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Search Results: 1 - 10 of 77111 matches for " Jaime Araújo;Silva "
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Estima??o de parametros genéticos utilizando-se a produ??o de leite no dia do controle em primeiras lacta??es de vacas da ra?a Jersey
Dionello, Nelson José Laurino;Silva, Carlos Alberto Soares da;Costa, Claudio Napolis;Cobuci, Jaime Araújo;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000600010
Abstract: data consisting of 3,531 test day records of 620 first parity jersey cows were used to estimate genetic parameters for milk yield. covariance components were estimated by repeatability and random regression animal models. the wilmink function was used in the random regression model to fit the fixed effect of season of calving and the additive genetic, permanent environment and residual random effects. the repeatability model included the fixed effects of herd-year-month of test, season of calving and age at calving as a covariable with linear and quadratic terms and animal, permanent environmental and residual random effects. the estimates of additive genetic, permanent environmental, residual and phenotypic variances, heritability and repeatability obtained by the repeatability model for milk yield were, respectively: 7.08; 1.88; 7.79 and 16.76 kg2, 0.42 and 0.50. the estimates of heritability for milk yield obtained from the random regression model decreased from 0.81 in the beginning of the lactation to 0.20 in the end. larger estimates of genetic variance were observed at the extremes of the lactation period, but they were practically constant in mid-lactation. the permanent environmental variances increased along lactation. genetic correlations between milk yields were larger in close test days, particularly in mid-lactation and decreased for the most distant test days. genetic parameters do not indicate the repeatability model as an alternative to use test day records in order to estimate breeding values for milk yield of jersey cows in brazil.
Uso de fun??es ortogonais para descrever a produ??o de leite no dia de controle por meio de modelos de regress?o aleatória
Araújo, Cláudio Vieira de;Torres, Robledo de Almeida;Costa, Claudio Napolis;Torres Filho, Rodolpho de Almeida;Araújo, Simone Inoe;Lopes, Paulo Sávio;Regazzi, Adair José;Pereira, Carmen Silva;Cobuci, Jaime Araújo;Sarmento, José Lindenberg Rocha;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000400005
Abstract: data comprising 68,523 test day milk yield of 8,536 cows of the holstein breed, daughters of 537 sires, distributed in 266 herds, calving from 1996 to 2001, were used to compare random regression models, for estimating variance. test day records (td) were analyzed by different random regression models regarding the function used to describe the trajectory of the lactation curve of the animals. legendre orthogonal polynomials function of second, third and fourth order were used. the random regression models included the effects of herd-month-year of the control, genetic group of the animals; the frequency of the daily milk; regression coefficients for each class of age-season (in order to describe the fixed part of the lactation curve) and random regression coefficients related to the direct genetic and the permanent environmental effects. the heritability estimates obtained using the random regression models ranged from 0.122 to 0.291. the random regression model which used the fourth order legendre polynomials was the model which better described the genetic variation of the milk yield, according to aic test.
De doen?as a estruturas, ou, da medicina a uma antropologia: a constitui??o e desconstitui??o da nosologia psiquiátrica entre Pinel e Lacan (Uma contribui??o psicanalítica à fundamenta??o teórica da "reforma psiquiátrica")
Oliveira, Jaime Araújo;
Physis: Revista de Saúde Coletiva , 1996, DOI: 10.1590/S0103-73311996000100003
Abstract: this article starts with the medical-juridical notion of mental illnesses, as conceived at the emergence of psychiatry in the late eighteenth century. lt, then, attempts to look into the difficulties of supporting this concept along the changes made by the paradigms of medicine in the two subsequent centuries. lt points out the psychiatry's progressive "emptying" process and, therefore, the occupation of its gap by new and rising disciplines in the late nineteenth century: neurology and psychoanalysis. it tries to show how the latter, though grown out of medicine, manages to become radically self-governing within this field. lt supports the thesis that such a movement toward self-govemment, started by freud and undermined by his direct followers, is retrieved and completed by the lacanian rereading of freud's writings. though such a rereading, and as part of the self-goveming process, the psychoanalytical notion of clinical structure ends up replacing the old medical one of (mental) illnesses conceming most ways of behaviour and existence that had been psychiatry's objects since the seventeen-hundreds. once the normative oposition health x illness (normality x abnormality) makes room for a mere set of altemative possibilities - lacking real grounds for value judgement among such alternatives - further ethical implications are brought about. the author suggests that the assumptions of contemporary psychoanalysis can contribute to a theoretical grounding for the so-called psychiatric reform.
Persistência na lacta??o para vacas da ra?a Holandesa criadas no Estado do Rio Grande do Sul via modelos de regress?o aleatória
Dorneles, Cristian Kelen Pinto;Rorato, Paulo Roberto Nogara;Cobuci, Jaime Araújo;Lopes, Jader Silva;Weber, Tomás;Oliveira, Henrique Nunes de;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009000500028
Abstract: there were used 21,702 test day milk yields from 2,429 first parity holstein breed cows, daughters of 2,031 dams and 233 sires, distributed over 33 herds in the state of rio grande do sul, from 1992 to 2003. genetic parameters for three measures of lactation persistency (ps1, ps2 e ps3) and for milk production to 305 days (p305) were evaluated. a random regression model adjusted by fourth order legendre polynomial was used. the random regression model adjusted to test day between the sixth and the 305th lactation day included the herd-year-season of the test day, the age of the cow at the parturition effects and the order fourth legendre polinomial parameters, for modeling the milk production average curve of the population, and parameters of the same polinomial for modeling the random additive genetic and permanent environmental effects. the estimated heritabilities were 0.05, 0.08 and 0.19, respectively to ps1, ps2 and ps3, and 0.25 to p305, suggesting the possibility of a genetic gain by selection for ps3 and p305. the genetic correlations between persistency measurements and p305 ranged from -0.05 to 0.07, suggesting being, persistency and milk yield, characteristics determined by different gene groups, and that the selection for p305, usually done, do not promote genetic progress for persistency.
Efeitos genéticos e de ambiente em um rebanho do ecótipo Mantiqueira: I. Características reprodutivas
Silva, Marcos Vinicius Gualberto Barbosa;Cobuci, Jaime Araújo;Ferreira, William José;Oliveira, Paulo Rogério Palma de;Machado, Marco Ant?nio;Ferreira, Cezar Parreira;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000300019
Abstract: the reproductive performance of mantiqueira cows were analyzed using data of records of age of first calving (ipp), calving interval (idp) and days open (pserv). these data were the first five lactations of 1406 cows of mantiqueira ecotype consisting of daughters of 113 sires, with calving from 1952 to 1997, from the paraiba valley regional center of research in s?o paulo state (apta/saa-sp) breeding program. models to obtain least square means included fixed effects for year and season of birth (for ipp) or calving (for idp and pserv) and age, in addition to the random effect of sire and error. the models to obtain genetic parameters by reml methodology included fixed effects for year-season and age, in addition to the random effects of animal and error. the least square means ± standard error were 45.60 ± 8.14 months to the ipp, 460.56 ± 122.05 days to the idp and 181.44 ± 110.31 days to the pserv. estimated values of heritabilities were: 0.13 (ipp), 0.01 (idp), and 0.01 (pserv).
Análise de diversidade genética do gene da osteopontina em bovinos da ra?a girolando
Mello, Fernanda de;Guimar?es, Marta Fonseca Martins;Cobuci, Jaime Araújo;Silva, Marcos Vinícius Gualberto Barbosa da;Braccini Neto, José;Paiva, Daisyléa de Souza;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011001100013
Abstract: the objective was to obtain the indices of genetic diversity for the snp (single nucleotide polymorphism) of the 4 intron osteopontin gene (opn) for 434 animals (87 bulls and 347 cows) participants in the teste de progênie da ra?a girolando (girolando progeny test) in brazil. for amplification, primers used were described for the holstein breed, and differentiation of alleles c/t snp that was obtained by pcr-rflp. genotype frequencies of tt (52.53%), ct (38.71%) and cc (8.76%) and allele frequencies of t (71.9%) and c (28.1%) indicate that the population is in hardy-weinberg principle (hwp). although the opn gene locus is in hwp, the higher frequency of allele t of snp in these animals may suggest a setting-trend of allele t in the race. no difference was observed between the group of bulls and cows (fst = -0.018), supporting the estimate of population balance. considering the values estimated by the fis (0.043), it is likely that high numbers of individuals homozygous for the t allele observed in the population occur because of possible inheritance of this allele coming from the zebu breed, rather than inbreeding. thus, to better characterize the opn gene polymorphism, assessments in a larger number of animals must be performed, since only animals that participated in the progeny test were assessed.
Dietary Carbohydrates Modulate Candida albicans Biofilm Development on the Denture Surface
Ivone Lima Santana, Letícia Machado Gon?alves, Andréa Araújo de Vasconcellos, Wander José da Silva, Jaime Aparecido Cury, Altair Antoninha Del Bel Cury
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0064645
Abstract: The purpose of this study was to investigate whether dietary carbohydrates can modulate the development of Candida albicans biofilms on the denture material surface. Poly (methyl methacrylate) acrylic resin discs were fabricated and had their surface roughness measured. Biofilms of C. albicans ATCC 90028 were developed on saliva-coated specimens in culture medium without (control) or with carbohydrate supplementation by starch, starch+sucrose, glucose, or sucrose for 72 h. The cell count, metabolic activity, biovolume, average thickness, and roughness coefficient were evaluated at the adhesion phase (1.5 h) and after 24, 48, and 72 h. The secretion of proteinases and phospholipases, cell surface energy, and production of extra/intracellular polysaccharides were analyzed after 72 h of biofilm development. Data were analyzed by one- and two-way ANOVA followed by Tukey’s test at 5% significance level. In the early stages of colonization (adhesion and 24 h), the glucose group showed the highest cell counts and metabolic activity among the groups (p<0.05). After maturation (48 and 72 h), biofilms exposed to glucose, sucrose, or starch+sucrose showed higher cell counts and metabolic activity than the control and starch groups (p<0.001). Compared to the control group, biofilms developed on starch or starch+sucrose had more proteinase activity (p<0.001), whereas biofilms developed on glucose or sucrose had more phospholipase activity (p<0.05). Exposure to starch+sucrose increased the production of extracellular and intracellular polysaccharides (p<0.05). Biofilms developed on starch or without carbohydrate supplementation presented cells with more hydrophobic behavior compared to the other groups. Confocal images showed hyphae forms on biofilms exposed to starch or starch+sucrose. Within the conditions studied, it can be concluded that dietary carbohydrates can modulate biofilm development on the denture surface by affecting virulence factors and structural features.
Aspectos da ecologia e do comportamento de flebotomíneos em área endêmica de leishmaniose visceral, Minas Gerais
Barata, Ricardo Andrade;Fran?a-Silva, Jo?o Carlos;Mayrink, Wilson;Silva, Jaime Costa da;Prata, Aluízio;Lorosa, Elias Seixas;Fiúza, Jaqueline Araújo;Gon?alves, Caroline Macedo;Paula, Kênia Maria de;Dias, Edelberto Santos;
Revista da Sociedade Brasileira de Medicina Tropical , 2005, DOI: 10.1590/S0037-86822005000500012
Abstract: studies on the behavioral and feeding habits of some species of phlebotominae sand flies have contributed to the comprehension of the epidemiology of leishmaniasis. in the present work, systematic captures were performed monthly in the municipality of porteirinha (mg) using 28 light traps (cdc) from january to december 2002. fourteen different species of phlebotomine were captured in a total of 1,408 specimens. the highest percentage of individuals (53.3%) was collected in the peridomicile against 46.7% in the intradomicile. lutzomyia longipalpis was the predominant species in that region. the blood feeding of 38 females of this species from the field was analyzed by precipitin reaction. the results indicated that lutzomyia longipalpis is an opportunist (65.1%) species that feeds on a wide variety of vertebrates in nature.
Local urban development: the Manaus Free Zone case
Emanuelle Silva Araújo
Urbe : Revista Brasileira de Gest?o Urbana , 2009,
Abstract: Since the late 19th Century, along with the rubber boom, the Amazon has been target of governmental incentives for territory occupation. One of the biggest incentives for migration has its origin in the National Integration Policy over the 1960’s, during the military dictatorship: the Manaus Free Zone. This policy has brought a series of transformations related to the capital’s growth dynamics, mostly concerning the city’s urban tissue. This work’s starting point is that the phenomenon of Manaus fast population growth is mostly due to the great human migration towards the city, once there was an attraction factor, which was the Free Zone incentives policy. Therefore, we sought to analyze the relations between the creation of the Manaus Free Zone and its dynamics, Manaus demographic dynamics and its modifications related to the urban tissue. It can be noticed that there has been great urbanization, industrialization and progress in relation to the service sector, magnifying the demand not only for these services but also for urban infrastructure. This movement, as a consequence, has upgraded the region while generated great social issues.
Numerical Evaluation of Strength in the Interface during Indentation Spherical Testing in Thin Films  [PDF]
Rodrigo Araújo, Avelino Manuel da Silva Dias
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.53019
Abstract:

The need for more components that are more resistant to wear and corrosion has promoted a growing interest in surface engineering. The search for improved tribological properties in materials contributes to the development of processes that extend the useful life of components and their applications in increasingly severe environments. In this respect, thin ceramic coatings have been used to enhance the tribological properties of components that operate under these conditions. However, new experimental assays are needed to assess the behaviour of these films and their surface as substrate. These experimental analyses require the use of sophisticated equipment and specialized personnel. On the other hand, with advances in computational mechanics, the application of numerical analysis to solve numerous technological problems has been increasingly frequent, owing to its low operational costs. This study aims to simulate an indentation assay with spherical penetrator in systems composed of thin ceramic film deposited on metallic substrate using a Finite Element commercial code. The main objective of this study was to evaluate the field behaviour of stresses in the contact region of the indenter with the sample, on the outline of the impression made by the penetrator and, primarily, on the film-substrate interface.

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