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At a video facility for the study of intravital brain microcirculation, we found that, after a course treatment with vascular peptide bioregulator, the microvasculature density of the pial tunic in old (22–24 months) rats increased by about 2.5–2.8 times; the constriction and dilative reactions of the pial arterioles increased after the application of noradrenaline and acetylcholine onto the brain...
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