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Search Results: 1 - 10 of 182030 matches for " Marcelo Suzart de;Cecon "
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Dinamica da Degrada??o Ruminal por Novilhos Mantidos em Pastagem Natural, em Diferentes épocas do Ano
Pereira, José Carlos;Almeida, Marcelo Suzart de;Cecon, Paulo Roberto;Queiroz, Augusto César de;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000300025
Abstract: this work was carried out to evaluate the ruminal degradation of dry matter, crude protein and neutral detergent fiber and ruminal particles and liquid phase dynamics by steers in natural pasture of the zona da mata, region of minas gerais state, during different seasons of the year. the season 1(s1) corresponded to the months of february/march/april, and the season 2(s2), to the months of august/september/october. five steers with esophageal and rumen fistulae, each one considered as a replicate, were used in a completely randomized design. the effective degradation of the dm, cp and ndf was higher in the s1 than in the s2. the cp degradation rate showed difference between seasons, being of 2.99%/hours in the s1 and 6.01%/hours in s2. the passage rate was higher in the s1 (4.84%/hours) in relation to s2 (3.59%/hour). the higher undegradable fraction of the nutrients could be the main responsible for the highest retention time and for the ruminal repletion of the fibrous fraction in the rumen. therefore, the highest ruminal repletion in the s2 (20.93 hours), in relation to s1 (14.84 hours), was probably due more to the physical effect of passage of the high undegradable fraction content, in that season, as compared to the s1, than the microorganisms fermentation.
Características Físicas da Digesta e Resistência de Partículas ao Escape do Rúmen-Retículo em Novilhos Mantidos em Pastagem Natural em Diferentes Esta es do Ano
Pereira José Carlos,Almeida Marcelo Suzart de,Queiroz Augusto César de,Cecon Paulo Roberto
Revista Brasileira de Zootecnia , 2002,
Abstract: O tamanho médio de partículas (TMP) e módulo de finura (MF) da dieta, da digesta ruminal e das fezes de novilhos, além da resistência relativa (RR) das partículas ao escape do rúmen-retículo, foram estudados em uma pastagem natural da Zona da Mata de Minas Gerais, durante a época 1 (E1), que abrangeu os meses fevereiro/mar o/abril, e época 2 (E2), correspondente aos meses de agosto/setembro/outubro. O TMP e MF da dieta selecionada pelos bovinos n o variaram entre a E1 (1,91mm e 3,62) e E2 (2,10 mm e 3,72). Na E1, o TMP e MF da digesta ruminal decresceram linearmente até o tempo de 24 horas, enquanto na E2 apresentaram comportamento quadrático, aumentando até o máximo de 1,62 mm e 3,31 nos tempos de 13,20 e 12,95 horas, respectivamente, após início da alimenta o. Para o TMP e MF das fezes, n o houve efeito do tempo de coleta, mas foram diferentes entre E1 (0,55 mm e 2,09) e E2 (0,45 mm e 1,90) e nos meses dentro da E1. A redu o do tamanho das partículas na E2 foi um fator limitante regulando a saída da digesta do rúmen, sendo que na E1 favoreceu o escape de partículas de tamanho médio. Ocorreu aumento contínuo na resistência ao escape das partículas do rúmen com o aumento do tamanho das partículas; partículas maiores que 1,19 mm escaparam do rúmen, apesar de enfrentarem resistência, e as partículas menores que este tamanho sofreram diferentes graus de resistência ao escape.
Dinamica da Degrada o Ruminal por Novilhos Mantidos em Pastagem Natural, em Diferentes épocas do Ano
Pereira José Carlos,Almeida Marcelo Suzart de,Cecon Paulo Roberto,Queiroz Augusto César de
Revista Brasileira de Zootecnia , 2002,
Abstract: Este trabalho foi conduzido para avaliar a cinética de degrada o ruminal da matéria seca, proteína bruta e da fibra e a dinamica de partículas das fases sólida e líquida no rúmen de novilhos em pastagem natural na Zona da Mata de Minas Gerais, durante diferentes épocas do ano. A época 1 (E1) compreendeu os meses de fevereiro, mar o e abril, e a época 2 (E2), os meses de agosto, setembro e outubro. O trabalho foi conduzido seguindo delineamento inteiramente casualizado, utilizando cinco novilhos dotados de fistulas no rúmen e no es fago, onde cada animal constituía uma repeti o. A degrada o efetiva da MS, PB e FDN foi maior na E1, e a taxa de degrada o da PB apresentou diferen a entre as épocas, sendo de 2,99%/hora na E1 e 6,01%/hora na E2. A taxa de passagem foi maior na E1(4,84%/hora) em rela o à E2 (3,59%/hora). A alta fra o indegradável dos nutrientes poderia ser a principal responsável pelo maior tempo de reten o e pela reple o ruminal da fra o fibrosa no rúmen. Portanto, a maior reple o ruminal na E2 (20,93 horas), em rela o à E1(14,84 horas), foi provavelmente devido mais ao efeito físico de passagem do alto teor da fra o indegradável, naquela esta o, quando comparado à E1, que ao da fermenta o pelos microrganismos.
Características Físicas da Digesta e Resistência de Partículas ao Escape do Rúmen-Retículo em Novilhos Mantidos em Pastagem Natural em Diferentes Esta??es do Ano
Pereira, José Carlos;Almeida, Marcelo Suzart de;Queiroz, Augusto César de;Cecon, Paulo Roberto;Braz, Sérgio Pereira;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000300024
Abstract: the average particle size (ps) and module of fineness (mf) of the diet, ruminal digesta and feces of steers, as well as relative resistance (rr) of the particles to escape of the reticulum-rumen, were studied in a native pasture of the zona da mata - minas gerais state, during the season 1 (s1), that corresponded to the months of february/march/april, and season 2 (s2), that corresponded to the months of august/september/october. the ps and mf of the diet selected by the bovine did not vary among the s1 (1.91 mm and 3.62) and the s2 showed (2.10 mm and 3.72). in the s1, ps and mf of the ruminal digesta linearly decreased until the 24 hours time, while, in the s2, presented a quadratic response, increasing up to a maximum of 1.62 mm and 3.31 in the 13.20 and 12.95 hours, respectively, after beginning of the feeding. for ps and mf of the feces, there was no effect of the collection time, but it were different between the e1 (0.55 mm and 2.09) and e2 (0.45 mm and 1.90) and in the months within the e1 season. the reduction of the particles sizes in the e2 was a restriction factor regulating the exit of digesta from the rumen, and in the e1, it favored the escape of medium particle sizes. a continuous increase in the resistance of the particles to escape from the rumen with the increase of the particle size was noticed; particles larger than 1.19 mm escaped from the rumen, in spite of face strong resistance, and the smaller particles than this size faces different degrees of resistance to escape from the rumen.
Evaluation of Antifungal Activity of Amaranthus viridis L. (Amaranthaceae) on Fusariosis by Piper nigrum L. and on Anthracnose by Musa sp.
Bruna Carminate,Giordano Bruno Martin,Roney Martinho Barcelos,Ivoney Gontijo,Marcelo Suzart de Almeida,Valdenir Jose Belinelo
Agricultural Journal , 2013, DOI: 10.3923/aj.2012.215.219
Abstract: The plants have investigated in the search for new substances against microorganisms resistant to current pesticides and antibiotics. The aim of this research was to evaluate the existence of antiphytopathogenic properties of organic extracts from the leaves of amaranth (Amaranthus viridis L.), Amaranthaceae, popularly known as caruru. The hexanic, dichloromethanic, ethylic acetate and ethanolic extracts were obtained, respectively with yields of 2.2, 2.4, 3.2 and 3.6% (m/m). These extracts were used to determine the Minimum Inhibitory Concentration (MIC), through dilution technique using 96 well microplate. After reading the CIM in wells where no fungal growth was observed, the Minimum Fungicidal Concentration (MFC) was determined on plates containing dextrose Sabouraud agar. The experiments with the extracts of Amaranthus indicates activity against the fungi Colletotrichum musae (Berk. and Curt.) Arx, causing anthracnose of banana and against Fusarium solani f. sp. piperis responsible for fusariosis in black pepper. In relation to Colletotrichum musae extracts obtained with dichloromethane, ethyl acetate and ethanol, the MIC ranged from 15.6-250.0 μg mL-1. The hexanic, ethylic acetate and ethanolic extracts showed activity against Fusarium solani with MIC ranging from 31.2-250.0 μg mL-1. Through this research was showed the presence of antifungal constituents in extracts of Amaranthus viridis L., revealing its potential antimicrobial effect against these two phytopathogenic strains tested.
Atividade predatória, crescimento radial e esporula??o de fungos predadores de nematóides Monacrosporium spp, submetidos à criopreserva??o
Campos, Artur Kanadani;Mota, Marcelo de Andrade;Araújo, Jackson Victor de;Cecon, Paulo Roberto;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000200020
Abstract: in vitro tests were performed to evaluate the effect of cryopreservation with or without addition of cryoprotectants (dmso or glycerol) in the predatory activity on cooperia sp and haemonchus sp infective larvae, radial growth and conidial production of two isolates of nematode-trapping fungus (monacrosporium sinense and m. appendiculatum). the predatory activity on cooperia and haemonchus sp infective larvae of the fungus submitted to the different preservations methods did not affected. the radial growth of the fungus cryopreserved with glycerol was higher (p<0.05), when compared to others treatments. the conidial production was higher (p<0.05) in the m. appendiculatum isolate preserved at 4oc in refrigerator.
Atividade predatória, crescimento radial e esporula o de fungos predadores de nematóides Monacrosporium spp, submetidos à criopreserva o
Campos Artur Kanadani,Mota Marcelo de Andrade,Araújo Jackson Victor de,Cecon Paulo Roberto
Ciência Rural , 2004,
Abstract: Testes in vitro foram realizados para avaliar o efeito da criopreserva o em nitrogênio líquido com e sem adi o de crioprotetores (DMSO ou glicerol), na atividade predatória sobre larvas infectantes de Cooperia sp e Haemonchus sp, crescimento radial e produ o de conídios de dois isolados de fungos predadores de nematóides (Monacrosporium sinense e Monacrosporium appendiculatum). A capacidade predatória dos fungos sobre larvas infectantes de Cooperia sp e Haemonchus sp dos fungos previamente submetidos aos diferentes métodos de preserva o n o foi afetada. O crescimento radial dos fungos criopreservados com glicerol 10% foi mais expressivo(p<0,05), quando comparado ao apresentado pelos fungos congelados com DMSO 10 % ou água. A produ o de esporos foi maior (p< 0,05) no fungo M. appendiculatum preservado a 4masculineC em geladeira.
Variation of Morpho-Agronomic and Biomass Quality Traits in Elephant Grass for Energy Purposes According to Nitrogen Levels  [PDF]
érik da Silva Oliveira, Rogério Figueiredo Daher, Niraldo José Ponciano, Geraldo de Amaral Gravina, José Augusto de Almeida Sant’ana, Romildo Domingos Gottardo, Bruna Rafaela da Silva Menezes, Paulo Marcelo de Souza, Cláudio Luiz Melo de Souza, Ver?nica Brito da Silva, Avelino dos Santos Rocha, Antonio Alonso Cecon Novo
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.611168
Abstract: Elephant grass is a tropical forage plant widely spread in Brazil, used mainly in the livestock sector and in cattle feeding. Because of its high productivity and photosynthetic capacity, this culture has also been considered an alternative source of renewable energy. Six clones of elephant grass (Pennisetum purpureum Schum.) were evaluated under five levels of nitrogen fertilization (100, 200, 400, 800, and 1600 kg·N·ha-1), in a randomized-block design with a split-plot arrangement with three replicates, from April 2010 to December 2012, in the city of Campos dos Goytacazes— RJ, Brazil. The objective was to obtain estimates of variation in morpho-agronomic traits and biomass quality. We observed that genotypes Cameroon-Piracicaba and Gua?u I/Z2 have great potential to be used, with maximum dry matter yields of 60.97 and 44.10 t·ha-1 per cut for energy purposes among the studied genotypes.
Conforto térmico e desempenho de pintos de corte submetidos a diferentes sistemas de aquecimento no período de inverno
Cordeiro, Marcelo Bastos;Tin?co, Ilda de Fátima Ferreira;Silva, Jadir Nogueira da;Vigoderis, Ricardo Brauer;Pinto, Francisco de Assis de Carvalho;Cecon, Paulo Roberto;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000100029
Abstract: the objective of this study was to evaluate the effect of different poultry house heating systems on the thermal comfort and performance of broiler chicks during the winter period, in the southern region of brazil. three buildings were used, each containing 17,700 broiler chickens (cobb), during two complete productive cycles. three heating systems were evaluated: furnace with indirect air heating; infrared heater and radiant experimental "drum" system with an infrared supplemental heating system. in order to evaluate the thermal environment and animal performance, a randomized block experimental design with three heating system was used, in two complete productive cycles. in the first two weeks after birth, the radiant experimental "drum" system is the most efficient in maintaining the air temperature and relative humidity in thermal comfort condition of the broiler chicks and, consequently, result in the best results of weigh gain, dietary conversion and efficient production.
Ambiente térmico e concentra??o de gases em instala??es para frangos de corte no período de aquecimento
Menegali, Irene;Tin?co, Ilda de F. F.;Baêta, Fernando da C.;Cecon, Paulo R.;Guimar?es, Maria C. de C.;Cordeiro, Marcelo B.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2009, DOI: 10.1590/S1415-43662009000700022
Abstract: currently, the national and international markets are stressing actions for environmental preservation, including data collection regarding concentrations or emission of harmful gases generated from animal production. the lack of information regarding this subject is the reason for this study which is to diagnose the concentrations of carbon monoxide and carbon dioxide associated with the thermal comfort of broiler chickens in poultry houses. two different types of air renovation for heating were studied: ventilation by negative pressure and by positive pressure, during winter in the southern region of brazil. for evaluation of the thermal environment, randomized blocks were used in split-plot design with two repetitions. the index of the black globe's temperature and humidity indicated the best conditions for thermal comfort environment in the first week of the life of the birds for positive pressure of the system. the highest gas concentrations were detected in the morning for both air renovation methods, with concentrations within the acceptable levels for good bird development.
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