• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • Tagged with
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 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.
1

The Value of Partnerships as a Mechanism for Systems Change: The Florida Experience (1974-2006)

Massey, Lori Marie 24 March 2007 (has links)
The value of collaborative regional professional development partnerships as the mechanism for implementing a Comprehensive System of Personnel Development (CSPD), a mandate of the Individuals with Disabilities Education Act (IDEA) 1997, in one state was investigated. The historical organizational case study examined this issue from the perspectives of those initially and currently involved with regional professional development partnership implementation. Participants included individuals representing three different perspectives (i.e., state education agency, institutions of higher education, and local education agency) A qualitative case study research design was used to gain in-depth information from varied sources about participants' views of Florida's system of personnel development prior to the implementation of regional professional development partnerships, as well as the perceived value of the regional professional development partnerships from those who were currently involved. Data sources included interviews and a review of relevant documents. Data analysis included the process of inductive analysis which allowed themes of the study to emerge from the data. Conclusions drawn from the study's findings included: (1) the critical importance of leadership, (2) the importance of relationships, (3) the developmental nature of partnerships, (4) readiness, roles, and responsibilities, (5) benefits and barriers, and (6) the importance of institutional memory and active involvement. / Ph. D.
2

Estudo da regulação do gene cspD de Caulobacter crescentus. / The study of cspD gene regulation in Caulobacter crescentus.

Silva, Carolina Antunes do Prado Tavares 28 November 2011 (has links)
CspD é uma das quatro proteínas de choque frio de Caulobacter crescentus, sendo maior que as outras CSPs por possuir dois domínios de choque frio, e tem seu papel na célula ainda desconhecido. O objetivo deste trabalho foi identificar e caracterizar os fatores in cis e in trans envolvidos na regulação da expressão do gene cspD em C. crescentus. Neste trabalho foi visto que a expressão de cspD é induzida pela carência de glicose no meio, mas não pela carência de nitrogênio. Esta indução é dependente do sinalizador ppGpp, indicando que ppGpp está envolvido na sinalização de carência de carbono. Um regulador de resposta de um sistema de dois componentes (SpdR) foi identificado como responsável pela indução em fase estacionária, sendo fosforilado pela histidina quinase cognata SpdS. Através de ensaios de EMSA e DNAseI footprinting pudemos verificar que a proteína SpdR se liga em uma sequência repetida invertida no promotor de cspD, e que essa ligação é dependente da fosforilação no resíduo de aspartato na posição 64 da proteína. Foi construído um mutante nulo do gene SpdR e este foi testado quanto à resistência a estresse oxidativo causado por H2O2 e viabilidade em fase estacionária; o mutante não apresentou diferença na resposta em relação à linhagem selvagem. / CspD is one of the four cold shock proteins of Caulobacter crescentus being larger than the other ones by possessing two cold shock domains, and its cellular role is still unknown. The aim of this work was to identify and characterize factors in cis and in trans involved in regulation of cspD expression in C. crescentus. In this work we determined that cspD expression is induced by glucose starvation but not by nitrogen starvation. This induction is dependent on the signalling molecule ppGpp, indicating that it is involved in carbon starvation signaling. A response regulator of a two-component system (SpdR) was identified as responsible for stationary phase induction, being phosphorylated by the cognate histidine kinase SpdS. EMSA and DNAseI footprinting assays showed that the SpdR protein binds to an inverted repeat at the cspD promoter, and that this binding is dependent on phosphorylation at the aspartate residue at position 64. A null spdR mutant strain was constructed and its resistance to H2O2 and stationary phase viability were determined, however the mutant showed no difference in response when compared to the wild type.
3

Estudo da regulação do gene cspD de Caulobacter crescentus. / The study of cspD gene regulation in Caulobacter crescentus.

Carolina Antunes do Prado Tavares Silva 28 November 2011 (has links)
CspD é uma das quatro proteínas de choque frio de Caulobacter crescentus, sendo maior que as outras CSPs por possuir dois domínios de choque frio, e tem seu papel na célula ainda desconhecido. O objetivo deste trabalho foi identificar e caracterizar os fatores in cis e in trans envolvidos na regulação da expressão do gene cspD em C. crescentus. Neste trabalho foi visto que a expressão de cspD é induzida pela carência de glicose no meio, mas não pela carência de nitrogênio. Esta indução é dependente do sinalizador ppGpp, indicando que ppGpp está envolvido na sinalização de carência de carbono. Um regulador de resposta de um sistema de dois componentes (SpdR) foi identificado como responsável pela indução em fase estacionária, sendo fosforilado pela histidina quinase cognata SpdS. Através de ensaios de EMSA e DNAseI footprinting pudemos verificar que a proteína SpdR se liga em uma sequência repetida invertida no promotor de cspD, e que essa ligação é dependente da fosforilação no resíduo de aspartato na posição 64 da proteína. Foi construído um mutante nulo do gene SpdR e este foi testado quanto à resistência a estresse oxidativo causado por H2O2 e viabilidade em fase estacionária; o mutante não apresentou diferença na resposta em relação à linhagem selvagem. / CspD is one of the four cold shock proteins of Caulobacter crescentus being larger than the other ones by possessing two cold shock domains, and its cellular role is still unknown. The aim of this work was to identify and characterize factors in cis and in trans involved in regulation of cspD expression in C. crescentus. In this work we determined that cspD expression is induced by glucose starvation but not by nitrogen starvation. This induction is dependent on the signalling molecule ppGpp, indicating that it is involved in carbon starvation signaling. A response regulator of a two-component system (SpdR) was identified as responsible for stationary phase induction, being phosphorylated by the cognate histidine kinase SpdS. EMSA and DNAseI footprinting assays showed that the SpdR protein binds to an inverted repeat at the cspD promoter, and that this binding is dependent on phosphorylation at the aspartate residue at position 64. A null spdR mutant strain was constructed and its resistance to H2O2 and stationary phase viability were determined, however the mutant showed no difference in response when compared to the wild type.

Page generated in 0.021 seconds