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Search Results: 1 - 10 of 70820 matches for " Ant?nio Carlos Sequeira Fernandes "
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Composi??o molecular e origem paleobotanica de ambares da bacia do Araripe, Forma??o Santana
Pereira, Ricardo;Carvalho, Ismar de Souza;Fernandes, Antnio Carlos Sequeira;Azevedo, Débora de Almeida;
Química Nova , 2009, DOI: 10.1590/S0100-40422009000600032
Abstract: the terpenoid composition of seven amber samples from araripe basin (santana formation, crato member) has been analyzed by gas chromatography-mass spectrometry to determine their botanical origin. the diterpenoids, which have been identified in the fossil resin extracts are derived primarily from the abietane class, e.g., dehydroabietane, 4-epidehydroabietol, 16,17,18-trisnorabieta-8,11,13-triene, 7-oxo-16,17,19-trisnorabieta-8,11,13-trieno, dehydroabietic acid, ferruginol, hinokiol and hinokione. their composition is certainly typical for conifers, and angiosperms can be excluded as the botanical source, as no triterpene was identified. the terpenoid characteristics strongly support a relationship to the araucariaceae or podocarpaceae families. in addition, the fossil record of the embedding sediments (pollen and fossil leaves) also supports the proposal of these paleobotanical origins for the ambers.
Novas Ocorrências de mbar Provenientes da Bacia do Araripe (Forma o Santana, Membro Crato).
Ricardo Pereira,Ismar de Souza Carvalho,Débora de Almeida Azevedo,Antnio Carlos Sequeira Fernandes
Anuário do Instituto de Geociências , 2007,
Abstract: O ambar é uma resina fóssil originada devegetais superiores, tanto gimnospermas quantoangiospermas. A análise de sua composi o molecularpermite que se determine a origem botanica domesmo, também apresentando importancia pela suaextraordinária capacidade de preserva o de inclus esorganicas, tais como insetos, pequenos vertebrados erestos vegetais. No Brasil, a Bacia do Araripe constituia bacia sedimentar mais prolífica em ambar, tendosido relatadas diversas ocorrências. Esses registross o todos provenientes do Membro Crato, Forma oSantana (Cretáceo Inferior, Aptiano), consistindosempre em gotas de material resinoso imersos emcamadas de calcário laminado. A análise químicade algumas dessas amostras indicou a famíliaAraucariaceae como a possível fonte botanica dessesambares. Na localidade de Nova Olinda, CE, foramencontrados três fragmentos de material resinosocom aspecto vítreo amarelado e diametro médiode 1 cm, constituindo um novo registro de ambarno Brasil. Os fragmentos encontram-se imersosem placas de calcário laminado, típico do MembroCrato. A superfície dos mesmos apresenta aspectotrincado, com morfologia semelhante a um padr ode fratura do tipo conchoidal. Seus eixos maioresencontram-se paralelos aos planos de estratifica odo sedimento, estando deformados nesse sentidoprovavelmente devido à compress o litostática. Nomomento, esses ambares est o sendo analisados porCromatografia Gasosa acoplada à Espectrometriade Massas para caracteriza o da composi omolecular e conseqüente estabelecimento da origembotanica dos mesmos.
Utiliza??o da percep??o subjectiva do esfor?o para Monitoriza??o da Intensidade do Treino de For?a em Idosos
Costa,António; Fernandes,Carlos;
Motricidade , 2007,
Abstract: the rating of perceived exertion (rpe) is a valid and reliable method in monitoring intensities during aerobic training. however its validity and reliability is not clear in the classification of resistance training intensity. the purpose of this study is to evaluate the reliability and validity of rpe scale in monitoring the resistance training session in elderly. seventeen subjects (66,6 ± 2,7 years) completed an experimental trial at three intensities: 50%, 70% and 90% of a maximal repetition determined by the repetitions coefficients method (1-rmcr). two sessions, of each intensity, were completed of the following exercises: seated chest press, leg press, lat pulldown, triceps extension e biceps curl. the borg scale was used to evaluate the rpe at the end of each set, and 30 minutes following each exercise session (rpept). the wilcoxon (p≤0.05) test showed significant difference not only between the average rpe of each intensity, but also in the concerning rpept intensity. the intraclass correlation coefficient (icc) for rpept was 0,70. the results of our study allow us to conclude that rpe is a valid and reliable method in monitoring the resistance training session in elderly.
Cultivo de Gliricidia sepium e Leucaena leucocephala em alamedas visando a melhoria dos solos dos tabuleiros costeiros
Barreto, Antnio Carlos;Fernandes, Marcelo Ferreira;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001001000011
Abstract: the objective of this study was to evaluate the shoot biomass of gliricidia (gliricidia sepium) and leucaena (leucaena leucocephala) in an alley cropping system and the addition effect of this biomass on the chemical and physical properties of a yellow latosol of a coastal tableland area, at sergipe state, brazil. the yield of cassava cultivated in the alleys of these legumes was also evaluated. gliricidia was planted by cuttings in 1994, and leucaena was planted by seedlings in 1995, in rows of 3 m apart. at periods of three to five months, cuts were carried on and the shoot biomass was incorporated to the soil. stems with diameter higher than 1 cm were not considered in the biomass weight. the dry matter obtained in these cuts was expressed in ton ha1 year1. in 1998, soil samples were taken to quantify some soil chemical and physical properties. soil samples from a neighbor area were used as control. leucaena and gliricidia yield were, respectively, 4.87 and 5.80 ton ha-1 year -1 of shoot dry matter. gliricidia showed a lesser competition to cassava in the interrows. the incorporation of shoot biomass of both legumes to the soil caused an increment in the values of ph and ca+mg, but has not affected organic matter content and cec. decreases of the soil density and increases of the porosity were also observed in response to legume incorporation. these effects were most noticeable in the superficial layers.
Cultivo de Gliricidia sepium e Leucaena leucocephala em alamedas visando a melhoria dos solos dos tabuleiros costeiros
Barreto Antnio Carlos,Fernandes Marcelo Ferreira
Pesquisa Agropecuária Brasileira , 2001,
Abstract: O objetivo deste trabalho foi avaliar a biomassa da parte aérea de gliricídia (Gliricidia sepium) e leucena (Leucaena leucocephala) em cultivos em alameda, e o efeito da adi o dessa biomassa sobre propriedades químicas e físicas de um Latossolo Amarelo dos tabuleiros costeiros de Sergipe. A produ o de mandioca nas alamedas dessas leguminosas também foi determinada. A gliricídia foi plantada, em 1994, por estacas, e a leucena, em 1995, por mudas, utilizando-se o espa amento de 3 x 1 m, para ambas as espécies. Em intervalos de três a cinco meses, foram realizados cortes e incorpora o do material ao solo. Caules com diametro superior a 1 cm foram desconsiderados na biomassa. A matéria seca desses cortes foi determinada anualmente, e em 1998 realizaram-se análises químicas e físicas do solo. Amostras de solo de área contígua foram utilizadas como controle. Foram produzidas, respectivamente, 4,87 e 5,80 t ha-1 ano-1 de parte aérea, em média, por leucena e gliricídia. A gliricídia exerceu menor competi o com a mandioca na entrelinha. Com a incorpora o dessas leguminosas ao solo elevaram-se o pH e os teores de Ca+Mg, n o sendo alteradas, porém, a matéria organica e a CTC. Também foi observada redu o de densidade e eleva o da macroporosidade em resposta à adi o das leguminosas. Esses efeitos foram mais acentuados em menores profundidades.
Inter-rela??es genéticas entre espécies do gênero Spondias com base em marcadores AFLP
Santos, Carlos Antnio Fernandes;Oliveira, Viseldo Ribeiro de;
Revista Brasileira de Fruticultura , 2008, DOI: 10.1590/S0100-29452008000300028
Abstract: the goal of this study was to build a phenogram with thirty individuals of six spondias species, sampled in three different locations, based on 120 aflp markers of ecor1/mse1 primers combinations in order to clarify the inter-relationship among these species, to subside the establishment of economic grown of these species and to support genomic studies of these species. the upgma phenogram of jaccard coefficient was supported by a cophenetic value of 0.925 and the outside location of the two outgroups species mangifera indica and schinopsis brasiliensis, from the anacardiaceae family. all individuals of s. cytherea, s. tuberosa and s. purpurea were closely grouped independently of the sampling location, while four out six individuals of spondias sp (umbu-cajá) and s. mombin were hold together and two other were placed outside of the groups. the two individuals of spondias sp (umbuguela) were not closely positioned in the phenogram. the phenogram position of umbu-cajá and umbuguela, between s. tuberosa and s. mombin, and the percentage of similarities among 50 and 60% suggested that umbu-cajá and umbuguela could be hybrids of these two species. the produced phenogram suggested that s. cytherea was the most divergent spondias species.
Avalia??o Indirecta da Carga de Combustível em Pinhal Bravo
Fernandes,Paulo; Loureiro,Carlos; Botelho,Hermínio; Ferreira,António; Fernandes,Marta;
Silva Lusitana , 2002,
Abstract: the evaluation of forest fuel loading is required by most fire management activities. equations addressing each component of the maritime pine fuel complex - litter, downed woody fuel, understory vegetation, and tree crown foliage - were developed in order to quantify their respective fuel loadings. the models use easily obtainable independent variables that describe fuel structure (depth, height, cover, volume), tree dimension (diameter at breast height), or relate fuel load to stand age and structure.
Fósseis: Mitos e Folclore
Antonio Carlos Sequeira Fernandes
Anuário do Instituto de Geociências , 2005,
Abstract: Fossils have been familiar objects to man since the prehistoric times, with striking connotations in the folklore of several cultures. They were used as decorative elements in necklaces, regarded as heroes or giants in the classical greek and roman times, interpreted as teeth and bones of dragons, used as amulets against the bites and poisons of snakes, and as medicines to the treatment of several disorders. This article describes some of these examples.
Orthodontic Implants: Concepts for the Orthodontic Practitioner
Carlos Nelson Elias,Antnio Carlos de Oliveira Ruellas,Daniel Jogaib Fernandes
International Journal of Dentistry , 2012, DOI: 10.1155/2012/549761
Abstract: Orthodontic implants have become a reliable method in orthodontic practice for providing temporary additional anchorage. These devices are useful to control skeletal anchorage in less compliant patients or in cases where absolute anchorage is necessary. There are a great number of advantages in this new approach which include easy insertion, decreased patient discomfort, low price, immediate loading, reduced diameter, versatility in the forces to be used, ease of cleaning, and ease of removal. However, a proper management of the screws by the practitioner is necessary in order to increase the success rate of the technique. The purpose of this paper is to update practitioners on the current concepts of orthodontic implants and orthodontic mechanics. 1. Terminology A wide range of devices may be implanted in and around the jaws therapeutically, accidentally, or for social reasons, many of which are not endosseous dental implants. The orthodontic implants are used for specific time periods and do not always have osseointegration. Other terms such as miniscrews, miniscrew implants, microscrews, microscrew implants, and temporary anchorage devices have been used. In the literature [1, 2] terms such as mini/microimplants and mini/microscrews are often used interchangeably. It is more suitable to refer by the “screw” terminology to a variety of internal fixation devices intended to aid in the alignment and stabilization of fractures to the skeletal system until healing has occurred.Screws are fabricated from stainless steel, titanium alloy (TiAlV, TiNbZr, TiMoZr), Cr-Co alloy, and rigid polyurethane. Dental implants are made from commercially pure titanium and Ti-6Al-4V ELI (Extra Low Interstitial). There is no general agreement on the nomenclature. However, the standard ISO 16443 (Dentistry—Vocabulary of Oral Implantology) specifies terms and definitions for dental implants, instruments and accessories, and the most commonly used clinical terms in the field of dental implantology. In this standard, a dental implant is defined as a device especially designed to be placed within, through, or upon the bones of the craniofacial complex, the primary purposes of which are to support and to resist displacement of a dental prosthesis. According to this standard, the orthodontic implant is a device specially designed to be placed within, through, or upon the bones of the cranio-facial complex, the primary purpose of which is to provide anchorage for an orthodontic appliance. The purposes of orthodontic implants and dental implants are different. In this standard we do
Efeito da palha e da mistura atrazine e metolachlor no controle de plantas daninhas na cultura do milho, em sistema de plantio direto
Oliveira, Maurílio Fernandes de;Alvarenga, Ramon Costa;Oliveira, Antnio Carlos de;Cruz, José Carlos;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000100005
Abstract: the objective of this work was to study the effect of corn plant residue and mixture of atrazine plus metolachlor on weed control in no-till corn system. this experiment was performed in an oxisol, and the weed desiccation was done using glyphosate, 15 days before planting. the experimental design was a randomized block, with three replications. before corn planting, five levels of corn plant residues (0, 3, 6, 9 e 12tha-1) were equally distributed in the plots. two treatments were applied in subplots after corn planting: one without herbicide and the other one using the commercial mixture of atrazine plus metolachlor (1,200+ 1,800gha-1). different weed species were evaluated, at 26 and 41 days after planting. the total grass weeds number was significantly affected by the plant residue levels, independently of herbicide treatments and of evaluation period. the herbicide did not show a significant effect in the first evaluation period. however, in the second evaluation period, the herbicide reduced about 53% the total number of weeds compared to the plots without herbicide. it was verified that in the herbicide absence the total population of weeds were significantly higher in the second evaluation period. however, in the herbicide presence there was no significant difference in the total population of weeds between the two evaluated periods.
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