El nitrógeno es un quÃmico que normalmente se encuentra en forma de gas. Para volverse lÃquido, el gas nitrógeno tiene que liberar grandes cantidades de calor y enfriarse hasta aproximadamente -200° Celsius.
El nitrógeno lÃquido se utiliza para destruir células que conforman tejidos enfermos o cancerosos. El tejido que ha sido congelado se seca y se desprende.
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