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Search Results: 1 - 10 of 34181 matches for " Rodrigues Marcelo Teixeira "
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Aplicabilidade dos campos 490 e 800-830 do formato MARC 21 para dados bibliográficos
Rodrigues, Márcia Carvalho;Teixeira, Marcelo Votto;
Ciência da Informa??o , 2010, DOI: 10.1590/S0100-19652010000300004
Abstract: this text presents the history and evolution of the fields 4xx - series statement fields of the marc 21 format for bibliographic data. recent change is discussed about the field 440 which was substituted by the fields 490 and 800-830. the application of the fields 490 and 800-830 is illustrated in the bibliographic records by examples mentioning their relation to the norms of the anglo-american cataloguing rules, 2nd edition, describing the impact of this change on bibliographic catalogs.
Influência da sele??o sobre a qualidade da dieta ingerida por caprinos com feno oferecido em excesso
Silva, José Humberto Vilar da;Rodrigues, Marcelo Teixeira;Campos, Joaquim;
Revista Brasileira de Zootecnia , 1999, DOI: 10.1590/S1516-35981999000600033
Abstract: the objective of this work was to evaluate the feeding behavior, dry matter intake, and performance in goats fed hays of ramie (boehemeria nivea g.), soybean (neonotonia wightii) and elephant grass (pennisetum purpureum schum., cv. napier), offered to allow an excess of 30 or 60%, above the intake measured in the previous day. thirty-six goats were allotted to a completely randomized design with six treatments in a factorial arrangement of 3 x 2 (hay and level of offer). the mean particle size of the hays was kept constant in 0.4 cm. the dry matter and crude protein intake increased as ramie hay was fed at 60% excess as compared to 30%. a reduction in the lignin intake occurred when the soybean hay was fed at the 60% level. conversely, a decrease in crude protein intake and an increase in fiber detergent acid and lignin were observed as the offer of elephant cv. napier grass varied from 30 to 60%. higher daily weight gain was observed for animals fed ramie hay. these results suggested that ramie hay was the best indication for the use in the feeding management of goats, with hays offered in excess
Desempenho de cabras leiteiras recebendo dietas com diferentes rela??es volumoso: concentrado
Silva, José Humberto Vilar da;Rodrigues, Marcelo Teixeira;Campos, Joaquim;
Revista Brasileira de Zootecnia , 1999, DOI: 10.1590/S1516-35981999000600032
Abstract: the objective of this work was to evaluate the effect of diets with different concentrate levels on feeding behavior of dairy goats. eighteen native brazilian dairy goats were allotted to a completely randomized design with three treatments and six replicates. three different diets in a total mixed diet were ad libitum feed to the animals, with variation in forage:concentrate ratio of 62:38, 52:48, to 42:58 as fed. the experiment period was of 131 days, with 26 days for adaptation and 105 days for the data collection period. the higher intake of cp and lower intake of ndf, adf and lignin were obtained as the percent of concentrate in the diet increased. the same pattern was observed for the ort material. less weight and milk production was obtained, respectively, with higher and lower f:c ratio diets. the quality of the total mixed diet had a direct effect on the ability to choose the feed, increasing the goats performance. the reduction of the particle size of the forage could minimize the selection of the concentrate present in a total mixed diets for goats.
Utiliza??o de fun??es matemáticas no estudo da curva de lacta??o em caprinos
Guimar?es, Vinícius Pereira;Rodrigues, Marcelo Teixeira;Sarmento, José Lindenberg Rocha;Rocha, Denis Teixeira da;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200028
Abstract: production of low cost milk is the most relevant aspect in dairy goat systems. therefore, studying the behavior of the lactation curve of dairy goats is important to implement animal breeding programs as well as for plan and introduce new management tools. the objective of this study was to select among mathematical models published in the literature the one that best describe the lactation curve of dairy goats. a dataset constituted of 23,502 observations of milk yield from 748 lactations of saanen and brown alpine (oberhaslis) goats was used. estimation of the parameters was done by the non-linear regression procedure of sas using the modified method of gauss-newton. residual plot, absolute mean deviation, correlation coefficient and visual appraisal of predicted versus measured lactation curve all were used to determine the best model. the equality of parameters and the models identity of non-linear regression were used to test if the parameters of the lactation curve were similar for breed and order of lactation. among the evaluated models, that proposed by nelder (1966), , was the best compromise for adjustment of the lactation curve of goats. even though differences among parameters of the chosen model for different lactation and breed were observed, only one equation was used in the analysis.
Consumo de nutrientes, produ??o e composi??o do leite de cabras da ra?a Alpina alimentadas com dietas contendo diferentes teores de fibra
Carvalho, Sérgio;Rodrigues, Marcelo Teixeira;Branco, Renata Helena;Rodrigues, Carla Aparecida Florentino;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000400029
Abstract: fifty alpine lactating does were used to evaluate the effects of feeding different levels of forage neutral detergent fiber (fndf) on nutrient intake and milk yield and composition. animals were housed individually and assigned to a completely randomized design with five treatments and ten replicates. a total mixed ration, containing tifton-85 (cynodon sp.) hay, ground corn, soybean meal and mineral mixture was fed ad libitum. the experimental diets contained 20, 27, 34, 41 or 48% of fndf. as dietary fndf increased, the intakes of dm, om, cp, ee, tc, nsc and net energy (ne) decreased linearly. in addition, increasing dietary fndf linearly increased intakes of ndf, fndf and adf. there was no effect of fndf level on contents of milk fat and milk total solids. however, milk yield, fat-corrected milk and yield of total solids all decreased linearly. the efficiency of utilization of metabolizable energy to milk yield reached a plateau at 35.4% of fndf.
Comportamento ingestivo de cabras Alpinas em lacta??o alimentadas com dietas contendo diferentes níveis de fibra em detergente neutro proveniente da forragem
Carvalho, Sérgio;Rodrigues, Marcelo Teixeira;Branco, Renata Helena;Rodrigues, Carla Aparecida Florentino;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200032
Abstract: the objective of this trial was to study the effects of different dietary levels of forage neutral detergent fiber (fndf) on feeding behavior of lactating goats. fifty alpine goats were randomly assigned to five treatments (ten replicates) in a completely randomized design. animals had free access to diets containing: 20, 27, 34, 41 or 48% of fndf. the total mixed ration was constituted of tifton-85 (cynodon sp.) hay and concentrate composed of ground corn (zea mays l.), soybean meal (glycine max l.), and minerals. diets were fed twice a day at 8:30 am and 4:30 pm. feeding behavior was determined by individual appraisal of animals every 10 minutes during 24 hours to measure eating, ruminating, and resting times. eating, ruminating, and total chewing times increased linearly whereas the opposite was observed for resting time when fndf levels ranged from 20 to 48% of the diet. linear decreases on feeding and rumination efficiencies both expressed as g dm/h, and a linear increase in the number of daily meals were observed with the increment of dietary fndf.
Genetic Variability among Genotypes of Physic Nut Regarding Seed Biometry  [PDF]
Leonardo Fardim Christo, Tafarel Victor Colodetti, Wagner Nunes Rodrigues, Lima Deleon Martins, Sebasti?o Batista Brinate, José Francisco Teixeira do Amaral, Bruno Galvêas Laviola, Marcelo Antonio Tomaz
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.510156
Abstract:

With probable center of origin in Brazil, the species Jatropha curcas L., known as physic nut, is a tropical oilseed with potential for cultivation aiming at the production of biodiesel. This study was conducted with the objective of investigating the genetic variability regarding the morphology of seeds of physic nut, using biometric analyses to identify variables that have potential for the study of the diversity of the species and the classification of genotypes. Seeds of 22 genotypes of physic nut, from the germplasm bank of Embrapa Agroenergia (Brazil) were evaluated regarding characteristics of size and mass. The genotypes of Jatropha curcas L. selected by the Brazilian breeding program presented high diversity for characteristics of the seeds, allowing the exploration of this genetic variability to classify genotypes in different groups. In addition, variables related to the biomass of the seeds present high relative contributions to the diversity observed in the genotypes.

Differential Growth of Genotypes of Physic Nut Conditioned by Nitrogen Fertilization  [PDF]
Tafarel Victor Colodetti, Leonardo Fardim Christo, Lima Deleon Martins, Wagner Nunes Rodrigues, José Francisco Teixeira do Amaral, Bruno Galvêas Laviola, Marcelo Antonio Tomaz
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.514228
Abstract:

The adequate supply of nitrogen is essential for the plant metabolism. This nutrient has an irreplaceable role on the vegetative and reproductive growth of physic nut; therefore the correct management of the fertilization is very important, particularly in tropical regions, which present considerable losses of nitrogen by leaching and volatilization processes. This study was made with the objective of evaluating the growth of genotypes of physic nut conditioned by nitrogen fertilization. The experiment was conducted in controlled environment, following a factorial scheme 12 × 4, with 12 Brazilian genotypes of Jatropha curcas L. and 4 levels of nitrogen fertilization (0%, 50%, 100% and 150% of the recommendation), in completely randomized design, with four replications. The growth of the genotypes was evaluated at 100 days of cultivation. Positive response to the increase in the nitrogen supply was observed in most genotypes, with gain in plant height, stem diameter, number of leaves, leaf area and root volume. The levels of nitrogen fertilization promoted differential growth between genotypes, being possible to identify genotypes with superior growth for each level.

Applicability of the Method of Linear Dimensions to Estimate Leaf Area in Improved Genotypes of Coffea arabica and Coffea canephora  [PDF]
Sebasti?o Vinícius Batista Brinate, Wagner Nunes Rodrigues, Lima Deleon Martins, Tafarel Victor Colodetti, Marcelo Antonio Tomaz, José Francisco Teixeira do Amaral
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.65070
Abstract: There are different methods to determinate leaf area in coffee plants; however, methodologies that allow measurement of leaf area accurately and in nondestructive ways are very important, as they are less economically costly and enable measurements on the same leaf over time, making it possible to describe accurate patterns of growth. The objective of this study was to investigate the applicability of the method to estimate leaf area using linear dimensions of leaves for improved genotypes of Coffea arabica L. and Coffea canephora Pierre ex A. Froehner. The experiment was conducted in two separated competition fields, each one following factorial schemes 10 × 2, with 10 genotypes and 2 methods to obtain the leaf area: measuring linear dimensions, and using equation model (estimated leaf area) and leaf area integrator (real leaf area). The genotypes for both Coffea arabica L. and Coffea canephora Pierre ex A. Froehner have different leaf areas, making it possible to discriminate groups of genotypes for both species using the size of their leaves as classification criteria. Even with the differences between genotypes, the pattern of leaf shape remains similar, confirming the applicability of the method to estimate leaf area using linear dimensions of leaves for improved genotypes, such as the model proposed by Barros, without the occurrence of loss of accuracy for the improved genotypes, for both Arabica and Conilon coffee, studied in this experiment.
Effect of Breed and Sex on Pork Meat Sensory Evaluation  [PDF]
Sandra Rodrigues, Alfredo Teixeira
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.57070
Abstract:

This work had an objective to evaluate the sensory quality of two categories of pork meat from a commercial pork meat and a selected meat from the Portuguese black pork (Preto Alentejano breed). Sixteen animals were used, 8 females and 8 males from each breed. Animals had 80 - 100 kg of live weight. The longissimus muscle between the 5th thoracic vertebra and the 10th lumbar vertebra was used in the analysis. Sensory analysis was performed by a trained taste panel of 10 elements, in 5 sessions. All evaluation conditions were standardized, and the attributes studied were odor intensity, toughness, juiciness and flavor intensity. The taste panel found differences mainly between breeds. The panellists scored Preto Alentejano meat as being juicier, tenderer, and with richer taste than Commercial meat. The higher juiciness score of Preto Alentejano meat was probably attributable to the higher intramuscular fat content compared with Commercial meat. The Commercial pork was characterized mainly by high toughness.

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