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Search Results: 1 - 10 of 25304 matches for " Alexandre Leseur dos; "
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Milk production and quality of Holstein cows in function of the season and calving order Produ o e qualidade do leite de vacas da ra a Holandesa em fun o da esta o do ano e ordem de parto
Rodrigo de Souza,Geraldo Tadeu dos Santos,Altair Ant?nio Valloto,Alexandre Leseur dos Santos
Revista Brasileira de Saúde e Produ??o Animal , 2010,
Abstract: It was aimed to evaluate the effect of the lactation order and calving season on milk production and quality of Holstein’s cows. The lactation order had a significant effect on milk production and score of somatic cells (SSC), without affecting fat and protein content. Cows of 3rd and 4th lactation were more productive due to the complete development of the mammary gland and corporal growth. SSC rose with the increase of the lactation number due to the contact with pathological agents as the animals had a more advanced age. Lactations that begin in the spring presented the smallest milk production (Kg/cow/day) because of the heat stress that these animals suffered in the lactation pick, with damage of milk production of this lactation. SSC, the fat and protein content did not vary in function of the calving season. Lactation order and calving season caused variation in the milk production, being important the use of strategies to minimize the heat stress mainly in the lactation pick. Larger careful should be taken with cows starting from 4th lactation, because these present a higher SSC, and the heat stress can favor the mastitis occurrence. Objetivou-se com este trabalho avaliar o efeito da ordem de lacta o e esta o do ano ao parto sobre a produ o e qualidade do leite de vacas da ra a Holandesa. A ordem de parto teve efeito significativo sobre a produ o de leite e escore de células somáticas (ECS), sem efeito sobre os teores de gordura e proteína. Vacas de 3a e 4a lacta o foram mais produtivas devido ao completo desenvolvimento da glandula mamária e crescimento corporal. O ECS aumentou com a eleva o do número de lacta es devido ao contato com agentes patogênicos à medida que os animais têm uma idade mais avan ada. Lacta es iniciadas na primavera apresentaram a menor produ o de leite (Kg/vaca/dia) por causa do estresse calórico que os animais sofreram no pico de lacta o, de modo a comprometer a produ o de leite dessa lacta o. ECS e teores de gordura e proteína n o variaram em fun o da época de pari o. Ordem de lacta o e esta o do ano ao parto causam varia o na produ o de leite, e é importante o uso de estratégias para minimizar o estresse calórico, principalmente no pico de lacta o. Maiores cuidados devem ser tomados com vacas a partir da 4a lacta o, pois apresentam maior ECS e o estresse calórico pode favorecer a ocorrência de mastite.
Avalia o de extratores e fitodisponibilidade de zinco para cultura do milho em Latossolo Vermelho eutroférrico = Evaluation of extractors and phytoavailability of zinc in corn crop in eutrophic latosol
Affonso Celso Gon?alves Jr.,?ngela Lemos Prestes,Ricardo Robson Trautmann,Alexandre Leseur dos Santos
Acta Scientiarum : Agronomy , 2006,
Abstract: A produtividade agrícola pode ser limitada pela deficiência de micronutrientes. Este estudo objetivou avaliar e testar extratores químicos (Mehlich1 e DTPA) na extra o de zinco em Latossolo Vermelho eutroférrico e determinar os teores deste metal no tecido vegetal de milho cultivado neste solo. O experimento foi conduzido em blocos casualizados com 4 repeti es. Os tratamentos foram realizados em esquema fatorial 3x3, sendo 3 formas de aduba o NPK, sem aduba o (testemunha), dose recomendada, duas vezes a dose recomendada de aduba o e três doses de zinco, 0,0; 5,0 e 10,0 mg dm3. Em teores elevados de Zn (solos argilosos), o DTPA foi mais eficiente, mas em menores teores o Mehlich1 mostrou maior capacidade de extra o. Em compara o com o DTPA, o extrator Mehlich1 apresentou melhor correla o entre as quantidades extraídas do solo e conteúdo foliar de Zn. A fitodisponibilidade de zinco foi proporcional aos teores presentes no solo. The agricultural productivity may be limited by the micronutrientsdeficiency. This study aimed at evaluating and testing chemical extractors (Mehlich1 and DTPA) for zinc extraction in corn crop in eutrophic latosol and determine the contents of this metal in the corn cultivated in this soil. The experiment was performed in randomized blocks, with 4 replications. The treatments were distributed in a factorial design 3x3, being 3 ways of manure activity as follows: no manure activity; recommended doses, twice the recommended doses and three doses of zinc: 0,0; 5,0 and 10,0 mg dm3.In high contents of Zn (loamy soils) DTPA was efficient, whereas in smaller contents Mehlich1 showed a more efficient extraction capacity. Compared to DTPA, the extractor Mehlich1 presented a better correlation between the soil and foliar extracted amounts of Zn. The phytoavailability of zinc was proportional to the contents in the soil.
Proteic supplements with and without sulfur sources on intake behavior of steers fed with low quality hay Suplementos proteicos com e sem fontes de enxofre sobre o comportamento ingestivo de novilhos alimentados com feno de baixa qualidade
Fernanda Granzotto,Antonio Ferriani Branco,Alexandre Leseur dos Santos,Julio Cesar Barreto
Semina : Ciências Agrárias , 2011,
Abstract: This experiment was conduct to study the effects of proteic supplementation and different sulfur sources added to supplements on the intake behavior, for cattle. Seven Holstein steers, weighing 442 kg ± 59 kg of live weight. The statistical design was a Latin square 7 x 7, and treatments consisted of the supplements use or no with addition or no of different sulfur sources: hay + supplement without sulfur (SWS), hay + sulfur 70S (S70), hay + sulfur 98S (S98), hay + calcium sulfate hemi-hydrated (CSH), hay + calcium sulfate di-hydrated (CSD), hay + ammonium sulfate (SFA) and hay without supplement (FSS). The Supplements affected in a positive way the feeding, chewing and resting activities. Steers without supplement (HWS) showed shorter total time of feeding, lower total time of chewing, and resting than steers with supplements. They had shorter meals and spent more time for rumination chewing per ruminal bolus, had lower efficiency of feeding (g DM/hour) and lower rumination efficiency (g of DM/hour and g of NDF/hour) as well as of the lower intake. SWS showed higher total time of rumination then supplements with different sulfur sources. The animals that had consumed supplements with sulfur, had presented lower number of rumination chews per day and per bolus, but they had not different to feeding efficiency and rumination. O presente experimento foi realizado com o objetivo de estudar os efeitos da suplementa o proteica e de diferentes fontes de enxofre adicionadas aos suplementos, sobre o comportamento ingestivo de bovinos consumindo feno de baixa qualidade. Foram utilizados sete bovinos, machos, castrados, da ra a Holandesa Preto e Branco com 442 kg ± 59 kg de peso vivo. O delineamento experimental utilizado foi o quadrado latino 7 x 7, e os tratamentos consistiram na utiliza o ou n o de suplementos com adi o ou n o de diferentes fontes de enxofre, conforme segue: feno + suplemento sem enxofre (SSE), feno + enxofre 70S (E70), feno + enxofre 98S (E98), feno + sulfato de cálcio hemi-hidratado (SCH), feno + sulfato de cálcio di-hidratado (E98), feno + sulfato de am nia (SFA) e feno sem suplemento (FSS). Os suplementos influenciaram de forma positiva as atividades de alimenta o, mastiga o e de ócio. Animais que n o foram suplementados (FSS) apresentaram menor tempo total de alimenta o, menor tempo total de mastiga o e de ócio que animais que receberam suplemento. Fizeram refei es mais curtas e despenderam mais tempo para mastiga es merícicas por bolo ruminal, apresentaram menor eficiência de alimenta o (g MS/hora) e menor eficiência de rumina
Produtividade do milho em resposta a aduba??o com NPK e Zn em argissolo vermelho-amarelo eutrófico e latossolo vermelho eutroférrico
Gon?alves Júnior, Affonso Celso;Trautmann, Ricardo Robson;Marengoni, Nilton Garcia;Ribeiro, Ossival Lolato;Santos, Alexandre Leseur dos;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000400043
Abstract: it's with the purpose of evaluating the production components and the corn crop productivity due fertilization with different doses of zn (zinc) an npk (nitrogen, phosphorus and potassium), this research has been done over the municipalities of palotina-pr, on eutrophic red-yellow argissol and marechal candido rondon - pr, on red eutroferric latossol. the treatments were arranged on a factorial scheme 3x3 constituting three doses of fertilization npk: no fertilization, once (30-100-50 kg ha-1) and twice the fertilization recommended (60-200-100 kg ha-1), based on the soil analysis. another factor under studying was the zn in different doses: 0,0; 5,0 and 10,0 mg dm-3. such parcels were corresponded to 3,6 m width by 6 m length. it were sowed 4 spaced lines with 0,9 m, using as a useful parcel the 2 central lines discarding 1,5 m of edging. the plant population was about 6,5 seeds by linear meter. considering the npk fertilization it was gotten a considerably increase for the components of seeds number, 1000 seeds mass and the productivity, being the dose 60 - 200 - 100 kg ha-1 the one that has given the best results on red eutroferric latossol and on eutrophic red-yellow argissol that has given a considerably increase on the 1000 seeds and productivity. according to the fertilization with zn, it has not given a considerably increase on both soils among the treatments for the evaluated components and productivity. with this word it can be concluded that the fertilization with npk increased the crop productivity on both soils while the fertilization with zn differences were not gotten over corn crop productivity.
Intera??o genótipo X ambiente em codornas de postura alimentadas com ra??es com dois níveis de energia metabolizável
Georg, Priscilla Cristina;Paiva, Emilia de;Conti, Ana Carolina Müller;Martins, Elias Nunes;Gasparino, Eliane;Santos, Alexandre Leseur dos;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000900009
Abstract: data of egg weight, albumen height, shell thickness, body weight and egg production at 90 days of laying from three lines of laying quails (coturnix coturnix japonica), fed diets with 2,900 kcal or 2,500 kcal metabolizable energy, were used to check the existence of the genotype-environmental interaction. the mtgsam software program was used, which allows bayesian inference, using the gibbs sampling, applied to an animal model, to estimate the co-variance components, heritability and genetic correlation between both environments. the results of heritability and genetic correlations showed that there was a genotype-environment interaction only for albumen height and shell thickness. the traits egg weight and body weight are susceptible to genetic gains regardless of the diet energy level, while egg production has low potential for genetic gains if the selection is based on partial records.
Genetic characterization of egg weight, egg production and age at first egg in quails
Hidalgo, André Marubayashi;Martins, Elias Nunes;Santos, Alexandre Leseur dos;Quadros, Thays Cristina Oliveira de;Ton, Ana Paula Silva;Teixeira, Rafael;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000100013
Abstract: the objective of this research was to estimate genetic parameters for the traits egg weight, egg production in 189 days and age at first egg in three laying quails and one meat line of quails. data was analyzed by bayesian procedures using gibbs sampling. the heritability estimates for egg weight, egg production in 189 days and age at first egg, were, respectively, for yellow line, 0.31, 0.84 and 0.53; for blue line, 0.14, 0.82 and 0.60; for red line, 0.70, 0.96 and 0.75; and for meat line, 0.73, 0.96 and 0.72. genetic correlation between egg weight and egg production in 189 days, egg weight and day at first egg and egg production in 189 days and day at first egg were for yellow line, 0.58, -0.77 and -0.90; for blue line, 0.09, -0.01 and -0.95; for red line, 0.09, 0.03 and -0.76 and for meat line, -0.18, 0.19 and -0.91, respectively. based on the probabilities of posterior parameter distribution overlap, the lines are divided in two different groups: one group with the yellow and blue lines and another with the red and meat lines.
Avalia o genética do ganho de peso e convers o alimentar de coelhos da ra a Nova Zelandia Branco criados em ambientes diferenciados = Genetic evaluation of weight gain and feed-to-gain ratio of White New Zealand rabbits raised in different environments
Alexandre Leseur Santos,Cláudio Scapinello,Elias Nunes Martins,Fernanda Granzotto
Acta Scientiarum : Animal Sciences , 2010,
Abstract: O objetivo do presente trabalho foi avaliar se a sele o para convers o alimentar (CA) e ganho de peso (GP), com base no desempenho individual e ou coletivo dos láparos, pode produzir ganhos genéticos em progênies criadas coletivamente, e animais submetidos à avalia o no período de 50 a 70 dias de idade, utilizando inferência Bayesiana. Realizaram-se seis análises bicaráter. No teste de desempenho foi observado que as características ganho de peso e convers o alimentar em ambos os ambientes tiveram valores para herdabilidade que variam de 0,42 a 0,60. Tanto a correla o genética 0,44 a 0,68 (GP) e 0,23 a 0,56 (CA) como a fenotípica 0,30 (GP) e 0,17 (CA) foram positivas para a mesma característica quando avaliada nos dois ambientes, coletivo ou individual, e foram negativas ou mesmo nulas, quando entre característica no mesmo ambiente ou em ambientes diferentes. Conclui-se que o uso do teste de desempenho em gaiolas individuais tanto para ganho de peso como para convers o alimentar, pode resultar em progresso genético quando suas progênies forem criadas em ambiente coletivo, visto que houve pequena mudan a na reclassifica o dosreprodutores de um ambiente para outro. This research evaluates whether the selection for feed-to-gain ratio (FGR) and weight gain (WG), based on individual and/or collective performance of rabbits, can lead to genetic gain in collectively-raised rabbit progenies. Animals were submitted to an evaluation period at the age of 50 to 70 days, using Bayesian inference. Six two-trait analyses were done. Performance testing observed WG and FC traits in both environments. Heritability values ranged from 0.42 to 0.60. Both the genetic correlation, 0.44 to 0.68 (WG) and 0.23 to 0.56 (FGR), and the phenotypic correlation, 0.30 (WG) and 0.17 (FGR), were positive when evaluated in the same trait between collective or individual environments; correlations between traits in the same or in different environments were negative, or almost null. It can be concluded that use of performance testing, in individual cages, for WG and FGR, can result in genetic progress when progenies are raised in collective environments, as there is a small re-classification of the breeders from one environment to another.
O dom e a tradi??o indígena Kapinawá (ensaio sobre uma no??o nativa de autoria)
Albuquerque, Marcos Alexandre dos Santos;
Religi?o & Sociedade , 2008, DOI: 10.1590/S0100-85872008000200004
Abstract: this article aims to analyze the native notion of authorship found in the kapinawá indian community, localized in pernambuco, northeast brazil. based on the notion of a historical anthropology, i analyze the authorship as an invented tradition that results from a political process of ethnic emergence. through the ethno history of this indian group, i present the context of construction of an indian tradition - the toré ritual - that legitimates itself by using categories pertaining to a religious tradition of northeast brazil called jurema's complex. by doing so, i intend to show the relation formed between the toré ritual and the emergence of a native notion of authorship constructed in it.
MOBILIZA O éTNICA NA CIDADE DE S O PAULO: O CASO DOS íNDIOS PANKARARU
MARCOS ALEXANDRE DOS SANTOS ALBUQUERQUE
Espa?o Ameríndio , 2007,
Abstract: ABSTRACT: This article aims to analyze the role of the masks (praiás) of the Pankararu Indians (PE) in the political mobilization in S o Paulo city, Brazil. At this place, the category of tradition works to close the demands and offer of goods and rights between Indians and the city of S o Paulo. The praiás have detached in this market because they are the elements which have most visibility in the public performances of these Indians. These performances took place inthe context of the insertion of these Indians into two kinds of market: the ethnical arts and Indians rights.RESUMO: Este artigo analisa o papel das máscaras (praiás) dos índios Pankararu (PE) na mobiliza o política que ocorre na cidade de S o Paulo, Brasil. Neste espa o, a tradi o funciona como categoria que aproxima a oferta e a demanda de tais bens e direitos entre índiose a cidade de S o Paulo. Os praiás se destacam neste mercado na medida em que estas máscaras s o os elementos que mais visibilidade vêm ganhando nas apresenta es destes índios. Tais apresenta es se d o no contexto de inser o destes índios em dois tipos demercado: o das artes étnicas e o dos direitos das popula es indígenas.
High-density hyperuniform materials can be transparent
Olivier Leseur,Romain Pierrat,Rémi Carminati
Physics , 2015,
Abstract: We show that materials made of scatterers distributed on a hyperuniform point pattern can be transparent at densities for which an uncorrelated disordered material would be opaque due to multiple scattering. The conditions for transparency are analyzed based on numerical simulations and simple theoretical arguments, and are not restrictive, thus opening possibilities for broad applications.
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