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Search Results: 1 - 10 of 63794 matches for " Antonio Teixeira do;Lima "
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Genetic Variability among Genotypes of Physic Nut Regarding Seed Biometry  [PDF]
Leonardo Fardim Christo, Tafarel Victor Colodetti, Wagner Nunes Rodrigues, Lima Deleon Martins, Sebasti?o Batista Brinate, José Francisco Teixeira do Amaral, Bruno Galvêas Laviola, Marcelo Antonio Tomaz
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.510156

With probable center of origin in Brazil, the species Jatropha curcas L., known as physic nut, is a tropical oilseed with potential for cultivation aiming at the production of biodiesel. This study was conducted with the objective of investigating the genetic variability regarding the morphology of seeds of physic nut, using biometric analyses to identify variables that have potential for the study of the diversity of the species and the classification of genotypes. Seeds of 22 genotypes of physic nut, from the germplasm bank of Embrapa Agroenergia (Brazil) were evaluated regarding characteristics of size and mass. The genotypes of Jatropha curcas L. selected by the Brazilian breeding program presented high diversity for characteristics of the seeds, allowing the exploration of this genetic variability to classify genotypes in different groups. In addition, variables related to the biomass of the seeds present high relative contributions to the diversity observed in the genotypes.

Differential Growth of Genotypes of Physic Nut Conditioned by Nitrogen Fertilization  [PDF]
Tafarel Victor Colodetti, Leonardo Fardim Christo, Lima Deleon Martins, Wagner Nunes Rodrigues, José Francisco Teixeira do Amaral, Bruno Galvêas Laviola, Marcelo Antonio Tomaz
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.514228

The adequate supply of nitrogen is essential for the plant metabolism. This nutrient has an irreplaceable role on the vegetative and reproductive growth of physic nut; therefore the correct management of the fertilization is very important, particularly in tropical regions, which present considerable losses of nitrogen by leaching and volatilization processes. This study was made with the objective of evaluating the growth of genotypes of physic nut conditioned by nitrogen fertilization. The experiment was conducted in controlled environment, following a factorial scheme 12 × 4, with 12 Brazilian genotypes of Jatropha curcas L. and 4 levels of nitrogen fertilization (0%, 50%, 100% and 150% of the recommendation), in completely randomized design, with four replications. The growth of the genotypes was evaluated at 100 days of cultivation. Positive response to the increase in the nitrogen supply was observed in most genotypes, with gain in plant height, stem diameter, number of leaves, leaf area and root volume. The levels of nitrogen fertilization promoted differential growth between genotypes, being possible to identify genotypes with superior growth for each level.

Applicability of the Method of Linear Dimensions to Estimate Leaf Area in Improved Genotypes of Coffea arabica and Coffea canephora  [PDF]
Sebasti?o Vinícius Batista Brinate, Wagner Nunes Rodrigues, Lima Deleon Martins, Tafarel Victor Colodetti, Marcelo Antonio Tomaz, José Francisco Teixeira do Amaral
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.65070
Abstract: There are different methods to determinate leaf area in coffee plants; however, methodologies that allow measurement of leaf area accurately and in nondestructive ways are very important, as they are less economically costly and enable measurements on the same leaf over time, making it possible to describe accurate patterns of growth. The objective of this study was to investigate the applicability of the method to estimate leaf area using linear dimensions of leaves for improved genotypes of Coffea arabica L. and Coffea canephora Pierre ex A. Froehner. The experiment was conducted in two separated competition fields, each one following factorial schemes 10 × 2, with 10 genotypes and 2 methods to obtain the leaf area: measuring linear dimensions, and using equation model (estimated leaf area) and leaf area integrator (real leaf area). The genotypes for both Coffea arabica L. and Coffea canephora Pierre ex A. Froehner have different leaf areas, making it possible to discriminate groups of genotypes for both species using the size of their leaves as classification criteria. Even with the differences between genotypes, the pattern of leaf shape remains similar, confirming the applicability of the method to estimate leaf area using linear dimensions of leaves for improved genotypes, such as the model proposed by Barros, without the occurrence of loss of accuracy for the improved genotypes, for both Arabica and Conilon coffee, studied in this experiment.
Severity of Leaf Rust and Brown Eyespot in Genotypes of Coffea arabica L. Cultivated with High Plant Density  [PDF]
Wagner Nunes Rodrigues, Marcelo Antonio Tomaz, Márcio Antonio Apostólico, Tafarel Victor Colodetti, Lima Deleon Martins, Leonardo Fardim Christo, Sebasti?o Vinícius Batista Brinate, Waldir Cintra de Jesus Jr., José Francisco Teixeira do Amaral
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.525386
This study investigated the severity of leaf rust and brown eyespot in genotypes of Coffea arabica L. cultivated with high plant density in the region of Caparaó-ES. The experiment was conducted in a competition field, cultivated with high plant density (8333 plants per hectare), following a randomized block design, with 16 genotypes and four replications. The plants were evaluated during consecutive harvests to study two complete reproductive cycles (from 2010 to 2012). Data were obtained for the phenologicalstages of flowering, graining, maturation and vegetative rest of each cycle. The severity of leaf rust (Hemileia vastratrix) and brown eyespot (Cercospora coffeicola) was evaluated using descriptive scales. It was observed that the genotypes are able to keep a considerable level of resistance to the leaf rust and brown eyespot when cultivated with increased density. The genotypes presented variability regarding the severity of the leaf rust and brown eyespot, indicating the existence of differential levels of resistance between them. For cultivation with high plant density, the genotypes Katipó, Paraíso MG H419-1, H419-3-3-7-16-4-1-1, Araponga MG1, Catucaí Amarelo 24/137, Catiguá MG2, Sacramento MG1, Pau-Brasil MG1, Catiguá MG3, Oeiras MG 6851 and Tupi present higher level of resistance for leaf rust. In addition, the genotypes Paraíso MG H419-1, Catiguá MG2, Pau-Brasil MG1, Catiguá MG3, Oeiras MG 6851, Tupi, Catuaí IAC 44, Catuaí IAC 81 and Catuaí IAC 144 present higher level of resistance for brown eyespot.
Nutritional Efficiency in Clones of Conilon Coffee for Phosphorus
Lima Deleon Martins,Marcelo Antonio Tomaz,José Francisco Teixeira do Amaral,Scheilla Marina Bragan?a
Journal of Agricultural Science , 2012, DOI: 10.5539/jas.v5n1p130
Abstract: The objective of this study was to evaluate the nutritional efficiency of phosphorus in clones of conilon coffee, in greenhouse condition. A factorial design 13 x 4 was used, with three replications, and the factors being: 13 clones that compose the clonal cultivar "Vitória Incaper 8142" and four levels of phosphorus fertilization (0%, 50%, 100% and 150% of the recommended P2O5 for the culture) in a completely randomized design (CRD). The cultivation consisted of a period of 150 days, then in each experimental unit, the values of dry matter and phosphorus content of the vegetative parts were obtained. The indices of nutritional efficiency (absorption, translocation and utilization) were calculated. The clones of conilon coffee showed different behavior for all variables at each level of fertilization with P2O5. The mass of dry weight, phosphorus content, and efficiency of phosphorus utilization of the clones increase linearly with the increase of P2O5. The efficiency of phosphorus absorption, depending on the levels of P2O5 applied to the clones of conilon coffee, has set to a quadratic model. The translocation efficiency of phosphorus, depending on the levels of P2O5 applied, is different for clones of conilon coffee, with a linear characteristic and also quadratic.
Are There Schizophrenia Genetic Markers and Mutations? A Systematic Review and Meta-Analyses  [PDF]
Maria Auxiliadora Brasil Sampaio Cardoso, Tárcia Januário do Nascimento, Gabriel Pereira Bernardo, Lorena Pereira Bernardo, Maria Mirelle Ferreira Leite Barbosa, Pedro Januário Nascimento Neto, Danilo Ferreira de Sousa, Antonio Gilvan Teixeira Júnior, Marcos Antonio Pereira de Lima, Marcial Moreno Moreira, David de Sousa Gregório, Lídia Coelho do Nascimento Santos, Modesto Leite Rolim Neto
Health (Health) , 2017, DOI: 10.4236/health.2017.95058
Background: Schizophrenia is a severe psychiatric disorder with a complex genetic factor determining its disease onset. Nevertheless, it is not clear in this mental disorder. Objective: To conduct a systematic review of articles regarding the genetic markers and mutations in schizophrenia. Methods: A systematic review of articles on genetic markers and mutations in schizophrenia, published from January 1, 2011, to September 7, 2015, on SCOPUS database was carried out. Search terms were “Genetic markers”, “Mutation”, and “Schizophrenia”. Results: Of the 527 retrieved studies, 31 met the eligibility criteria. Genetic polymorphism, Immune-associated genes, TCF4 and ZNF804A association with microRNA, Neuregulin gene, Chromosome 13q32 and 11p15.4, genes involved in glutamatergic via schizophrenia and brain structure, appeared to be associated with the origin of schizophrenia. Conclusion: Some studies show genes involved in several pathways leading to the disease pathogenesis such as that one related with the dopaminergic and immune system, or rare alleles. Some genes present no involvement in the etiology of this mental disorder. These findings clarify the genetic complexity of schizophrenia and affirm that together, the genes have an overall effect greater than the sum of the individual effect of each gene.
Suicide among Physicians and Methodological Similarities of MEDLINE/PubMED and BVS/BIREME Open Access Bibliographic Databases: A Systematic Review with Metanalysis  [PDF]
Kécia Silva Damasceno, élcio de Sousa Barbosa, Jo?o Vitor Candido Pimentel, Antonio Gilvan Teixeira Júnior, Airton César Pinheiro de Meneses, Jucier Gon?alves Júnior, Danilo Ferreira de Sousa, Paulo Sérgio da Costa Lima, Iara Bezerra Sales, Antonio Souto Gouveia, Elisabethe Peres Biruel, Modesto Leite Rolim Neto, Vania Barbosa do Nascimento
Health (Health) , 2017, DOI: 10.4236/health.2017.92025
Abstract: Background: Suicide among physicians is a serious public health issue, with an extremely complex and multifactorial behavior. Aim: The aim of this study was to use the theme “Suicide among Physicians” to exemplify the analysis of methodological similarities between the scientific content available at MEDLINE and BVS databases, as scientific research tools. Methods: This is a systematic review with metanalysis. The following combinations of keywords were used for data search in the referred databases: “suicide” AND “physicians” AND “public heath”. Results: Three hundred and thirteen publications were identified, but only 16 studies were chosen. Great association was found between MEDLINE and BVS databases and the Odds Ratio regarding the theme: “Suicide among physicians”. Conclusions: Considering the similarities found in the utilization of the two analyzed databases, it was possible to identify that suicide among physicians is associated with the exercise of an important professional role in the society and in the workplace. With regard to scientific information, the p-value-obtained value (<0.05) seems to be statistically significant for the association between the suggested theme and the methodological similarities of the scientific information available in the analyzed databases. Thus, these open-access research tools are considered scientific reliable tools.
Adaptation to Long-Term Rainfall Variability for Robusta Coffee Cultivation in Brazilian Southeast  [PDF]
Lima Deleon Martins, Fernando Coelho Eugenio, Wagner Nunes Rodrigues, Sebasti?o Vinicius Batista Brinati, Tafarel Victor Colodetti, Bruno Fardim Christo, Dionicio Belisario Luis Olivas, Fábio Luiz Partelli, José Francisco Teixeira do Amaral, Marcelo Antonio Tomaz, José Domingos Cochicho Ramalho, Alexandre Rosa dos Santos
American Journal of Climate Change (AJCC) , 2018, DOI: 10.4236/ajcc.2018.74030
Abstract: Coffee is one of the world most traded agricultural commodities. Currently, a lot of attention has been on Robusta coffee (Coffea canephora Pierre ex A. Froehner) because it seems to evidence a greater tolerance to extreme climatic events than Arabica coffee (C. arabica L.). Despite this, only a few works have been developed aimed at discriminating the climatic vulnerability in regions which prioritize robust coffee production. The aim of this work was to analyze historical climatic variables in space and time for the characterization of climatic vulnerability of micro-regions, in search of mitigation and adaptation, which might support the improvement of production systems of C. canephora coffee trees. The case study was carried out for one of the largest production regions of Robusta coffee of the world, in Brazil, geographically located between the 39°38' and 41°50' West longitude meridians and the 17°52' and 21°19' South latitude parallels. The vulnerability was characterized by the spatial and temporal variation of rainfall and rainfall seasonal pattern (based on 30 years of historical data), elements of climatic water balance, elevation and area planted with Robusta coffee. The choice of mitigation and adaptation were based on widely validated criteria. Overall, the results show that the vulnerability of Robusta coffee is related to low index of rainfall, the rainfall seasonability and the water deficiency. In the studied region, there is approximately 42% of some type of water vulnerability during the year, with a severe to medium scale; this vulnerability is very pronounced in regions farther away from the coast of the Atlantic Ocean, since for a year approximately 92% of them are water deficient. In addition, the data show that this distance from the ocean implies a reduction of 75% in the phases of water surplus not only. The strategies of greater potential for adaptation and mitigation are related to the planting of improved genotypes, utilization of polycultures systems, increasing plant density, the implementation of irrigation systems and the management of spontaneous plants.
Quantification of the diversity among common bean accessions using Ward-MLM strategy
Cabral, Pablo Diego Silva;Soares, Taís Cristina Bastos;Gon?alves, Leandro Sim?es Azeredo;Amaral Júnior, Antonio Teixeira do;Lima, Andreia Barcelos Passos;Rodrigues, Rosana;Matta, Frederico de Pina;
Pesquisa Agropecuária Brasileira , 2010, DOI: 10.1590/S0100-204X2010001000011
Abstract: the present work aimed at evaluating the divergence among common bean accessions by their agronomic, morphological and molecular traits, based on the ward-mlm procedure. a collection of 57 accessions from the gene bank of universidade federal do espírito santo was used in this study, from which: 31 were landraces belonging to the community fortaleza, in the municipality of muqui, es, brazil; 20 accessions were provided by embrapa trigo; and 6 were commercial cultivars. five agronomic traits (plant cycle, number of seeds per pod, number of pods per plant, weight of 100 seeds, and grain yield), five morphological traits (growth habit, plant size, seed shape, seed color, and commercial group) and 16 microsatellite primers were evaluated. high genetic variability was detected considering morphological, agronomic and molecular traits in the 57 common bean accessions studied. the ward-mlm procedure showed that the ideal number of groups was five, according to the pseudo f and pseudo t2 criteria. the accessions from andean origin had heavier seeds than others and formed a cluster. the ward-mlm statistical procedure is a useful technique to detect genetic divergence and to cluster genotypes by simultaneously using morphological, agronomic and molecular data.
A??o da fitase sobre a disponibilidade biológica do fósforo, por intermédio da técnica de dilui??o isotópica, em dietas com farelo de arroz integral para suínos
Figueirêdo, Agustinho Valente de;Fialho, Elias Tadeu;Vitti, Dorinha Miriam S.S.;Lopes, Jo?o Batista;Silva Filho, José Cleto da;Teixeira, Antonio Soares;Lima, José Augusto de Freitas;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000100024
Abstract: abstract - this experiment was carried out to determine the endogenous fecal losses of p and the effect of phytase on the biological availability of p in the diets and in the whole rice meal (wrm) for growing swines, by means of the isotopic dilution technique. the barrows were allotted to a complete randomized experimental design, with four treatments and three replicates. the treatments consisted on two diets without wrm (with or without 1250 ftu [unit of phytase activity]/kg diet), with 0.34% total p, and other two diets with wrm (with or without 1250 ftu/kg of diet), with 0.56% total p. an the 11th day, each animal was intravenously injected with 7.4 mbq 32p. the endogenous fecal losses of p were not affected by the action of phytase. the phytase addition reduced the total p excreted in the feces and improved the absorption and the biological availability of p of diets with whole rice meal.
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