Consulta: subjectFacets:"Micromorphology"
Registros recuperados: 20
Data/hora: 03/06/2024 11:00:13

Propiedades hídricas de mezclas de sustratos con diferentes proporciones y tamaños de particula
Provedor de dados: 32
Autores: Hernández Escobar, Jorge Luis.
Se evaluaron las propiedades hídricas (retención de agua y capacidad de aire) de  mezclas de sustratos (fibra de coco: FC, piedra pómez: PP y tezontle: T) con  micromorfología de partículas y demanda hídrica de plantas de lechuga Var.  Summertime. Los factores de estudio fueron: tamaño de partícula (1-2 mm y 2-3.36  mm) y proporción de mezcla (0:100, 25:75, 50:50, 75:25 y 100:0, FC:T y FC:PP,  respectivamente). Se determinaron las curvas de retención de agua mediante el uso de  un equipo de succión con embudos de placa filtrante. Se realizaron láminas delgadas  de las mezclas de sustratos para evaluar la porosidad y la distribución de partículas.  Las mezclas con mejor retención de agua y capacidad de aireación se probaron en  plantas de lechuga bajo...
Tipo: Tesis
Palavras-chave: Fibra de coco; Tezontle; Piedra pómez; Micromorfología; Análisis de imágenes; Retención de agua; Maestría; Edafología; Coconut fiber; Pumice; Micromorphology; Image analysis; Water holding.
Ano: 2009
URL: http://hdl.handle.net/10521/1500

Relación carbono nitrógeno en el proceso de lombricompostaje y su potencial nutrimental en jitomate y menta.
Provedor de dados: 32
Autores: Romero Figueroa, José Cruz.
El objetivo del presente trabajo fue determinar el efecto de la relación carbono/nitrógeno (C/N) inicial de los materiales orgánicos a compostar sobre el monitoreo de los grados de descomposición y la calidad nutrimental del vermicompost, para la producción de jitomate y menta. La elaboración de los compost se utilizó paja de maíz (PM) y estiércol de bovino (E B), a los que se les determinó materia orgánica y nitrógeno total. Los cálculos se hicieron en base a las fórmulas propuestas por Comité Técnico de Normalización Nacional de Productos Agrícolas y Pecuarios (2007), la rel C/N de PM y EB fueron 90.84 y 26.32, respectivamente. La relación C/N de 45 se utilizó 670 kg y 1,330 kg: 35; 320 kg y 1,680 kg y rel C/N 26; 2,000 kg y 0 kg, de PM y EB...
Palavras-chave: Vermicompost; Micromorfología; Sustrato; Concentración nutrimental; Firmas espectrales; Micromorphology; Substratum; Nutrient concentration; Spectral signatures; Edafología; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2024

Caracterización física y micromorfología de materiales orgánicos e inorgánicos para la generación de mezclas de sustratos en la producción de lisiathus (Eustoma grandiflorum)
Provedor de dados: 32
Autores: 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

A influência da mineralogia na evolução micromorfológica do colapso em saprólito e latossolo.
Provedor de dados: 14
Autores: CARDOSO, F. B. da F.; MARTINS, E. de S.; CARVALHO, J. C. de.
Resumo: Este trabalho mostra a aplicação de técnicas modernas de micromorfologia e mineralogia no desenvolvimento de um modelo evolutivo do colapso em solos tropicais profundamento intemperizados. Abstract: This work exibition the application of modern techniques of micromorphology and mineralogy in the development of an evolutionary model of the collapse in deeply weathering tropical soils.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: ECOSOL170; Micromorfologia; Colapso; Micromorphology; Collapse; Soil testing.; Análise do Solo; Cerrado; Geoquímica; Mineralogia; Solo.; Geochemistry; Mineralogy; Soil.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567945

Optimising the use of marine tephrochronology in the North Atlantic: a detailed investigation of the Faroe Marine Ash Zones II, III and IV
Provedor de dados: 5
Autores: 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

Micromorphology in Mycale taxonomy (Mycalidae, Poecilosclerida, Demospongiae), with the description of two new micracanthoxea-bearing species
Provedor de dados: 16
Autores: 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

Influence of crust formation under natural rain on physical attributes of soils with different textures
Provedor de dados: 90
Autores: Castilho,Selene Cristina de Pierri; Cooper,Miguel; Juhász,Carlos Eduardo Pinto.
One of the main negative anthropic effects on soil is the formation of crusts, resulting in soil degradation. This process of physical origin reduces soil water infiltration, causing increased runoff and consequently soil losses, water erosion and/or soil degradation. The study and monitoring of soil crusts is important for soil management and conservation, mainly in tropical regions where research is insufficient to explain how soil crusts are formed and how they evolve. The purpose of this study was to monitor these processes on soils with different particle size distributions. Soil crusts on a sandy/sandy loam Argissolo Vermelho-Amarelo (Typic Hapludult), sandy loam Latossolo Vermelho-Amarelo (Typic Hapludox) and a clayey Nitossolo Vermelho eutroférrico...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Surface crusting; Soil roughness; Micromorphology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600006

Genesis of Soils from Bauxite in Southeastern Brazil: Resilication as a Soil-Forming Process
Provedor de dados: 90
Autores: 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

Genesis and Classification of Sodic Soils in the Northern Pantanal
Provedor de dados: 90
Autores: 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

The cuticular profile of the aristiform hair as a characteristic feature of Abrawayaomys (Rodentia: Cricetidae)
Provedor de dados: 103
Autores: 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 &amp; 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

Morphological variation of Cosmos bipinnatus (Asteraceae) and its relation to abiotic variables in central Mexico
Provedor de dados: 97
Autores: 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

Pedogenesis in a topo-climosequence in the Agreste region of Pernambuco
Provedor de dados: 124
Autores: 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

Origin of microaggregates in soils with ferralic horizons
Provedor de dados: 63
Autores: Cooper,Miguel; Vidal-Torrado,Pablo; Chaplot,Vincent.
Microaggregates that characterize ferralic soils have been hypothesized to have physical, geochemical and/or biological origins. Despite of many studies, the hierarchy between these processes that form microaggregates has seldom been reported. The objective of this work was to study the genesis of microaggregates in a sequence of Ferralic Nitisols developed on Quaternary red clayey sediments and diabase in Piracicaba (SP), Brazil. This issue was tackled by combining optical microscopy, image analysis, scanning electron microscopy and elemental iron quantifications by X-ray fluorescence. Micromorphological investigations showed three different types of microaggregates: (i) oval microaggregates with well sorted quartz grains in their interior; (ii) oval...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitisol; Soil genesis; Micromorphology; Scanning electron microscopy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300009

Identificação dos insetos infestantes de alimentos através da micromorfologia de seus fragmentos
Provedor de dados: 104
Autores: 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 Sch›nherr, 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

Comparative anatomy of calyx and foliar glands of Banisteriopsis C. B. Rob. (Malpighiaceae)
Provedor de dados: 39
Autores: Araújo,Josiane Silva; Meira,Renata Maria Strozi Alves.
Banisteriopsis is considered one of the largest genera of Malpighiaceae with 58 species, of which 47 occur in Brazil. The typical calyx and leaf glands of Banisteriopsis are considered relevant to the adaptive success of Malpighiaceae. Comparative studies of anatomical and histochemical characteristics may reveal similarities and assist in the interpretation of the functions performed by such glands. The present study aimed to describe the anatomy of the calyx and leaf glands of 38 species ofBanisteriopsis that occur in Brazil, and to analyze these structures histochemically in B. campestris, B. laevifolia and B malifolia, using standard methods. Calyx glands differ from leaf glands by possessing an irregular surface that is covered by a thick cuticle that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Banisteriopsis; Calyx glands; Histochemistry; Leaf glands; Lipids; Micromorphology; Polysaccharides; Protein.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100112

Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry &amp;amp; Cordeiro (Euphorbiaceae)
Provedor de dados: 39
Autores: Souza,Lidian Ribeiro de; Santos,Francisco de Assis Ribeiro dos; Carneiro-Torres,Daniela Santos.
ABSTRACT The present study aimed to morphologically characterize the pollen grains of species of Brasiliocroton mamoninha and B. muricatus in order to expand palynological knowledge of the group and provide additional micromorphological information useful for studies of the relationships within Crotoneae. Polleniferous material was acetolysed and described using light, scanning electron and transmission microscopy. The pollen grains of the two species of Brasiliocroton were apolar, spherical, inaperaturate and medium-sized with a Croton ornamentation pattern. The Croton pattern of B. mamoninha is formed by subtriangular pila, &gt;5-plicate with pointed apices, while for B. muricatus it is formed by subcircular to circular pila, &lt;5-plicate with rounded...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Croton pattern; Crotoneae; Micromorphology; Palynotaxonomy; Pollen grains.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300584

Sedimentation and pedogenic features in a clay deposit in Quadrilátero Ferrífero, Minas Gerais, Brazil
Provedor de dados: 42
Autores: Santos,Maria-do-Carmo; Varajão,Angélica F.D.C.
The clay deposit of Caxambu Hill occurs in a NW/SE oriented graben originated by syntectonic sedimentation during Cenozoic. Four facies were identified (fragmentary, nodular, massive and friable) and their differentiation is related to gravity mass-flow processes. The fragmentary facies is composed of extraclast fragments of the local Paleoproterozoic basement and sand size quartz-grains dispersed in a kaolinite-muscovite-goethitehematite matrix. The nodular facies is constituted by lithorelictal and pedorelictal nodules dispersed in a similar matrix as in the fragmentary facies. The massive facies is characterized by quartz grains dispersed in a kaolinite, hematite and goethite matrix with minor amounts of muscovite. The friable facies differs from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Kaolinite; Lithofacies; Micromorphology; Gravity mass flow; Chemical weathering.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100013

Pore system changes of damaged Brazilian oxisols and nitosols induced by wet-dry cycles as seen in 2-D micromorphologic image analysis
Provedor de dados: 42
Autores: 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

Leaf Morphoanatomy of Diploon Cronquist (Sapotaceae Juss.)
Provedor de dados: 49
Autores: 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

X-ray Microtomography to Quantify Morphological Sandstones Properties
Provedor de dados: 52
Autores: Pires,Luiz Fernando; Melo,Mário Sérgio de; Borges,Jaqueline Aparecida Ribaski; Heck,Richard John; Facin,Paulo Cesar.
Abstract The sandstones of the Furnas Formation in the State of Paraná, south of Brazil, are located in regions with great importance due to the natural heritage found in the rocky forms and associated flora and fauna. This paper presents a detailed analysis of the internal structure of diverse sandstones of the Furnas Formation. X-ray microtomography allowed 3D characterization of the number, pore size and shape distributions of the sandstones. Images with voxel size of 603 µm3 were utilized to evaluate the sandstone’s macroporosity. The main results obtained indicate that higher macroporosities were observed in coarser and some types of silicified sandstones. In general, fine sandstones were characterized by the largest number of pores. As a general...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image analysis; Porous system; Sandstone structure; 3D analysis; Micromorphology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100605