Tag Archives: microorganisms

The Natural World of the Human Mouth

According to scientists, the number of species of microorganisms that permanently reside in the human oral cavity amounts to 200-500. Of those, only fifty are named and studied. They have various looks: balloons, ovoids, bacilli, those that look like corn on the cob, bottle brushes, spirals, zippers, etc. What of the inhabitants of the mouth are our enemies, and what are friends?

(more…)

Read More

Soil pollution from PCBs

These are compounds that were produced as industrial chemicals (man-made organic compounds, synthetic) and used in lubricating oils, paints, in carbonless copy paper (non-carbon copy paper – an alternative to carbon paper), in electrical insulators and in many other industrial and commercial products.

(more…)

Read More