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Mostrando ítems 6071-6080 de 13559
Entomofauna em capítulos de picão-preto
(Sociedade Brasileira da Ciência das Plantas Daninhas, 1999-12-01)
A ocorrência de insetos fitófagos e de himenópteros parasitóides a eles associados, presentes em capítulos de Bidens pilosa são descritas para as condições do município de Botucatu, SP. Foram encontrados predadores de ...
Serotonin and circadian rhythms
(Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)Universidade de Brasília (UnB)Universidade de São Paulo (USP), 2010-12-01)
All mammal behaviors and functions exhibit synchronization with environmental rhythms. This is accomplished through an internal mechanism that generates and modulates biological rhythms. The circadian timing system, ...
Investigation of phase transition in ferroelectric Pb0.70Sr0.30TiO3 thin films
(American Institute of Physics (AIP), 2004-07-15)
We have carried out dielectric and Raman spectroscopy studies at the 298-623 K temperature range in polycrystalline Pb0.70Sr0.30TiO3 thin films grown by a soft chemical method. The diffuse phase-transition behavior of the ...
Spectroscopic study of ejected dental tissue after Er : YAG laser ablation
(Elsevier B.V., 2003-05-01)
By means of IR spectroscopy, we determined the teeth ablation mechanism by an Er:YAG laser oscillating at 2.94 mum. Ejected dental material, ablated by the laser from human teeth, was deposited on an IR window and the ...
Time analysis for temporary gravitational capture - Stable orbits
(Edp Sciences S A, 2001-10-01)
In a previous work, Vieira Neto & Winter (2001) numerically explored the capture times of particles as temporary satellites of Uranus. The study was made in the framework of the spatial, circular, restricted three-body ...
NOx and CO emissions and soot presence in partially premixed acoustically excited flames
(Maney Publishing, 2009-09-01)
The pulsating combustion process has attracted interest in current research because its application in energy generation can offer several advantages, such as fuel economy, reduced pollutants formation, increased rate of ...
Fabrication of phytic acid sensor based on mixed phytase-lipid Langmuir-Blodgett films
(Amer Chemical Soc, 2006-09-26)
This paper reports the surface activity of phytase at the air-water interface, its interaction with lipid monolayers, and the construction of a new phytic acid biosensor on the basis of the Langmuir-Blodgett (LB) technique. ...
Numerical study of low-cost alternative orbits around the Moon
(Elsevier B.V., 2005-01-01)
In this paper, we have investigated a region of direct stable orbits around the Moon, whose stability is related to the H2 Family of periodic orbits and to the quasi-periodic orbits that oscillate around them. The stability ...
Effect of fertilization in water quality and in zooplankton community in open plankton-culture ponds
(Universidade Federal de Uberlândia (UFU), 2009-01-01)
The effect of swine manure fertilization on the water quality of zooplankton artificial culture in two ponds was measured in diel cycles on different months (October 1999, January and March 2000). Fertilization affected ...
Use of monocular and binocular visual cues for postural control in children
(Assoc Research Vision Ophthalmology Inc, 2011-01-01)
The purpose of the present study was to examine how children's postural control is affected by different visual cues. Sixteen children, ages 8 and 12 years, and eight adults participated in the study. Each was asked to ...