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Search Results: 1 - 10 of 332018 matches for " Francisco Júlio do;Trebi "
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Usable work of macro-scale cavities in liquids
Schulz, Harry Edmar;Lombardi, Geraldo;Nascimento, Francisco Júlio do;Trebi,lio José Donizeti;Santos, Jorge Nicolau dos;Sim?es, André Luiz Andrade;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000400008
Abstract: it is shown that the generation of cavities in a liquid can produce usable work, which is illustrated by the stretching of a string. this work is done during the expansion of the cavity, and not with its collapse. basic equations are presented for the movement of a device moved by the so called cavity events. a theoretical solution is also proposed, which uses polynomial functions relating the so called "excess of pressure" in the cavity and time. evaluations of the force generated during the expansion of the cavity showed a mean peak value of about 58 n for the moving container, while measurements with the container fixed to a support showed a peak value of 476 n, considered somewhat overestimated, because high frequency oscillations seem to superpose the mean behavior. simultaneous phenomena occurring during the cavity events are also described. series of pictures of the experiments are presented.
Análise biométrica de linhagens de abóbora
Bezerra Neto, Francisco V;Leal, Nilton R;Costa, Fabiane R;Gon?alves, Gustavo M;Amaral Júnior, Ant?nio T do;Vasconcellos,lio O;Mello, Miguel;
Horticultura Brasileira , 2006, DOI: 10.1590/S0102-05362006000300022
Abstract: five morphological and agronomic characteristics were evaluated in seven squash lines. the experiment was carried out in completely randomized blocks, with three replications, and six-plant plots. genetic parameters, as well as simple and canonic correlations were estimated. heritability for average fruit weight and external longitudinal length were higher than 80%, with a variation index higher than one. thus, application of simple breeding methods, such as mass selection, will result in good selection gains. concerning simple correlations, most of the characteristic pairs (80%) had genotypic correlations higher than phenotypic and environmental correlations. simple and canonical correlations revealed that fruit average weight increased together with increments in pulp thickness and longitudinal and transversal fruit length. on the other hand, plants with more fruits produced smaller fruits (longitudinal length), with thinner pulp, but with higher transversal length. in this population, promising commercial genotypes, producing small fruits with thick pulps, can be obtained using selection indexes.
Efeito de diferentes dosagens de vitamina A injetável na produ??o e qualidade de embri?es bovinos da ra?a Nelore
Amaral, Bruno Cesar do;Souza, José Camis?o de;Bertechini, Ant?nio Gilberto;Viveiros, Ana Tereza de Mendon?a;Teixeira, Júlio César;Arantes, Alexandre Francisco Amaral;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000300024
Abstract: the objective was to evaluate the effect of four different dosages of retinol palmitate 0 - (n=14), 500,000 (n=15), 1,000,000 (n=17) and 1,500,000 (n=16) international units (iu) of vitamin a in the form of retinol palmitate on production and quality of embryos recovered from nelore donor cows (n=64). the experiment was carried out in the embryo transfer company cauembryo in the county of funilandia - mg. cows were superovulated on the 10th (n=18),11th (n=10),12th (n=26) or 13th (n=10) days after estrus onset with an injection of 20 ml of folltropin? (vetrepharm, belleville, canada) or 10 ml of pluset? (i.f. serono,roma, itália) administered in decreasing doses for four days twice daily (each 12 h). vitamin a injection was delivered with the first fsh injection. luteolysis was induced on the 4th day of fsh treatment by giving 0.75 mg of sodium cloprostenol (ciosin?, coopers do brasil, s?o paulo, brasil) and donors observed in estrus were artificially inseminated 12 and 24 hours after the onset of estrus using semen of different bulls of proven fertility. statistical analysis was carried out using the genmod procedure of sas (sas institute, 1995). the number of viable embryos differed (p<0.0001), between control (3.6), and 500,000 (6.1), 1,000,000 (6.5) and 1,500,000 (6.7) vitamin a treatments. percentage of viable embryos also increased (p<0.01), from 0.51 in the control, to 0.57, 0.63 and 0.60 in order of increasing vitamin a treatment groups, respectively. number of total structures recovered (er) was not different between supplemented (9.5, 8.3 and 10.5 respectively for 500,000, 1,000,000 e 1,500,000 iu of vitamin a) and not supplemented (8.2). these results indicate that supplementation of vitamin a i.m. before flushing improves embryo quality without interfere in the quantity of embryos recovered.
Development and application of a bioeconomic efficiency index for beef cattle production in Rio Grande do Sul, Brazil
Lampert, Vinícius do Nascimento;Barcellos, Júlio Otávio Jardim;Kliemann Neto, Francisco José;Canellas, Leonardo Canali;Dill, Matheus Dhein;Canozzi, Maria Eugênia Andrighetto;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300042
Abstract: an index was developed to estimate the bioeconomic efficiency of production systems, identifying alternative scenarios that could improve their efficiency, and building isoefficiency relations in beef cattle production systems in rio grande do sul. the concept of return on investment was used to develop the indicator. scenarios regarded as efficient showed values higher than 3. the bioeconomic efficiency index for beef cattle production in the theoretical reference scenario was considered inefficient. at least four modifications in the variables method made it a bioeconomically efficient activity. these circumstances were studied using sensitivity analyses, with theoretical changes in the scenarios by changing variables two by two, while the others were kept constant. in rio grande do sul, alternatives that make the activity efficient were identified by changing productivity, production cost, land price and product price. isoefficiency relationships were identified in other scenarios. the application of this indicator in other agricultural activities, as well as the design of bioefficiency studies including both environmental and social welfare characteristics are recommended.
Efeito de Estratégia de Suplementa??o com Concentrado no Desempenho de Cabras Mesti?as Saanen, em Dois Sistemas de Produ??o
Macedo, Vicente de Paulo;Damasceno, Júlio Cesar;Santos, Geraldo Tadeu dos;Martins, Elias Nunes;Macedo, Francisco de Assis F.;Canto, Marcos Weber do;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000200022
Abstract: the experiment was carried out to evaluate the performances of cross breed saanen dairy goats submitted to two strategies of supplementation with concentrate 30% of daily requirements in net energy (nrc, 1981) supplied by concentrate, from third week until the end of lactation (esc.1) or 60% of requirements from the 3rd to the 13th week of lactation and 15% from 14th until the end of lactation (esc.2); and evaluate the animal response to these strategies of supplementation with concentrate in a semi-confined or pasture systems. thirty one animals were used in a completely randomized design. the system of production affected the total intake of concentrate and total milk production; at pasture system the values for these two variables were higher. the supplementation with concentrate affected the total intake of concentrate and total production of milk and the relation of milk/consumption of concentrate. the highest value for relation of milk/consumption of concentrate and the least for the total consumption of concentrate were obtained at esc.1. body weight affected of the system of production, resulting in a higher value to the system of pasture. weight and body condition had different responses to he supplementation with concentrate according to the system of production. the semi-confined system esc.2 resulted in a higher value to the body condition; the body weight was no affected. at pasture system the highest values for weight and body condition were obtained in the supplementation with concentrate esc.1. reproductive parameters did not affect supplementation with concentrate and system of production.
Desenvolvimento de modelo experimental de endometriose em ratas
Amaral, Vivian Ferreira do;Dal Lago, Eduardo Andreazza;Kondo, William;Guarita-Souza, Luiz César;Francisco, Júlio César;
Revista do Colégio Brasileiro de Cirurgi?es , 2009, DOI: 10.1590/S0100-69912009000300012
Abstract: objectives: to develop an experimental model of endometriosis in rats. methods: thirty adult female wistar rats were used. the surgical technique consisted of median laparotomy with identification of the bicornuate uterus and resection of a 2-cm segment of the right uterine horn. a 0.25 cm2 flap was removed from that structure and sutured to the abdominal wall with the endometrial side facing the peritoneal cavity. the rats were randomly divided into two groups according to the reoperation date: group 1 (n=15) was reoperated in 30 days, and group 2 (n=15), in 60 days. on the occasion of the second laparotomy, the implants were evaluated macroscopically, resected and referred for microscopic analysis with hematoxylin-eosin and immunohistochemical staining (hema, ae1 and ae2). results: the implants developed in 83.3 % of group 1 and 71.4% of group 2. there was no statistically significant difference between the weights of the animals in the two groups. no statistically significant difference was found in the surface area of the induced lesions: in group 1, the mean was 0.37 cm2 and in group 2, 0.25 cm2. according to keenan's semiquantitative histological classification (based on the preservation status of the epithelial layer of the endometrium), the mean for group 1 was 1.9 and for group 2, 2.4. conclusion: the technique used for inducing the development of endometriosis in rats was satisfactory.
Worldwide geographical distribution of Black Sigatoka for banana: predictions based on climate change models
Jesus Júnior, Waldir Cintra de;Valadares Júnior, Ranolfo;Cecílio, Roberto Avelino;Moraes, Willian Bucker;Vale, Francisco Xavier Ribeiro do;Alves, Fábio Ramos;Paul, Pierce Anderson;
Scientia Agricola , 2008, DOI: 10.1590/S0103-90162008000700008
Abstract: as mudan?as climáticas poder?o alterar as doen?as de plantas e afetar a eficácia das medidas de manejo. um dos prováveis impactos será na distribui??o geográfica das doen?as. a sigatoka negra é considerada a principal doen?a da cultura da banana em decorrência dos danos causados e aumento do custo de manejo. o impacto sócio-econ?mico da doen?a continua aumentando, uma vez que a doen?a tem atingido novas áreas de plantio, tornando o manejo mais difícil. este trabalho tem por objetivos comparar a distribui??o geográfica da doen?a por meio da elabora??o de mapas nas seguintes situa??es: a) clima atual e futuro (2020, 2050 e 2080), b) cenários a2 e b2 do painel intergovernamental de mudan?as climáticas, c) predito por seis diferentes modelos de mudan?as climáticas e pela média dos mesmos e, d) entre meses. haverá redu??o das áreas favoráveis à doen?a no futuro, sendo que tal redu??o será mais acentuada no cenário a2 do que no b2 e gradativa para as décadas de 2020, 2050 e 2080. predi??es efetuadas com o uso da média dos dados estimados pelos modelos permitiram redu??o na variabilidade da simula??o em compara??o com a predi??o gerada por cada modelo individualmente. altera??es na distribui??o geográfica da doen?a ocorrer?o entre meses, de modo que áreas consideradas desfavoráveis tornar-se-?o favoráveis e vice-versa. apesar disso, extensas áreas continuar?o favoráveis ao desenvolvimento da sigatoka negra.
High prevalence of chronic pelvic pain in women in Ribeir?o Preto, Brazil and direct association with abdominal surgery
Silva, Gabriela Pagano de Oliveira Goncalves da;Nascimento, Anderson Luís do;Michelazzo, Daniela;Alves Junior, Fernando Filardi;Rocha, Marcelo Gondim;Silva, Júlio César Rosa e;Reis, Francisco José Candido dos;Nogueira, Antonio Alberto;Poli Neto, Omero Benedicto;
Clinics , 2011, DOI: 10.1590/S1807-59322011000800001
Abstract: introduction: chronic pelvic pain is a disease that directly affects the social and professional lives of women. objective: to estimate the prevalence of this clinical condition and to identify independent factors associated with it in women living in ribeir?o preto, brazil. methods: a one-year cross-sectional study was conducted in a population sample of 1,278 women over the age of 1,278 women over the age of 14 years. the target population was predominantly composed of women who are treated by the public health system. the questionnaire was administered by interviewers who were not linked to the city health care programs. the prevalence of the morbidity was estimated. first, we identified the significant variables associated with pelvic pain (p<0.10) and then we attributed values of 0 or 1 to the absence or presence of these variables. logistic regression analysis was used to identify and estimate the simultaneous impact of the independent variables. the results were expressed by odds ratio and their 95% confidence interval with p<0.05. results: the disease was found in 11.5% (147/1,278) of the sample. the independent predictors were dyspareunia, previous abdominal surgery, depression, dysmenorrhea, anxiety, current sexual activity, low back pain, constipation, urinary symptoms, and low educational level. conclusion: the prevalence of chronic pelvic pain in ribeir?o preto is high and is associated with conditions that can usually be prevented, controlled, or resolved by improvement of public health policies and public education.
Composi??o físico-química e produ??o do leite de búfalas da ra?a Mediterraneo no oeste do Estado de S?o Paulo
Macedo, Marcelo Pereira;Wechsler, Francisco Stefano;Ramos, Alcides de Amorim;Amaral, Jackson Barros do;Souza, Júlio César de;Resende, Flávio Dutra de;Oliveira, José Victor de;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000400024
Abstract: the objective of this study was to evaluate milk yield and some physico-chemical characteristics of milk from mediterranean buffalo cows raised in western s?o paulo. a total of 1438 observations was collected from 152 lactations that occurred from 1985 to 1995, at the experimental station of andradina. the data were analyzed by means of the glm procedure of sas. the statistical model for milk production had month and lactation as fixed effects. the model for chemical constituents included milk yield as covariate. all effects were significant. the overall adjusted means were 4.52 kg, 4.13%, 6.59%; 17.01%, 10.47% and 18.98°d for milk production, protein, fat and total solids, solids not fat and titratable acidity, respectively. high nutrient contents were observed, which shows the good quality of the product.
Performance of tetraploid alfalfa genotypes as exposed to aluminum toxicity  [PDF]
Le?nidas P. Passos, Maurício Marini K?pp, Francisco J. Silva Lédo
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.32027
Abstract: A study was carried out to evaluate the development of 12 tetraploid alfalfa cultivars exposed to Al toxicity in nutrient solution. Newly germinated seedlings of cultivars Alfa 200, Alto, Araucana, Costera, Crioula, Esmeralda, Falcon, F-708, Rio, Romagnola, Valley Plus, and Victoria, were exposed to either 0, 4, 8 or 12 mg·L-1 Al3+. Plants were analyzed regarding root length (RL) and dry matter (RDM), aerial part length (APL), and dry matter (APDM), hypocotyl length (HypL) and dry matter (HypDM), epicotyl length (EpiL) and dry matter (EpiDM), and petiole length (PetL), and dry matter (PetDM). Results indicated that, although all genotypes exhibited detectable sensitivity to such a stress, cvs. Crioula, Victoria and Alpha-200 were tolerant to 4 mg·L-1 Al3+ toxicity. It was also concluded that Al3+ levels up to the 4 mg·L-1 will be effective for screening tetraploid alfalfa genotypes regarding this type of stress, when evaluations are made in nutrient solution. Finally, RL is the most suitable variable for conducting such evaluations, but all variables related to dry matter in the aerial part are also recommended.
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