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| Registros recuperados: 20 | |
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| Anicua Sánchez, Rosa. |
| La producción de cultivos en maceta está relacionada con la selección de sustratos, que se basa en las propiedades físicas y en particular con el tamaño y la distribución de partículas, que determinan la retención y el movimiento de agua. Por lo que, el objetivo del presente trabajo fue la caracterización de materiales orgánicos e inorgánicos a partir de las propiedades físicas y micromorfológicas para la generación de mezclas en la producción de Lisianthus. Se realizó la caracterización de sustratos orgánicos (fibra de coco, peat moss, composta y vermicomposta) e inorgánicos (tezontle, piedra pómez, perlita y zeolita); con base en las propiedades físicas como densidad aparente (DA) y densidad real (DR) (Ansorena, 1994); espacio poroso total (EPT),... |
| Tipo: Tesis |
Palavras-chave: Sustratos; Curva de retención de humedad; Porosidad; Lisianthus; Micromorfología; Growing media; Waterrelease curve; Porosity; Lisianthus; Micromorphology. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1408 |
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| Oliveira Junior,Jairo Calderari de; Chiapini,Mariane; Nascimento,Alexandre Ferreira do; Couto,Eduardo Guimarães; Beirigo,Raphael Moreira; Vidal-Torrado,Pablo. |
| ABSTRACT The simultaneous occurrence of high levels of exchangeable sodium percentage (ESP) and alkalinity in soils imposes restrictions on plant development and affects physical properties such as porosity, bulk density, permeability, and hydraulic conductivity. Although sodic soils are frequent in the flood plain of the São Lourenço River, northern Pantanal, Brazil, few studies focus on their formation and classification, especially with regard to specific processes and detailed classification into lower categorical levels by the different systems available. The aim of this study was to identify the predominant pedogenetic processes occurring in sodic soils of the flood plain of the São Lourenço River to understand their genesis and assess how taxonomic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Planossolo; Luvissolo; Argilluviation; Ferrolysis; Micromorphology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100313 |
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| Mateus,Ana Carolina Campos; Oliveira,Fábio Soares de; Varajão,Angélica Fortes Drummond Chicarino; Soares,Caroline Cibele Vieira. |
| ABSTRACT Pedological studies using X-ray diffraction (XRD), X-ray fluorescence (XRF), optical microscopy, and scanning electron microscopy (SEM-EDS) showed a Xanthic Ferralsol formed from the degradation of bauxite on a slope in the Caparaó region, in southeastern Brazil. We found a decrease in the number and size of bauxite fragments toward the top of the profiles, bauxite fragments that were more degraded at the top of the profiles, transformation of gibbsite into kaolinite, and absolute enrichment in silicon in the mass balance. These indicators suggest that resilication could be the major process responsible for formation of the soil; detailed studies are needed to verify the origin of the silica. The reintroduction of silica into the system occurs by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedogenesis; Ferralsol; Kaolinite; Micromorphology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100314 |
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| Vargas,Carlos Henrry Bellot; Almeida,Armando Antunes de. |
| The identification of insect fragments showed that the infestation was done, mainly, by Coleoptera of the genus Sitophilus Schnherr, 1838 (Curculionidae) and Rhizoperthadominica (Fabricius, 1792) (Bostrychidae), that are caracteristic of internai infestation, and in lesser percentage by insects charac-teristic of externai infestation, as Crylolestes spp. (Cucujidae), Tribolium spp. (Tene-brionidae), Oryzaephilussurinamensis(Linnacus, 1758) (Cucujidae) and Lasioderma serricorne (Fabricius, 1792) (Anobiidae). From the total of recovered and identified insect fragments, 59% were fragments of elytra, 23% of mandibles, and in minor percentage by tarsal segments, claws, tibial spurs, legs, tarsus, eyes, antennae, exuviae and larvae urogomphi. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insect fragments; Food; Identification; Micromorphology. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000300021 |
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| Lima,Renata Gabriela Vila Nova de; Lima,Liliane Ferreira; Ferreira,Angélica Cândida; Araújo,Josiane Silva; Zickel,Carmen Silvia. |
| Abstract: Diploon is a monospecific genus represented by Diploon cuspidatum, an arboreal species that has morphological characteristics distinct from those of other Sapotaceae species. In this study, Diploon cuspidatum leaves were characterized morphoanatomically in order to reveal additional diagnostic characters of their external morphology of the genus. The Diploon petiole presents shape and arrangement of the vascular system flat-convex, occasionally with one or two accessory bundles, many laticifers, and many prismatic crystals. The midrib is biconvex with a U-shaped cuticle on the abaxial side, and laticifers are associated with the vascular tissues. Mesophyll is dorsiventral, palisade parenchyma has two cell layers, T- and Y-shaped malpighiaceous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf anatomy; Leaf architecture; Micromorphology; Taxonomy; Chrysophylloideae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100202 |
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| Carballo, José Luis; Hajdu, Eduardo. |
| Two new species of Mycale with micracanthoxeas are described: Mycale (Aegogropila) lilianae n. sp., mainly characterized by the presence of toxas as large as 300 µm, and Mycale (Carmia) urizae n. sp., the first Mycale with micracanthoxeas described from Africa, characterized by the presence of anisochelae-III with the falx projecting downwards from the middle basal portion of the frontal alae of the head, and by the presence of two morphologically distinct size classes of toxas, with toxas-II being notably oxea-shaped. A discussion of all species of Mycale with micracanthoxeas is included. It is postulated that a comprehensive assessment of the distribution of this character, as well as of other micromorphological features of Mycale spicules, may shed... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Poecilosclerida; Mycalidae; Mycale; Taxonomy; Micromorphology; Phylogeny; Microscleres; Scanning electron microscopy. |
| Ano: 1998 |
URL: http://www.repository.naturalis.nl/record/534412 |
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| Paniagua-Ibánez,Maribel; López-Caamal,Alfredo; Mussali-Galante,Patricia; Sánchez-Salinas,Enrique; Ortiz-Hernández,Ma. Laura; Ramírez-Rodríguez,Rolando; Tovar-Sánchez,Efraín. |
| BACKGROUND: Morphological variability can lead to serious taxonomic problems in species with wide distribution ranges. Although morphological variability is partly due to ontogenetic programming, abiotic variables can also exert a significant effect on micro- and macromorphological characters. in this paper, we studied the morphological variability (43 characters) of Cosmos bipinnatus associated to different vegetation types in central Mexico. We searched for significant correlations between the overall morphology of C. bipinnatus and abiotic variables such as altitude and soil parameters (pH, organic matter content, NH4,NO3,PO4, total N and total P content). We also analyzed the Simplified Relative Distance Plasticity index (RDPIs). RESULTS: Locality had... |
| Tipo: Journal article |
Palavras-chave: Macromorphology; Micromorphology; Phenotype; Phenotypic plasticity reproductive character; Vegetative character. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100014 |
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| Griggs, Adam J.; Davies, Siwan M.; Abbott, Peter M.; Rasmussen, Tine L.; Palmer, Adrian P.. |
| Tephrochronology is central to the INTIMATE(1) goals for testing the degree of climatic synchroneity during abrupt climatic events that punctuated the last glacial period. Since their identification in North Atlantic marine sequences, the Faroe Marine Ash Zone II (FMAZ II), FMAZ III and FMAZ IV have received considerable attention due to their potential for high-precision synchronisation with the Greenland ice-cores. In order to optimise the use of these horizons as isochronous markers, a detailed re-investigation of their geochemical composition, sedimentology and the processes that deposited each ash zone is presented. Shard concentration profiles, geochemical homogeneity and micro-sedimentological structures are investigated for each ash zone preserved... |
| Tipo: Text |
Palavras-chave: North Atlantic; Tephra; Taphonomy; Synchronisation; Micromorphology. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00496/60734/65220.pdf |
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| Pinheiro Junior,Carlos Roberto; Pereira,Marcos Gervasio; Fontana,Ademir; Luz,Lucia Raquel Queiroz Pereira da; Corrêa Neto,Thaís de Andrade. |
| ABSTRACT The Borborema Plateau is characterized by different stages of relief evolution, which modify the climate and vegetation, and where high-altitude tropical forests can be seen surrounded by caatinga. The aim of this study was to characterize the soils of a topo-climosequence in the Agreste region of the State of Pernambuco, and evaluate the influence of the relief and climate on the pedogenesis. A topo-climosequence was selected, and trenches were opened in the geomorphological features of high-altitude forest (P1), between forest and pediplane (P2) and on a pediplanation surface (P3 and P4). A morphological description and a physical, chemical and micromorphological characterization were carried out. In general, the soils are sandy, with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Relief; Micromorphology; Sandy soils. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200177 |
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| Pires,Luiz F.; Reichardt,Klaus; Cooper,Miguel; Cássaro,Fabio A.M.; Dias,Nivea M.P.; Bacchi,Osny O.S.. |
| Soil pore structure characterization using 2-D image analysis constitutes a simple method to obtain essential information related to soil porosity and pore size distribution (PSD). Such information is important to infer on soil quality, which is related to soil structure and transport processes inside the soil. Most of the time soils are submitted to wetting and drying cycles (W-D), which can cause important changes in soils with damaged structures. This report uses 2-D image analysis to evaluate possible modifications induced by W-D cycles on the structure of damaged soil samples. Samples of three tropical soils (Geric Ferralsol, GF; Eutric Nitosol, EN; and Rhodic Ferralsol, RF) were submitted to three treatments: 0WD, the control treatment in which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil bulk density; Soil water content; Soil porosity; Micromorphology; Soil structure; Compaction. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100016 |
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| Duarte,Tarcísio de Souza; Lessa,Gisele. |
| ABSTRACT The cuticle is the outermost of the three cellular layers of the mammalian hair. It comprises numerous keratinized scales, whose morphology, combined with other microscopic characteristics of the hair, confers characteristic signature traits to various different species. This study aimed to analyze whether the cuticular patterns of the aristiform hair had any signature implications for the two species of the genus Abrawayaomys Cunha & Cruz, 1979. We identified the cuticular profiles of A. ruschi and A. chebezi. Both species have similar hair pattern. The base of the hair shows "irregular waved" scales with smooth and continuous edges, and the apex showed "transversal waved" small-sized scales with continuous and ornamented edges. The middle... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Micromorphology; Sigmodontinae; Spines; Taxonomy; Tricology. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000400321 |
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| Registros recuperados: 20 | |
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