Pincas Oticas
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Localized beams in optical tweezers with conventional and metamaterial particles / Feixes localizados em pinças opticas com particulas convencionasi e metamateriais
In this thesis, we explore some applications of localized beams in FSO - Free Space Optics - and optical tweezers, greater emphasis been given to the second one. For FSO, we show that it is possible to choose the desired longitudinal intensity pattern by using optical elements adequately modeled in their phase functions: the axicons. In this way, these beams
Publicado em: 2009
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2. Estudo das propriedades eletricas das hemacias utilizando pinça optica / Study of electrical properties of red blood cell using optical tweezers
The red blood cell (RBC) membrane contains proteins and glycoproteins embedded in a fluid lipid bilayer that confers viscoelastic behavior. Sialylated glycoproteins of the RBC membrane are responsible for a negatively charged surface, which creates a repulsive electric zeta potential (Z) between the cells.The compact layer of charge or Stern consists of ions
Publicado em: 2009
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3. Ferramenta biofotonica integrada para manipulações e microscopias confocais / Integrates biophotonic tool for manipulations and confocal microscopies
The research in biomedical photonics is clearly evolving in the direction of the understanding of biological processes at the cell level. The spatial resolution to accomplish this task practically requires photonics tools. However, an integration of different photonic tools and a multimodal and functional approach will be necessary to access the mechanical a
Publicado em: 2007
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4. Desenvolvimento de metodologia de medida vetorial das forças em tempo real de microorganismos utilizando ponças opticas para estudos de quimiotaxia e osmotaxia de parasita / Development of methodology vectorial measurements of forces in real time of microorganisms using optical tweezers for chemotaxis and osmotaxis studies of parasites
Unicellular microorganisms, like others live beings, need to interact with environment to find nourishment. They have only hydrodynamics sensors and biochemical receptors on membrane to accomplish this task. The response of the microorganism to concentration gradients of attractive or repulsive chemical substances is called chemotaxis. The investigation of c
Publicado em: 2007
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5. Força optica em pinças opticas : estudo teorico e experimental / Optical force in optical tweezers : theory and experiment
The optical tweezers is an instrument capable of manipulating and trapping dielectric particles through the radiation pressure. Their applications in the life sciences and biophysics increased exponentially after it has been demonstrated that it allowed to microorganisms to be maintained alive trapped for long times. Information obtained from these experimen
Publicado em: 2006
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6. Análise do potencial de calibração da força óptica através de dispositivos de microscopia de força atômica / Analysis of the calibration potential of optical force through atomic force microscopy devices
O microscópio de força atômica é uma ferramenta que possibilita a medida de forças precisamente localizadas com resoluções no tempo, espaço e força jamais vistas. No coração deste instrumento está um sensor a base de uma viga (cantilever) que é responsável pelas características fundamentais do AFM. O objetivo desta pesquisa foi usar a deflexã
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2005
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7. Sistema de micromanipulação e microanalise com pinças oticas / Micromanipulation and microanalysis in an optical tweezers systems
Not informed
Publicado em: 2004