Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen
Dogfish egg case is an elongated and leathery, oblong shaped vessel made up of collagenous-composite structure. Being an oviparous species, female dogfish sharks lay their eggs in the open water environment, protected only by its egg case. Despite its small size, embryos are able to be fully...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2012
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| Online Access: | http://hdl.handle.net/10356/48406 |
| _version_ | 1826111793001398272 |
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| author | Teh, John Wei Ming |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Teh, John Wei Ming |
| author_sort | Teh, John Wei Ming |
| collection | NTU |
| description | Dogfish egg case is an elongated and leathery, oblong shaped vessel made up of collagenous-composite structure. Being an oviparous species, female dogfish sharks lay their eggs in the open water environment, protected only by its egg case.
Despite its small size, embryos are able to be fully developed under extreme temperature changes and are resilient against most predators. The egg case is of interest because of its toughness, elasticity and its ability to simultaneously regulate the diffusional flow of small molecules and ions in and out of itself with ease.
This study seeks to investigate the chemistry of dogfish egg case cross-links. Based on results obtained from Raman spectroscopy tests, Electron Dispersive X-ray (EDX) mapping and cross-link isolation on the dogfish egg case, we have found evidences that: 1) Catecholic (aromatic) side-chains were involved in cross-linking and 2) Metal ions were involved and believed to form coordinate complexes with catechols.
Suggestions for dogfish egg case cross-links were thereafter proposed based on analysis from experimental results and literature. |
| first_indexed | 2024-10-01T02:56:39Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/48406 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:56:39Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/484062023-03-04T15:32:52Z Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen Teh, John Wei Ming School of Materials Science and Engineering Biological & Biomimetic Material Laboratory @ NTU Ali Gilles Tchenguise Miserez DRNTU::Engineering::Materials::Biomaterials Dogfish egg case is an elongated and leathery, oblong shaped vessel made up of collagenous-composite structure. Being an oviparous species, female dogfish sharks lay their eggs in the open water environment, protected only by its egg case. Despite its small size, embryos are able to be fully developed under extreme temperature changes and are resilient against most predators. The egg case is of interest because of its toughness, elasticity and its ability to simultaneously regulate the diffusional flow of small molecules and ions in and out of itself with ease. This study seeks to investigate the chemistry of dogfish egg case cross-links. Based on results obtained from Raman spectroscopy tests, Electron Dispersive X-ray (EDX) mapping and cross-link isolation on the dogfish egg case, we have found evidences that: 1) Catecholic (aromatic) side-chains were involved in cross-linking and 2) Metal ions were involved and believed to form coordinate complexes with catechols. Suggestions for dogfish egg case cross-links were thereafter proposed based on analysis from experimental results and literature. Bachelor of Engineering (Materials Engineering) 2012-04-17T06:24:11Z 2012-04-17T06:24:11Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/48406 en Nanyang Technological University 50 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Biomaterials Teh, John Wei Ming Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title | Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title_full | Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title_fullStr | Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title_full_unstemmed | Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title_short | Shark egg-case cross-link chemistry : biomimetic model of densely cross-linked collagen |
| title_sort | shark egg case cross link chemistry biomimetic model of densely cross linked collagen |
| topic | DRNTU::Engineering::Materials::Biomaterials |
| url | http://hdl.handle.net/10356/48406 |
| work_keys_str_mv | AT tehjohnweiming sharkeggcasecrosslinkchemistrybiomimeticmodelofdenselycrosslinkedcollagen |