Concept

Pollen

Publications associées (32)

An optical tweezer actuated, nanoaperture-grid based Optofluidic Microscope implementation method

We report a novel grid based Optofluidic Microscope (OFM) method where a closely spaced 2D grid of nanoapertures (diameter = 100 nm, separation = 2.5 mu m) provided patterned illumination. We achieved a one-to-one mapping of the light transmissions through ...

2007

Concentration profiles of particles settling in the neutral and stratified atmospheric boundary layer

Marc Parlange, Charles Vivant Ignacio Meneveau

An expression for the vertical equilibrium concentration profile of heavy particles, including the effects of canopy on the eddy diffusivity as well as corrections for atmospheric stability, is proposed. This expression is validated against measurements of ...

2007

Holocene climate change in the eastern Mediterranean region: A comparison of stable isotope and pollen data from Lake Gōlhisar, southwest Turkey

Basil Andrew Stansfield Davis

Stable isotope and pollen data from Gölhisar Gölü, a small intramontane lake located in southwest Turkey, provide complementary records of Holocene climate change. Modern oxygen and hydrogen isotope water data are used as a means of comparing present-day i ...

2007

Shot noise, refractive index tomography and aberrations estimation in digital holographic microscopy

Florian Charrière

The present thesis develops some specific aspects of digital holographic microscopy (DHM), namely the effect of shot noise on the phase image accuracy, the use of DHM in micro-tomography and in aberrations evaluation of a microscope objective (MO). DHM is ...

EPFL2007

Biological cell (pollen grain) refractive index tomography with digital holographic microscopy

Christian Depeursinge, Etienne Cuche, Pierre Marquet, Florian Charrière

This paper present a novel approach to perform the tomography of biological specimen based on Digital Holographic Microscopy (DHM). A hologram results from the interference between a reference wave and an object wave reflected from or transmitted through a ...

SPIE2006

Cell refractive index tomography by digital holographic microscopy

Christian Depeursinge, Tristan Colomb, Etienne Cuche, Frédéric Montfort, Pierre Marquet, Jonas Kühn, Florian Charrière, Mihaela Marian

For what we believe to be the first time, digital holographic microscopy is applied to perform optical diffraction tomography of a pollen grain. Transmission phase images with nanometric axial accuracy are numerically reconstructed from holograms acquired ...

2006

Influence of Ta and Ti Doping on the High Field Performance of (Nb,Ta,Ti)(3)Sn Multifilamentary Wires based on Osprey Bronze with High Tin Content

Davide Uglietti

Ta and Ti are the most widely used additions for technical Nb3Sn multifilamentary superconductors. These elements are known to influence grain growth, grain morphology and chemical composition in the A15 layer, hence the current carrying properties of the ...

Institute of Physics Publishing2006

Modern pollen-vegetation relationships in the Champsaur valley (French Alps) and their potential in the interpretation of fossil pollen records of past cultural landscapes

Alexandre Buttler

This study is an attempt to evaluate the relationships between the vegetation and the modem pollen rain as a contribution to palaeoecological research. Pollen analysis of surface moss polsters and floristic records has been undertaken for 51 sampling point ...

2005

Digital holographic microscopy applied to pollen cells analysis and recognition

Christian Depeursinge, Etienne Cuche, Pierre Marquet, Florian Charrière

The ability of digital holographic microscopy (DHM) to provide both amplitude and phase images of a specimen makes it a convenient tool for cells analysis and recognition. Practical applications are demonstrated on pollen particles. © 2005 SPIE and OSA. ...

SPIE2005

A probabilistic approach of pollen indicators for plant functional types, an application to the European vegetation at 0k and 6k

Basil Andrew Stansfield Davis

Aim: This paper presents a probabilistic method for the characterization of pollen taxa using attributes, and for the reconstitution of past biomes. The probabilities are calculated on the basis of European floristic and pollen databases sufficiently large ...

2003

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