Translate the given Spanish text to English

Methods of preparing the copper compositions are also disclosed.
Tambien se describen metodos para preparar las composiciones de cobre.

A fish feed comprising conventional feed ingredients and glucosinolates is described.
SE DESCRIBE UN PIENSO PARA PECES QUE COMPRENDE INGREDIENTES CONVENCIONALES PARA PIENSO Y GLUCOSINOLATOS.

is reacted with Myrothicium bilirubin oxidase and the absorption of the resulting reaction mixt.

CALCULAR LA CONCENTRACION DEL COMPONENTE BUSCADO POR COMPARACION EN LA CURVA DE CALIBRADO.