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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.
211

Porovnání účinnosti přímé a nepřímé metody genetické transformace u bramboru (Solanum tuberosum L.) / A comparison of efficacy of direct and indirect methods of genetic transformation of potato (Solanum tuberosum L.)

PŘIBYLOVÁ, Marie January 2008 (has links)
Potato is one of the main targets for genetic improvement by gene transfer. The aim of this study was to compare the efficacy of genetic transformation of potato, cultivar Bintje, using two methods: Agrobacterium tumefaciens mediated transformation and microprojectile bombardment. The same plasmid p35SGUSint, which cosists of 35S CaMV promoter, gus and nptII genes, was used for both transformations of internodal potato explants. Kamamycin selection, transient and stable expressions of {$\beta$}-glucuronidase and PCR amplification of gus and nptII transgenes were used for transgenic plant selection, identification and analysis.
212

Studium genetické variability fytoplazem / The Study of the genetic variability of phytoplasmas

ROHÁČKOVÁ, Helena January 2011 (has links)
Phytoplasmas are bacterial intracellular plant pathogens that cause devasting yield losses in diverse crops worldwide. Phytoplasmas were detected in clover and Catharanthus roseus plants, pear, apple and apricot trees. SecA and 16S rRNA genes, spacer region and 23S rRNA gene of five phytoplasma isolates were sequenced.
213

Sistema para an?lise de sequ?ncias nucleot?dicas do HIV dispon?veis no GenBank

Gon?alves, Jos? Irahe Kasprzykowski 15 December 2015 (has links)
Submitted by Luis Ricardo Andrade da Silva (lrasilva@uefs.br) on 2016-03-31T01:16:15Z No. of bitstreams: 1 Disserta??o Final.pdf: 2489318 bytes, checksum: 74b79aac96fa73b31d6e0dbb4272efe3 (MD5) / Made available in DSpace on 2016-03-31T01:16:15Z (GMT). No. of bitstreams: 1 Disserta??o Final.pdf: 2489318 bytes, checksum: 74b79aac96fa73b31d6e0dbb4272efe3 (MD5) Previous issue date: 2015-12-15 / HIV infects over 40 million people worldwide and is considered by the World Health Organization a large scale pandemic. Which the associated disease has no cure. New data and analysis can help new treatment and vaccine development. However, the dataset is vast, with over 500,000 sequences available on GenBank. This data still lacks essential information such as subtyping and genome location. To help minimize these problems we developed a system for automated analysis from GenBank data. The tool performs sequence map according to HXB2 and subtyping by comparison with subtype reference sequences. This process uses Needleman-Wusch and Smith-Waterman respectively. All 582,678 sequences were mapped in 5 days and 14 hours and subtyped in 1 day and 7 hours with our algorithm, while the original approach was estimated to finish in 36 and 97 years respectively. Our tool was able to analyse the massive data in a reliable time. No current subtyping tool can analyse this high-throughput data. Our results showed that pol and gag genes were the most prevalent genes on the dataset, and could be explained because treatment and subtyping are based on these genes. Moreover, the structural genes were most prevalent, with 66.41%. This highlighted the low representation of regulatory genes on available data. The subtyping results showed that the subtype B was most frequent, with 45.96%. The recombinants together represent 43.37%. Furthermore, subtype C presented only 4.12% and the other pure subtypes less than 4%. Also, the geographical data was recovered from database and USA presented higher frequency, with 24.50%, showing a significant country bias. Our results present a new HIV subtype distribution with the most complete and recent dataset.Herein, we presented a new user friendly software for massive data analysis of viruses. This software is able to analyse highly mutational virus data, such as HCV and HIV in reliable time. Further, severe country bias raises questions regarding world subtype distribution. The analysis of all sequences from HIV provides new epidemy insights about subtypes and country distribution. / O HIV infecta mais de 40 milh?es de pessoas no mundo e ? considerado pela Organiza??o Mundial de Sa?de como uma pandemia. A doen?a associada n?o possui cura cl?nica. Novas an?lises e informa??es podem ajudar no desenvolvimento de novos tratamentos e vacinas. No entanto, o conjunto de dados sobre o agente etiol?gico dispon?vel ? vasto, contando com mais de 500 mil sequ?ncias no GenBank. Este conjunto de dados ainda carece de informa??es essenciais, como subtipo viral e localiza??o no genoma de refer?ncia. Para auxiliar na minimiza??o destes problemas, desenvolvemos um sistema para an?lise dos dados dispon?veis no GenBank. A ferramenta realiza o mapeamento de acordo com o genoma refer?ncia HXB2 e a subtipagem comparando as sequ?ncias de refer?ncia dos subtipos. Estes processos utilizam os algoritmos de Needleman-Wusch e Smith-Waterman respectivamente. Todas as 582.678 sequ?ncias foram mapeadas em 5 dias e 14 horas, e subtipadas em 1 dia e 7 horas com nosso algoritmo. Enquanto a abordagem original estima terminar em 36 e 97 anos respectivamente. Nenhuma ferramenta de subtipagem dispon?vel atualmente ? capaz de analisar esta quantidade de dados. Nossos resultados mostraram que os genes gag e pol s?o mais prevalentes no conjunto de dados. O que pode ser explicado pelo fato de t?cnicas de avalia??o de resist?ncia aos antirretrovirais e subtipagem serem baseadas nesses genes. Al?m disso, os genes estruturais exibiram uma preval?ncia absoluta de 66.41%. Isto evidencia a pouca representatividade de genes regulat?rios no conjunto de dados. Os resultados da subtipagem mostram que o subtipo B ? o mais frequente com 45,96% de preval?ncia. Os recombinantes, combinados, representam 43.37%. Ademais, o subtipo C apresentou apenas 4,12% de preval?ncia absoluta e outros subtipos puros menos de 4%. Al?m disso, dados geogr?ficos foram recuperados do banco de dados. Os Estados Unidos representam a maior frequ?ncia de sequ?ncias submetidas, com 24,5% de todos os dados dispon?veis. Nossos resultados apresentam uma nova distribui??o genot?pica do HIV, com o conjunto de dados mais recente e completo. Neste trabalho apresentamos um novo software para an?lise das sequ?ncias nucleot?dicas do HIV dispon?veis no GenBank. Este software ? capaz de analisar dados de v?rus com elevado comportamento mutacional como HIV e HCV em um curto espa?o de tempo. A an?lise de todas as sequ?ncias do HIV dispon?veis no GenBank oferece um novo ponto de vista sobre a epidemia, distribui??o de subtipos e geogr?fica.
214

Coleta, caracteriza??o e avalia??o preliminar de acessos de Stylosanthes spp.

Oliveira, Ronaldo Sim?o de 31 January 2015 (has links)
Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-07-11T23:39:34Z No. of bitstreams: 1 Tese-Ronaldo SOliveira_2015.pdf: 1819214 bytes, checksum: da69b4c584e3e9304788bb2b45091d51 (MD5) / Made available in DSpace on 2016-07-11T23:39:34Z (GMT). No. of bitstreams: 1 Tese-Ronaldo SOliveira_2015.pdf: 1819214 bytes, checksum: da69b4c584e3e9304788bb2b45091d51 (MD5) Previous issue date: 2015-01-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The aim of this work was to organize a Forage Germplasm Bank in the State University of Feira de Santana-BA (BGF-UEFS), to carry out a survey of the occurrence of species of Stylosanthes and do pre-breeding studies in a sample of accessions collected in the Semiarid of Bahia from 2008 and 2014. Five collection expeditions in different Semiarid regions of the State was done as an attempt to rescue the maximum genetic variability available. For the pre-breeding work, 25 accessions of Stylosanthes plus a control were utilized. The methods of analysis of variance (ANOVA) and Restricted Maximum Likelihood/Best Linear Unbiased Prediction (REML/BLUP) were used. The genetic parameters were estimated in order to choose the most precise method to select the best individuals for a breeding program. Finally, it was studied the genetic diversity in order to choose the best combinations to develop segregating populations in a breeding program of Stylosanthes. In total, 225 accessions of Stylosanthes spp. were rescued in the state of Bahia, being 61 from de Northeast of the state, 58 from the Mid North, 59 from S?o Francisco Valley, 24 from the Mid South and 23 from the Far West. The estimates of the genetic parameters showed that the methods (ANOVA and REML/BLUP) presented divergent values. The REML/BLUP estimated the genetic values with better accuracy, increased the efficiency of selection and therefore decreased the cost of a given breeding program that has the objective to increase the mass production in Stylosanthes. In a sample of the analyzed accessions, four species were found (S. scabra, S. humilis, S. viscosa and S. capitata). Genetic variability among the accessions and the clusters of Tocher and UPGMA were basically defined by the botanical species and some of them were superior for mass production (BGF08-16 and BGF06-15) and for forage quality (BGF08- 006 and BGF08-007). / O objetivo deste trabalho foi organizar um Banco de Germoplasma de Forrageiras da Universidade Estadual de Feira de Santana, BA (BGF-UEFS), realizar o levantamento da ocorr?ncia de esp?cies do g?nero Stylosanthes e conduzir um estudo de Pr?-melhoramento em uma amostra de acessos coletados no Semi?rido baiano entre os anos de 2008 a 2014. Foram realizadas cinco expedi??es de coleta em diferentes regi?es do Estado procurando resgatar o m?ximo da variabilidade gen?tica dispon?vel. Para os estudos de pr?-melhoramento foram utilizados 25 acessos de Stylosanthes mais uma testemunha. Por meio dos m?todos de an?lise de vari?ncia (ANOVA) e M?xima Verossimilhan?a Restrita/Melhor Predi??o Linear n?o Viesada (REML/BLUP) foram estimados os par?metros gen?ticos, procurando indicar qual o m?todo mais preciso na sele??o dos melhores indiv?duos para um programa de melhoramento. Por fim, realizou-se o estudo da diversidade gen?tica no intuito de indicar as melhores combina??es para formar as popula??es segregantes do programa de melhoramento gen?tico dessa forrageira. Foram resgatados 225 acessos de Stylosanthes spp. de cinco mesorregi?es da Bahia, dos quais 61 foram do Nordeste baiano, 58 do Centro Norte baiano, 59 oriundos do Vale S?o Franciscano da Bahia, 24 resgatados no Centro Sul Baiano e 23 acessos no extremo Oeste Baiano. A estimativa dos par?metros gen?ticos mostrou que os m?todos (ANOVA e REML/BLUP) apresentaram valores divergentes sendo que o REML/BLUP estima os valores gen?ticos com maior acur?cia, aumenta a efici?ncia da sele??o e consequentemente diminui os custos dos programas de melhoramento gen?tico que objetivam aumentar a produ??o de massa em Stylosanthes. Em uma amostra de acessos analisada foram identificadas quatro esp?cies (S. scabra, S. humilis, S. viscosa e S. capitata). Foi observada variabilidade gen?tica entre os acessos avaliados e os agrupamentos de Tocher e UPGMA foram definidos quase que pela identifica??o bot?nica das esp?cies, sendo que os acessos BGF08-16 e BGF06-15 se mostraram superiores para produ??o de massa e os acessos BGF08- 006 e BGF08-007 para a qualidade de forragem.
215

Demonstrace a proměření "next-gen" grafických API / Demonstration and Benchmarking of Next-Gen Graphics APIs

Mainuš, Matěj January 2016 (has links)
The goal of master’s thesis was to demonstrate and benchmark peformance of Mantle and Vulkan APIs with different optimization methods. This thesis proposes a rendering toolkit with optimization methods based on parallel command buffer generating, persistent staging buffers mapping, minimal pipeline configuration and descriptor sets changing, device memory pre-allocating with managing and sharing between multiple resources. The result is reference implementation that could render dynamic scene with thousands of objects in real time.
216

Eine Analyse ausgewählter genomischer Varianten im FIGF- und ACE2-Gen und deren Bedeutung in der molekularen Pathogenese intrakranieller Aneurysmen: Eine Analyse ausgewählter genomischer Varianten im FIGF- und ACE2-Gen und deren Bedeutung in der molekularen Pathogenese intrakranieller Aneurysmen

Leonhardt, Mareike 22 September 2009 (has links)
In der vorliegenden Arbeit untersuchten wir an einer europäischen Population ausgewählte Polymorphismen zweier Gene auf eine Assoziation zu IA. Beide Gene FIGF und ACE2 sind lokalisiert auf Chromosom Xp22 und stellen damit positionelle Kandidatengene dar, aber auch funktionell sind sie von Interesse, da sie v.a. in Prozesse des Gefäßwachstums (FIGF) und der Blutdruckregulierung (ACE2) involviert sind; Vorgänge also, die möglicherweise in die pathophysiologische Erklärung der IA Entstehung mit hineinspielen. In keinem der insgesamt neun analysierten Polymorphismen konnten wir jedoch eine signifikante Assoziation zu IA finden. Auch eine Analyse möglicher intra- und intergenetischer Haplotypen aller untersuchten Varianten erbrachte kein signifikantes Ergebnis.
217

The impact of social media influencers on the purchase intention of Tech gadgets among Gen Z and Y : Sweden

Meglaj, Valentina, Zafar, Naqash January 2022 (has links)
No description available.
218

PATHOGENITÄTSVERGLEICH VON SALMONELLA TYPHIMURIUM DT104 - WILDTYP UND SALMONELLA TYPHIMURIUM - DELETIONSMUTANTEN (sseD::aphT & invC::aphT) IN PERSISTENT INFIZIERTEN SCHWEINEN: PATHOGENITÄTSVERGLEICH VON SALMONELLATYPHIMURIUM DT104 - WILDTYP UND SALMONELLATYPHIMURIUM - DELETIONSMUTANTEN (sseD::aphT &invC::aphT) IN PERSISTENT INFIZIERTEN SCHWEINEN

Sigmarsson, Haukur Lindberg 10 July 2012 (has links)
ZUSAMMENFASSUNG Haukur Lindberg Sigmarsson PATHOGENITÄTSVERGLEICH VON SALMONELLA TYPHIMURIUM DT104 - WILDTYP UND SALMONELLA TYPHIMURIUM - DELETIONSMUTANTEN (sseD::aphT & invC::aphT) IN PERSISTENT INFIZIERTEN SCHWEINEN Salmonella (S.) Typhimurium DT104 ist ein gram-negatives Bakterium. Es weist keine Wirtsspezifität auf und gilt als Zoonoseerreger. Jährlich erkranken daran allein in Deutschland mehrere Tausend Menschen unter dem Bild einer schwerwiegenden Diarrhö mit zum Teil tödlichem Ausgang. Das Schwein gilt als eines der Reservoire für S. Typhimurium DT104 des Menschen. S. Typhimurium DT104 gelangt über vom Schwein stammende Produkte in den menschlichen Verzehr. Die Kontrolle von S. Typhimurium DT104 einschließlich effektiver Eradikationsmassnahmen in unseren Schweinebeständen ist deshalb von entscheidender Bedeutung, um den Eintrag dieses Bakteriums in die menschliche Nahrungskette wenn möglich zu eliminieren. Dafür ist das Verständnis über S. Typhimurium DT104 einschließlich der Kenntnis seine Pathogenitätseigenschaften notwendig. Ziel dieser Arbeit waren Untersuchungen zur Pathogenität von S. Typhimurium DT104. Dabei wurden der Wildstamm mit zwei seiner Deletionsmutanten (sseD::aphT und invC::aphT) verglichen. Die Untersuchungen erfolgten im Infektionsversuch an insgesamt 25 sechs Wochen alten männlichen Schweinen, die in einem vollklimatisierten Versuchsstall gehalten wurden. Den Tieren wurde im Anschluss an eine einwöchige Akklimatisierungsphase eines der nachfolgenden Stämme von S. Typhimurium DT104 oral in einer Konzentration von 1 x 1011 KBE verabreicht: Wildtyp (n = 8 Schweine), Deletionsmutante seeD::aphT (n = 8) und Deletionsmutante invC::aphT (n = 9). Bei den Mutanten handelt es sich um Varianten von S. Typhimurium DT104, die an den entsprechenden Abschnitten des Bakteriumgenoms (d.h. sseD-Gen bzw. invC-Gen) deletiert wurden. SseD regelt die Überlebensfähigkeit von S. Typhimurium in Makrophagen, invC dessen Invasionsvermögen. Im Mäusemodel war die Pathogenität beider Mutanten deutlich vermindert. Nach der Infektion schloss sich ein 20 tägiger Beobachtungszeitraum an, während dessen nachfolgend genannte Parameter erfasst bzw. Proben genommen wurden: klinische Symptome (Allgemeinbefinden, Erbrechen, Durchfall, Futteraufnahme, Atmung, Temperatur); Blutentnahme für Erstellung des weißen Blutbildes; Kotentnahme zum Nachweis der Ausscheidung von S. Typhimurium. Einen Tag nach Ende der Beobachtung wurden die Tiere getötet und Proben von insgesamt 15 Organen (unter anderem Tonsille; Colon und Caecum sowie dazugehörige Lymphknoten; Leber; Milz; Muskulatur) genommen. Kot sowie Gewebeproben wurden kulturell und wenn positiv auch mittels PCR untersucht. Alle mit dem Wildtyp infizierten Schweine wurden mehr oder weniger stark krank. Häufig zeigten erkrankte Schweine zeitgleich mehrere Krankheitssymptome (z. B. Erbrechen und Durchfall). Die Erkrankung hielt über mehrere Tage an. Im Vergleich dazu waren die Krankheitssymptome der Tiere, die mit Mutanten infiziert wurden, mild. Nur wenige Tiere erkrankten und dann auch nur kurzzeitig. Gewöhnlich war nur einer der erfassten Parameter verändert. Typische Veränderungen im weißen Blutbild waren nur bei Wildtyp-infizierten Tieren zu beobachten, während Tiere beider Mutanten kaum auf die Infektion reagierten. Alle 25 infizierten Tiere schieden S. Typhimurium mit dem Kot während der ersten Woche post inocculationem aus. Danach wurden in allen drei Gruppen etwa gleichviel intermittierende Ausscheider beobachtet. Zwischen 65 und 67 % der Gewebeproben der mit dem Wildtyp und mit der sseD::aphT-Mutante infizierten Tiere waren sowohl in der Kultur als auch mittels PCR S. Typhimurium positiv, während dieser Anteil nach Infektion mit invC::aphT nur 49 % betrug. Alle Tiere waren in Mandibularlymphknoten und im Colon positiv, während S. Typhimurium nur selten in Muskulatur und Leber nachzuweisen war. Die Ergebnisse dieser Arbeit bestätigen, dass Infektionen mit dem Wildtyp von S. Typhimurium zu einer schweren Erkrankung führen können. Gleichzeitig konnte gezeigt werden, dass beide in dieser Arbeit verwendeten Mutanten weniger krankmachend sind. Es muss davon ausgegangen werden, dass die Deletionen in den sseD bzw. invC-Bereichen tatsächlich zu Veränderungen bestimmter Eigenschaften geführt haben, die Teil der Pathogenitätsmechanismen für das Schwein sind. Im Unterschied zur Maus war sseD beim Schwein allerdings invasiv. Es kann vermutet werden, dass die durch sseD kodierten Pathogenitätseigenschaften von S. Typhimurium bei der Maus anders als beim Schwein wirken und somit unterschiedliche Bedeutung haben. Da die invC::aphT-Mutante jedoch und wie erwartet wesentlich schwächer als Wildtyp und sseD::aphT invadierte ist davon auszugehen, dass die Deletion im invC Bereich das Invasionsvermögen der Mutante beim Schwein ähnlich wie bei der Maus verringerte.
219

The Role of Mentorship in Developing Leadership Ready Gen X and Gen Y Female Leaders

Steele Flippin, Candace January 2016 (has links)
No description available.
220

Customers perception of Artificial Intelligence as Chatbots in CRM

Kuylenstierna, Elsa, Trägårdh, Hanna January 2021 (has links)
ABSTRACT  Title: Customers perception of Artificial Intelligence as Chatbots in CRM  Subject: Bachelor thesis in business administration, 15 hp  Authors: Hanna Trägårdh & Elsa Kuylenstierna  Supervisor: Klaus Solberg Söilen  Examiner: Ulf Aagerup  Keywords: Artificial intelligence, Chatbots, Customer Relationship Management, Generation Z, Generation Y  Purpose: The purpose of this study is to determine the perception Swedish customers from Gen Z and Gen Y have of companies using chatbots in customer relationship management. Furthermore the study will analyze if the different generational groups perceive chatbots in different ways. The study also focuses on finding out what role chatbots play in terms of CRM.  Methodology: In this study a deductive research approach was used where the empirical study was collected through a survey. The survey had 212 respondents, 100 of them were between 15 and 25 years old and 112 were between 26 and 44 years old.  Conclusion: Gen Z and Gen Y have similar opinions about how they perceive chatbots. Both Gen Z and Gen Y prefer communicating with a human since chatbots are not living up to their expectations. However, they are optimistic that chatbots have the potential to improve customer services to the better. Companies need to make sure that chatbots create value for customers and not only for companies themselves. Chatbots need to keep developing and make progress to be beneficial for customers to use.  Implications: This study can contribute with new perspectives about chatbots and customer relationships that can be a big advantage for companies when implementing chatbots for their business. The study brings attention to the unexplored issue of Gen Z and Gen Y’s perception in this matter. This study can also be helpful for further research within the subject area.

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