Concept

Cell counting

Publications associées (33)

Label-free Sorting and Counting of Yeast Cells for Viability Studies

Philippe Renaud, Niccolo Piacentini, Raphaël Tornay, Nina Buffi

This paper reports the new combination of cell sorting and counting capabilities on a single device. Most state-of-the-art devices combining these technologies use optical techniques requiring complicate experimental setups and labeled samples. The use of ...

Elsevier2009

All the Disorder Mechanisms in the 13:58 Phases Come Together. Out of the Modulated Confusion Rises the Remarkable Phase Ce12.60Cd58.68(2)

The compound

Ce_{12.60}Cd_{58.68(2)}

is a metrically commensurate representative of the incommensurately modulated phase

Ce_{13}Cd_{57+\delta}

. It is most likely a lock-in phase. The structure, which was solved using seeding of the modulation from thos ...

2008

Design and Optimization of a Lactate Amperometric Biosensor based on Lactate Oxidase and Multi Walled-Carbon Nanotubes

Giovanni De Micheli, Sandro Carrara, Cristina Boero

Lactate concentration in physiological fluids is an indicator of the energy production under anaerobic conditions of the whole organism [1]. Normal value for lactate level in blood ranges from 0.5 – 2.5 mM. Blood lactate values exceeding 7-8 mM are sometim ...

2008

Analytical expression for electric filed between two facing strip electrodes in microchannels

Philippe Renaud, Olof Pontus Linderholm, Urban Seger

An analytical solution is presented for the electric field between two facing strip electrodes situated in a microchannel, as frequently used in impedance cytometry applications. The measured change in resistance as induced by a 5 mm bead moving through th ...

2006

New disposable tubes for rapid and precise biomass assessment for suspension cultures of mammalian cells

Florian Maria Wurm, David Hacker, Martin Jordan, Mathieu Benjamin Stettler, Nicolas Jaccard

We present a new approach for biomass assessment in cell culture using a disposable microcentrifuge tube. The specially designed tube is fitted with an upper chamber for sample loading and a lower 5 microL capillary for cell collection during centrifugatio ...

2006

Droplet-Based DNA Purification in a Magnetic Lab-on-a-Chip

Martinus Gijs, Ulrike Lehmann, Virendra Kumar Parashar, Caroline Vandevyver

Merge, Mix, Split and Transport, these are the main manipulation steps used for on-chip droplet-based DNA purification (see figure). The system is able to extract genomic material from dilute cell samples by using the actuation of magnetic microparticles w ...

2006

High count rates with total internal reflection fluorescence correlation spectroscopy

Theo Lasser, Kai Hassler

We achieved photon count rates per molecule as high as with commonly used confocal fluorescence correlation spectroscopy instruments using a new total internal reflection fluorescence correlation spectroscopy system based on an epi-illumination configurati ...

2005

Replication dynamics of Mycobacterium tuberculosis in chronically infected mice

John McKinney

The dynamics of host-pathogen interactions have important implications for the design of new antimicrobial agents to treat chronic infections such as tuberculosis (TB), which is notoriously refractory to conventional drug therapy. In the mouse model of TB, ...

2004

Dielectric spectroscopy in a micromachined flow cytometer: theoretical and practical considerations

Philippe Renaud, Arnaud Bertsch, Shady Didier Gawad, Urban Seger, Karen Cheung

We propose a model to determine the influence of different cell properties, such as size, membrane capacitance and cytoplasm conductivity, on the impedance spectrum as measured in a microfabricated cytometer. A dielectric sphere of equivalent complex permi ...

2004

On-chip impedance-spectroscopy for flow-cytometry using a differential electrode sensor

Philippe Renaud, Shady Didier Gawad

On-chip cell handling and analysis is given more and more interest, as new cytometry devices can be realised or efficiently combined and integrated. The developed sensor presents several improvements compared to other integrated flow cytometers. It is aime ...

2001

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All the Disorder Mechanisms in the 13:58 Phases Come Together. Out of the Modulated Confusion Rises the Remarkable Phase Ce12.60Cd58.68(2)

The compound

Ce_{12.60}Cd_{58.68(2)}

is a metrically commensurate representative of the incommensurately modulated phase

Ce_{13}Cd_{57+\delta}

. It is most likely a lock-in phase. The structure, which was solved using seeding of the modulation from thos ...

2008