Coopertativas mineras: dinamitas y contaminantes: análisis de los sistemas de producción de las cooperativas mineras de Oruro e incidencias en la problemática medio ambiental

Las cooperativas presentan problemas para cumplir con las disposiciones contenidas en la Ley de medio Ambiente, por falta de atención a este sector. Se tiene la esperanza de mejorar la calidad de vida deseada e ideada para seguir disfrutando de las maravillas que la naturaleza nos ha prodigado.

GABAergic drugs and lordosis behavior in the female rat.

Agents modifying GABAergic neurotransmission were administered to ovariectomized rats treated with different doses of estradiol benzoate (EB) + progesterone (P) or with EB alone. Hormone treatments were designed to induce an intermediate level of receptivity in order to be able to observe both stimulatory and inhibitory effects on lordosis behavior. Both the GABAA receptor agonist THIP and the GABAB receptor agonist baclofen inhibited lordosis behavior at doses from 20 and 5 mg/kg, respectively. The GABA transaminase inhibitor gamma-acetylen GABA (GAG) and the GABA agonist 3-aminopropanesulfonic acid had no effects, even when high doses were administered. The GABAA receptor antagonist bicuculline had no effect by itself nor did it block the effects of THIP. It is therefore suggested that the GABAA receptor is of slight importance in the control of lordosis behavior. No evidence could be found supporting the hypothesis that an interaction between P and GABA is important for hormone-induced receptivity. It does not appear likely that motor disturbances are responsible for the inhibitory effects of baclofen and THIP. The exact mechanism by which these drugs inhibit lordosis behavior is not clear at present.