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Search Results: 1 - 10 of 16410 matches for " Leandro Martins;Galbeiro "
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Produ??o de novilhas de corte em pastagem de Coastcross-1 consorciada com Arachis pintoi com e sem aduba??o nitrogenada
Paris, Wagner;Cecato, Ulysses;Branco, Antonio Ferriani;Barbero, Leandro Martins;Galbeiro, Sandra;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000100016
Abstract: this trial was carried out to evaluate forage mass (fm), daily accumulation rate (dar), forage offer (fo), stocking rate (sr), arachis pintoi percentage (app), average daily gain (adg) and gain per hectare (gph) of beef heifers under grazing in coastcross-1 and arachis pintoi mixed pasture during different seasons, from july 2003 to june 2004. the treatments were: ca0 = coastcross + arachis pintoi without n; ca100 = coastcross + arachis pintoi with 100 kg of n; ca200 = coastcross + arachis pintoi with 200 kg of n; and c200 = coastcross with 200 kg of n, distributed in a randomly block design, with two repetitions. pasture management was done through continuous grazing with variable stocking rate, using crossbred heifers with three test animals per treatment. the fm was 2641, 2431, 2760 and 2704 kg of dm/ha for ca0, ca100, ca200 and c200, respectively. treatments presented similar dar (66.12 kg of dm/ha) between pastures, with higher production in the summer, followed by spring and autumn, which were not different from each other, and the winter with the lowest value: 108.6; 71.7; 54.2; 30.6 kg of dm/ha, respectively. in the ca0 treatment, the highest fo and the lowest sr were obtained (4.0 au/ha). the highest sr and lowest fo were observed in treatments with nitrogen fertilization, without difference among them. the app in the mixture was higher in the spring, and for the ca0 treatment, with visual estimations were always higher in function of the lower dry matter percentage of this legume. for adg was higher for ca200 and c200 treatments in relation to ca100 and ca0 with values of 0.51, 0.51, 0.42 and 0.38 kg/day, respectively. the gph were above 1000 kg/ha/year and the summer presented the highest gain (221.4 kg/ha).
Concentra??es e quantidades de macronutrientes na excre??o de animais em pastagem de capim-momba?a fertilizada com fontes de fósforo
Rodrigues, Augusto Manoel;Cecato, Ulysses;Fukumoto, Nelson Massaru;Galbeiro, Sandra;Santos, Geraldo Tadeu dos;Barbero, Leandro Martins;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000600006
Abstract: the objective of this experiment was to evalute the effects of phosphorus sources (yoorin?, ordinary superphosphate (ss) + triple superphosphate (ts) and control) on the concentration and amount of n, p, k, and ca in the excreta of crossbred steers under grazing conditions on momba?a grass (panicum maximum jacq. cv. momba?a) pasture. the grazing method was the continuous stocking with variable stocking rate, and the animals used were crossbred with average live weight of 300 kg. it was used a complete randomized design in split plot with four replications. urine production and k concentration were high for animals grazing on yoorin fertilized pastures compared to other treatments; urine production ranged from 7.2 to 20.4 l/animal/day and k urine concentration ranged from 180 to 310 g/l. animals grazing on the control and ss + ts treatments presented greater n and p urine concentration than the ones grazing on yoorin fertilized pastures, ranging from 154 to 195 g n/l and 0.2 to 0.29 g p/l, respectively. average n and k amount excreted via urine was greater for animals grazing on yoorin and ss + ts treatments compared to control treatment, ranging from 51 to 99 g n/animal/dia and 46 to 49 g k/animal/dia, respectively. average ca concentration and p and ca amount excreted via urine were similar among treatments. average fecal production and n, k, ca concentrations and amounts were similar among treatments. average p amount was greater for ss + ts and yoorin treatments compared to the control, ranging from 7.5 to 11.6 g p/animal/day. nutrient return via animal excreta contributed in the experimental period with 73, 87, 6, and 28 kg/ha of n, k, p, and ca, respectively. animals on yoorin fertilized pastures presented greater urine production and greater k urine concentration and amount.
Mortalidade materna de mulheres negras no Brasil
Martins, Alaerte Leandro;
Cadernos de Saúde Pública , 2006, DOI: 10.1590/S0102-311X2006001100022
Abstract: every minute a woman dies in the world due to labor or complications of pregnancy. maternal mortality is a public health problem in brazil and affects the country's various regions unequally. researchers agree that maternal death occurs mainly in women with lower income and less schooling. the racial issue emerges in the midst of socioeconomic issues. the analysis is hampered by the difficulty in understanding brazil's official classification of race/color, which often impedes recording this information. various maternal mortality committees are applying the color item and reviewing their data. the current article analyzes various maternal mortality committee reports, showing that the risk of maternal mortality is greater among black women (which encompasses two census categories, negra, or black, and parda, or brown), thus representing a major expression of social inequality. the article concludes with a review of political and technical recommendations to decrease maternal mortality.
Produ??o de etilenoglicóis e derivados por rea??es catalíticas do óxido de eteno
Martins, Leandro;Cardoso, Dilson;
Química Nova , 2005, DOI: 10.1590/S0100-40422005000200018
Abstract: products resulting from the ethoxylation of hydroxylated compounds, especially water and ethanol, are of great commercial importance. this work presents several aspects concerning the catalytic reactions of ethylene oxide, a chemical substance used in the production of a wide variety of products. mechanisms of ethoxylation, distribution of products, formation of undesired by-products and perspectives for new processes using heterogeneous catalysis are also reviewed and discussed.
Aplica??o catalítica de peneiras moleculares básicas micro e mesoporosas
Martins, Leandro;Cardoso, Dilson;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000200028
Abstract: catalysis by solid acids has received much attention due to its importance in petroleum refining and petrochemical processes. relatively few studies have focused on catalysis by bases and even les on using basic molecular sieves. this paper deals with the potential application of micro and mesoporous molecular sieves in base catalysis reactions. the paper is divided in two parts, the first one dedicated to the design of the catalysts and the second to some relevant examples of catalytic reactions, which find a huge field of applications essentially in the synthesis of fine chemicals. here, recent developments in catalysis by basic molecular sieves and the perspectives of applications in correlated catalytic processes are described.
A reciprocidade nos contratos: uma análise expressivista
Zanitelli, Leandro Martins;
Revista Direito GV , 2011, DOI: 10.1590/S1808-24322011000100009
Abstract: this paper tries to establish why the law of contracts should express the value of reciprocity. although scholars have intensively discussed equality in exchange and the prohibition of unfair terms in contracts, few attention has been paid to the questions of knowing if and why it matters that the value of reciprocity be incorporated to the expressive content of contract law, that is, that the law, through the regulation of contractual activity, makes clear its adhesion to the value of reciprocity as equality in exchange or denying of exploitation of one of the parties by the other. the paper argues that the legal expression of the value of reciprocity - which may take place through either a general principle of contractual equality or more specific requirements, as such that of complying with the mean price (or “market price”) or that of not establishing certain clauses - is important for two kinds of reasons. first, the expression by the law of the value of reciprocity should be deemed important because the expressive content of the law is intrinsically important. in the case of reciprocity, it is argued that the law, as it manifests the wish that there be some correspondence between the sacrifice made and the advantage obtained by each party, ends up proclaiming, indirectly, the more basic values of equality and fraternity. second, the legal expression of the value of reciprocity is important in face of its consequences. these consequences are not circumscribed to the ones coming from limits imposed to the freedom of the contractual parties or to the refusal of the courts to enforce unfair contracts, since the legal endorsement of the value of reciprocity may influence the reasons for acting of the contractual parties. as a result, instead of acting only in order to maximize her own gain, each party may include the protection of the interests of the other one among the reasons of her decisions. this paper was organized as follows. after the introduction, which co
Aplica o catalítica de peneiras moleculares básicas micro e mesoporosas
Martins Leandro,Cardoso Dilson
Química Nova , 2006,
Abstract: Catalysis by solid acids has received much attention due to its importance in petroleum refining and petrochemical processes. Relatively few studies have focused on catalysis by bases and even les on using basic molecular sieves. This paper deals with the potential application of micro and mesoporous molecular sieves in base catalysis reactions. The paper is divided in two parts, the first one dedicated to the design of the catalysts and the second to some relevant examples of catalytic reactions, which find a huge field of applications essentially in the synthesis of fine chemicals. Here, recent developments in catalysis by basic molecular sieves and the perspectives of applications in correlated catalytic processes are described.
Valor nutritivo do capim-Tanzania (Panicum maximum Jacq. cv. Tanzania-1) pastejado em diferentes alturas
Cano, Clovenilson Cláudio Perissato;Cecato, Ulysses;Canto, Marcos Weber do;Santos, Geraldo Tadeu dos;Galbeiro, Sandra;Martins, Elias Nunes;Mira, Rodrigo Távora;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000800006
Abstract: crude protein (cp), neutral detergent fiber (ndf), acid detergent fiber (adf), phosphorus (p), potassium (k), calcium (ca), magnesium (mg) and in vitro dry matter digestibility (ivdmd) contents were assessed in the leaf blade and stem + leaf sheath fractions of tanzaniagrass (panicum maximum jacq. cv. tanzania-1) managed at four sward heights (20, 40, 50 and 65 cm). the grazing method was the continuous stocking and variable stocking rate, and used nelore steers with an average weight of 340 kg. the completely randomized experimental design was used with two replications, and five evaluations were performed during a period of 112 days. the cp, ivdmd, ca, p and mg contents decreased while ndf, adf and k concentrations increased in the leaf blade and stem + leaf sheath fraction in response to grazing height as well as period of evaluation. leaf blades exibited higher quality than stem + leaf sheath regardless of grazing height and evaluation time. tanzaniagrass grazed to 40 and 50 cm presents good chemical composition and ivdmd.
Prepara??o e propriedades de zeólitas faujasita contendo cátions am?nio
Almeida, Karina Arruda;Cardoso, Leandro Martins e Dilson;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000500013
Abstract: sodium faujasite zeolites with si/al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. the influence of framework aluminum and ion exchange degree in their basic properties were evaluated. these properties were assessed in the knoevenagel catalytic condensation. the sodium ion exchange was restricted to the supercavity and the exchange degree depended on the cation volume and on the si/al ratio. the higher catalytic activity is achieved for the zeolite with the lower si/al ratio exchanged with the monomethylammonium cation. the best performance of this catalyst is attributed to the higher basicity in combination with elevated micropore volume.
Anticoagulantes e bloqueios espinhais
Chaves, Itagyba Martins Miranda;Chaves, Leandro Fellet Miranda;
Revista Brasileira de Anestesiologia , 2001, DOI: 10.1590/S0034-70942001000300006
Abstract: background and objectives: the use of anticoagulants for thromboprophylaxis has increased the incidence of spinal blockades hematomas. this review aimed at checking the incidence of spinal hematomas and its correlation with anticoagulant drugs. contents: some clinical and pharmacological considerations are made about thromboprophylactic drugs (cumarinics, aspirin and heparin). risk factors are highlighted, especially those related to patients developing epidural hematomas due to the simultaneous use of low molecular weight heparin and epidural anesthesia. conclusions: there is an important correlation between epidural hematomas and hemorrhagic disorders, especially in patients under anticoagulant therapy. the awareness of the increased risk associated to epidural and spinal anesthesia, as well as the continuous surveillance and education are fundamental to prevent future cases.
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