It has been shown that when drops fall on a solid surface, the physicochemical properties of water change. After drops fall on a solid surface, water saturated with atmospheric gases luminesces in the blue region of the spectrum. The luminescence intensity decreases exponentially after exposure. The concentration of gases (molecular oxygen and carbon dioxide) in water decreases. In this case, both the size and the number of nano-sized gas bubbles in the water do not change. It has been established that when drops fall on a solid surface in water saturated with atmospheric gases, hydrogen peroxide and hydroxyl radicals are formed. As the fall height increases, the intensity of generation of hydrogen peroxide and hydroxyl radical increases. The formation of hydrogen peroxide is probably associated with two independent mechanisms.

The concentration of hydrogen peroxide and hydroxyl radicals in dependence of the intensity (strength) of water drop impact on a solid surface has been measured. The intensity was varied by changing the fall height from 1 to 4 m and the tilt angle of the surface onto which drops fell. It is shown that the content of hydrogen peroxide and hydroxyl radicals in solution increases after the drop impact on the solid surface. Apparently, the main mechanism of the observed effects is the generation of singlet oxygen and its further reduction.

The influence of the solution acidity on the interaction between bovine serum albumin (BSA) molecules and gold nanoparticles in solutions has been investigated by absorbance spectroscopy, fluorescence spectroscopy, and dynamic light scattering (DLS). The influence of pH on the processes of aggregation–disaggregation of gold nanoparticles with BSA and without it and on the denaturation of protein solution is demonstrated. It is also shown that BSA molecules can stabilize gold nanoparticles at acidic pH values of 2.0–4.0. The data obtained can be useful for physiologists studying the influence of nanoparticles on different biological media of the body.

The fragmentation of colloidal gold solution in pure water by nanosecond Nd:YAG laser radiation is found to be characterized by a threshold value of nanoparticle concentration, below which the colloidal solution remains stable. Above the threshold, large agglomerates of particles are intensively formed in the colloidal solution; this process manifests itself both in the absorption spectra and in the particle-size distribution. It is shown that the limiting concentration depends linearly on the average size of gold nanoparticles. The critical concentration for 7-nm nanoparticles is approximately 2 × 10 11 mL –1 , whereas the corresponding concentration for nanoparticles 17 nm in diameter is an order of magnitude lower: 2 × 10 10 mL –1 .

The effect of a static magnetic field with induction up to 7 T on the concentration of dissolved molecular oxygen, the concentration of hydrogen peroxide, the redox potential, and the electrical conductivity of aqueous solutions with a low concentration of active impurities is studied. It was shown that the concentration of dissolved molecular oxygen in water under the exposure of a magnetic field with induction up to 7 T does not change significantly, while the concentration of hydrogen peroxide increases linearly. It has been established that the pH value of water with field amplification in this induction range tends to decrease within 10%. With an increase in induction, an increase in the redox potential of water is observed. The change in its value is approximately 7 mV/T. It was shown that, with an increase in induction up to 2 T, the electrical resistivity of the water under study drops to about 0.6 MΩ cm, while at higher values of induction it practically does not change.

The purpose of this investigation is to create a scientific basis and technology of the production of fluoropolymer photoconversion films for greenhouses to improve the performance of greenhouses in the area of risk farming. The aim basis of photoconversion technology in greenhouses is reduced to photoconversion of UV radiation into blue-violet, and green and yellow light into red light necessary for plants. In other words, when sunlight passes through fluoropolymer photoconversion films, the intensity of the blue-violet and red regions of the spectrum should increase, and the intensity of the UV, green and yellow regions of the spectrum should drop. The article presents the manufacturing technology of fluoropolymer photoconversion films and examples of its use in greenhouses.