Dark Adaptation
Mostrando 1-12 de 162 artigos, teses e dissertações.
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1. Vitality of lichens under different light climates in an Araucaria forest (Pró-Mata RS, South Brazil) as determined by chlorophyll fluorescence
ABSTRACT The vitality of 64 lichen species (107 individual lichen thalli) growing under different light climates in an Araucaria forest in South Brazil was analyzed by chlorophyll fluorescence. Study sites were grouped according to their local light availability under full sunlight (about 2200 µmol m-2 s-1): 1 = low light, up to 20 µmol m-2 s-1; 2 = medium
Acta Bot. Bras.. Publicado em: 08/01/2018
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2. Mad, bad and dangerous to know: the biochemistry, ecology and evolution of slow loris venom
Only seven types of mammals are known to be venomous, including slow lorises (Nycticebus spp.). Despite the evolutionary significance of this unique adaptation amongst Nycticebus, the structure and function of slow loris venom is only just beginning to be understood. Here we review what is known about the chemical structure of slow loris venom. Research on a
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 24/09/2013
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3. A adaptação barroca de Dom Casmurro para Capitu: do livro ao corpo na TV
This research is inscribed in the gap between two ends: the eyes of the body and the eyes of the lenses of the cameras in the dialog between literature and body in/of the television. It investigates the relation of the book Dom Casmurro, written by Machado de Assis and published in 1899, and the micro-series Capitu, directed by Luiz Fernando Carvalho and bro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2012
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4. Efeito de duas variedades de feijão (Phaseolus vulgaris) no metabolismo lipídico de hamsters / Effect of two beans varieties (Phaseolus vulgaris) in hamster lipid metabolism [Dissertation].
Carioca and black beans are the varieties of Phaseolus vulgaris most consumed on Brazil Southwest. It is well described that some legumes, as soy and cowpea beans, have hypocholesterolaemic effects. To test cholesterol-lowering properties of carioca and black beans, two biological assays were conducted. Golden Syrian hamsters, 21 days old, were housed indivi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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5. Modulação da expressão de conexinas na retina: um estudo morfológico, bioquímico e funcional. / Modulation of connexin expression in retina: a study using morphological, biochemical and functional approaches.
Life is a dynamic process in time and space, resulting from an interaction provided by gap junctions (GJs), channels composed of connexins (Cxs) that permits the passage of molecules up to 1kDa and ions. The aim of this study was analyze the modulation of Cxs during development, dark adaptation and after local mechanical trauma in the retina using techniques
Publicado em: 2009
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6. Comparison of radiographic measurements obtained with conventional an indirect digital imaging during endontic treatment
The aims of this study were to evaluate the quality of indirect digitized radiographic images taken during endodontic procedures and to compare the measurements recorded with this technique to those obtained from conventional radiographs. Two-hundred conventional periapical radiographs taken at the undergraduate Endodontics Clinic of the Dental School of Bau
Journal of Applied Oral Science. Publicado em: 2008-04
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7. Production, morphologic and ultra-structural analyses of Passiflora spp. callus. / ObtenÃÃo, anÃlises morfolÃgicas e ultra-estruturais de calos de Passiflora spp.
Brazil occupies a position of prominence in the passion fruit plant culture, being the largest world producer of passion fruit. In the last years, the increasing demand resulted in a expansion of the planted area resulting in the expansion and appearance of many diseases. Some species not cultivated, as Passiflora gibertii N. E. Brown and Passiflora edulis e
Publicado em: 2007
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8. Métodos emergentes de física-estatística aplicados a séries temporais
The main objective of the present work was to apply recently developed in methods in physics-statistics to the time series, especifically in this work, to intervals of heart beats obtained from blood pressure signs (BP) of the sloth (Bradypus variegatus), with the purpose of identifying differences in fractality terms in the system of autonomous control rela
Publicado em: 2006
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9. Exigências térmicas de Aedes (Stegomyia) albopictus Skuse, 1894 (Diptera, Culicidae) em condições de laboratório
Thermal requirements of Aedes (Stegomyia) albopictus Skuse, 1894 (Diptera, Culicidae) under laboratory conditions. Allochtonous species of Ae. albopictus in the American continent can be found in fourteen Brazilian states - about fifteen years had been elapsed since the first report of the presence of this species in Brazilian territory. Considering its pote
Revista Brasileira de Entomologia. Publicado em: 2002
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10. Pupil size following dark adaptation in patients with retinitis pigmentosa
According to the equivalent light hypothesis, molecular defects in the photoreceptor lead to a continuous activation of the photoreceptor cascade in a manner equivalent to real light. The consequences in diseases such as retinitis pigmentosa (RP) are as disruptive to the cells as real light. Two forms of the equivalent light hypothesis can be distinguished:
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-08
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11. Variação circadiana na habituação da resposta exploratoria a estimulos sonoros em pombos (Columba livia), submetidos a condições de claro-escuro e de claro constante
The present work investigated habituation learning to acoustic stimulation in the context of temporal organization of behavior. The process of habituation of the exploratory responses to sound was analvsed in three experiments. The main purpose of these experiments was the analysis of these responses as function of the time of habituation sessions, i.e., mor
Publicado em: 1993
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12. Rod-cone interaction in patients with fundus flavimaculatus.
Dark adaptation and the rise of cone flicker threshold (25 Hz) during dark adaptation were measured psychophysically in three patients with fundus flavimaculatus. The dark adaptation curve showed a delayed rod-cone break but a normal final rod threshold in all these patients. However, the rise of cone flicker threshold during dark adaptation was not delayed