## 2 Results  
We observed changes in a number of physicochemical parameters upon dilution of a NaCl solution with deionized water. First, we investigated the effect of diluting a NaCl solution with deionized water on pH value (Figure 1A). Deionized water had a pH of approximately 5.1 and the pH of a 1 M NaCl solution was 5.7. When the NaCl solution was diluted to a concentration of 1 mM, the pH value decreased to 5.1. Further dilution had no significant effect on the pH of the NaCl solution. Second, we studied the change in the redox potential of a NaCl solution upon dilution with deionized water (Figure 1B). We determined that the redox potential of a 1 M NaCl solution was 265 mV, for a 1 mM NaCl solution it was 380 mV, and a 0.1 mM solution 425 mV. The latter roughly corresponds to the redox potential of deionized water. No significant changes in the redox potential were registered after further dilution of the NaCl solution. Third, we measured molecular oxygen concentration in NaCl solutions upon dilution with deionized water (Figure 1C). The concentration of molecular oxygen in a 1 M NaCl solution was 7.7 mg/L. After dilution of the 1 M sodium chloride solution, the concentration of molecular oxygen increased. When the concentration of NaCl reached 10\({}^{-5}\) M, the molecular oxygen concentration stopped increasing. The molecular oxygen concentration remained unchanged after the NaCl solution was diluted further. Figure 1: Change in pH (**A**), redox potential (**B**) and molecular oxygen concentration (**C**) when diluting a sodium chloride solution with deionized water. Data are presented as means and standard errors of the mean (n = 6–12). It should be noted that the intensive shaking and stirring performed when mixing and preparing samples of the solutions to the required concentration have a significant effect on the concentration of dissolved molecular oxygen (Figure 2). It is known that in water saturated with atmospheric gases, the concentration of molecular oxygen reaches 8.7 mg/L at 22 \({}^{\circ}\)C [30]. In this case, the concentration of molecular oxygen in water can easily be reduced by passing atomic nitrogen through the water [31]. As can be seen from Figure 2, after shaking oxygen-depleted water for 1 min in the presence of atmospheric gases, the concentration of molecular oxygen in the water significantly increased due to transfer from the air. At the same time, after mechanical action on water containing the equilibrium concentration of molecular oxygen, degassing is observed. In other words, the concentration of molecular oxygen can decrease with mechanical action. Usually, a decrease in the concentration of molecular oxygen dissolved in deionized water by 2-4% is registered. In general, it is necessary to be extremely careful when measuring the concentration of molecular oxygen after mechanical action on water and aqueous solutions. Thus, we showed that NaCl solutions have properties significantly different from deionized water at NaCl concentrations of between 0.01 and 1 M. At lower salt concentrations, the studied characteristics were quite close to those of deionized water. Next, we investigated the dependence of physicochemical parameters of 0.01, 0.1, and 1 M NaCl solutions on the magnetic field strength. We used deionized water as a control. Figure 3 shows the change in the pH value under the influence of a magnetic field in water and NaCl solutions. There was a tendency in all cases towards a decrease in the pH value with an increase in magnetic field induction. However, no significant changes in pH were recorded. Figure 2: The influence of mechanical action on the change in the concentration of molecular oxygen dissolved in water. The abscissa is the oxygen concentration in water before shaking, the ordinate is the oxygen concentration in water after shaking. Characteristics of mechanical impact: frequency 30 Hz, amplitude 3 mm, duration 1 min. Experimental data are indicated by dots. The line indicates the theoretical dependence in the absence of external influences.