Investments in the opening of a training center with an area of 200 m2, designed to train 100-150 people per month, amount to about $13-15 thousand, the payback period is 6-10 months. The average return on investment is 30%. Monthly...
Every day, almost every person encounters stress, which negatively affects the nervous system (both central and autonomic). As a result of exposure to negative emotions, various diseases develop. Exactly...
Non-metals as trace elements. We paid great attention to the role of metals. However, it must be borne in mind that some non-metals are also absolutely necessary for the functioning of the body. SILICON Silicon is also...
In this section, pediatricians in an accessible language tell parents about the various manifestations, methods of treatment and prevention of childhood diseases.
Of the element with atomic number 31, most readers remember only that it is one of the three elements predicted and described in most detail by D.I. Mendeleev, and that gallium is a very fusible metal: in order to turn it into ...
