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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 51 to 60 of 4475 (0.082 seconds)Spelling suggestions: "subject:"ehe 4elements"" "subject:"ehe 1elements""
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Miniature inverted repeat transposable elements in rice - origin and functionYang, Guojun 30 September 2004 (has links)
Transposable elements (TEs) are interspersed repetitive sequences that are present in most genomes. Miniature inverted repeat transposable elements (MITEs) are the most numerous Class II elements in higher eukaryotes. Little is known about their origin, transposition and function. In this study, three novel MITE families (Kiddo, MDM1 and MDM2) were identified in the rice genome. They bear terminal inverted repeats (TIRs) and show target site duplications (TSDs) at the insertion sites. Each family is present in hundreds of copies with length that range from 200 bp to 400 bp. An evolutionary relationship between Mutator elements and MDM1 and MDM2 family was established. The absence of an observed transposition event, together with the mutated ancestral elements identified by in silico analysis, led to a conclusion that Kiddo and its autonomous elements are not presently active.
To overcome laborious and time consuming manual analysis of MITEs on a genomic scale, MAK, a computational tool kit, was developed to automatically retrieve MITE sequences, their neighboring genes and ancestral elements from genome sequences. MAK has been functionally tested and is now available to the research community.
Studies on the effect of MITE (Kiddo and MDM1) insertions into a rice ubiquitin (rubq2) promoter revealed a two-edged role of MITEs on gene regulation. While Kiddo and MDM1 contribute ~40% to rubq2 promoter activity, they also induce progressive silencing of this promoter. The evolutionary implications of the two-edged role of MITEs in gene regulation are discussed.
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| 52 |
Trace element chemistry of aging marine detritus derived from coastal macrophytesRice, Donald Lester 05 1900 (has links)
No description available.
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| 53 |
New methods for improving sensitivity in trace analysisHornstein, J. Virgil (Julius Virgil) 05 1900 (has links)
No description available.
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| 54 |
Investigations in the field of trace analysisMyers, Gary Lee 08 1900 (has links)
No description available.
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| 55 |
Uranium hexafluoride actinide transmutation reactors : preliminary design and analysisWan, Pak Tai 12 1900 (has links)
No description available.
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| 56 |
Sintering of boron carbideLee, Hyukjae 08 1900 (has links)
No description available.
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| 57 |
An ultrastructural and immunochemical study of sieve elementsSmith, L. M. January 1984 (has links)
No description available.
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| 58 |
Genomic analysis of the conjugative integrating element R391 from Providencia rettgeriBöltner, Dietmar January 2003 (has links)
No description available.
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| 59 |
Studies of connective tissue abnormalities in the skeleton and cardiovascular system of copper deficient ratsFarquharson, Colin January 1989 (has links)
No description available.
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| 60 |
Microextrusion of barium titanate for PTCR applicationsWegmann, Markus Rolf January 2002 (has links)
No description available.
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