Dissertations / Theses on the topic 'Tauiwi'
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Kahui, Dennis Jon. "A cultural approach to music therapy in New Zealand : a Maori perspective : a dissertation presented in partial fulfilment of the requirements for the degree of Master of Music Therapy at Massey University, NZ School of Music, Wellington, New Zealand." Massey University, 2008. http://hdl.handle.net/10179/898.
Full textWillgrén, I.-L. (Iina-Lotta). "Dupuytrenin tauti." Master's thesis, University of Oulu, 2018. http://jultika.oulu.fi/Record/nbnfioulu-201803021287.
Full textSorvali, M. (Mikko). "Kienböckin tauti." University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201508041903.
Full textAkers, Eric Michael. "Aldebaran (Alpha Tauri)." [Huntington, WV : Marshall University Libraries], 2008. http://www.marshall.edu/etd/descript.asp?ref=870.
Full textJoncour, Isabelle. "Imagerie Doppler des étoiles T Tauri." Phd thesis, Université Paris-Diderot - Paris VII, 1994. http://tel.archives-ouvertes.fr/tel-00725018.
Full textSmith, Kester William. "Accretion mechanisms in T Tauri systems." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627592.
Full textJONCOUR, ISABELLE. "Imagerie doppler des etoiles t tauri." Paris 7, 1994. http://www.theses.fr/1994PA077352.
Full textShenton, Mervyn. "Multiwavelength study of RV Tauri stars." Thesis, Keele University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304453.
Full textWorrell, John Kingsley. "Stellar pulsation and the RV Tauri phenomenon." Thesis, University of St Andrews, 1985. http://hdl.handle.net/10023/6509.
Full textKunnas, K. (Kari). "Alzheimerin tauti ja insuliiniresistenssin osuus taudin kehityksessä." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201606072464.
Full textWahlgren, Glenn Michael. "A spectral analysis of RV Tauri variables /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu148726636233899.
Full textBouvier, Jerome. "Rotation et activité dans les étoiles T Tauri." Phd thesis, Université Paris-Diderot - Paris VII, 1987. http://tel.archives-ouvertes.fr/tel-00725122.
Full textBouvier, Jérôme. "Rotation et activité dans les étoiles T Tauri." Paris 7, 1987. http://www.theses.fr/1987PA077021.
Full textBouvier, Jérôme. "Rotation et activité dans les étoiles T Tauri." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603384s.
Full textKasper, Markus Erdmann. "Optimierung einer adaptiven Optik und ihre Anwendung in der ortsaufgelösten Spektroskopie von T Tauri." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961620153.
Full textRatzka, Thorsten. "High spatial resolution observations of young stellar binaries." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975232703.
Full textBubar, Eric Joseph. "Keck HIRES spectroscopy of candidate post T Tauri stars." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181666291/.
Full textGregory, Scott G. "T Tauri stars : mass accretion and X-ray emission." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/336.
Full textArmitage, P. J. "Accretion discs in T Tauri stars and interacting binaries." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596148.
Full textKoerner, David Sargent Anneila Isabel Sargent Anneila Isabel. "The kinematics of circumstellar disks around T Tauri stars /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-10312007-162008.
Full textSousa, Alana Paixao de. "Aquecimento em colunas de acreção de estrelas T Tauri." Universidade Federal de Minas Gerais, 2011. http://hdl.handle.net/1843/JCBV-8PBHRJ.
Full textEstrelas jovens de baixa massa que ainda mostram sinais de acreção, ou seja, estrelas T Tauri clássicas (ETTCs), apresentam um número significativo de linhas de emissão em seu espectro. Essas linhas de emissão são produzidas em colunas de acreção e são modeladas para obter parâmetros físicos do sistema disco-estrela, tal como a taxa de acreção de massa. No entanto, a estrutura de temperatura das colunas de acreção ainda está em aberto. Apresentamos neste trabalho um estudo do perfil de temperatura destas colunas encontradas em torno de ETTCs. Consideramos objetos estelares jovens (~10? anos) e de baixa massa (M* 2 Msol, que têm disco de acreção em rotação kepleriana. Adotamos um modelo de acreção magnetosférica, onde a estrela central tem um campo magnético de dipolo que interrompe o disco em uma distância de alguns raios estelares (rtr 0.1 UA) desde a estrela, perto do raio de co-rotação. A acreção do gás segue as linhas de campo magnético estelar desde rtr até a estrela. Para determinarmos o perfil de temperatura no funil, usamos a primeira lei da termodinâmica resolvida para o átomo de hidrogênio em um estado estacionário. Este resultado nos fornece a equação de calor que foi resolvida, juntamente com as equações de taxas para o átomo de hidrogênio, considerando os mecanismos de excitação e desexcitação colisional (com prótons e elétrons), recombinação radiativa, transição espôntanea, ionização colisional e fotoionização. Usamos como processos de aquecimento, a compressão adiabática estudada por Martin (1996) e também o aquecimento por raios-X, proveniente da estrela central, e como mecanismo de resfriamento consideramos as linhas de CaII e MgII e bremsstrahlung. Com esses mecanismos, determinamos a estrutura de temperatura para as colunas de acresção e os principais processos físicos que aquecem e resfriam o gás. Encontramos também que a taxa de acreçõo de massa e a luminosidade de raios-X, são os parâmetros de maior importância para o perfil de temperatura.
Procópio, Lilian Costa. "Auto-ecologia de espécies de couratari (Lecythidaceae): uma abordagem para o manejo e conservação." Instituto Nacional de Pesquisas da Amazônia, 2010. http://localhost:8080/tede/handle/tede/2016.
Full textMade available in DSpace on 2016-01-22T18:17:35Z (GMT). No. of bitstreams: 2 Tese_Lilian Costa Procópio.pdf: 2258575 bytes, checksum: 517710da476e34bcf830d7dba372b318 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2010-12-03
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Fundação de Amparo à Pesquisa do Estado do Amazonas - FAPEAM
“Tauaris” are trees which belong to Lecythidaceae and are among the most logged timber species of Amazonia. However, their auto-ecology is poorly known, partly due to the use of only a few local names for all the species. This study defines, firstly, tauari species that occur in non-flooded forests of Amazonia and their patterns of abundance and geographic distribution. Then it characterizes regeneration aspects through functional morphology and biometry of fruits and seeds and germination physiology. Finally, the study defines the growth strategies of trees (DBH>10 cm). Data from herbaria and from >400 ha of inventory throughout the Amazonian biome were used to characterize the geographic ranges and the species abundances. Morpho-functional descriptions of fruits and seeds were based on material collected from trees of Central Amazonia (Manaus and Belterra, Brazil). The morphology of germination was described from experiments in the nursery. The physiology of germination was based on tests of seed tolerance to dessication, photoblastism and germination at different constant temperatures between 15 and 35 ° C. Growth strategies were defined through anual growth rates (average and maximum) based on 25-years monitoring in two forests logged under several cutting intensities (Paracou, French Guina; Belterra-Pará, Brazil). The tauari group consists of 14 species of the three genus. Nine were invetoried in the study areas. Couratari guianensis has the largest geographic range and is most frequent in inventories, however always with low densities (<1 tree/ha). Couratari stellata, C. multiflora, C. oblongifolia and Cariniana micrantha showed large geographical ranges (>1.10^6 km2), high frequencies and medium/high densities. Couratari atrovinosa, C. longipedicellata and C. tauari showed low abundances and regional or restricted ranges. The study provides new information about carpologia of poorly collected species (C. atrovinosa, C. tauari, C. longipedicellata) and the first description of the fruit of C. atrovinosa. For five simpatric Couratari species fo Central Amazonia, biometric measurements pointed out the need for a revision of the sections and / or a the variables of the fruit that determine each section. The slow drying of the fruit allows a gradual dispersal of seeds, unique among Lecythidaceae. Seedlings of the five Couratari species with foliaceous cotyledons and photosynthetic reserves in the hypocotyl are a rare morpho-functional type. The hypocotyl, folded below the insertion of the cotyledons, is a type that was still not documented. The seeds of each species showed desiccation tolerance, since germinated after reaching 7.9%, or less, of seed water content. Germination occurred in light and dark. C. guianensis and C. stellata had high germination rates at constant temperatures between 15 to 35 °C while C. longipedicellata and C. atrovinosa germinated significantly less below 20 °C and above 25 °C. The five species can be separated by the seed dispersal period (dry or rainy season). Temperature of 25 °C was appropriate for evaluation of seed quality of the five species. The group has characteristics that help management of seeds and species propagation species such as desiccation tolerance, fast germination, in every light conditions and temperature of 25 °C appropriate for seed quality evaluation. Growth strategies, described for Couratari guianensis, C. multiflora and C. stellata, were specific to each one and related to wood density and maximum size of the adults. C. stellata, emergent, had a weak growth potential (GP) in sub-canopy and much higher above (DAP 10-19 cm: 4 mm/ano; >30 cm: 16 mm/ano) and high growth rates for the largest adults (dbh>30 cm; 4,6-5,9 cm/year). In contrast, C. multiflora, lower canopy species, had a GP negatively correlated to tree size and the lowest average growth rate for adults (dbh>30 cm; 1,8-2,3 mm/year). Logging stimulated the growth of the three species during 15 years and growth increased with logging intensity. The growth of C. multiflora was positively correlated to the intensity of the dry season. The different growth strategies of the three species have consequences on the forest management. This work allowed to classify the species studied of Couratari as late secondary species.
Tauari é a denominação popular das madeiras provenientes de várias espécies de Lecythidaceae e estão entre as mais exploradas na Amazônia. A auto-ecologia destas espécies é mal conhecida devido, em parte, ao agrupamento sob o mesmo nome vernacular. Este estudo determina as espécies de tauari ocorrentes nas florestas de terra firme do bioma Amazônia e os seus padrões de abundância e de distribuição geográfica; caracteriza aspectos da regeneração pela morfo-biometria funcional dos frutos e sementes e pela fisiologia da germinação e define as estratégias de crescimento das árvores (DAP>10 cm). Dados de herbários e inventários (>400 ha) no bioma Amazônia foram usados para caracterizar as abundâncias e distribuições geográficas específicas. Descrições morfo-funcionais e medições de frutos e sementes foram feitas a partir de coletas em árvores da Amazônia Central (Manaus e Belterra, Brasil). A morfologia da germinação foi descrita a partir de experimentos em viveiro. A fisiologia da germinação foi analisada a partir de ensaios de tolerância das sementes ao dessecamento, o fotoblastimo e a capacidade de germinar em diferentes temperaturas constantes entre 15 e 35 °C. Estratégias de crescimento foram definidas com base nas taxas de crescimento diamétrico anual (médias e máximas) das árvores durante ~25 anos em florestas exploradas sob diversas intensidades (Paracou, Guiana Francesa; Belterra- PA, Brasil). O nome vernacular tauari agrupa 14 espécies dos gêneros Couratari, Cariniana e Allantoma. Nove foram inventariadas no estudo. Couratari guianensis se destacou por sua maior área de distribuição e alta freqüência nos inventários, porém sempre com abundância baixa (<1 árvore/ha). Cariniana micrantha, Couratari stellata, C. multiflora, C. oblongifolia apresentaram ampla distribuição (>1.10 6 km2), alta freqüência e densidades localmente altas. Couratari atrovinosa, C. longipedicellata e C. tauari mostraram abundâncias baixas e distribuição regional ou restrita. O estudo traz novas informações sobre a carpologia de espécies pouco coletadas (C. atrovinosa, C. tauari, C. longipedicellata) e a primeira descrição do fruto de C. atrovinosa. A biometria apontou a necessidade de uma revisão das seções infragenéricas e/ou das variáveis dos frutos que determinam cada seção para cinco espécies simpátricas da Amazônia Central. A secagem lenta do fruto permite a dispersão gradual das sementes, única entre as Lecythidaceae. As plântulas das cinco espécies de Couratari com os cotilédones foliáceos fotossintetizantes e reservas no hipocótilo constituem um tipo morfo- funcional raro. O hipocótilo, dobrado abaixo da inserção dos cotilédones, era um tipo ainda não documentado. As sementes destas cinco espécies são tolerantes ao dessecamento, pois germinaram com teor de água abaixo de 7,9%. A germinação ocorreu na luz e no escuro. Couratari guianensis e C. stellata apresentavam germinação máxima entre 15 a 35 °C enquanto C. longipedicellata e C. atrovinosa germinaram menos, abaixo de 20 °C e acima de 25 °C. A época de dispersão das sementes (estação seca ou chuvosa) permite separar as espécies. O manejo das sementes e a propagação destas espécies são facilitados pela tolerância ao dessecamento, a germinação rápida, sem necessidade de luz, e a temperatura de 25 °C adequada para avaliação da qualidade das sementes. A estratégia de crescimento definida para C. guianensis, C. multiflora e C. stellata, foi intrínseca da espécie e relacionada à densidade da madeira e tamanho máximo das adultas. Couratari stellata, emergente, teve um potencial de crescimento (PC) fraco no sub-dossel e muito maior acima (DAP 10-19 cm: 4 mm/ano; >30 cm: 16 mm/ano), com altas taxas de crescimento das maiores adultas (DAP>30 cm; 4,6-5,9 cm/ano). Ao contrário, C. multiflora, espécie de dossel inferior, teve um PC negativamente correlato ao tamanho das árvores e o menor crescimento médio para as adultas (DAP>30 cm: 1,8-2,3 mm/ano). O estímulo do crescimento pela exploração durou ~15 anos e foi maior nas áreas mais exploradas. O crescimento de C. multiflora foi positivamente correlato à intensidade da estação seca. As diferentes estratégias de crescimento têm conseqüências sobre o manejo florestal. Este trabalho permitiu classificar as espécies de Couratari estudadas como segundárias tardias na sucessão florestal.
Heath, Sarah E. "Evolutionary consequences of viral resistance in the marine picoeukaryote Ostreococcus tauri." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31082.
Full textFrink, Sabine. "Kinematics of T Tauri stars in nearby star forming regions." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=961689390.
Full textDaemgen, Sebastian. "The evolution of protoplanetary disks in T Tauri binary systems." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-149771.
Full textStempels, Henricus Cornelis. "An Observational Study of Accretion Processes in T Tauri Stars." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3420.
Full textKa'ili, Tēvita O. "Tauhi Vā : creating beauty through the art of sociospatial relations /." Thesis, e-Book (PDF), 2008. http://www.library.auckland.ac.nz.ezproxy.auckland.ac.nz/eproducts/ebooks/Tauhi_Va_Creating_Beauty_Final_Copy.pdf.
Full textBrannigan, Emma Leigh. "A spectroscopic and spectro-astrometric study of T Tauri stars." Thesis, University of Hertfordshire, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440155.
Full textGoldsmith, M. J. "A study of R Coronae Borealis and RV Tauri stars." Thesis, Keele University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328254.
Full textDouglas, Kevin Arthur. "A numerical simulation of the young stellar outflow DG Tauri B." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ56707.pdf.
Full textSymington, Neil H. "Observations and modelling of accretion phenomena in Classical T Tauri stars." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421579.
Full textMachado, Leandro José Rodrigues. "Development and application of stellar wind models to T Tauri stars." Doctoral thesis, Universidade do Porto. Reitoria, 2001. http://hdl.handle.net/10216/9882.
Full textJalava, L. (Laura). "Tauti, vaiva vai ominaisuus?:semioottinen tulkinta myöhemmän iän korkean verenpaineen merkityksellistymisestä." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201505141519.
Full textHuhtala, H. (Heli). "Tieteellinen tauti, inhimillinen tarina ja yhteinen taistelu:syövän tulkintakehykset ja metaforat journalismissa." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805241929.
Full textMachado, Leandro José Rodrigues. "Development and application of stellar wind models to T Tauri stars." Tese, Universidade do Porto. Reitoria, 2001. http://hdl.handle.net/10216/9882.
Full textKasper, Markus Erdmann. "Optimization of an adaptive optics system and its application to high-resolution imaging spectroscopy of T Tauri." [S.l. : s.n.], 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8986347.
Full textWilliams, Beverley Anne Harwood, and bevwilliams@bigpond com. "The Advent of Methodism and the I Taukei: The Methodist Church in Fijian Nation-making." La Trobe University. School of Social Sciences, Sociology and Anthropology Program, 2008. http://www.lib.latrobe.edu.au./thesis/public/adt-LTU20091221.121517.
Full textCruz, Gerson Kleber de Almeida. "Variação longitudinal e transversal nas propriedades da madeira do Tauari Vermelho (Cariniana micrantha Ducke – Lecythidaceae)." Universidade Federal do Amazonas, 2006. http://tede.ufam.edu.br/handle/tede/4519.
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FAPEAM - Fundação de Amparo à Pesquisa do Estado do Amazonas
The work had the objective of studying the variation of density, shrinkage and fiber length from pith-bark and base to top direction of the tree. The samples were collected from five equidistant positions in the pith-bark direction, corresponding to 0%, 25%, 50%, 75% and 100%, and in the heights of base, DAP, 50%, 75% and 100% of the tree. Three trees were used and the samples had nominal dimensions of 2,0 x 3,0 x 5,0 cm. The results showed that occurred tendency of basic density variations in pith-bark and base-top directions. In the pith-bark direction the density increased until the position of 50% (heartwood) and followed by decreasing to minimum values on sapwood near bark (100%). Minimum values of density were observed on sapwood and maximum values on heartwood. In the base-top direction, a tendency of decreasing density was observed for samples from sapwood. Minimum values were found on sapwood (100%) where it was practically free of extractives. In the other positions there were not obvious tendencies of density behaviour which may be caused by extractive. Volumetrics and linear shrinkages had tendency to decrease in the pith-bark direction, independently of position of the sample in the trunk. The anisotropic factor (T/R), was lower in the area near pith, increasing substantially towards the sapwood. Area near pith showed smaller rate of anisotropic factor and heartwood and sapwood showed greater rate of anisotropic factor. There was no statistic difference for basic density and volumetric, tangencial and radial shrinkages in the longitudinal direction of the trunk of tauari . But, there was significant statistic differences in the radial direction. The test Tukey of multiple comparisons of averages showed statistic differences on basic density only among the position of 100% and the others. While these were statistically the same to each other, in other words, the density of the heartwood was statistically larger than the density of the sapwood. The same relationship was found in the radial path for tangential and radial shrinkages. Thus, the position of 100%, smaller shrinkage value, was statistically different to the others, with the neighbor's 75% exception. While the shrinkages verified in the positions of 0%, 25%, 50% and 75% did not differ. The results were comparable to the radial volumetric shrinkage. The anisotropic factor, as well as fiber lengths were statistically non significant on both directions (longitudinally and radially).
O trabalho teve por objetivo estudar a variação da densidade, retratibilidade e comprimento de fibras da madeira do tauari vermelho (Cariniana micrantha Ducke – Lecythidaceae), no sentido medula-casca e ao longo da altura da árvore. As amostras foram obtidas em cinco posições eqüidistantes no sentido medula-casca, correspondendo a 0%, 25%, 50%, 75% e 100%, e na Base, DAP, 50%, 75% e 100% da altura comercial da árvore. Três árvores foram usadas e as amostras tiveram dimensões nominais de 2,0 x 3,0 x 5,0 cm. Os resultados mostraram que houve variação da densidade básica no sentido medula-casca. No sentido medula-casca houve uma tendência da densidade aumentar da posição de 50% (cerne) e em seguida diminuir para os valores mínimos na região do alburno próximo a casca (100%). Os mínimos valores de densidade foram verificados na região do alburno e máximos na região do cerne. No sentido basetopo, um comportamento de tendência de decréscimo de densidade foi observado para as amostras retiradas do alburno. Os mínimos valores foram encontrados na região do alburno (100%) o qual está praticamente livre de extrativos. Nas demais posições não houve uma tendência clara de comportamento da densidade, o que pode ser explicado em parte pela presença de extrativos. As contrações volumétricas e lineares totais tenderam a diminuir no sentido medula-casca, independentemente da posição da amostra no fuste. O fator anisotrópico foi mais baixo na região próximo a medula, aumentando em direção a região do alburno. A região próxima a medula apresentou os menores índices de fator anisotrópico e no cerne e alburno os maiores índices. Para a densidade básica e nas contrações (volumétrica, tangencial e radial) não houve diferença estatística no sentido longitudinal do tronco do tauri. Porém, ambos mostraram-se estatisticamente significantes na direção radial. O teste Tukey de comparações múltiplas de média mostrou para a densidade que somente a posição de 100% foi estatisticamente diferente das demais. Enquanto estas foram estatisticamente iguais entre si, ou seja, a densidade do cerne foi estatisticamente maior que a densidade do alburno. A mesma relação foi encontrada no sentido radial para as contrações tangencial e radial. Em que a posição de 100%, menor valor de contração, foi significantemente diferente das demais, exceção da vizinha 75%. Enquanto as contrações verificadas nas posições de 0%, 25%, 50% e 75% não diferiram estatisticamente. Resultados estes são comparáveis à contração volumétrica radial. O fator anisotrópico, assim como comprimento de fibras foram estatisticamente não significativos, tanto no sentido longitudinal como no sentido radial ao tronco do tauari.
Williams, Beverley. "The advent of Methodism and the I Taukei the Methodist Church in Fijian nation-making /." Bundoora, Victoria : La Trobe University, 2008. http://bibpurl.oclc.org/web/39301.
Full textDescription based on print version record. "A thesis in total fulfilment of the requirements for the degree of Master of Arts in Anthropology [to the] School of Social Sciences, Sociology and Anthropology Program, Faculty of Humanities and Social Sciences, La Trobe University, Bundoora". Includes bibliographical references (leaves 151-166)
Ylönen, S. (Susanna). "Genetic risk factors for movement disorders in Finland." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526223988.
Full textTiivistelmä Parkinsonin tauti ja Huntingtonin tauti ovat hermostoa rappeuttavia eteneviä liikehäiriösairauksia, jotka tyypillisesti ilmenevät aikuisiällä. Tässä tutkimuksessa selvitettiin näiden kahden liikehäiriösairauden geneettisiä riskitekijöitä suomalaisilla potilailla. Tutkimme potilaita, joilla oli varhain alkava Parkinsonin tauti tai myöhään alkava Parkinsonin tauti sekä väestökontrolleja. GBA-geenin p.L444P mutaation havaittiin lisäävän Parkinsonin taudin riskiä. Kaksi Parkinsonin tautia sairastavaa potilasta oli yhdistelmäheterotsygootteja haitallisten POLG1-geenin varianttien suhteen ja harvinaiset POLG1 CAG toistojaksovariantit assosioituivat Parkinsonin tautiin. Tutkittuja variantteja SMPD1-, LRRK2- ja CHCHD10-geeneissä ei löydetty tästä aineistosta lainkaan, mikä viittaa siihen, että ne puuttuvat suomalaisesta väestöstä tai ovat harvinaisia. Huntingtonin tautia sairastavilta potilailta tutkittiin HTT-geenin haploryhmiä ja niiden vaikutusta Huntingtonin tautia aiheuttavan pidentyneen toistojakson epästabiiliuteen. Haploryhmä A oli suomalaisessa väestössä harvinainen verrattuna eurooppalaiseen väestöön ja se oli huomattavasti yleisempi Huntingtonin tautipotilailla kuin väestössä. Toistojakson epästabiiliuteen vaikuttivat tietyt HTT-geenin haplotyypit samoin kuin sen vanhemman sukupuoli, jolta pidentynyt toistojakso periytyy. POLG1 yhdistelmäheterotsygoottien katsottiin aiheuttavat Parkinsonin tautia ja harvinaisten POLG1 CAG toistojaksovarianttien todettiin assosioituvan Parkinsonin tautiin Suomessa. GBA p.L444P mutaatio merkittävästi yleisempi Parkinsonin tautipotilailla kuin kontrolleilla, mikä viittaa siihen, että se on Parkinsonin taudin riskitekijä. Huntingtonin tautiin assosioituvan haploryhmä A:n matala frekvenssi selittää taudin vähäistä esiintyvyyttä Suomessa. Paternaalinen periytyminen ja haplotyyppi A1 lisäsivät HTT-geenin toistojakson pidentymisen riskiä. Liikehäiriösairauksilla todettiin Suomessa osittain samanlaisia riskitekijöitä kuin muualla Euroopassa, mutta kaikkia tutkittuja variantteja emme havainneet
Persson, Magnus. "T Tauri stars : Optical lucky imaging polarimetry of HL and XZ Tau." Thesis, Stockholm University, Department of Astronomy, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-35802.
Full textOptical lucky imaging polarimetry of HL Tau and XZ Tau in the Taurus-Auriga molecular cloud was carried out with the instrument PolCor at the Nordic Optical Telescope (NOT). The results show that in both the V- and R-band HL Tau show centrosymmetric structures of the polarization angle in its northeastern outflow lobe (degree of polarization ~30%). A C-shaped structure is detected which is also present at near-IR wavelengths (Murakawa, 2008), and higher resolution optical images (Stapelfeldt, 1995). The position angle of the outflow is 47.5+-7.5 degrees, which coincides with previous measurements and the core polarization is observed to decrease with wavelength and a few scenarios are reviewed. Measuring the outflow witdh versus distance and wavelength shows that the longer wavelengths scatter deeper within the cavity wall of the outflow. In XZ Tau the binary is partially resolved, it is indicated by an elongated intensity distribution. The polarization of the parental cloud is detected in XZ Tau through the dichroic extinction of starlight. Lucky imaging at the NOT is a great way of increasing the resolution, shifting increases the sharpness by 0.1 asec and selection the sharpest frames can increase the seeing with 0.4 asec, perhaps more during better conditions.
Fraschetti, F., J. J. Drake, O. Cohen, and C. Garraffo. "Mottled Protoplanetary Disk Ionization by Magnetically Channeled T Tauri Star Energetic Particles." IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627037.
Full textPaska, Andrey. "Chemical evolution of inner regions of protoplanetary disks around T Tauri stars." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/chemical-evolution-of-inner-regions-of-protoplanetary-disks-around-t-tauri-stars(86d0948e-1568-4014-9e8b-723244edba5b).html.
Full textDjouani, Tahri El-batoul. "Caractérisation moléculaire de la transmission lumineuse vers l'horloge circadienne de la microalgue Ostreococcus tauri." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20150.
Full textLight quality and intensity change frequently in the water column. Therefore marine microalgae are exposed to large changes in light spectrum. Photoperception mechanisms in microalgae are expected to differ from those of land plants since the marine environment has unique properties of light transmission. The focus of my PhD project concerns two mains topics, circadian clock regulation and photoperception in the microalga Ostreococcus tauri. In recent years, O. tauri has emerged as a promising model organism using functional genomics approaches to study complex processes such as the circadian clock regulations. My study was focused on the involvement of a two components system in light transmission to the circadian clock of Ostreococcus. I have studied the molecular mechanisms underlying the regulation of the core clock component TOC1. I have also characterized a novel eukaryotic blue light photoreceptor called LOV-HK, which regulates circadian clock function in Ostreococcus. Using an inducible promoter system to modulate the levels of TOC1 and LOV-HK, I have analyzed the importance of their transcriptional regulations in the clock. Finally, I have shown that LOV-HK and more generally the circadian clock, regulates cell growth and biomass in Ostreococcus tauri
Degraeve, Guilbault Charlotte. "Caractérisation des glycérolipides et de la dynamique de remodelage en chaines acyles chez Ostreococcus tauri." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0825/document.
Full textThe marine green picoalga Ostreococcus tauri is a minimal eukaryote implemented as model system that has been used as gene resource for lipid biology. Detailed information about its lipidic features was however missing. During my PhD, I characterized O. tauri glycerolipidome and associated dynamics under environmental stresses such as nutrient starvations and chilling and investigated transcriptional variations of putative target enzymes responsible for these changes. O. tauri which could be validated as model for related species of the class Mamiellophyceae, was found to display unique lipidic features related to both green and Chromalveolates microalgae. Docosahexaenoic acid (DHA) is confined to presumed extraplastidial lipids i.e. phosphatidyldimethylpropanethiol (PDPT) and the betaine lipid diacylglyceryl-hydroxymethyl-trimethyl-β-alanine (DGTA); all of these compounds are hallmarks of Chromalveolates. Plastidial lipids found to be of prokaryotic type are characterized by the overwhelming presence of C18 n-3 polyunsaturated FA (PUFA), 18:5 n-3 being restricted to galactolipids. C16:4 n-3, an FA typical of green microalgae galactolipids, also was a major component of O. tauri extraplastidial lipids. Triacylglycerols (TAGs) display the complete panel of FAs, and their molecular combinations designate a major plastidial origin of DAG precursors. Nitrate starvation greatly increases TAG content, in particular 18:X/16:X (sn-1/sn-2) combinations, and was associated with the transfer of carbon from phosphatidylglycerol (PG) and monogalactosyldiacylglycerol (MGDG) to TAG indicating an increased contribution of the plastidial pathway to the TAG synthesis. Preliminary RT-qPCR experiments on TAG metabolism genes revealed an important transcriptional activation of some diacylglycerol acyltransferases (DGAT). Nutrient starvations severely repress Δ6 desaturase activity and result in the inversion of the 18:3/18:4 ratio in plastidial lipids that was feedback into TAG. The fine-tuning and dynamic regulation of the 18:3/18:4 ratio suggests an important physiological role of these FAs in photosynthetic membranes. Chilling generates an increase of 18:5 in galactolipids. The active quest for the desaturases responsible for this phenotype was achieved by expressing candidate genes in homologuous and heterologous (S. cerevisiae, N. Benthamiana) systems and led to the identification of two yet uncharacterized plastidial Δ6 desaturases. These desaturases display original and non-redundant specificity between each other and with the previously characterized in O. tauri Δ6 acyl-CoA desaturase
Meng, Huan Y. A., Peter Plavchan, George H. Rieke, Ann Marie Cody, Tina Güth, John Stauffer, Kevin Covey, et al. "PHOTO-REVERBERATION MAPPING OF A PROTOPLANETARY ACCRETION DISK AROUND A T TAURI STAR." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621264.
Full textSimon, M. N., I. Pascucci, S. Edwards, W. Feng, U. Gorti, D. Hollenbach, E. Rigliaco, and J. T. Keane. "TRACING SLOW WINDS FROM T TAURI STARS VIA LOW-VELOCITY FORBIDDEN LINE EMISSION." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622166.
Full textHorrobin, Matthew. "A study of T Tauri stars with multiple spectral types and their surface temperatures." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/28248.
Full textHerczeg, Gregory J. "Molecular hydrogen fluorescence and accretion in far-ultraviolet spectra of classical T Tauri stars." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/dissertations/fullcit/3178336.
Full textPollard, Karen R. "The nature of the low mass supergiants : RV Tauri and R Coronae Borealis variables." Thesis, University of Canterbury. Astronomy, 1994. http://hdl.handle.net/10092/7632.
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