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Search Results: 1 - 10 of 51385 matches for " Alberto Magno;Sant′Ana "
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Produ??o de leite e desempenho dos bezerros de vacas Nelore e mesti?as
Oliveira, Vítor Corrêa de;Fontes, Carlos Augusto de Alencar;Siqueira, Jo?o Gomes de;Fernandes, Alberto Magno;SantAna, Nivaldo de Faria;Chambela Neto, Alberto;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000900018
Abstract: the research was carried out to evaluate the lactation curves of nellore and crossbred f1 limousin-nellore (ln) and simmental-nellore (sn) cows and the performance of the progeny. thirteen cows from each breed group, with age ranging from 5 to 9 years, and the respective calves were used. from 15 days after calving until weaning of the calves (210 days), the cows and calves were kept in individual pens. the nutritional requirements of the cows for maintenance and lactation were met. the same ration was offered to the calves from the 90 days of age, in limited amounts to supply 30% of the nutritional requirements. the ration was formulated with 30% of concentrate and 70% of silage, dm basis. monthly, milk production of the cows was estimated, utilizing the weigh-suckle-weigh method. by means of nonlinear model, it was estimated the time needed for the cows to reach the peak of lactation, the production at the peak of lactation; the persistence of milk production and total and daily average milk production. nellore cows showed lower production at the peak of lactation, total and daily average milk production, but higher persistency than crossbred cows. the productions in the lactation peak, total and daily average, in cows sn, were higher than in cows ln, however, no difference was observed between these groups for lactation persistence. calves from nellore cows had lower birth weight, weaning weight and preweaning weight gain than those from crossbred cows. there was no difference between calves from the two crossbred groups. it is concluded that crossbred cows have higher maternal ability than nellore cows.
Desempenho de novilhos mantidos em pastagens de capim-elefante e capim-momba?a
Garcia, Carolina de Souza;Fernandes, Alberto Magno;Fontes, Carlos Augusto de Alencar;Vieira, Ricardo Augusto Mendon?a;Sant'Ana, Nivaldo de Faria;Pimentel, Viviane Antunes;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000200023
Abstract: the performance of steers raised on elephant and mombasa grass pastures was evaluated from october to december 2006. a rotational grazing system with a regulated forage offer was adopted. the experimental area consisted of two repetitions containing 18 0.25-ha paddocks divided into nine paddocks with elephant grass and nine with mombasa grass. forage species, area repetition, the interaction among these effects, paddocks within the interaction, and the experimental error were the effects of the treatments. this model was used to analyze pasture attributes. for analyses of intake, digestibility and gain, 24 steers were randomly assigned to the respective interactions among forage vs. repetition vs. grazing system, totaling three animals per triple interaction. the grazing systems consisted of ad libitum (al) and restricted (pr) grazing. elephant-grass showed the highest total dry matter biomass (tb) and green leaf dry matter biomass (gldm). there were no differences among forage plants for production of biomass of green leaf dry matter; leaf proportion was the greatest in mombasa grass, however. extrusas showed similar bromatological composition. only crude protein intake, which was the highest for mombasa pasture, differed among forage plants. ad libitum feeding enabled a higher intake of all nutrients from both pastures. digestibility of nutrients was higher for elephant-grass but it did not differ among feeding levels: only crude protein content was the highest on pasture where grazing was restrict and gross energy content of pasture was higher for ad libitum grazing system. despite qualitative and quantitative differences among forage plants, differences of weight gain per animal and per area were not found. for animal with ad libitum feeding, average body mass gain was 850 g/day and gain per area was 246 kg/ha during the experimental period.
Eficiência de utiliza??o da energia alimentar para a produ??o de bezerros em vacas Nelore e mesti?as
Fontes, Carlos Augusto de Alencar;Oliveira, Vítor Corrêa de;Siqueira, Jo?o Gomes de;Fernandes, Alberto Magno;Sant'Ana, Nivaldo de Faria;Melo, Thiago Vasconcelos;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000900018
Abstract: the objective was to evaluate the efficiency of conversion of dry matter (dm) and metabolizable energy (me) of the diet on weight gain and weight of calf weaned per cow. a total of 13 nellore, 13 crossbred f1 simental × nellore (sn) and 13 f1 limousin × nellore (ln) cows with 5 to 9 years of age and their offspring was used. between 15 and 210 days post calving, the cows were kept in individual stalls, with the calves. diets contained 30:70% (% dm) concentrate to corn or sorghum silages ratio, in the first and second half of the experimental period, respectively. the metabolizable energy content of the diet was obtained using the 0.82 factor in the conversion of digestible energy, experimentally determined, in metabolizable energy. the milk production was determined monthly using the calf weigh-suckle-weigh method. the efficiency was evaluated considering the ratios: kg of calf weaned and kg weight gain of calf per kg dm, or by mcal of em consumed by the cow, or by cow/calf pair in the period of lactation or were estimated for all the year. the relationship of calf weight/weight of the cow (cp/lw) at weaning was also considered. the crossbred cows showed higher efficiency of conversion of the dm and the feed energy in weight of weaned calf and in weight gain of calf. they showed also the highest relations cp/lw at weaning. the two crossbred groups did not differ on the efficiency. the use of matrices obtained by crossing european breeds and nellore cattle enables raising the efficiency of cow-calf enterprise.
Eficiência de uso de nitrogênio em cobertura pelo feijoeiro irrigado
Sant'Ana, Edvaldo V. P.;Santos, Alberto B. dos;Silveira, Pedro M. da;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2011, DOI: 10.1590/S1415-43662011000500004
Abstract: nitrogen fertilization is one of the management techniques necessary to achieve high yield potential in irrigated agricultural systems. the objective of this study was to evaluate effects of nitrogen applied as topdressing on phytobiomass and nutrient use efficiency in dry bean cultivar brs horizonte. the experiment was conducted at the national rice and beans research center of embrapa in a distrophic red latosol in randomized block design with four replications. the nitrogen rates used were 0, 30, 60, 120 and 240 kg ha-1, half applied 10 days after plant emergence and half, 17 days after plant emergence in the form of urea. dry bean phytobiomass was linearly related with n rate at flowering, while at harvest the response was quadratic. relation between grain harvest index, nitrogen harvest index and n rate was quadratic and the maximum index was obtained at 140 kg n ha-1. nitrogen use efficiency by dry bean varied with n rate applied and type of efficiency while agronomical and physiological efficiencies decreased with increase n rates.
Edvaldo Vieira Pacheco SantAna,Alberto Baêta dos Santos,Pedro Marques da Silveira
Pesquisa Agropecuária Tropical , 2010, DOI: 10.5216/pat.v40i4.6320
Abstract: Nitrogen deficiency is one of the most limiting yield factors for dry bean. The objective of this study was to evaluate effects of topdressing nitrogen on chlorophyll and nitrogen concentrations in dry bean (BRS Horizonte cultivar) leaves and yield. The experiment was conducted at Embrapa Arroz e Feij o, in Santo Ant nio de Goiás, Goiás State, Brazil, using a dystrophic dark red latosol. The experimental design was randomized blocks with four replications. The nitrogen rates used were 0 kg ha-1, 30 kg ha-1, 60 kg ha-1, 120 kg ha-1, and 240 kg ha-1. Half of the N was applied at 10 days after emergence and half was applied at 17 days after emergence, using urea as fertilizer. Grain yield and chlorophyll concentration showed quadratic response to increasing N rates, whereas N concentration in leaves increased linearly. The chlorophyll concentration increased according to plant age, while the N concentration in leaves decreased. Chlorophyll and N concentrations in leaves were positively associated with grain yield. Chlorophyll meter readings estimated adequately chlorophyll concentrations in dry bean leaves and can be used to diagnose this nutrient in dry bean. KEY-WORDS: Phaseolus vulgaris; chlorophyll meter; nitrogen level; no-till system. A carência de nitrogênio é um dos fatores mais limitantes à produtividade de gr os de feij o. O objetivo deste estudo foi avaliar os efeitos de doses de nitrogênio aplicadas em cobertura sobre o teor relativo de clorofila (TRC - leitura SPAD), teor de nitrogênio nas folhas (TNF) e produtividade de gr os da cultivar BRS horizonte de feijoeiro. O experimento foi conduzido na Embrapa Arroz e Feij o, em Santo Ant nio de Goiás (GO), em Latossolo Vermelho distrófico. Foi utilizado delineamento experimental de blocos ao acaso, com quatro repeti es e cinco doses de nitrogênio (0 kg ha-1, 30 kg ha-1, 60 kg ha-1, 120 kg ha-1 e 240 kg ha-1), aplicadas metade aos dez dias após a emergência (DAE) e a outra metade aos 17 DAE, na forma de ureia. A produtividade de gr os e o TRC apresentaram respostas quadráticas às doses de N e o TNF aumentou linearmente. O TRC aumentou com a idade das plantas, enquanto o TNF diminuiu, e ambos os teores foram associados à produtividade de gr os. As leituras efetuadas com clorofil metro estimaram adequadamente o TRC e podem substituir a determina o do TNF, para diagn&oa
Escurecimento dentário e necrose pulpar após cirurgia ortognática: o laringoscópio e o traumatismo dentário
Alberto Consolaro,Eduardo Sant'Ana,Maria Fernanda M-O Consolaro
Revista Dental Press de Ortodontia e Ortopedia Facial , 2007, DOI: 10.1590/s1415-54192007000500003
Mini-implantes: pontos consensuais e questionamentos sobre o seu uso clínico
Alberto Consolaro,Eduardo Sant'ana,Carlos Eduardo Francischone Jr,Maria Fernanda M-O Consolaro
Revista Dental Press de Ortodontia e Ortopedia Facial , 2008, DOI: 10.1590/s1415-54192008000500003
Ameloblastic Fibro-Odontoma: A Diagnostic Challenge
Elen de Souza Tolentino,Bruna Stuchi Centurion,Marta Cunha Lima,Patrícia Freitas-Faria,Alberto Consolaro,Eduardo Sant'ana
International Journal of Dentistry , 2010, DOI: 10.1155/2010/104630
Abstract: An 11-year-old girl presented to our department to have a second opinion regarding a lesion involving her left mandible. She had previously undergone several radiographic exams including panoramic, helical, and cone-beam computed tomography. Radiographic examinations revealed a well-defined radiolucent region, which contained an irregular radiopaque mass of 3?cm in diameter, localized to the left angle of the mandible. Our presumptive diagnosis was complex odontoma. Excisional biopsy was performed, and microscopic features showed strands and islands of odontogenic epithelium showing peripheral palisading and loosely arranged central cells, identical to stellate reticulum, embedded in a myxoid cell-rich stroma resembling the dental papilla. Dentin and enamel were also presented. The diagnosis was ameloblastic fibro-odontoma, which is a rare mixed odontogenic tumor, derived from epithelial and ectomesenchymal elements that form the dental tissues. 1. Introduction Ameloblastic fibro-odontoma (AFO) is a benign, slow growing, expansile epithelial odontogenic tumor with odontogenic mesenchyme. It may inhibit tooth eruption or displace involved teeth although teeth in the affected area are vital [1–3]. Radiography shows a well-defined, radiolucent area containing various amounts of radiopaque material of irregular size and form [4, 5]. The lesions are usually diagnosed during the first and second decades of life [4–6]. It occurs with equal frequency in the maxilla and the mandible and with equal frequency in males and females [6]. Microscopically, the lesion is composed of strands, cords, and islands of odontogenic epithelium embedded in a cell-rich primitive ectomesenchyme, resembling the dental papilla. Many authors reported that AFO is not aggressive and can be treated adequately through a surgical curettage to the lesion without removal of the adjacent teeth [1, 4, 5, 7, 8]. This paper describes an extensive AFO in an 11-year-old girl. 2. Case Description An 11-year-old girl presented to our department on referral from another dentist to have a second opinion about a lesion involving the left mandible. She had radiographic examinations, including panoramic, helical, and cone-beam computed tomography. These examinations were accompanied by a presumptive radiographic differential diagnosis of “odontoameloblastoma”: complex odontoma and AFO. The medical, social and family histories were unremarkable, as were the results of a review of systems and a physical examination. The clinical examination did not display any sign of pain or swelling in the left
The purpose of Family Medicine A propósito da Medicina de Família
Ana Maria Sant?Ana
Revista Brasileira de Medicina de Família e Comunidade , 2010, DOI: 10.5712/rbmfc1(1)6
Abstract: This paper makes a reflection about some practical issues concerning the work of family doctors, highlighting some conflicts to be discussed to contribute to the improvement of the quality of the specialty and as a consequence, the delivery of quality services to the communities. Este trabalho faz uma reflex o sobre aspectos práticos do trabalho do médico de família no Brasil, e ao apontar áreas de atrito se prop e a provocar uma discuss o que contribua para o aperfei oamento da especialidade e desta maneira, dos servi os prestados às comunidades.
Comparative histomorphometric analysis between α-Tcp cement and β-Tcp/Ha granules in the bone repair of rat calvaria
Grandi, Gisela;Heitz, Claiton;Santos, Luiz Alberto dos;Silva, Miguel Luciano;Sant'Ana Filho, Manoel;Pagnocelli, Rogerio Miranda;Silva, Daniela Nascimento;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000020
Abstract: this study compared the effect of two bioceramics on the process of bone repair: α-tricalcium phosphate (α-tcp) cement and β-tricalcium phosphate hydroxyapatite particles (β-tcp/ha). calvarial defects were created in 50 rats, divided into two groups (α and β/ha). software was used at 7, 21, 60, 90 and 120 days to assess bone formation. mean new bone formation rates were as follows: α group, 1.6% at 7 days, 5.24% at 21 days, 24% at 60 days, 30.21% at 90 days and 50.59% at 120 days; β/ha group, 1.94% at 7 days, 2.53% at 21 days, 12.47% at 60 days, 26.84% at 90 days and 38.82% at 120 days; control group, 0.15% at 7 days, 10.12% at 21 days, 15.10% at 60 days, 18.94% at 90 days, 48.50% at 120 days. both materials are osteoconductive and biocompatible. perhaps the larger rate of new bone formation observed in the α-tcp group, it also occurs in the β-tcp/ha group within a longer time period.
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