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Search Results: 1 - 10 of 182715 matches for " Augusto Cesar de Queiroz "
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Composi o químico-bromatológica do capim-elefante submetido à aduba o química e organica Productive characteristics and chemical-bromatological composition of elephant grass submitted to chemical and organic fertilization
Tadeu Silva de Oliveira,José Carlos Pereira,Claúdio Samara dos Reis,Augusto Cesar de Queiroz
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: Objetivou-se avaliar os efeitos da aduba o química e organica sobre a composi o químico-bromatológica do capim elefante, além de estimar a energia líquida do volumoso e os nutrientes digestíveis totais desta forrageira. Foram formadas duas áreas de capineiras e utilizados dois sistemas de aduba o. Utilizou-se delineamento em blocos (seis períodos), casualizados completos e três repeti es por volumoso (aduba o química e aduba o organica) por bloco. Os dados de proteína bruta, fibra em detergente neutro, cinzas, cálcio, magnésio, potássio e fósforo foram avaliados pelo teste F, a 5% de probabilidade. Com base na fibra em detergente neutro, estimou-se a energia líquida do volumoso e os nutrientes digestíveis totais do capim-elefante nos dois sistemas de aduba o. Com base nos resultados, observa-se que o capim-elefante submetido à aduba o organica apresenta maiores valores em sua composi o químico-bromatológica. Foram observados nesta forragem submetida à aduba o organica, maiores teores de proteína bruta (17,26%), cinzas (26%) e fósforo (36,88%) e menores teores de fibra em detergente neutro (3,96%) em rela o ao capim-elefante submetido à aduba o química. A aplica o de esterco de curral na capineira de capim-elefante melhorou o teor de matéria organica no solo, o que propiciou melhoria na composi o químico-bromatológica, além de proporcionar maior flexibiliza o na frequência de utiliza o da capineira em rela o à adubada químicamente. The objectives of this work were to study the effect of chemical and organic fertilization on the forage dry matter chemical composition characteristics of elephant grass and to estimate the total net energy of forage and the total digestible nutrients. Two elephant grass stocking piles were formed and two fertilization systems were used. Soil and plant evaluations (chemical and physical analysis) were performed at field. Was carried out in a completely block (six periods) randomized design and three replicates per forage (chemical and organic fertilization) per block. Data of crude protein, neutral detergent fiber, and ashes, calcium, phosphorus, magnesium and potassium were evaluated by F test, at 5% of probability. Based on the total digestible nutrients contents, the total net energy and total digestible nutrients of the elephant grass from the two fertilization systems were estimated. The elephant grass submitted to fertilization organic showed higher chemical composition values. In this forage, higher contents of crude protein (17.26%), ashes (26%) and phosphorus (36.88%) and smaller of neutral detergent
Simula o da dinamica de nutrientes no trato gastrintestinal: aplica o e valida o de um modelo matemático para bovinos a pasto
Vieira Ricardo Augusto Mendon?a,Pereira José Carlos,Malafaia Pedro Ant?nio Muniz,Queiroz Augusto Cesar de
Revista Brasileira de Zootecnia , 2000,
Abstract: O objetivo do presente trabalho foi a valida o das predi es da dinamica ruminal e pós-ruminal dos nutrientes e do crescimento microbiano no rúmen, usando as equa es do sistema Cornell. O experimento foi realizado durante as esta es chuvosa e seca do ano de 1996, em uma área de pastagem natural localizada no município de Vi osa (MG). Foram utilizados novilhos canulados no es fago, rúmen e abomaso, durante dois períodos experimentais em cada esta o, e usados indicadores externos (Cr2O3 e Eu) para estimativa do consumo e da taxa de passagem da digesta no rúmen. Foram determinados os fluxos de nitrogênio total e de nitrogênio bacteriano no abomaso, os carboidratos totais e estruturais digeridos no rúmen e os teores em nutrientes digeríveis totais. Estas variáveis também foram preditas a partir do modelo descrito no sistema Cornell, para valida o de suas estimativas. Verificou-se que o modelo foi sensível às estimativas das taxas de passagem, superestimou (12,38%) o fluxo de nitrogênio bacteriano no abomaso e subestimou (70,64%) a disponibilidade ruminal dos carboidratos estruturais. O emprego da taxa de passagem de 0,02 h-1 no cálculo das estimativas resultou no aumento da superestima o do fluxo de N de origem bacteriana (28,66%), em virtude da maior degrada o dos carboidratos estruturais, cuja estimativa permaneceu subestimada em 21,55%. A redu o do consumo de matéria seca foi mais bem correlacionada aos teores de FDN indigerível que aos teores de FDN, devendo-se ressaltar que a capacidade diária de consumo desta fra o foi de 0,6% do peso vivo e n o diferiu entre esta es.
Simula??o da dinamica de nutrientes no trato gastrintestinal: aplica??o e valida??o de um modelo matemático para bovinos a pasto
Vieira, Ricardo Augusto Mendon?a;Pereira, José Carlos;Malafaia, Pedro Ant?nio Muniz;Queiroz, Augusto Cesar de;Jord?o, Cláudio P.;Gon?alves, André Luigi;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000300036
Abstract: the objective of the present work was to validate the ruminal and post-ruminal nutrient dynamics and the ruminal microbial growth predictions, by using the equations of the cornell system. the experiment was carried out during the rainy and dry seasons of the 1996 year, in a natural pasture area situated in the county of vi?osa (mg). esophageally, ruminally and abomasally cannulated steers were used during two experimental periods within each season, and external markers (cr2o3 and eu) were used to estimate the intake and the ruminal digesta passage rate. the total nitrogen and the bacterial nitrogen flows, total and structural carbohydrates digested in the rumen, and the total of digestible nutrients contents were determined. these variables were also predicted from the model described in the cornell system to validate its estimates. it was verified that the model was sensitive to the passage rate estimates, overestimated (12.38%) the bacterial nitrogen flow to the abomasum, and underestimated (70.64%) the structural carbohydrates availability in the rumen. the correction based on .02 h-1 passage rate in the estimates calculation resulted in an overestimation increase of the bacterial n flow (28.66%) due to the greatest structural carbohydrate degradation, whose estimates remained underestimated in 21.55%. the dry matter intake reduction was better correlated with the indigestible ndf than ndf contents itself, and it should be emphasized that the daily intake capacity of this fraction was 0.6% of the live weight and it did not differ between seasons.
Rendimento da cana-de-a?úcar é afetado por flúor
Otto, Rafael;Faria, Maria Regina Meireles de;Queiroz, Fábio Eduardo de Campos;Moura, Thiago Augusto de;Vitti, Godofredo Cesar;Cantarella, Heitor;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000300018
Abstract: heating minerals, roctks, clays and soils in aluminum and iron smelters, and in ceramic, glass, and fertilizer industries release gaseous forms of fluorine into the atmosphere. in an area grown with two varieties of sugar cane (saccharum officinarum l.) in cordeirópolis, sp (brazil) toxicity symptoms and abnormally low yields were observed in areas nearby as compared with those far from a ceramic industry. for the sp80 1816 sugarcane variety the leaf contents of f varied from 56 mg kg-1 of f in the dry matter of leaves collected according to recommended diagnostic techniques near the ceramic industry to 3 mg kg-1 f in samples obtained 13.000 m away. fluorine content in the rb83 5089 variety was 26 mg kg-1 in samples collected about 80 m from the ceramic industry. these values are higher than the 10 mg kg-1 f (or less) that is considered normal for plants grown in areas not affected by atmospheric f emissions. average sugar cane yields of the first cut of the plant cycle were 54 mg ha-1 for both varieties in the area close to the ceramic industry. average yields of the second cut (first ratoon) were 50 mg ha-1 for the sp 80 1816 variety (more sensitive to f) and 60 mg ha-1 for the rb 83 5089 variety (less sensitive to f). in the area about 13.000 m from the industry, where no foliar symptoms of toxicity were observed, yields reached 82 mg ha-1 in the first cut and 100 mg ha-1 in the ratoon. fluorine released by the ceramic industry without adequate gas emission filters seems to limit sugar cane yields as shown by visual symptoms, f concentration in leaves, and yield reduction in the vicinity of the source of f. the sugar cane varieties evaluated showed to be sensitive to the effects of excess f accumulation.
Ciclosporina versus tacrolimus no transplante renal no Brasil: uma compara??o de custos
Guerra Junior, Augusto Afonso;Acúrcio, Francisco de Assis;Andrade, Eli Iola Gurgel;Cherchiglia, Mariangela Leal;Cesar, Cibele Comini;Queiroz, Odilon Vanni de;Silva, Grazielle Dias da;
Cadernos de Saúde Pública , 2010, DOI: 10.1590/S0102-311X2010000100017
Abstract: in brazil, the unified national health system (sus) is responsible for the majority of kidney transplants. to maintain these interventions, the guidelines recommend the use of cyclosporine or tacrolimus, associated with corticosteroids and azathioprine or mycophenolate. taking the perspective of the national health system, an economic analysis was performed on the outpatient and hospital resources and medicines used by patient and therapeutic group. a cohort was constructed from 2000 to 2004, with 5,174 kidney transplant patients in use of cyclosporine or tacrolimus, identified by probabilistic record linkage from the national health system. the cohort included 4,015 patients in use of cyclosporine and 1,159 using tacrolimus. the majority were males, age < 38 years, with nephritis, cardiovascular diseases, and indeterminate causes as the most frequent primary diagnoses. after 48 months of follow-up, the expenditures were higher for kidney transplants in hospitals in the northeast, cadaver donors, patients in dialysis > 24 months before the transplant, and in the tacrolimus group. total hospital and outpatient costs and expenditure on medication were higher in patients on tacrolimus as compared to the cyclosporine group.
Fecal excretion patterns and short term bias of internal and external markers in a digestion assay with cattle
Sampaio, Cláudia Batista;Detmann, Edenio;Valente, Tiago Neves Pereira;Costa, Viviane Aparecida Carli;Valadares Filho, Sebasti?o de Campos;Queiroz, Augusto Cesar de;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000300026
Abstract: the objective of this work was to evaluate the fecal excretion profile and the short term bias of the external markers chromic oxide and titanium dioxide and the internal markers indigestible dry matter (idm), indigestible neutral detergent fiber (indf) and indigestible acid detergent fiber (iadf) in a digestion trial with cattle fed different diets. fourteen f1 red angus × nellore bulls averaging 12 months old and 287 kg were kept in individual stalls. the animals were fed elephant grass silage, corn silage or signal grass hay, supplemented or not with 20% of concentrate mixture. the experiment consisted of two 13-day experimental periods according to a 2 × 2 latin square design with seven squares grouping. the animals received 10 g of chromic oxide and 10 g of titanium dioxide through esophageal sounder daily. fecal grab samples were obtained directly from the rectum of the animals at 1:30 a.m., 3:00 a.m., 4:30 a.m., 6:00 a.m., 7:30 a.m., 9:00 a.m., 10:30 a.m., 12:00 p.m., 1:30 p.m., 3:00 p.m., 4:30 p.m., 6:00 p.m., 7:30 p.m., 9:00 p.m., 10:30 p.m. and 12:00 a.m. there was no effect of forages or concentrate levels on the dimension of excretory cycle. the fundamental period of excretory cycle was 15.06 and 18.66 hours for chromic oxide and titanium dioxide, respectively and 9.93, 9.29 and 10.55 hours for idm, indf and iadf, respectively. the oscillation range was higher for external markers. considering the characteristics of all evaluated markers together, it is recommended fecal sampling designs with at least four collections, distributed during the day or only in the diurnal period for obtaining fecal excretion estimates free of short term bias.
A??o da própolis sobre a desamina??o de aminoácidos e a fermenta??o ruminal
Stradiotti Júnior, Deolindo;Queiroz, Augusto Cesar de;Lana, Rogério de Paula;Pacheco, Cristiana Gama;Eifert, Eduardo da Costa;Nunes, Poliana Mary Magalh?es;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000400029
Abstract: the objective of this work was to determine the in vitro effect of the propolis on the specific activity of ammonia production (saap) or activity deamination of amino acids and on ruminal fermentation in bovine. the saap was determined using ruminal fluid and mcdougall buffer (1:4) with different levels of propolis extract and excess of hydrolyzed casein. in the study of the in vitro effect of the propolis on the ruminal fermentation and saap, four holstein steers were used, in two experimental periods, fed a 35.0% concentrate diet and submitted to the control and propolis extract treatments. the propolis extract obtained with ethanol at 70% in water was in vitro more efficient than that obtained with ethanol at 99.5% in water. values up to 78% of saap inhibition in relation to the control were obtained. the propolis extract did not affect dry matter intake, ruminal ph, ammonia and microbial protein concentrations. there were no differences for molar proportions of the volatile fat acid (vfa), acetic, propionic and butyric in the rumen fluid. however, the propolis extract increased the total vfa concentration as well as inhibited saap by the ruminal microorganisms, demonstrating that, in spite of not having reduced the ruminal ammonia level, it seems to exist potential of this effect to happen in other situations, as in diets with high rate of degradable protein/fermentable carbohydrate, observed in new grass pastures or grass pastures consociated with legumes.
Atividade microbiana cecal e contribui??o nutricional da cecotrofia em coelhos alimentados com ra??es contendo diferentes fontes de fibra e níveis de amido
Arruda, Alex Martins Varela de;Lopes, Darci Clementino;Ferreira, Walter Motta;Rostagno, Horacio Santiago;Queiroz, Augusto Cesar de;Pereira, Elzania Sales;Silva, José Francisco da;Jham, Gulab Newandram;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000400015
Abstract: the objective of this study was to evaluate the caecal microbial activity and caecotrophy nutritional contribution in rabbits fed diets with differents starch levels (22 or 32% on average) from a high or low inclusion of corn grain and differents fiber sources (alfalfa hay or soybean hulls), in a 2x2 factorial design. in the first experiment, 40 rabbits were individually housed in fattening cages within entirely randomized design, and fed ad libitum from 45 to 85 days of age, when they were slaughtered for collection of the ileal and caecal contents. the vfa total concentration was influenced by the interaction among treatments, being 93.82 mmol/l for the diets with high starch level and soybean hulls and 80.03 mmol/l for the diets with low starch level and alfalfa hay. in the second experiment, 40 rabbits aged 65 days were housed individually in fattening cages, in a completly randomized design, fed ad libitum for 10 days, and then received a wood necklace to allow caecotrophes collection. there was influence of the interaction between treatments on the caecotrophes protein and energy levels, being 29.66% and 4204.87 kcal/kg for the diets with high starch level and soybean hulls, and 27.98% and 4080.46 kcal/kg for the diets with low starch level and alfalfa hay. the diets with high starch level and those with soybean hulls showed higher enrichment of caecal contents and the best nutritional support for the rabbits.
Análise iterativa das equa es dos três momentos
José Augusto de Queiroz
Semina : Ciências Sociais e Humanas , 1986, DOI: 10.5433/
Abstract: The present study proposes solutions of "three moments equations" for continuous systems by identifing them as continuous beams by iterative process. No presente estudo prop e-se a solu o das "equa es dos três momentos"para o cálculo de sistemas contínuos a serem identificados como vigas contínuas, por processo iterativo.
Multimodal treatment of peritoneal malignancies - results of the implantation in a tertiary hospital
Rabelo, Fernanda Elias Ferreira;Queiroz, Fábio Lopes de;Rego, Rodrigo Soares Napole?o do;Costa, Breno Xaia Martins da;Lamounier, Paulo Cesar de Carvalho;Oliveira, Teon Augusto Noronha de;Lacerda Filho, Ant?nio;Paiva, Rodrigo de Almeida;
Journal of Coloproctology (Rio de Janeiro) , 2012, DOI: 10.1590/S2237-93632012000200002
Abstract: introduction: peritoneal carcinomatosis is a condition that may be present in the natural history of colorectal cancer and some other tumors, such as pseudomyxoma peritonei. it has been associated with poor prognosis. the treatment for patients with this condition, up until recently, was systemic chemotherapy or palliative care to relieve the pain and suffering caused by peritoneal dissemination of certain cancers. promising results, however, have been reported after the implementation of radical cytoreductive surgery followed by peroperative hyperthermic intraperitoneal chemotherapy. objective: to evaluate the results of cytoreductive surgery and peroperative hyperthermic intraperitoneal chemotherapy (hipec) in patients with peritoneal carcinomatosis secondary to colorectal cancer and pseudomyxoma peritonei. results: we retrospectively evaluated 24 patients from 2004 to 2011. mean age was 51.31 years, and 54% were female. the primary diagnosis in 50.01% of the cases was pseudomyxoma peritonei, 41.66%, of colon cancer, and 8.33%, of mesothelioma. the overall complication rate was around 83%, two patients (8%) subsequently died between the 8th and 30th postoperative day. there was an association between the peritoneal carcinomatosis index (pci) and operative time. the one-year survival rate in the group examined was 60% for colon cancer, and 78.5% for pseudomyxoma. overall survival was 50% in three years. conclusion: cytoreductive surgery combined with hipec is a treatment option for patients with peritoneal carcinomatosis of colorectal origin and pseudomyxoma. despite the high rate of peroperative complications (83%), it was possible to achieve a superior survival rate in relation to conventional treatments reported in the literature.
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