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Search Results: 1 - 10 of 234673 matches for " Lúcia Helena Pinheiro Martins "
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Genetic Variability of Pumpkin Landraces in Brazilian Amazon  [PDF]
Lúcia Helena Pinheiro Martins, Hiroshi Noda, Maria Teresa Gomes Lopes, Maria Silvesnizia Paiva Mendon?a, Ayrton Luiz Urizzi Martins
Agricultural Sciences (AS) , 2016, DOI: 10.4236/as.2016.712075
Abstract: The family farm of the Upper Solim?es region has maintained the great genetic variability of the pumpkin (Cucurbita maxima Duchesne) by the in situ conservation of the landraces which are widely used as human food. The aim of this study was to estimate the current level of genetic variability of pumpkin landraces by means of estimation techniques of genetic parameters. Landraces areas samples were the family farming production units located in floodplains ecosystems of Benjamin Constant (Upper Solim?es River) and Iranduba (Lower Solim?es River), Amazonas. The split-plot designs were adopted at the treatments where the main plots were the five pumpkin landraces and one commercial cultivar. Each landrace was obtained six half sib families distributed in the sub-plots. Among the results of this study, it can be concluded that the genetic variation within the each landrace is greater than the genetic variation among the landraces. The qualitative morphological characteristics bring together half-sib families collected in geographically distant locations. It can be concluded that, through the estimation of genetic parameters, there is genetic variability among local cultivars collected in family farming of Benjamin Constant and Iranduba, Amazonas.
Agroecosystems, Landscapes and Knowledge of Family Farmers from Arama?á Island, Upper Solim?es Region, Amazon  [PDF]
Ayrton Luiz Urizzi Martins, Sandra do Nascimento Noda, Hiroshi Noda, Lúcia Helena Pinheiro Martins, Elisabete Brocki
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.910095
Abstract: The family farmer’s knowledge about floodplains agroecosystems dynamics is part of agrobiodiversity conservation cognitive strategies. This is because the conservation in floodplains is conditioned by the ecophysiological adaptation to the period and flood gradient of the agricultural lands and by the transformations promoted in the environment by the waters pulse. The aim of this study was to understand the cognitive strategies expressed in the organized meaning of agroecosystems by local knowledge, related to the geomorphological dynamics of the Aramaçá Island, Amazonas, Brazil. In this research, the Case Study and Ethnoecology were adopted as approach, taking the systemic complexity paradigm as a theoretical framework. To do so, it was necessary to establish a dialogue with the local knowledge through multitemporal analyses of satellite images, historical series of hydrological data, as well as cartographic documents of the locality. The floodplains amphibian mark, as a living organism in permanent autopoietic process, seems to be imprinted in the family farmer’s knowledge. In order to live in the floodplains and of floodplains, it is necessary, above all, to develop a cognitive ability capable of understanding not only the rivers action on the lands, but also that of the lands on the rivers as well. Therefore, the geomorphological dynamics in the spaces managed by the family farmers impose on them, risks and uncertainties, demanding from them strategies that allow knowing and dealing with this complexity.
Molecular Study of the Genetic Variability of Pumpkins Landraces from Brazilian Amazon  [PDF]
Lúcia Helena Pinheiro Martins, Maria Teresa Gomes Lopes, Hiroshi Noda, Pedro de Queiroz Costa Neto, Ayrton Luiz Urizzi Martins, Fabíola Viana de Almeida, Liane Cristine Rebou?as Demosthenes
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.94035
Abstract: The Cucurbita maxima Duchesne is a vegetable crop plant cultivated and maintained by traditional Amazon communities, Brazil. The situation is worsened by the possibility of disappearance of local populations and genetic variability of this specie, taking into account the today changes promoted in family farming. The aim of this study was to estimate the current levels of genetic variability of local cultivars through the use of molecular markers (Amplified Fragment Length Polymorphism—AFLP). We chose to collect in two distinct micro regions in order to identify possible influences of geographic isolation and different levels of market requirements in the conservation of the genetic variability of the C. maxima. For the molecular analysis, bulk samples of fresh leaves of 15 plants/half-sibling family were collected in paper bags. There were 34 samples from the half-sib families. The analysis of the results half-sib obtained by methods of estimation of genetic variation by molecular markers shows that the forms of cultivation and management adopted by family farmers maintain the identities of the local/landraces (native cultivars) and, at the same time, the levels of diversity for the assurance of adaptability macro-environmental.
Caracteriza??o e avalia??o do potencial agron?mico e nutricional de etnovariedades de cubiu (Solanum sessiliflorum Dunal) da Amaz?nia
Silva Filho, Danilo Fernandes da;Yuyama, Lucia Kiyoko Ozaki;Aguiar, Jaime Paiva Lopes;Oliveira, Maslova Carmo;Martins, Lúcia Helena Pinheiro;
Acta Amazonica , 2005, DOI: 10.1590/S0044-59672005000400003
Abstract: cubiu (solanum sessiliflorum dunal), is an important genetic resource for the amazonian people, because its fruit is traditionally usede for food, medicine and cosmetics. as na excellent product for agribusiness, it is important to study the species to contribuite to regional development. the agronomic and nutritional potential of different cubiu ethnovarietes (etns) was characterized and evaluated., in an experiment at inpa's horticulture experimental station, manaus, amazonas, brazil, on a sandy textured, low fertility, alic, red-yellow podzol, in an experimental design of randomized blocks, with 28 treatments (the etns) and four repetitions, the following fruit agronomic and chemical composition characteristics were evaluated: fruit number, shape, length, diameter, weight, pulp thickness, potassium, zinc, manganese, sodium, iron, magnesium and calcium. there were significant differences among the etns for all characteristics. the 28 etns were could be classified into nine different fruit shape. fruit number/plant varied from 4 to 89, and mean fruit weight from 18.5 to 301g. among the macroelents, potassium had the highest concentration in all 28 etns (varying from 54.6 to 563.5 mg in 100 g fresh pulp). the etn from lábrea (am) produced the fruits with highest concentrations of this element. among the microelements, iron varied from 97.3 to 352 mcg and the etn from barcelos (am) had the highest concentration. in general, the etns presented ample genetic variability to be exploited in a cubiu improvement program.
Contribui??es da neuropsicologia para a psicologia clínica e a educa??o
Moretti, Lúcia Helena Tiosso;Martins, Jo?o Batista;
Psicologia Escolar e Educacional , 1997, DOI: 10.1590/S1413-85571997000100008
Abstract: the aim was to study somme aspects ofneuropsychological evoluation and traditional tests aplyed individualy to 12 subjects (8 to 13 years old). the qualitative analyses showed problematic aspects in the traditional evaluation.
Conseqüências genéticas da regenera??o natural de espécies arbóreas em área antrópica, AC, Brasil
Martins, Karina;Ribas, Luciano Arruda;Moreno, Maria Andréia;Wadt, Lúcia Helena de Oliveira;
Acta Botanica Brasilica , 2008, DOI: 10.1590/S0102-33062008000300025
Abstract: spanish cedar (cedrela odorata l.) and yellow poui (tabebuia serratifolia nichols.) are economically valuable tropical tree species that have been threatened by predatory logging and by forest fragmentation. their seeds are wind-dispersed and both the species colonize and grow-up in pastures. this study compared the genetic diversity in a pasture-established population to a forest population. thirty yellow poui trees were genotyped with five isozyme loci and fifty four spanish cedar trees were genotyped with four microsatellite loci. genetic diversity was high in both the populations. in yellow poui, genetic diversity was higher in the pasture population. it was observed loss of alleles in cedar pasture population (a = 11,75 alleles/locus) in relation to the forest population (a = 14,50).moreover, 31% of the cedar alleles were private to the forest population. genetic divergence was null in yellow poui populations, but significant in the cedar ones (2,2%). pasture populations don't show evidence of severe genetic bottleneck for both the species. colonization of anthropogenic areas by these species was efficient, but it requires continuous gene flow, through successive generations, in order to restore (for spanish cedar) and maintain (for yellow poui) the levels of genetic diversity observed in the forest population.
Germina??o de sementes e crescimento de plantulas de soja (Glycine max L. Merrill) sob cobertura vegetal
Nóbrega, Lúcia Helena Pereira;Lima, Gislaine Piccolo de;Martins, Gislaine Iastiaque;Meneghetti, Adriana Maria;
Acta Scientiarum. Agronomy , 2009, DOI: 10.4025/actasciagron.v31i3.320
Abstract: in order to be efficient, the crop rotation system requires, among other factors, an adequate choice of species to be installed. vegetal cultures can feature allelochemical compounds, released by root hairs, roots, stems and leaves in variable amounts, which are able to interfere on subsequent cultures, as well as cause a delay in their production. thus, this study analyzed the allelopathic potential of black oat (avena strigosa schreb) (bo), forage turnip (raphanus sativus l.) (ft), vetch (vicia sativa l.) (v), ryegrass (lolium multiflorum lam.) (rg) and consortium (co - bo+v+ft) on soybean seed germination and plantlet growth. this trial was carried out in a laboratory, with sand substrate, where coverage plants were grown, during 30 days. the remaining root portions of plants were kept with and without the remaining aerial part portions. a reduction was observed on the emergence of soybean plantlets under co, rg and bo. the emergence speed index (esi), emergence percentage on sand (es) and the green mass of hypocotyls (gmh) were negatively affected by coverage plants, and due to this, another study is essential to verify whether there is an indication of the allelopathic effect.
Análise de crescimento de minimilho submetido a laminas de irriga o = Analysis of growth of minimilho subjected to irrigation depths
Adriana Maria Meneghetti,Reginaldo Ferreira Santos,Lúcia Helena Pereira Nóbrega,Gislaine Iastiaque Martins
Acta Scientiarum : Agronomy , 2008,
Abstract: Este trabalho avaliou laminas de irriga o no crescimento da cultura do milho (Zea mays L.) para obten o de minimilho, determinadas pela evapotranspira o da cultura, baseadas na evapora o da água do Tanque “Classe A” e aplicadas quando a evapotranspira o atingia os valores acumulados: T1 - 15 mm, T2 - 30 mm, T3 - 45 mm e T4 - 60 mm. Foi utilizado delineamento estatístico inteiramente casualizado com quatro tratamentos e cinco repeti es. Os resultados foram submetidos à análise estatística, pelo programa Sisvar, determinando-se análise de variancia. As médias dos tratamentos foram comparadas a 5% de probabilidade pelo teste de Tukey e pela análise de regress o. Foramselecionadas cinco plantas por parcela para análise das características de crescimento: estatura da planta (EP), número de folhas (NF), área foliar (AF) e índice de área foliar (IAF). Observaram-se diferen as significativas nos valores de AF e IAF. O aumento nas laminas de irriga o e na freqüência de aplica o implicou em maiores valores AF. This research evaluated the variation of depth irrigation in the maize culture growth (Zea mays L.) for obtaining the baby corn, determined from the culture evapotranspiration, based on class A pan evaporation and applied when the evapotranspiration reached follow theaccumulated values: T1 - 15 mm, T2 - 30 mm, T3 - 45 mm and T4 - 60 mm. The statistical design was the outlinement completely whit four treatments and whit five repetitions, the results had been submitted to the statistics analysis for the Sisvar program and determined itvariance analysis and the treatments averages had been compared in 5% of probability for the Tukey test and the regression analysis. Five plants were selected for analysing the growth for parcel. The characteristics that belongs to the growth: plant height (PE), leafnumber (LN), foliar area (FA) and foliar area index (FAI). Were observed significant differences in the values of FA and FAI. The increase in the depth irrigation and the application frequency implied in bigger values of FA and FAI.
Germina o de sementes e crescimento de plantulas de soja (Glycine max L. Merrill) sob cobertura vegetal = Soybean (Glycine max L. Merrill) seed germination and plantlet growth under vegetation cover
Lúcia Helena Pereira Nóbrega,Gislaine Piccolo de Lima,Gislaine Iastiaque Martins,Adriana Maria Meneghetti
Acta Scientiarum : Agronomy , 2009,
Abstract: A eficiência do sistema de rota o de cultura requer, entre outrostratamentos, a escolha adequada das espécies a serem instaladas. Culturas vegetais podem apresentar compostos aleloquímicos, os quais s o liberados por meio de pelos radiculares, sementes, raízes, colmos e folhas, em quantidades variáveis, capazes de interferir nas culturas subsequentes, comprometendo a produ o. Assim, este estudoanalisou o potencial alelopático de aveia-preta (Avena strigosa Schreb) (AP), nabo forrageiro (Raphanus sativus L.) (NF), ervilhaca (Vicia sativa L.) (ER), azevém (Lolium multiflorum Lam.) (AZ) e consórcio (CO - AP+ER+NF) na germina o de sementes e crescimento de plantulas de soja. O experimento foi em laboratório, com substrato deareia, onde foram cultivadas plantas de cobertura, por 30 dias, mantendo os restos radiculares das plantas com e sem restos de parte aérea. Observou-se redu o na emergência de plantulas de soja sob CO, AZ e AP. O índice de velocidade de emergência (IVE), a porcentagem de emergência em areia (EA) e a massa fresca de hipocótilo (MFH) foram afetados negativamente pelas plantas de cobertura. In order to be efficient, the crop rotation system requires, among other factors, an adequate choice of species to be installed. Vegetalcultures can feature allelochemical compounds, released by root hairs, roots, stems and leaves in variable amounts, which are able to interfere on subsequent cultures, as well as cause a delay in their production. Thus, this study analyzed the allelopathic potentialof black oat (Avena strigosa Schreb) (BO), forage turnip (Raphanus sativus L.) (FT), vetch (Vicia sativa L.) (V), ryegrass (Lolium multiflorum Lam.) (RG) and consortium (CO - BO+V+FT) on soybean seed germination and plantlet growth. This trial was carried out in a laboratory, with sand substrate, where coverage plants were grown, during 30 days. The remaining root portions of plants were kept with and without the remaining aerial part portions. A reduction was observed on the emergence of soybean plantlets under CO, RG and BO. The emergence speed index (ESI), emergence percentage on sand (ES) and the green mass of hypocotyls (GMH) were negatively affected bycoverage plants, and due to this, another study is essential to verify whether there is an indication of the allelopathic effect.
Fatores associados ao uso de preservativo masculino e ao conhecimento sobre DST/AIDS em adolescentes de escolas públicas e privadas do Município de S o Paulo, Brasil
Martins Laura B. Motta,Costa-Paiva Lúcia Helena S. da,Osis Maria José D.,Sousa Maria Helena de
Cadernos de Saúde Pública , 2006,
Abstract: Comparar o conhecimento sobre DST/AIDS e avaliar fatores associados ao conhecimento adequado e ao uso consistente do preservativo masculino, em adolescentes de escolas públicas e privadas do Município de S o Paulo. Participaram 1.594 adolescentes entre 12 e 19 anos, de 13 escolas públicas e 5 privadas, que responderam um questionário sobre DST/AIDS e uso de preservativo. Calcularam-se as raz es de prevalência com intervalo de confian a de 95%. O escore de conhecimento sobre DST teve o ponto de corte equivalendo a 50% de acerto. Os testes estatísticos foram qui-quadrado e Wilcoxon-Gehan. Realizou-se regress o múltipla de Poisson. O uso consistente de preservativo foi 60% nas escolas privadas e 57,1% nas públicas (p > 0,05) e esteve associado ao sexo masculino e menor nível sócio-econ mico. O sexo feminino, maior escolaridade, escola privada, cor branca e estado marital solteiro associaram-se ao maior conhecimento sobre DST. Os adolescentes de escola pública e privada apresentam conhecimento adequado sobre preven o de DST, entretanto esse conhecimento n o determina ado o de atitudes efetivas de preven o. Programas de conscientiza o sobre DST/AIDS devem ser ampliados visando minimizar as vulnerabilidades.
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