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Environmental quality objective: guide value or narrative statement, which it has been established as a limit specifically to a receiving body in a certain place, in order to protect and maintain selected uses of air, water and/or soil in said place based on environmental quality guide levels and considering the particular conditions of the aforementioned receiving body.
Ohmio. Unit of electrical resistance equivalent to the resistance of a conductor in which a potential difference of 1 volt produces a current of 1 ampere Abbreviation W.
Pipeline. Transportation infrastructure for liquid petroleum products.
OMG: Genetically Modified Organism. Any organism whose genetic material has been modified in a way that does not occur naturally through mating (multiplication) or in natural recombination. They are classified as high risk or low risk, taking into account its nature, to that of the receiving or parenteral organism, and to the characteristics of the vector and the insert used in the operation.
Ortoimagen. Geometrically corrected photographic image on which measurements can be made to its scale.
Osmosis inversa. Migration of water molecules through a semipermeable membrane from concentrated solution to dilute solution, under a pressure greater than the osmotic pressure. In normal osmosis, in which no external pressure is applied, water circulates through the semipermeable membrane (membrane that allows the passage of solvent molecules, but not solute) from dilute solution to concentrated solution. Reverse osmosis allows salts to be separated from water, Therefore, it is used industrially in the desalination of water in water treatment plants.
Oxidability. Oxidation propensity, which is a chemical reaction by which a substance releases electrons.
Nitrogen oxides. Nitrogen combustion products, brownish red (NO and NO2). NOx formula.
dissolved oxygen. Molecular oxygen incorporated into water in the liquid phase. The solubility of oxygen in water depends, in addition to its partial pressure, from the temperature. The concentration of dissolved oxygen in natural waters is crucial for aquatic animals that use it for respiration.
Molecular oxygen. It is a gas that is among the majority components of the atmosphere (21% in weigh). It has an oxidizing character, It intervenes in combustion and is essential in the energy production processes of aerobic cells in which it functions as an electron acceptor.. O2 symbol.
Ozone. Triatomic oxygen molecule, naturally present in the upper layers of the atmosphere. Ozone is a substance with industrial applications, whose release into the atmosphere near the surface can be considered a contaminant. Formula O3