Esteroides definicion pdf

Por sí solos ninguno de estos síntomas indica que alguien está tomando esteroides anabólicos, pero podrían alertar a los padres y a los entrenadores sobre la posibilidad de que el abuso de la droga está ocurriendo. Hay pocas enfermedades médicas en la juventud en las que la prescripción médica de testosterona es apropiada e indicada; el uso apropiado de testosterona no debe causar ninguno de los síntomas físicos enlistados arriba. El uso sin autorización médica de esteroides anabólicos plantea un peligro grave. La posesión y distribución de los esteroides anabólicos para propósitos no médicos, es ilegal bajo la ley federal, porque los esteroides están clasificados como una droga Programa III bajo el Controlled Substances Act.

Steroid isolation , depending on context, is the isolation of chemical matter required for chemical structure elucidation, derivitzation or degradation chemistry, biological testing, and other research needs (generally milligrams to grams, but often more [37] or the isolation of "analytical quantities" of the substance of interest (where the focus is on identifying and quantifying the substance (for example, in biological tissue or fluid). The amount isolated depends on the analytical method, but is generally less than one microgram. [38] [ page needed ] The methods of isolation to achieve the two scales of product are distinct, but include extraction , precipitation, adsorption , chromatography , and crystallization . In both cases, the isolated substance is purified to chemical homogeneity; combined separation and analytical methods, such as LC-MS , are chosen to be "orthogonal"—achieving their separations based on distinct modes of interaction between substance and isolating matrix—to detect a single species in the pure sample. Structure determination refers to the methods to determine the chemical structure of an isolated pure steroid, using an evolving array of chemical and physical methods which have included NMR and small-molecule crystallography . [2] :10–19 Methods of analysis overlap both of the above areas, emphasizing analytical methods to determining if a steroid is present in a mixture and determining its quantity. [38]

Esteroides definicion pdf

esteroides definicion pdf

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