find a string contained in an attribute

Hi,

I want to know if it is possible to search for a string of characters inside an attribute for example I have the following table and values

cod_unidad |                 nombre_uni                 
------------+---------------------------------------------
          1 | Facultad de Ciencias Naturales y Matemática
          2 | Facultad de Ciencias Humanidades
          3 | Facultad de Ingeniería
          4 | Facultad de Agronomía
          5 | Oficinas Centrales
          6 | test


I want to retrieve all the rows where I find the word Ciencias for example. Is there a function or with select is possible to do it?

thanks in advance,

karina
El Salvador, Centroamerica
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