Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"fish scales"”.
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Heterogeneous Distribution and Corresponding Mechanical Significance of The Mineral Phase in Fish Scales
Fish scales can be considered as a laminated composite based on collagen fibrils arranged in a cross-plywood structure. This collagen-based composite is often partially mineralized (primarily hydroxyapatite) in the scale exterior in order to resist penetration and hence to enhance protection. …
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Fish scales as ecological indicators: empirical approaches to improve their practical application to fish ecology
The collection of scales is common when fish communities are sampled within research and monitoring programmes in freshwater fisheries. Although used primarily to age individual fish, there is increasing evidence of their potential for application to other ecological methods, yet there is also …
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An assessment of the use of nuclear microprobe techniques in pollution studies : quantification of elemental concentrations in fish scales
… the extent of water pollution by analyzing scales of fish that live in polluted waters. As a fish grows, ions from its immediate environment are incorporated into the matrix of the fish scale and so scales can be used as biomarkers of pollution events.
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Design of flexible puncture resistant gloves inspired by natural dermal armors
… the puncture resistance and flexibility of fish scale structures. Elasmoid fish scales possess a unique balance of stiffness, strength and low weight to provide protection against predators and not interfere with locomotion. In this investigation the biological design of fish scales is …
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Applications of fish scale analysis to understand growth dynamics of fish populations
… to derive ecological information about fish populations is a fundamental tool in fisheries assessment, specifically the back-calculation of fish lengths. This study highlights the potential errors associated with correction factors (c) because of poor sampling and provides a validation …
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An assessment of the reliability of fossil pilchard and anchovy scales as fish population indicators off Namibia
Fossil fish scales hold potential for ellucidating past fish population fluctuations. A system of classification for scales from the pilchard, Sardinops ocellata, and the anchovy, Engraulis capensis, is presented. Both species show an unexpected range of scale types. The classifications reduce …
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Investigation of novel electroactive morphing concepts for aerodynamic performance increase of an A320 wing through High-Fidelity numerical simulation
… for the design of a “live-skin”. Bio-inspired by fish scales and bird feathers, this concept consists of an innovative moving interface between the lifting structure and the surrounding turbulence by means of large DoFs of the actuators composing the morphing system. The Organised Eddy Simulation …
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Preparation and characterization of natural hydroxyapatite from tilapia bones and scales for biomedical applications
… from Tilapia (Oreochromis niloticus) bones and scales were successfully extracted by calcination technique in neutral atmosphere. In order to produce HA with close composition to human bone, the calcination parameters such as temperatures, holding time and heating rate were manipulated. Results …
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Optimization of heterogeneous bio-based catalysts and synthesis of inorganic equivalent for large-scale biodiesel production
… for waste resources, waste eggshells, cow bones, fish scales and banana peels were investigated, characterized and optimized to manufacture high performing Lewis base catalysts to obtain high biodiesel yield in a transesterification reaction. Initially eggshell, fish scale and cow bone catalysts …
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The efficacy of back calculation methods for determining length at age data and the use of such data to determine growth standards, national growth patterns and recruitment dynamics of roach (Rutilus rutilus (L.)), dace (Leuciscus leuciscus (L.)) and chub (Leuciscus cephalus (L.)) in UK rivers
The use of fish scales to age and back-calculate previous lengths at age and gain age and growth information has long been used as a management tool in fisheries. Calcified structures from fish, including otoliths, fin rays, and vertebrae have been used to gain length at age data. Scales however, …
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Bulk Ceramic-Based Biologically Inspired Composites: Design, Fabrication and Testing
… progression of damage. Also, taking cues from fish scale ultrastructures, we design three-phase ceramic-epoxy-fiber composites. The fish scales feature gradient architectures with varying biomineralization extents from the distal to proximal regions (with respect to the fish body). From …