Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 161 for “"imprinting"”.
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On Immunological Imprinting
… mutated and formed new epitopes. Immunological imprinting (formerly known as original antigenic sin) describes the propensity for memory B responses elicited after primary exposure to dominate secondary responses to mutated virus variants as opposed to eliciting new responses against new …
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Aversive Olfactory Imprinting in Caenorhabditis Elegans
… among which the most evocative example is imprinting. Imprinting was first described in newly hatched geese that form a lasting attachment to the first moving object they see. As observed in many animal species, imprinting is a process in which a sensory cue presented early in animal's life …
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Molecular imprinting and recognition in heteropolymer gels
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1998.
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Regulation of the Kcnq1ot1 Imprinting Domain in Mouse
Genomic imprinting is an epigenetic mechanism that controls gene expression based on parental-origin of an allele. The Kcnq1ot1 imprinting cluster consists of an imprinting control region (ICR), the Kcnq1ot1 ncRNA, and maternally expressed protein-coding genes. Truncation of the Kcnq1ot1 ncRNA or …
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Genetics of initial imprinting responses: selection, and heterosis
… traits and supports the idea that they indicate imprinting tendencies. Time of day tested, sex, hatch, mating type, developmental age, and 24-hr body we1ght were considered independent variables influencing the behavior traits. Multiple regressions showed that the initiation of responsiveness is …
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Molecular imprinting and ionic crossliking in polymer gels
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Dynamics of DNA methylation and genomic imprinting in arabidopsis
… ranging from transposon silencing to genomic imprinting. In plants, DNA methylation is both mitotically and meiotically heritable, and changes in DNA methylation can be generationally stable and have long-lasting consequences. This thesis aims to improve understanding of DNA methylation …
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The role of imprinting in embryonic development and tumorigenesis
Imprinting is a mammalian adaptation that results in the mono-allelic expression of a subset of genes depending on their parental origin. It is believed that DNA methylation marks are responsible for maintaining imprinted gene expression patterns. The 'parental conflict' hypothesis was proposed to …
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A genetic investigation of the establishment of genomic imprinting
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1997.
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The effects of effort and day of exposure on imprinting
… to discrimination than to recognition of the imprinting object.
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Cross-Linked Polybenzyl Ether and Polyglycerol Dendrimers for Monomolecular Imprinting
Dendrimers containing a glycoside core were synthesized by direct coupling of a acid chloride dendron to a glycoside or by attachment of an azide dendron to a core containing alkyne groups using copper-catalyzed 1,3-dipolar cycloaddition. The glycoside dendrimers displayed chiral activity that …
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Gene expression and imprinting in mice cloned by nuclear transfer
… the expression of some imprinted genes. Because imprinting is normally established in the gametes and maintained in the early embryo, imprinted genes are likely to be resistant to reprogramming after nuclear transfer. We have examined imprinted gene expression in neonatal cloned mice derived from …
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Designing and Introducing New Startegies to Optimize the Molecualr Imprinting Process
… the utility and efficiency of the molecular imprinting process. Our strategy is to design a multi-functional monomer that can form intramolecular hydrogen bonds. The purpose of this design is to significantly reduce the number of unwanted background sites in the polymer matrix, which limits …
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Oct4 and Sox2 regulate methylation at the Igf2/H19 imprinting control region
… depends on parental-specific methylation of an imprinting control region (ICR). Although CTCF sites maintain the absence of DNA methylation on maternal ICRs after fertilization, some Beckwith-Wiedemann patients showed maternal ICR methylation that correlated with mutations in one of the pair of …
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Hyperbranched polymers and Haag type dendrimers for the molecular imprinting of polymers
A molecularly imprinted polymer was synthesized using both hyperbranched polyglycerol and Haag type polyether dendrons with estradiol as a core. The attachment of the polyether dendron created a dendrimer that had 64 allyl groups available for crosslinking. Completion of the crosslinking of the …
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Deciphering the genetic and epigenetic basis of human imprinting and chromatin disorders
… patterns, including disturbances in genomic imprinting, have been linked to congenital imprinting disorders as well as various disease conditions, including cancer, chromatin disorders, and neurodevelopmental disorders. Some imprinting disorders, however, result in alterations in multiple …
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LASER SHOCK IMPRINTING OF METALLIC NANOSTRUCTURES AND SHOCK PROCESSING OF LOW-DIMENSIONAL MATERIALS
Laser shock imprinting (LSI) is proposed and developed as a novel ultrafast room-temperature top-down technique for fabricating and tuning of plasmonic nanostructures, and processing of one-dimensional semiconductor nanowires and two-dimensional crystals. The technique utilizes a shock pressure …
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