The study showed that the property of grain triboelectrification relates to grain moisture, friction velocity, dielectric constant and friction material.
The results show that high pinning field could be obtained with appropriate thickness and magnetocrystalline anisotropy constant of cell boundary phase.
Various substance has very small autoprotolysis constants which,however,has more large difference,so that the amphoteric solvents are found more wide application in titrimetric analysis.
When the illuminance rose, the photic decomposition rates of the natural anthocyan pigments rose as well, but there was no linear relation between photic decomposition rate and illuminance.