oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 13 )

2019 ( 843 )

2018 ( 1014 )

2017 ( 961 )

Custom range...

Search Results: 1 - 10 of 606849 matches for " Torres C.A.A. "
All listed articles are free for downloading (OA Articles)
Page 1 /606849
Display every page Item
Concentra o plasmática de colesterol total e lipoproteína de alta densidade em novilhas mesti as doadoras de embri es tratadas com somatotropina bovina recombinante
Borges á.M.,Torres C.A.A.,Ruas J.R.M.,Carvalho G.R.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001,
Abstract: O objetivo do experimento foi o de estudar as concentra es plasmáticas de colesterol total e lipoproteína de alta densidade (HDL) em novilhas mesti as tratadas com somatotropina bovina recombinante (rbST). Coletas de sangue foram feitas durante dois ciclos estrais, normal e superovulado, em 26 fêmeas distribuídas em dois tratamentos: T1 = aplica o de 500mg de rbST no terceiro dia do ciclo estral utilizado para a superovula o e T2 = controle. Análises dos metabólitos sangüíneos foram feitas utilizando-se o método enzimático, cujas concentra es médias plasmáticas de colesterol total e de HDL durante o ciclo estral normal n o foram diferentes (P>0,05) entre os dois tratamentos: 87,9 e 25,8mg/dl e 85,9 e 26,7mg/dl para T1 e T2, respectivamente. O ciclo estral utilizado para a superovula o foi dividido em três períodos: P1 = do estro à insemina o artificial (0 ao15o dia), P2 = da insemina o artificial até a coleta de embri es (15o ao 21o dia) e P3 = da coleta até o final do período experimental (21o ao 27o dia). As concentra es plasmáticas de colesterol total e HDL no P1 n o diferiram entre os tratamentos (P>0,05). Em P2 e P3 houve diferen a nas concentra es de HDL e colesterol total entre os dois tratamentos: 29,0 e 88,5mg/dl (T1) e 27,1 e 81,8mg/dl (T2) no P2; e 30,4 e 88,0mg/dl (T1) e 26,6 e 80,5mg/dl (T2) no P3, respectivamente (P<0,01).
Dinamica folicular ovariana em novilhas mesti as Holandês-Zebu
Borges á.M.,Torres C.A.A.,Ruas J.R.M.,Rocha Júnior V.R.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001,
Abstract: O estudo do crescimento folicular ovariano foi realizado em 26 novilhas mesti as Holandês-Zebu, por meio de acompanhamento ultra-sonográfico diário a partir do dia do estro, por um ou dois ciclos estrais consecutivos. Foram medidos os diametros do maior e segundo maior folículos presentes em cada ovário, detectando-se predominancia de ciclos com três ondas de crescimento folicular (58,3%) sobre ciclos com duas ondas (33,3%). O início das ondas foi detectado nos dias 0,4 e 9,7 para os ciclos com duas ondas e nos dias 0,4, 8,2 e 15,9 para os ciclos com três ondas de crescimento folicular. Os diametros máximos dos folículos dominantes nos ciclos de duas ondas foram de 12,7 e 13,3mm e de 12,2, 10,0 e 11,7mm para os ciclos com três ondas. Para os folículos subordinados, os diametros médios foram de 7,0mm, independente do número de ondas. As taxas de crescimento folicular foram de 1,1 e 1,0mm/dia, e as taxas de atresia foram de 1,1 e 1,2mm/dia para os folículos dominantes e subordinados, respectivamente. Um animal apresentou quatro ondas de crescimento folicular, enquanto dois animais apresentaram um ciclo estral com apenas uma onda folicular.
Vitrifica o de ovócitos imaturos de bovinos utilizando etilenoglicol associado à trehalose e polivinilpirrolidona
Souza M.R.,Costa E.P.,Torres C.A.A.,Guimar?es J.D.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2003,
Abstract: Avaliaram-se os efeitos da vitrifica o de ovócitos imaturos de bovinos utilizando o etilenoglicol (EG) associado à trehalose e à polivinilpirrolidona (PVP). Utilizaram-se ovócitos provenientes de ovários de vacas abatidas em matadouro, distribuídos aleatoriamente em três tratamentos (T). TI - ovócitos n o desnudados e n o congelados, TII - ovócitos vitrificados com cumulus oophorus e TIII - ovócitos desnudados vitrificados. A percentagem de ovócitos recuperados e ovócitos com morfologia normal após a vitrifica o foi diferente entre TII e TIII (92,2 e 72,6%; 79,0 e 63,6%, respectivamente). Os ovócitos normais foram cultivados à 38,5oC em atmosfera de 5% de CO2 por 24 horas. Após o cultivo, os ovócitos foram fecundados e os embri es cultivados in vitro por sete dias. Foram encontradas diferen as entre tratamentos quanto às taxas de matura o nuclear, fecunda o e clivagem (83,9, 70,0 e 44,0%; 17,5, 23,7 e 5,1%; 0,0, 0,0 e 0,0% para os tratamentos I, II e III, respectivamente). Apenas no TI foram obtidas mórulas e blastocistos (21,4%). Os procedimentos de vitrifica o, segundo os protocolos utilizados, n o s o indicados para a criopreserva o de ovócitos imaturos de bovinos.
Utiliza??o de gonadotrofina cori?nica humana e cipionato de estradiol associado ao dispositivo de libera??o controlada de drogas para sincroniza??o de ovula??o em cabras da ra?a Saanen
Maffili, V.V.;Torres, C.A.A.;Pontes, R.A.M.;Guimar?es, J.D.;Prosperi, C.P.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2005, DOI: 10.1590/S0102-09352005000200012
Abstract: saanen nuliparous female goats were distributed in two experimental groups of eight animals each to synchronize the ovulation. on day zero, all animals were treated with controlled internal drug release (cidr-g?), dinoprost (5mg) and estradiol cipionate (ec; 1mg). on day 4, all animals were treated with ecg (250iu), and on day 5 the cidr-g? was removed. group 1 (t1) received 1mg of ec and group 2 (t2) received 250iu of hcg, 24 and 30 hours after cidr-g? removal, respectively. onset of estrus was observed in 7 and 8 goats of t1 and t2 groups, respectively. hcg treated goats remained in estrus for 42±6.9 hours, whereas ec-treated goats remained in estrus for 45±5.5 hours (p>0.05). none of the studied ovulatory characteristics were affected by treatments. the intervals between cidr-g? removal and ovulation in t1 and t2 groups were similar. both hcg and ec were equally efficient on inducing ovulation synchronically.
Sincroniza??o de estro em cabras da ra?a Saanen com esponja intravaginal e CIDR-G?
Maffili, V.V.;Torres, C.A.A.;Fonseca, J.F.;Moraes, E.A.;Pontes, R.A.M.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2005, DOI: 10.1590/S0102-09352005000500004
Abstract: two short synchronization protocols associated to the estradiol cipionate (ec) for estrus duration were compared. twelve saanen breed goats were used (eight multiparous (m) and four nuliparous (n)) in two treatments. t1 (n=4m and 2n) animals received an insertion of sponge intravaginal (id) impregnated with 60mg of medroxyprogesterone acetate, and t2 (n=4m and 2n) animals received a cidr-g?. at the device (d=0) insertion time, 1mg of ce was injected in animals from both treatments. on day 5, the id was removed and the animals were observed for estrus detection every six hours. ultrasonographic exams were performed daily during the device treatment and at every six hours after the estrus detection, up to 12 hours after the ovulation. a follicular regression occurred at the emergence of a new wave in the fifth day of the permanence of the device cidr-g? (day 0 = insertion device day). the estrus and pregnancy rates for goats were 5/6 and 1/5 for t1 and 6/6 and 2/6 for t2, respectively. intervals from removal of the device to the onset of estrus and from removal of the device to the end of estrus, and estrus duration, were 74.0±39.1h and 34.7±15.1h (p<0.05), 137.2±42.1h and 90.0±11.2h (p<0.05), and 63.2±24.9h and 55.3±17.2h (p>0.05), for t1 and t2, respectively. intervals from the onset of estrus to ovulation, from the end of estrus to ovulation, and from removal of the device to ovulation, were: 50.6±22.6h and 47.3±15.3h (p>0.05), -12.6±9.1h and -8.0±4.5h (p>0.05), and 124.6±34.1 and 82.0±12.4h (p<0.05), for t1 and t2, respectively. the ovulation number, diameter of ovulatory follicle (mm) and the ovulatory follicle growth rate were 1.2±0.45 and 2.33±1.03 (p<0.05), 8.4±2.4 and 6.2±0.1mm (p<0.05) and 2.4±0.97 and 2.9±1.67mm (p>0.05) for t1 and t2, respectively. the use of sponge and cidr-g? associated with the ce was effective in inducing estrus. the complete absence of luteolysis at the moment of the device withdrawal, showed a great variation for the studied traits.
Efeito de fontes de óleo e níveis de suplementa??o de vitamina E na ra??o sobre as características físicas e morfológicas do sêmen in natura de suínos
Moraes, E.A.;Torres, C.A.A.;Guimar?es, J.D.;Murgas, L.D.S.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2010, DOI: 10.1590/S0102-09352010000300004
Abstract: the addition of oil sources and dietary vitamin e supplementation was evaluated on the characteristics of fresh boar sperm. twenty-four mature dalboar 85 boars of proven fertility and in routine semen production for artificial insemination were randomly distributed in a factorial arrangement 2 x 3, with two oil sources, soy and salmon, and three antioxidant levels: 150, 300, and 450mg/kg of vitamin e. volume, total motile sperm, hyposmotic swelling test, percentage of live cell, and morphology did not differ (p<0.05) between the animals from the treatments. salmon oil improved (p<0.05) sperm vigor. the vitamin e added to the diet improved (p<0.05) the sperm concentration, and there was no difference between the oil sources (p>0.05). salmon oil treatment showed the lowest (p<0.05) concentration of total antioxidants in the semen. vitamin e and concentration of total antioxidant showed a linear effect (p<0.05). the semen vigor and the concentration of total antioxidants were improved by oil sources, but the sperm concentration was dependent on the levels of vitamin e. therefore, salmon oil can be used in the diet of male pigs.
Indu??o de estro em cabras da ra?a Toggenburg com dois diferentes dispositivos intravaginais
Maffili, V.V.;Torres, C.A.A.;Bruschi, J.H.;Fonseca, J.F.;Viana, J.H.M.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2006, DOI: 10.1590/S0102-09352006000300013
Abstract: twelve toggenburg breed nuliparous female goats were randomly assigned to two treatments intended to induce estrus. on day zero, animals on t1 (n=6) were treated with an intravaginal sponge impregnated with 60mg of medroxyprogesterone acetate plus 50μg of pgf analogue. the t1 goats received ecg (250iu) on day 4, and on day 5 the sponge was removed. the t2 goats (n=6) received cidr-g? as intravaginal sponge plus 50mg of pgf analogue. all goats expressed behavioral estrus, and the pregnancy rates were 83.3 (5/6) and 33.3% (2/6) for t1 and t2, respectively. the interval from withdrawal of the device to onset of estrus did not differ between treatments (p>0.05). ovulatory traits also were not affected by treatments. the interval between cidr-g? removal and ovulation for t1 and t2 goats were similar (p>0.05). both sponge and cidr-g were equally efficient in inducing the estrus behavior in goats.
Potencial reprodutivo de touros da ra?a Nelore submetidos a diferentes propor??es touro: vaca
Santos, M.D.;Torres, C.A.A.;Ruas, J.R.M.;Guimar?es, J.D.;Silva Filho, J.M.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2004, DOI: 10.1590/S0102-09352004000400011
Abstract: this study evaluated the reproductive potential of 20 nelore bulls, submitted to different bull:cow ratio. correlations among the serum testosterone concentration, scrotal circumference, sperm quality and libido were also estimated. the bulls selected by andrologic evaluation and the libido test were alloted to the following bull:cow ratio (treatments): 1:25 (t1), 1:50 (t2), 1:75 (t3) e 1:100 (t4), with five replicates per treatment. blood samples were collected to determine serum testosterone concentration. semen physical and morphologic characteristics, scrotal circumference and libido of the bulls did not differ among treatments. the pregnancy rate of the cows was not affected by treatments (means of 42.1, 66.5 and 71.0 % for breeding season of 30, 60 and 90 days, respectively). the testosterone concentration was not affected by treatments and the mean serum testosterone concentration was 4.04ng/ml, which peaked at 9am. the correlations between the libido, semen physical and morphologic characteristics, and the scrotal circumference of the bulls were low. nelore bulls with good sperm quality and libido supported a large number of cows, and the bull:cow ratio of 1:100 did not reduce the pregnancy rate.
Vitrifica??o de ovócitos imaturos de bovinos utilizando etilenoglicol associado à trehalose e polivinilpirrolidona
Souza, M.R.;Costa, E.P.;Torres, C.A.A.;Guimar?es, J.D.;Fagundes, L.M.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2003, DOI: 10.1590/S0102-09352003000500011
Abstract: this study aimed to evaluate the effects of vitrification procedure of immature bovine oocytes using ethylene glycol (eg) associated with trehalose and polivinylpyrrolidone on the percentage of recovered oocytes with normal morphology and nuclear maturation, fecundation and cleavage rates for in vitro cultivated embryos. ovary oocytes of slaughtered cows were randomly allotted to three treatments (t): ti - oocytes neither undenuded nor vitrified, tii - vitrified oocytes with cumulus oophorus, tiii - undenuded vitrified oocytes. the percentage of recovered oocytes and oocytes with normal morphology after vitrification was different for tii and tiii (92.2 and 72.6%, 79.0 and 63.3% for tii and tiii, respectively). all normal oocytes were cultivated at 38.5oc in atmosphere with 5% co2 for 24 hours. after culture, the oocytes were fecundated and the embryos were cultivated in vitro for seven days. the nuclear maturation, fecundation and cleavage rates for ti, tii and tiii were different (83.9, 70.0 and 44.0%, 17.5, 23.7 and 5.1%, 0.0, 0.0 and 0.0% for ti, tii and tiii, respectively). morulas and blastocysts were obtained only for ti (21.4%). these results indicate that the protocol used for vitrification procedure is not recommended for cryopreservation of immature bovine oocytes.
Libido de touros Nelore: efeito da propor??o touro: vaca sobre a taxa de gesta??o
Santos, M.D.;Torres, C.A.A.;Guimar?es, J.D.;Ruas, J.R.M.;Carvalho, G.R.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2003, DOI: 10.1590/S0102-09352003000300008
Abstract: the effect of the libido of the bulls on pregnancy rates at 30, 60 and 90 days of the breeding season was studied, and the correlations between the serum testosterone levels, seminal quality and libido were estimated. twelve bulls selected by andrologic evaluation and by the libido test, were randomly allotted to: treatments t1 and t2, three low libido bulls and three high libido bulls, respectively, in the bull:cow proportion of 1:75; and treatments t3 and t4, three low libido bulls and three high libido bulls, respectively, in the proportion of 1:100. no differences among bulls based on the serum testosterone levels were observed. bulls with high libido (proportion 1:75) provided larger pregnancy rate at 60 and 90 days (90.6 and 94.6%, respectively) of the breeding season, than low libido bulls in the same proportion (80.0 and 86.2%, respectively). the libido of the bulls in the proportion 1:100 had no effect on the pregnancy rates. the effect of bull:cow proportion on the pregnancy rate was not significant and no correlations between libido, seminal quality, scrotal circumference and serum testosterone levels were observed.
Page 1 /606849
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.