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feathers, etc ; death domain receptors; immunomodulation; programmed cell death; virulence; virus replication; viruses; Show all 7 Subjects
Abstract:
... Vaccines against Marek’s disease can protect chickens against clinical disease; however, infected chickens continue to propagate the Marek’s disease virus (MDV) in feather follicles and can shed the virus into the environment. Therefore, the present study investigated if MDV could induce an immunoregulatory microenvironment in feathers of chickens and whether vaccines can overcome the immune evasi ...
... The claims of an array of specimens to be considered part of the type series of Pitta gurneyi are clarified. The plate of P. gurneyi that is commonly linked to the type description in Stray Feathers was based on two specimens Hume gave to Gurney and was published considerably after the type description itself. ...
down (feathers), etc ; fabrics; friction; heat; keratin; research; vibration; zero gravity; Show all 8 Subjects
Abstract:
... Duck down, as a natural keratin material, has been widely used as a filling material. The multilevel bifurcation structure of down has been observed and characterized through scanning electron microscopy. The structure is a complex fractal structure composed of four-level self-similar structures including five units, that is, the calamus, main barb, barb, barbule, and node or prong. The differenti ...
... The present study was undertaken to quantify the Marek’s Disease Virus (MDV) serotypes in vaccinated commercial layer flocks at 7, 14, 21, 28, 35 and 60-90 days post vaccination (dpv) and to correlate the pathogenic Gallid herpesvirus 2 (GaHV-2, MDV1) load with vaccine viral load of Gallid herpesvirus 3 (GaHV-3, MDV2) and Meleagridis herpesvirus 1 (MeHV-1, MDV3). A total of 25 commercial layer flo ...
down (feathers), etc ; Acarus siro; Dermatophagoides pteronyssinus; Lepidoglyphus destructor; acarology; dominant species; dust; Show all 7 Subjects
Abstract:
... This study was conducted to compare the goose down and the woolen pillows in terms of number of house dust mites per gram of dust. The study was conducted in Kars province, Turkey in September 2020. A total of 180 house dust samples were collected from 45 randomly selected houses in various districts of the city. The number of houses in which at least one sample was positive regarding mites was fo ...
feathers, etc ; Influenza A virus; Mycoplasma; antibodies; cloaca; conjunctivitis; influenza; mixed infection; morbidity; rhinitis; sialidase; viruses; Show all 12 Subjects
Abstract:
... Infection dynamics data for influenza A virus in a species is important for understanding host-pathogen interactions and developing effective control strategies. Seven-week-old ostriches challenged with H7N1 low pathogenic viruses (LPAIV) or clade 2.3.4.4B H5N8 high pathogenic viruses (HPAIV) were co- housed with non-challenged contacts. Clinical signs, virus shed in the trachea, cloaca, and feath ...
feathers, etc ; biomarkers; blood serum; corticosterone; magnetism; metabolites; metabolome; metabolomics; nuclear magnetic resonance spectroscopy; poultry health; ultrafiltration; Show all 11 Subjects
Abstract:
... Noninvasive biomarkers of stress that are predictive of poultry health are needed. Feather pulp is highly vascularized and represents a potential source of biomarkers that has not been extensively explored. We investigated the feasibility and use of feather pulp for novel biomarker discovery using ¹H-Nuclear Magnetic Resonance Spectroscopy (NMR)-based metabolomics. To this end, high quality NMR me ...
feathers, etc ; Loxia curvirostra; birds; breeding; models; molting; summer; Show all 7 Subjects
Abstract:
... Suspended moult is a relatively common phenomenon in birds, but it has remained relatively ignored for a long time in studies dealing with moulting process. Furthermore, the new and increasing number of models used to estimate moult duration systematically omit the fact that suspended moults can occur and that they significantly alter parameter estimates. Taking suspended moults into account is cr ...
feathers, etc ; Colaptes auratus; alleles; beta-cryptoxanthin; birds; color; hybridization; hybrids; hydroxylation; loci; oxidation; phenotype; pigmentation; pigments; North America; Show all 15 Subjects
Abstract:
... Hybridization can bring in single individuals alleles that were never designed to work together, which can result in unexpected or transgressive phenotypes. The Yellow-shafted (auratus group) and Red-shafted (cafer group) subspecies groups of the Northern Flicker (Colaptes auratus) differ conspicuously in the coloration of their flight feathers, but hybridize freely where their ranges overlap in w ...
feathers, etc ; Bucerotidae; Passeriformes; females; molting; nests; ostriches; progeny; spring; Show all 9 Subjects
Abstract:
... Double-brooding is an avian breeding strategy where birds produce at least two successful nests in a single season. Double-brooding is seen most frequently in small passerines for which the breeding season is lengthy enough that they can easily fit in multiple nesting attempts. Such a pattern of breeding is therefore less common among large birds with long incubation periods and slow offspring dev ...
feathers, etc ; courtship; ears; hearing; males; peafowl; phylogeny; pigeons; tail; Show all 9 Subjects
Abstract:
... Despite the excitement that followed the report of infrasound sensitivity in pigeons 40 years ago, there has been limited followup, with only eleven species of birds having auditory thresholds at frequencies below 250 Hz. With such sparse data on low-frequency hearing, there is little understanding of why some birds hear very low frequencies while others do not. To begin to expand the phylogenetic ...
... Increased poultry production worldwide has led to higher generation of poultry waste materials. To date, these materials have limited uses and often end up in landfill. Research has begun to investigate new applications for these waste materials, particularly as fillers and functional additives with a range of polymers. With oil supplies diminishing, use of an otherwise waste material to mitigate ...
... This paper reveals the complexes of structural signs of body feathers in Charadriiformes bird species that have a taxonomical value. The complexes of structural signs are united in a system of diagnostic signs, which is used to identify bird taxa by one body feather, a part of a feather, and/or feather fragments. It is noted that the successful definition of a taxon requires the use of signs withi ...
down (feathers), etc ; chicks; dietary protein; equations; females; genotype; males; molting; nylon; Show all 9 Subjects
Abstract:
... 1. Changes in feather length and weight and daily losses of down, contour feathers, remiges and retrices were studied in two commercial broiler strains to determine feather growth and moult in broilers up to 112 d of age. 2. Ten pens of 20 chicks for each sex x strain were fed adequate amounts of dietary protein in a four-phase feeding programme. Ten birds were sampled per genotype at 14, 28, 42, ...
feathers, etc ; Hirundo rustica; aerodynamic properties; aerodynamics; data collection; females; sexual selection; Show all 7 Subjects
Abstract:
... Long tail feathers of the barn swallow Hirundo rustica are a classic example of an intersexually selected trait, but previous aerodynamic analyses indicate that the tail feather is only 10–12 mm longer than the aerodynamic optimum even in the nominate subspecies with long tails. Here, by experimentally shortening female tail length, we studied the feeding cost of long tail feathers in Japanese bar ...
feathers, etc ; adults; body size; juveniles; life history; migratory behavior; molting; Saskatchewan; Show all 8 Subjects
Abstract:
... Using the patterns of fault bars in their primaries, we studied the mode of primary replacement in non-molting Lesser Sandhill Cranes (Antigone c. canadensis) salvaged from hunters in southwestern Saskatchewan. About 80% of their primaries are used for 2 yr and 20% for 3 yr. Primaries are replaced during the breeding season and are lost in synchronous blocks representing about half the primaries, ...
feathers, etc ; Morus capensis; adults; asymmetry; models; molting; ostriches; seabirds; tail; Southern Africa; Show all 10 Subjects
Abstract:
... Little has been reported on moult in sulids, including gannets. The Cape Gannet Morus capensis is an endangered seabird endemic to southern Africa. We describe the timing, duration, symmetry and sequence of flight feather moult in Cape Gannets from two breeding colonies and assess whether moult can be used as an index of condition. Using the Underhill-Zucchini model, we estimate moult parameters b ...
feathers, etc ; chickens; disulfides; green chemistry; keratin; laundry; oxidation; protein structure; wastes; wet strength; Show all 10 Subjects
Abstract:
... Tough keratin fibers from chicken feathers have been produced continuously via controlled assembly of secondary protein structures. Though research on utilization of keratinous wastes began decades ago, very few regenerated products with high quality were developed due to damage to the primary structures during extraction and poor recovery of the secondary structures in the regenerated materials. ...
feathers, etc ; Diptera; beak; flight; image analysis; mechanical models; pigeons; preening; robots; vanes; wings; Show all 11 Subjects
Abstract:
... Data is presented to explain why birds can recover their ruffled feather vanes by shaking wings and preening feathers with the beak [1]. Presented data includes the SEM microscopic images of rachis, barbs and barbules of pigeon's feather and the images recording the experiments of observing and mimicking the recovering performance of pigeons. Besides, based on the measurement and observation of th ...
down (feathers), etc ; DNA; adulterated products; autoclaving; beef; cattle; chickens; ducks; equipment; fluorescence; food safety; fraud; human resources; mitochondria; pork; quantitative polymerase chain reaction; swine; Europe; Show all 18 Subjects
Abstract:
... Since the "Horsemeat Scandal" in Europe has aroused people's attention to adulteration of meat, real-time PCR method was used as gold standard to detect single animal species. However, real-time PCR requires expensive equipment, professional personnel, and fluorescent probes with specific modifications in addition to primers, which limit the practical application of this technology for multiple fr ...