The physics principle of registration immune reaction by light scattering methods is concerned. The operation of laser nephelometry for measuring antigen-antibody reaction is described. The technique of obtaining diagnostic and immune reactions of interaction latex agglutination for diphtheria determination is described.

Microbial fuel cell (MFC) technologies represent the newest approach for generating electricity -bioelectricity generation from biomass using bacteria. Desulfuromonas acetoxidans are aquatic obligatory anaerobic sulfur-reducing bacteria that possess an ability to produce electric current in the processes of organic matter oxidation and Fe 3+ -or Mn 4+ -reduction. These are pattern objects for MFC systems. They could be applied as a highly effective and self-sustaining model of wastewater treatment which contains energy in the form of biodegradable organic matter. But wastewaters contain high concentrations of xenobiotics, such as different heavy metals that have a detrimental effect towards all living organisms. The influence of different concentrations of MnCl 2 ×4H 2 O, FeSO 4 CuSO 4 , CdSO 4 , ZnSO 4 and PbNO 3 on light scattering properties of aquatic D. acetoxidans bacteria on the base of their cells' size distribution and relative content has been investigated by the new method of measurement. The cell distribution curve was in the range of 0.4 -1.4 µm. The most crucial changes of cell concentration dependences, compared with other investigated metal ions, have been observed under the influence of copper ions. The ability of D. acetoxidans bacteria to produce electric current upon the specific cultivation conditions and the influence of Fe 2+ and Mn 2+ has been verified.

Device for registration of bacterial cells it is possible to examine as an information task which is characterized by a priori vagueness of moment of appearance of prototype system in the area of their registration. These reasons do not allow to provide exactness measuring on the base of measuring charts, functioning of which is provided structurally, and require the program hardware methods of measuring. An effective decision of this task is possible subject to condition application of the adaptive, program-driven methods, realized on the base of the fast-acting specialized charts of high integration. A new device for registration of bacterial cells in liquid medium after the changes of them size distributing is described. Procedure of registration of bacterial cells consists in dissociating of signal from noises, amplitude and duration measurement of the proper electric impulses. The process of registration particles in real-time imaging the screening on monitor of the personal computer. The developed software allows estimating the size distributing of the explored objects and their concentration in a liquid medium in 3D-imaging. There possibilities of device from registration and visualization of bacterial cells of different nature are presented.

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A implementation of universal intellectual device for the determination ofgranular composition of liquids pollution by mechanical including and microparticles has been consider. Our device is applicable to liquids with different optical characteristics like wother, oil, fuel etc. The principle of working an instrument is based on the real time acquiring information about light beam propagation in measuring optical channel and optimal data processing. Application of a perspective mixed-signal RISC-controller (Microchip) gives us possibility to create a highperformance unit with a flexible adaptive structure and wide range adjustable measuring tract. Inner links between ftinctional parts ofthe unit should be dynamically changed.