Prof. Dr. Gunter M. Rothe, Institut for Allgemeine Botanik, Johannes Gutenberg University, Mainz, Germany
All organisms have a high water content when in an active state of life. The adult human body consists of approx. 70% water. Water molecules even represent approx. 99% of all the molecules which make up an adult body. Consequently nucleic acids, proteins, lipids, vitamins, hormones and all the other important molecules only account for approx. 1%. If plant organisms pass into a latent state of life, such as that found in seeds, then their water content drops to approx. 15%. On the other hand, a loss of 1 -2% water would pose a serious threat to the human body.
Water is able to dissolve more substances than any other solvent. It is particularly dense with exceptional surface tension and is an excellent heat reservoir. Most substances have a permittivity of between 1 and 8 while the figure for water is 80. As a result, ionisable substances dissolved in water ...