Results 41 to 50 of about 1,717 (138)

Composição florística e distribuição de Orchidaceae em uma mata ciliar no Rio Grande do Sul

open access: yesRodriguésia
Resumo Matas ciliares são ambientes que apresentam condições favoráveis para o estabelecimento de Orchidaceae, no entanto, diferenças no gradiente altitudinal e alterações na conservação destes ambientes podem influenciar as espécies presentes. Objetivou-
Viviane Pagnussat Klein   +3 more
doaj   +1 more source

Electrical instabilities in organic semiconductors caused by trapped supercooled water [PDF]

open access: yes, 2006
It is reported that the electrical instability known as bias stress is caused by the presence of trapped water in the organic layer. Experimental evidence as provided by the observation of an anomaly occurring systematically at around 200 K. This anomaly
D. M. de Leeuw   +5 more
core   +1 more source

Phytochemical and biological studies of Gomesa recurva R. Br. (Orchidaceae): Chemotaxonomic significance of the presence of phenanthrenoids

open access: yesBiochemical Systematics and Ecology, 2018
Abstract The phytochemical study of Gomesa recurva R. Br. (Orchidaceae) allowed the identification of nine compounds, daucosterol (1); the phenanthrenes 3,4,9-trimethoxy-2,5-phenanthrenediol (2); 4-methoxy-2,3,5-phenanthrenetriol (3); 3,4-dimethoxy-2,5-phenanthrenediol (4); 2,4-dimethoxy-3,5-phenanthrenediol (5); the phenolic compounds 3-(4 ...
Camila Rodolfo Savaris   +10 more
openaire   +1 more source

The canonical correlation analysis between the fitness of organizational condition and integration possibility: The evidence of configurational approach [PDF]

open access: yes, 2015
In past literature, most studies discussed organizational fit from a single perspective instead of examining the positive and negative effects of high and low organizational fit through a comprehensive and concrete narrative and integrated concept ...
Fang, Ching-han   +3 more
core  

Anti-Pneumocystis carinii and antiplasmodial activities of primaquine-derived imidazolidin-4-ones [PDF]

open access: yes, 2008
A series of primaquine-derived imidazolidin-4-ones were screened for their in vitro activity against Pneumocystis carinii and Plasmodium falciparum W2 strain. Most compounds were active against P.
Jiri Gut   +7 more
core   +1 more source

Adsorption of MCPA, 2,4-D and diuron onto activated carbons from wood [PDF]

open access: yes, 2017
Activated carbon adsorbents were produced from particleboard and medium-density fiberboard, industry originated wastes, without value added applications. These materials were characterized, showing a well-developed microporous structure reaching 0.58 cm3/
Almodôvar, Vitor   +3 more
core   +1 more source

A Hybrid Experimental-numerical Sif Determination Technique [PDF]

open access: yes, 2010
Hybrid methods, wherefore numerical and experimental data are used to calculate a critical parameter, have been used for several years with great success in Experimental Mechanics and, in particular, in Facture Mechanics.
Tavares, Paulo J.   +2 more
core   +1 more source

Photodeposition of Pt nanoparticles on Ce-Ti-O [PDF]

open access: yes, 2008
Hydrogenation reactions are the most common examples where transition and noble metal nanoparticles are applied in colloidal solution as quasihomogeneous catalysts [1]. The main drawback in the use of colloidal nanoparticles for catalysis concerns the
Dražić, Goran   +5 more
core  

Graphene-based materials in catalytic wet peroxide oxidation [PDF]

open access: yes, 2014
In catalytic wet peroxide oxidation (CWPO),an advanced oxidation process, hydrogen peroxide (H2O2) is decomposed catalytically giving rise to hydroxyl radicals (HO•).These radicals, exhibiting high oxidizing potential, serve as effective and non ...
Faria, Joaquim   +5 more
core  

A novel approach to modelling and simulating the contact behaviour between a human hand model and a deformable object [PDF]

open access: yes, 2012
A deeper understanding of biomechanical behaviour of human hands becomes fundamental for any human hand-operated Q2 activities. The integration of biomechanical knowledge of human hands into product design process starts to play an increasingly important
Chamoret, D   +5 more
core   +4 more sources

Home - About - Disclaimer - Privacy