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To address large discrepancies reported in the literature, the viscoelastic properties of gels formed by purified actin filaments have been measured by five different techniques and five different instruments using actin preparations purified separately in four different laboratories. These measurements consistently showed that the elastic shear modulus of(More)
To optimize silica-iron oxide magnetic nanoparticles with surface phosphonate groups decorated with 25-kD branched polyethylenimine (PEI) for gene delivery. Surface composition, charge, colloidal stabilities, associations with adenovirus, magneto-tranduction efficiencies, cell internalizations, in vitro toxicities and MRI relaxivities were tested for the(More)
The cell separator MCS-3P is an apheresis system offering the flexibility to collect standardized red blood cells, plasma, and/or platelets from one donor. Two different programs were used for the red cell apheresis--RBCP (collection of one unit of red cells and two units of plasma) and RBCPS (one unit of red cells and one unit of plasma). The quality of(More)
Hematological parameters and blood markers that indicate oxidative stress, such as lipid peroxides (LPO), reduced and oxidized glutathione (GSH, GSSG), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), were measured in 18 marathon runners before, immediately after the race, and after 8 days of rest. In parallel, the oxygen radical generation(More)
The effect of a 12-week diet of freshwater fish on fatty acid composition of the erythrocyte membrane, RBC deformability and artificial aggregation behavior of erythrocytes was studied in 20 healthy subjects. A different quantity of meals containing fish per week (control group, 1.5 and 3.8 fish meals per week) resulted in an increased content of n - 3(More)
By means of a laser-interferometrical method diffusion layers at the interface of a noncharged cellulose membrane are studied. These layers are induced by a concentration difference between the NaCl solutions separated by the membrane. The temporal and local shift of the NaCl concentration in the diffusion layers were measured. A steady-state concentration(More)
Velocity profiles of human blood flowing through vertical and horizontal glass tubes (25-100 microns ID) were measured as a function of time following a sudden reduction of wall shear stress (tau w) from a high value to values ranging from 2 to 100 mPa. Cell velocities at various radial positions were determined off-line from video recordings by digital(More)
In seven healthy subjects acidosis was induced by NH4Cl, by CaCl2 or by acetazolamide (diamox). The response of respiratory minute volume to inhaled CO2 mixtures was studied in control and acidosis experiments. The arterial and endexpiratory CO2-tensions were determined simultaneously. The respiratory minute volumes were plotted against arterial or alveolar(More)