Eric Kroemer

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The increasing interest in the generation of lectin or antigen-activated (human) T cells by means of Interleukin-2 (TCGF) has led to numerous attempts to produce this substance. The simplest procedure is to use conditioned medium (CM) from IL-2 producing primary cells or cell lines with considerable activity. We describe a method of continuous CM-production(More)
We report on the metrological characterization of novel commercially available 894.6 nm vertical-cavity surface-emitting lasers (VCSELs), dedicated to Cs D<sub>1</sub> line spectroscopy experiments. The thermal behavior of the VCSELs is reported, highlighting the existence of a minimum threshold current and maximum output power in the 55°C-60°C range. The(More)
We report on the characterization of Cs vapor microfabricated cells filled with a Ne-He buffer gas mixture using coherent population trapping (CPT) spectroscopy. The temperature dependence of the Cs clock frequency is found to be canceled at the first order around a so-called inversion temperature higher than 80°C whose value depends on the buffer gas(More)
During flow cytometric analysis of 29 samples of human peripheral blood mononuclear cells, we observed that a light scatter-based lymphocyte gate would fail to cover all TCR (CD3)-expressing cells. A mean of 7.9 +/- 5.3% of all CD3+ cells was found outside the gate. In addition, this shifted cell subset showed an altered CD4/CD8 ratio (8.1 +/- 5.0% of all(More)
A simple system was developed to evaluate tests using the principle of the multiplication of specific cells. Of the possible application such as hormones, growth factors, etc., we show here the determination of IL-2 activity. The test is performed in flat bottom microplates wherein the sample is diluted with standard microtiter systems and cells are added.(More)
We report on the characterization and validation of custom-designed 894.6 nm vertical-cavity surface-emitting lasers (VCSELs), for use in miniature Cs atomic clocks based on coherent population trapping (CPT). The laser relative intensity noise (RIN) is measured to be 1 × 10(-11) Hz(-1) at 10 Hz Fourier frequency, for a laser power of 700 μW. The VCSEL(More)
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