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Search Results: 1 - 10 of 178655 matches for " Dilceu Borges de;Pacheco "
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Grupo genético e heterose na produ??o de leite de vacas de corte submetidas a diferentes sistemas de alimenta??o
Restle, Jo?o;Senna, Dilceu Borges de;Pacheco, Paulo Santana;Padua, Jo?o Teodoro;Vaz, Ricardo Zambarda;Metz, Patrícia Alessandra Meneguzzi;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000400030
Abstract: the objective of this trial was to evaluate the milk yield of cows of two breeding systems, straightbreds charolais (ch) and nellore (ne) and, crossbreds f1 ?ch ?ne and ?ne ?ch, submitted to different feeding systems, as well as measure the resultant heterosis. the milk yield was determined at 14, 42, 70 and 90 days, being this last one coincident with weaning. eighty-six cows were used, and submitted to one of the following feeding systems: np: cows maintained exclusively on native pasture (np); cp + np: cows maintained on cultivated pasture (cp) from july 15th until september 15th and the rest of the time on np; and np + cp: cows maintained on cp from september 15th until november 15th, and the rest of the time on np. cp was composed by oat (avena sativa), ryegrass (lollium multiflorum) and clover (trifolium vesiculosum). since no significant difference was verified between cp + np and np + cp feeding systems, they were combined in one feeding system (ncp). cows maintained on np showed lower average daily (3.93 vs. 5.46 l) and total milk yield (291.4 vs. 401.7 l), in relation to cows maintained on ncp, as well as displayed higher reduction of the milk yield (39 vs. 27%, respectively). average daily and total milk yield were not affected by cow genetic group within breeding system. f1 cows showed higher milk yield during the whole lactation period, being the heterosis for average daily milk yield more expressive for cows maintained on lower feeding conditions, exclusively on np (92.4%) in relation to cows with access to ncp (18.1%). the lactation persistency was higher for cows sired by ne bulls than for cows sired by ch bulls, and for straightbreds in relation to f1 cows.
Efeito de grupo genético e heterose sobre a idade e peso à puberdade e sobre o desempenho reprodutivo de novilhas de corte
Restle, Jo?o;Polli, Volmir Antonio;Senna, Dilceu Borges de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000400023
Abstract: the effect of breed and heterosis on age and weight at puberty and reproductive performance at the first breeding season of beef heifers were evaluated. seventy four charolais (c), nellore (n), ? cn and ? nc females, born in 1987 and 1988, were used. the females were kept on cultivated pasture during the first and second winter, and on native pasture the rest of the time. heterosis for live weight at the different ages, ranged from 12.8 to 14.6%. crossbred heifers, ? cn and ? nc, reached puberty 89 days earlier than straightbreds, resulting a heterosis of -12.9%. average age at puberty was 623, 754, 568 and 634 days, respectively, for c, n, ? cn and ? nc. average live weight at puberty was 352, 299, 323 and 368 kg, respectively. heterosis for percentage of heifers showing heat until 18, 24 and 28 months of age was 76.9, 67.6 and 17.6%, respectively. the percentage of heifers pregnant at the end of the first breeding season, 25 to 28 months, was 94.4, 53.4, 99.4 and 97.5%, respectively, for c, n, ? cn and ? nc. heavier heifers at weaning and at 12 months reached puberty earlier, being the correlation coeficients of -.39 and -.56, respectively.
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999001100020
Abstract: carcass characteristics of charolais x nellore steers, weaned at two ages: 90 (t90) or 210 days (t210) were evaluated. sixty-three castrated calves, finished on avena strigosa + lolium multiflorum + trifolium vesiculosum pasture and slaughtered at twenty-four months of age, were used. no significant differences were observed between treatments for final weight (t90=437 kg and t210=467 kg), dressing percentage (t90=53.33% and t210=52.21%), hot carcass weight (t90=233 kg and t210=244 kg) and cold carcass weight (t90=226 kg and t210=238 kg). carcasses of the two treatments showed similar conformation (t90=10.8 points and t210=11.0 points). also the forequarter, side and hindquarter percentages were similar between treatments, likewise no significant differences were observed for carcass, leg and arm length, arm perimeter and cushion thickness. subcutaneous fat thickness did not differ between the two carcass groups (t90=2.56 mm and t210=2.27 mm). results demonstrate that early weaning at ninety days of age does not affect carcass traits of steers slaughtered at twenty-four months of age, if adequate nutrition is provided during growing and finishing periods.
Desempenho de vacas Charolês e Nelore desterneiradas aos três ou sete meses
Restle, Jo?o;Vaz, Ricardo Zambarda;Alves Filho, Dari Celestino;Bernardes, Régis Augusto de Lima Carvalho;Pascoal, Leonir Luiz;Senna, Dilceu Borges de;Polli, Volmir Antonio;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000200029
Abstract: the experiment evaluated the performance of charolais (c) and nellore (n) cows of three age classes, young (3 and 4 years), adult (5 to 7 years) and old (8 or more years), weaned at three (early weaning) or seven months in the fall (traditional weaning). the weight of the cows at the fall was 45 kg higher for the cows weaned at three months (t3) than for the cows weaned at seven months (t7). the body condition at seven months was also better for t3 cows (3.3 vs. 2.1 points). the t3 cows had higher weight gain from calving to the end of the reproductive period and showed higher percentage of estrus (81 vs. 51%), of pregnancy (67.2 vs. 37.3%) and shorter interval between calving and first estrus (102 vs. 114 days) than t7 cows. adult cows displayed better body condition at seven months and showed higher reproductive performance than young and old cows. the difference in pregnancy rate between t3 and t7 was more evident in young cows (42.11 vs. 12.5%) and old cows (51.72 vs. 35.71%) than in adult cows (62.5 vs. 53.33%). the c cows were heavier then n cows, at calving, at three and seven months, and displayed better body condition at seven months. the effect of early weaning on reproductive performance was more evident for c cows. the pregnancy rate of c cows was 80.6% for the t3 and 41.9% for the t7, while for the n cows the percentages were 45.5 and 30.0%, respectively, for t3 and t7. for c cows, milk production and the calves (presence and suckling) showed a stronger suppression on reproduction, than for n cows.
Estimating Emission of Leaves Seedlings Forest in Different Shading Levels, at Conditions of Transition Amazon-Cerrado, Brazil  [PDF]
Emanoeli Borges Monteiro, Cátia Cardoso da Silva, Andréa Carvalho da Silva, Adilson Pacheco de Souza
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.515247

This study determined the thermal requirements of forest native seedlings (Hymenolobium petraeum and Parkia pendula) and exotic seedlings (Adenanthera pavonina and Cassia fistula) all belonging to Fabaceae family, in three shading conditions (full sun, 50% and 65% of global radiation attenuation by poliefinas black screens). Also they were estimated of leaf emergence by Phyllochron and the Wang and Engel models, on climatological conditions at Sinop (Region of Transition Amazon-Cerrado), Mato Grosso State, Brazil, for winter period (between June and August of 2012). The minimum (Tb) and maximum (TB) basal temperatures and the optimum temperature (Topt) of growth of each species were estimated by regressions between relative growth rates and minimum, maximum and average temperatures, respectively. The values of the estimated Tb were 15.0°C, 16.4°C, 14.5°C and 14.6°C; to

Chemical Quality Indexes of Mullet (Mugil platanus) Stored on Ice  [PDF]
Sabrina da Costa Silva Andrade, Eliane Teixeira Mársico, Ronoel Luiz de Oliveira Godoy, Sidney Pacheco, Robson Maia Franco, Sérgio Borges Mano, Carlos Adam Conte-Junior
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.511114
Abstract: The present study was conducted aiming at establishing chemical quality parameters to assess ice stored mullet (0 ± 1) through the evaluation of nucleotide (adenosine monophosphate [AMP], inosine [HxR] and hypoxanthine [Hx]) degradation, biogenic amine (histamine [HI], putrescine [PU], cadaverine [CA] and tyramine [TI]) quantification and mesophilic and psychrotrophic bacteria count monitoring. The microbial load of 7 log CFU·g1 established as maximum acceptable limit was attained after the 20th day of ice storage. IMP concentration declined during the storage period to levels below the detection limit. HxR content increased only up to time T3 and then declined. Hx level increased during all the storage period. CA and HI content increase was not observed, on the other hand, PU and TI contents significantly increased (p < 0.05) at time T5. We concluded that IMP and Hx concentrations can be adequate parameters to assess mullet quality under the study conditions. HxR proved to be adequate to evaluate the freshness of mullet in the first days of storage while the amines, PU and TI, can be used to assess loss of quality. Mullet obtained in conditions similar to those of the present study and maintained at 0 ± 1can be consumed up to the 20th storage day.
O significado de aprender para alunos de uma escola agrotécnica
Borges, Rita de Cássia Pereira;Carvalho, Washington Luiz Pacheco de;
Ciência & Educa??o (Bauru) , 2005, DOI: 10.1590/S1516-73132005000300007
Abstract: this study aimed at revealing the meaning of learning among students of a technical high school. as what was intended to be understood were the meanings of learning, it was necessary to obtain descriptions of the people who were experiencing this phenomenon.. a phenomenological approach was used and the data was comprised of observations and interviews. from these, the structures of the phenomena were described inside the discourses, in the na?ve descriptions, in the class observations and in the interviews. from the ideographic and nomothetic analysis of the descriptions, it was possible to obtain hints of how the students understood the phenomena. so, the meanings were obtained in a phenomenological reduction process. in the search of convergences and divergences of meanings among the students, the invariance and the categories that expressed relevant aspects of the phenomena were emphasized. the convergences obtained showed that the meaning of learning encompasses "the sense of learning", the "context of learning" and the "affectiverelational relationship in learning". as a conclusion, a reflection about the meaning of learning for those students and its possible implication to knowledge is suggested.
Antibioticoprofilaxia em cirurgias de c es e gatos: necessidade e realidade Antibiotic prophylaxis in surgery of dogs and cats: the necessity and the reality
Daniel Pontes Braga,Andréa Pacheco Batista Borges,Tatiana Borges de Carvalho,Letícia Corrêa Santos
Revista Ceres , 2012,
Abstract: A administra o profilática de antimicrobianos tem por objetivo evitar a contamina o do ferimento cirúrgico, após exposi o a algum micro-organismo e antes da instala o do processo de infec o, devendo alcan ar e manter concentra es antimicrobianas inibitórias, no local da incis o, durante todo o procedimento cirúrgico, a fim de evitar o crescimento de patógenos contaminantes. Na medicina veterinária, a antibioticoprofilaxia é claramente aceita como importante medida da redu o e controle da incidência de infec es do sítio cirúrgico. Este estudo objetivou avaliar a utiliza o de antibióticos nos procedimentos cirúrgicos, realizados na clínica cirúrgica de c es e gatos do Hospital Veterinário da Universidade Federal de Vi osa, considerando a sua necessidade e a realidade. A popula o para o estudo foi constituída dos pacientes submetidos a tratamento cirúrgico, no período de 11 de maio a 11 de novembro de 2007. A utiliza o de antibióticos nos procedimentos estudados n o foi padronizada ou alterada, para realiza o deste estudo. Assim, concluiu-se que é necessário estabelecer critérios para a antibioticoprofilaxia, bem como sua padroniza o no Hospital Veterinário da Universidade Federal de Vi osa, para corrigir possíveis falhas no processo de preven o das infec es do sítio cirúrgico. Antimicrobial prophylaxis aim at preventing surgical wound contamination after the exposure to any microorganism and before infection is established. Inhibitory antimicrobial concentrations should be reached and maintained on the incision throughout the entire surgical procedure in order to prevent microbial growth. In veterinary medicine, antimicrobial prophylaxis is clearly disclosure and accepted as an important action to control and reduce the incidence of surgical wound infection. This study evaluated the use of antibiotics in small animals' surgeries at the Veterinary Hospital of the Universidade Federal de Vi osa, comparing the need and the reality. The population in study consisted of patients undergoing surgical procedures from May 11 to November 11, 2007. The routine use of antibiotics was not altered in any way for this study. The results showed that it is necessary to establish some criteria for the use of antimicrobials at the Veterinary Hospital of the Universidade Federal de Vi osa as well as the standardization of the same to correct possible failures in the process of surgical site infection.
Desempenho de idosos em um teste de fala na presen?a de ruído
Calais, Lucila Leal;Russo, Ieda Chaves Pacheco;Borges, Alda Christina Lopes de Carvalho;
Pró-Fono Revista de Atualiza??o Científica , 2008, DOI: 10.1590/S0104-56872008000300002
Abstract: background: speech perception of elderly, in silence and in the presence of background noise. aim: to characterize and compare the hearing abilities of elderly in a monaural speech perception test, in the presence and absence of background noise (speech discrimination test - sdt and speech perception in noise - spin). method: participants of this study were 55 subjects of both genders, 60 years old or above, distributed in two groups: control group (cg), constituted by elders with no hearing loss and study group (sg), constituted by elders with symmetrical sensorineural hearing loss. the spin test was used, initially with the presentation of a word list in silence and later in the presence of speech noise. results: no difference was observed between genders in the sdt and the spin test. correlation with age was observed only in the sdt for sg. a significant difference was observed when comparing the performance of the groups in the sdt and spin test. regarding the presence of substitutions in the articulation of words, it was observed that it occurred in both groups and was more frequent in spin test, especially for the sg. conclusion: the presence of the noise during the production of speech sounds is disadvantageous for elders, independently of the presence of hearing loss, but having a higher impact for those with hearing loss problems.
Estrutura foliar de curauá em diferentes intensidades de radia??o fotossinteticamente ativa
Oliveira, Elaine Cristina Pacheco de;Lameira, Osmar Alves;Sousa, Fernanda Ilkiu Borges de;Silva, Rolf Junior Ferreira;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008000200002
Abstract: the aim of this work was to characterize the leaf anatomy of ananas comosus var. erectifolius and to compare the anatomical characterists of its leaf fibres, when submitted to two levels of photosynthetically active radiation (54 and 100%). for the analysis of the anatomical structures, specially the fibres, the settled botanical material was submitted to techniques of dissociation of the foliar epidermis, microscopic number of stomata per square millimeter, cuts and scanning electron microscopy. the epidermis was coated for thick cuticle and developed well in leaves in the two intensity indexes of radiation. for leaves at 100% par a fast increase of thickness was observed in the apical and basal regions. regarding the radiation levels, differences were observed in the number of layers, the height of palisade parenchyma, and in the amount of fibre beams. the amount of fibre beams was bigger at 54% than at 100% par.
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