Scanning Electron Microscopes
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. A new species of Exogone Ørsted, 1845 (Annelida: Syllidae: Exogoninae) from Brazilian waters
Abstract We describe herein a new species of the abundant polychaete family Syllidae, Exogone brasiliensis sp. nov. The new species is characterized by a peculiar morphology of anterior body falcigers, with shafts and blades modified specially in chaetigers 1 and 2; falcigers until chaetiger 5 different from those of the rest of the body; and dorsal simple c
Pap. Avulsos Zool.. Publicado em: 21/10/2019
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2. Enhancement of Pitting Corrosion Resistance of Austenitic Stainless Steel Through Deposition of Amorphous/Nanocrystalline Oxy-nitrided Phases by Active Screen Plasma Treatment
In this research, AISI 304 austenitic stainless steels were efficient treatment using active screen plasma oxy-nitriding technique. The modified layers were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopes, and atomic force microscopy. In addition, the pitting corrosion resi
Mat. Res.. Publicado em: 29/10/2018
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3. Investigation of Mechanical and Metallurgical Properties of Friction Stir Corner Welded Dissimilar Thickness AA5086-AA6061 Aluminium Alloys
In this investigation, an attempt has been made to fabricate dissimilar thickness corner joint using non-heat treatable (AA5086) and heat treatable (AA6061) dissimilar aluminium alloys by friction stir welding process with plate thicknesses of 6mm and 4mm. Three parameters and three levels were considered to conduct the experiments such as welding and rotati
Mat. Res.. Publicado em: 11/06/2018
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4. Color electron microprobe cathodoluminescence of Bishunpur meteorite compared with the traditional optical microscopy method
Abstract Cathodoluminescence (CL) imaging is an outstanding method for sub classification of Unequilibrated Ordinary Chondrites (UOC) - petrological type 3. CL can be obtained by several electron beam apparatuses. The traditional method uses an electron gun coupled to an optical microscope (OM). Although many scanning electron microscopes (SEM) and electron
REM, Int. Eng. J.. Publicado em: 2018-04
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5. Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)
ABSTRACT The genus Oldenlandia (Rubiaceae) has a conflicting generic delimitation, with representatives that show different floral syndromes. Oldenlandia salzmannii is a marshy herb that is widespread in South America. It is heterostylous, specifically distylous, and self-compatible. Recent molecular phylogenetic studies found that this species forms a clade
Acta Bot. Bras.. Publicado em: 10/11/2016
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6. Immature stages of Hamadryas fornax fornax (Hübner) (Lepidoptera: Nymphalidae: Biblidinae)
ABSTRACT The external morphology and biology of the immature stages of Hamadryas fornax fornax (Hübner, [1823]) (Lepidoptera, Nymphalidae, Biblidinae) recorded on Dalechampia triphylla (Euphorbiaceae) in Curitiba, Paraná, Brazil are described. Morphological characters are illustrated and described, as a result of observations in scanning electron, stereosc
Rev. Bras. entomol.. Publicado em: 2015-12
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7. Ploidy level and obligate apogamy in two populations of Argyrochosma nivea var. tenera (Pteridaceae)
ABSTRACT Argyrochosma nivea var. tenera is a cheilanthoid fern from the American continent. We present herewith the study of meiotic behavior and gametic number as well as number of spores and reproduction mode (with observations from cultured gametophytes). The study material is from Northwestern Argentina. For the study of meiosis, sporangia were fixed in
Hoehnea. Publicado em: 2015-06
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8. Influência do peróxido de hidrogênio a 7,5% contendo cálcio, ACP, flúor e hidroxiapatita na microdureza, rugosidade superficial, alteração de cor e micromorfologia de esmalte humano / Influence of 7.5% hydrogen peroxide containing calcium, ACP, fluoride and hydroxyapatite on microhardness, surface roughness, color change and micromorphology of human enamel
O objetivo deste estudo in vitro foi determinar a microdureza, rugosidade superficial, micromorfologia e alterações de cor de esmalte dental humano submetido a tratamentos clareadores caseiros com peróxidos de hidrogênio a 7,5% (PH) adicionados de cálcio, fosfato de cálcio amorfo (ACP), flúor e/ou hidroxiapatita (HA). Três agentes de tratamento comer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/01/2012
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9. Morphological and morphometrical assessment of spermathecae of Aedes aegypti females
The vectorial capacity of Aedes aegypti is directly influenced by its high reproductive output. Nevertheless, females are restricted to a single mating event, sufficient to acquire enough sperm to fertilize a lifetime supply of eggs. How Ae. aegypti is able to maintain viable spermatozoa remains a mystery. Male spermatozoa are stored within either of two spe
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-09
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10. Anatomy and histochemistry of the vegetative organs of Cissus verticillata: a native medicinal plant of the Brazilian Amazon
The purpose of this paper was to carry out an anatomical and histochemical analysis of the vegetative organs of Cissus verticillata (L.) Nicolson & C.E. Jarvis, Vitaceae, to contribute for the attest the taxonomic identity of the medicinal plant. Samples from root, stem, leaf and tendril were cleared, dissociated and processed according to the usual methodol
Rev. bras. farmacogn.. Publicado em: 17/07/2012
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11. Características mecânicas de vergalhões de aço auto-revenido
The rebar steel is one of the most utilized and diffused materials in Brazilian civil construction, as it is in the whole world, but it´s necessary to know more details about the rebar behavior as a material and not only as a structural element. Each day civil engineering searches for new alternatives to maximize the use of materials, from new structural ca
Publicado em: 2009
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12. Contribution to the taxonomic knowledge of Terebellidae e Trichobranchidae (Annelida: Polychaeta) of southeastern-southern Brazil / Contribuição ao conhecimento taxonômico de Terebellidae e Trichobranchidae (Annelida: Polychaeta) da região Sudeste-Sul do Brasil
The present Dissertation is the result of a taxonomic survey on the species of polychaetes belonging to the families Terebellidae and Trichobranchidae collected by the projects "Biodiversity of Polychaetes on Rocky Shores along the coast off the State of São Paulo, Brazil", "Benthic Marine Biodiversity on the State of São Paulo", and "REVIZEE/South Score/B
Publicado em: 2008