Results 51 to 60 of about 1,687 (138)

Wear mechanisms in functionally graded aluminium matrix composites: Effect of the presence of an aqueous solution [PDF]

open access: yes, 2005
Functionally graded aluminium matrix composites reinforced with SiC particles are attractive materials for a broad range of engineering applications in the automotive, aircraft, sports, military and aerospace industries, whenever a superior combination ...
Gomes, J. R.   +4 more
core   +1 more source

Antimicrobial Activity and Chemical Composition of the Essential Oils of Portuguese Foeniculum vulgare Fruits [PDF]

open access: yes, 2015
The aim of this study was to investigate the chemical composition and antimicrobial activity of essential oils obtained by hydrodistillation from fruits of six fennel accessions collected from wild populations occurring in the centre and south of ...
Arantes, Silvia   +7 more
core  

Nanotubos de carbono como suportes para catalisadores de platina [PDF]

open access: yes, 2004
Desde a sua descoberta em 19911, que os nanotubos de carbono tem sido amplamente estudados, devido à sua elevada resistência mecânica, excelentes propriedades eléctricas e térmicas e adequação como suporte de catalisadores heterogéneos para reacções em
Faria, Joaquim   +5 more
core  

Tarefas em geometria: da sala de aula para a formação de professores, descrição de um projeto [PDF]

open access: yes, 2012
Neste poster, apresentamos um projeto que pretende abordar de forma conglomerada conhecimentos, raciocínios, argumentação e representações de alunos e professores dos primeiros anos.
Aires, Ana Paula   +11 more
core  

Friction and wear behaviour of bacterial cellulose against articular cartilage [PDF]

open access: yes, 2011
Bacterial cellulose (BC) is a natural and biocompatible material with unique properties, such as high water holding capacity, ultra-fine fibre network and high strength that makes it an attractive material for the repair of articular cartilage lesions ...
Castanheira, L.   +6 more
core   +1 more source

Carbon nanotubes: a suitable material for catalytic wet peroxide oxidation of organic pollutants? [PDF]

open access: yes, 2012
Carbon materials, such as activated carbons (AC), graphite and activated carbon xerogels, have been explored as metal-free catalysts for the catalytic wet peroxide oxidation (CWPO) of bio-refractory organic compounds, such as azo dyes and phenolic ...
Faria, Joaquim   +3 more
core  

The reinfection threshold [PDF]

open access: yes, 2009
Thresholds in transmission are responsible for critical changes in infectious disease epidemiology. The epidemic threshold indicates whether infection invades a totally susceptible population.
Gomes, M. G. M.   +2 more
core   +1 more source

Diffusion of coloured silica nanoparticles into human hair [PDF]

open access: yes, 2010
A novel method for dyeing human hair fibres using coloured silica nanoparticles of 206 nm has been developed. Diffusion of coloured silica nanoparticles into hair fibres has been investigated; silica nanoparticles do not penetrate at all, or do so only
Gomes, Jaime Rocha   +2 more
core   +1 more source

Enenterum gomesae n. sp. (Enenteridae) in Kyphosus incisor (Kyphosidae) off the Rio de Janeiro coast, Brazil

open access: yesJournal of Helminthology
Abstract The genus Enenterum Linton, 1910 comprises species which parasitize herbivorous kyphosid fish. In the present study, a new species is described based on fresh specimens collected from Kyphosus incisor from Rio de Janeiro. The new species is characterized by having the oral sucker infundibuliform with 10 lobes, prepharynx two times longer ...
C. Portes Santos   +2 more
openaire   +2 more sources

A versatile fluorescence lifetime imaging system for scanning large areas with high time and spatial resolution [PDF]

open access: yes, 2014
"Published in SPIE Proceedings Vol. 9286"We present a flexible fluorescence lifetime imaging device which can be employed to scan large sample areas with a spatial resolution adjustable from many micrometers down to sub-micrometers and a temporal ...
Belsley, M.   +10 more
core   +1 more source

Home - About - Disclaimer - Privacy