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Registros recuperados: 5
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A first evaluation on the use of Ardea albus feathers as bioindicators of mercury burden in Amazonian ecosystems Acta Amazonica
Gomes,Andreza Lourdes; Vieira,José Luiz Fernandes; Pinheiro,Maria da Conceição Nascimento; Marceliano,Maria Luiza Videira.
We evaluated in this study the total mercury concentration in feathers of Ardea albus collected in a colony located in the city of Belem-PA, Brazil in a prospective trial for its use as bioindicators of mercury burden in Amazonia ecosystems. An Atomic absorption spectrophotometry with gold amalgamation was used for the metal determination. The total mercury average concentration in body feathers was 2.2 ± 1.5 µg.g-1 and 1.3 ± 0.9 µg.g-1 in wing feathers. No correlation was observed between total mercury concentration and the length of body or wing feathers. Total mercury concentration was above 5 µg.g-1 dry weight in only one body feather sample.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mercury; Ardea albus; Birds; Feathers; Environmental.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000400025
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New evidence of feathers in the Crato Formation supporting a reappraisal on the presence of Aves Anais da ABC (AABC)
Sayão,Juliana M.; Saraiva,Antonio A.F.; Uejima,Angelica M.K..
The preservation of delicate structures such as feathers is very rare in the paleontological record, due to the fragility of their components. Fossil feathers have been reported from approximately 50 deposits around the world, from the Late Jurassic to the Pleistocene. In Brazil initial findings consisted of a primary feather of a large bird found in the Tremembé Formation. Other occurrences are preserved in the Crato Formation, where several symmetrical and one single asymmetrical feather was found. Based on three new specimens and reassessing further feather occurrences we cannot confirm the presence of volant Aves in this deposit. The presence of an asymmetrical feather without barbules and hooks hints at the previous existence of a flightless animal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Crato Formation; Cretaceous; Feathers; Theropod.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100010
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Instrumentos para medição de neps e distribuição de comprimento de fibras de algodão: princípios e aplicações agronômicas. Infoteca-e
MORAIS, J. P. S.; MORELLO, C. de L.; MIZOGUCHI, E. T.; VIEIRA, S. DA C..
A mensuração das características de qualidade de fibra é importante na indústria têxtil para ter-se previsibilidade no processo de fiação. Por esta razão, fardos podem ser classificados utilizando-se aparelhos SITC (Standardized Instrument Testing of Cotton), e instrumentos como o AFIS® (Advanced Fiber Information System) e o aQura®. Esses últimos podem ser usados para a medição de propriedades das fibras de algodão na fita da fiação, sendo ferramentas importantes para um adequado controle de qualidade da matéria prima que entra nas linhas de produção.
Tipo: Folhetos Palavras-chave: Qualidade da fibra; Analysis method; Industrial technology; Algodão em pluma; Algodão; Fibra Vegetal; Controle de Qualidade; Pluma; Indústria Têxtil; Método de Análise; Tecnologia Industrial; Cotton; Fiber quality; Industrial crops; Textile products; Quality control; Feathers; Control methods; Analytical methods.
Ano: 2023 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1162012
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Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers International Journal of Morphology
Alibardi,Lorenzo.
The present ultrastructural study on developing and regenerating feathers of chick and zebrafinch describes the ultrastructural changes that occur during the differentiation of barb cells that leads to the formation of the ramus of barbs. Differently from barbule and barb cortical cells that accumulate feather keratin, barb medullary cells undergo to lipid degeneration. Eventually, lipids disappear and medullary cells become empty cavities in the central part of the ramus. In barb medullary cells feather keratin is accumulated in few peripheral bundles that merge with those of cortical cells to fom the wall of the ramus. The latter is joined with branching barbules. The process that controls the transition from keratin-synthesizing to lipid-producing barb...
Tipo: Journal article Palavras-chave: Feathers; Barbs; Differentiation; Lipidization; Ultrastructure.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000100010
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Diverse uses of feathers with emphasis on diagnosis of avian viral infections and vaccine virus monitoring Rev. Bras. Ciênc. Avic.
Davidson,I.
The large amounts of feathers produced by the poultry industry, that is considered as a waste was explored for possible uses in various industries, such as meals for animals, biofuels, biodegradable plastic materials, combating water pollution and more. That review mentions these uses, but concentrate on the utilization of feathers for the diagnosis of viral infections and for monitoring vaccine viruses in chickens after vaccination. The viral diseases in which diagnosis using nucleic acids extracted from the feather shafts was described are, Marek's disease virus, circoviruses, chicken anemia virus, fowlpox virus, avian retroviruses, avian influenza virus and infectious laryngotracheitis virus. In two cases, of Marek's disease virus and of infectious...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avian influenza virus; Avian retroviruses; Infectious laryngotracheitis virus; Circoviruses; Chicken; Chicken anemia virus; Diagnosis of avian viral diseases; Environmental monitoring; Feathers; Fowlpox virus; Marek's disease virus; Malformation of chick feathering; Stability of DNA viruses; Usage of feathers.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000300001
Registros recuperados: 5
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