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Search Results: 1 - 10 of 15794 matches for " Ildeu Matias do Nascimento "
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EFFECT OF SOME SYSTEMIC DRUGS IN THE PREVENTIVE CONTROL OF THE MAL-DO-PANAMá (Fusarium oxysporum f.sp. cubense (EF.) SN. & H.) OF THE BANANA TREE (Musa sapientum L.) EFEITOS DE ALGUMAS DROGAS SISTêMICAS NO CONTROLE PREVENTIVO DO MAL DO PANAMá (Fusarim oxysporum f. sp. Cubense (Ef.) Sn. & H.) DA BANANEIRA (Musa sapientum L.)
Yvo de Carvalho,Lincoln Fonseca Zica,Ildeu Matias do Nascimento
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v5i1.2197
Abstract: With the objective of studying the effect of some systemic drugs on the fungus, Fusarium oxysporim f. sp. cubense (Ef.) Sn. & H. , which attacks the rootstalk tissue of the cultivated ‘Ma ’ banana (Musa sapientum L.) an experiment was set up in virgin “cerrado” soil , which had been previously covered with natural vegetation. The effects of Benlate (benomyl) and Plantvax (oxamyl), both in doses of 0.1, 0.2, and 0.5%, as well as Mycostatin (nistatina) in doses of 0.02, 0.05, and 0.1%, and combination of Mycostatin plus soluble Neantina (chloride of metoxi-etil mercurio at 3.7%) in doses of 0.02 + 0.15%, 0.05 + 0.3%, and 0.1 + 0.5%, were tested by immersing the infected roostalks in the solutions for a ten-minute period. The rootstalks used had been naturally infected by the fungus. The experiment design used was randomized blocks with four (4) repetitions of twenty-six (26) treatments. Each parcel was composed of four (4) plants. The results observed in February of 1974 revealed an indiscriminate incidence of the ";Mal do Panamá” on the plants of all treatments, demonstrating that none of them was sufficiently effective in erradicating the pathogen established in the rootstalk tissues. It is suggested, because of root damage and the subsequent inadequate penetration by the fungicides, that this lack of absorption was responsible for the unsuccessful attempts at controlling the disease. It was concluded that the control of this disease is neither possible nor viable under the conditions in which the experiment was executed, using the above-mentioned method of fungicide application and preparation of the rootstalk. Changes in procedure are recommended for future experiments. Com o objetivo de estudar o efeito de algumas drogas sistêmicas sobre o fungo Fusarium oxysporim f. sp. cubense (Ef.) Sn. & H. em tecido de rizoma de bananeira do cultivar Ma (Musa sapientum L.) foi montado um experimento em solo sob cerrado, anteriormente coberto por vegeta o natural. Testou-se o efeito do Benlate (benomyl) e do Plantvax (oxamyl), ambos nas doses de 0,1, 0,2 e 0,5%, do Mycostatin (nistatina) nas doses de 0,02, 0,05 e 0,1% e da combina o Mycostatin + Neantina solúvel (cloreto de metoxi-etil mercúrio 3,7%) nas dosagens de 0,02 + 0,15%, 0,05 + 0,3% e 0,1 + 0,5% em banho de imers o dos rizomas Infectados por um período de 10 minutos. Foram usados rizomas com infec o natural pelo patógeno. O delineamento experimental usado foi a casualiza o completa, com 26 tratamentos e 4 repeti es. Cada parcela foi constituída de 4 plantas (covas). Os resultados observados em fev
NíVEIS DE FóSFORO E CALAGEM PARA SOJA E EFEITO RESIDUAL NO ARROZ, EM SOLOS DE CERRADO DO ESTADO DE GOIáS PHOSPHORUS AND LIME LEVELS FOR SOYBEANS AND RESIDUAL EFFECT IN RICE IN “CERRADO” SOILS OF THE STATE OF GOIáS
Gil Santos,Ildeu Matias do Nascimento,Raimundo J. M. da Silva,Allert R. Suhet
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v7i1.2268
Abstract: No presente trabalho s o apresentados os resultados de experimentos de campo sobre níveis de fósforo e calagem, com a cultura da soja, em nove localidades do Estado de Goiás, e do efeito residual da aduba o em cinco destas localidades com o plantio do arroz. Houve efeito linear do fósforo em sete dos experimentos com soja, efeito quadrático deste elemento em um deles e da intera o fósforo calcário em outro. Nos experimentos com arroz, houve efeito linear do fósforo residual em três localidades e quadrático do calcário em uma. As melhores produ es de soja e arroz foram 1,9 vezes mais altas que as médias de produ o destas culturas no Brasil em 1969, apesar da estiagem prolongada. In this study are presented the results of the field experiments of phosphorous and lime levels in soybean (Glicine max. L. Merril) crops. which were planted in nine locations in the state of Goiás. It was also studied the effect of fertilizer in five of these locations on the subsequent rice crops. There was a linear effect of phosphorous in seven of the soybean experiments, with a quadratic effect of this same element in another experiment. In the rice experiments, there was a linear effect of residual phosphorous in three of the locations and a quadratic effect of calcium in one location. The best production of soybeans and rice was 1.9 times higher than the average production of these crops in Brazil in 1969, despite of a severe drought. The profit was calculated along with the relationship between the increase in value of the crops and the cost (fertilizer and lime) of producing this increase. The extra cost was justified in six places, mainly in the places where rice was planted during the second year.
NíVEIS DE FóSFORO E CALAGEM PARA AMENDOIN E FEIJ O E EFEITO RESIDUAL NO ARROZ EM SOLOS DE CERRADO DE GOIáS PHOSPHORUS AND LIME LEVELS FOR PEANUTS AND COMMON BEANS AND THE RESIDUAL EFFECT IN RICE IN CERRADO SOILS OF THE GOIáS STATE
Ildeu Matias do Nascimento,Gil Santos,Raimundo J. M. da Silva,Albert Rosa Suhet
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v5i1.2210
Abstract: No presente trabalho s o apresentados os resultados de experimentos de campo, sobre níveis de fósforo e calagem com o feij o após crotalária, e sobre efeito residual da aduba o na cultura do arroz, em cinco localidades do Estado de Goiás. Houve efeito linear do fósforo em dois experimentos com amendoim e em um com feij o. Nos experimentos de efeito residual com arroz houve efeito linear do fósforo em dois e efeito linear do calcário e da intera o fósforo calcário em um. Apesar da estiagem prolongada, foram alcan adas produ es razoáveis (amendoim 1,5 vezes; feij o 1,9 vezes e arroz 2,3 vezes as produ es médias do Brasil em 1969, respectivamente). Calcularam-se o lucro e a rela o entre o valor do aumento da produ o e o custo dos tratamentos (adubo e corretivo) havendo compensa o em três das cinco localidades. In this study, the results of the field experiments of phosphorus and lime levels on peanuts (Arachis hypogea L.) and dry beans (Phasealus vulgaris L.) after crotalaria juncea and of the subsequent rice crop, at five locations in the State of Goiás, are presented. There was a linear effect of phosphorus in two experiments on peanuts and in one experiment on dry beans. In the experiments testing residual effect on rice, there was a linear effect of phosphorus in two experiments and a linear effect of lime and interaction of phosphorus and lime in a third. Even though there was a severe drought, reasonable yields were reached. The results showed peanuts at 1.5, dry beans at 1.9, and rice at 2.3 times the average yields for Brazil in 1969. The profits were determined along with the relationship between the increase in value of the crop and the cost of producing the increase. It was determined that the cost of the treatments (Fertilizer and lime), which produced this increase, was justified at three of the five locations.
ENSAIO DE CAMPO VISANDO AO CONTROLE DA LAGARTA ROSADA DO ALGODOEIRO Pectinophora gossypiella (Saund. 1844) CHEMICAL CONTROL OF COTTON PINK BOLLWORM (Pectinophora gossypiella SAUND., 1844) WITH A NEW INSECT GROWTH REGULATOR
Ant?nio Lopes da Silva,Ildeu Matias do Nascimento,Leonardo Barros de Macêdo,Renato Vargas Pereira
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v27i2.2963
Abstract: Foi conduzido em 1995/96, na área experimental da Escola de Agronomia da Universidade Federal de Goiás, um experimento objetivando o controle da lagarta rosada do algodoeiro Pectinophora gossypiella utilizando o chlorfluazuron CE, um produto fisiológico sintético, nas doses de 25,0, 37,5 e 50,0 g de ingrediente ativo (i.a.) por hectare, comparado com Deltamethrina CE na dose de 12,5 g i.a./ha e Cypermetrina CE na dose de 50,0 g i.a./ha e uma testemunha. Os dados obtidos permitiram concluir que Deltamethrin CE e Cypermetrina CE, nas citadas dosagens, foram altamente eficientes no controle da lagarta rosada do algodoeiro, enquanto o Chlorfluazuron CE, nas três dosagens testadas, efetivamente, n o controlou a praga em quest o. PALAVRAS-CHAVE: Inseto; Gossypium hirsutum; controle de pragas; Pectinophora gossypiella; insecta. A trial to control the pink bollworm (Pectinophora gossypiella), using a new insect growth regulator was carried out in Goiania, Goiás, Brazil. The Chlorfluazuron CE at 25, 37.5 and 50.0 g a.i./ha was compared to Deltamethrin CE at 12.5 g a.i./ha and Cypermethrin CE at 50.0 g a.i./ha, plus an untreated check. Data show that Deltamethrin CE and Cypermethrin CE at the tested dosages were efficient in controlling the pink bollworm, and Chlorfluazuron CE in the three tested dosages did not control the pink bollworm efficiently. KEY-WORDS: Gossypium hirsutum; Pectinophora gossypiella; insecta; pest control.
UTILIZATION OF THE BEFENTHRIN IN CHEMICAL CONTROL OF WHITE FLY (Bemisia tabaci, Genn. 1889) IN BEAN CROPS AVALIA O DO BEFENTHRIN NO CONTROLE DA MOSCA BRANCA (Bemisia tabaci, Genn. 1889) EM FEIJOEIRO
Ant?nio Lopes da Silva,Valquíria Rocha dos Santos Veloso,Ildeu Matias do Nascimento,Jaison Pereira de Oliveira
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v23i1.2623
Abstract: The white fly (Bemisia tabaci), an important pest of bean crops, is known as vector of golden-yellow-mosaic virus in many regions in Brazil. In order to determine the efficiency of the befenthrin to control the white fly, a field experiment was carried out in Goiania, State of Goiás, Brazil. The treatments and dosage in grams of active ingredient by ha were: befenthrin (2.5; 3.75; 5.0 and 6.25), metamidophós (420.0 and 600.0) and untreated check. Results obtained by this test permitted to conclude that befenthrin at experimented doses, presented similarity of control to the other used compound in different estimations realized, with control average superior to 96.0%. Com o objetivo de avaliar a eficiência do Befenthrin 25 CE, nas dosagens de 2,5 ; 3,75; 5,00 e 6,25g i.a/ha, no controle químico da mosca branca (Bemisia tabaci Genn., 1889) em feijoeiro, foi conduzido um experimento no Campo Experimental da Escola de Agronomia da Universidade Federal de Goiás - Goiania, safra 91/92, utilizando como produto padr o o Metamidophós 600 BR nas dosagens de 420 e 600g i.a/ha. As pulveriza es foram realizadas nos 7°, 14°, 21° e 28° dias após a emergência das plantulas, utilizando-se um pulverizador costal a CO2 com bico D3 gastando-se 250 litros de calda por ha. Dois dias após a última pulveriza o foi realizada a avalia o de eficiência, contando-se o número de ninfas vivas em 10 folíolos/parcela e, 10 dias após, fez-se a contagem do número de plantas com sintomas de “mosaico dourado” por parcela. Pelos resultados obtidos, conclui-se que o Befenthrin nas dosagens de 5,0 e 6,25g i.a./ha controlou eficientemente a praga, igualando-se ao metamidophós na dosagem de 600g i.a/ha, com a vantagem de menor toxicidade para mamíferos e também sob o ponto de vista ecológico, pois a dose utilizada i.a, é 100 vezes menor.
A Model for the Characterization and Selection of Beeswaxes for Use as Base Substitute Tissue in Photon Teletherapy  [PDF]
Rogério Matias Vidal, Divanízia do Nascimento Souza
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.34032
Abstract: This paper presents a model for the characterization and selection of beeswaxes for use as base substitute tissue for the manufacture of objects suitable for external radiotherapy using megavoltage photon beams. The model of characterization was divided into three distinct stages: 1) verification of aspects related to the origin of the beeswax, the bee species, the flora in the vicinity of the beehives and procedures to detect adulterations; 2) evaluation of physical and chemical properties; and 3) evaluation of beam attenuation capacity. The chemical composition of the beeswax evaluated in this study was similar to other simulators commonly used in radiotherapy. The behavior of the mass attenuation coefficient in the radiotherapy energy range was comparable to other simulators. The proposed model is efficient and enables convenient assessment of the use of any particular beeswax as a base substitute tissue for radiotherapy.
Effect of Lectins from Diocleinae Subtribe against Oral Streptococci
Theodora Thays Arruda Cavalcante,Bruno Anderson Matias da Rocha,Victor Alves Carneiro,Francisco Vassiliepe Sousa Arruda,Ant?nia Samia Fernandes do Nascimento,Nairley Cardoso Sá,Kyria Santiago Do Nascimento,Benildo Sousa Cavada,Edson Holanda Teixeira
Molecules , 2011, DOI: 10.3390/molecules16053530
Abstract: Surface colonization is an essential step in biofilm development. The ability of oral pathogens to adhere to tooth surfaces is directly linked with the presence of specific molecules at the bacterial surface that can interact with enamel acquired pellicle ligands. In light of this, the aim of this study was to verify inhibitory and antibiofilm action of lectins from the Diocleinaesubtribe against Streptococcus mutans and Streptococcus oralis. The inhibitory action against planctonic cells was assessed using lectins from Canavaliaensi formis (ConA), Canavalia brasiliensis (ConBr), Canavalia maritima (ConM), Canavalia gladiata (CGL) and Canavalia boliviana (ConBol). ConBol, ConBr and ConM showed inhibitory activity on S. mutans growth. All lectins, except ConA, stimulated significantly the growth of S. oralis. To evaluate the effect on biofilm formation, clarified saliva was added to 96-well, flat-bottomed polystyrene plates, followed by the addition of solutions containing 100 or 200 μg/mL of the selected lectins. ConBol, ConM and ConA inhibited the S. mutans biofilms. No effects were found on S. oralis biofilms. Structure/function analysis were carried out using bioinformatics tools. The aperture and deepness of the CRD (Carbohydrate Recognition Domain) permit us to distinguish the two groups of Canavalia lectins in accordance to their actions against S. mutans and S. oralis. The results found provide a basis for encouraging the use of plant lectins as biotechnological tools in ecological control and prevention of caries disease.
Effects of different sampling intervals on apparent protein and energy digestibility of common feed ingredients by juvenile oscar fish (Astronotus ocellatus)
Nascimento, Thiago Matias Torres do;Fabregat, Thiago El Hadi Perez;Rodrigues, Laurindo André;Sakomura, Nilva Kazue;Fernandes, Jo?o Batista Kochenborger;
Acta Scientiarum. Animal Sciences , 2012, DOI: 10.4025/actascianimaci.v34i2.10541
Abstract: this study evaluated the apparent protein and energy digestibility of common feed ingredients (soybean meal, fish meal, wheat meal and corn) by juvenile oscars using two different sampling intervals (30 min. and 12h). the 160 juvenile oscar fish tested (22.37 ± 3.06 g bw) were divided into four cylindrical plastic net cages, each one placed in a 1000 l feeding tank. the experiment was completely randomized in a 2 x 4 factorial design (2 feces collection intervals and 4 feed ingredients) with four replications. the statistical tests did not detect an interaction effect of sampling interval and type of ingredient on digestibility coefficients. sampling interval did not affect protein and energy digestibility. the physical characteristics of juvenile oscar feces likely make them less susceptible to nutrient loss by leaching and can therefore be collected at longer intervals. protein digestibility of the different ingredients was similar, showing that apparent digestibility of both animal and plant ingredients by juvenile oscars was efficient. energy digestibility coefficients of fish meal and soybean meal were higher than those of wheat meal and corn. carbohydrate-rich ingredients (wheat meal and corn) had the worst energy digestibility coefficients and are therefore not used efficiently by juvenile oscars.
Lectin from Canavalia brasiliensis Seeds (ConBr) Is a Valuable Biotechnological Tool to Stimulate the Growth of Rhizobium tropici in Vitro
Mayron Alves de Vasconcelos,Claudio Oliveira Cunha,Francisco Vassiliepe Sousa Arruda,Victor Alves Carneiro,Fabio Martins Mercante,Luiz Gonzaga do Nascimento Neto,Giselly Soares de Sousa,Bruno Anderson Matias Rocha,Edson Holanda Teixeira,Benildo Sousa Cavada,Ricardo Pires dos Santos
Molecules , 2012, DOI: 10.3390/molecules17055244
Abstract: To study the interactions between a Rhizobium tropici strain and lectins isolated from the seeds of Canavalia ensiformis (ConA) and Canavalia brasiliensis (ConBr), a lectin fluorescence assay was performed. In addition, an experiment was designed to evaluate the effect of the two lectins on bacterial growth. Both lectins were found to bind to R. tropici cells, but the interactions were inhibited by D-mannose. Interestingly, only ConBr stimulated bacterial growth in proportion to the concentrations used (15.6–500 μg/mL), and the bacterial growth stimulation was inhibited by D-mannose as well. Structure/Function analyses by bioinformatics were carried out to evaluate the volume and carbohydrate recognition domain (CRD) configuration of ConA and ConBr. The difference of spatial arrangement and volume of CRD may indicate the variation between biological activities of both lectins. The results suggest that ConBr could be a promising tool for studies focusing on the interactions between rhizobia and host plants.
Termografia infravermelha em tempo real como método de avalia??o da viabilidade do ba?o em modelo de esplenectomia parcial em porcos
Ribeiro, Hugo Daniel Welter;Silva, Gustavo Ant?nio Pereira da;Brioschi, Marcos Leal;Nascimento, Aguinaldo José do;Biondo-Sim?es, Maria de Lourdes Pessole;Matias, Jorge Eduardo Fouto;
Revista do Colégio Brasileiro de Cirurgi?es , 2009, DOI: 10.1590/S0100-69912009000500013
Abstract: objective: to determine if infrared thermography is capable of precisely detecting loss of tissue perfusion in the spleen during a partial splenectomy. methods: five landrace pigs, weighing between 12 and 15 kg, after intramuscular pre-anesthetic medication and intravascular infusion anesthesia, were submitted to four sequential vascular interruption steps of the arterial vessels to the lower splenic pole: 1-vessels of splenic ligament; 2-splenic artery branch to the lower pole; 3-arterial branch to the lower pole on the organ visceral surface; 4-splenic parenchyma, splitting the organ. the images were captured by a therma cam sc500 camera 50 centimeters from the organ surface. the parenchymal temperatures were measured from the proximal (irrigated) areas and from the distal (ischemic) areas in three distinct circle regions of each area using sat report software, before and after each vessels interruption step, establishing five groups of measurement times: time 0 = before interruption step 1; time 1 = after interruption step 1; time 2 = after interruption step 2; time 3 = after interruption step 3; time 4 = after interruption step 4. results: proximal area temperatures (preserved vessels) remained stable during all the vessel interruption steps. the temperature of the distal area (compromised vessels), as compared to the proximal area, dropped continually throughout the sequential interruption steps and became statistically lower after interruption step 3 (time 3). there was a statistical difference between the proximal and distal temperatures of the organ as the vascular structures were being interrupted in each step. conclusion: infrared thermography is capable of precisely distinguishing irrigated splenic parenchyma from the ischemic areas and can contribute to the evaluation of solid organ viability.
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