There is something simple aparentementemas than water? Despite its apparent simplicity esteliquido that we know so well is complex and understand todaviano well.The water is equipped with a few exceptional chemical propiedadesfisico that constitute its specificity. Comopone manifesto estearticulo, the estructuramicroscopica of liquid water, which is inthe base of estaspropiedades, esun theme research may contribute algunasnovedades. Water is one of the four ‘elements’ which the Greek philosopher Aristotle had defined as constituent of the universe (the others are the air, Earth and fire). Even today it is not that we better understand. Given our familiarity with the water, the fact no longer surprising. Oceans, lakes, rivers, rainfall; abundant in nearly all the regions of the Earth, the water determines largely the landscapes and climates. Very often is synonymous with life: water is an essential component of the structure and metabolism of all living beings.
Certainly, the primary role of the water should not be attributed to random but that derives from its exceptional physical and chemical properties. An example of biologically important property of water is their hydrophobic effect, i.e. the fact that CH hydrocarbon groups tend to be repelled by water molecules. This effect is responsible, in part at least, of the complex spatial structures that present proteins, DNA and the bi-layers imminuta of cell membranes. In the absence of water, all of these structures would be unstable. It should be even, without too much risk of error, that this effect could play a decisive role in the emergence of life on Earth to say.
But the hydrophobic effect is not the only interesting property of water. In what follows we will find others. Why is water a chemical so privileged? The answer, of course, found in the molecule and their interactions with the environment. The water molecules are relatively well known, but interactions that are set out in a group of water molecules as they are less.continue reading