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Search Results: 1 - 10 of 392 matches for " Ossival Lolato;Iwamoto "
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Desempenho de bovinos em capim-tanzania adubado com nitrogênio ou consorciado com Estilosantes Performance of beef cattle grazing Tanzania grass fertilized with nitrogen or intercropped with Stylo
Ossival Lolato Ribeiro,Ulysses Cecato,Bruno Shigueo Iwamoto,Alyson Pinheiro
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: Com este estudo objetivou-se avaliar a massa seca de forragem e laminas foliares, ganho médio diário, taxa de lota o e ganho de peso vivo em capim-tanzania (Panicum maximum Jacq.) no período de novembro de 2008 a julho de 2009 sob lota o contínua. Utilizou-se delineamento experimental em blocos ao acaso em parcela subdivididas, com três repeti es, e como tratamentos: Tanzania + Estilosantes Campo Grande; Tanzania + 75kg/ha de N; Tanzania + 150kg/ha de N e Tanzania + 225kg/ha de N, e nas sub-parcelas os períodos do ano: primavera, ver o e outono. No ver o, a massa seca de forragem e laminas foliares foram superiores à primavera e outono. O tratamento com 225kg de N apresentou maior massa seca de forragem e massa seca de laminas foliares no ver o e outono. Obteve-se maior ganho médio diário no ver o. Na primavera e no ver o n o houve diferen a entre os tratamentos para o ganho médio diário, e no outono o tratamento com 225kg/ha de N foi superior. A taxa de lota o foi semelhante no ver o e outono, e menor na primavera. O tratamento com 225kg de N apresentou maior taxa de lota o na primavera e ver o. O tratamento com 225kg de N apresentou maior ganho de peso vivo no outono, na primavera e ver o o 150 kg de N foi semelhante. A disponibilidade de massa seca de forragem e o desempenho animal proporcionado pelo Estilosantes foram equivalentes à aduba o nitrogenada até a dose de 75kg de N. This study aimed to evaluate the dry mass of forage and leaf blade dry mass, average daily gain, stocking rate and live weight gain in Tanzania grass (Panicum maximum Jacq.) from November/2008 to July/2009, on continuous stocking. The experimental design was a split-plot arrangement in a randomized blocks design, with three replications and four treatments: Tanzania + Campo Grande Stylo; Tanzania + 75kg/ha of N; Tanzania + 150kg/ha of N and Tanzania + 225kg/ha of N, subplots were the seasons of the year: Spring, Summer and Autumn. The forage dry mass and leaf blade dry mass was higher in Summer compared to Spring and Autumn. The treatment with 225kg of N presented higher dry mass of forage and leaf blade dry mass in Summer and Autumn. It was obtained the higher average daily gain in the Summer. In the Spring and Summer no differences were observed for average daily gain, but in the Autumn the treatment with 225kg/ha of N was the best. The stocking rate was similar in Summer and Autumn, but lower in Spring. The treatment with 225kg of N presented the higher stocking rate in Spring and Summer. The treatment with 225kg of N presented the higher live weight gain in Autumn, w
Morphogenetic and tillering dynamics in Tanzania grass fertilized and non-fertilized with nitrogen according to season
Roma, Cláudio Fabrício da Cruz;Cecato, Ulysses;Soares Filho, Cecílio Viega;Santos, Geraldo Tadeu dos;Ribeiro, Ossival Lolato;Iwamoto, Bruno Shigueo;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300013
Abstract: the objectives of this study were to evaluate morphogenetic characteristics and tillering dynamics in tanzania grass fertilized and non-fertilized with nitrogen, under intermittent grazing, in the spring and the summer. the main plots were composed of four nitrogen rates (0, 100, 200 and 300 kg/ha) and the subplots were growth seasons: spring (october, november and december) and summer (january, february and march). the experimental design was of randomized block with plots subdivided by time (seasons of the year) and four replications. urea was used as nitrogen supply and was divided into two applications: one in the spring and another in the summer. the experimental units fertilized with n rates of 200 and 300 kg/ha showed six cycles of pasture, with an average of 27 days of pasture interval, while the treatments with no fertilization and 100 kg/ha of n showed only four and five cycles of pasture, respectively. leaf elongation rate (ler) and the leaf appearance rate (lar) increased linearly with increasing of n rates. the greatest population density occurred in summer with the higher nitrogen rates. the treatment without n fertilization showed the lowest growth of tiller population, while the other treatments exhibited growth rates above 50% when compared with non-fertilized samples. nitrogen rates significantly affect the leaf appearance rate and the leaf elongation rate, as well as the number of live leaves in plants of tanzania grass in both spring and summer.
Root biomass and organic reserves of coastcross intercropping or not with “Arachis pintoi”, with or without nitrogen, under grazing Biomassa radicular e reservas organicas em coastcross consorciada ou n o com "Arachis pintoi", com e sem nitrogênio, sob pastejo
Ossival Lolato Ribeiro,Ulysses Cecato,Augusto Manoel Rodrigues,Juliana Cantos Faveri
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: The aim of this study was to evaluate the non-structural carbohydrates and root biomass in pastures of Coastcross + Arachis pintoi; Coastcross + Arachis pintoi with 100kg/ha of nitrogen (N); Coastcross + Arachis pintoi with 200kg/ha of N; and Coastcross with 200kg/ha of N, in the seasons of winter, spring, summer and autumn. In the experimental was used a complete randomized block design with subdivided parcels, with two repetitions (blocks) was used. The use of nitrogen fertilization (100kg/ha) associated to the Arachis pintoi provided the highest content of non-structural carbohydrates (0,3942g/hg) in the roots and greater root biomass (0,4483kg/m3). The content of non-structural carbohydrates and the root biomass were higher in the summer and autumn. The concentration of 63%, 24 % and 13% of the root biomass occurred in the layer of 0 - 15; 15 - 30 and 30 - 45cm of the ground, however, it did not have difference in the root biomass between the treatments with or without intercropping, in the studied depths. The concentrations of the non-structural carbohydrates were similar in the different depths of the root. Objetivou-se neste trabalho avaliar a concentra o de carboidrato n o-estrutural e biomassa radicular em pastagens de grama Coastcross + Arachis pintoi; Coastcross + Arachis pintoi com 100kg/ha de nitrogênio (N); Coastcross + Arachis pintoi com 200kg/ha de N; e Coastcross com 200kg/ha de N, nos períodos de ver o, outono e inverno. Utilizou-se delineamento experimental em blocos ao acaso com os tratamentos em esquema de parcelas subdivididas, com duas repeti es (blocos). A utiliza o de aduba o nitrogenada (100kg/ha) associada ao Arachis pintoi proporcionou maior concentra o de carboidrato n o estrutural (0,3942g/hg) na raiz e maior biomassa radicular (0,4483kg/m3). A concentra o de carboidrato n o estrutural e a biomassa radicular foram elevadas no ver o e outono. A concentra o de biomassa radicular foi de 63%, 24% e 13% nas profundidades de 0 - 15, 15 - 30 e 30 - 45cm, entretanto, n o houve diferen a na biomassa radicular entre os tratamentos com e sem consorcia o, nas profundidades estudadas. As concentra es de carboidratos n o estruturais foram semelhantes nas diferentes profundidades das raízes.
Palm kernel cake from biodiesel production on Massai grass ensilage Torta de dendê oriunda da produ o do biodiesel na ensilagem de capim-massai
Ronaldo Lopes Oliveira,Ossival Lolato Ribeiro,Adriana Regina Bagaldo,Luciano dos Santos Lima
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: The experiment was conducted to evaluate the best level of inclusion of palm kernel cake in massai grass silage by chemical-bromatological, fermentation index and forage value of the silage analysis. The experiment was conducted at Experimental Farm of the School of Veterinary Medicine and Zootec. The treatments were composed by massai grass cut at 40 days, chopped and added to 8%, 16% and 24% of palm kernel cake and the cake without additional treatment. After mixing, the material was compressed in experimental silos, which were opened after 60 days. The experimental design was completely randomized, with four treatments and four replications. Data were analyzed by analysis of variance and regression. The addition of palm kernel cake improve the chemical-bromatological and fermentation index of massai grass silage, beyond increase the forage value of silage. The best level of inclusion of palm kernel cake was 24%, for provided the biggest content of dry matter, crude protein and ether extract, beyond provided the lower content of fibrous fractions and reduction of the values of pH and ammoniacal nitrogen. O experimento foi conduzido com o objetivo de avaliar o melhor nível de inclus o da torta de dendê na ensilagem de capim-Massai com base nos parametros químico-bromatológicos, fermentativos e índice de valor forrageiro. O experimento foi realizado na Fazenda Experimental da Escola de Medicina Veterinária e Zootecnia da Universidade Federal da Bahia. Os tratamentos foram compostos por capim-Massai cortado aos 40 dias, picado e acrescido de 8%; 16%; e 24% de torta de dendê com base na matéria natural, além do tratamento sem torta adicional. Após a mistura, o material foi compactado em silos experimentais, que foram abertos após 60 dias. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro tratamentos e quatro repeti es. Os dados foram analisados por meio de análise de variancia e regress o. A adi o da torta de dendê melhorou os padr es químico-bromatológicos e fermentativos da silagem de capim-Massai, bem como aumentou o índice de valor forrageiro desta. O melhor nível de inclus o da torta de dendê foi o de 24%, uma vez que propiciou os maiores teores de matéria seca, proteína bruta e extrato etéreo, bem como os menores teores da fra o fibrosa e redu o nos valores de pH e nitrogênio amoniacal.
Produ o de forragem e desempenho animal em pastagens de coastcross consorciada ou n o com Arachis pintoi, com e sem nitrogênio = Forage Production and Performance Animal in Coastcross Intercropping or not with Arachis pintoi, with or without Nitrogen
Ossival Lolato Ribeiro,Ulysses Cecato,Cláudio Fabrício da Cruz Roma,Juliana Cantos Faveri
Acta Scientiarum : Animal Sciences , 2008,
Abstract: O estudo objetivou avaliar a produ o de forragem e desempenho animal em pastagens de Coastcross + Arachis pintoi; Coastcross + Arachis pintoi com 100 kg ha-1 de N; Coastcross + Arachis pintoi com 200 kg ha-1 de N e Coastcross com 200 kg ha-1 de N, nas esta es de inverno, primavera, ver o e outono. Utilizou-se o delineamento experimentalem blocos ao acaso, com os tratamentos em parcelas subdivididas, com duas repeti es. Foram avaliados: acúmulo de massa de forragem e acúmulo diário de massa de forragem, ganho médio diário (GMD), ganho de peso vivo por área e taxa de lota o. A utiliza o de Coastcross + 200 kg ha-1 de N e as melhores condi es climáticas na primavera e ver o favoreceram tanto o acúmulo de massa de forragem (26.764 kg ha-1 de MS) quanto o acúmulo diário de massa de forragem (82 kg ha-1 por dia de MS). A utiliza o da associa o entre Arachis pintoi + 200 kg ha-1 de N e Coastcross + 200 kg ha-1 de N, possibilitou o melhor desempenho animal, com GMD de 0,570 e 0,500 kg e taxa de lota o de 3,51 e 3,26 UA ha-1, respectivamente. A utiliza o de pastagem consorciada sem a associa o com doses de nitrogênio (100 e 200 kg ha-1) n o favoreceu (p > 0,05) o acúmulo de massa de forrageme a taxa de acúmulo diária. A utiliza o de 200 kg ha-1 de N, com e sem a leguminosa, proporcionou o melhor desempenho e lota o animal por área. The objective of this study was to evaluate dry matter production and animal performance in pastures of Coastcross + Arachis pintoi; Coastcross + Arachis pintoi with 100 kg ha-1 of N; Coastcross +Arachis pintoi with 200 kg ha-1 of N and Coastcross with 200 kg ha-1 of N, during winter, spring, summer and autumn. The experimental design was complete randomized blocks with split-plot parcels, with two repetitions. The study evaluated the accumulation of foragemass and dairy accumulation of forage mass, average daily gain (ADG), live weight gain and stocking rate. The used of Coastcross + 200 kg ha-1 of N and the best climatic conditions in the spring and summer, favored the accumulation of forage mass (26,764 kg ha-1 of DM)and daily accumulation of forage mass (82 kg ha-1 day-1 of DM). The use of the association between Arachis pintoi + 200 kg ha-1 of N and Coastcross + 200 kg ha-1 of N, produces best animal performance, with ADG of 0.570 and 0.500 kg and stocking rate of 3,51 and 3.26AU ha-1, respectively. The use of pasture intercropping without association with doses of nitrogen (100 and 200 kg ha-1) did not favor (p > 0.05) the accumulation of forage mass and dairy accumulation of forage mass. The utlization of 200 kg ha
Efeitos de floculantes na concentra o de micro e macronutrientes em biofertilizante suíno = The effect of flocculants on the concentrations of micro and macronutrients in swine biofertilizer
Affonso Celso Gon?alves Júnior,Cleber Ant?nio Lindino,Ossival Lolato Ribeiro,Nilton Garcia Marengoni
Acta Scientiarum : Technology , 2008,
Abstract: O objetivo deste trabalho foi avaliar quimicamente as fases sólida e líquida de biofertilizante suíno, separadas com diferentes floculantes. O delineamento experimental foi inteiramente casualizado, com cinco tipos de floculantes, sendo cinco doses de cadafloculante, com cinco repeti es. A separa o foi efetuada por meio deflocula o/decanta o por 1h após a adi o do floculante. Realizou-se a caracteriza o química das fases sólida e líquida do biofertilizante, a partir da determina o de N, P, K, Ca, Mg, Cu, Zn, Fe e Mn. Na fase líquida, o objetivo de diminuir os macronutrientes foi atingido quando se utilizaram as doses 10 e 20 mL da combina o entre calcário dolomítico + hidróxido de cálcio, e os micronutrientes foram reduzidos quando foram utilizados os floculantes sulfato de alumínio e hidróxido de cálcio + sulfato de alumínio. The objective of this work was to chemically evaluate the solid liquid phases of swine biofertilizer separated by different flocculants. The experimental design was completely randomized, with five kinds of flocculants and five doses of each flocculant, with five repetitions. The separation was conducted through flocculation/decantation for an hour after the addition of each flocculent. The chemical characterization was done on the solid and liquid biofertilizer phases from the determination of the following elements: N, P, K, Ca, Mg, Cu, Zn, Fe and Mn. For the liquid phase, the purpose of decreasing macronutrients was achieved using the doses of 10 and 20 mL of the combination between the flocculants dolomitic limestone + calcium hydroxide, and micronutrients reduction occurred when the flocculants aluminum sulfate and calcium hydroxide + aluminum sulfate were used.
Produtividade do milho em resposta a aduba??o com NPK e Zn em argissolo vermelho-amarelo eutrófico e latossolo vermelho eutroférrico
Gon?alves Júnior, Affonso Celso;Trautmann, Ricardo Robson;Marengoni, Nilton Garcia;Ribeiro, Ossival Lolato;Santos, Alexandre Leseur dos;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000400043
Abstract: it's with the purpose of evaluating the production components and the corn crop productivity due fertilization with different doses of zn (zinc) an npk (nitrogen, phosphorus and potassium), this research has been done over the municipalities of palotina-pr, on eutrophic red-yellow argissol and marechal candido rondon - pr, on red eutroferric latossol. the treatments were arranged on a factorial scheme 3x3 constituting three doses of fertilization npk: no fertilization, once (30-100-50 kg ha-1) and twice the fertilization recommended (60-200-100 kg ha-1), based on the soil analysis. another factor under studying was the zn in different doses: 0,0; 5,0 and 10,0 mg dm-3. such parcels were corresponded to 3,6 m width by 6 m length. it were sowed 4 spaced lines with 0,9 m, using as a useful parcel the 2 central lines discarding 1,5 m of edging. the plant population was about 6,5 seeds by linear meter. considering the npk fertilization it was gotten a considerably increase for the components of seeds number, 1000 seeds mass and the productivity, being the dose 60 - 200 - 100 kg ha-1 the one that has given the best results on red eutroferric latossol and on eutrophic red-yellow argissol that has given a considerably increase on the 1000 seeds and productivity. according to the fertilization with zn, it has not given a considerably increase on both soils among the treatments for the evaluated components and productivity. with this word it can be concluded that the fertilization with npk increased the crop productivity on both soils while the fertilization with zn differences were not gotten over corn crop productivity.
One Step Formation of Propene from Ethene or Ethanol through Metathesis on Nickel Ion-loaded Silica
Masakazu Iwamoto
Molecules , 2011, DOI: 10.3390/molecules16097844
Abstract: Increased propene production is presently one of the most significant objectives in petroleum chemistry. Especially the one-step conversion of ethene to propene (ETP reaction, 3C2H4 ? 2C3H6) is the most desired process. In our efforts, nickel ion-loaded mesoporous silica could turn a new type of ETP reaction into reality. The one-step conversion of ethene was 68% and the propene selectivity was 48% in a continuous?gas-flow system at 673 K and atmospheric pressure. The reactivity of lower olefins and the dependences of the ETP reaction on the contact time and the partial pressure of ethene were consistent with a reaction mechanism involving dimerization of ethene to 1-butene, isomerization of 1-butene to 2-butene, and metathesis of 2-butene and ethene to yield propene. The reaction was then expanded to an ethanol-to-propene reaction on the same catalyst, in which two possible reaction routes are suggested to form ethene from ethanol. The catalysts were characterized mainly by EXAFS and TPR techniques. The local structures of the nickel species active for the ETP reaction were very similar to that of layered nickel silicate, while those on the inert catalysts were the same as that of NiO particles.?
LHC SUSY searches after the Higgs discovery: respecting the muon g-2
Iwamoto, Sho
High Energy Physics - Phenomenology , 2013,
Abstract: SUSY searches at the LHC as well as the 126 GeV Higgs boson indicate that superparticles, especially squarks and gluinos, are not so light as we expected. It is important to investigate SUSY searches which do not rely on the colored superparticles. As a clue for the investigation, we focus on the muon g-2 anomaly, which can be explained by the SUSY contributions if some of neutralinos, charginos, and sleptons are as light as of order 100 GeV. We propose the muon-(g-2)-motivated MSSM as a benchmark model, where squarks are decoupled but the superparticles corresponding to the muon g-2 are light enough to explain the anomaly. We also interpret the up-to-date results of LHC SUSY searches, and obtain experimental constraints on the model. We show searches for direct production of charginos and neutralinos work very well against the scenario, but several regions are not only remain uncovered but even found challenging to be searched for at the LHC. It is ascertained that, in order to draw out latent potential of the LHC, strategies to attack these regions should be developed.
On the Radio-to-X-ray light curves of SN 1998bw and GRB 980425
K. Iwamoto
Physics , 1998, DOI: 10.1086/311867
Abstract: We calculate radio-to-X-ray light curves for afterglows caused by non-thermal emission from a highly relativistic blast wave, which is inferred from the gamma-ray flux detected in GRB 980425 and from the very bright radio emission detected in SN 1998bw. We find that the observed gamma-ray and radio light curves are roughly reproduced by the synchrotron emission from a relativistic fireball. The optical flux predicted for the non-thermal emission is well below that of the thermal emission observed for SN 1998bw so that it will not be seen at least for a few years. The model predicts the X-ray flux just above the detection limit of BeppoSAX for the epoch when it was pointed to the field of GRB980425. Therefore, the nondetection of X-ray and optical afterglows is consistent with the model. The models presented here are consistent with the physical association between SN 1998bw and GRB980425, and lend further support to the idea that this object might correspond to an event similar to the ``hypernova'' or ``collapsar'' -- events in which the collapse of a massive star forms a rotating black hole surrounded by a disk of the remnant stellar mantle.
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