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Deformation Control and Mass Transfer in the Tunic of Halocynthia roretzi

机译：Halocynthia roretzi外套的变形控制和传质

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Background:It has been previously reported that the tunic of Halocynthia roretzi, mainly composed of cellulose, is actively deformed with mass transfer by the mechanical stimuli.Objective:In this study, how the tunic deforms in response to the mechanical environment was investigated.Method:The tunic specimen in the artificial seawater was still at 5?C or underwent the mechanical stimuli at the temperature less than 10?C. The mass and moisture content of the tunic, the concentrations of nitrate and dissolved organic matter in the artificial seawater used for the tunic, and the histological characteristics were evaluated.Results:The increase in mass of the tunic became lower as the region was closer to the bottom of Halocynthia roretzi. However, the decrease in mass caused by the mechanical stimuli was not different between the adjacent regions. Also, the tunic of the siphon, the tubular tissue for influx and efflux of the seawater, increased the mass more slowly after the stimuli. The size of the layer covering the outside of the tunic was inversely related to the increment in mass. The change in mass was corresponding to that in water content. The concentrations of nitrate and dissolved organic matter in the artificial seawater were enhanced 5 days after the stimuli while the concentration ratio of dissolved organic matter to nitrate was kept constant.Conclusion: The water content in the tunic was used for controlling the mass response to the mechanical environment.
机译：背景：以前已有报道称，主要由纤维素组成的罗汉子（Halocynthia roretzi）的外衣在机械刺激下随着传质而发生主动变形。目的：研究这种外衣如何响应机械环境而变形。 ：人造海水中的中山药标本仍在5？C或在低于10？C的温度下受到机械刺激。评价了外套的质量和水分含量，用于外套的人造海水中硝酸盐和溶解的有机物的浓度以及组织学特征。结果：随着区域的增加，外套的质量增加变小。 Halocynthia roretzi的底部。但是，由机械刺激引起的质量下降在相邻区域之间没有差异。同样，虹吸管的上衣（用于海水流入和流出的管状组织）在刺激后增加质量的速度更慢。覆盖外衣外部的层的尺寸与质量的增加成反比。质量的变化与水含量的变化相对应。刺激后第5天，人造海水中硝酸盐和溶解有机物的浓度增加，而溶解有机物与硝酸盐的浓度比保持恒定。结论：外衣中的水分用于控制对海水的质量响应。机械环境。

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