Method of determination of aerosol microparticles' size distribution by iteration process

Abstract

The determination algorithm of aerosol microparticles` size distribution by iteration process is described. In the described method the particle, registered by optoelectronic devices is characterized by parameters of amplitude and duration of impulse. Distribution of particles` size is determined from the measured functional dependence of number of registered particles from amplitude and duration of the proper electric impulses on the output photo-detector. Given dependence, within limits of statistical errors, is repeated when performing measurement series in the medium with identical optical parameters. It is linked by functional dependence to relative particles' fraction of different sizes, which is expressed by integral first kind Fredholm equation.

Rapid detection of bacterial cells by light scattering method

“…The research of changes of light scattering by particles in prepared solutions of liquid growth media and solution Escherichia coli in a liquid growth media during 6 hours with an interval of 1 hour. Determination of light scattering by cellular suspensions was performed on laser microparticle analyzer PRM-6 [26]. Preliminary preparation of test which consisted in the following was conducted.…”

“…F U t is measured value, ( , , ) K U t r is the kernel function, which depends on the photoreceiver registers the array of impulses with amplitudes U and durations t, measuring, r is a size parameter, ( ) n r is the size distribution function, n(r)dr is the number of particles in the size range[ , ] The algorithm of the solution of Fredgholm integral equation(6) are presented in[24,25].3. PROCEDURE OF MEASURINGDetermination of quantity of bacterial cells in the process of their cultivation is achieved by conducting of by turn researches of time-domain measurements of light scattering parameters of liquid growth media which the bacterial cells are cultivated in, with cellular objects, and without them.…”

Light scattering application for bacterial cell monitoring during cultivation process

“…Determination of light scattering by cellular suspensions was performed on laser microparticle analyzer PRM-6[18]. Preliminary preparation of test which consisted in the following was conducted.…”