Betacoronavirus the Latin “corona” meaning crown or halo, referring to their image under electron microscopy of crown-like spikes on their surface similar to the solar corona. This morphology is created by the viral spike (S) peplomers, which are proteins that populate the surface of the virus and determine host tropism. The order Nidovirales is named for the Latin nidus, which means nest. It refers to this order’s production of a 3' co-terminal nested set of subgenomic mRNA's during infection. Betacoronavirus Betacoronaviruses are one of four genera of coronaviruses of the subfamily "Coronavirinae" in the family "Coronaviridae", of the order "Nidovirales". They
Wastewater discharge standards in Latin America that produces a contamination on the water. In the case of the discharge over sewer systems the regulation is under the Chapter IV. It's stated that every company must agree with the company that provides the service of recollection of wastewater, the limits of discharge. The limits presented in this article, are those for new companies and for companies in process of identification of the type of body water that the company will discharge. Case description In August 2003, all the mining producers working in the city of Potosí must discharge their waste waters to a specific dike; otherwise they