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 20 of 142 for “"feather"”.
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Studies on a monomer of feather keratin
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1954.
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Black reaction to "Bird of the Iron Feather"
Thesis (M.A.)--Michigan State University. Dept. of Television and Radio, 1972
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Beak and feather disease virus candidate vaccine development
[Fix supervisors field.] Psittacine beak and feather disease, caused by a circovirus known as beak and feather disease virus (BFDV), is a threat to both wild and captive psittacine species. There is currently no vaccine against BFDV and safe and affordable vaccine candidates are needed to alleviate …
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Molecular studies on beak and feather disease virus
Includes bibliographical references.
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Feather weights : rapid redeployable structures for interim use
This thesis examines vacant urban parcels that are either unviable for development or stalled as a result of the economic crisis, and asks: How is it possible to generate both economic and urban value on these sites until they are ready to be developed? Reluctant to invest in these areas developers …
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Experimental Characterization of Additively Manufactured Multi-Feather Wingtip Devices
… to traditional manufacturing methods. Three “featherlet” wing tip attachments were designed and manufactured. Surface flow visualization and force balance campaigns were then conducted at the ERAU Micaplex low speed wind tunnel. The surface streamlines from the oil surface flow visualization …
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Disease in Spheniscus penguins: Feather-loss disorder and Avian Pox
Avian pox and a previously undiscovered feather-loss disorder affect Spheniscus penguins. Avian pox is an enveloped doublestranded DNA virus that is mechanically transmitted via arthropod vectors or mucosal membrane contact with infectious particles or birds. Avian pox outbreaks primarily affected …
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Mercury's Effects on Feather Color and Fitness of Eastern Bluebirds
… fitness measures were recorded. Four different feather types were also taken to measure mercury's effects on structural coloration. This is the first study to show that mercury in feathers may impact plumage coloration through three possible mechanisms: (1) binding to the sulfide bonds in …
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Biodegradation of poultry feathers using a keratinolytic enzyme to produce feather meal
Submitted in fulfilment of the requirements for the degree of Master of Applied Science in Biotechnology, Durban University of Technology, 2022.
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Flight feather moult patterns and stable isotope analysis in the Woodland Kingfisher
… and non-breeding grounds, the renewal of feathers and reproduction. All the mentioned processes are energetically expensive and they need special physiological adaptations. I investigated the timing of moult by actively catching Woodland Kingfishers in the field and scoring them for moult. …
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Birds of a white feather : a congenital hypopigmentary disorder in the chick
… are melanocytes present in the skin regions and feather follicles in normal numbers of 8- to 13-day white chick embryos? If melanocytes are present in normal numbers, are they unable to synthesise pigment because of a defect in melanocyte differentiation? Two approaches were used to answer the …
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Correlating feather structure, wettability, and robustness with ecological behavior of aquatic birds
… birds can interact with water without their feathers being easily wetted; some species dive tens of meters and emerge to spread their wings to dry. In past studies attempting to connect such ecological behavior and feather structure, the typical approach of microscopy has demonstrated the …
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Anting Behavior in Birds: Ant Selection and Effect of ant Chemistry on Feather Ectoparasites
… occurs when songbirds apply ants to their feathers. During anting displays, a bird draws its wings forward in front of the head and swings its tail around to the far right or left. Both wing and tail feathers are then rubbed with ants held in the bird's beak. The potential associations …
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From Micro to Macro: Investigating mechanisms involved in the convergent evolution of feather lice ecomorphs
… and macroevolutionary perspective. Parasitic feather lice in the family Philopteridae (Order: Psocodea) are found on almost all species of birds and have repeatedly diversified into ecomorphs specific to areas of their host's body. These morphological characteristics allow them to avoid being …
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Birds of a feather flock together race versus gender preference in the South African workplace
Social Identity Theory proposes that individuals derive part of their identity and their social identity, through their membership in social groups. In order to derive a positive social identity, they attempt to compare themselves more favourably in comparison to members of groups they do not …
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Words of a Feather Flock Together. The Role of Morphology in Human Auditory Word Recognition Models
Contains fulltext : 329448.pdf (Publisher’s version ) (Open Access)
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Development of a potential challenge model and plant-produced vaccine candidate for beak and feather disease virus
Psittacine beak and feather disease (PBFD), the most prevalent viral disease affecting psittacines, is caused by beak and feather disease virus (BFDV). An outbreak of the disease has been reported in wild endangered Cape parrots (Poicephalus robustus), which is endemic to South Africa. No treatment …
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The effect of heat and moisture on the small angle x-ray diffraction diagram of feather keratin
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Biology, 1949.
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