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Search Results: 1 - 10 of 61394 matches for " Fabiano Guimar?es Silva "
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Methods to overcome of the dormancy in murici (Byrsonima verbascifolia Rich) seeds Métodos para supera o da dormência de sementes de murici (Byrsonima verbascifolia Rich)
Paula Sperotto Alberto,Fabiano Guimares Silva,Juliana Silva Rodrigues Cabral,Juliana de Fátima Sales
Semina : Ciências Agrárias , 2011,
Abstract: The great agricultural development in the Brazilian savannah brought with it the reduction of its natural vegetation, which has been quickly lost, especially due to extractive exploitation by man. Murici (Byrsonima verbascifolia Rich) is a fruit bearing plant of great medicinal importance in the savannah; however, its propagation is hindered by the fact that the seeds have low germination and seedling emergence in the field is slow. This study evaluated the effect of different dormancy breakage methods in murici seeds. Therefore, were evaluated effect of different temperatures; soaking in gibberellic acid and water; chemical and mechanical scarification and two types of substrate (distilled water and KNO3). Treatments were arranged in a randomized block design. Records made daily on the number of germinated seeds were used to determine the germination percentage and germination speed index. Among the methods evaluated, giberellic acid at 2,309.46 ?M gave the greatest seed germination percentage, especially when the germination paper was moistened with KNO3. O grande desenvolvimento agrícola na regi o do Cerrado foi acompanhado pela redu o da vegeta o atual e essa rica forma o vegetal vem sofrendo uma rápida depreda o, principalmente devido à explora o extrativista por parte do homem. O murici (Byrsonima verbascifolia Rich) destaca-se por ser uma planta de grande importancia medicinal e frutífera do cerrado, entretanto, sua propaga o é dificultada pelo fato de suas sementes terem baixa taxa de germina o e a emergência das plantulas em campo serem lentas. Objetivou-se com este trabalho avaliar o efeito de diferentes métodos de supera o de dormência em sementes de murici. Para tanto, foram avaliados o efeito de diferentes temperaturas; imers o em ácido giberélico; imers o em água e escarifica o química e mecanica do endocarpo e dois tipos de substrato umedecidos (água destilada e KNO3), dispostos em delineamento de blocos ao acaso. Foram realizadas contagens diárias para determinar a porcentagem de germina o e índice de velocidade de germina o. Entre os diversos métodos avaliados, o ácido giberélico a 2.309,46?M proporcionou maior porcentagem de germina o das sementes, sobretudo quando o papel de germina o foi umedecido com KNO3.
Qualidade dos frutos de genótipos de tomateiro do banco de germoplasma de hortali?as da Universidade Federal de Vi?osa
Mattedi, André Pugnal;Guimares, Marcelo de Almeida;Silva, Derly José Henriques da;Caliman, Fabiano Ricardo Brunele;Marim, Bruno Garcia;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000400018
Abstract: fruit quality of 29 tomato accesses from the vegetable germplasm bank of the universidade federal de vi?osa and three commercial cultivars, santa clara, débora plus and fanny were evaluated for the characteristics soluble solids (ss), acidity (at), ph and ss/at ratio (flavor fruits indicator). the accesses showed significant variation for the evaluated characteristics, except for the ph. the accesses bgh-700, bgh-2000, bgh-2008, bgh-2013, bgh-2014 and bgh-2017 stood out for the ss content, which were higher than 4.2 obrix and the ss content of the commercial cultivars. acidity of the accesses bgh-2013, bgh-2019, bgh-2020 and bgh-2033 was higher, above 0.57%. the commercial cultivars were classified into the group with the lowest acidity, with values under 0.46%. the accesses bgh-700, bgh-2000, bgh-2008 and the commercial cultivar débora plus stood out for the ss/at ratio, with values of 11.1, 11.9 and 10.9, and 10.0, respectively.
Occurrence of insects and use of natural and synthetic insecticides in the storage of seeds of wild radish Ocorrência de insetos e uso de inseticidas naturais e sintéticos no armazenamento de sementes de nabo forrageiro
Geraldo Cabral e Souza,Juliana de Fátima Sales,Fabiano Guimares Silva,Márcio Fernandes Peixoto
Semina : Ciências Agrárias , 2012,
Abstract: Knowing the importance of preventive use of insecticides for seed treatment, this study aimed to identify potential insect pests of storage for seeds of radish by means of traps set on the field for six months and to evaluate the effect of natural and synthetic substances insecticides on the emergence of radish seedlings stored for 120 days. The bioassay, field-level, was conducted over a period of six months in the following environments: savannah, area of cultivation of crops, pasture and forest at the Federal Institute Goiano. For each of these environments were placed five traps made of PET bottles, containing respectively in maize, millet, soybean, crambe and wild radish. The traps were inspected every seven days to verify the the occurrence of insects plague. The substances were: 1) saffron, 2) limestone, 3) Gray, 4) neem, 5) diatomaceous earth, 6) chlorpyrifos, 7) deltamethrin and 8) control treatment. The experimental design was randomized blocks in factorial scheme 8 x 2 (8 substances and two storage periods, is not stored seeds and seeds stored for 120 days) with four replications. Were evaluated the percentage of emergence, hold rate of emergence, time to reach 50% emergence and the record of the dry mass of seedlings. The natural and synthetic substances do not interfere with seedling emergence in seeds of wild radish, even after storage for 120 days in a room. In the traps in the field, containing seeds of wild radish noted the presence of the insect Carpophilus sp. Sabendo da importancia do uso preventivo de inseticidas no tratamento de sementes, esta pesquisa teve por objetivos identificar possíveis insetos praga de armazenamento para sementes de nabo forrageiro por meio de armadilhas montadas em campo durante seis meses e avaliar o efeito de substancias inseticidas, naturais e sintéticas na emergência de plantulas em sementes de nabo forrageiro armazenadas por 120 dias. O bioensaio, em nível de campo, foi conduzido por um período de seis meses nos seguintes ambientes: cerrado, área de cultivo de grandes culturas, pastagem e mata do Instituto Federal Goiano. Para cada um desses ambientes foram colocadas cinco armadilhas confeccionadas em garrafas PET, contendo respectivamente sementes de milho, milheto, soja, crambe e nabo forrageiro. As armadilhas foram inspecionadas a cada sete dias para a verifica o da ocorrência de insetos praga. As substancias consistiram de: 1) a afr o, 2) calcário, 3) cinza, 4) nim, 5) terra de diatomáceas, 6) clorpirifós, 7) deltametrina e 8) tratamento controle. O delineamento experimental foi em blocos ao acaso
Growth, production and chemical composition of the essential oil in hortel -do-campo (Hyptis marrubioides Epl.) in function of the irradition level / Influência do nível de irradiancia no crescimento, produ o e composi o química do óleo essencial de hortel -do-campo (Hyptis marrubioides Epl.)
Juliana de Fátima Sales,José Eduardo Brasil Pereira Pinto,Pedro Henrique Ferri,Fabiano Guimares Silva
Semina : Ciências Agrárias , 2009,
Abstract: In the present work, the level of irradiation of 20, 60 and 100% of natural light on the growth, content and composition of the essnetial oil of “hortel do campo” (Hyptis marrubioides) was evaluated. The experiment was conducted in the completely randomized design with twenty-five replicates per treatment. After 132 days of cultivation, plant growth and the content and compositoin of the essntial oil were investigated. At 100% of irradiation, the plants presented less height as compared with the shaded treatments. The ratio branch/leaf was higher at the level of irradiation of 20%. It was found that in the full sunshine, the plants showed lower height as compared with the shaded treatments. The leaf/ branch ratio was higher at the lowest level of irradition of 20%. The number of branches and the plant mass accumulation were greatest at the level of irradition of 100%. The content of essential oil was not influenced by the levels of irradiation, but the yield was greater when grown at the level of 100% of irradiation. The chemical composition of the essential oil of Hyptis marrubioides did not present any alterations with the different levels of irradiation, except for iso-3-tujanol and ?-cadineno, which presented highest concentrations in plants grown, respectively at 100 and 60% of irradiation. The major component of teh essential oil of H. marrubioides, independent of the levels of irradiation was cistujona oxygenated monoterpene (37.78%), followed by sequiterpenes hiydrocarbonetes (E)-cariofileno (14.93%), ?-copaeno (11.03%) and ?-muuroleno (9.60%). No presente trabalho avaliou-se o nível de irradiancia de 20, 60 e 100% de luz natural no crescimento, teor e a composi o do óleo essencial de hortel -do-campo (Hyptis marrubioides). O experimento foi conduzido no delineamento inteiramente casualizado, com vinte e cinco repeti es por tratamento. Após 132 dias de cultivo analisou-se o crescimento da planta, o teor e a composi o do óleo essencial. Em 100% de irradiancia as plantas apresentaram menor altura, quando comparado aos tratamentos sombreados. A rela o ramo/folha foi maior no nível de irradiancia de 20%. O número de ramos e o acúmulo de fitomassa foram maiores no nível de irradiancia de 100%. O teor de óleo essencial n o foi influenciado pelos níveis de irradiancia, mas o rendimento foi maior quando cultivadas a 100% de irradiancia. A composi o química do óleo essencial n o apresentou altera es com os diferentes níveis de irradiancia, exceto para o iso-3-tujanol e ?-cadineno, que apresentaram maiores concentra es em plantas cultivadas respec
In vitro cultivation of Anacardium othonianum Rizz.: effects of salt concentration and culture medium volume
Assis, Kerlley Cristina de;Pereira, Flávia Dionísio;Cabral, Juliana Silva Rodrigues;Silva, Fabiano Guimares;Silva, José Waldemar;Santos, Silvia Correa dos;
Acta Scientiarum. Agronomy , 2012, DOI: 10.4025/actasciagron.v34i1.10984
Abstract: anacardium othonianum rizz. is a medicinal plant species that is native to the brazilian savannah. adult plants are different from other genus members in this ecosystem due to their size, and efforts to locate the plants may lead to their extraction from the savannah and, frequently, plant death. micropropagation has played a significant role in the propagation and preservation of specimens of several plant species; therefore, this study evaluated the effect of various salt concentrations and culture medium volumes on the in vitro cultivation of a. othonianum rizz. trial (i) evaluated two culture media (ms and wpm) and three salt concentrations (100, 50 and 25%) in a completely randomized design. trial (ii) evaluated two culture media and salt concentrations, ms (50%) and wpm (100%), and five medium volumes (10, 15, 20, 25 and 30 ml per test tube) as a 2 x 5 factorial in a completely randomized design. after 30 and 60 days of growth, the percentage of plantlet survival, average plantlet and leaf lengths and the average number of leaves and buds per explant were evaluated. the ms (50 and 25%) media and wpm (100 and 50%) media were the most effective for plantlet regeneration. the best responses were observed in 15- and 25-ml volumes of the ms (50%) medium. therefore, the use of a 15-ml volume is suggested for greater medium economy.
Effect of drying and soaking fruits and seeds on germination of macaw palm (Acrocomia aculeata [Jacq.] Loddiges ex MART.)
Rubio Neto, Aurélio;Silva, Fabiano Guimares;Sales, Juliana de Fátima;Reis, Edésio Fialho dos;Silva, Marcus Vinícius Vieira da;Souza, Apolyana Lorraine;
Acta Scientiarum. Agronomy , 2012, DOI: 10.4025/actasciagron.v34i2.11752
Abstract: this study evaluated mechanisms of the dehydration and rehydration of fruits and seeds on the resulting embryo viability of the macaw palm, acrocomia aculeata (jacq.) loddiges ex mart. dehydration was performed in a forced-air oven at 37 ± 2°c for 0, 3, 6, 9, 12 or 15 days, and after these periods, the embryo viability was evaluated by the tetrazolium test. the effect of hydration on the germination percentage and velocity index was evaluated by the imbibition of seeds with distilled water in a germinator at 30 ± 2°c for 0, 2, 4, 6, 8 or 10 days. the seeds were then treated with fungicide and maintained in a mangelsdorf germinator at 30 ± 2°c. drying caused a progressive water loss in the fruits and facilitated the extraction of the seeds. fruits subjected to drying for up to nine days had no loss of vigor; however, after dehydration for 15 days, a loss in seed viability was observed. simple linear regression estimated the seed water content based on the fruit water content. seed imbibition in distilled water favored an increase in dead by fungally contaminated seeds.
Homens apenados e mulheres presas: estudo sobre mulheres de presos
Guimares, Cristian Fabiano;Meneghel, Stela Nazareth;Zwetsch, Bárbara Elisa;Silva, Luciano Bairros da;Grano, Michelle da Silva;Siqueira, Thaís Pereira;Oliveira, Carmen Silveira de;
Psicologia & Sociedade , 2006, DOI: 10.1590/S0102-71822006000300007
Abstract: the objective of this research was to know the wives of a group of convicted men, serving their time partially at home, and to identify the discriminations they had to go through, including those of gender. we searched to identify the possible labeling for having a convicted relative and the strategies of resistance that these women use in everyday life. the research method is qualitative and information was obtained by means of participation-observation and focal groups with the wives of convicts in a prison facility in the metropolitan region of porto alegre, rs, in a semi-open regime. the wives of convicts submit themselves to situations of control, based on the systems of class and gender domination. from our analysis, the labeling in relation to this social group was found in-between the lines, in other words, implied meanings appeared in their statements. however, the women actively resist to violence, seeking support in family and neighborhood networks. the precariousness of social supporting networks and the lack of information and access to the job market contribute to the marginalizing of the convict and his family, clearly denoting the importance of studies that seek to integrate this social group.
The germination of bush mint (Hyptis marrubioides EPL.) seeds as a function of harvest stage, light, temperature and duration of storage
Sales, Juliana de Fátima;Pinto, José Eduardo Brasil Pereira;Oliveira, Jo?o Almir de;Botrel, Priscila Pereira;Silva, Fabiano Guimares;Corrêa, Ricardo Monteiro;
Acta Scientiarum. Agronomy , 2011, DOI: 10.4025/actasciagron.v33i4.4611
Abstract: this study evaluated the effect of light, temperature, physiologic stage at harvest and length of time on the germination of hyptis marrubioides seeds. two trials were conducted. the first experiment was performed immediately after the seed harvest and consisted of a 2 x 3 x 3 factorial design with 2 environmental conditions (light and dark), 3 temperatures (20, 30 and 20/30oc) and 3 seed harvest times (green colored seeds, light brown seeds and dark brown seeds). the second experiment was conducted in the presence of light at a temperature of 30oc and consisted of a 4 x 3 factorial design, with 4 storage times (0, 6, 12 and 18 months) and the 3 three harvest physiologic stages used in the previous experiment. both of the experiments were conducted in randomized blocks, with 4 replications of 100 seeds. light did not affect germination. by contrast, a temperature of 20oc retarded the germination process, although the percentage of germinating seeds was not affected. seed storage and the different harvest physiologic stages affected the germination velocity index (ivg) and the germination percentage. seeds that were harvested at the more mature stage (dark brown color) could be stored for up to 18 months.
Produ??o e sabor dos frutos de tomateiro submetidos a poda apical e de cachos florais
Guimares, Marcelo de A;Silva, Derly José H da;Fontes, Paulo Cézar R;Caliman, Fabiano Ricardo B;Loos, Rodolfo A;Stringheta, Paulo C;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000200027
Abstract: the effect of top-shoot and floral cluster pruning on the production and flavor of the tomato fruits were experimentally evaluated (may to november of 2002). the experimental design was of randomized blocks, with five treatments, seven replications, and eight-plant plots. seedlings from cultivar kindyo of indeterminate growth habit, were used. treatments were: (a) pruning of the 1st floral cluster and top-shoot pruning above the 7th floral cluster; (b) same as a, but without top-shoot pruning and with pruning of the floral clusters above the 7th cluster; (c) without pruning the 1st floral cluster, but with top-shoot pruning above the 6th floral cluster; (d) same as c, but without top-shoot pruning and with pruning of floral clusters above the 6th.; (e) without top-shoot and floral cluster pruning, but evaluating only the first six floral clusters. tomato fruits were harvested, graded and weighed in a week basis, after reaching maturity (100% red). data were submitted to variance analysis and tukey's test (p<0.05). pruning of the 1st floral cluster was detrimental for commercial production of tomato fruits. the preservation of plant growth in combination with pruning of floral cluster above the sixth, without pruning the first floral cluster (treatment d), significantly increased the production of large fruits (101.5 t ha-1) in relation to the other treatments (treatment a: 74.9; b: 71.4; c: 80.3; e: 78.9 t ha-1). however, for commercial production, treatment d (127.7 t ha-1) significantly differed only from treatments a and b (106.6 and 99.4 t ha-1, respectively). for total production, flavor, obrix, and ph, whose averages were respectively 149.4 t ha-1; 13; 4,32%, and 4,34, there were no significant differences.
Métodos de supera??o de dormência em sementes de croada (Mouriri elliptica Mart)
Vasconcelos, Jaqueline Martins;Cardoso, Thálita Vaz;Sales, Juliana de Fátima;Silva, Fabiano Guimares;Vasconcelos Filho, Sebasti?o Carvalho;Santana, Jo?o das Gra?as;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000500017
Abstract: croada seeds (mouriri elliptica mart.) melastomataceae, a fruit-bearing species native of the cerrado (savannah-like vegetation), were submitted to the following dormancy breaking methods: pre-cooling at 5° c for 7 days; pre-heating in a oven air circualtion at 40o c for 7 days; chemical escarification in concentrated sulfuric acid for 5 and 15 min; soaking in boiling water for 5 and 15 min; soaking in gibbereli acid at 100 and 200 mg l-1 for 48 hours; soaking into distilled water for 24 and 48 hours; mechanical escarification with a sandpaper number 80 at teh upper aprt and opposed to the embryonary axis and control (seeds without any previous treatment). the seeds were put to germinate on a "germitest" type paper moistened with destilled water or 0.2% potassiun nitrate. daily counts between the 2nd day after the establishment of the experiment till the stabilization, which took place on the 60th day, were performed. seeds germinated faster when they were pre-soaked in gibberelic acid, independent of if placed to germinate on a water-moistened substrate or with a soultion of 0.2% potassiun nitrate, pre-soaked into water for 24 hours, on a water-moistened substrate, or independent of the substrate, and, pre-soaked into water for 48 hours or mechanical escarification and put to germinate on a water-containing substrate. higher germination rates occurred in seeds pre-soaked into 100 or 200 mg l-1 gibberelic acid, on a substrate moistend with a 0.2% potassiun nitrate containing solution.
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