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Mechanisms of Plasma-Seed Treatments as a Potential Seed Processing Technology

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Boundary conditions for plasma fluid models at the magnetic presheath entrance

Paolo Ricci, Christian Gabriel Theiler, Joaquim Loizu Cisquella

For the first time, a rigorous definition of the magnetic presheath entrance (MPSE) is provided, as the location where the drift-reduced approximation breaks down. We consider a weakly collisional electrostatic plasma with cold ions in contact with an abso ...

2011

We investigate how central-place seed foragers with a nest in the proximity of one or more seed sources determine the formation of different vegetation patterns. In particular, we discuss the ecological conditions that lead to the formation of hump-shaped ...

2009

Impact of abundance weighting on the response of seed traits to climate and land use

Jiri Dolezal, Aurélie Thébault

1.Many studies have identified relationships between plant reproductive behaviour and environmental conditions. However, they have all been based on cross-species analysis and take no account of the relative abundance of species with vegetation. 2.Using tw ...

Wiley-Blackwell2008

Mechanism for blob generation in the TORPEX toroidal plasma

Ambrogio Fasoli, Jonathan Graves, Ivo Furno, Paolo Ricci, Stephan Brunner, Benoît Labit, Christian Gabriel Theiler, Mario Ludovico Podesta, Francesca Maria Poli, Stefan Müller

The mechanism for blob generation is detailed in the toroidal magnetized plasma of the TORPEX device [ Fasoli et al., Phys. Plasmas 13, 055902 (2006) ] using an experimental configuration, which features a plasma region dominated by a coherent wave and a r ...

American Institute of Physics2008

Alginate-based microcapsules for mammalian cell culture and other biotechnological applications

Véronique Breguet

Since life began, nature has been using the envelopment of systems for their protection or for providing a particular reaction space, the enveloping wall displaying additional specific membrane functions. The abundance of examples is quite overwhelming and ...

EPFL2007

Competitive effects of herbaceous vegetation on tree seedling emergence, growth and survival: does gap size matter?

Alexandre Buttler, Charlotte Vandenberghe, François Frelechoux

Question: What is the effect of gap size on the seedling emergence, growth and survival of four common tree species in wooded pastures? Location: A pasture in the Jura mountains, Switzerland. Methods: Seeds were sown in a complete three-way factorial desig ...

2006

Wood-pastures are semi-natural, highly biodiverse systems maintained by traditional extensive agriculture. They are used for grazing and timber. The shifting mosaics of grassland, shrub thickets and woodland patches in these systems are driven by large her ...

EPFL2006

Characterization of electrical discharge machining plasmas

Antoine Descoeudres

Electrical Discharge Machining (EDM) is a well-known machining technique since more than fifty years. Its principle is to use the eroding effect on the electrodes of successive electric spark discharges created in a dielectric liquid. EDM is nowadays widel ...

EPFL2006

If an ELM is a peeling of flux surfaces from the plasma, due to a broken separatrix, current density is lost as well as particles and energy. The fast loss of a current-carrying plasma layer modifies the plasma equilibrium, leading to sudden shifts in the ...

2005

A digital seed: designing a toy plant to facilitate cognitive growth

Mauro Cherubini

This study is designed to understand how to facilitate children's conceptual growth about plants using digital technology. Fifteen 4 and 5 year old children were interviewed to identify their understandings about plant growth and reproduction. Misunderstan ...

2002