article_snippet.sent: Using enzymes that digest muscle and fat, Previous researchers cleaned the reaction chamber, which enabled Previous researchers to examine it under a microscope.
article_snippet.sent: While studying the shape of the reaction chamber, Previous researchers noticed that some regions of the chamber wall were thin and not as strong as others, and that one region near the mixing valve looked particularly thin.
article_snippet.sent: Previous researchers predicted that this thin cuticle would be displaced by the force of the reactions in such a way that it would impinge upon the valve - temporarily shutting off the flow of reactants.
article_snippet.sent: Each explosion inside the chamber forces a highly elastic region of the chamber wall - the thin cuticular area Assistant Professor Moore found in Assistant Professor Moore earlier dissections - to expand and impinge on the valve that separates the two chambers, temporarily cutting off the flow of reactants and resulting in a pulsed delivery. '
article_snippet.sent: It turns out the expansion membrane of the reaction chamber acts as a passive closure mechanism, which is something that had not been described or even predicted before this study,' Assistant Professor Moore said. '