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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Modelo experimental de influência dos vasa vasorum na estrutura da parede de aorta abdominal em suínos

Silva, Alexandre Bueno da January 2012 (has links)
Introdução A visão tradicional afirma que as células miointimais responsáveis pela hiperplasia intimal derivam das células musculares lisas da média e que, através da mudança de seu fenótipo para um estado proliferativo, migram para a região intimal Esta visão tem sido contestada em algumas publicações que tem demonstrado o importante papel da adventícia na fisiopatologia da hiperplasia intimal. Objetivo: Analisar as alterações da estrutura da parede da aorta abdominal de suínos secundária a ressecção dos VV presentes na adventícia e no tecido conetivo Peri aórtico e avaliar se estas alterações se modificam com um período mais prolongado de isquemia da parede arterial. Material e método: Trata-se de um estudo experimental com uma série de dez suínos da raça Landrace , com idade entre 8 e12 semanas, pesando em torno de 20Kg. A aorta abdominal foi abordada por incisão retro peritoneal, o tecido Peri - aórtico contento os vasa vasorum e tecido gorduroso foi ressecado e este segmento de 1 cm envolvido por pericárdio bovino. Um grupo de animais foi sacrificado após 4 semanas e outro após 8 semanas. Os cortes histológicos foram corados com hematoxilina e coloração Weigert para identificar melhor as fibras elásticas. Foram analisados o processo inflamatório, neovascularização e a degeneração da camada media assim como a presença de hiperplasia e fibrose subendotelial. Resultado: Em ambas as coortes havia espessamento importante de todo o tecido Peri aórtico e do endotélio. Na coloração com H/E se identificava processo inflamatório moderado a intenso junto ao pericárdio em todos os casos. No grupo de 04 semanas o processo inflamatório e a neovascularização envolvia apenas o 1/3 externo da média e não se observava hiperplasia endotelial ou fibrose subendotelial evidentes. Já no grupo de 8 semanas havia uma progressão do grau de inflamação e neovascularização acentuada envolvendo mais de 2/3 da camada média da artéria. Neste grupo de 08 semanas observa - se hiperplasia endotelial focal, fibrose subendotelial e desestruturação da camada media e duplicação da lamina elástica interna.Conclusão : em nosso estudo, confirmamos que a isquemia da parede vascular secundária a interrupção do fluxo pelos VV mesmo sem lesão da adventícia gerou uma desestruturação da camada média , neovascularização acentuada, fibrose subendotelial e hiperplasia intimal que progride ao longo das 8 semanas. Estes resultados tem implicações práticas para o cirurgião vascular e endovascular, podendo contribuir para um melhor entendimento das re-estenoses secundárias à dissecção arterial nas cirurgias abertas e lesão por estiramento da parede nos procedimentos endovasculares.
22

Alterações histológicas secundárias à interrupção dos vasa vasorum na aorta descendente com o uso de terapia antiangiogênica : resultados em modelo suíno / Histological changes secondary to interruption of vasa vasorum flow in the descending aorta with the use of anti-angiogenic therapy : results in a porcine model

Castro Júnior, Cyro January 2016 (has links)
OBJETIVO: demonstrar as alterações histológicas secundárias ao uso de bevacizumabe na aorta descendente de suínos submetida à interrupção dos vasa vasorum. MATERIAIS E MÉTODOS: em doze suínos, divididos em grupos tratamento e controle (n=6 cada) foi realizada dissecção por 5 cm da aorta torácica, ligadura das artérias intercostais e cobertura com polivinil; o grupo tratamento recebeu uma dose endovenosa única de bevacizumabe. Após quinze dias, os animais foram sacrificados para retirada da artéria e preparo das lâminas histológicas dos grupos tratamento, controle e área não manipulada dos dois grupos. As lâminas foram analisadas com relação aos graus de angiogênese, injúria, inflamação e espessamento intimal. A análise estatística foi conduzida através da média e do desvio-padrão dos escores e as comparações entre os grupos foram realizadas pelo teste de Mann-Whitney. Para obtenção de intervalos de confiança de 95% para as médias das contagens dos escores utilizou-se a distribuição de Poisson, a fim de determinar o efeito estatístico. RESULTADOS: o bevacizumabe causou parefeitos em todos os suínos tratados, com um óbito. As variáveis analisadas através da Escala de Magnitude para Efeito Estatístico, demonstram tendência de redução da angiogênese e da injúria e de aumento da inflamação no limite do moderado. Não ocorreu modificação do espessamento intimal entre os grupos. CONCLUSÃO: a medicação utilizada na lesão da parede arterial induzindo hipóxia, mostrou tendência de redução da angiogênese e da injúria, mas não reduziu o processo inflamatório ou o espessamento intimal da parede arterial. O bevacizumabe mostrou toxicidade no modelo suíno. / OBJECTIVE: To demonstrate histological changes secondary to the use of bevacizumab in the descending aorta of pigs after interruption of vasa vasorum flow. METHODS: Twelve pigs were divided into control and treatment groups (n = 6 each). It was performed a 5-cm dissection of the thoracic aorta, ligation of the intercostal arteries and protection with polyvinyl chloride. Pigs in the treatment group received a single intravenous dose of bevacizumab. After 15 days, the animals were euthanized and the aorta removed. Histological slides were prepared for control and treatment groups and for the non-surgically manipulated part of the aorta in both groups. The slides were analyzed for the degree of angiogenesis, injury, inflammation, and intimal thickening. Data were expressed as mean (SD) of scores and groups were compared using the Mann-Whitney test. The Poisson distribution was used to calculate 95% confidence intervals for the mean scores in order to determine effect statistics. RESULTS: Bevacizumab had adverse effects on all treated pigs, leading to one death. The analysis using a scale of magnitudes for effect statistics showed a trend toward a decrease in angiogenesis and injury and an increase in inflammation for moderate effects. There was no change in intimal thickening in either group. CONCLUSION: The medication used for arterial wall injury inducing hypoxia showed a trend toward reduced angiogenesis and injury, but with no reduction in the inflammatory process or intimal thickening of the arterial wall. Bevacizumab showed toxicity in the porcine model.
23

Modelo experimental de influência dos vasa vasorum na estrutura da parede de aorta abdominal em suínos

Silva, Alexandre Bueno da January 2012 (has links)
Introdução A visão tradicional afirma que as células miointimais responsáveis pela hiperplasia intimal derivam das células musculares lisas da média e que, através da mudança de seu fenótipo para um estado proliferativo, migram para a região intimal Esta visão tem sido contestada em algumas publicações que tem demonstrado o importante papel da adventícia na fisiopatologia da hiperplasia intimal. Objetivo: Analisar as alterações da estrutura da parede da aorta abdominal de suínos secundária a ressecção dos VV presentes na adventícia e no tecido conetivo Peri aórtico e avaliar se estas alterações se modificam com um período mais prolongado de isquemia da parede arterial. Material e método: Trata-se de um estudo experimental com uma série de dez suínos da raça Landrace , com idade entre 8 e12 semanas, pesando em torno de 20Kg. A aorta abdominal foi abordada por incisão retro peritoneal, o tecido Peri - aórtico contento os vasa vasorum e tecido gorduroso foi ressecado e este segmento de 1 cm envolvido por pericárdio bovino. Um grupo de animais foi sacrificado após 4 semanas e outro após 8 semanas. Os cortes histológicos foram corados com hematoxilina e coloração Weigert para identificar melhor as fibras elásticas. Foram analisados o processo inflamatório, neovascularização e a degeneração da camada media assim como a presença de hiperplasia e fibrose subendotelial. Resultado: Em ambas as coortes havia espessamento importante de todo o tecido Peri aórtico e do endotélio. Na coloração com H/E se identificava processo inflamatório moderado a intenso junto ao pericárdio em todos os casos. No grupo de 04 semanas o processo inflamatório e a neovascularização envolvia apenas o 1/3 externo da média e não se observava hiperplasia endotelial ou fibrose subendotelial evidentes. Já no grupo de 8 semanas havia uma progressão do grau de inflamação e neovascularização acentuada envolvendo mais de 2/3 da camada média da artéria. Neste grupo de 08 semanas observa - se hiperplasia endotelial focal, fibrose subendotelial e desestruturação da camada media e duplicação da lamina elástica interna.Conclusão : em nosso estudo, confirmamos que a isquemia da parede vascular secundária a interrupção do fluxo pelos VV mesmo sem lesão da adventícia gerou uma desestruturação da camada média , neovascularização acentuada, fibrose subendotelial e hiperplasia intimal que progride ao longo das 8 semanas. Estes resultados tem implicações práticas para o cirurgião vascular e endovascular, podendo contribuir para um melhor entendimento das re-estenoses secundárias à dissecção arterial nas cirurgias abertas e lesão por estiramento da parede nos procedimentos endovasculares.
24

Att skapa en plats : - En studie av historiebruk i form av web-baserad marknadsföring av tre Vasaslott

Palmqvist Gillman, Andrea January 2014 (has links)
The purpose of my research has been to analyze the communi-cation of three cultural heritages and how they are being ex-posed on their respective webpages. The essay has also touched the subject as to how webpages can, through marketing of cul-tural heritages, create a connection to the marketed locations and their cultural environment. A phenomenon you could call “creating a location”. My study has also resulted in an under-standing of how historical sites as cultural actors position them-selves to attract visitors to the location. In this study I will fo-cus on only three of Sweden’s many renaissance castles. These three are Calmare-, Vadstena- and Gripsholm’s castle.My sources consist of the above mentioned cultural heritag-es own webpages, their administrators as well as their partner’s webpages. The information which is communicated in connec-tion to, or directly with the cultural heritages demonstrates what is relevant and important to see and experience.By illuminating these attributes, the possibility for self-interpretation of the cultural landscape can be lessened. Instead, a more direct picture can be created as of what the visitor should relate to and remember of the location. This way, the actors create a location.
25

Hur upplever personer som haft stroke högintensiv träning?

Frykberg, Josefine, Stuffler, Nicole January 2019 (has links)
No description available.
26

Att iscensätta en dynasti : Om smycken i Elisabet Vasas hemgift 1581 / Staging a Dynasty : Jewellery in Elisabet Vasa’s Dowry 1581

Söderqvist, Jessica January 2022 (has links)
On May 7, 1581, Elisabet Vasa, Princess of Sweden, married Duke Kristoffer of Mecklenburg. The Princess was equipped with a large dowry and, by Swedish standards, an extensive collection of objects, including jewellery. The essay's thesis is that the official jewellery that Elisabet brought with her to her new court were identity-creating symbols of a performative nature that would consciously strengthen the legitimacy of the new Vasa dynasty on the international stage. The essay is based on a comparative analysis of inventories from 1581, 1593 and 1597. The essay examines and discusses the donors' and recipient's agency, or "touch", and intentions with the jewellery. The essay's result shows that parts of the thesis - that the official jewellery that Elisabet brought with her among the gifts in 1581 were identity-creating symbols of a performative nature - appear to be highly probable based on the few but significant art acts that have been possible to trace in sources and archives. According to the material of the existing study, however, the jewellery did not fulfil its intended function of strengthening the Vasa dynasty and its legitimacy on the international stage as Elisabet herself had different intentions and apparently actively worked to assimilate to her new environment as Duchess of Mecklenburg.
27

Kan dagens teorier för upprorsbekämpning tillämpas vid studier av historiska konflikter? : En kvalitativ studie av David Kilcullens teorier om upprorsbekämpning. / The Dacke War, a peasant uprising in Sweden : Counter-insurgency, a timeless phenomenon

Johansson, Daniel January 2016 (has links)
Uppror och upprorsrörelser har förekommit långt tillbaka i historien. Redan romarna hade problem med upproriska rebellgrupper som vägrade inordna sig Roms lagar. Militärteoretiker har ägnat lång tid åt att försöka analysera bästa möjliga lösning på upproret. Dagens teorier kring uppror är starkt präglade av nuvarande konflikter i Irak och Afghanistan. David Kilcullens teorier utgår från dessa samlade erfarenheter och utgör idag förlaga till en rad nationers strategier för upprorsbekämpning. Risken är att dessa strategier är ett resultat av erfarenheter dragna här och nu.  Syftet med denna studie har varit att pröva i vilken utsträckning Kilcullens teorier är utan orsakssamband och tidlösa då teorierna fått ligga till grund för nationers strategiutveckling avseende upprorsbekämpning. Detta har gjorts genom att Kilcullens teorier prövats mot Gustav Vasas agerande under Dackefejden.  Resultatet av studien visar på stora skillnader när det gäller våldsanvändning. Det går inte att belägga att Kilcullens teorier skulle vara tillämpbara vid en upprorsbekämpning i en historisk konfliktmiljö som präglas av hög grad av strukturerat våld. Studien påvisar dock att Vasa vid flera tillfällen agerade med ickevåldsmetoder som till del går att återfinna i Kilcullens teorier.  Sammantaget påvisar studien resultat som pekar på att Kilcullens teorier besitter ett antal orsakssamband och inte kan anses som tidlös. / Uprising and insurgency has always been present during history. Military theorists have been studying various uprisings during history in order to develop solutions how to counter uprisings and insurgency. Current theories involving counter-insurgency are in some way influenced by on-going conflicts in Iraq and Afghanistan. With the possibility of being type casted, the theories of David Kilcullen is based on US experiences from Operation Iraqi Freedom and Operation Enduring Freedom and form the basic foundation of numerous national strategies when it comes to counter-insurgency and policy-making.  The purpose of this study is to assess in what way Kilcullen´s theories are without causality and in what way they are timeless as the theory form the basis of several nations modern counter-insurgency strategies. The study has been done by appliqueing Kilcullen´s theories on the actions taken by Gustav Vasa during the Dacke War.  The result shows great deviation when it comes to the amount of violence being used.  It is not possible to confirm Kilcullen´s theories being applicable studying a historical uprising characterised by great violence. The study does on the other hand show acts of non-violent actions taken by Gustav Vasa that correlates with the theories of David Kilcullen.  As a result the study shows evidence of causality and the theories seemingly being a result of the present situation. Therefore the Kilcullen theories can not be seen as timeless.
28

Sulfur-Related Conservation Concerns in Marine Archaeological Wood : The Origin, Speciation and Distribution of Accumulated Sulfur with Some Remedies for the <i>Vasa</i>

Fors, Yvonne January 2008 (has links)
<p>Synchrotron-based sulfur spectroscopy reveals a common concern for marine archaeological wood from seawater: accumulation of reduced sulfur compounds in two pathways. The distribution of sulfur species in the oak wood cell structure was mapped by scanning x-ray spectro-microscopy (SXM). Organically bound sulfur was found within lignin-rich parts, identified mainly as thiols and disulfides by sulfur K-edge x-ray absorption near edge structure (XANES) spectroscopy. Particles of iron sulfides, which may form in the presence of corroding iron, appeared in wood cavities. Cores scanned by x-ray fluorescence (XRF) show that high sulfur accumulation is restricted to the surface layers for the Swedish shipwreck <i>Vasa</i>, while the distribution is rather uniform throughout the hull timbers of the <i>Mary Rose</i>, U.K. Laboratory experiments, exposing fresh pine to simulated seabed conditions, show that the organically bound sulfur develop in reactions between lignin, exposed by cellulose-degrading erosion bacteria, and hydrogen sulfide produced <i>in situ</i> by scavenging sulfate reducing bacteria. With bacteria inoculated from shipwreck samples also iron sulfides formed. The iron sulfides oxidise in high humidity, and are the probable main cause of the numerous outbreaks on the Vasa’s hull of acidic sulfate salts, which were identified by x-ray powder diffraction (XRD). The iron ions catalyse several wood-degrading oxidative processes. Multi-elemental analyses were performed by scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (ESCA). The present amounts of total S remaining in the <i>Vasa</i> and the <i>Mary Rose</i> are estimated to at least 2 tonnes. After the <i>Vasa´s</i> spray treatment with polyethylene glycol solutions ceased in 1979, the continuing oxidation processes are estimated to have produced 2 tonnes of sulfuric acid in the wood. Laboratory experiments to gently neutralize acidic <i>Vasa</i> wood by ammonia gas have been conducted with promising results.</p>
29

"Från vrak till världsklass" : En studie om Vasamuseets marknadsföring

Beijerstam, Emma, Sköldefalk, Frida January 2010 (has links)
<p>Sverige har ett stort utbud av besöksmål och kan erbjuda människor många och varierande upplevelser. Det medför att en hård konkurrens förekommer på marknaden om att locka besökare. En attraktion måste därför kunna erbjuda något unik som lockar till intresse och skapar en medvetenhet hos den potentiella besökaren. För att få en kund att besöka en specifik attraktion krävs även att kunden får ett värde vid besöket som resulterar i en minnesvärd upplevelse. Marknadsföring är ett viktigt verktyg för att på ett effektivt sätt kunna kommunicera det unika med en attraktion till den tänkta besökaren. Vasamuseet är ett unikt besöksmål som erhåller regalskeppet Vasa som deras primära sevärdhet. Museet har över en miljon besökare varje år och är ett av Sveriges attraktivaste besöksmål.</p><p>Syftet med denna studie är att klargöra och diskutera hur Vasamuseets marknadsföring organiseras med tanke på deras unika attraktion. Uppsatsen riktar sig främst till potentiella besökare men likväl till människor som tidigare besökt Vasamuseet. Detta för att skapa en förståelse och förhoppningsvis ett intresse kring hur museets marknadsföring organiseras för att kunna nå ut till omvärlden som de i högsta grad är en del av. Uppsatsen utgick från en induktiv ansats med kvalitativa djupintervjuer. De respondenter som är förekommande i studien innefattar fem anställda på Vasamuseet som besitter betydande kunskap för vårt forskningsämne.</p><p>Uppsatsens slutsats visar på att personlig försäljning är ett väl användbart marknadsföringsverktyg för Vasamuseet att nå ut till sina besökare. Personlig försäljning lämpar sig bäst då museet främst marknadsför sig genom workshops utomlands i och med att deras primära marknader finns utanför Sveriges gränser.</p>
30

Sulfur-Related Conservation Concerns in Marine Archaeological Wood : The Origin, Speciation and Distribution of Accumulated Sulfur with Some Remedies for the Vasa

Fors, Yvonne January 2008 (has links)
Synchrotron-based sulfur spectroscopy reveals a common concern for marine archaeological wood from seawater: accumulation of reduced sulfur compounds in two pathways. The distribution of sulfur species in the oak wood cell structure was mapped by scanning x-ray spectro-microscopy (SXM). Organically bound sulfur was found within lignin-rich parts, identified mainly as thiols and disulfides by sulfur K-edge x-ray absorption near edge structure (XANES) spectroscopy. Particles of iron sulfides, which may form in the presence of corroding iron, appeared in wood cavities. Cores scanned by x-ray fluorescence (XRF) show that high sulfur accumulation is restricted to the surface layers for the Swedish shipwreck Vasa, while the distribution is rather uniform throughout the hull timbers of the Mary Rose, U.K. Laboratory experiments, exposing fresh pine to simulated seabed conditions, show that the organically bound sulfur develop in reactions between lignin, exposed by cellulose-degrading erosion bacteria, and hydrogen sulfide produced in situ by scavenging sulfate reducing bacteria. With bacteria inoculated from shipwreck samples also iron sulfides formed. The iron sulfides oxidise in high humidity, and are the probable main cause of the numerous outbreaks on the Vasa’s hull of acidic sulfate salts, which were identified by x-ray powder diffraction (XRD). The iron ions catalyse several wood-degrading oxidative processes. Multi-elemental analyses were performed by scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (ESCA). The present amounts of total S remaining in the Vasa and the Mary Rose are estimated to at least 2 tonnes. After the Vasa´s spray treatment with polyethylene glycol solutions ceased in 1979, the continuing oxidation processes are estimated to have produced 2 tonnes of sulfuric acid in the wood. Laboratory experiments to gently neutralize acidic Vasa wood by ammonia gas have been conducted with promising results.

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