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Search Results: 1 - 10 of 118882 matches for " Ivan Valad?o; "
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A etiologia da "cara inchada", uma periodontite epizoótica dos bovinos
D?bereiner, Jürgen;Dutra, Iveraldo dos Santos;Rosa, Ivan Valado;
Pesquisa Veterinária Brasileira , 2004, DOI: 10.1590/S0100-736X2004000100011
Abstract: a condensed version in portuguese of an extensive review on "cara inchada"-periodontitis of cattle, published in english, is presented with some additional information. this disease was responsible for severe losses of young cattle especially in the 1970's and 1980's in central brazil. due to the progressive periodontitis and the loss of teeth, the animals cannot eat properly, loose condition and may die. this was believed to be due to mineral deficiency or imbalance. however, field and laboratory observations and experiments over 30 years showed that it is a multifactorial infectious disease which can be defined as bovine epizootic periodontitis. it was concluded that there are three main factors required for its development: (1) cattle affected are at the age when premolar and molar teeth erupt; (2) bacteria of the bacteroides group are present in the subgingival spaces; (3) the ingestion with the forage of subinibitory concentrations of antibiotics, mainly streptomycin, produced by the large increase in the number of actinomycetes found in soils from pastures sown after recently cleared forest; this leads to an increased adherence of bacteroides spp to the gingival epithelium and to the progressive destruction of the periodontal tissues. nowadays, the disease has practically disappeared, because the disturbed soil microflora has reached the new equilibrium, and the occupation of virgin land for cattle raising has almost ceased. new outbreaks may occur with former problem-pastures when these are freshly cultivated as this again leads to a disequilibrium of the soil microflora and to increased antibiotic production. other antibiotics such as spiramycin and virginiamycin, administered orally or added to a mineral supplement, can control the disease.
Efeito do fósforo suplementar sobre o desempenho reprodutivo de vacas de corte em pastagem de Brachiaria humidicola
S'THIAGO, LUIZ ROBERTO LOPES;MORAES, SHEILA DA SILVA;NICODEMO, MARIA LUIZA FRANCESCHI;ROSA, IVAN VALADO;BRORING, NILSON;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000200023
Abstract: the objective of this experiment was to observe and quantify the effect of two mineral mixtures, as free-choice feeding, one without (m) and other with phosphorus supplement (mp), on the productive and reproductive performance of nellore beef cows grazing brachiaria humidicola. this work was conducted at the fazenda modelo (embrapa-centro nacional de pesquisa de gado de corte), located in terenos, ms, brazil, in two phases, 1st from 1988/92 and 2nd from 1992/94. during the 2nd phase, stocking rate, for the dry period, and suckling days were reduced (from 1.0 to 0.5 cows/ha and 210 to 90 days, respectively). mineral intake (m = 76 and mp = 112 g/had/day), forage phosphorus level (wet season = 0.16%; dry season = 0.11%), liveweight (1st phase: m = 363± 3.3 and mp = 371± 3.8 kg; 2nd phase: m = 407± 5.7 and mp = 417± 6.5 kg), birth percentage (1st phase: m = 67± 3.3 and mp = 66± 3.5; 2nd phase: m = 75± 6.3 and mp = 80± 5.7) and weaning of calves (1st phase: m = 86± 5.0 and mp = 91± 5.3; 2nd phase: m = 55± 6.4 and mp = 67±5.7) were measured. beef cattle is not responsive to p supplementation.
Uso de parametros ósseos, plasmáticos e fecais na determina o da deficiência de fósforo em bovinos
Nicodemo Maria Luiza Franceschi,Moraes Sheila da Silva,Rosa Ivan Valado,Macedo Manuel Cláudio Motta
Revista Brasileira de Zootecnia , 2000,
Abstract: Quinze novilhos Nelore foram distribuídos em três tratamentos, consistindo de dieta basal capaz de proporcionar ganhos da ordem de 600 g/dia, suplementada (15 ou 11 g P/dia) ou n o (5 g P/dia) com fosfato monoam nico, para determinar as altera es provocadas por deficiência de P em parametros ósseos, sangüíneos e fecais. Biópsias de costela foram obtidas aos 60 e 250 dias de experimenta o. Amostras de plasma foram coletadas quinzenalmente e amostras de fezes retais, analisadas em sete ocasi es, durante os 250 dias do experimento. Coleta total (diária) de fezes foi feita em dois períodos, aos 60 e 243 dias, durante sete dias. Aos 60 dias, P expresso em rela o ao osso fresco, osso seco e desengordurado e ao volume de osso discriminaram entre os tratamentos. Aos 250 dias, a espessura da camada cortical e as concentra es de cinzas e fósforo foram reduzidas na deficiência de P. Observou-se queda na concentra o de fósforo inorganico plasmático (Pi), já aos 12 dias de experimenta o, apresentando valores em torno de 3,0 mg % na época em que ganho de peso foi afetado (82 dias). Foi observada eleva o do Ca e da fosfatase alcalina na deficiência de P, sem altera es na concentra o de hidroxiprolina do plasma. As concentra es de P nas fezes aumentaram com a concentra o do elemento na dieta, mas a utiliza o de amostras coletadas do reto n o propiciou detec o precoce de deficiência de P. A defini o de níveis críticos para a determina o de deficiência apresentou problemas.
Avalia o de níveis de fósforo na dieta de novilhos Nelore em crescimento: efeitos no desempenho
Nicodemo Maria Luiza Franceschi,Moraes Sheila da Silva,Rosa Ivan Valado,Macedo Manuel Cláudio Motta
Revista Brasileira de Zootecnia , 2000,
Abstract: A adequa o das recomenda es de fósforo para novilhos Nelore em crescimento foi avaliada por meio do ganho de peso, do consumo e da convers o alimentar do alimento durante 250 dias. Quinze novilhos receberam dieta basal deficiente em P, adequada nos demais nutrientes, capaz de proporcionar ganhos de 500 g/d. A dieta foi suplementada (tratamento 1 = 15g P/dia e tratamento 2 = 11 g P/dia) ou n o (tratamento 3 = 5 g P/dia) com fosfato monoam nico. A deficiência de P n o afetou as digestibilidades in vivo da matéria organica medida aos 60 dias e ao final do experimento, nem a digestibilidade da matéria seca ao final do experimento. O consumo médio de matéria seca foi de 5,56; 5,28; e 3,69 kg/dia, nos tratamentos 1, 2 e 3, respectivamente. A deficiência de P provocou quedas no consumo, no ganho de peso e na convers o alimentar. Os novilhos de 300 kg alimentados com 11 g P/dia obtiveram ganhos de 500-600 g/dia, sem apresentar sinais de deficiência.
Efeito do fósforo suplementar sobre o desempenho reprodutivo de vacas de corte em pastagem de Brachiaria humidicola
S'THIAGO LUIZ ROBERTO LOPES,MORAES SHEILA DA SILVA,NICODEMO MARIA LUIZA FRANCESCHI,ROSA IVAN VALADO
Pesquisa Agropecuária Brasileira , 2000,
Abstract: O objetivo deste experimento foi observar e quantificar o efeito de duas misturas minerais (ad libitum), uma sem (M) e outra com fósforo suplementar (MP), sobre o desempenho produtivo e reprodutivo de vacas de cria neloradas em pastejo de Brachiaria humidicola. O trabalho foi realizado na Fazenda Modelo (Embrapa-Centro Nacional de Pesquisa de Gado de Corte), localizada em Terenos, MS, em duas fases, a primeira, em 1988/92, e a segunda, em 1992/94. Na segunda fase, reduziu-se a carga animal durante a seca e os dias de amamenta o (de 1,0 para 0,5 vacas/ha e de 210 para 90 dias, respectivamente). Foram realizadas medidas de consumo da mistura mineral (M = 76 e MP = 112 g/cab./dia); teor médio de fósforo na forrageira (época das chuvas = 0,16%, época seca = 0,11%); peso vivo (primeira fase: M = 363±3,3 e MP = 371±3,8 kg; segunda fase: M = 407± 5,7 e MP = 417± 6,5 kg); taxa de natalidade (primeira fase: M = 67±3,3 e MP = 66± 3,5%; segunda fase: M = 74± 6,3 e MP = 80± 5,7%) e bezerros desmamados (primeira fase: M = 86± 5,0 e MP = 91± 5,3; segunda fase: M = 55± 6,4 e MP = 67± 5,7). As vacas de cria n o responderam ao fósforo suplementar.
Avalia??o de níveis de fósforo na dieta de novilhos Nelore em crescimento: efeitos no desempenho
Nicodemo, Maria Luiza Franceschi;Moraes, Sheila da Silva;Rosa, Ivan Valado;Macedo, Manuel Cláudio Motta;Thiago, Luiz Roberto Lopes de S.;Anjos, Cláudio Ribeiro dos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000400033
Abstract: the adequacy of the recommendation of phosphorus for growing nellore steers was evaluated by means of the weight gain, feed intake and feed:gain ratio during 250 days. fifteen steers were fed a basal p-deficient but otherwise adequate in the other nutrients, enabling gains of 500 g/day. the diet was supplemented (treatment 1 = 15 g p/day, treatment 2 = 11 g p/day) or not (treatment 3 = 5 g p/day) with monoammonium phosphate. phosphorus deficiency did not affect organic matter in vivo digestibilities determined at 60 days and at the end of the experiment, nor dry matter digestibility at the end of the experiment. average dry matter intakes were 5.56, 5.28 and 3.69 kg/day, for treatments 1, 2 and 3, respectively. feed intake, weight gain and feed:gain ratio were reduced by phosphorus deficiency. steers fed 11 g of p/day gained 500-600 g/day without signs of deficiency.
Uso de parametros ósseos, plasmáticos e fecais na determina??o da deficiência de fósforo em bovinos
Nicodemo, Maria Luiza Franceschi;Moraes, Sheila da Silva;Rosa, Ivan Valado;Macedo, Manuel Cláudio Motta;Thiago, Luiz Roberto Lopes de S.;Anjos, Cláudio Ribeiro dos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000300029
Abstract: fifteen nellore steers were allotted to three treatments, consisting of a basal diet, which will be able to provide gains of about 600 g/day, supplemented (15 or 11 g p/day) or not (5 g p/day) with monoammonium phosphate in order to evaluate the alterations in bone, plasma and fecal measurements due to p deficiency. rib biopsies were taken at 60 and 250 days of trial, plasma samples were taken every 15 days, and fecal grab samples were analyzed in seven occasions along the trial. total daily fecal collection was performed in two occasions, at 60 and 243 days of the trial, for seven days. at day 60, p expressed as fresh bone, dried defatted bone and bone volume were able to detect treatment differences. at day 250, cortical thickness, p and ash concentrations were reduced in p deficiency. plasma inorganic p (pi) was lower at 12 days of trial, with values close to 3,0 mg % at the time where daily weight gain was affected (day 82). calcium and total alkaline phosphatase increased in p deficiency, without changes on the plasma hidroxyproline concentration. fecal p concentrations increased as the dietary p concentrations increased, but grab samples did not allow early detection of p deficiency. the definition of critical p levels for the determination of deficiency showed problems.
Abordagem reversa: novo paradigma no tratamento da metástase hepática sincr nica de cancer colorretal Reverse approach: a new paradigm in the treatment of synchronous liver metastasis from colorectal cancer
Marcus Valado
Revista do Colégio Brasileiro de Cirurgi?es , 2010, DOI: 10.1590/s0100-69912010000500001
Abstract:
O papel atual do cirurgi?o no tratamento do GIST
Valado, Marcus;Linhares, Eduardo;
Revista do Colégio Brasileiro de Cirurgi?es , 2009, DOI: 10.1590/S0100-69912009000300014
Abstract: recent progress in gastrointestinal stromal tumor's (gist) treatment were responsible for changing gist's natural history. knowlegde acquirement of molecular mechanism-based systemic therapy gave rise to the development of targeted antineoplastic drugs capable of reaching outcomes that had never been reached before. the introduction of imatinib in the clinical practice not only changed gist's patients survival but also shifted paradigms. however, besides all these new advances and the improved results with imatinib, the surgeon still plays a pivotal role in the management of the primary gist tumor and even in the metastatic setting.
Atualiza??o em GIST
Linhares, Eduardo;Valado, Marcus;
Revista do Colégio Brasileiro de Cirurgi?es , 2006, DOI: 10.1590/S0100-69912006000100012
Abstract: gastrointestinal stromal tumor (gist) has been recently the subject of considerable clinical and experimental interest. this focus is based on insights gained during the past years concerning its identification as a distinct clinical entity and the advances in knowledge about the diagnosis and management. historically, surgery has been considered the most effective treatment in spite of its limitations. others therapeutic approaches have been tryng without success, until the introduction of imatinib. this drug provided hopeful results in the treatment of this neoplasia. the idea that imatinib could improve surgical outcome have led to some clinical trials with the hope that this association (imatinib & surgery) could achieve good results.
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