دورية أكاديمية
Active Movement of the Tunic in Halocynthia roretzi
| العنوان: | Active Movement of the Tunic in Halocynthia roretzi |
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| المؤلفون: | Yoko KATO |
| المصدر: | Journal of Biomechanical Science and Engineering, Vol 5, Iss 2, Pp 163-174 (2010) |
| بيانات النشر: | The Japan Society of Mechanical Engineers, 2010. |
| سنة النشر: | 2010 |
| المجموعة: | LCC:Science LCC:Mechanical engineering and machinery |
| مصطلحات موضوعية: | nervous system, myocyte, α-smooth muscle actin, elastic fiber, tunic, Science, Mechanical engineering and machinery, TJ1-1570 |
| الوصف: | Halocynthia roretzi, a solitary ascidian, can swell and deflate its solid, leather-like tunic largely, but it is not clear whether the tunic deforms actively. Cellulose Iβ, which is predominant in higher plants, is also present in the tunic as a highly crystalline form. The elastic modulus of its whisker crystalline is considerably high. Substantial amounts of chitin sulfate-like, water-soluble polysaccharide were also present. These polysaccharides alone would barely cause tunic deformation. If the tunic's flexible deformation is self-controlled, it would have another element in addition to the polysaccharide, and it would be an ideal model for designing a novel material. The hypothesis of this study was that the H. roretzi tunic has a nervous system, myocytes, and elastic fibers controlling its flexible deformation. Using acetylcholine and touch as stimuli, the tunic samples were found to deform at acetylcholine concentrations ≥20 µM, indicating the existence of a nervous system, and to have mechanosensitivity. The Bodian, Klüver-Barrera, acetylcholinesterase, immunohistochemical (α-smooth muscle actin), and Elastica-Masson staining methods indicated the presence of a nervous system, myocytes, a region rich in α-smooth muscle actin, and elastic fibers, validating the hypothesis. The self-controlled system in the tunic is useful to understand the properties of the tunic and to design a novel actively deforming material. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1880-9863 |
| العلاقة: | https://www.jstage.jst.go.jp/article/jbse/5/2/5_2_163/_pdf/-char/enTest; https://doaj.org/toc/1880-9863Test |
| DOI: | 10.1299/jbse.5.163 |
| الوصول الحر: | https://doaj.org/article/65167e256b90499282555ca89d4c4f91Test |
| رقم الانضمام: | edsdoj.65167e256b90499282555ca89d4c4f91 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 18809863 |
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| DOI: | 10.1299/jbse.5.163 |