Dissertations / Theses on the topic 'And Alt'
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James, Jessica. "CTRL-ALT-DELETE." Thesis, California State University, Long Beach, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1523196.
Full textThis thesis examines concepts of control, alternation, and deletion (CTRL, ALT, DELETE) through the poetic process. By examining some of the specific poems presented here, one can see the effects of literary and social critics including Michel Foucault, Hart Crane, and Adrienne Rich on my poetry. Thematically, structurally, and linguistically, the poems in this thesis address contemporary concerns and ask the reader to face the challenges of postmillennial life with creativity, empathy, and humor.
Becker, Hans-Joachim. "Das Feld um "alt" /." Heidelberg : C. Winter, 1991. http://catalogue.bnf.fr/ark:/12148/cb371607491.
Full textHaas, Anna-Lena [Verfasser], Bernd [Akademischer Betreuer] [Gutachter] Alt-Epping, and Julie [Gutachter] Schanz. "Symptomkontrolle und Lebensqualität als primärer Endpunkt klinischer Studien - ein "Systematic Review" / Anna-Lena Haas ; Gutachter: Bernd Alt-Epping, Julie Schanz ; Betreuer: Bernd Alt-Epping." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1145292208/34.
Full textCosta, Badia Xavier. "Paisatges monàstics. El monacat alt-medieval als comtats catalans (segles IX-X)." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668151.
Full textThis doctoral thesis proposes an innovative approach to the monastic landscape of the Catalan counties in the 9th and 10th centuries using two clearly-differentiated levels of detail. Firstly, a study of a more general nature is undertaken, starting by identifying all the monasteries that can be documented, to create a comprehensive cartography of the monastic phenomenon with which to analyse its spatial distribution, the parallels to be detected and the different models of behaviour that can be distinguished. Secondly, a meticulous study of three specific landscapes with a high concentration of monasteries is undertaken, all with the aim of establishing just how these centres interacted with their physical and social settings, clearly transforming them but at the same time being profoundly conditioned by them. This gives a comprehensive, holistic view of the monastic phenomenon to allow a better understanding of the reasons for the rapid proliferation of sites in the 9th and 10th centuries, as well as the complex role
La presente tesis doctoral propone una aproximación innovadora al paisaje monástico de los condados catalanes de los siglos IX y X mediante dos niveles de detalle bien diferenciados. En primer lugar, se plantea un estudio de carácter más general que, partiendo de la identificación de todos los monasterios que se pueden documentar en ese territorio, crea una cartografía completa del fenómeno monástico sobre la cual analizar su distribución espacial, los paralelos que se detectan en ella y los diversos modelos de comportamiento que se pueden distinguir. En segundo lugar, se propone un estudio más minucioso de tres paisajes concretos, todos ellos con una elevada concentración de monasterios, para precisar cómo estos centros se relacionaron con su entorno físico y social, transformándolo de forma evidente, pero, a su vez, viéndose profundamente condicionados por él. De esta manera se consigue dar una visión holística e integral del monacato que permite entender mejor el porqué de la rápida proliferación de cenobios a lo largo de los siglos IX y X, así como el papel tan complejo que jugaron en la articulación social, política, económica y religiosa de los condados catalanes.
Becker, Claudia. "Steuerung Alt Entfernen / Re-boot Science." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-101879.
Full textNüesch, Rebecca [Verfasser], Rainer [Akademischer Betreuer] Alt, Rainer [Gutachter] Alt, and Hubert [Gutachter] Österle. "Hybride Kundeninteraktion : Fallstudien und Gestaltungsempfehlungen aus der Bankindustrie / Rebecca Nüesch ; Gutachter: Rainer Alt, Hubert Österle ; Betreuer: Rainer Alt." Leipzig : Universitätsbibliothek Leipzig, 2016. http://d-nb.info/124069539X/34.
Full textMarzec, Paulina. "NR2C/F telomeric association drives telomere-genome rearrangements in ALT cells." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20179.
Full textCellular immortality is always accompanied by the activation of telomere maintenance mechanism. In most human cancers this role is fulfilled by the telomerase enzyme. However in 15% of tumors, telomerase is not activated and telomeres are maintained by an Alternative Lengthening of Telomeres (ALT) pathway that involves telomere-telomere recombination. Interestingly ALT is more prevalent in tumors originating from mesenchymal tissues (sarcomas), where it is present in 40-60% of cases, than in epithelial tumors. Understanding ALT maintenance is critical since inhibiting telomerase in tumors leads to the activation of ALT. The ALT pathway is operationally defined by typical telomere hallmarks. In ALT cells, aberrant DNA transactions are not restricted to telomeres since genomes are often highly rearranged. Whether these abnormal genomic features are linked to atypical telomere maintenance is not known, but genome instability is certainly contributing to transformation. We have previously shown that orphan receptors of the NR2C/F families were enriched at telomeres in ALT cell lines. We proposed that these factors could be recruited to telomeres through direct binding to the GGGTCA variant repeat, a high affinity binding site for these proteins. My project is aimed at understanding (i) their mechanism of binding and (ii) their role, if any, in the ALT process.We show that in human primary sarcomas, ALT telomeres are often bound by orphan nuclear receptors of the NR2C/F subfamilies, particularly in more advanced-stage tumors. This suggests an active role for these factors in ALT tumor progression. Using ChIP-sequencing, we show that NR2C/F proteins bind to an amplified direct repeat (DR0) at telomeres, and not significantly to any other GGGTCA motif combination. We also analyzed the genome wide distribution of NR2C2/F2 and TRF2, a telomere binding protein, in ALT(-) and in ALT(+) cells. While there are only few genomic sites bound by TRF2 in ALT(-) cells, we were surprised to identify several hundred regions bound by TRF2 in ALT(+) cells. More surprisingly, the great majority of these ALT specific TRF2 regions overlap with endogenous NR2C2/F2 sites. Since these sites usually do not contain telomere repeats, TRF2 is likely indirectly recruited. Consistent with this interpretation, we show that NR2C/F factors drive locus proximity. Moreover, a subset of these unique genomic regions harbor heterogeneous ALT telomere sequence additions, not only suggesting a telomere recruitment role for NR2C/F proteins but also a recombination targeting function in the genome. Consistently, we find these telomere/genome rearrangements are located close to endogenous GGGTCA motifs. Next, we wanted to evaluate a role of these rearrangements in formation of complex karyotype which characterize approximately 50% of sarcomas. We found by spectral karyotyping that interstitial telomeric sites are frequently located at translocation/ rearrangements sites between two or more chromosomes, which we could also observe in our ChIPseq data. Furthermore, we demonstrate that addition of interstitial telomeric sites to the genome is enhanced by DNA damage and specific for ALT genome. Therefore we conclude that NR2C/F factors target telomere proximity to defined NR2C/F regions which enables telomere-genome rearrangements under DNA damage condition. This contributes not only to efficient telomere recombination, but also it drives further genomic instability at selected NR2C/F sites.We believe we identified a new mechanism of telomere dysfunction potentially driving targeted genome instability and mediated by NR2C/F proteins in ALT cells which probably underlie complexity of sarcomas genome. Understanding the ALT mechanism allows designing NR2C/F-targeted therapies in treatment of ALT tumors and therapies for patients treated with anti-telomerase drugs to prevent ALT appearance
Alt, Katharina [Verfasser]. "Muster gesellschaftlicher Teilhabe in Mainz / Katharina Alt." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/119193215X/34.
Full textStagno, d'Alcontres Martina. "Deconstructing the ALT-associated promyelocytic leukemia bodies." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/30783.
Full textJohnson, David Ward. "New applications for poly(ethylene-alt-maleic anhydride)." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/886/.
Full textČiučelytė, Ilma. "Lietuvos šėmųjų karvių kepenų fermentų kitimo dinamika." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140305_135308-02460.
Full textIn order to diagnose a hepatic disorder a biochemical blood test was carried out. Even slight changes in hepatic function show a decrease or an increase in the concentration of hepatic enzymes. Our aim was to monitor 3 enzymes: alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and aminotransferase (AST). From the results of the blood test we deduced hepatic enzyme funcionality of local Lithuanian cow breed („ Lietuvos šėmųjų“). The experiment was carried out during indoor and pasture periods. The greatest activity of alkaline phosphatase was observed during the pasture period and during the indoor period its activity was greatly reduced. The activity of aminotransferase and lactate dehydrogenase was independent on the season.
Sibanda, Thabani. "Capital budgeting practices : an empirical study of companies listed on the ALT X." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/36801.
Full textDissertation (LLM)--University of Pretoria, 2012.
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Financial Management
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Braun, Michael [Verfasser], and Florian [Akademischer Betreuer] Alt. "Affective automotive user interfaces / Michael Braun ; Betreuer: Florian Alt." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1215499809/34.
Full textWinkler, Gertraud. "Die Wortbildung mit "-lich" im Alt-, Mittel- und Frühneuhochdeutschen /." Heidelberg : Universitätsverl. Winter, 1995. http://catalogue.bnf.fr/ark:/12148/cb39035992d.
Full textPerrem, Kilian Thomas. "Molecular Studies of an alternative lengthening of telomeres (ALT) mechanism." University of Sydney. Children's Medical Research Institute, 2001. http://hdl.handle.net/2123/793.
Full textBabiceanu, Mihaela. "Analysis of the Allergenic Potential of the Ubiquitous Airborne Fungus Alternaria Using Bioinformatics." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/73007.
Full textPh. D.
Tröger, Ralph [Verfasser], Rainer [Akademischer Betreuer] Alt, Rainer [Gutachter] Alt, and Wolfgang [Gutachter] Stölzle. "Supply Chain Event Management – Bedarf, Systemarchitektur und Nutzen aus Perspektive fokaler Unternehmen der Modeindustrie / Ralph Tröger ; Gutachter: Rainer Alt, Wolfgang Stölzle ; Betreuer: Rainer Alt." Leipzig : Universitätsbibliothek Leipzig, 2014. http://d-nb.info/1239421575/34.
Full textBoine, Ane Lodden. "Alt må læres. : En historisk studie av fornorskingen av samene." Thesis, Norges teknisk-naturvitenskapelige universitet, Pedagogisk institutt, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15944.
Full textGómez, i. Grau Ferran. "Estudio sobre la toxoplasmosis en Andorra y el Alt Urgell." Doctoral thesis, Universitat de Barcelona, 2004. http://hdl.handle.net/10803/786.
Full textLa toxoplasmosis es una de las más importantes zoonosis del ser humano. Esta ocasionada por Toxoplasma gondii un parásito coccidio apicomplejo de distribución cosmopolita.
En este estudio se pretende determinar y analizar la seroprevalencia de anticuerpos, frente a este parásito, de tipo G y de tipo M en mujeres gestantes del Principado de Andorra y los anticuerpos de tipo G en los habitantes de las principales poblaciones de la comarca del Alt Urgell (Lleida), Bellver de Cerdanya y Martinet (Girona).
En el estudio realizado en Andorra se han analizado un total de 1936 muestras de sangre, mediante la técnica de inmunofluorescencia indirecta (IFI), de mujeres gestantes residentes en las siete parroquias que forman el principado obteniéndose las siguientes tasas de seroprevalencia de anticuerpos G: Andorra la Vella 43,9 %, Canillo 45 %, Encamp 47,4 %, Escaldes 52 %, La Massana 45,6%, Ordino 45 % y Sant Julià 42,9 %. La prevalencia global del principado se situó en el 45,9 %. La prevalencia global de anticuerpos M fue del 0,6 %. Agrupando la población analizada en grupos de edad se observa un significativo (p<0.05) aumento de la seroprevalencia con la edad. La seroprevalencia fué homogénea entre las siete parroquias analizadas (p=0.5274).
Para realizar el estudio de la comarca del Alt Urgell se obtuvieron un total de 2603 muestras de pacientes atendidos en la Fundació Sant Hospital de la Seu d'Urgell, residentes en alguna de las seis principales poblaciones de la zona, de ambos sexos y de todas la edades. En este caso se analizaron exclusivamente los anticuerpos de tipo G, mediante la técnica de enzimoinmunoanálisis de micropartículas (MEIA). Las tasas de seroprevalencia fueron las siguientes: Bellver de Cerdanya 55,5 %, Coll de Nargó 44,4 %, Martinet 53,8 %, Oliana 53,9 %, Organya 48,6 % y la Seu d'Urgell 50,6 %. La prevalencia global de la comarca se situó en el 51,1 %. Se obtuvo una significativa mayor seroprevalencia del sexo masculino (p<0.05) con un 56,3 % frente al 44,4 % femenino y también un significativo aumento de la tasa de seroprevalencia con la edad (p<0.05), en la población menor de 16 años la prevalencia media fue del 37,7 % mientras que a partir de los 45 años pasó a ser del 64,3 %. No se observaron diferencias significativas entre las tasas de seroprevalencia de las distintas localidades analizadas tanto de manera global como comparando los distintos grupos de edad y sexos.
Las características geográficas u ocupacionales de los habitantes de las localidades analizadas no fueron factores determinantes del grado de infección por Toxoplasma gondii. Al mismo tiempo, el ambiente rural o urbano no fue en ningún caso un condicionante de la tasa de seroprevalencia.
Tanto en el Principado de Andorra como en el Alt Urgell y las poblaciones de Bellver de Cerdanya y Martinet, se observa una desprotección frente a Toxoplasma gondii, de la población femenina en edad fértil, cercana o superior al 50 %. En el segmento de edad más joven (menos de 16 años) esta desprotección puede llegar al 70 %. Por lo tanto, los análisis de control y las medidas preventivas son indispensables durante el embarazo, sobre todo en las gestantes seronegativas.
Oppedal, Anita Iren. "Alt er metadata : Bruk av metadata i et integrert brukersystem." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-227.
Full textDenne hovedfagsavhandlingen setter fokus på hvordan metadata brukes i et integrert brukersystem i en bedrift.
I et informasjonsrom er informasjonsressurser fra ulike medier intergrert, og en trenger et felles “bindeledd” for å støtte bedre gjenfinning og tilgang til informasjon i informasjonsrommet. Problemet er ofte at de ulike medier bruker ulike format for beskrivelse av sine informasjonsressurser, noe som vanskeliggjør interoperabilitet mellom de ulike medier. Dersom de ulike medier kan bruke samme metadataformat til å beskrive sine informasjonsressurser, vil det bedre interoperabiliteten.
Dublin Core Metadata Element Set (DC) er et format utviklet med tanke på publisering av informasjonsressuser via Intranett og Internett. Det er DC som er bindeleddet i det virtuelle informasjonsrommet som denne avhandlingen tar utgangspunkt i.
Sentralt i denne avhandlingen står vurderingen av hvordan Adresseavisens indekseringsbehov kan tilfredsstilles i DC for informasjonsressurser som artikler, bilder/illustrasjoner og film. Forslag til et kjerneformat for Adresseavisens informasjonsressurser, med medieavhengige variasjoner legges frem. Dette er informasjonsressurser hvor avis er brukskontekst. Forslaget som fremlegges imøtekommer resultater fra brukerundersøkelsen, og opplysninger og observasjon av hvordan indekseringsformatene allerede benytter brukes.
Undersøkelsen har resultert i følgende funn:
• De fleste brukere velger fritekstsøk fremfor metadatasøk
• Opplæring virker inn på bruk av metadata
• Arbeidsoppgaver/Informasjonsbehov påvirker bruk av metadata
• Erfaring med databasesystemet og hyppighet i søk i databasen kan påvirke bruk av metadata
• Noen metadataelement er mer bedre egnet for søk enn andre.
Undersøkelsene gir også anbefalinger som kan være nyttige ved navngivning av metadata. Følgende fremgår av undersøkelsen:
• Forkortelser i navngivning av metadata bør unngås for å gjøre dem mer selvforklarende
• Tvetydige begreper i navngivning av metadata gjør dem mindre intuitive i forhold til forståelse for innhold
Undersøkelsen er presentert med stolpediagram og tabeller, som er metoder som kan brukes til kvalitative analyser.
Alt, Isabel Teresa [Verfasser], and Bernd [Akademischer Betreuer] Plietker. "Eisenkatalysierte C-H-Aminierungsreaktionen / Isabel Teresa Alt ; Betreuer: Bernd Plietker." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1178424723/34.
Full textBuschek, Daniel [Verfasser], and Florian [Akademischer Betreuer] Alt. "Behaviour-aware mobile touch interfaces / Daniel Buschek ; Betreuer: Florian Alt." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1164377337/34.
Full textRomare, Elisabeth. "Präpositionen und Präpositionalisierungsprozesse : der räumliche Bereich im Alt- und Mittelniederdeutschen /." Göteborg : Acta Universitatis Gothoburgensis, 2004. http://catalogue.bnf.fr/ark:/12148/cb410998198.
Full textRakei, Abdollkarim. "Wasserhaushalt eines Alt- und Jungkiefernbestandes auf Rostbraunerde des Grunewaldes (Berlin) /." Berlin : Technische Univ, 1992. http://www.gbv.de/dms/bs/toc/018498043.pdf.
Full textOrr, Katherine. "Roller Derby Performativity: Utilizing Alt Narratives in the Composition Classroom." CSUSB ScholarWorks, 2018. https://scholarworks.lib.csusb.edu/etd/750.
Full textAuchter, Morgan. "Implication de la topoisomérase IIIa dans la stabilité chromosomique au cours de la recombinaison télomérique des cellules cancéreuses." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4008.
Full textIn somatic cells, telomeres erode with each cell division. This process named « Replicative Senescence » is basically counterbalanced in the budding yeast Saccharomyces cerevisiae by the action of telomerase which, while it is inactive in somatic cells of higher eukaryotes is activated in 85 % of cancer cases. Another process of telomere maintenance is involved in 15% of remaining cancer cases and is called Alternative Lengthening of Telomere (ALT). In this process, telomere maintenance is provided by telomeric recombination mechanisms inducing exchange of telomeric sister chromatid (T-SCE).We assessed the existence of an ALT mechanism in B-CLL known to rarely express telomerase. We have shown that 90% of B-CLL patients have a decreased expression of TopoIIIα correlated with largest methylation of CpG islands of the gene promoter region. Our results suggest that in B-CLL, telomere maintenance is defective either by telomerase or ALT mechanism.We investigated the involvement of post- SUMOylation of TopoIIIα/Top3 in mechanisms regulating ALT phenomenon. We have shown that TopoIIIα was SUMOylated in vitro and in vivo in U2-OS ALT cells. We also observed in S. cerevisiae that Top3p might be SUMOylated in absence of telomerase activity. Our results suggested that the SUMOylation of TopoIIIα increased its activity in vitro and in vivo by reducing its affinity for telomeres once recombination occurred and would be required for its accumulation in APBs but not for their formation
Seidel, Wiebke [Verfasser], Bernd [Akademischer Betreuer] Alt-Epping, Bernd [Gutachter] Alt-Epping, and Rheinwall Nicole [Gutachter] Steinbüchel-. "Symptome, Belastungen und palliativmedizinischer Handlungsbedarf im Verlauf inkurabler Krebserkrankungen im Kopf- und Halsbereich / Wiebke Seidel ; Gutachter: Bernd Alt-Epping, Nicole Steinbüchel- Rheinwall ; Betreuer: Bernd Alt-Epping." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1206731656/34.
Full textGOTO, HIDEMI, HISAO HAYASHI, NAOKI MIZUTANI, TAKASHI KUMADA, HIDENORI TOYODA, MOTOYOSHI YANO, SHINYA WAKUSAWA, et al. "Biochemical Staging of the Chronic Hepatic Lesions of Wilson Disease." Nagoya University School of Medicine, 2014. http://hdl.handle.net/2237/19492.
Full textRhein, Adolf [Verfasser]. "Alt-Erfurter Einband-Meister. Werkstätten und Einbände. Anhang : Stempellisten / Adolf Rhein." Erfurt : Universitätsbibliothek Erfurt, 2012. http://d-nb.info/1019516720/34.
Full textDepping, Reinhard. "Charakterisierung der ADP-Ribosyltransferasen ModA, ModB und Alt des Bakteriophagen T4." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964586479.
Full textHoffmann, Kurt [Verfasser]. "Jung und Alt. Dialog der Generationen : Analysen - Perspektiven - Modelle / Kurt Hoffmann." Hamburg : Diplom.de, 2014. http://d-nb.info/1117543609/34.
Full textDahm, Ulrike. "Opferkult und Priestertum in Alt-Israel : ein kultur- und religionswissenschaftlicher Beitrag /." Berlin : Walter De Gruyter, 2003. http://catalogue.bnf.fr/ark:/12148/cb39051433z.
Full textBauer, Renate. "Adversus judaeos : Juden und Judentum im Spiegel alt- und mittelenglischer Texte /." Frankfurt am Main : Lang, 2003. http://catalogue.bnf.fr/ark:/12148/cb41114081s.
Full textStigermark, Anton. "Alt-Modernism : Challenging the idea of postmodernism as a left-wing movement." Thesis, Uppsala universitet, Statsvetenskapliga institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324280.
Full textEriksson, Elin. "Perceptions of Women in the Far-Right : A Comparative Ideology Analysis of Far-Right Perceptions of Women." Thesis, Uppsala universitet, Statsvetenskapliga institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-444733.
Full textAlt, Simon [Verfasser]. "Steuerungs- und Regelungsentwurf für Transportsysteme mit örtlich verteilt wirkendem Stelleingriff / Simon Alt." Aachen : Shaker, 2017. http://d-nb.info/1138179167/34.
Full textSmith, Steve, and Albert Dobrenz. "Improved Alt Tolerance in Alfalfa: Past Success and Prospects for the Future." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/200537.
Full textLind, Peter. ""Strunt alt hvad du orerar" : Carl Michael Bellman, ordensretoriken och Bacchi Orden." Doctoral thesis, Uppsala universitet, Avdelningen för retorik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-214576.
Full textAlt, Matthias [Verfasser]. "Synergiepotentiale von Benzin-Direkteinspritzung in Verbindung mit weiteren verbrauchsreduzierenden Technologien / Matthias Alt." Aachen : Shaker, 2007. http://d-nb.info/1166516423/34.
Full textHerrmann, Andrew F. "I Hit the Ctrl-Alt-Del Button': Technology Professionals’ Stories of Quitting." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/822.
Full textPerez, Alyssa Cathryn. "“Make America Great Again”: Political Rhetoric of the American Alt-Right Movement." Universität Leipzig, 2018. https://ul.qucosa.de/id/qucosa%3A21128.
Full textKönig, Stefan. "Regers Hymnus der Liebe für Bariton (oder Alt) und Orchester op. 136." Internationale Arbeitsgemeinschaft für die Musikgeschichte in Mittel- und Osteuropa an der Universität Leipzig, 2017. https://ul.qucosa.de/id/qucosa%3A32330.
Full textHenson, Jeremy D. "The role of Alternative Lengthening of Telomeres in human cancer." University of Sydney, 2006. http://hdl.handle.net/2123/1533.
Full textActivation of a telomere maintenance mechanism is a vital step in the development of most cancers and provides a target for the selective killing of cancer cells. Cancers can use either telomerase or Alternative Lengthening of Telomeres (ALT) to maintain their telomeres and inhibition of either telomere maintenance mechanism can cause cancer cells to undergo senescence or apoptosis. Although telomerase inhibitors are undergoing clinical trials, on commencing this study very little was known about the role of ALT in cancer, what proteins were involved in its mechanism and regulation and how it could be targeted clinically. The primary aim of this thesis was to develop an assay for ALT suitable for examining archived tumour specimens and to begin using it to examine the prevalence and clinical significance of ALT in cancer. This assay and gene expression analysis was also used to identify genes that are involved in or associated with the activation of the ALT mechanism, to contribute towards the overall goal of an ALT cancer therapy. The ALT mechanism involves recombination mediated replication and ALT cells have a marked increase in a range of recombinational events specifically at their telomeres. Presumably, as a consequence of this the telomere lengths of ALT cells are very heterogeneous and on average long. This can be detected by terminal restriction fragment (TRF) Southern analysis, which has been used previously as the definitive test for ALT activity. However, TRF analysis requires intact genomic DNA and is unsuitable for tumour specimens which are commonly archived by paraffin embedding. Another hallmark of ALT is ALT-associated PML bodies (APBs) which are the subset of PML bodies that contain telomeric DNA. Work done in this study to consolidate APBs as a hallmark of ALT, combined with published data, showed 29/31 ALT[+], 3/31 telomerase[+] and 0/10 mortal cell lines/strains are APB[+]. The three APB[+]/telomerase[+] cell lines identified here had an order of magnitude lower frequency of APB[+] nuclei than the ALT[+] cell lines. APBs may be functionally linked to the ALT mechanism and contain the recombination proteins that are thought to be involved in the ALT mechanism. This study, in collaboration with Dr W-Q Jiang, strengthened this functional link by demonstrating that loss of ALT activity (as determined by TRF analysis) coincided with the disruption of APBs. The detection of APBs was developed into a robust assay for ALT in archived tumour specimens using a technique of combined immunofluorescence and telomere fluorescence in situ hybridisation. It was demonstrated that the APB assay concurred exactly with the standard assay for ALT (TRF analysis) in 60 tumours for which TRF analysis gave unequivocal results. The APB assay may be a more appropriate technique in the case of tumour specimen heterogeneity, which may explain why the APB assay was able to give definitive results when TRF analysis was equivocal. We demonstrated that intratumoral heterogeneity for ALT does exist and this could explain why about 3% of tumours in this study were APB[+] but with more than a ten-fold reduction in the frequency of APB[+] nuclei. This study also made the novel discovery of single stranded C-rich telomeric DNA inside APBs which potentially could be used to make the APB assay more suitable for routine pathology laboratory use. The APB assay was used to show that ALT is a significant concern for oncology. ALT was utilised in approximately one quarter of glioblastoma multiforme (GBM), one third of soft tissue sarcomas (STS) including three quarters of malignant fibrous histiocytomas (MFH), half of osteosarcomas and one tenth of non-small cell lung carcinomas (NSCLC). Furthermore, the patients with these ALT[+] tumours had poor survival; median survivals were 2 years for ALT[+] GBM, 4 years for ALT[+] STS including 3.5 years for ALT[+] MFH and 5 years for ALT[+] osteosarcoma. ALT[+] STS and osteosarcomas were also just as aggressive as their ALT[-] counterparts in terms of grade and patient outcome. ALT status was not found to be associated with response to chemotherapy in osteosarcomas or survival in STS. ALT was however, less prevalent in metastatic STS. The APB assay was a prognostic indicator for GBM and was correlated with three fold increased median survival in GBM (although this survival was still poor). ALT was more common in lower grade astrocytomas (88% ALT[+]) than GBM (24% ALT[+]) and ALT[+] GBM had an identical median age at diagnosis to that reported for secondary GBM. It is discussed that these data indicate that ALT was indirectly associated with secondary GBM and is possibly an early event in its progression from lower grade astrocytoma. This is relevant because secondary GBM have distinct genetic alterations that may facilitate activation of the ALT mechanism. Putative repressors of ALT could explain why this study found that ALT varied among the different STS subtypes. ALT was common in MFH (77%), leiomyosarcoma (62%) and liposarcoma (33%) but rare in rhabdomyosarcoma (6%) and synovial sarcoma (9%). ALT was not found in colorectal carcinoma (0/31) or thyroid papillary carcinoma (0/17) which have a high prevalence of telomerase activity and a reduced need for a telomere maintenance mechanism (low cell turnover), respectively. A yeast model of ALT predicts that one of the five human RecQ helicases may be required for ALT. Using the APB assay to test for the presence of ALT in tumours from patients with known mutations in either WRN or RECQL4 it was demonstrated that neither of these RecQ helicases is essential for ALT. Although p53 and mismatch repair (MMR) proteins have been suggested to be possible repressors of ALT, there was no apparent increase in the frequency of ALT in tumours from patients with a germline mutation in p53 codon 273 or in colorectal carcinomas that had microsatellite instability and thus MMR deficiency. Also contrary to being a repressor of ALT but consistent with its ability to interact with a protein involved in the ALT mechanism, the MMR protein MLH1, was demonstrated to be present in the APBs of an ALT[+] cell line. To further test for genes that may be involved in the ALT mechanism or associated with its activation, RNA microarray was used to compare the gene expression of 12 ALT[+] with 12 matched telomerase[+] cell lines; 240 genes were identified that were significantly differentially expressed (p<0.005) between the ALT[+] and telomerase[+] cell lines. Only DRG2 and SFNX4 were significantly differentially expressed after adjusting for the estimated false positive rate. Overall, DRG2, MGMT and SATB1 were identified as most likely to be relevant to the ALT[+] tumours and Western analysis indicated that DRG2 and MGMT levels were down-regulated after activation of ALT and up-regulated after activation of telomerase, whereas SATB1 protein levels appeared to be up-regulated after immortalisation but to a higher degree with activation of ALT compared to telomerase. Since lack of MGMT is known to be a determinant of temozolomide sensitivity in GBM, the possibility that ALT and the APB assay could be used to predict temozolomide sensitivity is discussed. The microarray data was consistent with MGMT expression being suppressed by EGF (p < 0.05), indicating that caution may be needed with combining EGFR inhibitors with temozolomide in ALT cancers. One ALT[+] cell line which did not express MGMT had TTAA sequence in its telomeres. This could possibly have resulted from mutations due to lack of MGMT expression and a possible role for MGMT in the ALT mechanism is discussed. Further analysis of the microarray data identified two groups of co-regulated genes (p < 5x10-5): CEBPA, TACC2, SFXN4, HNRPK and MGMT, and SIGIRR, LEF1, NSBP1 and SATB1. Two thirds of differentially expressed genes were down-regulated in ALT. Chromosomes 10 and 15 had a bias towards genes with lower expression in ALT while chromosomes 1, 4, 14 and X had a bias towards genes with higher expression levels in ALT. This work has developed a robust assay for ALT in tumour specimens which was then used to show the significance of ALT in sarcomas, astrocytomas and NSCLC. It has also identified genes that could possibly be molecular targets for the treatment of ALT[+] cancers.
Hamdi, Elagab Ali [Verfasser], and Helmut [Akademischer Betreuer] Alt. "Synthesis of Mononuclear Transition Metal Complexes and their Applications as Catalysts for Ethylene Polymerization / Hamdi Ali Elagab. Betreuer: Helmut Alt." Bayreuth : Universität Bayreuth, 2008. http://d-nb.info/1059696339/34.
Full textMata, Benedicto Josep. "El simbolisme de l'orientació en el temple romànic : el bisbat de la Seu d'Urgell, S. IX-XII." Doctoral thesis, Universitat de Barcelona, 1989. http://hdl.handle.net/10803/405457.
Full textJohnson, Natalie Marguerite. "Making America White Again: Twitter, the Alt-Right, and Colorblindness in Trump America." Scholarship @ Claremont, 2018. http://scholarship.claremont.edu/scripps_theses/1144.
Full textAlt, Milan [Verfasser], and U. [Akademischer Betreuer] Lemmer. "Performance and processability of organic field effect transistors / Milan Alt. Betreuer: U. Lemmer." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1080246312/34.
Full textTkac, Jan. "Detection of telomeric DNA circles in human ALT cells using rolling circle amplification." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/15217.
Full textWürtemberger, Sonja. ""Im Text-Turnier wurde keiner meiner Gegner alt" : Sängerstreit in Sangspruch und Sprechgesang." kostenfrei, 2009. http://d-nb.info/997916745/34.
Full textAlt, Joscha Arne [Verfasser]. "Untersuchungen von physiologischen und molekularen Grundlagen der Mechanosensorik bei Insekten / Joscha Arne Alt." Gießen : Universitätsbibliothek, 2019. http://d-nb.info/1185976906/34.
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