Morphological Variation
Mostrando 1-12 de 432 artigos, teses e dissertações.
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1. Tailoring the properties of Y2O3 via synthesis parameters varied during the PVA-assisted sol-gel route
Abstract The effect of synthesis parameters on the microstructural behavior and morphology during the yttrium oxide (Y2O3) formation is reported. Y2O3 crystals were produced by a modified sol-gel route assisted by polyvinyl alcohol solution varying the calcination temperature and solution pH. The crystalline phase formation was investigated using X-ray powde
Cerâmica. Publicado em: 2023
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2. Fruits of neotropical species of the tribe Malveae (Malvoideae - Malvaceae): macro- and micromorphology
ABSTRACT Fruit morphology of the tribe Malveae has been discussed since the first taxonomic classifications of Malvaceae. The fruits are schizocarps, with some genera possessing an endoglossum. Besides morphological variation in the endoglossum, other differences include the number seeds per locule and ornamentation of the exocarp. An in-depth study of the f
Acta Bot. Bras.. Publicado em: 2020-06
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3. Pollen types of Sapindaceae from Brazilian forest fragments: apertural variation
ABSTRACT Morphological variations in angiosperm pollen grains may aid in the differentiation of families, genera and species. Sapindaceae pollen morphology holds promise for the recognition of taxa of this cosmopolitan family, which is well distributed in tropical regions and possesses great morphological diversity. This study presents the pollen morphology
Acta Bot. Bras.. Publicado em: 2020-06
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4. Morphological characterization of pollen grains of Brazilian species of Bombacoideae (Malvaceae s.l.)
ABSTRACT The pollen grains of 15 species belonging to five genera (Ceiba Mill., Eriotheca Schott & Endl., Pachira Aubl., Pseudobombax Dugand, and Rhodognaphalopsis A. Robyns) of the subfamily Bombacoideae (Malvaceae s.l.) were acetolysed, measured, described and photomicrographed under light microscopy and scanning and transmission electron microscopy, in or
Acta Bot. Bras.. Publicado em: 2020-03
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5. Genome-Wide Assessment of Putative Superoxide Dismutases in Unicellular and Filamentous Cyanobacteria
Abstract Cyanobacteria are photoautotrophic prokaryotes capable to grow in diverse ecological habitats, originated 2.5-3.5 billion years ago and were first to produce oxygen. Since then superoxide dismutases (SOD) acquired great significance due to their ability to catalyze detoxification of byproducts of oxygenic photosynthesis i.e. superoxide radicals. In
Braz. arch. biol. technol.. Publicado em: 20/12/2019
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6. Naming structures and qualifying properties of anuran bioacoustical signals: a call for a homology-based nomenclature and equality for quantitative data
Abstract: There is a significant interest for using call features in taxonomic and systematic studies. However, the indiscriminate use of alternative terms for the acoustic structures has precluded reliable comparisons among species without directly checking recordings of all compared species. Recent attempts of nomenclature standardization have focused on t
An. Acad. Bras. Ciênc.. Publicado em: 28/11/2019
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7. Morphological and morphometric variations of Dicrocoelium rileyi (Digenea: Dicrocoelidae) parasitizing Tadarida brasiliensis (Chiroptera: Molosiidae) in Mexico
Abstract: Fifty-five adult Dicrocoelium rileyiMacy, 1931 parasitizing Tadarida brasiliensis (Geoffroy, 1824) from Durango, Nuevo Leon, Puebla, Zacatecas and Mexico State were morphologically described and morphometrically analyzed. To evaluate the degree of variation among populations from the five localities, 27 morphometric measures of this species were t
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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8. WOOD QUALITY OF Pinus patula Schltdl & Cham FOR THE PULP PRODUCTION
RESUMO O setor de polpa celulósica de fibra longa tem como base de suprimento as madeiras de Pinus taeda e P. elliottii e compete por essa matéria-prima com outros setores madeireiros. O estudo objetivou avaliar a qualidade da madeira de Pinus patula para a produção de polpa e papel. Árvores com 14 anos foram obtidas de um plantio localizado em Ponte Al
Rev. Árvore. Publicado em: 14/11/2019
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9. Morphological and postharvest treatments in Alpinia cultivars
Resumo A caracterização e avaliação morfológica de plantas são etapas imprescindíveis à classificação e a utilização do germoplasma para fins de melhoramento genético. Este estudo teve por objetivo ampliar os conhecimentos sobre a caracterização morfológica de quatro cultivares de Alpinia purpurata por meio de avaliações qualiquantitativas
Ornam. Hortic.. Publicado em: 28/10/2019
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10. Botulinum toxin as a treatment for short bowel syndrome in rats
Abstract Purpose: The denervation of the intestine with benzalkonium chloride (BAC) reduces mortality and improves weight gain in rats with short bowel syndrome (SBS). Nevertheless, translating these promising findings from bench to bedside is not feasible because BAC promotes peritonitis and irreversible denervation which may be followed by an uncontrolled
Acta Cir. Bras.. Publicado em: 16/09/2019
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11. Morphological variation of Aplectana hylambatis (Nematoda: Cosmocercidae) from different anuran hosts and localities in Argentina
Abstract: Aplectana hylambatis is a nematode with a wide geographic distribution and low host specificity. In spite of numerous reports, until this moment, the morphological variations between different hosts and localities have not been studied. We studied 401 specimens collected from five host species from seven localities in Argentina, and examined the fo
An. Acad. Bras. Ciênc.. Publicado em: 02/09/2019
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12. Description of a second known Liotyphlops caissara specimen (Serpentes: Anomalepididae)
Abstract: We recorded a second specimen of the poorly known insular blind snake Liotyphlops caissara. This new specimen expands the morphological variation of the number of dorsal scales in the genus Liotyphlops to 296 (vs. 304 in L. wilderi) and, considering the fact that the holotype of this species was destroyed, the present specimen represents the only a
An. Acad. Bras. Ciênc.. Publicado em: 19/08/2019