Light Dark Cycle
Mostrando 1-12 de 280 artigos, teses e dissertações.
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1. The circadian timing of noise exposure influences noise-induced inflammatory responses in the mouse cochlea
Abstract Introduction: Noise-induced hearing loss is one of the most common forms of sensorineural hearing loss. Nevertheless, the mechanisms of noise-induced hearing loss are still not fully understood. Objective: To investigate the dynamics of inflammatory responses in the mammalian cochlea following noise trauma at two different times, once during the l
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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2. Cytokinins in the in vitro multiplication and analysis of the volatile fraction of Hyptis marrubioides
RESUMO objetivou-se com o presente trabalho avaliar diferentes concentrações de duas citocininas na propagação in vitro da planta medicinal Hyptis marrubioides Epl. e analisar a fração volátil dos compostos. Segmentos nodais de plantas foram inoculados em meio sólido de Murashige e Skoog (MS) com diferentes concentrações de benzilaminopurina (BAP)
Rev. Ciênc. Agron.. Publicado em: 2019-03
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3. The influence of a light and dark cycle on the egg laying activity of Aedes aegypti (Linnaeus, 1762) (Diptera: Culicidae)
BACKGROUND The epidemiological importance of the mosquito Aedes aegypti as a vector of multiple human pathogens has generated a growing number of studies on the physiology and behaviour of its blood-feeding females. The activity of oviposition is one of the critical elements contributing to the expansion of Ae. aegypti's populations. Although there is a vas
Mem. Inst. Oswaldo Cruz. Publicado em: 05/02/2018
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4. Floating Aquatic Macrophytes Decrease the Methane Concentration in the Water Column of a Tropical Coastal Lagoon: Implications for Methane Oxidation and Emission
ABSTRACT In wetlands, the knowledge accumulated on the role of aquatic plants in the methane cycle focused on emergent macrophytes, to the detriment of other typologies. Herein, we evaluated whether the free-floating macrophyte Salvinia auriculata Aubl. and the floating-leaved macrophyte Eichhornia azurea (Sw.) Kunth. decrease the water column methane concen
Braz. arch. biol. technol.. Publicado em: 18/05/2017
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5. Phytochemical and Morphological Evidences for Shikonin Production by Plant Cell Cultures of Onosma sericeum Willd
ABSTRACT Shoot regeneration, callus growth, and biosynthesis of shikonin in callus cultures of Onosma sericeum were examined. Plant tissue culture was used as an alternative method for increasing the production of shikonin, a secondary metabolite. The isolated cultures were subjected to abiotic factors such as light, plant growth regulators, and nutritional
Braz. arch. biol. technol.. Publicado em: 31/10/2016
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6. Effect of temperature changes on the cercarial-shedding rate of two trematodes
ABSTRACT Since temperature is a key condition in the initiation of cercarial emergence, the objective of the work reported here was to evaluate the effect of that variable on the shedding of two morphologic and taxonomic types of cercariae. Bioassays were accordingly performed with snails naturally infected with either monostome or pleurolophocercous cercari
Iheringia, Sér. Zool.. Publicado em: 05/09/2016
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7. Differential susceptibility of BALB/c, C57BL/6N, and CF1 mice to photoperiod changes
Objective:Circadian disturbances common to modern lifestyles have been associated with mood disorders. Animal models that mimic such rhythm disturbances are useful in translational research to explore factors contributing to depressive disorders. This study aimed to verify the susceptibility of BALB/c, C57BL/6N, and CF1 mice to photoperiod changes.Methods:Th
Rev. Bras. Psiquiatr.. Publicado em: 24/03/2015
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8. Role of Light and Dark Cycle and Different Temperatures in the Regulation of Growth and Protein Expression in Oscillatoria agardhii Strain
The cyanobacterium Oscillatoria agardhii was isolated from the fresh water Mawatha lake, Jaipur and was grown in Zarrouk's medium at 25 ± 2°C, illuminated with white fluorescent light at the intensity of 2 500 lux with 12:12 h light and dark photoperiod. The effects of photoperiod and temperature on the growth and protein expression by Oscillatoria agardhi
Braz. arch. biol. technol.. Publicado em: 2014-12
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9. Presentation of an experimental method to induce in vitro ("organ chambers") respiratory acidosis and its effect on vascular reactivity
PURPOSE:To create in vitro a model to generate acidosis by CO2bubbling "organ chambers", which would be useful for researchers that aim to study the effects of acid-base disturbs on the endothelium-dependent vascular reactivity.METHODS:Eighteen male Wistar rats (230-280g) were housed, before the experiments, under standard laboratory conditions (12h light/da
Acta Cir. Bras.. Publicado em: 2014-11
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10. Hatching and larval export of the intertidal crab Neohelice granulata in Mar Chiquita coastal lagoon, Argentina
Synchronization in the events of the reproductive cycle in female Neohelice granulata Dana, 1851 were studied from samples taken weekly and biweekly from September to December 2006 in the Laguna Mar Chiquita. The timing and larval hatching and synchronicity were inferred from numbers of ovigerous females and observing the stages of embryonic development. Syn
Iheringia, Sér. Zool.. Publicado em: 2013-06
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11. Germination and sporophytic development of Regnellidium diphyllum Lindm. (Marsileaceae) in the presence of copper
Regnellidium diphyllum Lindm. is a heterosporous fern growing in wetlands and humid soils that are being converted to agricultural activities. Many products that are used in agriculture contain copper, resulting in surface and groundwater contamination. Germination and initial development tests were performed using Meyer's solution containing copper sulphate
Acta Bot. Bras.. Publicado em: 2013-03
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12. 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