Application In Synthesis of Piperidine-3-carboxylic acid. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Piperidine-3-carboxylic acid, is researched, Molecular C6H11NO2, CAS is 498-95-3, about Adaptive Mechanisms of Baroreflectory Regulation of the Cardiovascular System in Extreme Hyperoxia. Author is Zhilyaev, S. Yu.; Platonova, T. F.; Alekseeva, O. S.; Nikitina, E. R.; Demchenko, I. T..
We hypothesized that all of these responses are components of the baroreflex that regulates blood pressure and circulation in hyperoxia. To test this hypothesis, we carried out experiments on awake rats in which the dynamics of arterial blood pressure, organ blood flow (brain, kidney, lower limbs) and ECG was tracked in response to oxygen breathing at 1, 3 and 5 ATA. The afferent and efferent baroreflex pathways were studied using denervation of the carotid baroreceptors and transection of the aortic depressor nerves and vagus nerve. The baroreflex effectiveness was assessed using phenylephrine injections or spontaneous changes in blood pressure. To activate the GABAergic system, nipecotic acid was injected into the lateral ventricle of the brain. Bradycardia and a decrease in cardiac output, resulting from baroreflex activation by hyperoxia, are actualized via efferent sympathetic and parasympathetic pathways. At 1 and 3 ATA the baroreflex effectiveness increased compared to atm. air breathing, but extreme hyperoxia (5 ATA) suppressed the baroreflex mechanism. Activation of the GABAergic system in the cerebral cortex by nipecotic acid prevented the loss of the hyperoxic baroreflex. In hyperoxia, the baroreflex mechanism realizes adaptive responses of the cardiovascular system aimed at restraining the delivery of excess oxygen to an organism and mitigates activation of the sympathetic nervous system.
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Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics