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You searched for subject:(CoTb). Showing records 1 – 3 of 3 total matches.

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Universidade Nova

1. Freitas, Carolina Duarte de. Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis.

Degree: 2015, Universidade Nova

A superfície dos esporos bacterianos é constituída por uma estrutura multi-proteica, denominada manto, com funções de proteção e de interação com o meio circundante. CotB é um componente abundante do manto do esporo de Bacillus subtilis. Durante a formação do manto, a proteína CotB, de 46 kDa (CotB-46), sofre uma modificação pós-traducional, que a converte numa espécie com uma mobilidade eletroforética de 66 kDa (CotB-66). Outras duas proteínas do manto, CotH e CotG, são necessárias para a formação de CotB-66. CotH é uma proteína morfogenética essencial para a montagem do manto, e um homólogo estrutural de cinases Ser/Thr de tipo eucariota. CotB, por seu lado, possui quatro repetições de uma sequência rica em serinas/lisinas/argininas na sua metade Cterminal, enquanto que a metade N-terminal contém dois domínios Sm-like, associados normalmente a interações RNA-RNA e RNA-proteína. A super-expressão de cotB em E. coli resulta numa proteína de 46 kDa, mas a co-expressão de cotB com cotG e cotH leva à produção de uma forma de CotB de 66kDa. Na ausência de CotG ou de CotH ou na presença de uma forma inativa de CotH, com a substituição D228Q no seu centro ativo putativo, não se verifica a formação de CotB-66. CotH sofre auto-fosforilação e é insensível ao inibidor de largo espectro staurosporina. Além disso, mostramos que CotB-46 é fosforilado diretamente por CotH in vitro. Descobrimos que a substituição D228Q resulta em alterações na composição, estrutura e propriedades do manto que se aproximam daquelas causadas por uma mutação de eliminação do gene. Mostramos que a modificação de CotB in vivo é dependente de CotG e da atividade de cinase de CotH. Sugerimos que durante a formação do manto de B. subtilis CotH fosforila CotB na sua metade C-terminal, usando CotG como co-fator. Advisors/Committee Members: Henriques, Adriano, Serrano, Mónica.

Subjects/Keywords: CotB; Manto; Esporo; Fosforilação; B. subtilis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Freitas, C. D. d. (2015). Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/14150

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Freitas, Carolina Duarte de. “Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis.” 2015. Thesis, Universidade Nova. Accessed April 17, 2021. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/14150.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Freitas, Carolina Duarte de. “Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis.” 2015. Web. 17 Apr 2021.

Vancouver:

Freitas CDd. Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis. [Internet] [Thesis]. Universidade Nova; 2015. [cited 2021 Apr 17]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/14150.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Freitas CDd. Poli-fosforilação de um componente estrutural do esporo de Bacillus subtilis. [Thesis]. Universidade Nova; 2015. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/14150

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Merhe, Alaa el dine. Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb.

Degree: Docteur es, Chimie-physique, 2018, Sorbonne université

Dans cette thèse, nous rapportons l'évolution temporelle du premier et du troisième ordre de la diffusion magnétique d'un film CoTb amorphe après une excitation femtoseconde. Ces résultats sont obtenus en appliquant une diffusion résonnants de rayons X aux petits angles au seuil d'absorption magnétique de Co M3 via des expériences de pompe sonde répétitives. Une différence de comportement entre le premier et le troisième ordre de diffusion a été observée après 3,5 ps, où une seconde baisse de l'intensité du troisième ordre apparaît. En utilisant des modèles appropriés, nous montrons que cette différence est due à une augmentation de la largeur de la paroi du domaine séparant deux domaines opposés. Nous supposons que cet élargissement de la paroi est généré par une variation de l'anisotropie uniaxiale hors plan due au réchauffement thermique du réseau par l'impulsion laser femtoseconde. Cette interprétation est vérifiée en mesurant l’anisotropie uniaxiale en fonction de la température de chauffage en effectuant des mesures statiques SQUID-VSM.

In this thesis, we report the time evolution of first and third order of magnetic scattering from an amorphous CoTb film after a femtosecond excitation. These results are obtained by applying a resonant small angle X ray scattering at the Co magnetic absorption edge M3 via a repetitive pump probe experiments. Difference in behaviours between the first and third scattering orders was observed after 3.5 ps where a second drop of the third order intensity appears. Using suitable models, we show that this difference is due to an increase of the domain wall width separating two opposite domains. We suppose that this wall broadening is generated by the variation of the out of plane uniaxial anisotropy due to the thermal heating of the lattice by the femtosecond laser pulse. This interpretation is verified by following the uniaxial anisotropy as function of the heating temperature by doing static SQUID-VSM measurements

Advisors/Committee Members: Lüning, Jan (thesis director), Vodungbo, Boris (thesis director).

Subjects/Keywords: Désaimantation ultrarapide; CoTb; Paroi de domaine; Diffusion magnétique résonnante; Anisotropie uni-axiale; Transport super diffusif; Ultrafast Demagnetization; CoTb; Domain wall; Resonant magnetic scattering; Uniaxial anisotropy; Supper diffusive transport

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Merhe, A. e. d. (2018). Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb. (Doctoral Dissertation). Sorbonne université. Retrieved from http://www.theses.fr/2018SORUS143

Chicago Manual of Style (16th Edition):

Merhe, Alaa el dine. “Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb.” 2018. Doctoral Dissertation, Sorbonne université. Accessed April 17, 2021. http://www.theses.fr/2018SORUS143.

MLA Handbook (7th Edition):

Merhe, Alaa el dine. “Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb.” 2018. Web. 17 Apr 2021.

Vancouver:

Merhe Aed. Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb. [Internet] [Doctoral dissertation]. Sorbonne université; 2018. [cited 2021 Apr 17]. Available from: http://www.theses.fr/2018SORUS143.

Council of Science Editors:

Merhe Aed. Ultrafast modification of the magnetic anisotropy in a CoTb alloy : Modification ultrarapide de l'anisotropie magnétique dans un alliage CoTb. [Doctoral Dissertation]. Sorbonne université; 2018. Available from: http://www.theses.fr/2018SORUS143

3. LIN FEIKAI. A study on CoCrPtB/CoTb magnetically coupled media.

Degree: 2006, National University of Singapore

Subjects/Keywords: CoTb; CoCrPtB; thermal stability; exchange coupling; perpendicular recording; thin film

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

FEIKAI, L. (2006). A study on CoCrPtB/CoTb magnetically coupled media. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15052

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

FEIKAI, LIN. “A study on CoCrPtB/CoTb magnetically coupled media.” 2006. Thesis, National University of Singapore. Accessed April 17, 2021. http://scholarbank.nus.edu.sg/handle/10635/15052.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

FEIKAI, LIN. “A study on CoCrPtB/CoTb magnetically coupled media.” 2006. Web. 17 Apr 2021.

Vancouver:

FEIKAI L. A study on CoCrPtB/CoTb magnetically coupled media. [Internet] [Thesis]. National University of Singapore; 2006. [cited 2021 Apr 17]. Available from: http://scholarbank.nus.edu.sg/handle/10635/15052.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

FEIKAI L. A study on CoCrPtB/CoTb magnetically coupled media. [Thesis]. National University of Singapore; 2006. Available from: http://scholarbank.nus.edu.sg/handle/10635/15052

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.