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Definiciones

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Principales elementos en la bi

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Definiciones

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    1. Definiciones Ciclo: Secuencia de cambios que, una vez completados, produce un estado final idntico al original. Material: Sustancia(s) de la(s) cual(es) esta compuesto un objeto. Sustancia: Materia cuya composicin qumica es conocida. Elemento: una de las 116 sustancias conocidas que no pueden separarse en sustancias mas simples mediante mtodos qumicos.

    4. Ciclos biogeoqumicos

    23. Fijacin antrpica del nitrgeno

    24. Transferencias terrestres-acuticas de N derivadas de la actividad humana

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