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Nomenclatura Unesco > (22) Física > (2209) Óptica
(2209.01) Espectroscopía de absorción (2209.02) Cinematografía
(2209.03) Colorimetría (2209.04) Espectroscopía de emisión
(2209.05) Fibras ópticas (2209.06) Óptica geométrica
(2209.07) Holografía (2209.08) Iluminación
(2209.09) Radiación infrarroja (2209.10) Láseres
(2209.11) Luz (2209.12) Microscopios
(2209.13) Óptica no lineal (2209.14) Propiedades ópticas de los sólidos
(2209.15) Optometría (2209.16) Instrumentos fotográficos
(2209.17) Fotografía (2209.18) Fotometría
(2209.19) Óptica física (2209.20) Radiometría
(2209.21) Espectroscopía (2209.22) Radiación ultravioleta
(2209.23) Radiación visible (2209.24) Física de la visión
(2209.90) Tratamiento digital. Imágenes (2209.99) Otras (especificar)

Categorías relacionadas:
(3311.11) Instrumentos ópticos

Mostrando recursos 1 - 20 de 25,062

1. Ultrastructural and morphometric characterization of buffalo (Bubalus bubalis) ovarian preantral follicles - Mondadori, Rafael Gianella; Luque, Maria Carolina Aquino; Santin, Tiago Rollemberg; Báo, Sônia Nair
The main objective of the present study was to characterize buffalo preantral ovarian follicles. Parts of ovarian cortex, collected from postpubertal buffalo females that were having estrous cycles at regular intervals, were selected under stereomicroscopy and processed for optic and transmission electron microscopy. Primordial follicles were characterized as an oocyte encircled by one layer of flattened cells. The buffalo primordial follicle has a mean diameter of 35 μm and the oocyte diameter is 24.9 μm. The oocyte nucleus is relatively large and eccentric; and in the cytoplasm a large amount of mitochondria, vesicles and endoplasmic reticulum cistern, mainly of the...

2. Sphingosine 1-phosphate promotes activation of aprine preantral follicle in vitro - Nóbrega Junior, Jandui Escarião da; Rossetto, R.; Matos, M.H.T.; Chaves, R.N.; Magalhães, D.M.; Lima-Verde, Isabel Bezerra; Báo, Sônia Nair; Campello, C. C.; Figueiredo, José Ricardo de; Gonçalves, P.B.D.; Oliveira, J.F.C.
Este estudo descreve o efeito da esfingosina 1-fosfato (S1P) no desenvolvimento de folículos pré-antrais, portanto da ativação e viabilidade de folículos caprinos cultivados in vitro. Fragmentos de ovários foram cultivados por um ou sete dias em meio essencial mínimo com diferentes concentrações de S1P (0, 1, 10, 50, 100 ou 200ng/mL). Os fragmentos de ovário foram processados para análise histológica em microscopia óptica, microscopia eletrônica e microscopia de fluorescência. O tratamento usando 1ng/mL de S1P foi capaz de manter a porcentagem de folículos normais durante o período de cultivo de sete dias. Ao final do período de cultivo, houve uma...

3. Identificação de fitofisionomias do Bioma Cerrado no estado de Goiás, por meio de aerogamaespectrometria e sensoriamento remoto óptico - Castro, Bruno Leonardo Gonçalves e
Tese (doutorado)—Universidade de Brasília, Instituto de Geociências, 2014.

4. Classificador de tráfego e selecionador de paradigma de comutação para redes ópticas híbridas - Silva, Ana Carolina de Oliveira da
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2014.

5. Estudo da parametrização de funcionais LRC aplicados a propriedades ópticas de carotenóides - Prado, Andriele da Silva
Dissertação (mestrado)—Universidade de Brasília, Instituto de Física, 2014.

6. Equalização na frequência para sistemas de comunicações ópticas de curta distância com detecção direta - Vasconcelos, Celio Ken-Ichi Hosaka de
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2014.

7. Nano guiding of light using Dyakonov waves - Takayama, Osamu; Torner Sabata, Lluís; Artigas García, David
This special issue of Optics & Photonics News highlights the most exciting peer-reviewed optics research to have emerged over the past 12 months.

8. Tunable beam displacer - Luis José, Salazar-Serrano; Valencia, Alejandra; Perez Torres, Juan
We report the implementation of a tunable beam displacer, composed of a polarizing beam splitter (PBS) and two mirrors, that divides an initially polarized beam into two parallel beams whose separation can be continuously tuned. The two output beams are linearly polarized with either vertical or horizontal polarization and no optical path difference is introduced between them. The wavelength dependence of the device as well as the maximum separation between the beams achievable is limited mainly by the PBS characteristics.

9. Fast monitoring of in-vivo conformational changes in myosin using single scan polarization- SHG microscopy - Psilodimitrakopoulos, Sotiris; Loza Alvarez, Pablo; Artigas García, David
Fast imaging of molecular changes under high-resolution and label-free conditions are essential for understanding in-vivo processes, however, current techniques are not able to monitor such changes in real time. Polarization sensitive second harmonic generation (PSHG) imaging is a minimally invasive optical microscopy technique capable of quantifying molecular conformational changes occurring below the diffraction limit. Up to now, such information is generally retrieved by exciting the sample with different linear polarizations. This procedure requires the sample to remain static during measurements (from a few second to minutes), preventing the use of PSHG microscopy from studying moving samples or molecular dynamics in living organisms. Here...

10. Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling - Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V.; Lobanov, Valery E.; Torner Sabata, Lluis
We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons in a two-core guiding structure with inter-core coupling dispersion (CD). We show that CD profoundly affects properties of the solitons, causing the complete stabilization of the otherwise highly unstable spatiotemporal solitons in Kerr media with focusing nonlinearity. We also find that the presence of CD stimulates the formation of bound states, which, however, are unstable.

11. Self-deflecting plasmonic lattice solitons and surface modes in chirped plasmonic arrays - Li, Chunyan; Cui, Ran; Ye, Fangwei; Kartashov, Yaroslav V; Torner Sabata, Lluis; Chen, Xianfeng
We show that chirped metal-dielectric waveguide arrays with focusing cubic nonlinearity can support plasmonic lattice solitons that undergo self-deflection in the transverse plane. Such lattice solitons are deeply subwavelength self-sustained excitations, although they cover several periods of the array. Upon propagation, the excitations accelerate in the transverse plane and follow trajectories curved in the direction in which the separation between neighboring metallic layers decreases, a phenomenon that yields considerable deflection angles. The deflection angle can be controlled by varying the array chirp. We also reveal the existence of surface modes at the boundary of truncated plasmonic chirped array that form even in the absence of nonlinearity.

12. Casa Esteve Arrufat, Barri Vell de Girona - Noguera Nieto, Anna
La reforma se ha planteado como una búsqueda de las características más intrínsecas de la propia construcción, mientras que el edificio se despoja de añadidos, elementos superficiales y reformas recientes, interpretando los elementos antiguos no tanto desde una óptica histórica como desde sus cualidades arquitectónicas

13. Processo justo e contraditório dinâmico - Theodoro Júnior, Humberto
This article presents an analysis of the due process of law through the optic of the nominated “fair process”, especially by the sight of Comoglio. For that, it is important to analyze which is effectively the dimension that should be given to the fair process. It is imperative to consider, in this way, the role of the contradictory in the context of this “fair” process. Key words: due process of law, fair process, contradictory.

14. Acesso à água tratada e insuficiência de renda. Duas dimensões do problema da pobreza no Nordeste brasileiro sob a óptica dos Objetivos de Desenvolvimento do Milênio - Reymão, Ana Elizabeth; Abe Saber, Bruno
The quality, availability and accessibility to water are essential to human development and their provision must be one of the poverty reduction policies’ main concerns. Through analysis of data related to targets 1 and 10 of the Millennium Development Goals, this work aimed to measure one of the poverty incidence features attributed to environmental causes –environmental poverty–, articulating the environmental and social dimensions of sustainable development. The research problem was to establish the magnitude of the relation between income shortage and access to drinking water in the Brazilian Northeast region. The estimated models and other data analysis disclosed some determinants...

15. Segmentación y posicionamiento de productos “culturales” - Páramo Morales, Dagoberto
Abordar un tema de tamaña trascendencia para la construcción de las sociedades modernas exige, ineludiblemente, como preámbulo del debate aquí planteado, el deslinde preciso de varios conceptos que subyacen y le dan vida a las reflexiones en tomo al papel que juega el marketing en la construcción de un mundo culturalmente constituido que, a su vez, le sirve de marco para su acción voluntaria y planeada. Esto obliga, primero que todo, a entender que el proceso de desarrollo de los llamados productos culturales, su segmentación y las estrategias deliberadamente concebidas e implementadas para un determinado posicionamiento, debe ser visto tanto...

16. Módulos de entrenamiento para la medición y adquisición de datos (Módulo de visión) - Mejia, I.; Gutiérrez, J; Moncada B., V.
En este artículo se presenta el proyecto de diseño e implementación de una herramienta de laboratorio, que pretende contribuir a solucionar el déficit existente de medios de entrenamiento para los estudiantes de la carrera de Ingeniería Electrónica de la Universidad Nacional de Ingeniería. El proyecto está enmarcado dentro del área de automatización industrial, específicamente en la adquisición y procesamiento de imágenes. El sistema de Visión Artificial implementado tiene capacidad de permitir la realización de diferentes prácticas en el área de adquisición y procesamiento de imágenes. Entre las aplicaciones que este sistema ofrece se destacan: Detección de fallas en la fabricación...

17. Diseño y aplicación de hidrogeles basados en polisacáridos para ingeniería de tejido óseo - Medina, Lara; Cortizo, María Susana; Cortizo, Ana María
El tejido óseo, a diferencia del cartílago, tiene la capacidad de reparar constantemente los microdaños que se producen en forma cotidiana; sin embargo, frente a fracturas de gran tamaño o pérdida ósea, puede ser necesaria la estabilización mecánica de la lesión, o bien el empleo de sistemas de “scaffolds” (andamiajes) que permitan el desarrollo osteoblástico para reparar la lesión. La estimulación de la producción ósea requerida para tratar la pérdida de hueso emplea estrategias basadas en técnicas de ingeniería de tejidos: usando factores de crecimiento o agentes osteogénicos, utilizando matrices biodegradables a la velocidad adecuada para funcionar como soportes para...

18. Macular thickness changes in a patient with Leber’s hereditary optic neuropathy - Mizoguchi, Ayako; Hashimoto, Yuki; Shinmei, Yasuhiro; Nozaki, Mayo; Ishijima, Kan; Tagawa, Yoshiaki; Ishida, Susumu

19. Dorsoventral patterning of the Xenopus eye involves differential temporal changes in the response of optic stalk and retinal progenitors to Hh signalling - Wang, Xiumei; Lupo, Giuseppe; He, Rongqiao; Barsacchi, Giuseppina; Harris, William A; Liu, Ying

20. Snug harbor, or, The Champlain mechanics / - Optic, Oliver, 1822-1897.
Mode of access: Internet.

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