Coherent Fluctuation Nephelometry: A Rapid Method for Urine Screening for Bacterial Contamination.

Express-test by the method of coherent fluctuation nephelometry for urine contamination was carried out on two prototype instruments with standard polystyrene photometric cuvettes. We analyzed 209 and 119 urine samples. Due to high sensitivity of the method, up to 50% negative samples were detected within 10 min by initial opacity and 90% negative samples were detected during 3.5 h by registration of the bacterial growth curves.

[Concentration-dependent effects of magnetic accumulation of ligand-binding microparticles and ferritin aggregates]. / Kontsentratsionnye éffekty magnitnogo osazhdeniia ligandsviazyvaiushchikh mikrochastits i aggregatov ferritina.

A method for measuring the magnetic susceptibility of microparticles of a suspension from the thickness of the layer deposited on the surface of a magnetized wire was developed. The magnetic accumulation was registered by means of a photodetector, by measuring the amplitude and spectrum of fluctuations of the intensity of scattered light. This was used as the basis for the development of a biosensor and biochips.