp.br) on 2018-04-05T20:11:06Z (GMT) No. of bitstreams: 1 batista_vb_dr_assis.pdf: 3271297 bytes, checksum: 250eb7c885c1811b08351c67d60601cd (MD5)
Made available in DSpace on 2018-04-05T20:11:06Z (GMT). No. of bitstreams: 1 batista_vb_dr_assis.pdf: 3271297 bytes, checksum: 250eb7c885c1811b08351c67d60601cd (MD5) Previous issue date: 2018-02-05
Desenvolvida na esfera das pesquisas sobre literatura juvenil brasileira contemporânea, esta tese de doutoramento tem como objeto de estudo 42 narrativas de autoria da escritora paulista Giselda Laporta Nicolelis (1938) que circulam sob essa rubrica. No contexto desta investigação, os títulos escolhidos são agrupados em três grandes categorias narrativas (narrativas de aventura, narrativas sociais e narrativas psicológicas), segundo os moldes propostos por Ceccantini (2000). Com o objetivo de alcançar uma compreensão geral do universo ficcional criado por Nicolelis, o trabalho acompanha a jornada dos heróis nicolelianos, realizando uma análise sistemática dos elementos temáticos e formais das narrativas que compõem o corpus, bem como discute questões relativas à produção, circulação e consumo da literatura juvenil dessa escritora, sob o amparo teórico de Pierre Bourdieu (2007) acerca do mercado de bens simbólicos. Essa análise evidenciou que as narrativas da escritora são representativas de certa linhagem da literatura juvenil brasileira de cunho realista/verista (Zilberman, 2003), em que os heróis (e, por extensão, seus leitores) são lançados na jornada contemporânea das mazelas sociais oriundas do subdesenvolvimento da sociedade brasileira – na sua vertente urbana, capitalista e industrializada –, estando sempre afastados das posições de poder. Na tentativa de resolver problemas sociais indissolúveis, guiados por um narrador de visão adultocêntrica, os heróis são inseridos no contexto de dicotomias que perpassam a literatura infantojuvenil desde suas origens. Dentre elas, são destacadas: a assimetria adulto/criança; discurso utilitário X discurso literário; realismo X fantasia; normatividade X ruptura. Ainda que se note a tentativa de inovação no nível temático, a presença preponderante de padrões literários tradicionais no nível formal faz com que essas narrativas não ultrapassem geralmente certos propósitos pedagogizantes. Assim, Nicolelis, ainda que almejando libertar e conscientizar seus leitores, muitas vezes, não alcança, no plano literário, a representação do homem em toda sua humanidade, enclausurando seus heróis na permanência do status quo social contemporâneo. Além dos pesquisadores já mencionados, a pesquisa tem como referencial teórico estudos desenvolvidos por Candido (1972; 2011), Perrotti (1986), Campbell (1997), Novaes (1984; 2000; 2006), Colomer (2003), Cruvinel (2009), Luft (2010), Souza (2015), Vogler (2015), entre vários outros.
Developed in the research area of contemporary Brazilian young adult literature, this dissertation has as its object of study 42 narratives written by Giselda Laporta Nicolelis (1938), which circulate under this rubric. In the context of this investigation, the chosen titles are grouped into three major narrative categories (adventure narratives, social narratives, and psychological narratives), according to the models proposed by Ceccantini (2000). In order to reach a general understanding of the fictional universe created by Nicolelis, this dissertation follows the journey of her heroes through a systematic analysis of both thematic and formal elements of the narratives that compose the corpus, as well it discusses issues related to the production, circulation and consumption of the author’s young adult literature, theoretically grounded in Pierre Bourdieu’s (2007) work about the market of symbolic goods. This analysis evidenced that the author's narratives are representative of a certain lineage of Brazilian realist/veristic literature (Zilberman, 2003), in which heroes (and, by extension, their readers) are launched in a contemporary journey of the social illness derived from the underdevelopment of Brazilian society - in its urban, capitalist, and industrialized dimension -, always away from the positions of power. In the illusory and quixotic attempt to solve indissoluble social problems, guided by a narrator which has an adultcentric point-of-view, the heroes are inserted in the context of dichotomies that pervade both children's and young adult's literature since its origins. Among them, we can highlight the following: the asymmetry between adult and child; utilitarian discourse versus literary discourse; realism versus fantasy; normativity versus rupture. Although the attempt to innovate at the thematic level can be noticed, the preponderant presence of traditional literary patterns at the formal level shows that these narratives do not usually exceed certain pedagogic purposes. Thus, although Nicolelis aims to provide a sense of freedom and to raise awareness in her readers, she often does not reach the representation of man in all his humanity in the literary plane. As a consequence of that, some of her characters are cloistered in a permanent status quo. Beyond the authors already mentioned, this research has as theoretical background studies developed by Candido (1972; 2011), Perrotti (1986), Campbell (1997), Novaes (1984; 2000; 2006), Colomer (2003), Cruvinel (2009), Luft (2010), Souza (2015), Vogler (2015), among others.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Batista, Valdirene Barboza de Araújo. "A jornada do herói nas narrativas juvenis de Giselda Laporta Nicolelis /". Assis, 2018. http://hdl.handle.net/11449/153405.

Texto completo

Resumen

Orientador: João Luís Cardoso Tápias Ceccantini
Banca: Alice Aurea Penteado Martha
Banca: Juvenal Zanchetta Junior
Banca: Eliane Aparecida Galvão Ribeiro Ferreira
Banca: Luciana Brito
Resumo: Desenvolvida na esfera das pesquisas sobre literatura juvenil brasileira contemporânea, esta tese de doutoramento tem como objeto de estudo 42 narrativas de autoria da escritora paulista Giselda Laporta Nicolelis (1938) que circulam sob essa rubrica. No contexto desta investigação, os títulos escolhidos são agrupados em três grandes categorias narrativas (narrativas de aventura, narrativas sociais e narrativas psicológicas), segundo os moldes propostos por Ceccantini (2000). Com o objetivo de alcançar uma compreensão geral do universo ficcional criado por Nicolelis, o trabalho acompanha a jornada dos heróis nicolelianos, realizando uma análise sistemática dos elementos temáticos e formais das narrativas que compõem o corpus, bem como discute questões relativas à produção, circulação e consumo da literatura juvenil dessa escritora, sob o amparo teórico de Pierre Bourdieu (2007) acerca do mercado de bens simbólicos. Essa análise evidenciou que as narrativas da escritora são representativas de certa linhagem da literatura juvenil brasileira de cunho realista/verista (Zilberman, 2003), em que os heróis (e, por extensão, seus leitores) são lançados na jornada contemporânea das mazelas sociais oriundas do subdesenvolvimento da sociedade brasileira - na sua vertente urbana, capitalista e industrializada -, estando sempre afastados das posições de poder. Na tentativa de resolver problemas sociais indissolúveis, guiados por um narrador de visão adultocêntrica, os heróis são inseridos ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Developed in the research area of contemporary Brazilian young adult literature, this dissertation has as its object of study 42 narratives written by Giselda Laporta Nicolelis (1938), which circulate under this rubric. In the context of this investigation, the chosen titles are grouped into three major narrative categories (adventure narratives, social narratives, and psychological narratives), according to the models proposed by Ceccantini (2000). In order to reach a general understanding of the fictional universe created by Nicolelis, this dissertation follows the journey of her heroes through a systematic analysis of both thematic and formal elements of the narratives that compose the corpus, as well it discusses issues related to the production, circulation and consumption of the author's young adult literature, theoretically grounded in Pierre Bourdieu's (2007) work about the market of symbolic goods. This analysis evidenced that the author's narratives are representative of a certain lineage of Brazilian realist/veristic literature (Zilberman, 2003), in which heroes (and, by extension, their readers) are launched in a contemporary journey of the social illness derived from the underdevelopment of Brazilian society - in its urban, capitalist, and industrialized dimension -, always away from the positions of power. In the illusory and quixotic attempt to solve indissoluble social problems, guided by a narrator which has an adultcentric point-of-view, the heroes are inserted in the context of dichotomies that pervade both children's and young adult's literature since its origins. Among them, we can highlight the following: the asymmetry between adult and child; utilitarian discourse versus literary discourse; realism versus fantasy; normativity versus rupture... (Complete abstract click electronic access below)
Doutor

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Atienza, Rodríguez Manuel. "Imperio de la ley y constitucionalismo Un diálogo entre Manuel Atienza y Francisco Laporta". Pontificia Universidad Católica del Perú, 2008. http://repositorio.pucp.edu.pe/index/handle/123456789/116548.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Eriksson, Ingela. "Flödeslogistik vid Laponia Hotel". Thesis, Linköping University, Department of Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1655.

Texto completo

Resumen

The aim of this report is to analyse the logistics of a medium sized restaurant and give an overall solution for improvements on the restaurant's logistics. The restaurant of interest belongs to Laponia Hotel and is located in Arvidsjaur, Sweden. Investments for over 100.000 Euros are planned for the hotel, which includes a reconstruction of the restaurant. The details on how the restaurant will be reconstructed are not yet known. I therefore chose to analyse the problemin general terms and find a solution that is focused on the logistic system itself rather than its layout.

In order to find the best system I have chosen to analyse three different logistic models, each representing different levels of logistic systems. The first model, representing the logistics of a small restaurant, is named ´the simple logistic model´ and has a manual system. The second method is called ´the complex logistic model´. This model describes the hotel that is too small to afford a full-scale computer system, and too complex to operate with only a manual system. The last model is'the advanced logistic model'and it is meant to represent the full-scale logistics with all necessary computer aid.

The models are analysed by the SWOT method and the materials used are found through literature research, interviews and observations. The analyse shows that the best model for Laponia Hotel's restaurant would be the advanced logistic model in combination with the simple logistic model. This would allow the restaurant to use all the benefits of computer aid and large quantities without loosing the small-scale feeling of ownership and responsibility among the employees.

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

St-Pierre, David. "Maurice Laporte, militant : du communisme à l'anticommunisme (1916-1929)". Master's thesis, Université Laval, 2004. http://hdl.handle.net/20.500.11794/17934.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Santos, Guilherme Ide Marques dos. "Análise cladística da tribo Megacephalini Laporte, 1834 (Coleoptera: Carabidae: Cicindelinae)". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-09012013-090053/.

Texto completo

Resumen

A tribo Megacephalini é composta por 17 gêneros e aproximadamente 240 espécies distribuídas nos continentes americano, africano e Oceania e tem como principal sinapomorfia a carena pronotal lateral projetando-se além da margem anterior do prosterno. Essa tribo já sofreu muitas modificações e atualmente, como resultado de análises filogenéticas baseadas em dados moleculares e dados morfológicos de larvas, teve sua monofilia questionada existência duvidada. Foi feito um estudo filogenético baseado principalmente em caracteres morfológicos de adultos para testar a monofilia do grupo, assim como investigar as relações entre os subgrupos que o forma. Para tal, 233 caracteres foram levantados, sendo 232 relacionados à morfologia externa e um sobre a biologia; alguns caracteres foram estudados pela primeira vez em uma filogenia de Carabidae, com destaque para o escutelo, que se mostrou bastante informativo para os agrupamentos das subtribos. Os quatro cladogramas igualmente mais parcimoniosos (960 passos) obtidos revelaram que a tribo é monofilética, sendo necessário apenas excluir uma espécie da hipótese inicial (Callidema boussingaultii) e incluir um ou dois gêneros (Mantica e Manticora), inicialmente considerados externos à tribo. Além da confirmação da existência do grupo, foi apresentada uma nova hipótese de classificação, onde a tribo Megacephalini é formada por 3 subtribos: Manticorina, Oxycheilina e Megacephalina; Manticorina grupo-irmão das outras duas subtribos, estas formando juntas um grupo natural
The tribe Megacephalini is composed of 17 genera and approximately 240 species spread throughout the Americas, Africa, Europe, and Oceania. The main synapomorphy of the group is the lateral pronotal ridge that extends beyond the anterior margin of the mesosternum. The classification of the tribe has undergone changes through the past few decades and recently, based on molecular characters and larval data, its validity has been questioned. A phylogenetic study based mainly on morphological data was done to test the monophyly of the group as well as to investigate the relations of its subgroups. For the analysis, 233 characters were used. From those, 232 related to the external morphology and one to the biology; some characters were used for the first time in a Carabidae phylogenetic study, such as the scutellum, which has proven to be very important for subtribes determination. The four most parsimonious trees (length = 960) show that the tribe is monophyletic, with the exclusion of one species (Callidema boussingaultii), and the addition of one or two genera (Mantica and Manticora), formerly not considered part of the tribe. In addition to the confirmation of the monophyly of the tribe, a new classification hypothesis is presented, in which the tribe is formed by three subtribes: Manticorina, Oxycheilina, and Megacephalina; Manticorina as sister group of the other two, and those together comprising a natural group

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Lamoureux, Luc. "Étude sur l'utilisation du système GPS pour l'auscultation topographique du pont Pierre-Laporte". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0004/MQ33685.pdf.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Maclachlan, Ian. "The Orphic text : writing and the origin in the works of Roger Laporte". Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335708.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Omidinia, Anarkoli Abdolrahman Verfasser], Laporte Laura [Akademischer Betreuer] De y Matthias [Akademischer Betreuer] [Wessling. "Fiber spinning for tissue engineering applications / Abdolrahman Omidinia Anarkoli ; Laura De Laporte, Matthias Wessling". Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/123331596X/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Gehlen, David Benedikt Verfasser], Laporte Laura [Akademischer Betreuer] De y Ulrich [Akademischer Betreuer] [Schwaneberg. "Microgel-based Regenerative Materials and Biofunctionalization / David Benedikt Gehlen ; Laura De Laporte, Ulrich Schwaneberg". Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1240390955/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Guerzoni, Luis Paulo Busca Verfasser], Laporte Laura [Akademischer Betreuer] De y Martin [Akademischer Betreuer] [Möller. "Microfluidic-based microgels for biomedical applications / Luis Paulo Busca Guerzoni ; Laura De Laporte, Martin Möller". Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1240765444/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Domeneguetti, Rafael Romano. "Desenvolvimento "in situ" de nanocompósitos de celulose bacteriana contendo laponita /". Araraquara, 2018. http://hdl.handle.net/11449/153894.

Texto completo

Resumen

Orientador: Sidney Jose Lima Ribeiro
Coorientador: Hernane da Silva Barud
Banca: Patrícia Bento da Silva
Banca: Rosana Maria Nascimento de Assunção
Resumo: A celulose bacteriana (CB) é um nanomaterial que pode ser obtido a partir de bactérias do gênero Gluconacetobacter. O material é formado por uma rede de fios nanométricos que lhe confere enorme área superficial, surpreendente capacidade de absorção e retenção de água, boa elasticidade e fácil moldabilidade. O material também é biodegradável, biocompatível, atóxico e não alergênico. A CB pode ser sintetizada a partir de uma variedade de fontes de carbono, através de bactérias que são capazes de converter glicose à celulose como parte de seu metabolismo. Assim, a glicose atua não somente como fonte de energia para o microrganismo, mas também como precursora da biossíntese de CB. A CB produzida na superfície do meio de cultura pela bactéria Gluconacetobacter xylinus foi utilizada para a produção in situ de nanocompósitos com propriedades químicas e físicas modificadas devido a presença de laponita (LPN) que possui composição bem definida e livre de impurezas insolúveis, como partículas de sílica e óxidos de ferro. As dimensões nanométricas dessas argilas, aliadas ao seu formato circular e capacidade de produzir materiais transparentes, como filmes e dispersões, auxiliam na obtenção de nanocompósitos de alta homogeneidade. Neste trabalho foi realizada a preparação e caracterização de nanocompósitos de CB, por meio da incorporação "in situ" de LPN. Os filmes CB/LPN foram caracterizados morfologicamente, por microscopia eletrônica de varredura com EDS e microscopia de força atômica... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Bacterial cellulose (CB) is a nanomaterial that can be obtained from bacteria of the genus Gluconacetobacter. The material is formed by a network of nanometric wires that gives it enormous surface area, surprising capacity of water abs orption and retention, good elasticity and easy moldability. The material is also biodegradable, biocompatible, non - toxic and non - allergenic. CB can be synthesized from a variety of carbon sources, through bacteria that are able to convert glucose to cellu lose as part of their metabolism. Thus, glucose acts not only as a source of energy for the microorganism, but also as a precursor of CB biosynthesis. The CB produced on the surface of the culture medium trough the bacterium Gluconacetobacter xylinus was u sed for the in situ production of nanocomposites with chemical and physical properties m odified due to the presence of l aponite (LPN) that has a well defined composition and free of insoluble impurities, as particles of silica and iron oxides. The nanometr ic dimensions of these clays, combined with their circular shape and the ability to produce transparent materials, such as films and dispersions, help to obtain nanocomposites of high homogeneity. In this work the preparation and characterization of CB nan ocomposites was carried out by the in situ incorporation of LPN. The CB/LPN films were characterized morphologically by scanning electron microscopy with EDS and atomic force microscopy. Structurally, by X - ray diffraction, t he... (Complete abstract click electronic access below)
Mestre

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

LEITE, G. R. "Biogeografia do gênero Triatoma Laporte, 1832 (Hemiptera, Reduviidae, Triatominae): distribuição, padrões de riqueza, endemismo, e diversificação". Universidade Federal do Espírito Santo, 2013. http://repositorio.ufes.br/handle/10/4361.

Texto completo

Resumen

Made available in DSpace on 2016-08-29T15:33:48Z (GMT). No. of bitstreams: 1 tese_6384_Gustavo Rocha Leite.pdf: 21894863 bytes, checksum: 9470d593124dbfd5ce2954ffcdb980c4 (MD5) Previous issue date: 2013-03-26
O gênero Triatoma Laporte, 1832 agrupa espécies responsáveis pela transmissão do Trypanosoma cruzi. De suas 82 espécies descritas, 73 ocorrem nas Américas, sete na Ásia e Oceania, uma é tropicopolita, e uma é fóssil. O objetivo deste estudo é: (1) por meio de uma revisão bibliográfica detalhada e exaustiva, compilar informações sobre a ocorrência das 82 espécies agrupadas no gênero Triatoma, e, a partir destes dados, delinear a distribuição atualizada de cada espécie em resolução alta, com auxílio de modelos de distribuição; e (2) a partir destes dados, buscar padrões biogeográficos de Triatoma por meio de ferramentas da panbiogeografia, com o intuito de reconhecer homologias primárias e confrontá-las com hipóteses filogenéticas do gênero, e então discutir sobre a história, evolução, diversificação, e agrupamento do clado. Apresentamos, além dos mapas de distribuição atualizados, uma descrição breve de cada uma das espécies, onde informamos os aspectos distribucionais, ecológicos, e epidemiológicos mais importantes e atuais, além de taxonômicos, quando pertinente. Para as análises da panbiogeografia, submetemos os dados a análises geométrica e parcimoniosa de traços, e parcimoniosa de endemismo, todas elas em variadas escalas (16º). Analisamos os padrões de distribuição obtidos, juntamente com filogenias do grupo, para inferir áreas de diversificação e eventos de cladogênese. Nove traços generalizados e cinco áreas de endemismo foram identificados e associados a eventos geológicos e a história do grupo. As mais prováveis e consistentes áreas de diversificação identificadas se localizam: (1) no centro-sul do México (grupo Rubrofasciata); (2) no extremo noroeste da América do Sul, acompanhando a zona de transição sul americana em sua extensão inicial (extremo norte da Cordilheira dos Andes) na Colômbia e Equador (grupo Dispar); (3) na região meridional e centro-sul da Cordilheira dos Andes, no Norte da Argentina (grupo Infestans); (4) nos limites sul do Brasil e norte do Uruguai (grupo Infestans); e (5) na região Nordeste do Brasil, abrangendo os biomas Caatinga e Cerrado (grupo Infestans).

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Nilsson, Dahlström Åsa. "Negotiating wilderness in a cultural landscape : predators and Saami reindeer herding in the Laponian world heritage area /". Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3446.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Arroyas, Frédérique A. Y. "La lecture musico-littéraire, a l'écoute de Passacaille de Robert Pinget et de Fugue de Roger Laporte". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ28473.pdf.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Valencia, Germán Ayala. "Propriedades físicas de filmes à base de biopolímeros reforçados com laponita". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/74/74132/tde-31072017-094541/.

Texto completo

Resumen

Os problemas ambientais provocados pelas embalagens à base de materiais sintéticos não biodegradáveis têm provocado um importante aumento nos estudos sobre filmes à base de biopolímeros. Entretanto, esses filmes têm limitações em suas propriedades, devido, sobretudo à sensibilidade a umidade relativa ambiente. Dentre as alternativas estudadas para melhorar as características desses materiais está o uso de nanopartículas, com destaque para a montmorilonita, que tem problemas de dispersão em água. Outra nanopartícula pouco usada em estudos à base de biopolímeros é a laponita, que é uma nanoargila sintética. Assim, o objetivo geral desta tese foi o desenvolvimento de filmes à base de biopolímeros (colágeno, gelatina e fécula de mandioca), reforçados com uma nanoargila (laponita). Foi estudado o efeito da concentração do biopolímero e da laponita, assim como o método de produção dos filmes (casting e espalhamento mecânico), além da qualidade da dispersão da nanopartícula, sobre as principais propriedades físicas dos filmes nanocompósitos, com especial interesse nas propriedades de superfície. Os filmes foram preparados pela desidratação de soluções formadoras de filmes (SFF), com 2, 4 ou 8 g de biopolímero/100 g SFF; 25 ou 30 g glicerol/100 g de biopolímero; e 0, 1,5; 3; 4,5 e 6 g laponita/100 g de biopolímero. A laponita foi dispersa em água destilada, utilizando-se ultraturrax com velocidade de agitação de 20.000 rpm, por 30 minutos. As partículas de laponita em água tiveram tamanhos menores que 50 nm. Não houve efeito da concentração do biopolímero, nem do método de produção (casting ou espalhamento mecânico) sob as propriedades de topografia superficial e físico-químicas estudadas nos filmes nanocompósitos. As análises de raios X e espectroscopia de infravermelho por transformada de Fourier revelaram que as plaquetas de laponita estiveram esfoliadas e/ou intercaladas nos filmes, e que não houve nenhuma formação de ligação química entre as plaquetas de laponita e os biopolímeros em estudo. A presença de laponita incrementou a irregularidade superficial dos filmes, especialmente naqueles produzidos com colágeno e fécula de mandioca. Outras propriedades dos filmes nanocompósitos, tais como densidade, umidade, cor, opacidade, propriedades térmicas, propriedades mecânicas, solubilidade em água, ângulo de contato à água, isotermas de sorção e permeabilidade ao vapor de água não sofreram alterações com a presença de laponita.
The environmental problems caused by packaging based on non-biodegradable synthetic materials have lead to a significant increase in studies about biopolymer films. However, these films have limited physicochemical properties due mainly to its sensitivity to ambient relative humidity. Among the alternatives studied to improve the physicochemical properties of these materials is the use of nanoparticles, especially the montmorillonite, which has problems of dispersion in water. Another nanoparticle no so much studied in films based on biopolymers is laponite, which is a synthetic nanoparticle. Thus, this these aims to development and characterize films based on biopolymers (collagen, gelatin and cassava starch), with a nanoparticle (laponite). The effects of biopolymer and laponite concentrations were studied, as well as, the film production method (casting and spreading), besides the quality of laponite dispersion and its relationship with the physicochemical properties of the films were investigated, with special interest on the surface properties. The films were produced by the dehydration of filmogenic-forming solutions (FFS), with 2, 4 or 8 g of biopolymer/100 g FFS; 25 or 30 g glycerol/100g of biopolymer; and 0, 1.5, 3, 4.5 and 6 g of laponite/100g of biopolymer. The laponite was dispersed in water using ultraturrax, at 20,000 rpm, for 30 minutes. The laponite particles in water had sizes smaller than 50 nm. There was not effect of biopolymer concentration and film production method (casting or spreading) on the surface and physicochemical properties studied in the nanocomposite films. X-ray analysis and Fourier transform infrared spectroscopy revealed that laponite platelets were exfoliated and/or intercalated in the films, and that there were no formed chemical bonds between laponite platelets and the biopolymers studied. The presence of laponite increased the surface irregularity of the films, especially in those produced with collagen and cassava starch. Other properties in the nanocomposite films, such density, moisture content, color, opacity, thermal properties, mechanical properties, water solubility, water contact angle, sorption isotherms and water vapor permeability were not altered by the presence of laponite.

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Andrade, Danielle Alexandrino de. "Síntese de nanopartículas de ferrita de cobalto em solução de laponita". reponame:Repositório Institucional da UnB, 2013. http://repositorio.unb.br/handle/10482/15439.

Texto completo

Resumen

Dissertação (mestrado)—Universidade de Brasília, Programa de Pós-Graduação em Ciência de Materiais, 2013.
Submitted by Alaíde Gonçalves dos Santos (alaide@unb.br) on 2014-04-09T12:40:49Z No. of bitstreams: 1 2013_DanielleAlexandrinodeAndrade.pdf: 15406653 bytes, checksum: b70bc05954e0db96efdc43f18c2ed327 (MD5)
Approved for entry into archive by Guimaraes Jacqueline(jacqueline.guimaraes@bce.unb.br) on 2014-04-11T13:47:31Z (GMT) No. of bitstreams: 1 2013_DanielleAlexandrinodeAndrade.pdf: 15406653 bytes, checksum: b70bc05954e0db96efdc43f18c2ed327 (MD5)
Made available in DSpace on 2014-04-11T13:47:31Z (GMT). No. of bitstreams: 1 2013_DanielleAlexandrinodeAndrade.pdf: 15406653 bytes, checksum: b70bc05954e0db96efdc43f18c2ed327 (MD5)
As nanopartículas magnéticas são investigadas devido às suas propriedades únicas e para muitas aplicações como dispositivos de armazenamento de dados, imagens médicas e catálise. A rota hidrotermal de co-precipitação é o processo de bottom-up mais aplicado de síntese química, permitindo a obtenção de partículas em escala nanométrica com composição controlada. Recentemente um composto magnético contendo nanopartículas de óxido de ferro maguemita incorporado em uma matriz de argila sintética, preparada por uma nova rota química de um passo, foi relatada na literatura. Aqui utilizando uma abordagem hidrotérmica semelhante sintetizamos nanopartículas de CoFe2C>4 utilizando uma solução de Laponita em fase líquida isotrópica a 0,5% em meio alcalino (pH = 10). A estrutura cristalina, bem como o diâmetro médio das nossas nanopartículas sintetizadas são deduzidas a partir dos padrões de difração do raios-X e é igual a 13 nm. A composição química das nanopartículas foi verificada por meio de dicromatometria no caso dos íons de ferro e de Espectroscopia de Energia Dispersiva de Raio-X a fim de determinar a relação estequiométrica entre Co2+ /Fe3+ions. A caracterização da temperatura ambiente magnética foi realizada em um VSM / PPMS magnetômetro por campo até 90 kOe e mostra uma histerese com Hc = 330 Oe, Hirr = 4200 Oe e MS (300 K) = 42 emu/g. ______________________________________________________________________________________ ABSTRACT
Magnetic nanoparticles are investigate due to their unique properties and to many applications as data storage devices, medical imaging and catalysis. The hydrothermal co¬precipitation route is the mostly applied bottom-up chemical synthesis process, It allows obtaining particles at nanometric scale with controlled composition. Recently a magnetic composite containing iron oxide maghemite nanoparticles embedded in a synthetic clay matrix, prepared by a new one step chemical route, was reported in the literature. Here by using a similar hydrothermal approach we have synthesized CoFe204 nanoparticles using a 0.5% isotropic liquid phase laponite solutions in alkaline medium (pH =10). The crystalline structure as well as the mean diameter of our synthesized nanoparticles are deduced from X- ray diffraction patterns and equals to 13 nm. The nanoparticles chemical composition was verified by dicromatometry in the case of iron ions and by Energy Dispersive X-Ray Spectroscopy (EDX) in order to determine the stoichiometric relation between Co /Fe ions. Room temperature magnetic characterization was performed in a VSM/PPMS magnetometer for field up to 90 kOe and shows a hysteresis with He = 330 Oe, Hirr = 4200 Oe and ms (300 K) = 42 emu/g.

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Laporte, Chervin F. P. [Verfasser] y Simon D. M. [Akademischer Betreuer] White. "Evolution of clusters and large-scale structures of galaxies / Chervin F. P. Laporte. Betreuer: Simon D. M. White". München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1058077198/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Paleari, Lucia Maria. "Aspectos ecologicos e biossistematicos de policromismo em Agonosoma flavolineatum Laporte, 1832 (pentatomidae: scutellerinae) e revisão sistematica do genero". [s.n.], 1987. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316141.

Texto completo

Resumen

Orientador: Mohamed E. M. Habib
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-07-15T04:12:00Z (GMT). No. of bitstreams: 1 Paleari_LuciaMaria_M.pdf: 6962566 bytes, checksum: c6e4ce0036b429c6b4de1cc107053303 (MD5) Previous issue date: 1987
Resumo: Agonosoma flavolineatum (Hemiptera, Scutellerinae), é uma espécie policromática e fitófaga, cujas fêmeas apresentam três fenótipos distintos, sendo um deles comum ao macho. Essas várias colorações dos indivíduos, são semelhantes às de outras espécies do gênero, o que tem levado a problemas na classificação e identificação das espécies. Uma revisão do gênero foi feita na tentativa de esclarecer as denominações das espécies, caracterizando-as através dos padrões de coloração, e de algumas estruturas como antenas e esternitos. No caso específico de A. flavolineatum, a caracterização foi reforçada com os estudos de biologia e do cariótipo da espécie, que possui 10 autossomos e um par de cromossomos sexuais, sendo o macho o sexo heterogamético XY. Como acontece com muitos pentatomídeos, esses cromossomos são do tipo que não apresenta centrômero localizado. De acordo com os critérios utilizados foram propostas 4 espécies para o gênero: A. flavolineatum, A. trillineatum, A. bicolor e A. dohrni. Os estudos de biologia de A. flavoloneatum demonstraram que os machos acasalam-se indistintamente com fêmeas dos diferentes padrões tendo em todos os casos, descendentes férteis. Sob médias mensais de temperatura e Umidade Relativa do ar que variaram de '18,6 GRAUS¿C a '27,4 GRAUS¿C e 57,7% a 70,8%, respectivamente, a duração média em dias, + o erro padrão, do ciclo de vida das fêmeas foi de 156,90¿+ OU ¿'10,74, e dos machos de 166,08¿+ OU ¿'10,62 dias, com intervalos de 59 a 392 e 91 a 354 dias, respectivamente. ...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Agonossoma flavolineatum (Hemiptera, Scutellerinae), is a polychromatic and phytophagous specie, whose females show three distinct phenotypes, and only one of them is similar to that of the male. These differentiation on color among the individuaIs, are analogous to other species of the same genus resulting in problems for classification and identification. A revision of the genus was made in order to clarify the species denomination, characterizing them throw the coloration patterns, and throw some other structures like antennae and sternites. In the specific case of A. flavolineatum, the characterization was reforced by biological studies and species cariotype, which has 10 autosomes and a par of sexuaI chromosomes, being the male the heterogametic XY sex. How lt's usual to happen with several pentatomides, these chromosomes are of the type that doesn't present a localized centromer. According to the utilized criteria, 4 species were proposed for the genus: A. flavolineatum, A. trilineatum, A. bicolor, and A. dohrni. The biological studies of A. flavolineatum showed that males couple with the different female patterns, having in all cases, fertile offspring. Under monthly temperature and relative air humidity means that change between '18,6 DEGREES¿C and '27,4 DEGREES¿C, and 57,7% and 70,8% respectIvely, the medium duration, 10 days more or less the standard deviation of the female life cycles were found to be 156,9 '+ OU ¿' 10,74, and the males 166,08 '+ OU ¿' 10,62 days, with intervals of 59 to 392 days and 91 to 354 days, respectively. ...Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Ecologia
Mestre em Ciências Biológicas

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Laporte, Chervin [Verfasser] y Simon D. M. [Akademischer Betreuer] White. "Evolution of clusters and large-scale structures of galaxies / Chervin F. P. Laporte. Betreuer: Simon D. M. White". München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-173152.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Rådelius, Christina. "Självstyre eller samförvaltning? : problem och möjligheter utifrån en studie av världsarvet Laponia". Licentiate thesis, Luleå, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17061.

Texto completo

Resumen

Because of its importance for indigenous biodiversity and the local Sami culture, the Laponian area, in the north of Sweden, was declared a World Heritage Site Area by the UN organization UNESCO in 1996. Most of the area is protected because it encompasses national parks and nature reserves and is state owned, and, thus, managed by the County Administrative Board. Local stakeholders who want to participate and influence both the policy-making process as well as management activities have recently questioned this top- down arrangement. The issue is complex with stakeholders on different levels, overlapping jurisdictions and pending questions of indigenous rights. In this thesis, different problems are identified that have to be solved in order to promote and maintain a sustainable development of Laponia. The thesis aims to analyze if the adoption of multi-stakeholder co- management of Laponia is a possible solution to above-mentioned problems. A key question is how to understand the concept of co-management in this specific issue. Yet another question is, if and how, decision-making can be delegated to a local management organization. With the basis in common-pool resource theory, it is discussed whether or not, self-organization and self- governance of the area is a probable solution. It is concluded that one way of dealing with this problematic issue could be to create a co-management system for the Laponian area.
I december 1996 utsåg FN-organet Unesco Laponiaområdet i Norrbottens län till världsarv på grund av dess unika natur- och kulturvärden. Världsarvet Laponia är 9.400 km² stort och uppbyggt kring fyra nationalparker och två naturreservat. Det är också det empiriska fall som behandlas i denna uppsats. Den svenska naturvården har under lång tid varit formad med ett ovanifrånperspektiv, det vill säga den har varit hierarkiskt och statligt styrd. Under senare år har dock i flera delar av landet, allt tydligare krav ställts från lokal nivå, om delaktighet i förvaltningen av naturresurserna. Laponia är ett sådant område där de kommuner, inom vilket området ligger, och dess samebyar har uttryckt att de vill ha ett inflytande. Till en början verkade dessa intressenter ha likartade önskemål, men situationen förändrades genom att frågan om självbestämmande blev viktigare än frågan om lokal förvaltning. En av de grundläggande frågorna i denna uppsats är: Hur ska världsarvet Laponia kunna förvaltas hållbart och på ett sätt som accepteras av lokala, regionala och nationella intressen? Studien söker utifrån teoribildning inom CPR-området ("common-pool resource") identifiera de principiellt viktiga frågor som kräver lösning om Laponia ska få en långsiktigt hållbar förvaltning. Vilka är förutsättningarna för att någon grupp nyttjare ska organisera sig för att själv förvalta Laponia? I uppsatsen konstateras, med utgångspunkt från resursens och nyttjarnas attribut, att renskötarna är den enda grupp som verkar tänkbar i fråga om självorganisering och självförvaltning. Samisk självorganisering och självstyre möter dock på flera sätt problem att nå hållbar utveckling, framför allt på grund av dess svårighet att få legitimitet från övriga nyttjare. Om inte självförvaltning och självstyre är troligt, vilka är då alternativen? Ett tänkbart sådant är en förvaltningsform som under senare tid har fått ökad uppmärksamhet inom internationella organisationer, nämligen samförvaltning ("co-management"). I uppsatsen tydliggörs vad "co-management" innebär. För att kunna hantera samförvaltningsbegreppet och lösa problem i en komplicerad gemensam resurspool av Laponias karaktär, föreslås i uppsatsen att det skapas ett system för samförvaltning. Detta samförvaltningssystem kan innehålla olika institutionella arrangemang för förvaltning på olika nivåer - operativ nivå, kollektiv samt konstitutionell nivå.

Godkänd; 2002; 20070222 (ysko)

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Lima, Kelly Santana. "Estudo de nanocompósitos poli(metacrilato de hidroxietila) / laponita para revestimento de sementes". Pós-Graduação em Química, 2018. http://ri.ufs.br/jspui/handle/riufs/7941.

Texto completo

Resumen

Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
The search for more productive seeds and with better transport and storage conditions has developed the interest of companies and researchers. In this section, nanotechnology, in particular, polymer / clay nanocomposites has proved to be an excellent alternative. By means of these nanomaterials it is possible to transport assets that allow the plant to better growth, productivity and germination rates, through the transport of fertilizers, agrochemicals or even essential micronutrients. The aim of this work was to synthesize and study nanocomposites polymer / clay; poly (hydroxyethyl methacrylate), pure laponite (pHEMA / Lap) and enriched with manganese micronutrients (pHEMA / LapMn). These materials aim to provide water and concomitantly provide nutrients to the seeds. The best formulation for the samples, amounts of polymer and clay was studied, and from this the micronutrient was incorporated into the formulation. The materials were characterized by absorption spectroscopy in the infrared region (FTIR), X-ray diffractometry (XRD) and thermogravimetry (TG). In addition, the water uptake capacity of the samples was evaluated. TG results showed an increase in thermal stability due to the interaction of the polymer chain with the clay. The XRD study showed that pure Lap and Lap Mn presented similar basal spacing to that found in the literature and that the nanocomposite had an exfoliated structure of the materials. The observation of the degree of swelling of the samples showed that the nanocomposites showed a capacity of water absorption 10% higher than the pure hydrogel. The seed coating affected the germination rate of the seeds, showing an optimization of this process.
A busca por sementes mais produtivas e com melhores condições de transporte e armazenamento tem desenvolvido o interesse de empresas e pesquisadores. Nesta vertente, a nanotecnologia, em especial, os nanocompósitos polímero/argila tem se mostrado uma excelente alternativa. Por meio destes nanomateriais é possível transportar ativos que possibilitem a planta melhor crescimento, produtividade e taxas de germinação, por meio do transporte de fertilizantes, agroquímicos ou até micronutrientes essenciais. Neste trabalho buscou-se sintetizar e estudar nanocompósitos polímero/argila; poli(metacrilato de hidroxietila) (pHEMA), laponita pura (pHEMA/Lap) e enriquecida com micronutrientes manganês (pHEMA/LapMn). Estes materiais tem por objetivo fornecer água e concomitantemente fornecer nutrientes para as sementes. Estudou-se qual a melhor formulação para as amostras, quantidades de polímero e de argila e a partir desta incorporou-se o micronutriente a formulação. Os materiais foram caracterizados por espectroscopia de absorção na região do infravermelho (FTIR), difratometria de raios X (DRX) e termogravimetria (TG). Além disso, a capacidade de absorção de água das amostras foi avaliada. Houve aumento da estabilidade térmica decorrente da interação da cadeia polimérica com a argila. O estudo por DRX mostrou que a Lap pura e a Lap Mn apresentaram espaçamento basal similar ao encontrado na literatura e que o nanocompósito apresentou estrutura esfoliada dos materiais. A observação do grau de intumescimento das amostras mostrou que os nanocompósitos apresentaram uma capacidade de absorção de água 10% superior à do hidrogel puro. O revestimento das sementes prejudicou a taxa de germinação das mesmas mostrando-se necessário uma otimização deste processo.
São Cristóvão, SE

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Engberg, Anna. "Ecocertifications and quality labels : For whom and why, in the case of Laponia". Thesis, Uppsala universitet, Institutionen för kulturantropologi och etnologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324951.

Texto completo

Resumen

Abstract There are a lot of ecocertifications in Sweden for a variety of different categories; for example the Swan, which is a label for both hotels and products; KRAV, a label for farms and what farms pro- duce; Nature’s Best, a label for tourist adventures; the Sápmi Experience, a newly developed label for Sámi tourism, and The Green Key, a certification offered by Håll Sverige Rent for hostels, ho- tels, mountain cabins and camping grounds. Nature’s Best and the Green Key I have chosen as the focus for this paper, because they are the most relevant for my research. I will also give some atten- tion to Sápmi Experience because it is an interesting development in indigenous tourism. In the World Heritage area of Laponia, where I conducted fieldwork, there are several actors that have in- terest in the ecotourism business. Some of the actors are Sámi, the indigenous people whose princi- pal livelihood in Laponia is reindeer herding, and some are non-Sámi, like the Swedish Tourist As- sociation (STF) or other small-scale businesses. Some of them have the Nature’s Best label on their adventures, some do not. I find the Sámi culture and way of life very interesting, and since they are a big part of the World Heritage area Laponia landscape and an indigenous people, it was natural for me include them in this thesis. In this thesis I want to address the questions of for whom and why there are ecocertifications and quality markings. Are they for tourists, for traveling agencies, for people living in popular tourist areas, or perhaps for the environment?

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Green, Carina. "Managing Laponia : A World Heritage Site as Arena for Sami Ethno-Politics in Sweden". Doctoral thesis, Uppsala universitet, Institutionen för kulturantropologi och etnologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-110256.

Texto completo

Resumen

This study deals with the implications of implementing the World Heritage site of Laponia in northern Sweden. Laponia, consisting of previously well-known national parks such as Stora Sjöfallet and Sarek, obtained its World Heritage status in 1996. Both the biological and geological significance of the area and the local Sami reindeer herding culture are included in the justification for World Heritage status. This thesis explores how Laponia became an arena for the long-standing Sami ethno-political struggle for increased self-governance and autonomy. In many other parts of the world, various joint management schemes between indigenous groups and national environmental protection agencies are more and more common, but in Sweden no such agreements between the Swedish Environmental Protection Agency and the Sami community have been tested. The local Sami demanded to have a significant influence, not to say control, over the future management of Laponia. These were demands that were not initially acknowledged by the local and national authorities, and the negotiations about the management of Laponia continued over a period of ten years. This thesis shows how the local Sami initially were marginalized in the negotiations both because of their alleged “difference” and because of their alleged “similarity” to the majority population. By navigating through what can be described as “a politics of difference,” the Sami involved eventually succeeded in articulating their cultural and historical difference in such a way that they were perceived as different but equal in relation to the other actors. By describing the many twist and turns of the negotiations between the local Sami and the local authorities, this thesis shows how the involvement of international agencies and global protection aspirations, such as the World Heritage Convention, might establish a link between the local and international levels that to a certain extent bypasses the national level and empowers indigenous/local peoples and their ethno-political objectives. As such, this study demonstrates how local/indigenous peoples’ involvement in environmental protection work is above all a political issue that ultimately leads to a situation where their relation with the state authorities is reshaped and reassessed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Sumida, Roberto. "Modelo de acompanhamento de obras baseado em indicadores / Roberto Sumida ; orientador, Marco Antônio Barbosa Cândido ; co-orientador, Paulo Henrique Laporte Ambrozewicz". reponame:Biblioteca Digital de Teses e Dissertações da PUC_PR, 2005. http://www.biblioteca.pucpr.br/tede/tde_busca/arquivo.php?codArquivo=446.

Texto completo

Resumen

Dissertação (mestrado) - Pontifícia Universidade Católica do Paraná, Curitiba, 2005
Bibliografia: p. 119-129
Empresas de construção civil, principalmente as pequenas e médias, utilizam de forma precária as ferramentas gerenciais disponíveis no mercado. Sem informações adequadas o engenheiro de obra se vale de sua própria experiência para resolver os problemas ad

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Malásquez, Anchante María del Carmen. "Síntesis de nuevos hidrogeles a partir de n-isopropilacrilamida, macromonómeros de 2-oxazolinas y laponita". Master's thesis, Pontificia Universidad Católica del Perú, 2015. http://tesis.pucp.edu.pe/repositorio/handle/123456789/6684.

Texto completo

Resumen

Fueron elaborados nuevos hidrogeles mediante la copolimerización radicalar de la N-isopropilacrilamida (NiPAAm) y macromonómeros de 2-oxazolinas, en medio acuoso, en presencia de la arcilla Laponita XLS (Hectorita). Los macromonómeros utilizados fueron polímeros de 2-oxazolinas (éster- y metil-oxazolina), con un contenido de 25 y 50% molar de éster oxazolina con un grado de polimerización de 20 unidades y tuvieron un grupo vinilo en el extremo de la cadena polimérica. La síntesis de los hidrogeles fue realizada en agua utilizando el sistema de iniciación persulfato de amonio y TEMED. La gelación fue bastante rápida ocurriendo en apenas 5 minutos. En el sistema de polimerización, la Laponita XLS actuó como un elemento entrecruzador de las cadenas de PoliNiPAAm y macromonómeros que se generaron. De esta forma se obtuvieron hidrogeles con buena consistencia mecánica, transparencia y sensibilidad térmica y al pH. Posteriormente, los grupos éster contenidos en los hidrogeles fueron hidrolizados generándose así los grupos ácido carboxílico dentro de la estructura del hidrogel. Los hidrogeles fueron caracterizados por su rendimiento, su absorción de agua, estabilidad mecánica y su sensibilidad a la temperatura y al pH. Asimismo, fueron caracterizados estructuralmente vía resonancia magnética nuclear (RMN). Estos últimos análisis fueron realizados en el Instituto Leibniz de Investigaciones en Polímeros de Dresden, Alemania. En la presente tesis se utilizó la estrategia de elaborar primero el hidrogel conteniendo grupos protectores ésteres y después hidrolizar estos, in situ, en el hidrogel ya formado, para obtener los grupos ácido carboxílico dentro de su estructura y evitar así al máximo la formación de complejos entre los grupos ácido y la Laponita. Los hidrogeles mostraron sensibilidad a la temperatura debido a su contenido de segmentos de poli(N-isopropilacrilamida) y exhibieron sensibilidad al pH por su contenido de grupos ácido carboxílico. Asimismo, se indica que esta investigación fue presentada en The European Polymer Congress, llevado a cabo en Dresden, Alemania, del 21 al 26 de Junio de 2015. Título: "Synthesis of New Bi-sensitive Composite Laponite XLS-Hydrogel", Autores: J.C. Rueda, L. Lagos, M. Malasquez, H. Komber, S. Zschoche,B. Voit (Código del trabajo SOFT-L-27, página 236 del libro del congreso).
Tesis

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Rose, Jonas C. [Verfasser], Martin [Akademischer Betreuer] Möller y Laporte Laura [Akademischer Betreuer] De. "Development of in situ assembling microgel-in-hydrogel matrices for directed spinal cord regeneration / Jonas C. Rose ; Martin Möller, Laura De Laporte". Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1211487474/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Castro, Nava Arturo Verfasser], Laporte Laura [Akademischer Betreuer] De y Martin [Akademischer Betreuer] [Möller. "A light-modulated hydrogel system to analyze cell durotaxic behavior in a dynamic manner / Arturo Castro Nava ; Laura De Laporte, Martin Möller". Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1238603114/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Rose, Jonas C. Verfasser], Martin [Akademischer Betreuer] [Möller y Laporte Laura [Akademischer Betreuer] De. "Development of in situ assembling microgel-in-hydrogel matrices for directed spinal cord regeneration / Jonas C. Rose ; Martin Möller, Laura De Laporte". Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1211487474/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Wessling, Rebecka. ""Det är ett kulturlandskap och inte en vildmark" : En fallstudie över världsarvsområdet Laponia med en problematisering av dess styrning". Thesis, Linköpings universitet, Tema Miljöförändring, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166309.

Texto completo

Resumen

Sami rights have, since the end of the 19th century, been debated. During this time, Sámi rights have been disregarded and areas within Sápmi has been exploited both by the government and businesses. The consequences of this still affect the Sámi culture. Laponia was named a world heritage site in 1996, with the foundation of this being the natural and cultural values. Laponia is locally managed, with a Sámi majority. Conceptions about the Laponia management will therefore be explored and problematized in relation to the sámi influence. The used methods are a media analysis and interviews, method for analysis is content analysis for both. With the media analysis being the foundation for the interviews. The main themes were detected through the analyses; management, mining, and tourism. The analysis is anchored in a theoretical framework using the concepts of development, productivity, and passivity. The results from this essay indicate big differences in how people imagine the goals for managing Laponia. This affects the decision making and work related to the world heritage site. Some interests are aiming towards development and financial growth, while others want passivity and conservation. The mine in Kallak has created an extensive debate with major consequences, if established it would greatly affect the reindeer herding. There is also a discussion surrounding tourism. Although all interests agree that there are economic advantages in expanding this, they emphasize the great importance of it being sustainable and locally anchored. Knowledge is viewed differently based on who possesses it. There’s a degrading view on the Sámi knowledge and an ignorance regarding how this ought to be handled.

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Lapola, David Montenegro [Verfasser]. "Modeling the interplay between land use, bioenergy production and climate change / David Montenegro Lapola". Kassel : Universitätsbibliothek Kassel, 2010. http://d-nb.info/1006192484/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Lapolla, Alessio [Verfasser]. "Manifestations of Memory in Time- and Ensemble-Average Statistical Mechanics of Low-dimensional Physical Observables / Alessio Lapolla". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2021. http://d-nb.info/123575698X/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Moura, Paula Lorena Teixeira de. "Desenvolvimento e caracterização de filme bionanocompósito ativo incorporado com argila laponita e nanoemulsão de óleo essencial de carqueja (Baccharis trimera)". Universidade Federal de Viçosa, 2016. http://www.locus.ufv.br/handle/123456789/9887.

Texto completo

Resumen

Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-03-24T17:35:42Z No. of bitstreams: 1 texto compelto.pdf: 576732 bytes, checksum: 71f65814b643bd9956f27054a48ca690 (MD5)
Made available in DSpace on 2017-03-24T17:35:42Z (GMT). No. of bitstreams: 1 texto compelto.pdf: 576732 bytes, checksum: 71f65814b643bd9956f27054a48ca690 (MD5) Previous issue date: 2016-08-16
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Os plásticos derivados de petróleo representam um grande problema ambiental, devido à sua dificuldade de biodegradabilidade. Uma alternativa aos polímeros sintéticos é o uso de biopolímeros biodegradáveis, que são de fontes naturais, renováveis e de baixo custo. Os biopolímeros ainda têm seu uso limitado, devido às baixas propriedades mecânicas, térmicas e de barreira. O uso dos nanocompósitos pode melhorar as propriedades dos filmes biodegradáveis. Atualmente, há um grande interesse pelos consumidores por alimentos mais saudáveis, seguros e livres de conservantes sintéticos. As nanoemulsões de óleos essenciais vêm conferindo maiores propriedades antimicrobianas aos óleos essenciais, sendo utilizadas para a produção de embalagens ativas, com o objetivo de estender a vida de prateleira e inibir a multiplicação ou eliminar micro-organismos patogênicos e deteriorantes nos alimentos. Neste trabalho, foi desenvolvida uma embalagem ativa de hidroxipropilmetilcelulose, nanoemulsão de óleo essencial de carqueja (OE) e argila laponita (LAP). Na primeira etapa, foi produzida a nanoemulsão de óleo essencial de carqueja e caracterizada quanto à sua estabilidade físico-química. Avaliou-se o tamanho e a estabilidade da nanoemulsão durante sete dias de armazenamento, através das análises macroscópica, estresse térmico, diâmetro médio da gotícula, potencial zeta, índice de polidispersão e pH. A nanoemulsão apresentou-se estável sem a ocorrência de separação de fases, ou processos de instabilidade durante os sete dias de armazenamento. Na segunda etapa, avaliou-se a atividade antibacteriana do óleo essencial de carqueja sobre Staphylococcus aureus (ATCC 6538), Pseudomonas aeruginosa (ATCC 15442) e Escherichia coli (ATCC 11229), determinando sua concentração mínima inibitória. Posteriormente, os filmes foram desenvolvidos e avaliados por meio de análise da atividade antimicrobiana in vitro, espessura, propriedades mecânicas, microscopia eletrônica de varredura (MEV), perfilometria óptica, taxa de permeabilidade ao vapor d’água (TPVA), e análise termogravimétrica (TGA). O óleo essencial apresentou atividade antibacteriana sobre S. aureus e P. aeruginosa, com concentração mínima inibitória de 1% (m/v). Quando avaliada a atividade antimicrobiana in vitro dos filmes, observou-se halo de inibição apenas para Gram-positiva (S. aureus). A espessura dos filmes não foi influenciada pela adição de LAP e OE. Quanto às propriedades mecânicas dos filmes, a resistência à tração e módulo de elasticidade foram influenciados apenas pela adição de OE. Já o alongamento na ruptura não foi afetado pela adição de OE e LAP. As análises de microscopia eletrônica de varredura e perfilometria óptica revelaram a formação de gotículas de óleo essencial, fissuras e poros na superfície dos filmes. Os valores de TPVA diminuíram quando a concentração de OE e LAP foi aumentada. O OE e LAP não influenciaram na estabilidade térmica dos filmes. Resultados sugerem que o filme de hidroxipropilmetilcelulose incorporado com nanoemulsão de óleo essencial de carqueja e argila laponita pode ser utilizado como embalagem ativa para aumentar a segurança e vida de prateleira dos alimentos.
Petroleum-based plastics are a major environmental problem because of their difficult degradability. An alternative to synthetic polymers is the use of biodegradable biopolymers, which are from natural sources, renewable and low cost. Biopolymers still have limited use due to the low mechanical, thermal and barrier properties. The use of nanocomposites can improve the properties of biodegradable films. Currently, there is a big interest by consumers for healthy foods, safe and free of synthetic additives. Nanoemulsions of essential oils provide major antimicrobial properties to essential oils, being used for the production of active packaging, aiming to extend the shelf life and inhibit the multiplication or eliminate pathogenic and spoilage microorganisms in food. In this work an active packaging was developed incorporated with nanoemulsion of carqueja essential oil (OE) and laponite clay (LAP). In the first stage, the nanoemulsions of carqueja essential oil were characterized as to their physical and chemical stability. The size and stability of the nanoemulsion were evaluated during seven days of storage through macroscopic analysis, thermal stress, average droplet diameter, zeta potential, polydispersity index and pH. The nanoemulsion was stable without the occurrence of phase separation, or instability processes during the seven days of storage. In the second stage, the antibacterial activity of carqueja essential oil on Staphylococcus aureus (ATCC 6538), Pseudomonas aeruginosa (ATCC 15442) and Escherichia coli (ATCC 11229) was evaluated, determining its minimum inhibitory concentration. The films were developed and characterized by in vitro antimicrobial activity, thickness, mechanical properties, scanning electron microscopy (SEM), optical profilometry, water transmission rate (WVTR) and thermal gravimetric analysis (TGA). The carqueja essential oil showed antibacterial activity of against S. aureus and P. aeruginosa with minimal inhibitory concentration of 1% (w/v). When evaluated in vitro antimicrobial activity of the films was observed zones of inhibition only for Gram- positive (S. aureus). The thickness of the films was not influenced by the addition of LAP and OE. The mechanical properties were influenced by addition of OE. The SEM analysis and optical profilometry revealed the formation of essential oil droplets, fissures and pores on the surface of the films. The WVTR values decreased when increased the concentration of OE and LAP. The OE and LAP did not influence the thermal stability of the films. Results suggest that the hydroxypropyl methylcellulose film incorporated with nanoemulsions carqueja essential oil and laponite clay can be used as active packaging to increase the safety and shelf life of food.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Silva, Jhonatan Miguel. "Nanocompósito de NFC/Laponita® utilizado como suporte na produção de filmes luminescentes com complexo Eu (III) - ligante 2-thenoiltrifluoroacetona (TTA) /". Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153984.

Texto completo

Resumen

Submitted by JHONATAN MIGUEL SILVA (jhonatanmiguelsilva1@gmail.com) on 2018-05-12T23:55:51Z No. of bitstreams: 1 Jhonatan - Dissertação.pdf: 5809320 bytes, checksum: 8693f18360905b965eeef883e0a0adf8 (MD5)
Approved for entry into archive by Ana Carolina Gonçalves Bet null (abet@iq.unesp.br) on 2018-05-16T17:29:31Z (GMT) No. of bitstreams: 1 silva_jm_me_araiq_int.pdf: 5809406 bytes, checksum: 051f3e06b8131e1f18b54e3f2392672e (MD5)
Made available in DSpace on 2018-05-16T17:29:31Z (GMT). No. of bitstreams: 1 silva_jm_me_araiq_int.pdf: 5809406 bytes, checksum: 051f3e06b8131e1f18b54e3f2392672e (MD5) Previous issue date: 2018-04-23
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Nos dias de hoje, cada vez mais se faz necessário a substituição de produtos não-biodegradáveis derivados do petróleo por novos materiais que, além de não agredirem o ambiente, atendessem a crescente a demanda tecnológica. Visto isso, a celulose vem despertando um grande interesse na produção de novos materiais pois é uma matéria-prima abundante, de baixo custo, renovável e apresenta propriedades ecologicamente compatíveis como a biodegradabilidade e não-toxicidade. O uso de materiais argilosos na produção de compósitos com a finalidade de aprimorar as propriedades mecânicas, térmicas, de barreira de gás, resistências a chama, entre outras, tem sido bastante recorrente. Atualmente, a Laponita vem sendo utilizada na produção de compósitos apresenta propriedades relevantes para tal aplicação como a grande expansibilidade de suas lamelas e elevada capacidade de troca catiônica. Além disso, por apresentar propriedades distintas das argilas de ocorrência natural, como o pequeno tamanho de cristalito, a capacidade de formar géis e filmes translúcidos e o reduzido conteúdo de metais de transição, a Laponita também tem sido utilizada como matriz na produção de complexos luminescentes intercalados. No presente trabalho foram produzidos e caracterizados bio-nanocompósitos na forma de filmes utilizando nanofibras de celulose (NFC) e Laponita (Lap), com diferentes proporções de argila em relação à massa total do filme (denominados de NFC, NFC/Lap X%, sendo X = 10, 20, 30, 40 e 50%) no qual, pelas imagens de microscopia eletronica de varredura (MEV) observou-se que houve a dispersão da Laponita e que a presença da argila na amostra promoveu um efeito de agregação das nanofibras de celulose. Já nos testes de termogravimetria (TG) foi possível apurar que a presença da Laponita aumentou a estabiliadade térmica do nanocompósitos, uma vez que com o aumento da argila na amostra houve um acrescimo na temperatura de degradação dos filmes. Por fim, por ser bastante hidrofílica, o aumento da quantidade de Laponita na amostra ocasionou em um aumento na permeabilidade ao vapor de água pelos filmes. Produziu-se também filmes com NFC e um híbrido luminescente da Laponita intercalada com complexos e Eu(III)-ligante TTA com diferentes proporções de argila em relação à massa total do filme (denominados de NFC, NFC/Lap@Eu3+(TTA)n X%, sendo X = 10, 20, 30, 40 e 50%) os quais, observando as imagens de MEV, possuem agregados de híbridos no emaranhado de fibras de celulose, indicando que tais compósitos apresentam uma composição heterogênea. Já nos testes de termogravimetria, nota-se que a presença do híbrido aumentou a estabilidade térmica dos filmes pelo deslocamento da temperatura de degradação para maiores comparado ao NFC isolado. Por fim, através dos testes de fotoluminescência, foi possível concluir que os filmes apresentam propriedades luminescentes, já que apresentam transições características do európio (5D0->7Fj, j = 0,1 ,2 ,3 e 4). Os diferentes materiais obtidos apresentaram propriedades distintas com possíveis aplicações como: filmes de separação ou adsorventes seletivos, sensores luminescentes e até mesmo na produção de materiais retardantes de chama.
10 ABSTRACT Nowadays, it is increasingly necessary to replace non - biodegradable petroleum products with new materials that, in addition to not harming the environment, surpasses the increasing technological demand. Because of this, celul l ose has been of great interest in the pr oduction of new materials since it is an abundant raw material, low cost, renewable and presents ecologically compatible properties such as biodegradability and non - toxicity. The use of clay materials in the production of composites in order to improve the mechanical properties, thermal, gas barrier, flame resistance, among others, has been very recurrent. Currently, Laponite has been used in the production of composites presents properties relevant to such application as the great expansibility of its la ye rs and high cation exchange capacity. In addition, because it presents distinct properties of naturally occurring clays, such as the small size of crystallite, the ability to form gels and translucent films and the reduced content of transition metals, Lap onite has also been used as a matrix in the production of luminescent complexes inter layered . In the present work, nanocomposites in the form of films using cellulose nanofibres (C NF ) and Laponite (Lap), with different proportions of clay in relation to th e total mass of the film (denominated C NF , CNF /Lap X%, being X =10, 20, 30, 40 and 50%) were produced and characterized . The scanning electron microscopy (SEM) images showed Laponite a dispersion and that the presence of clay in the sample promoted an aggregation effect of the nanofibres of cellulose. In the tests of thermogravimetry (TG) it was possible to verify that the presence of Laponite increased the thermal stability of the nanocomposites, since with the increase of the clay in the sample there was an increase in the degradation temperature of the films. Finally, because it was very hydrophilic, the increase in the amount of Laponite in the sample caused an increase in the water vapor permeability of the films. C NF films and a Laponite luminescen t hybrid intercala yered with complexes and Eu (III) - li gand TTA were also produced with different clay proportions relative to the total film mass (termed C NF , C NF / L ap@ Eu 3+ (TTA) n X % , with X = 10, 20, 30, 40 and 50%), which, according to SEM images, have h ybrid aggregates in the cellulose fiber, indicating that these composites have a heterogeneous composition. In the tests of thermogravimetry , the presence of the hybrid increased the thermal stability of the films by displacing the temperature of degradati on to larger ones compared to the NFC alone. Finally, through the photoluminescence tests, it was possible to conclude that the films have luminescent properties, since they present characteristic transitions of europium ( 5 D 0 → 7 F j , j= 0, 1, 2, 3 and 4). The different materials obtained presented different properties with possible applications such as separation films or selective adsorbents, luminescent sensors and even in the production of flame retardant materials

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Revelin, Florence. "Montagnes à vivre, à voir et à préserver : dynamiques du tourisme et sites européens du Patrimoine mondial (Laponia et Pyrenées-Mont Perdu)". Paris, Muséum national d'histoire naturelle, 2013. http://www.theses.fr/2013MNHN0018.

Texto completo

Resumen

L’inscription d’un site sur la Liste du patrimoine mondial sur la base de critères mixtes combine des objectifs de conservation et de valorsation de systèmes naturels et culturels susceptibles de transformer le rapport au lieu ou le lieu labellisé lui-même. La thèse aborde ces dynamiques à travers le prisme du tourisme, grâce à l’étude comparative de deux sites européens du Patrimoine mondial de l’Unesco en régions de montagnes : Laponia (au nord de la Suède), territoire ancestral des Samis qui vivent de l’élevage transhumant des rennes, et Pyrénées‐Mont Perdu (site transfrontalier entre la France et l’Espagne), façonné par l’agro-‐pastoralisme ovin et bovin. Grâce à une approche ethnographique et comparative, j’ai analysé les pratiques, les savoirs et savoir-faire, les représentations et les imaginaires des usagers des sites (acteurs locaux du tourisme, éleveurs, agents des parcs nationaux, acteurs politiques et touristes). Les résultats montrent que le classement de ces régions par l’Unesco s’insère dans le cadre d’un processus dynamique qui dépasse largement le seul moment de l’inscription, et met les acteurs locaux en mouvement autour des enjeux portés par ce label. Le tourisme y occupe une place particulière en ce qu’il interagit avec toutes les facettes du développement local, repose sur un processus historique qui l’a façonné au cours du temps et fait l’objet de diverses projections. La thèse démontre néanmoins que, si le développement touristique constitue une attente fondamentale de certains acteurs locaux lors du processus de labellisation, la labellisation des sites n’affecte qu'indirectement la manière dont ils s’approprient et développent le tourisme sur leurs territoires. L’analyse de ce processus révèle par ailleurs le caractère déterminant de la constitution des éleveurs en force politique : les inflexions observées sur le territoire lapon sont le résultat d'un investissement de la gouvernance du site par les Samis dans le contexte d'une lutte pour la reconnaissance de leurs droits et de leur culture, perspective qu'on ne retrouve pas sur le territoire pyrénéen
The establishment of a World Heritage Site based on mixed criteria combines objectives relating both to the preservation and the promotion of natural and cultural systems. They may profoundly transform both the relationships to these places and the places themselves. This thesis addresses these dynamics through the prism of tourism. It is based on a comparative study of tourism in two European UNESCO World Heritage Sites situated in mountainous regions : Laponia (in northern Sweden), part of the ancestral land of the Sami people who practice transhumant reindeer husbandry ; and Pyrénées -Mont Perdu (a transboundary area between France and Spain), shaped by ovine and bovine agro-pastoralism. This research is based on a comparative ethnographic approach that focuses on the practices, knowledge, know-how, representations and imaginaries of the diverse users of the sites (local tourism professionals, herders, national park agents, politicians and tourists). The analysis shows that the labelling of these regions by UNESCO took place in the context of a broader dynamic process concerning much more than hust the moment of inscription on the World Heritage List, which mobilised local actors around the many diverse stakes raised by and related to the label. Tourism has a specific place in this dynamic as it intersects with all features of local development and is subject to a diversity of projected views of and visions for the region. This thesis demonstrates that if the development of tourism is a fundamental expectation of the labelling process for some local actors, the sites’labelling has in fact only an indirect effect on how local people adapt to and develop tourism within their territories. The analysis of this process underscores the determining character of the herders’formation into a political body : the observed changes on the Sami territory are the result of the Sami’s commitment to involvement in the site’s governance, itself linked to the wider context of their long struggle to get their rights and culture recognised. This dynamic is not found in the Pyrenean case study

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Ferreira, Junior Carlos Roberto. "Desenvolvimento e aplicação de diferentes nanocompósitos híbridos em sistemas de adsorção e dessorção de pesticida paraquat /". Ilha Solteira, 2019. http://hdl.handle.net/11449/191425.

Texto completo

Resumen

Orientador: Fauze Ahmad Aouada
Resumo: Neste trabalho, primeiramente foram desenvolvidos hidrogéis nanocompósitos baseados em poli(ácido metacrílico) (PMAA) e nanoargilas cloisita-Na+, laponitas RD (Lpt RD) e RDS (Lpt RDS) por meio de polimerização via radical livre. A formação do nanocompósito e o grau de dispersão das nanoargilas junto a matriz polimérica foram investigados por análise de FTIR, MEV e DRX. A presença do argilomineral se apresentou um fator importante no que diz respeito ao aumento da capacidade de absorver água (Q) dos hidrogéis, atingindo um máximo em 5% de incorporação das Lpts no PMAA, além de uma melhora na estabilidade térmica dos nanocompósitos comprovada por TG. Assim como as nanocargas, o pH do meio também é um fator determinante para o controle do intumescimento. Pois, os grupos carboxílicos do PMAA sofrem ionização dependendo do pH da solução, aumentando assim o intumescimento do hidrogel. Segundo, foi realizado um estudo relativo à eficiência da adsorção pelos nanocompósitos (nanoargilas Lpt RD, Lpt RDS e cloisita-Na+) do herbicida paraquat (PQ) e sua posterior liberação em solução aquosa. Mais uma vez a presença do argilomineral se mostrou relevante, aumentando para 100% de eficiência no carregamento para nanocompósitos constituídos por 20% de nanoargilas. As adsorções em todas as formulações dos nanocompósitos se ajustaram à isoterma de Langmuir. Enquanto o modelo de isoterma de Freundlich foi o melhor modelo para a matriz sem nanoargila. Todas as isotermas apresentaram perfil de ads... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: In this work, initially, nanocomposite hydrogels based on poly(methacrylic acid) (PMAA), closite-Na+, laponite RD (Lpt RD) and laponite RDS (Lpt RDS) nanoclays were synthesized from free radical polymerization. The formation of the nanocomposite and the degree of dispersion of the nanoclays into polymeric matrices were investigated by FTIR, SEM, and XRD techniques. The presence of the clay mineral was a significant factor because it increased the capacity of water absorption (SD) of the hydrogels, reaching a maximum of 5% of Lpts into PMAA. Besides, the thermal stability of the nanocomposites, confirmed by TG, was increased by clay presence. As the nanofillers, the pH of the environment is also a determinant factor for the control of swelling. Because the carboxyl groups of the PMAA undergo ionization depending on the pH of the solution, increasing the swelling of the hydrogel. Then, a study was carried out on the adsorption efficiency of the herbicide paraquat (PQ) using hydrogel nanocomposites (with Lpt RD, Lpt RDS, and cloisite-Na+ nanoclays) as adsorbent materials. After, its release properties were investigated in aqueous solution. The presence of nanoclay was again relevant, increasing to 100% its loading efficiency for nanocomposites made up of 20% nanoclays. Adsorption in all nanocomposite formulations fitted the Langmuir isotherm. Already, the paraquat sorption results followed the Freundlich isotherm model. All isotherms had favorable adsorption profiles, and it pre... (Complete abstract click electronic access below)
Doutor

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Laporte, Anna [Verfasser], Sigurd [Akademischer Betreuer] Lenzen, Fritz [Akademischer Betreuer] Scholz, Matthias [Akademischer Betreuer] Elsner, Uwe [Akademischer Betreuer] Lendeckel, Fritz [Gutachter] Scholz, Sigurd [Gutachter] Lenzen, Dimitrios [Gutachter] Tsikas y Ingo [Gutachter] Rustenbeck. "Site-specific intracellular generation and detection of hydrogen peroxide and protection against oxidative stress in insulin-producing cells / Anna Laporte ; Gutachter: Fritz Scholz, Sigurd Lenzen, Dimitrios Tsikas, Ingo Rustenbeck ; Sigurd Lenzen, Fritz Scholz, Matthias Elsner, Uwe Lendeckel". Greifswald : Universität Greifswald, 2019. http://d-nb.info/1196293244/34.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Laporte, Anna [Verfasser], Sigurd [Akademischer Betreuer] Lenzen, Fritz [Akademischer Betreuer] Scholz, Matthias Akademischer Betreuer] Elsner, Uwe [Akademischer Betreuer] Lendeckel, Fritz [Gutachter] Scholz, Sigurd [Gutachter] Lenzen, Dimitrios [Gutachter] [Tsikas y Ingo [Gutachter] Rustenbeck. "Site-specific intracellular generation and detection of hydrogen peroxide and protection against oxidative stress in insulin-producing cells / Anna Laporte ; Gutachter: Fritz Scholz, Sigurd Lenzen, Dimitrios Tsikas, Ingo Rustenbeck ; Sigurd Lenzen, Fritz Scholz, Matthias Elsner, Uwe Lendeckel". Greifswald : Universität Greifswald, 2019. http://nbn-resolving.de/urn:nbn:de:gbv:9-opus-31847.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Santana, Faria Natália. "Mediated Justice : Mapping news media narratives about indigenous peoples’ rights and the mining conflicts in Renca (Brazil) and Gállok (Sweden)". Thesis, Stockholms universitet, JMK, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-159676.

Texto completo

Resumen

Conflicts between the mining industry and traditional communities have been challenging indigenous peoples’ rights and endangering the environment around the world. The purpose of this study is to gain a broad perspective on the role of media representations in framing (or misframing) justice (Fraser 2009) and in reflecting (or not) media responsibility (Silverstone 2017) when reporting such events. Although recent studies have analysed news media coverage of environmental conflicts from a similar theoretical approach, few studies have addressed this inquiry through narrative analysis. Particularly, considering cases from both developed and developing countries, different media ecologies (mainstream and alternative), and scales of production and distribution (national and international). This is the gap that motivates this study. The material consists of 54 articles from diverse new media sources that have reported on two contemporary mining conflicts: the Renca mining reserve in Brazil, and the Gállok/Kallak iron mine in Sweden. The analysis focuses on how the narrator conducts the stories by mapping and comparing the structural and discursive patterns found in the material. The findings show that, in both cases (Brazil and Sweden), the majority of narratives are grounded in Western-centric perspectives that tend to misframe justice. In contrast, the results suggest that fairer and more responsible narratives are the ones told from an absolute local (Cavarero 2012) perspective.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Lay, Suzanne. "Prélude, fugue et variation : présences méloformes de J.S. Bach dans le roman du XXe siècle à nos jours". Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0001.

Texto completo

Resumen

Les Faux-Monnayeurs et Contrepoint prennent tous deux pour modèle l’écriture fuguée et pour référence la figure du compositeur le plus cité en la matière : Johann Sebastian Bach. « Ce que je voudrais faire, comprenez-moi, c’est quelque chose qui serait comme L’Art de la Fugue », affirme Édouard chez André Gide, tandis que le Philip Quarles d’Aldous Huxley plaide pour une «musicalisation du roman» inspirée de l’écriture contrapuntique. Jeu musical, le roman fugué prend, chez les deux auteurs, la forme d’un contrat. Ce contrat connaîtra un retentissement certain chez les auteurs du Nouveau Roman du Gruppe 47 et au-delà : Roger Laporte, Robert Pinget, ainsi que Paul Celan, Friedrich Dürrenmatt et Wolfgang Hildesheimer, et plus tardivement Richard Powers, Gabriel Josipovici et Milan Kundera s’inspireront de la fugue mais aussi de la passacaille et de la variation pour structurer leurs récits. S’érigera ensuite sur l’œuvre de Bach et plus particulièrement sur les Variations Goldberg un nouveau pattern romanesque : le roman de l’interprète. Celui-ci interroge, chez Nancy Huston, Anna Enquist, Yves-Michel Ergal, mais également Dominique Autié, Robert Schneider, Thomas Bernhard et William Coles la figure de l’interprète et s’approprie via le medium du texte et le geste de l’écriture les caractéristiques de l’interprétation musicale. A travers l’étude de ces nombreux romans, nous entendons rendre compte des enjeux soulevés par l’appropriation formelle de l’œuvre de J.S. Bach, du point de vue de la forme même comme du point de vue des propos que cette forme a pu engendrer
Les Faux-Monnayeurs and Point Counter Point both use the fugal writing style as a model, and for reference the figure of the most quoted composer in the field: Johann Sebastian Bach. "What I would like to do, understand me, is something like The Art of Fugue," says Edouard Gide, while Philip Quarles of Aldous Huxley argues for a "musicalization of the novel" inspired by contrapuntal writing. In the shape of a musical game, the fugue novel adopts in both authors, the shape of a contract. This contract will impact the writers of the New Roman of Gruppe 47 and beyond: Roger Laporte, Robert Pinget, as well as Paul Celan, Friedrich Dürrenmatt and Wolfgang Hildesheimer, and later Richard Powers, Gabriel Josipovici and Milan Kundera. will use the shape of fugue, but also the shape of the passacaglia and of variation to structure their stories. Bach's work, and more particularly the Goldberg Variations, is then set off with a new novelistic pattern: the performer's novel. This one questions, through Nancy Huston, Anna Enquist, Yves- Michel Ergal, but also Dominique Autié, Robert Schneider, Thomas Bernhard and William Coles, the figure of the interpreter and appropriates, via the medium of the text and the gesture of writing, the characteristics of musical interpretation. Through the study of these many novels, we intend to report on the issues raised by the formal appropriation of the work of JS Bach, from the point of view of the form itself as well as from the point of view of the remarks that this form was able to engender

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Chaparro, Thaíssa de Camargo. "Síntese de nanocompósitos com propriedades anisotrópicas via polimerização radicalar controlada em emulsão". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/97/97134/tde-13092016-110713/.

Texto completo

Resumen

Este trabalho de tese tem como objetivo a preparação de látices nanocompósitos à base da argila Laponita RD em emulsão aquosa, via polimerização radicalar controlada por transferência de cadeia via adição-fragmentação reversível (RAFT). A Laponita foi escolhida como carga inorgânica devido principalmente à forma anisotrópica de suas lamelas, o que permite a elaboração de filmes nanoestruturados, mas também por suas propriedades térmicas e mecânicas, por sua alta pureza química e pela distribuição uniforme, em termos de tamanho, de suas partículas. Inicialmente, polímeros hidrofílicos (macroRAFT) à base de poli(etileno glicol) (PEG), de ácido acrílico (AA) ou de metacrilato de N,N-dimetilaminoetila (DMAEMA) que contêm unidades hidrofóbicas de acrilato de nbutila (ABu) (em alguns casos) e um grupo tritiocarbonílico terminal foram sintetizados. Em seguida, a interação entre os macroagentes de controle (macroRAFTs) e a argila foi estudada através de isotermas de adsorção. Atuando como agentes de acoplamento e estabilizantes, esses macroRAFTs foram então utilizados na copolimerização em emulsão do (met)acrilato de metila e do ABu em processo semicontínuo na presença da argila Laponita. Partículas de látex híbrido de diferentes morfologias foram obtidas e os resultados foram correlacionados à natureza e à concentração dos macroRAFTs, ao pH da dispersão macroRAFT/Laponita, à temperatura de transição vítrea do copolímero final (função da composição da mistura de monômeros hidrofóbicos) e às condições de polimerização. As análises de cryo-TEM indicam a formação de lamelas de Laponita decoradas com partículas de polímero (várias partículas de látex localizadas na superfície das lamelas), de partículas do tipo dumbbell, janus, blindadas (partículas de látex decoradas com lamelas de argila em sua superfície) ou ainda de partículas multiencapsuladas (diversas lamelas encapsuladas dentro de uma única partícula de látex). As propriedades mecânicas dos filmes de polímero/Laponita foram estudadas por análise dinâmico-mecânica e correlacionadas à morfologia das partículas e à microestrutura dos filmes.
The aim of this work is to prepare Laponite RD-based nanocomposite latexes by aqueous emulsion polymerization, using the reversible addition-fragmentation chain transfer (RAFT) polymerization. Laponite platelets were selected as the inorganic filler due, especially, to their anisotropic shape, which allows the production of nanostructured films, but also for their thermal and mechanical properties, their high chemical purity and the uniform dispersity of the platelets. Hydrophilic polymers (macroRAFT) composed of poly(ethylene glycol) (PEG), acrylic acid (AA) or N,N-dimethylaminoethyl methacrylate (DMAEMA) and comprising hydrophobic n-butyl acrylate (BA) units (in some cases) and trithiocarbonate terminal group were initially synthesized. Then, the interaction between the macroRAFTs and the clay was studied through the plot of adsorption isotherms. By acting as coupling agents and stabilizers, the macroRAFT agents were used in the emulsion copolymerization of methyl (meth)acrylate and BA by semi-continuous process in the presence of the clay. Hybrid latex particles with different morphologies were obtained and the results were associated to the nature and concentration of the RAFT (co)polymers, to the pH of the macroRAFT/Laponite dispersion, the glass transition temperature of the final copolymer (function of the composition of the hydrophobic monomers mixture) and to the polymerization conditions. The cryo-TEM images indicate the formation of polymerdecorated Laponite platelets (several latex particles located at the surface of the platelets), dumbbell-like, janus, Laponite-decorated (armored) latex particles, and multiple encapsulated particles (several platelets inside each latex particle). The mechanical properties of polymer/Laponite films were studied by dynamic mechanical analysis and correlated with the particles morphology and the films microstructure.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Therrien, Marc y Marc Therrien. "Le calcul des coûts de la congestion routière causée par les ponts reliant Québec et Lévis". Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/28300.

Texto completo

Resumen

La congestion routière est un problème qui fait supporter de nombreux coûts à la société, qu’il s’agisse de perte de temps, d’une consommation accrue de carburant ou d’une pollution atmosphérique supplémentaire. Dans la région métropolitaine de Québec, le problème est particulièrement présent aux alentours des ponts de Québec et Pierre-Laporte. Ce mémoire propose de calculer trois types de coût de la congestion routière autour des ponts en utilisant des données GPS, soit le coût total, le coût externe et la perte sociale de la congestion. Nos résultats semblent indiquer que la congestion fait supporter un coût total à la société de plus de 40 millions $ par année dans la zone autour des ponts, en estimant ce coût selon deux approches différentes. Le coût externe de la congestion dans la zone est estimé à 21,7 millions $ et la perte sociale entraînée par cette congestion à 5,5 millions $ annuellement. Les coûts de la congestion estimés sont nettement supérieurs à ceux de l’étude parue en juin 2017 de Raymond Chabot Grant Thornton qui estimait le coût total pour les tronçons routiers principaux dans une zone similaire autour des ponts à 15,8 millions $.
La congestion routière est un problème qui fait supporter de nombreux coûts à la société, qu’il s’agisse de perte de temps, d’une consommation accrue de carburant ou d’une pollution atmosphérique supplémentaire. Dans la région métropolitaine de Québec, le problème est particulièrement présent aux alentours des ponts de Québec et Pierre-Laporte. Ce mémoire propose de calculer trois types de coût de la congestion routière autour des ponts en utilisant des données GPS, soit le coût total, le coût externe et la perte sociale de la congestion. Nos résultats semblent indiquer que la congestion fait supporter un coût total à la société de plus de 40 millions $ par année dans la zone autour des ponts, en estimant ce coût selon deux approches différentes. Le coût externe de la congestion dans la zone est estimé à 21,7 millions $ et la perte sociale entraînée par cette congestion à 5,5 millions $ annuellement. Les coûts de la congestion estimés sont nettement supérieurs à ceux de l’étude parue en juin 2017 de Raymond Chabot Grant Thornton qui estimait le coût total pour les tronçons routiers principaux dans une zone similaire autour des ponts à 15,8 millions $.
Road congestion is a problem that burdens society with many costs, whether it is loss of time, an increased consumption of fuel or supplementary atmospheric pollution. In the metropolitan region of Quebec, the problem is particularly present in the vicinity of Quebec and Pierre-Laporte bridges. This master’s thesis proposes to calculate three types of cost of road congestion around the bridges using GPS data : the total cost, the external cost and the social loss of congestion. Our results seem to indicate that the congestion imposes a total cost to the society over $40 million per year in the area around the bridges, estimating this cost with two different approaches. The external cost of congestion in the area is estimated to $21.7 million and the social loss incurred by this congestion to $5.5 million annually. The estimates of the cost of congestion are considerably higher than those of the study published in June 2017 by Raymond Chabot Grant Thornton that estimated the total cost for the main roads within a similar zone around the bridges of $15.8 million per year.
Road congestion is a problem that burdens society with many costs, whether it is loss of time, an increased consumption of fuel or supplementary atmospheric pollution. In the metropolitan region of Quebec, the problem is particularly present in the vicinity of Quebec and Pierre-Laporte bridges. This master’s thesis proposes to calculate three types of cost of road congestion around the bridges using GPS data : the total cost, the external cost and the social loss of congestion. Our results seem to indicate that the congestion imposes a total cost to the society over $40 million per year in the area around the bridges, estimating this cost with two different approaches. The external cost of congestion in the area is estimated to $21.7 million and the social loss incurred by this congestion to $5.5 million annually. The estimates of the cost of congestion are considerably higher than those of the study published in June 2017 by Raymond Chabot Grant Thornton that estimated the total cost for the main roads within a similar zone around the bridges of $15.8 million per year.

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

De, Camargo Chaparro Thaissa. "Synthesis of nanocomposites with anisotropic properties by controlled radical emulsion polymerization Lorena". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1045/document.

Texto completo

Resumen

L'objectif de ce travail de thèse est de préparer des latex nanocomposites à base d’argile, la Laponite RD, en émulsion aqueuse, à l'aide de la polymérisation radicalaire contrôlée par transfert de chaîne réversible par addition-fragmentation (RAFT). Les plaquettes de Laponite ont été choisies comme charge inorganique surtout pour leur anisotropie de forme, ce qui pourrait permettre l’elaboration de films nanostructurés, mais aussi pour leurs propriétés thermiques et mécaniques, leur pureté chimique élevée et la distribution uniforme en taille des plaquettes. Des polymères hydrophiles (macroRAFT) à base de polyéthylène glycol (PEG), d’acide acrylique (AA) ou de méthacrylate de N,N- diméthylaminoéthyle (DMAEMA) et comportant des unités hydrophobes d’acrylate de n-butyle (ABu) (dans certains cas) et un groupe trithiocarbonate terminal, ont été tout d'abord synthétisés. Ensuite, l'interaction entre les macroRAFTs et l’argile a été étudiée à travers le tracé des isothermes d'adsorption. En agissant comme des agents de couplage et des stabilisants, ces macroRAFTs ont eté utilisés dans la copolymérisation en émulsion du (méth)acrylate de méthyle et de l’ABu en mode semi-continu en presence d’argile. Des particules de latex hybrides de différentes morphologies ont été obtenues et les morphologies ont été reliées à la nature et à la concentration de l’agent macroRAFT, au pH de la dispersion macroRAFT/Laponite, à la température de transition vitreuse du copolymère final (fonction de la composition du mélange de monomères hydrophobes) et aux conditions de polymérisation. Les analyses par cryo-MET indiquent des plaquettes de Laponite décorées par des particules de polymère (plusieurs particules de latex en surface des plaquettes d'argile), des particules ‘haltère’, janus, ‘carapace’ (particules de latex décorées en surface par les plaquettes de Laponite) ou encore des particules multi-encapsulées (plusieurs plaquettes encapsulées dans chaque particule de latex). Les propriétés mécaniques des films de polymère/Laponite ont été étudiées par spectrométrie mécanique dynamique et corrélées à la morphologie des particules et à la microstructure des films
The aim of this work is to prepare Laponite RD-based nanocomposite latexes by aqueous emulsion polymerization, using the reversible addition-fragmentation chain transfer (RAFT) polymerization. Laponite platelets were selected as the inorganic filler due, especially, to their anisotropic shape, which allows the production of nanostructured films, but also for their thermal and mechanical properties, their high chemical purity and the uniform dispersity of the platelets. Hydrophilic polymers (macroRAFT) composed of poly(ethylene glycol) (PEG), acrylic acid (AA) or N,N-dimethylaminoethyl methacrylate (DMAEMA) and comprising hydrophobic n-butyl acrylate (BA) units (in some cases) and trithiocarbonate terminal group were initially synthesized. Then, the interaction between the macroRAFTs and the clay was studied through the plot of adsorption isotherms. By acting as coupling agents and stabilizers, the macroRAFT agents were used in the emulsion copolymerization of methyl (meth)acrylate and BA by semi-continuous process in the presence of the clay. Hybrid latex particles with different morphologies were obtained and the results were associated to the nature and concentration of the RAFT (co)polymers, to the pH of the macroRAFT/Laponite dispersion, the glass transition temperature of the final copolymer (function of the composition of the hydrophobic monomers mixture) and to the polymerization conditions. The cryo-TEM images indicate the formation of polymerdecorated Laponite platelets (several latex particles located at the surface of the platelets), dumbbell-like, janus, Laponite-decorated (armored) latex particles, and multiple encapsulated particles (several platelets inside each latex particle). The mechanical properties of polymer/Laponite films were studied by dynamic mechanical analysis and correlated with the particles morphology and the films microstructure
Este trabalho de tese tem como objetivo a preparação de látices nanocompósitos à base da argila Laponita RD em emulsão aquosa, via polimerização radicalar controlada por transferência de cadeia via adição-fragmentação reversível (RAFT). A Laponita foi escolhida como carga inorgânica devido principalmente à forma anisotrópica de suas lamelas, o que permite a elaboração de filmes nanoestruturados, mas também por suas propriedades térmicas e mecânicas, por sua alta pureza química e pela distribuição uniforme, em termos de tamanho, de suas partículas. Inicialmente, polímeros hidrofílicos (macroRAFT) à base de poli(etileno glicol) (PEG), de ácido acrílico (AA) ou de metacrilato de N,N-dimetilaminoetila (DMAEMA) que contêm unidades hidrofóbicas de acrilato de nbutila (ABu) (em alguns casos) e um grupo tritiocarbonílico terminal foram sintetizados. Em seguida, a interação entre os macroagentes de controle (macroRAFTs) e a argila foi estudada através de isotermas de adsorção. Atuando como agentes de acoplamento e estabilizantes, esses macroRAFTs foram então utilizados na copolimerização em emulsão do (met)acrilato de metila e do ABu em processo semicontínuo na presença da argila Laponita. Partículas de látex híbrido de diferentes morfologias foram obtidas e os resultados foram correlacionados à natureza e à concentração dos macroRAFTs, ao pH da dispersão macroRAFT/Laponita, à temperatura de transição vítrea do copolímero final (função da composição da mistura de monômeros hidrofóbicos) e às condições de polimerização. As análises de cryo-TEM indicam a formação de lamelas de Laponita decoradas com partículas de polímero (várias partículas de látex localizadas na superfície das lamelas), de partículas do tipo dumbbell, janus, blindadas (partículas de látex decoradas com lamelas de argila em sua superfície) ou ainda de partículas multiencapsuladas (diversas lamelas encapsuladas dentro de uma única partícula de látex). As propriedades mecânicas dos filmes de polímero/Laponita foram estudadas por análise dinâmico-mecânica e correlacionadas à morfologia das partículas e à microestrutura dos filmes

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

MARCHI, FRANCESCA. "Educazione di comunità e sistema educativo locale.Percorsi storico-teorici e buone prassi". Doctoral thesis, 2005. http://hdl.handle.net/2158/662962.

Texto completo

Resumen

Il lavoro si sviluppa dalla ricostruzione storico-teorica dell'evoluzione dell'educazione di comunità, e in questo quadro vengono evidenziate le declinazioni che in Italia ha assunto tale concetto attraverso la riflessione pedagogica e le pratiche educative. In seguito la tesi si articola anche attorno al disegno politico-istituzionale mettendo in luce gli elementi basilari della costruzione del sistema educativo locale, nelle politiche di decentramento, nelle componenti della partecipazione e dell'integrazione per lo sviluppo locale di una comunità territoriale. Le ricadute operative del quadro teorico vengono studiate a partire dall'analisi del Modello Toscano del Sistema Formativo Integrato fino ad arrivare ad una dimensione micro di studio e osservazione in un'area della regione Toscana, il Mugello. Il lavoro arricchisce il contributo con un'esperienza di sviluppo delll'educazione di comunità in Nicaragua che ha permesso di sperimentare la relazione tra i contesti e gli interventi al fine di definire la teoria locale dell'educazione.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Forsgren, Adrian. "Sámi Influence in Decision-Making Processes : Consultation, Consent or Somewhere In-between?" Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384728.

Texto completo

Resumen

International human rights committees and special rapporteurs on the situation for indigenous peoples have criticised Sweden for the domestic treatment of Sámi people and for not fully complying with indigenous rights on participation and consultation under international law. Participatory rights and consultation duties for indigenous peoples are important as they function as means of ensuring indigenous influence in decision making, giving effect to their substantive rights to land resources and culture. Swedish law acknowledges rights for Sámi people to be consulted in decision making. However, these peoples still do not have effective influence on issues that affect them in their role as indigenous peoples. As the extraction of natural resources and industrial and other development projects continues, the protection of indigenous Sámi rights in Swedish law need to guarantee that Sámi people have enough influence over land issues and in decision-making processes on matters that concern them. With their traditional knowledge, indigenous peoples may have an important role in environmental management and in efforts on climate change adaptation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Tesis sobre el tema "Laporta"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros