oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 156 )

2018 ( 326 )

2017 ( 339 )

2016 ( 366 )

Custom range...

Search Results: 1 - 10 of 182969 matches for " Leandro Henrique de Sousa;Correia "
All listed articles are free for downloading (OA Articles)
Page 1 /182969
Display every page Item
Angiografia rotacional com reconstru??o tridimensional (3D-RA) como ferramenta diagnóstica em pacientes com estenose da artéria do rim transplantado
Souza, Rodrigo Almeida;Barbosa, Adriano Henrique Pereira;Pimentel, Leandro Caetano;Furini, Fábio Rodrigo;Sousa, José Marconi de Almeida;Pestana, José Osmar Medina;Lima, Valter Correia de;
Revista Brasileira de Cardiologia Invasiva , 2011, DOI: 10.1590/S2179-83972011000100014
Abstract: background: transplant renal artery stenosis (tras) is the major vascular complication associated to adverse events in patients with kidney grafts, whose incidence ranges from 1% to 23%. angiography is the gold-standard for diagnosis, enabling immediate treatment; however, due to the variable anatomy and location of anastomosis, additional projections are often required, leading to greater exposure to contrast medium and radiation. tridimensional rotational angiography (3d-ra) appears as a tool for diagnosis and treatment of tras. the aim of this paper was to evaluate the accuracy of measurements obtained by 3d-ra in comparison to conventional angiography. methods: from april, 2010 to january, 2011, 41 3d-ras were performed in patients with clinical suspicion of tras. images were analyzed by independent observers; conventional angiography measurements were obtained online and 3d-ra measurements were obtained offline with the philips allure 3d-ra software. results: thirty-five 3d-ras (84%) were considered adequate for angiographic measurements, and 20% provided additional and relevant information for the therapeutic strategy. there was no statistically significant difference between measurements obtained from the reference diameter and minimal luminal diameter of the artery using 3d-ra and conventional angiography. in addition, there was a strong correlation between them conclusions: 3d-ra comes up as a useful tool for tras diagnosis, providing accurate measurements and complementary and relevant information for the diagnosis and treatment, in addition to potentially reducing procedure time and exposure to contrast and radiation.
Decomposi??o e libera??o de nutrientes de resíduos culturais de crambe e nabo forrageiro
Heinz, Rafael;Garbiate, Marcos Vinicios;Viegas Neto, Antonio Luiz;Mota, Leandro Henrique de Sousa;Correia, Allan Michel Pereira;Vitorino, Antonio Carlos Tadeu;
Ciência Rural , 2011, DOI: 10.1590/S0103-84782011000900010
Abstract: this study aimed to evaluate the decomposition and nutrient release from crop residues of fodder radish and crambe in the implementation of no-tillage system. the experiment was conducted in a distroferric red latossol with 762g kg-1 of clay. the experimental design was randomized blocks with four replications. the treatments were applied in split plots, considering the species of cover crops (radish and crambe) as the main plots and harvest dates of decomposition bags (0, 15, 30, 45, 60, 75 days after management) as subplots. the cover crops were treated 60 days after management, in full bloom. radish presented a dry mass production of 5586kg ha-1 and crambe of 2688kg ha-1. the kinetics of residue decomposition had a behavior similar to the dynamics of nutrient release, with an initial rapid phase followed by a slower one. the k, p and mg are released more quickly for subsequent crops. the increased speed of nutrients release by crops occurred around 15 days after the biomass management.
Effect of temperature and pre-germination treatments on seed germination and seedling vigor of Jatropha curcas L
Leandro Henrique de Sousa Mota,Rafael Heinz,Marcos Vinicios Garbiate,Silvana de Paula Quint?o Scalon
Biotemas , 2012,
Abstract: To date, there are no official methods used to test the seed germination of physic nut (Jatropha curcas) and there have only been a few attempts to optimize the germination of this species. The objective of this study was to evaluate the effect of different temperatures and pre-germination treatments on the germination and seedling vigor of J. curcas. The treatments were arranged in a completely randomized factorial scheme with four temperatures (20, 25, 30 and 20-30°C) x two types of seeds (with and without the seed tegument) x six periods of water imbibition (0, 6, 12, 18, 24 and 30h). The seeds were sown using a roller system with four replications of 50 seeds for each treatment. The germination percentage was higher for seeds stored at 25°C, when the seed tegument was maintained. When the time of water imbibition was increased, the germination percentage decreased, as well as the index of germination velocity and the percentage of germination of the first count. Imbibition for up to 12h led to an increase in hypocotyl growth. For this species, the maximum germination potential and highest vigor were obtained at 25°C, for seeds with teguments that were maintained and were not submitted to water imbibition.
Avalia o de Modelos Digitais de Eleva o para Estudos Geoecológicos no Maci o da Pedra Branca, Rio de Janeiro, Brasil.
Leandro Gomes Souza,Gustavo Mota de Sousa,Pedro Henrique Ferreira Coura,Manoel do Couto Fernandes
Anuário do Instituto de Geociências , 2009,
Abstract: Geoprocessing tools have been increasingly used to support the integrated study of geoecological variables, once they allow fast and efficient analysis. One of the products generated by geoprocessing of great importance do analysis that considerate the real surface of the terrain is the Digital Elevation Model (DEM). The consideration of the real surface is essential for the correct calculation of volumes, areas and distances, parameters of great importance for geomorfological indicators. There are many kinds of methods to generate this models and no consensus about which method has the best results, once it’s precision will depend on characteristics of the study area. This work aims to compare the different DEM generation methods for irregular relief areas, using the Pedra Branca massif, RJ, as study area. It has been generated DEMs by two different interpolation methods and grids: one based in rectangular regular grid (TOPOGRID) and the interpolation method of Delaunay constrained, based in triangular irregular network (TIN), both generated in the software ArcGIS 9.2. For the verification of the quality and altimetric precision of these models, it has been utilized a map of declivities generated from the triangular irregular network model. Results show that the more adequate method for the study area is the TOPOGRID. However, it has been noted that this behavior is unequally distributed along its declivities classes, and it’s errors are bigger in the great declivities, where the TIN model has been more efficient.
Germina??o de sementes de Stryphnodendron Mart. osmocondicionadas
Kissmann, Camila;Scalon, Silvana de Paula Quint?o;Mota, Leandro Henrique de Sousa;Vieira, Maria do Carmo;
Revista Brasileira de Sementes , 2010, DOI: 10.1590/S0101-31222010000200003
Abstract: the objective of this study was to evaluate the germination of seeds of three species of stryphnodendron mart. (stryphnodendron adstringens (mart.) coville, s. obovatum benth. and s. polyphyllum mart.) under priming in different osmotic agents, in osmotic potentials of -1.0 mpa and -0.5 mpa. seeds scarified in concentrated sulphuric acid for 40 minutes were conditioned in the following treatments: 1) peg 6000; 2) peg 6000 + kno3, in equal parts; 3) kno3; 4) water and 5) control. afterwards, they were incubated in a germination chamber (bod type) at a temperature of 20 oc (± 2 oc) during 0 h (control), 6 h, 12 h and 24 hours, under continuous light. for each species, the experiment was carried out in a completely randomized factorial with 5 (priming treatments) x 4 (priming time) factors and four repetitions of 20 seeds. the percentage of germination, germination speed index, length of root and aerial parts, and fresh and dry mass of seedlings obtained from seeds conditioned in -1.0 mpa osmotic potential and the %g and igs of those conditioned at -0.5 mpa, were evaluated. priming in the potential of -1.0 mpa did not significantly influence the physiological performance of stryphnodendron obovatum and s. polyphyllum seeds but the development of s. adstringens seeds was adversely affected. priming of s. adstringens and s. polyphyllum seeds in potential of -0.5mpa results in higher percentage germination and germination speed index.
Germina??o e crescimento de Caesalpinia ferrea mart. Ex tul. Em diferentes substratos
Scalon, Silvana de Paula Quintao;Teodósio, Tiara Kesli Conticelli;Novelino, José Oscar;Kissmann, Camila;Mota, Leandro Henrique de Sousa;
Revista árvore , 2011, DOI: 10.1590/S0100-67622011000400007
Abstract: seedlings production of native species for commercial planting and for recovery of degraded areas leads to an increasing seeking for technologies that reduce costs to establish native species, as for example alternative substratum. the objective of this work was to provide better emergency of seeds and initial growth of seedlings of caesalpinia ferrea mart. ex tul. plants, therefore it was tested different types of substrates, using dystroferric red latosol, clay texture - c, mixed with sand - s (0.5 dm3 of land / 0.5 dm3 of sand), adding organic fertilizer (of) organosuper? and chemical fertilizer (cf) yoorin? at different ratios, constituting the following substrates: 1) c+s (control); 2) c+s+of (9.86 g dm-3); 3) c+s+of (14.69 g dm-3); 4) c+s+of (19.46 g dm-3), 5) s+c+cf (8.4 g dm-3). the composition earth + sand + 19.46 g dm-3 of the organic fertilizer provided better emergence of seedlings and greater emergence speed index of wood-iron seedlings, presenting values of 60.4 and 0.330, respectively. chemical fertilization increased the production of fresh and dry mass of seedlings, with values of 399.9mg and 169.8respectively, with means which did not significantly differ from the highest dose of organic fertilization.
Instala o de um Sistema de Drenagem Subterranea em um Solo Salino-Sódico Cultivado com Coco em Pentecoste - Ceará
Carlos. Henrique. Carvalho de Sousa,Francisco Leandro Barbosa da Silva,Claudivan Feitosa de Lacerda,Raimundo Nonato Távora Costa
Revista Brasileira de Agricultura Irrigada , 2011, DOI: 10.7127/rbai.v5n100041
Abstract: O trabalho foi desenvolvido no Perímetro Irrigado Curu-Pentecoste, em Pentecoste, Ceará, Brasil, com o objetivo de instalar um sistema de drenagem subterranea para auxiliar na recupera o de um solo salino-sódico em uma área cultivada com coco (Cocus nucífera L). O sistema de drenagem foi instalado em uma área com sérios problemas de alagamento e constituiu-se de: dreno coletor aberto com 135 m, dez drenos laterais de 45 m, compostos por tubos drenoflex DN 65 mm, manta bidim OP-20 e uma caixa de brita n° 01. Para acompanhar a resposta do coqueiro à instala o do sistema de drenagem, 35 dias após a instala o foram avaliados, a circunferência do coleto, altura da planta; número de folhas vivas; número de folhas emitidas, comprimento da folha 3, comprimento do pecíolo na folha 3. Uma segunda avalia o realizada oito meses após a primeira. Plantas que na primeira observa o altura média de 149 cm, passaram a medir até 272 cm, acréscimos de cerca de 80%, enquanto as plantas que permaneceram fora da área os acréscimos foram em torno de 50%. Ao final podese concluir que a instala o do sistema de drenagem proporcionou melhor escoamento do excedente de água da área e consequentemente propiciou o melhor desenvolvimento das plantas de coqueiro.
Níveis de energia na alimenta??o de cordeiros em confinamento e composi??o regional e tecidual das carca?as
Piola Junior, Walter;Ribeiro, Edson Luis de Azambuja;Mizubuti, Ivone Yurika;Silva, Leandro das Dores Ferreira da;Sousa, Cícero Leandro de;Paiva, Fernando Henrique Pereira de;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000900023
Abstract: the objective of this study was to evaluate quantitative characteristics and carcass regional and tissue composition of lambs submitted to different energy levels (2.23, 2.54 and 2.85 mcal me/kg dm) in the diet and slaughtered with 32.2 ± 3.8 kg body weight and at average age of 145.6 ± 20.1 days. the diets were isoproteic (16.70% cp) and fed to 18 no castrated crossbred texel male lambs. the lambs were confined in individual pens, in a slotted floor sheep barn. the half left-side carcasses were splitted into the shoulder, leg, loin, ribs and neck. the tissue composition (bone, muscle and fat) was also evaluated in each cut. except for loin percentage, energy levels presented a quadratic effect on the other cuts. the percentages of shoulder and neck were greatest at the middle energy level and the percentages of leg and ribs were lowest at this level. the energy level of the diet influenced the distribution of the cuts in the carcass, but it did not affect the average tissue composition of the carcass. the shoulder was the cut with the greatest tissue variation. the different cuts can be used to predict the average tissue composition of the carcass but the shoulder is the least indicated.
Sele??o de progênies de meio-irm?os de milho para eficiência no uso de nitrogênio
Heinz, Rafael;Mota, Leandro Henrique de Sousa;Gon?alves, Manoel Carlos;Viegas Neto, Antonio Luiz;Carlesso, André;
Revista Ciência Agron?mica , 2012, DOI: 10.1590/S1806-66902012000400015
Abstract: the study aimed to estimate the parameters and the genetic gain in selection of half-sib for nitrogen use efficiency, through simultaneous selection of characters. two experiments were established, differentiated by nitrogen fertilization, one with proper fertilization (high n) and another in stress conditions (low n). the experiment was using a 10x10 lattice with two replications. in the tests we used 84 different half-sib and 16 witnesses. from the mean squares of analysis of variance in each environment were the estimates of genetic parameters. after the analysis were selected in each environment 17 different half-brothers, through the classical index selection, and verified the repeatability of the progeny in both environments. observed variability among progenies, determining the potential for population screening for nitrogen use efficiency. the parameter estimates and genetic gains were higher in high n the use of selection index promoted estimates of selection gain of 24.43 and 21.05% for high and low n, respectively, for grain yield. the progenies showed average yield of 13.45 and 19.47% higher than control in high and low n, respectively.
Estabilidade dos carotenoides,antocianinas e vitamina C presentes no suco tropical de acerola (Malpighia emarginata DC.) ado?ado envasado pelos processos Hot-Fill e asséptico
Freitas, Claisa Andréa Silva de;Maia, Geraldo Arraes;Costa, José Maria Correia da;Figueiredo, Raimundo Wilane de;Sousa, Paulo Henrique Machado de;Fernandes, Aline Gurgel;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000500018
Abstract: tropical fruits are widely accepted by consumers, and important sources of antioxidant compounds. acerola, known to have high vitamin c levels, is also rich in anthocyanins and carotenoids. the purpose of this work was to evaluate the stability of the total carotenoids, total anthocyanins and ascorbic acid of the acerola sweetened tropical juice produced by the hot fill (glass bottles) and aseptic (packings carton) process during 350 days of storage in similar conditions of trade (28oc ± 2oc). it was observed that there were not losses of total anthocyanins for the process hot fill, however for the aseptic process a reduction of 86.89% of the initial values was observed. the values of total corotenoids stayed unaffected in the samples of the aseptic process, while in the one of the hot fill there was a reduction of 12.5%. a reduction in the values of ascorbic acid of 23.61% was observed for the hot fill process and 35.95% for the aseptic process.
Page 1 /182969
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.