Periodic casting off FEATHERS; HAIR; or cuticle. Molting is a process of sloughing or desquamation, especially the shedding of an outer covering and the development of a new one. This phenomenon permits growth in ARTHROPODS, skin renewal in AMPHIBIANS and REPTILES, and the shedding of winter coats in BIRDS and MAMMALS.
In some animals, the jaws together with their horny covering. The beak usually refers to the bill of birds in which the whole varies greatly in form according of the food and habits of the bird. While the beak refers most commonly to birds, the anatomical counterpart is found also in the turtle, squid, and octopus. (From Webster, 3d ed & Storer, et al., General Zoology, 6th ed, p491, 755)
Analog or digital communications device in which the user has a wireless connection from a telephone to a nearby transmitter. It is termed cellular because the service area is divided into multiple "cells." As the user moves from one cell area to another, the call is transferred to the local transmitter.
Embryonal feather growth in the chicken. (1/576)Prenatal feather growth development in the chicken was studied in 7 body regions in HH stages 27-45, using direct measurements, specific histological and immunohistochemical methods, and scanning electron microscopy. The results from measurements of absolute length values, and, particularly, growth rate development in each HH stage revealed a distinct phase of most intensive growth in HH stage 40-41, which was preceded by feather follicle insertion and accompanied by the occurrence of alpha-keratins in barbule cells. Specific regional evaluation demonstrated that growth in the feather follicles of abdominal skin generally showed the slowest progression from absolute values and that in the feather filaments of the developing wings the most rapid progression occurred during HH stage 40-41 from growth rate values. (+info)
Role of Pitx1 upstream of Tbx4 in specification of hindlimb identity. (2/576)In spite of recent breakthroughs in understanding limb patterning, the genetic factors determining the differences between the forelimb and the hindlimb have not been understood. The genes Pitx1 and Tbx4 encode transcription factors that are expressed throughout the developing hindlimb but not forelimb buds. Misexpression of Pitx1 in the chick wing bud induced distal expression of Tbx4, as well as HoxC10 and HoxC11, which are normally restricted to hindlimb expression domains. Wing buds in which Pitx1 was misexpressed developed into limbs with some morphological characteristics of hindlimbs: the flexure was altered to that normally observed in legs, the digits were more toe-like in their relative size and shape, and the muscle pattern was transformed to that of a leg. (+info)
Wnt-7a in feather morphogenesis: involvement of anterior-posterior asymmetry and proximal-distal elongation demonstrated with an in vitro reconstitution model. (3/576)How do vertebrate epithelial appendages form from the flat epithelia? Following the formation of feather placodes, the previously radially symmetrical primordia become anterior-posterior (A-P) asymmetrical and develop a proximo-distal (P-D) axis. Analysis of the molecular heterogeneity revealed a surprising parallel of molecular profiles in the A-P feather buds and the ventral-dorsal (V-D) Drosophila appendage imaginal discs. The functional significance was tested with an in vitro feather reconstitution model. Wnt-7a expression initiated all over the feather tract epithelium, intensifying as it became restricted first to the primordia domain, then to an accentuated ring pattern within the primordia border, and finally to the posterior bud. In contrast, sonic hedgehog expression was induced later as a dot within the primordia. RCAS was used to overexpress Wnt-7a in reconstituted feather explants derived from stage 29 dorsal skin to further test its function in feather formation. Control skin formed normal elongated, slender buds with A-P orientation, but Wnt-7a overexpression led to plateau-like skin appendages lacking an A-P axis. Feathers in the Wnt-7a overexpressing skin also had inhibited elongation of the P-D axes. This was not due to a lack of cell proliferation, which actually was increased although randomly distributed. While morphogenesis was perturbed, differentiation proceeded as indicated by the formation of barb ridges. Wnt-7a buds have reduced expression of anterior (Tenascin) bud markers. Middle (Notch-1) and posterior bud markers including Delta-1 and Serrate-1 were diffusely expressed. The results showed that ectopic Wnt-7a expression enhanced properties characteristic of the middle and posterior feather buds and suggest that P-D elongation of vertebrate skin appendages requires balanced interactions between the anterior and posterior buds. (+info)
Purification and characterization of a keratinolytic serine proteinase from Streptomyces albidoflavus. (4/576)Streptomyces strain K1-02, which was identified as a strain of Streptomyces albidoflavus, secreted at least six extracellular proteases when it was cultured on feather meal-based medium. The major keratinolytic serine proteinase was purified to homogeneity by a two-step procedure. This enzyme had a molecular weight of 18,000 and was optimally active at pH values ranging from 6 to 9.5 and at temperatures ranging from 40 to 70 degrees C. Its sensitivity to protease inhibitors, its specificity on synthetic substrates, and its remarkably high level of NH2-terminal sequence homology with Streptomyces griseus protease B (SGPB) showed that the new enzyme, designated SAKase, was homologous to SGPB. We tested the activity of SAKase with soluble and fibrous substrates (elastin, keratin, and type I collagen) and found that it was very specific for keratinous substrates compared to SGPB and proteinase K. (+info)
Influence of drinking water and diet on the stable-hydrogen isotope ratios of animal tissues. (5/576)Despite considerable interest in using stable-hydrogen isotope ratio (deltaD) measurements in ecological research, it was previously unknown whether hydrogen derived from drinking water, in addition to that derived from diet, contributed to the nonexchangeable hydrogen in animal tissues. We raised four experimental groups of quail (Coturnix coturnix japonica) from hatch on two isotopically distinct diets (mean nonexchangeable deltaD: -146 and -60 per thousand, Vienna Standard Mean Ocean Water Standard) and drinking waters (mean deltaD: -130 and +196 per thousand, Vienna Standard Mean Ocean Water Standard). Here we show that both dietary and drinking water hydrogen are incorporated into nonexchangeable hydrogen in both metabolically active (i.e., muscle, liver, blood, fat) and inactive (i.e., feather, nail) tissues. Approximately 20% of hydrogen in metabolically active quail tissues and 26-32% of feathers and nail was derived from drinking water. Our findings suggest environmental interpretations of deltaD values from modern and fossil animal tissues may need to account for potentially large isotopic differences between drinking water and food and require a good understanding of the physiological ecology of study organisms. (+info)
Carotenoids, sexual signals and immune function in barn swallows from Chernobyl. (6/576)Carotenoids have been hypothesized to facilitate immune function and act as free-radical scavengers, thereby minimizing the frequency of mutations. Populations of animals exposed to higher levels of free radicals are thus expected to demonstrate reduced sexual coloration if use of carotenoids for free-radical scavenging is traded against use for sexual signals. The intensity of carotenoid-based sexual coloration was compared among three populations of barn swallows Hirundo rustica differing in exposure to radioactive contamination. Lymphocyte and immunoglobulin concentrations were depressed, whereas the heterophil:lymphocyte ratio, an index of stress, was enhanced in Chernobyl swallows compared to controls. Spleen size was reduced in Chernobyl compared to that of two control populations. Sexual coloration varied significantly among populations, with the size of a secondary sexual character (the length of the outermost tail feathers) being positively related to coloration in the two control populations, but not in the Chernobyl population. Thus the positive covariation between coloration and sexual signalling disappeared in the population subject to intense radioactive contamination. These findings suggest that the reliable signalling function of secondary sexual characters breaks down under extreme environmental conditions, no longer providing reliable information about the health status of males. (+info)
beta-catenin signaling can initiate feather bud development. (7/576)Intercellular signaling by a subset of Wnts is mediated by stabilization of cytoplasmic beta-catenin and its translocation to the nucleus. Immunolocalization of beta-catenin in developing chick skin reveals that this signaling pathway is active in a dynamic pattern from the earliest stages of feather bud development. Forced activation of this pathway by expression of a stabilized beta-catenin in the ectoderm results in the ectopic formation of feather buds. This construct is sufficient to induce bud formation since it does so both within presumptive feather tracts and in normally featherless regions where tract-specific signals are absent. It is also insensitive to the lateral inhibition that mediates the normal spacing of buds and can induce ectopic buds in interfollicular skin. However, additional patterning signals cooperate with this pathway to regulate gene expression within domains of stabilized beta-catenin expression. Localized activation of this pathway within the bud as it develops is required for normal morphogenesis and ectopic activation of the pathway leads to abnormally oriented buds and growths on the feather filaments. These results suggest that activation of the beta-catenin pathway initiates follicle development in embryonic skin and plays important roles in the subsequent morphogenesis of the bud. (+info)
The role of long range, local and direct signalling molecules during chick feather bud development involving the BMPs, follistatin and the Eph receptor tyrosine kinase Eph-A4. (8/576)The development of the feather buds during avian embryogenesis is a classic example of a spacing pattern. The regular arrangement of feather buds is achieved by a process of lateral inhibition whereby one developing feather bud prevents the formation of similar buds in the immediate vicinity. Lateral inhibition during feather formation implicates a role of long range signalling during this process. Recent work has shown that BMPs are able to enforce lateral inhibition during feather bud formation. However these results do not explain how the feather bud escapes the inhibition itself. We show that this could be achieved by the expression of the BMP antagonist, Follistatin. Furthermore we show that local application of Follistatin leads to the development of ectopic feather buds. We suggest that Follistatin locally antagonises the action of the BMPs and so permits the cellular changes associated with feather placode formation. We also provide evidence for the role of short range signalling during feather formation. We have correlated changes in cellular morphology in feather placodes with the expression of the gene Eph-A4 which encodes a receptor tyrosine kinase that requires direct cell-cell contact for activation. We show that the expression of this gene precedes cellular reorganisation required for feather bud formation. (+info)
Feather morphogenesis and feather pattern in normal and talpid3 mutant chick embryos | Development
A comparative study of feather morphogenesis and the development of feather pattern in normal and talpid3 embryos has been carried out.. The development of talpid3 CAM grafts shows that the effect of the gene is autonomous in the skin.. The most striking effect of the gene upon feather morphogenesis is the failure of normal feather germ condensations to appear within the dermis. This is reflected in the abnormal distribution of alkaline phosphatase through the dermis.. Dermal cells within and between condensations are not orientated in the mutant as they are in normal embryos, probably owing to the same defect in cell behaviour which causes condensation failure in talpid3 precartilage mesenchyme.. The role of dermal cell orientation and movement in generating the overall feather pattern is examined in both normal and talpid3 embryos.. ...
Properties and optimal manufacturing conditions of chicken feathers thermoplastics biocomposites
The aim of this study was the analysis and characterization of composites based on thermoplastics (ethylene vinyl acetate, polypropilene and high-density polyethylene) and chicken feathers. Several composite samples with a content of 20% v/v of chicken feathers have been studied to determine the optimal manufacturing conditions of temperature, mixing time, and mixing speed to achieve the best tensile properties. The results have shown that the addition of micronized chicken feather (20% v/v) to thermoplastic matrices increases stiffness and provides a more brittle behavior. Ethylene vinyl acetate matrix also shows an ability to participate in second-order intermolecular interactions with chicken feathers, providing better tensile properties (tensile strength and toughness) than polypropilene and high-density polyethylene. Optimal manufacturing conditions were found for a mixing time of around 5min; a mixing speed of 50rmin 1 ; and temperature values of 160 C in case of high-density polyethylene, ...
Canonical and non-canonical Wnt signaling in the patterning of multipotent stem cells during feather development :: University...
The formation of complex ectodermal organs begins with multipotent stem cells that undergo many basic cellular events. During the formation of a complex organ, there are many factors that need to be considered such as patterning, size, and shape in order to maintain proper organ function. Feather development is a good model. The feather field must be patterned to establish how many feathers, the size must be determined, and the shape of the feather must be appropriate for its function. Canonical and non-canonical Wnt signaling has been implicated in many crucial steps in feather bud development.; Canonical Wnt signaling involves the stabilization and accumulation of beta-catenin, which is subsequently translocated to the nucleus. There, beta-catenin interacts with various coactivators including CREB-binding protein (CBP) and p300, which results in the expression of different genes downstream of beta-catenin/TCF that may direct cells towards a path of pluripotency or differentiation. One of the ...
Fresh Fossil Feather Nanostructures | The Institute for Creation Research
Bird feathers can contain pigmentation for a wide range of colors, with specific molecules reflecting certain hues when light touches them. They also can display structural colors, where the thicknesses of layers of cells and connective tissues are fine-tuned to refract certain colors.. Scientists recently described structural coloration that is still clearly discernible in well-preserved fossil feathers. Why do these fossil feathers have their original cell structures laid out in the original patterns if they are millions of years old?. In 1995, paleontologists Derek Briggs and Paul Davis provided an overview of fossil feathers from the 40 or so places on the globe where they were known to exist.1 Among their findings was that 69 percent of feather fossils are preserved not as impressions, but as carbon traces. This was verified by comparing the proportions of carbon in both the surrounding carbonaceous rock and the fossil within it, to the proportions of organically-derived carbon from the ...
Degradation and regeneration of feather keratin in NMMO solution<...
TY - JOUR. T1 - Degradation and regeneration of feather keratin in NMMO solution. AU - Ma, Bomou. AU - Sun, Qisong. AU - Yang, Jing. AU - Wizi, Jakpa. AU - Hou, Xiuliang. AU - Yang, Yiqi. PY - 2017/7/1. Y1 - 2017/7/1. N2 - Chicken feather, a potential source of keratin, is often disposed as waste material. Although some methods, i.e., hydrolysis, reduction, and oxidation, have been developed to isolate keratin for composites, it has been limited due to the rising environmental concerns. In this work, a green solvent N-methylmorpholine N-oxide (NMMO) was used to extract keratin from chicken feather waste. Eighty-nine percent of keratin was extracted using 75% NMMO solution. However, the result from size exclusion HPLC showed that most of the keratin degraded into polypeptide with molecular weight of 2189 and only 25.3% regenerated keratin was obtained with molecular weight of 14,485. Analysis of amino acid composition showed a severe damage to the disulfide bonds in keratin during the extraction ...
Did Dinosaurs Come with or without Feathers? | The Institute for Creation Research
Assuming hypothetical feathers on dinosaurs functioned as modern feathers do, they must consist of all the required working parts. Even the angle, thickness, shape, and construction of the parts must all exist and be assembled within narrow tolerances.5 So far, Darwinists have only impressions of protofeathers that they assume were structures on the way to becoming modern feathers. But until they became functional feathers, it appears they would have decreased a creatures fitness, making them less likely to persist in future generations.6. Consequently, a biblical creation worldview rejects the supposition that protofeathers were structures on the way to evolving into flight feathers. So, what were they? Possibly skin collagen fibers, not feathers. Some resemble fossil preparation marks, which are caused by tools used to uncover and excavate fossils. For these reasons, many researchers are skeptical of inferring feathers when there are no feathers preserved with bona fide dinosaurs in the ...
UCD News - Dinosaur feather colours and markings identified for first time#
Our research provides extraordinary insights into the origin of feathers. In particular, it helps to resolve a long-standing debate about the original function of feathers - whether they were used for flight, insulation, or display, says Professor Mike Benton, Professor of Palaeontology at the University of Bristol. We now know that feathers came before wings, so feathers did not originate as flight structures.. We therefore suggest that feathers first arose as agents for colour display and only later in their evolutionary history did they become useful for flight and insulation.. According to Dr Paddy Orr, UCD School of Geological Sciences, University College Dublin, one of the scientists involved in the research, melanosomes are colour-bearing organelles buried within the structure of feathers and hair in modern birds and mammals, giving black, grey, and rufous tones such as orange and brown. Because melanosomes are an integral part of the tough protein structure of the feather, they ...
Shifting topology of stem cells and molecular expression during feather regenerative cycling :: University of Southern...
Feather is known for its robust regenerative ability. Stem cells in the feather have recently been mapped. However different parts of the chicken body have different size feathers. How stem cells are managed differently in these different feathers has not been elucidated. Here we analyze the growth pattern of feathers from neck and saddle feather. We analyze the topological arrangement of stem cell, TA cell, differentiated cell during different regenerative feather cycling. We found the stem cell is in a ring configuration during growth phase but shifted down to smaller ring or to assume a Ushape flanking the dermal papilla. The number of stem cells remains rather constant during stem cell cycling but also changes around three folds. On the contrast the number of TA cells change up to twenty thirty fold differences. There also appear to have higher stem cell number and a larger dermal papilla in the saddle compared to the neck feather. We found N-CAM and Tenascin-C expressed in the niche next to ...
FEATHERS: A MARVEL OF DESIGN
Feathers are little too perfect, that is the problem. Feathers give no indication that they ever needed improvement. In fact, the earliest known fossil feather is so modern-looking as to be indistinguishable from the feathers birds flying today. The fossil feather is from archaeopteryx, an extinct creature sometimes presented as a missing link in the line of descent to modern birds. Most paleontologists, however, no longer consider it an ancestor of modern birds. Yet, evolutionary theory teaches that feathers must be the result of gradual, cumulative change in earlier skin outgrowths. Moreover, feathers could not have evolved without some plausible adaptive value in all of the intermediate steps ...
A second life for chicken feathers - Story - Fonds Nature et technologies
Knowing that chicken feathers are 98% keratin-a water-insoluble protein-and that proteins are a key element for creating absorbent materials, the researcher and two of her students decided to use feather byproduct to synthesize bio-based superabsorbent hydrogels. To that end, they modified the structure of the keratin to absorb certain liquids, such as motor oil and diesel. The result: in the laboratory, their keratin-based hydrogels presented a greater oil holding capacity than polypropylenes derived from petrochemicals. Dumont and her team are now working on enhancing the performance of these hydrogels for wide-scale use. Possible uses include agriculture water conservation and fixing heavy metals found in soil or in watercourses.. Professor Dumont used the same approach to valorize another by-product: zein, obtained during the production of vegetable oil. The structure of this protein was modified by hydrolysis to adsorb copper, a heavy metal found in the food chain. Early trials show that ...
Natural Selections: 2011
The brilliant red, orange and yellow colours of parrot feathers are the product of psittacofulvins, which are synthetic pigments known only from parrots. Recent evidence suggests that some pigments in bird feathers function not just as colour generators, but also preserve plumage integrity by increasing the resistance of feather keratin to bacterial degradation. We exposed a variety of colourful parrot feathers to feather-degrading Bacillus licheniformis and found that feathers with red psittacofulvins degraded at about the same rate as those with melanin and more slowly than white feathers, which lack pigments. Blue feathers, in which colour is based on the microstructural arrangement of keratin, air and melanin granules, and green feathers, which combine structural blue with yellow psittacofulvins, degraded at a rate similar to that of red and black feathers. These differences in resistance to bacterial degradation of differently coloured feathers suggest that colour patterns within the ...
Faster Circuit Board Built With Chicken Feathers | TreeHugger
In a recent exhibit in London, a circuit board made from soybeans and chicken feathers drew a great deal of attention. The board was developed by Mingjiang Zhan and Richard Wool in collaboration with Intel. A micrograph of feathers (seen here) shows
Structural coloration in a fossil feather | Biology Letters
SEM investigation of representative isolated feathers from Messel showed that the keratin has degraded, exposing the melanosomes, which display two main types of organization. Most feathers revealed elongate oblate eumelanosomes roughly aligned along barbs and barbules, with little variation in their morphology or arrangement over the surface of the feather (as in the Crato example illustrated by Vinther et al. 2008). Three contour feathers, on the other hand, showed a striking contrast in the arrangement of melanosomes in the proximal and distal regions of the feather. These specimens range up to 3 cm in length. In the best-preserved specimen (SMF ME 3850, figure 1a), the basal 20 mm of the vane displays a closed pennaceous structure with interlocking barbules. The distal 8 mm of the vane has a conspicuously open pennaceous structure with prominent barbules that do not overlap or interlock. The barbules, which are 10-15 µm wide and oriented to the barb ramus at approximately 30°, are ...
The Post-Modern Synthesis: Counters to Conservapedia (Part 8): Feathers
Second, we have discovered a lot about the evolution of feathers which Carl Zimmer outlines in an article for National Geographic (read it here). Bird feathers are marvels of the biological world which have perplexed many scientists. Shortly after Darwin published On the Origin of Species, paleontologists unearthed archaeopteryx with a mixture of avian and reptilian traits. Most importantly, this bird/reptile had feathers. Later on, scientists discovered more similarities between our modern birds and the extinct dinosaurs. Theropod dinosaurs (T. rex and Velociraptors) shared many anatomical and behavioral similarities with birds, but most importantly they had feathers even though they were far to big to fly. It seems the fight evolved from reptiles with feathers, rather than feathers evolving in flying reptiles. ...
Improved keratinase production for feather degradation by Bacillus licheniformis ZJUEL31410 in submerged cultivation |...
Optimal medium was used to improve the production of keratinase by Bacillus licheniformis ZJUEL31410, which has a promising application in the transformation of feather into soluble protein. The results of single factor design revealed that the concentration of feather at 20 g/l and the initial pH at value 8 was the best for the production of keratinase and the degradation of feather. Ammonia salt and nitrate salt strongly restricted the production of keratinase and the degradation of feather. Result of Box-Behnken design (BBD) experiment which was used to optimize concentrations of glucose, corn steep flour and K2HPO4 for further improvement of keratinase productivity showed that the optimal medium was composed of glucose (20 g/l), corn steep flour (7.5 g/l), K2HPO4 (1 g/l) and feather (20 g/l). The result of submerged batch cultivation of B. licheniformis ZJUEL31410 in the 5 L fermentor indicated that the optimal medium had the highest keratinase and the degree of feather degradation (DFD) at ...
Plumage - Wikipedia
Plumage (Latin: plūma feather) refers both to the layer of feathers that cover a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies, and may vary with age classes. Within species there can be different colour morphs. The placement of feathers on a bird are not haphazzard, but rather emerge in organized, overlapping rows and groups, and these feather tracts are known by standardized names. Most birds moult, usually before and after breeding, resulting in a breeding or nuptial plumage and a basic plumage. Many ducks and some other species such as the red junglefowl have males wearing a bright nuptial plumage while breeding and a drab eclipse plumage for some months afterwards. The painted buntings juveniles have two inserted moults in their first autumn, each yielding plumage like an adult females. The first starts a few days after fledging replacing the juvenile plumage with an auxiliary formative plumage; ...
Color expression in experimentally regrown feathers of an overwintering migratory bird: implications for signaling and seasonal...
We predicted that habitat quality, T, and energetic condition would be positively related to the quality of colorful feathers. In studies focused on the breeding season, these factors have been known to influence feather color (e.g., Hill and Montgomerie 1994; Blâs et al. 2007; Ferns and Hinsley 2008; Lindsay et al. 2011; Barron et al. 2013). Here, however, we experimentally induced colorful plumage production in a wintering migratory bird and failed to find support for these predictors. Furthermore, we found that the quality of colorful feathers is diminished when replaced on the wintering grounds, particularly for mature males. Our findings suggest that 1) condition-mediated mechanisms for plumage quality may not be operating in winter and 2) there is a significant cost to plumage quality when feathers are lost in winter. Furthermore, we suggest that plumage maturation in young males may be accelerated by events that induce feather replacement.. Both ASY and SY males exhibited reductions in ...
Detecting Avian Influenza Virus (H5N1) in Domestic Duck Feathers - Volume 14, Number 10-October 2008 - Emerging Infectious...
One-step RT-PCR was performed on the total RNA extracted from the same samples as in virus isolation to detect the H5 AI virus gene (SuperScript One-Step RT-PCR System; Invitrogen, Carlsbad, CA, USA). The 1:10 dilution of RNA templates was used for feathers. The primers used were H5-248-270F and H5-671-647R; the expected product was 424 bp (7). The sensitivity of RT-PCR was slightly higher than that of virus isolation except for the results with cloacal swabs (Table).. Immunohistochemical testing was performed to detect influenza virus nucleoprotein in the feather tissue by using a rabbit polyclonal antibody (ab22285; Abcam Ltd., Cambridge, UK). Virus antigens were detected in feather epidermal cells from days 3 through 6 pi, and in a few stromal cells in the feather pulp on days 3 and 4 pi (Appendix Figure, panel C).. Our results indicate that larger amounts of viruses can be isolated for a longer time from feathers than from swabs. Therefore, feathers can be considered useful samples for ...
Iridescent structural colour production in male blue-black grassquit feather barbules: the role of keratin and melanin |...
Male blue-black grassquit feather barbules present a single keratin layer over a layer comprising melanin granules. This simple arrangement is sufficient to produce iridescent coloration, as confirmed by thin-film optical modelling. Shifts in hue and shape of the reflected spectrum derived from changing angles of light incidence were well explained by the modelled differences in the optical path that light encounters at each angle. This result reinforces the conclusion that these barbules are photonic structures that interact with light as predicted by the thin-film models of refraction.. Thin-film optical modelling also revealed that light can only penetrate the melanin layer and interact with the keratin core when the melanin layer is sufficiently thin (fewer than two melanin granules, on average). Although this configuration can be found in some male grassquit feathers, most individuals have melanin layers of two to three granules, with little variation across average values. This suggests ...
Poultry Feathers Made Into Plastic Mulch : USDA ARS
February 24, 2005. Agricultural Research Service (ARS) scientists who have developed a method to turn chicken feathers into plastic products are continuing to bring the technology closer to the marketplace. ARS chemist Walter Schmidt developed the technology to clean feathers and separate them into chopped fibers and quill pieces. Now Schmidt and fellow ARS chemist Justin Barone have developed and applied for a patent for a process to convert cleaned and chopped feather material into plastic products on a laboratory scale. Schmidt and Barone work in ARS Environmental Quality Laboratory in Beltsville, Md. According to Barone, the material is made on traditional plastics processing equipment using chopped chicken feathers and other easily obtainable, naturally derived materials. The feather-derived plastic can be molded just like any other plastic and has properties very similar to commodity plastics such as polyethylene and polypropylene. This makes the feather-derived plastic a unique material ...
Use of wheat straw and chicken feather hydrolysates as a complete medium for lactic acid production | Czech Journal of Food...
Use of wheat straw and chicken feather hydrolysates as a complete medium for lactic acid production | Lucia Gharwalová, Leona Paulová, Petra Patakova, Barbora Branská, Karel Melzoch | Agricultural Journals
The Extent of the Preserved Feathers on the Four-Winged Dinosaur Microraptor gui under Ultraviolet Light
Background The holotype of the theropod non-avian dinosaur Microraptor gui from the Early Cretaceous of China shows extensive preservation of feathers in a halo around the body and with flight feathers associated with both the fore and hindlimbs. It has been questioned as to whether or not the feathers did extend into the halo to reach the body, or had disassociated and moved before preservation. This taxon has important implications for the origin of flight in birds and the possibility of a four-winged gliding phase. Methodology/Principal Findings Examination of the specimen under ultraviolet light reveals that these feathers actually reach the body of the animal and were not disassociated from the bones. Instead they may have been chemically altered by the body tissues of the animal meaning that they did not carbonise close into the animal or more likely were covered by other decaying tissue, though evidence of their presence remains. Conclusions/Significance These UV images show that the feathers
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Shop fabric.coms selection of Birds & Feathers products! Find the right Birds & Feathers products for your next project and lets create something together.
Causes of Feather Picking | Lytle Veterinary Clinic
There are both medical and non-medical causes for feather picking. The major medical causes include changes in hormone levels, external and internal parasites, malnutrition, internal disease, and bacterial or fungal infections of the skin and/or feather follicles. Interestingly, and con to popular opinion, external parasites (mites in particular) are extremely rare among caged birds. The non medical causes are psychologic and/or stress related. Infection with the 1-celled intestinal parasite, Giardia, may be related to feather picking. Many birds with giardiasis, especially parakeets, cockatiels and some lovebirds, also show intense feather pulling, self-mutilation and loud screaming Giardiasis is diagnosed by microscopic fecal examination. Treatment is difficult and may be unsuccessful. Further, giardiasis, can be transmitted to people. Feather picking is generally a problem of birds in captivity. Wild birds do not feather pick because they are too preoccupied with their own survival and with ...
Morning Bird Feather Fast Powder 3oz For Moulting Birds
MBP Feather Fast 3oz. Morning Birds Feather Fast is composed of vitamins, minerals and amino acids. Its designed to promote healthy feather growth and good molts.
Missing Feathers Around The Vent Area. Many times you will see hens that have a bare backside. This is common, but the cause could be an infestation of plumage or biting parasites. Hens can be bothered enough by the parasites that congregate near the vent that they will pick themselves bare while trying to rid themselves of the troubling pestilence. For more information on mites and lice, read my article; Hidden Health Problems: Mites And Lice.. Bare Feather Shafts. Another possible sign of parasites is bare feather shafts. If your birds have an inordinate amount of feathers missing fluff and vane, you may have feather lice eating your birds feathers bare. Look for white rice-looking critters running among your birds feathers and treat accordingly. If there are no parasites present, your birds may be coming in contact with something such as a fence or cage that is fraying and destroying their plumage. Observe your birds habits, especially when flying to roosts or using doorways to find the ...
Beyond the Human Eye: Zipping up a Feather
Theres a whole lot of moulting going on at the moment in the bird world, as they begin to shed their well-worn breeding plumage. My wife found this distinctive feather on our garden path last week. Under the microscope the underside of the feather (top photo) reveals the beautiful repeated pattern of rows of barbs attached to the central shaft (rachis). At higher magnification (second photo down) you can see the rows of barbules on each barb, each ending in a tiny hook (barbicel). When a bird preens a feather by drawing it through its beak, its zipping these rows of hooks on adjacent barbules back together again, to restore the feathers aerodynamic efficiency. In the bottom two photographs the feather has been flipped over to view the upper surface and reveal a clue to its identity - the blue iridescence in some of the barbules. It belonged to a magpie. ...
The wing of a hatching-year (first fall) owl shows no contrast, with all feathers glossy, new and unfaded. By the next autumn, as a second-year bird, the owl has replaced its outermost and innermost flight feathers, which contrast with the older, faded retained feathers in the middle of the wing.. Like all banders, saw-whet researchers must infer the age of the owls they catch by examining the molt, or replacement pattern of the birds feathers, especially those in the wings. In owls, complete molt is a process that can take up to four years.. A saw-whet with flight feathers that are all bright, glossy and unworn is an owl that was just born the previous spring - an HY, or hatching-year, bird, in bander jargon. By the following fall, an SY (second-year) owl will have replaced its outermost and innermost wing feathers, with the old, retained juvenal feathers in the middle of the wing now faded and worn. Older birds may have as many as three generations of feathers.. A pigment in owl feathers ...
How Dinosaur Scales became Bird Feathers [glitchesrus 148.1]
Bird Brained - How Dinosaur Scales became Bird Feathers - BBC News How scales turned into feathers The genes that caused scales to become feathers in the early ancestors of birds have been found by US scientists. Read more from BBC News
Popular Red Feather Ornamentals-Buy Cheap Red Feather Ornamentals lots from China Red Feather Ornamentals suppliers on...
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Global Down and Feather Market 2017- Allied Feather & Down, Feather Industries, Down Decor, Down Inc., United Feather & Down,...
This report examines the Down and Feather market standing and opportunity of global plus major regions, from plans of manufacturers, regions, product types and end industries; this report investigates the best manufacturers in global and major regions and splits the Down and Feather market by product type and applications/end industries. The Global Down and Feather…
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Creatures that Defy Evolution - Iron Chariots Wiki
Martin The woodpecker is a very special little bird. The beak of a woodpecker is, like, industrial strength. It is stronger than other birds beaks. He has special feet. Most birds have three toes out the front, one toe out the back, where the woodpecker has two toes out the front, two toes out the back. And thats so he can climb around on a tree trunk--a vertical tree trunk---right side up, upside down, sideways, he can crawl anyway he wants to. He has special tail feathers. His tail feathers are different than other birds tail feathers; theyre more resilient, theyre spongy, and theyre very strong and tough, because he tripods himself with his two feet and his tail feathers. So he grabs a hold of that tree, fans out his tail feathers, and then bangs his head into the tree. now you would think that a woodpecker would go home every night and say to Mrs. Woodpecker, Oh, I got the headache. I was banging my head on a tree all day. But he doesnt. Why? Well, cause God made him with special ...
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Kingfisher feathers - colouration by pigments, spongy nanostructures and thin films | Journal of Experimental Biology
The chemical and physical colouration mechanisms of birds are in principle the same as those applied by other living systems. Pigments, used for chemical colouration, are often deposited in granules, and therefore the granules attached to the walls of the hollow cells of the orange breast feather barbs most probably contain a short-wavelength-absorbing pigment (Fig. 3B,C). The very irregular spatial organisation of the barb cells causes randomisation of the direction of incident light, resulting in diffuse scattering of the little-absorbed long-wavelength light (Fig. 7A).. Although the spatial organisation of the sponge cells inside the kingfishers back and tail feather barbs is irregular (Fig. 4A,B), there still exists sufficient quasi-order (Fig. 4C,D) to create structural colouration, which changes in hue when observed from different directions (Fig. 7). The spectral peak depends on the dimensions of the sponge structures (Dyck, 1971; Finger, 1995; Shawkey et al., 2009). Spongy barbs are ...
feathers on chicks | BackYard Chickens
does anyone know if the feathers on my 2 week old chicks will be the same colour when they get older. they are cross rir/light sussex the wing feathers...
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Many variations on a few themes: a broader look at development of iridescent scales (and feathers) | Journal of The Royal...
Iridescent structures in feathers are typically produced with either laminar or crystal-like nanostructures located in the barbules (Prum 2006). Laminar structures that can result in glossy, black iridescence rely on a single layer of keratin above a layer of melanin (e.g. satin bowerbirds, Ptilonorhynchus violaceus minor; Doucet et al. 2006) or multiple layers of keratin and melanin (e.g. European starlings, Sturnus vulgaris; Cuthill et al. 1999), wherein the interfaces between both air and keratin or keratin and melanin create iridescence (Doucet et al. 2006). Crystal-like nanostructures, such as those found in the peacocks tail (Zi et al. 2003), use ordered arrays of keratin, melanin and air, which give rise to coherent scattering of light waves. While the development of both laminar and crystal-like nanostructures has not been extensively studied, here we summarize possible developmental pathways in the context of general feather development.. Laminar nanostructures require one or more ...
Dying Pheasant tail Feathers
I have some pheasant tail feathers I want to dye , is Rit dye ok? Will it bleed later on ? Any tips on dying feathers would be appreciated.
Microbes and Animal Behavior - microbewiki
Previous studies have focused on the effect of bacterial infections on the production of ornamental traits. However, bacteria not only live inside birds but on the surface, in their feathers. Few bacteria living in feathers will have deleterious effects on their host. A diverse group of species, including keratinolytic (feather-degrading) and non-keratinolytic bacteria, may live in feathers. Studies have indicated that energy trade-offs are involved in the bacterial diversity of a birds feathers, as in males with larger broods having less bacterial diversity on their feathers due to the energy spent foraging instead of preening/sanitational behaviors that may prevent harmful,pathogenic bacteria from growing (18). A 2007 study predicted that a relationship between feather color and bacteria could occur because high-quality males will have more energy than low quality males to allocate to cleaning behaviors and reducing bacterial abundance (19). This would be beneficial, not only in maintaining ...
Dinosaur Feathers Used For Attracting Mates, Research Finds | PlanetSave
Sp far, there hasnt been any direct fossil evidence of feathers in the species that followed Similicaudiptery, but there is a lot of other, strong evidence, that they possessed a feathered tail.. Persons reasons that because the later oviraptor had the same tail structure as the feathered Similicaudipteryx, the tails of later oviraptors still served the same purpose, waving feathered tail fans.. This hypothesis is strongly supported by the structure of the bones and muscles of their tail.. Individual vertebrae at the base of an oviraptors tail were short and numerous, indicating great flexibility. Based on dissections of modern reptile and bird tails, Persons reconstruction of the dinosaurs tail muscles revealed oviraptors had what it took to really shake their tail feathers.. Large muscles extended far down the tail and had a sufficient number of broad connection points to the vertebrae to propel oviraptors tail feathers vigorously from side to side and up and down.. The image that ...
Un]Cannery Row: August 2008
The most common peafowl is the India Blue, the bird with which most of us are familiar. There are also greens, pieds (mottled with white), albino whites, and other varieties. Males have that amazing train of tail feathers that includes long, wispy iridescent eye and sword feathers, held up when they display by a fan of shorter, stiff, dull-brown feathers (see Francoise in the picture, shown from behind, displaying for a lawn chair, poor dear). Wing feathers are brown or white with black bars, and they have a bank of russet feathers on their lower sides, which they beat rapidly when displaying-more crazy peafowl percussion. Their long necks are iridescent blue-green. Legs are featherless, beige, with heavy-duty nails and a bony spur on the inside of each leg a few inches above the foot, used for mid-air sword-fighting with other males ...
Written In Stone...seen through my lens: Guest Post: Before They Took Off - A Study of Feathers and How Birds Gained Flight...
In the newly created placode, the Shh and Bmp2 proteins are expressed in a polarized anterior-posterior fashion, and then subsequently expressed at the tip of the cylindrical feather-germ to facilitate elongation. Next, the genes are expressed in the epithelium separating the barb ridges that are beginning to form, and they begin to establish a growth pattern for each ridge. In pennaceous feathers, the signaling of Shh and Bmp2 proteins then lay down the pattern needed for the helical growth of barb ridges, and the formation of the rachis. In plumulaceous feathers the proteins create a pattern for the growth of barbs much simpler than that in pennaceous feathers. This signaling pattern can be observed in the following figure. ...
Novel Biocomposites with Feather Keratin - Fibres & Textiles in Eastern Europe
This work deals with the preparation and characterisation of cellulose-keratin biocomposites. A method of manufacturing fibrous composite materials by wet spinning is presented. We used natural polymers, biomodified cellulose and keratin obtained from chicken feathers. Keratin waste is a potential renewable starting material. Spinning solutions were prepared from these polymers, and after filtration and aeration they were used for the formation of fibres and fibrids . The investigations included the preparation of biomodified cellulose-keratin spinning solutions of different keratin content, estimation of the influences of formation speed and drawing on the fibre properties, estimation of the sorption properties of the composites obtained. The biomodified cellulose-keratin fibres obtained are characterised by better sorption properties, higher hygroscopicity and smaller wetting angle, than those of cellulose fibres. The introduction of keratin into cellulose fibres lowered their mechanical properties
Satya Feb 06: Interview with Walter Schmidt
I was trying to figure out why different forms of collagen in tendons and skin have different properties. Then I wanted to compare something to collagen, so I tried [keratin] from feathers. When I ground it up-which is really difficult to do because feathers are so tough-it felt just like wood pulp. So I [thought] you should be able to make paper from it, and I did. Cellulose is much weaker than feather fiber and it takes 15 minutes on a machine to turn wood into pulp, while it would take two hours to pulp the feather fiber. Since feathers are much more durable, you could recycle [feather pulp] paper more times. [But still], even if all the feathers were used to make paper, it would only be about three percent of the paper produced in the U.S.-you wouldnt replace paper from wood pulp ...
Researchers Find Banned Antibiotics in Feather Meal | Food Safety News
Researchers at Johns Hopkins Center for a Livable Future (CLF) and Arizona State University tested feather meal - a byproduct made of ground-up poultry feathers commonly added to chicken, swine, cattle and fish feed - and found a surprising variety of drug residues, including fluoroquinolones, a class of antibiotics critical for fighting infections in humans. The findings surprised scientists because the U.S. Food and Drug Administration banned the class of drugs, which includes cipro, in poultry production in 2005 in response to rising fluoroquinolone resistance among Campylobacter bacteria, a leading cause of foodborne illness.. The discovery of certain antibiotics in feather meal strongly suggests the continued use of these drugs, despite the ban put in place in 2005 by the FDA, said David Love, PhD, project director at CLF and lead author of the report, which was published in Environmental Science & Technology. The public health community has long been frustrated with the unwillingness of ...
Nanomaterials inspired by bird feathers turn light into color
San Diego CA (SPX) May 25, 2015 - Inspired by the way iridescent bird feathers play with light, scientists have created thin films of material in a wide range of pure colors - from red to green - with hues determined by physical str
Feathers. Evidence for feathered oviraptorosaurs exists in several forms. Most directly, four species of primitive ... is used to support a fan of feathers. Similarly, quill knobs (anchor points for wing feathers on the ulna) have been ... Oviraptorosaurs ("egg thief lizards") are a group of feathered maniraptoran dinosaurs from the Cretaceous Period of what are ... Ji, Q.; Currie, P.J.; Norell, M.A.; Ji, S.A. (1998). "Two feathered dinosaurs from northeastern China". Nature. 393 (6687): 753 ...
Similarly to down feathers of modern birds, the feathers found in Dilong were branched but not pennaceous, and may have been ... Feathers. Long filamentous structures have been preserved along with skeletal remains of numerous coelurosaurs from the ... Primitive feathers have been identified in fossils of two species, and may have been present in other tyrannosauroids as well. ... The presence of feathers in basal tyrannosauroids is not surprising, since they are now known to be characteristic of ...
Feathers and color. Feather impressions on the left arm from the holotype on display at the Paleozoological Museum of ... These unique feathers known as EBFFs (elongated broad filamentous feathers) were first described by Xu et al. 2009, based on ... The first feather impressions were found in the holotype specimen, consisting of short, slender filamentous feathers on the ... Most other primitive feathered dinosaurs have down-like feathers made up of two or more filaments branching out from a common ...
Feathers have similar keratins and are extremely resistant to protein digestive enzymes. The stiffness of hair and feather is ... In hair and feathers. Over 90% of the dry weight of hair comprises proteins called keratins, which have a high disulfide ... The high disulfide content of feathers dictates the high sulfur content of bird eggs. The high sulfur content of hair and ... feathers contributes to the disagreeable odor that results when they are burned. ...
Specimens of Archaeopteryx
Only the imprints of wing and tail feathers are present, and all sign of feathers comes from the counterslab. No body feathers ... The feather has a total length of 58 mm, and the vane is 12 mm at the widest margin. The end of the feather has an obtuse angle ... The isolated Archaeopteryx feather. Archaeopteryx 14: 1-26; Eichstätt. *^ Feduccia, A.; Tordoff, H. B. (1979). "Feathers of ... The feather could have been colonized by bacteria during the feather's travel time, as it likely did not sink to the bottom ...
Feathered beaming shows a gradual change in the speed of notes. It is shown with a primary straight beam and other diagonal ... These secondary beams suggest a gradual acceleration or deceleration from the first note value within the feathered beam to the ... secondary beams (that together resemble a feather, hence the name). ...
Haim Be'er (2004). Feathers. Waltham, Massachusetts: Brandeis University Press. A. B. Yehoshua (2004). Five Seasons. Orlando: ...
Love Pageant Rally
Feathers... Bands... Beads... Banners, flags, incense, chimes, gongs, cymbals, symbols, costumes, joy." Thousands showed up for ...
A Once and Future Shoreline
... feathers; sea cucumber; Sea Robin; rock crabs; pieces of old rope. In addition to the shoreline etching, the plaza paving ...
Zoharei Chama Synagogue
Be'er, Haim (2004). Feathers. Brandeis University Press. p. 18. ISBN 978-1-58465-371-4. Gordon, Buzzy (2010). Frommer's ...
Tobias, Tobi (July 17, 1989). "Feathers". New York: 53. Berman, Janice (June 30, 1989). "Celebrating Bronislava Nijinska". ...
Feathers. Sequins. Lace. Fantasy. Flash". The New York Times. Retrieved March 21, 2019. his 33-year-old son, Robin, died of ... and a huge feathered Mohawk headdress that was one and a half times taller than her head. Introduced by Jane Fonda with the ...
North Andover, United States: Brickhouse Education Canetti, Y. (2010). Amazing Adaptations! Feathers. North Andover, United ... Who Has Fancy Feathers?. North Andover, United States: BrickHouse Education Canetti, Y. (2020). Leer es peligroso y altamente ...
Feathers. Lace. Broken statuary. Scraps of fabric, or carpet. Everything thick with some dark energy. There was one whole ...
Importation of Plumage (Prohibition) Act 1921
During the First World War feathers were among the luxury items whose import was banned in February 1917, but only for the ... Boase, Tessa (2018). Mrs Pankhurst's Purple Feather. Aurum Press. ISBN 978-1-78131-654-2. Patchett, Merle (2011). "Murderous ... pointing out that the much-prized egret feathers were obtained by shooting birds which had chicks on their nests, and asking " ... Virginia Woolf to write a strong piece published in the Woman's Leader in which she painted pictures of the crowds of feather- ...
Allan Octavian Hume
Hume, A. O. (1874). "Viscount Walden, president of the Zoological Society, on the editor of "Stray Feathers"". Stray Feathers. ... Nov". Stray Feathers. 9 (5&6): 467-471. St. John, O.B. (1889). "On the birds of southern Afghanistan and Kelat". Ibis. 6. 31 (2 ... He founded the journal Stray Feathers in which he and his subscribers recorded notes on birds from across India. He built up a ... But we heartily welcome at the same time the issue of 'Stray Feathers.' It promises to be a useful catalogue of the Editor's ...
The rachis of the tail feathers is dark and there are dark ribs to the feathers. The bill is strong. The tarsus is brown and ... This warbler is large and brownish with broad dark streaks to the feathers of the crown and back and can appear almost babbler- ... Butler, E.A. (1877). "The Avifauna of Mount Aboo and North Gujerat". Stray Feathers. 5: 207-236. Baker, E.C.S. Fauna of British ... Ball, Valentine (1876). "Notes on some birds collected at Sambalpur and Orissa". Stray Feathers. 4: 231-237. Currie, A.J. (1916 ...
The young chicks have no feathers and appear very plump. The mother is fed by her mate through a slit in the seal. The clutch ... The male spreads the preen gland secretion, which is yellow, onto the primary feathers and bill to give them the bright yellow ... When dancing with the feathers of the hornbill, they avoid eating vegetables, as doing so is also believed to produce the same ... Tribesmen in parts of northeastern India and Borneo use the feathers for head-dresses, and the skulls are often worn as ...
p. 5-6. Hume, A. O. (1878). "Gyps tenuirostris Hodgson". Stray Feathers. 7: 326. Deignan, H. G. (1946). "The correct names of ...
Retrieved 10 December 2019.old-form url Hume, A.O. (1875). "Novelties: Pitta gurneyi". Stray Feathers. 3 (4): 296-298. Irestedt ...
Males have a whitish grey cap while females have a brownish grey cap and less gloss on the feathers. They are frugivores, ... doi:10.1111/j.1474-919X.1918.tb00772.x. Hume, AO (1880). "A second list of the birds of North-Eastern Cachar". Stray Feathers. ... Oates, Eugene W (1882). "A list of the birds of Pegu". Stray Feathers. 10 (4): 175-248. Armstrong, James (1876). "Notes on ... and blackish tail and flight feathers. Females have a more brownish-grey crown. Juveniles initially have the crown colour ...
John Webb Singer
"Feathers Gates". National Trust. Retrieved 2019-03-21. Historic England. "GATE PIERS AND FLANK WALLS AT MAIN GATE TO CLIVEDEN, ...
Louis Joachim Munoz
"Sowing the Seed by Albert Alos". Feathers & Ink. Retrieved 2017-04-24. "Opus Dei marks 40 years in Nigeria". Retrieved 2017-04- ...
doi:10.1111/j.1474-919X.1999.tb04258.x. Hume, A. O. (1873). "Novelties". Stray Feathers. 1: 464-483. Koparde, P.; Mehta, P.; ...
Indian jungle crow
The feathers have a purple gloss throughout. The tail of the Indian jungle crow is rounded and the legs and feet are stout. The ... Brooks, W Edwin (1875). "Notes upon a collection of birds made between Mussoori and Gangaotri in May 1874". Stray Feathers. 3: ... Hume, AO (1877). "Corvus macrorhynchos, of Wagler". Stray Feathers. 5: 461-469. Hume, AO (1889). Oates, EW (ed.). The nests and ... Brooks, WE (1875). "Additional notes on birds collected between Mussoori and Gangaotri in May 1874". Stray Feathers. 3: 275-278 ...
Peacock's Feathers. Chapman & Hall, London, 1933. Vicarage Party. Chapman & Hall, London, 1933. Tenderness. A novel. Chapman & ...
International School Ibadan
Patricia Oyelola: A Grand Teacher". Feathers Project. Retrieved 7 September 2014. "SUBURBAN SCHOOLS" (PDF). Fulton History. New ...
Hume, A. O. (1877). "Novelties?". Stray feathers. Journal of ornithology for India and its dependencies. 5: 100-117. Harington ...
Henry St. John Cooper
Fine Feathers! or, The Wife Who Would Be Smart. London, Fleetway House, 1914. From Mill to Mansion. London, Fleetway House, ...
Essex Fells station
"Eagle Feathers". The Madison Eagle. June 26, 1891. p. 3. Retrieved November 22, 2020 - via Newspapers.com. Interstate Commerce ...
Horse Feathers (1932) - IMDb
Horse Feathers (1932) Passed , 1h 8min , Comedy, Musical, Romance , 19 August 1932 (USA) ... Horse Feathers See more » Filming Locations:. Occidental College - 1600 Campus Road, Eagle Rock, Los Angeles, California, USA ... Horse Feathers just may be the wackiest, corniest, dumbest, funniest and just plain craziest movie youve ever seen. It could ...
Ruffled Feathers | The New Yorker
contour feathers | Encyclopedia.com
Source for information on contour feathers: A Dictionary of Biology dictionary. ... contour feathers Feathers that are arranged in regular rows on a birds body, giving the body its streamlined shape. Each has a ... contour feathers Feathers that are arranged in regular rows on a birds body, giving the body its streamlined shape. Each has a ... Similarly, products made from feathers such as pillows, comforters, or down-lined… Sand Volcano , sand volcano A conical body ...
Category:Feathers - Wikimedia Commons
... feather (sco); Fieder (lb); fjør (nn); Fjær (nb); ಗರಿ (kn); feather (en); ريش (ar); Plu (br); ငှက်မွေး (my); 羽毛 (yue); Toll (hu ... bird feather, feathers, plumage (en); ريش الطيور, ريش الطائر (ar); Pluek, Pluñv (br); Armsvingfjør, Vengdekkfjør, Armdekkfjør, ... FMIB 50771 Feathers of Petrel pllucked by a Skua Gull, Disappointment Island, Auckland Islands.jpeg 1.165 × 807; 365 kB. ... Media in categorie "Feathers". Deze categorie bevat de volgende 127 bestanden, van in totaal 127. ...
Horse Feathers on Spotify
Horse Feathers has created an album that differs enough from its predecessors to suggest that the cat might get out of the bag ... Horse Feathers (Live Session, Nashville, TN, 2019), Dont Mean to Pry, Without Applause, Drain You b/w Bonnet of Briars, ... Horse Feathers, Category: Artist, Albums: Appreciation, So It Is With Us, Cynics New Year, Thistled Spring, House With No Home ... Listen to Horse Feathers now.. Listen to Horse Feathers in full in the Spotify app ...
... everything you need for studying or teaching Fine Feathers. ... Immediately download the Fine Feathers summary, chapter-by- ... Fine Feathers Summary. W. W. Jacobs. Everything you need to understand or teach Fine Feathers by W. W. Jacobs. ... FINE FEATHERS Mr. Jobson awoke with a Sundayish feeling, probably due to the fact that it was Bank Holiday. He had been aware, ...
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Feather pecking - Wikipedia
In feather-plucking, birds, often housed in isolation, remove feathers from their own body; in feather pecking, however, birds ... Feather pecking is also distinct from another psychopathological behaviour called feather-plucking or feather-picking. ... Eating feathers increases gut transit indicating that feather pecking and feather eating have a different motivational ... with high feather pecking birds showing more feather pecking than low feather pecking birds from the second generation onwards ...
Fin & Feathers opens in Atlanta
Fin & Feathers is open from 5 p.m.-1 a.m. Monday-Thursday; 5 p.m.-3 p.m. Friday-Saturday; and 5 p.m.-midnight Sunday. ... Fin & Feathers opened in late July at 360 Edgewood Ave. SE, the latest venture from Damon A. Johnson, who previously worked at ... Fin & Feathers now open for Nu American cuisine, cocktails on Edgewood Avenue. ...
How to Clean Feathers | eHow
Over the years, these art pieces collect dust and dirt that prevent the feathers from looking their best. Antique pieces ... Feathers are used to adorn many craft and art pieces. ... Feathers are used to adorn many craft and art pieces. Over the ... Then gently brush the feathers with the mild detergent solution (working in the direction of the feathers) to remove embedded ... Rinse the utensil thoroughly and brush the feathers with just water to remove any residue. Then blow them dry with a hair dryer ...
The Science of Feathers | Audubon
When feathers containing these unique chemicals are exposed to feather-degrading bacteria, they deteriorate more slowly than ... their digestive enzymes change those molecules into new pigments that are deposited in feathers. And those feathers, in turn, ... A feather represents an investment of a year or more on which a bird stakes its life. Of necessity, a bird tries to keep it in ... In many feathers, such as those that form the shape of the wings and tail, the barbs are then further subdivided into twigs, so ...
City Chicken Roosts Ruffle Feathers
California solar power plants singeing bird feathers
"A migrating bird has to be in top form, having the flight feathers in really good shape. If some of its flight feathers are ... California solar power plants singeing bird feathers. K Kaufmann, The Desert Sun Published 9:17 p.m. ET Nov. 10, 2013 , Updated ... "If some of its flight feathers are damaged, what does that mean for the rest of the birds migration?" he said. "It weakens ... "A migrating bird has to be in top form, having the flight feathers in really good shape," said ornithology collections manager ...
The portion of the feather that extends to either side of the rachis and is composed of the barbs and their associated ... The portion of the feather that extends to either side of the rachis and is composed of the barbs and their associated ... feather vane. Go to external page http://purl.obolibrary.org/obo/UBERON_0008287 Copy ... structures [ https://en.wikivet.net/Feather_-_Anatomy_%26_Physiology http://orcid.org/0000-0002-6601-2165 ] ...
Neanderthals Wore Colorful Feathers, Study Suggests
Neanderthals plucked feathers from falcons and vultures, perhaps for symbolic value, scientists find, adding evidence that our ... Neanderthals Wore Colorful Feathers, Study Suggests. By Charles Q. Choi, Live Science Contributor , February 22, 2011 01:53pm ... We know that the use of bird feathers was very widespread and that humans have always attributed a broad and complex value to ... An artists depiction of a Neanderthal decorated with feathers.. Credit: Credit: Mauro Cutrona. Neanderthals plucked the ...
Dinosaurs Changed Their Feathers With Age
A dinosaurs odd switch from ribbons to quills suggests ancient animals experimented with a diversity of feather types, a new ... On its tail, each feather was just 1.6 inches (4 centimeters) long, while on its arms a typical feather was less than 0.8 inch ... Modern birds continuously replace old feathers with new ones. But birds completely change the types of feathers in their coats ... Similicaudipteryxs odd changes suggest that early birds and feathered dinosaurs experimented with a diversity of feather types ...
The Ruffled Feathers - BrooklynVegan
'Feathers' by rowanmacs |...
Feathers Lyrics - Kidney Thieves
Lyrics to Feathers by Kidney Thieves: Rain made a place / For us to swim, to play / Inopportune devotion cannot be sound / So I ... So I take my lot of a few feathers from the sky. Into a ritual and let my spirit fly. Simple pleasures. Falling feathers. ... Simple feathers. Falling feathers. 7000 reasons to dream, 1 reason to live, 1 reason to me. ... Feathers Lyrics Languages Arabic Deutsch Greek English Spanish French Italian Japanese Korean Netherlands Portuguese Russian ...
Fall Fashion Trend: Feathers
The Wild Feathers - BrooklynVegan
Feathers: Created or Evolved?
The author notes that feathers have separate structures which must work together but that this is not necessarily evidence that ... "There are seven basic types of feather: contour feather, semiplume, down feather, powder down feather, hypopenna, filoplume and ... Feathers: Created or Evolved? Paul Keck [Last Update: November 25, 1992] ob Bales has been using the feather as an example of ... Contour feathers consist of a vane with its inner and outer webs, and a supportive shaft. Feather barbs branch off the shaft, ...
ArtMinds™ Feathers, Natural Mix
This set includes a variety of feather colors and styles so you can create a full range of textured projects. ... A craft room essential, feathers can be used for arts and crafts projects, home décor accents, wearables and so much more. ... Rated 5 out of 5 by KP artist from Feathers are the finishing touch. So many feathers on a small package. I purchased 5 ... Supply your creativity with these natural feathers. A craft room essential, feathers can be used for arts and crafts projects, ...
How Feathers Evolved
... they developed fluff that eventually became feathers. There must have been some benefits from the plumage that eventually ... http://youtu.be/hPLgfGX1I5Y] (YouTube link)We now know that many dinosaurs had feathers; the question is, why? They couldnt ... Tags: Feathers, Evolution, Birds, Dinosaurs. Like this? Please share & join us Related Neatorama Posts. *Squirrel-Tailed ... We now know that many dinosaurs had feathers; the question is, why? They couldnt fly, but for some reason, they developed ...
Trump ruffles feathers before UK visit | Reuters Video
Feather on Steam
Feather is a multiplayer game about exploration, relaxation and immersion. Transform yourself into a bird, take flight, and ... "Feather does have its secrets - its got a big, delightful one, too - but it is not a game meant for finishing. Feather is a ... Feather is a relaxing bird simulation perfect for unwinding. Whether solo or with other online players, Feather will have you ... Feather is a multiplayer game about exploration, relaxation and immersion. Transform yourself into a bird, take flight, and ...
feather-light - Wiktionary
Feather | Encyclopedia.com
Feathers grow only along certain definite tracts (pterylae), which vary in different groups of birds. ... feathers, outgrowths of the skin, constituting the plumage of birds. ... Feathers can be divided into distinct types: contour feathers, down feathers, intermediate feathers, filoplumes, powder down, ... Feathers and fashion. The Chinese of 500 c.e. used feathered fans. Robin Hood of merry old England wore a feather in his hat. ...
LIFE: A Turkey Feather Wedding
Horse FeathersPlumageBirds of a FeColorsDinosaurFossilsKeratinContour feathersNatural feathersPigmentsBarbs and barbulesBarbules2016QuillStructuresColorful FeathersChickenTurkey FeathersTypes of feathersDinosaurs had feathersSpeciesTheropodsMelanosomesTailFossil feathersOstrich featherFluffyParrot FeatherSuggestsVaneFlightExtinctPlumesArtist'sFibersEarly birdsType of featherResearchersInsulationAncestorsAdornYear'sRepeatedlyAssortmentWhite featherSingle featherPoultryMadeMildFractalFoundFluffWingsColoursElectronRinse
- Horse Feathers' just may be the wackiest, corniest, dumbest, funniest and just plain craziest movie you've ever seen. (imdb.com)
- Horse Feathers has created an album that differs enough from its predecessors to suggest that the cat might get out of the bag. (spotify.com)
- Listen to Horse Feathers now. (spotify.com)
- a new The Marx Brothers Silver Screen Collection - Restored Edition on Blu-ray on 10/18, featuring the recent 4K restorations of The Cocoanuts , Animal Crackers , Monkey Business , Horse Feathers , and Duck Soup . (thedigitalbits.com)
- Universal is confirmed to be preparing to release a new Marx Brothers set, The Marx Brothers Silver Screen Collection - Restored Edition on Blu-ray on 10/18, set to include The Cocoanuts , Animal Crackers , Monkey Business , Horse Feathers , and Duck Soup . (thedigitalbits.com)
- Horse Feathers feels like a secret you don't really want to share. (first-avenue.com)
- But Horse Feathers hasn't gained accessibility at the expense of quality, nor at the expense of their signature instrumentation ("The Hex" might be the only R&B/soul song where the rhythmic lead is played on banjo). (first-avenue.com)
- For those who crave what NPR called "the densely pretty seethe of Horse Feathers' earlier ballads", the album delivers "Born in Love" and "On the Rise", accentuating the string surge with Hammond organ, piano, tambourine, and finger snaps. (first-avenue.com)
- After a while of bouncing between three states, as well as stops in Camas, Washington to finish Appreciation with longtime compatriot Skyler Norwood at Miracle Lake Studios, Ringle is finally settling down just in time to get ready to hit the road with Horse Feathers in support of this new album. (first-avenue.com)
- But they're going to have to make room in the club house for a lot more people - with this album, the Horse Feathers secret is officially out. (first-avenue.com)
- The rump area over the uropygial gland and the tail are often the first body regions to show signs of plumage damage due to feather pecking, followed by the neck, wings and back,   although it should be noted that in the ostrich which has a similar pattern of feather pecking development, the uropygial gland is absent. (wikipedia.org)
- Newfound fossils of a feathered dinosaur suggest that the extinct reptiles might have possessed a diversity in plumage types that puts modern birds to shame. (nationalgeographic.com)
- But birds completely change the types of feathers in their coats just once their entire lives: when they switch from warm down to their adult plumage. (nationalgeographic.com)
- For millennia birds have been prized, even hunted, for their beautiful plumage but what makes their feathers so colourful? (ox.ac.uk)
- To describe the ostrich plumage as the king of all birds feathers may seem odd bearing in mind that the ostrich is a flightless bird. (symbaloo.com)
- Many groups view these filaments as proto-feathers, the evolutionary predecessors to the fine plumage of birds. (scienceblogs.com)
Birds of a Fe4
- Birds of a Feather. (authorstream.com)
- Travel can test the strongest of relationships, but when mayhem and mishap are thrown into the mix, how closely will our Birds of a Feather stick together? (itv.com)
- Birds Of A Feather has been commissioned for ITV by Comedy Commissioning Editor Saskia Schuster. (itv.com)
- Cast and crew members share an inside look at the filming of Birds of a Feather, back after a 15-year hiatus. (apple.com)
- Using similar techniques, Prum and others have also been able to reconstruct some of the bright colors sported by feathered dinosaurs up to 150 million years ago. (audubon.org)
- Some feather colors-reds, oranges, yellows-result from pigments. (audubon.org)
- This set includes a variety of feather colors and styles so you can create a full range of textured projects. (michaels.com)
- I purchased 5 different colors of feather packs. (michaels.com)
- Much as I love all the new theories (new since my childhood anyway) about dinosaur coloring, and feathers, it mostly means that the kids' books I read to my son about dinosaurs feature animals who appear to be wearing fringed feather sleeves, in lurid colors, over a typical scaly dinosaur skin. (metafilter.com)
- This seemingly small bag produced an amazing amount of feathers that came in vibrant colors, all shapes and sizes. (michaels.com)
- Rated 5 out of 5 by danelover61 from great colors and lots in the bag well, they're feathers, colors are vibrant, good value. (michaels.com)
- Feather melanin is responsible for rusty-red to jet-black colors, and produces glossy iridescence. (nsf.gov)
- Now that we have demonstrated that melanin can be preserved in fossils, scientists have a way to reliably predict, for example, the original colors of feathered dinosaurs,' said Prum. (nsf.gov)
- By contrast, the older dinosaur sported long quills, with each tail feather measuring 13.7 inches (35 centimeters) long and a typical arm feather measuring roughly 9.8 inches (25 centimeters) long. (nationalgeographic.com)
- First Dinosaur Feathers for Show, Not Flight? (nationalgeographic.com)
- That's an important piece of information, since many of these dinosaur groups start off small, have feathers, and then get big. (nationalgeographic.com)
- That God, what a cheeky fellow - putting down fake dinosaur bones and fake dinosaur feathers! (metafilter.com)
- The discovery of a new dinosaur species in Siberia suggests most probably had feathers. (ibtimes.com)
- This does mean that we can now be very confident that feathers weren't just an invention of birds and their closest relatives, but evolved much deeper in dinosaur history," said paleontologist Stephen Brusatte of the University of Edinburgh in Scotland. (ibtimes.com)
- Since discovering Dinosaur Feathers earlier this year , the trio has been getting love from Paste , The New York Times and many a blogger. (hearya.com)
- Much like the heralded debut from Girls , Dinosaur Feathers' Fantasy Memorial has influences rooted in 50's and 60's pop music. (hearya.com)
- Much like The Love Language's lo-fi debu t, which also had a few bumps in production, the talent of Dinosaur Feathers is undeniable. (hearya.com)
- HearYa readers, meet Dinosaur Feathers. (hearya.com)
- About 71 million years ago, a feathered dinosaur that was too big to fly rambled through parts of North America, likely using its serrated teeth to gobble down meat and veggies, a new study finds. (livescience.com)
- What colours were dinosaur feathers? (scienceblogs.com)
- Beautiful fossils, mainly from China, show that several species of dinosaur had feathers akin to the flight-capable plumes of modern birds. (scienceblogs.com)
- Closer study of a number of fossilized bird feathers by scientist Jakob Vinther of Yale University in New Haven, Conn., revealed that organic imprints in fossils--previously thought to be carbon traces from bacteria--are fossilized melanosomes, the organelles that contain melanin pigment. (nsf.gov)
- The fossils of some small meat-eating dinosaurs were covered in filaments that are widely thought to be the precursors of feathers. (scienceblogs.com)
- They're also found in the same parts of the fossils as they are in modern feathers. (scienceblogs.com)
- That's because the feathers are made up of the protein keratin, which forms hollow strong tubes. (loe.org)
- A micrograph of feathers (seen here) shows hollow keratin fibers, a light, tough material. (treehugger.com)
- It suggests that, like these latter structures, feather nanostructures may have evolved by a process of self-assembly (the phase separation of keratin from the cytoplasm of the spongy barb cells). (ox.ac.uk)
- That these barb nanostructures could be self-assembled intracelllularly from beta-keratin, the most basic constituent of feathers, suggests that there may be little or no cost involved in producing such structural colours. (ox.ac.uk)
- They're more resistant to both chemical and physical decay than the keratin of feathers and hair. (scienceblogs.com)
- In feathers, the water fills the keratin matrix like air in a balloon. (newscientist.com)
- contour feathers Feathers that are arranged in regular rows on a bird's body, giving the body its streamlined shape. (encyclopedia.com)
- Contour feathers consist of a vane with its inner and outer webs, and a supportive shaft. (talkorigins.org)
- Interlocking barbs keep contour feathers firm and smooth. (talkorigins.org)
- As far as I can tell, the interlocking mechanism is only found on contour feathers, i.e. those covering the body, wings, and tail. (talkorigins.org)
- Contour feathers, the most conspicuous of these types, are found on the wings and tail. (encyclopedia.com)
- The down feathers, considerably softer and fluffier than the contour feathers, are located at the base of the contour feathers. (encyclopedia.com)
- For instance, melanosomes , granules filled with the pigment melanin, produce blacks, browns and reddish-browns in feathers, whereas other pigments such as carotenoids produce the majority of bright yellow, orange or reddish colours. (ox.ac.uk)
Barbs and barbules1
- She 3D-printed structures that mimic the feathers' vanes, barbs and barbules to better understand their properties--for example, how the underside of a feather can capture air for lift, while the top of the feather can block air out when gravity needs to take over. (eurekalert.org)
- In many feathers, such as those that form the shape of the wings and tail, the barbs are then further subdivided into twigs, so to speak, called barbules. (audubon.org)
- Feather barbs branch off the shaft, and barbules branch off the barbs. (talkorigins.org)
- Scanning electron micrograph of a contour feather of a Common Murre ( Uria aalge ) showing the hooked distal barbules interlocking with the grooved proximal barbules. (talkorigins.org)
- Sullivan found that barbules-- the smaller, hook-like structures that connect feather barbs-- are spaced within 8 to 16 micrometers of one another in all birds, from the hummingbird to the condor. (eurekalert.org)
- The first time I saw feather barbules under the microscope I was in awe of their design: intricate, beautiful and functional," she said. (eurekalert.org)
- As we studied feathers across many species it was amazing to find that despite the enormous differences in size of birds, barbules spacing was constant. (eurekalert.org)
- Feathers & Flesh is the sixth studio album by the Swedish metal band Avatar, released on May 13, 2016. (wikipedia.org)
- On March 3, 2016, Avatar revealed the name of the new album, Feathers & Flesh, as well as a release date of May 13, 2016 via their official website, and through social media. (wikipedia.org)
- On March 17, 2016, the singles "Regret" and "House of Eternal Hunt" were released to help kick off pre-ordering of merchandise bundles for Feathers & Flesh. (wikipedia.org)
- The quill is the hollow, colorless portion rooted in the skin, from which the feather derives nourishment while it is growing. (encyclopedia.com)
- From the quill to the tip of the feather is the shaft. (encyclopedia.com)
- Until the advent of steel pens in the mid-nineteenth century, the best writing instruments were made from the quill of goose feathers. (encyclopedia.com)
- The researchers estimate that the spacing would allow for a total of 14 quill knobs and feathers on the velociraptor's arms. (nationalgeographic.com)
- The presence of quill knobs in an animal like this one can be explained by the fact that these dinosaurs used their feathered limbs to generate additional thrust during running," Chiappe said. (nationalgeographic.com)
- ARS chemist Walter Schmidt developed the technology to clean feathers and separate them into chopped fibers and quill pieces. (usda.gov)
- There were very, very strange structures in the history of feathers. (nationalgeographic.com)
- They found that the color-producing structures in feathers appear to self-assemble in much the same manner. (redorbit.com)
- We have found that nature elegantly self assembles intricate optical structures in bird feathers. (redorbit.com)
- A new X-ray analysis of the structure of feathers from 230 bird species, led by Vinod Saranathan of Oxford University's Department of Zoology, has revealed the nanostructures behind certain colours of feather, structures that could inspire new photonic devices. (ox.ac.uk)
- Despite this apparently chaotic arrangement the team's X-ray scattering experiments found a kind of order (known as 'quasi-order') in the variation and sameness of feather structures that accounts for their unusual optical qualities. (ox.ac.uk)
- The team used a scanning electron microscope to show that dark bands of the feather preserved the arrangement of the pigment-bearing structures as a carbon residue--organized much as the structures are in a modern feather. (nsf.gov)
- And among these filaments, a team of Chinese and British scientists have found the distinctive signs of melanosomes, small structures that are partly responsible for the colours of modern bird feathers. (scienceblogs.com)
- In 2008, Jakob Vinther from Yale University found these pigmented structures in the fossil feather of a Cretaceous bird, and concluded that it probably had black and white stripes . (scienceblogs.com)
- Meyer says that artificial materials engineered to mimic feathers could be used for self-healing structures , like antennae that repair themselves in the rain. (newscientist.com)
- Ignite imaginations with colorful feathers! (michaels.com)
- Heated chicken feathers can efficiently store hydrogen without a huge price tag, say chemical engineers at the University of Delaware. (loe.org)
- Chemical engineers at the University of Delaware say toasted chicken feathers can outperform other hydrogen storage materials, and they do it at a fraction of the cost. (loe.org)
- Using chicken feathers as a storage material allows hydrogen to be kept in a much smaller space. (loe.org)
- The researchers estimate that a fuel tank made of chicken feathers would only carry a price tag of about $200 dollars, while a tank made of nanotubes or hydrides could be in the millions. (loe.org)
- To learn more about the energy potential of chicken feathers, click here. (loe.org)
- In a recent exhibit in London, a circuit board made from soybeans and chicken feathers drew a great deal of attention. (treehugger.com)
- Agricultural Research Service (ARS) scientists who have developed a method to turn chicken feathers into plastic products are continuing to bring the technology closer to the marketplace. (usda.gov)
- According to Barone, the material is made on traditional plastics processing equipment using chopped chicken feathers and other easily obtainable, naturally derived materials. (usda.gov)
- Fuel from Chicken Feathers? (alternative-energy-news.info)
- Professor Manoranjan 'Mano' Misra and his team members at the University of Nevada discovered that chicken feather meal consists of processed chicken feathers, blood, and innards. (alternative-energy-news.info)
- Chicken feather meal is processed at high temperatures with steam. (alternative-energy-news.info)
- Chicken feather meal has high percentage of protein and nitrogen. (alternative-energy-news.info)
- The researchers have paid attention to the 12% fat content of the chicken feather meal. (alternative-energy-news.info)
- They have extracted fat from chicken feather meal using boiling water and processing it into biodiesel. (alternative-energy-news.info)
- Other research is going on regarding chicken feather meal. (alternative-energy-news.info)
- Professor Richard P. Wool of the chemical engineering department of the University of Delaware, is trying to carbonized chicken feathers. (alternative-energy-news.info)
- This type of chicken feather bears a resemblance to highly versatile (and tiny) carbon nanotubes. (alternative-energy-news.info)
- This chicken feather can be utilized to store hydrogen for fuel-cell vehicles . (alternative-energy-news.info)
- If we visualize carefully we can see that very tiny natural sponges of chicken feathers have a big weight advantage over metal hydride storage. (alternative-energy-news.info)
- If you thought most bridesmaids' dresses were hideous, imagine having to wear one made of turkey feathers. (yahoo.com)
Types of feathers1
- In past times, feathers were probably first used as insulation, much like hair in mammals, and were probably hair-shaped, as some of those other types of feathers mentioned above still are. (talkorigins.org)
Dinosaurs had feathers1
- Probably that means the common ancestor of all dinosaurs had feathers," Godefroit said. (ibtimes.com)
- Feathered spirit masks, made by the Tapirapé of the Amazon, play an important role in dry-season ceremonies performed by the Bird Societies as they circle their village and sing the songs of their respective bird species. (encyclopedia.com)
- Researcher Tarah Sullivan, who earned a Ph.D. in materials science from the Jacobs School of Engineering at UC San Diego, is the first in about two decades to take a detailed look at the general structure of bird feathers (without focusing on a specific species). (eurekalert.org)
- MDARD Weed Risk Assessment for Parrot Feather (Myriophyllum aquaticum) - This document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to cause harm. (michigan.gov)
- These results may lead to predicting feather color in ancient birds and related species,' said H. Richard Lane, program director in the National Science Foundation's Division of Earth Sciences, which funded the research. (nsf.gov)
- Species like Caudipteryx and the four-winged Microraptor had true feathers with asymmetric vanes arranged around a central shaft. (scienceblogs.com)
- Researchers had previously found evidence of feathers in many theropods, the group of two-legged dinosaurs that includes velociraptors. (nationalgeographic.com)
- And not just any dinosaurs, but two-legged carnivorous, feathered 'theropods' like the 30-inch-tall Bambiraptor -- somewhat less cuddly than its namesake. (freerepublic.com)
- But they were in fact melanosomes in feather cells. (audubon.org)
- Striped fossil feather and recent woodpecker feather show melanosomes in dark, but not light, areas. (nsf.gov)
- His study shows that melanosomes have been preserved in the same way in the filaments of Sinosauropteryx as they were in the true feathers of early birds. (scienceblogs.com)
- Last year, Vinther reported that the layers of melanosomes in another fossil feather would have given it an iridescent sheen, much like the gloss on the wing of a starling. (scienceblogs.com)
- In the lower right of the picture, the white hen has lost her tail feathers and the brown hen has been feather pecked on the thigh and wing. (wikipedia.org)
- During aggressive encounters, hens peck exclusively at the top of the head or the comb, whereas during feather pecking, the areas of the body that are usually targeted are the base of the tail over the uropygial or preen gland, the back, the tail feathers and the wing feathers. (wikipedia.org)
- On its tail, each feather was just 1.6 inches (4 centimeters) long, while on its arms a typical feather was less than 0.8 inch (2 centimeters) long. (nationalgeographic.com)
- The Native American war bonnet was made out of feathers from a golden eagle's tail. (encyclopedia.com)
- In the feather position, the tail of SS2 is folded 65 degrees upwards with reference to the fuselage (pictured above). (wired.com)
- In some cases, the fossil feathers are clearly striped by bands of pigment and the alleged eumelanosomes only turn up in the dark ones, just as you'd expect. (scienceblogs.com)
- In ancient Egypt, the ostrich feather was a symbol of truth. (encyclopedia.com)
- Dwarf parrot feather" and "dwarf red parrot feather" are common names for a dwarf selection sold in trade. (michigan.gov)
- Parrot feather can be found in at least 26 states, including those along the Eastern, Southern, and Western coasts. (michigan.gov)
- As with facial cues in humans and other primates, parrot feather fluffing or facial blushing are dependent upon the environment: these signals occur in particular social contexts and provide information to parrots (and people) in close proximity. (forbes.com)
- Very young dinosaurs are thought to have been covered in down, so the new find suggests that dinosuars went through at least three stages of feather types: full down, to a mix of down and 'ribbons,' to down and quills. (nationalgeographic.com)
- There is often a small second vane, the aftershaft , near the base of the feather. (encyclopedia.com)
- On flight feathers, the barbs all grow in the same plane, like an espaliered fruit tree tacked to a sunny wall. (audubon.org)
- A migrating bird has to be in top form, having the flight feathers in really good shape," said ornithology collections manager Kimball L. Garrett of the Museum of Natural History of Los Angeles County, who has not seen the picture from Ivanpah but has been concerned about bird deaths at large solar projects. (usatoday.com)
- If some of its flight feathers are damaged, what does that mean for the rest of the bird's migration? (usatoday.com)
- A migrating bird has to be in top form, having the flight feathers in really good shape. (usatoday.com)
- They detail their findings in the Jan. 16 issue of Science Advances in a paper titled "Scaling of bird wings and feathers for efficient flight. (eurekalert.org)
- Chiappe speculates feathered dinosaurs ran while flapping their feathered forelimbs, and that flight may have originated as a byproduct of this behavior. (nationalgeographic.com)
- Potentially the [feathers] could have been used in the ancestor of birds and velociraptors for flight, or more likely as a gliding function," Turner said. (nationalgeographic.com)
- The team at Scaled Composites and Virgin Galactic passed a milestone today with the first feathered flight of SpaceShipTwo. (wired.com)
- After establishing a stable glide, SS2 was put into the feather configuration which was developed by Burt Rutan with the SpaceShipOne program as a way to simplify reentry into the atmosphere after achieving sub-orbital flight. (wired.com)
- The feathered portion of the flight is designed to be simpler than flying the spaceship back into the atmosphere as was done by the X-15 back in the 1960s . (wired.com)
- During today's test flight Siebold kept SS2 in the feather position for approximately one minute and 15 seconds with a descent rate of 15,500 feet per minute. (wired.com)
- Running for the duration of the Easter school break will be the fact finding 'Feathers and Flight' trail. (rafmuseum.org.uk)
- 1) The Feathers and Flight trail runs from 8-23 April. (rafmuseum.org.uk)
- The younger dinosaur's ribbonlike feathers are superficially similar to some specialized plumes seen today, for example, on birds of paradise . (nationalgeographic.com)
- Calamagrostis brachytricha , which is also known as foxtailgrass for its plumes of seed heads in fall, needs more moisture than feather reedgrass. (bhg.com)
- An artist's depiction of a Neanderthal decorated with feathers. (livescience.com)
- Fabrics with higher thread counts allow fewer feathers to escape through the fibers, and covered comforters only need to be cleaned every three to five years. (ehow.com)
- Similicaudipteryx' s odd changes suggest that early birds and feathered dinosaurs experimented with a diversity of feather types and a variety of ways to use them, 'which only later stabilized to the more conservative system we see now with modern birds,' Xu said. (nationalgeographic.com)
Type of feather1
- I think that the common ancestor of dinosaurs probably had feathers, and that all dinosaurs had some type of feather, just like all mammals have some type of hair. (ibtimes.com)
- A few years ago a team of researchers took a close look at some fossil bird feathers preserved in 50 million-year-old slale deposits in Germany. (audubon.org)
- Researchers are not sure what the velociraptor's feathers were used for, however. (nationalgeographic.com)
- Stats tell us that if we take into account the amount of feather meal generated by the poultry industry each year, researchers could produce 153 million gallons of biodiesel annually in the U.S. and 593 million gallons worldwide. (alternative-energy-news.info)
- The researchers found that when they soaked the feathers in water, it was absorbed by this spongy material. (newscientist.com)
- Or how else do we explain the preponderance of feathers in this year's collections? (interviewmagazine.com)
-  Feather pecking occurs when one bird repeatedly pecks at the feathers of another. (wikipedia.org)
- Marc Meyers at the University of California, San Diego and his colleagues repeatedly bent vulture feathers nearly in half, soaked them in water, and let them dry out again to test how much a bath can repair a feather , and how that process works. (newscientist.com)
- Kids can get creative with this feather assortment, perfect for all kinds of arts and crafts projects. (michaels.com)
- Feathers are made up of a spiny central structure called the axis and flat side branches called barbs. (encyclopedia.com)
- Queen Alexandra of England made a statement by getting rid of all of her own hats with feathers on them in 1906. (encyclopedia.com)
- As the Feb. 9, 1948, issue of LIFE made plain, in an engaging article titled "LIFE Goes to a Turkey Feather Wedding," turkey was the theme of the evening at Ehrhart's nuptials - not merely on the menu, but on the attendants and on the happy bride herself. (yahoo.com)
- This luxurious single-breasted overcoat with applied feathers was made by hand using a sophisticated technique. (prada.com)
- Then gently brush the feathers with the mild detergent solution (working in the direction of the feathers) to remove embedded grime. (ehow.com)
- But unlike a simple hair, a growing feather branches into a structure of fractal complexity. (audubon.org)
- Dino-Era Feathers Found Encased in Amber. (nationalgeographic.com)
- Bob prompted me to investigate the feather issue, and I would like to share what I found. (talkorigins.org)
- Feathers are the horny outgrowth of skin found on birds. (encyclopedia.com)
- But the bright blue feathers found in many birds, such as Bluebirds and Blue Jays, are instead produced by nanostructures. (redorbit.com)
- Previous research by Schmidt and Barone found feather fiber could be added into currently used plastics to make composites. (usda.gov)
- Working with Yale paleontologist Derek Briggs and Yale ornithologist Richard Prum, Vinther analyzed a striped feather found in 100 million-year-old rocks in Brazil. (nsf.gov)
- They couldn't fly, but for some reason, they developed fluff that eventually became feathers. (neatorama.com)
- For example, my grey parrots fluff their facial, head and body feathers when they sit next to me or when I talk with them. (forbes.com)
- All parrots can and do fluff their facial and head feathers in social contexts, and it is likely that all parrots blush, too, although most of them conceal their blushes under facial feathers. (forbes.com)
- Despite the absence of facial muscles, macaws' facial skin has contractile properties that allow them to fluff or sleek specific facial and head feathers independently of each other, or to blush their featherless "cheek" patches. (forbes.com)
- For Yanomamö men of the Amazon, their feathered armbands worn high on their upper arms gave them the appearance of having wings, thereby bringing them closer to bird spirits. (encyclopedia.com)
- Some primitive birds boasted four wings, before evolution led them to ditch their hind feathers in favor of webbed or scaly feet, scientists in China said on Thursday. (rawstory.com)
- Birds have evolved to produce shorter and middle wavelength colours such as violet, indigo, blue and green structurally instead by the scattering of light photons by nanoscale sub-surface features in the feathers that are called biological photonic or biophotonic nanostructures. (ox.ac.uk)
- Using such high-tech tools as electron microscopy and high-speed video, they've been learning that feathers are multitaskers, carrying out multiple jobs simultaneously. (audubon.org)
- An electron microscope revealed that the surface of some feathers was covered with something that looked like a squashed shag carpet-a landscape of tightly packed cylindrical blobs. (audubon.org)
- An actual electron micrograph of a murre feather is shown in "feather2.gif" (from Spearman and Hardy 1985). (talkorigins.org)
- Under the extreme magnification of an electron microscope, Zhang looked at the filaments of the dinosaurs Sinosauropteryx and Sinornithosaurus , as well as the true feathers of the early bird Confuciusornis . (scienceblogs.com)
- Rinse the utensil thoroughly and brush the feathers with just water to remove any residue. (ehow.com)
- Leave them in until they reach the desired shade, then take the feathers out of the color bath and rinse them out. (wikihow.com)
- A small amount of color will come out when you rinse the feathers, so let them soak until they are a shade darker than desired. (wikihow.com)
- Rinse the feathers with cool water. (wikihow.com)