## 4 Discussion
The data on the stimulation of the generation and accumulation of charge in relative units (i.e., relatively to the charge generated in the absence of the investigated material), obtained when the investigated material was placed near the injector nozzle, are summarized in Table 1.  
As seen from Table 1, the mica chip placed near the injector caused an increase in efficiency of generation and accumulation of charge in the measuring cell (by 28% at \(l\) = 4 mm). It is known that the mica surface was charged negatively, and our experiments demonstrated that this charge was about \(-\)16 nC. The differences between \(\Delta q(t)\) curves obtained in the presence of mica can be connected with causes of quantum-mechanical effects of transitions of ortho-para states of water near the critical point in external electromagnetic field. Upon the motion of water, an additional interaction of charged particles in water with the electric field occurs. This can lead to a number of effects, including additional effects on the motion of charged particles in water, and additional stimulation of transitions between ortho- and para-states of water. At that, with increasing \(l\) from 4 mm to 1 cm, this efficiency decreases twofold, to 14% (Figure 3). We have measured the charge of an empty polypropylene tube, and it appeared to be of the same order of magnitude, \(-\)24 nC. As seen from Table 1, the presence of a polypropylene tube also causes an increase in efficiency of generation and accumulation of charge (by 204% at \(l\) = 1 cm). The diameter and the length of the polypropylene tube were 28 mm and 120 mm, respectively, while the dimensions of the mica chip were 25 mm \(\times\) 75 mm. That is, despite the dimensions of these materials being similar, the presence of the polypropylene tube caused a more pronounced effect. This is possibly connected with different electric field distribution near the injector caused by the difference in the materials' geometry, and accordingly, by the different capacity of the material/water-filled injector system. It is interesting to point out that filling of the polypropylene tube with water led to a decrease in the efficiency of charge accumulation in the measuring cell by almost an order of magnitude. Charge measurements in the system with the polypropylene tube have indicated that the value of charge accumulated in the cell also decreased by about an order of magnitude (from \(-\)24 nC to \(-\)5 nC). Accordingly, with decrease in the charge, which induces external electric field, from \(-\)24 nC to \(-\)5 nC, the influence of the electric field on the motion of charged particles in water decreases, and this leads to the observed effects. The system with the ethyl alcohol-filled polypropylene tube had a charge about \(-\)5 nC, and the effect of such tube was approximately equal to that caused by water-filled tube. When the tube was filled with \(10^{-4}\) M protein solution (whose concentration is approximately equal to the protein concentration in human blood [20]), the increase in the efficiency of charge accumulation in the measuring cell was approximately of the same level, as in the case of the tube filled with pure water. Here, it is to be noted that the charge of the polypropylene tube filled with protein solution was at the same level (\(-\)6 nC). Thus, one can conclude that the efficiency of generation and accumulation of charge in the measuring cell during the flow of liquid through the injector is influenced by the charge state of neighboring non-conductive mica and polymer surfaces: the efficiency of the generation of charge and its accumulation in the measuring cell increases with the increase in the value of negative charge of these surfaces. At that, the change in the capacity of the system in the presence of these surfaces also matters. Comparative experiments with protein solution and with water were carried out in eight sets. In all these sets, an effect of stimulation of the charge accumulation in the measuring cell has been observed in the presence of protein in water.