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Search Results: 1 - 10 of 364962 matches for " Raphael de Paula D;Carvalho "
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Correla??o entre caracteres e estima??o de parametros populacionais para batata-doce
Gon?alves Neto, álvaro C;Maluf, Wilson Roberto;Gomes, Luiz Antonio A;Maciel, Gabriel M;Ferreira, Raphael de Paula D;Carvalho, Regis de C;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000400025
Abstract: sweetpotato cultivars currently grown were selected essentially for their use in human consumption, with little regard for their other potential uses such as ethanol production or animal feed. the objective of this work was to estimate population parameters and genotypic, phenotypic and environmental correlations associated with these traits. thirty-nine sweetpotato genotypes from the germplasm bank of the universidade federal de lavras were assayed in a randomized complete block design trial with 2 replications. the estimated genetic (cvg) and environmental (cve) coefficients of variation, the broad sense heritabilities (ha2) and the b= cvg/cve ratio favor selection of the majority of the traits analysed, with estimates generally higher than 9.52%, 1.44 and 79.31% for cvg, cvg/cve and ha2, respectively. for all pairs of traits studied, the genotypic and phenotypic correlations had the same sign, and were similar in both magnitude and level of significance. in the cases where correlations were significant, the estimates of the genotypic correlations were slightly higher than those of the phenotypic correlations, and both were higher than environmental correlations as was observed between total fresh root yield x percentage of dry matter in roots, percentage of dry matter in the leaves+vines x total fresh root yield, mean root shape ratings x general root shape ratings. no genetic or phenotypic correlation was observed beetween percentage of root dry matter and measured root density. the selection and recommendation of sweet potato genotypes based on a set of these studied characteristics (depending on the segment of market to be explored), will make possible the complete use of this precious vegetable genetic resource, and its more intense adoption in national agriculture.
Rheological Study of Polymers Used as Viscosity Index Improvers for Automotive Lubricant Oils  [PDF]
Ana Paula Pena Almeida, Ana Paula Lelis Rodrigues de Oliveira, Cynthia D’ávila Carvalho Erbetta, Ricardo Geraldo de Sousa, Roberto Fernando de Souza Freitas, Maria Elisa Scarpelli Ribeiro e Silva
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.512110
Abstract:

In this work, a rheological study of automotive lubricant oils, neutral light paraffinic (NLP) and neutral medium paraffinic (NMP), additivated with two commercial viscosity index improvers-VIIs, based on hydrogenated poly (isoprene-co-styrene), at different concentrations, was carried out. The study included the determination of the kinematic viscosity of the mixtures, the calculation of the viscosity indexes and their behavior when subjected to various rheometric experiments, including stress sweep, steady state flow, creep and recovery, and temperature ramp oscillatory tests. The obtained results showed the efficacy of the additives as viscosity index improvers, enabling a significant increase in the viscosity index of the pure oils at relatively low concentrations. The determination of the storage (G’) and of the loss (G”) moduli for the mixtures oil/VII additives showed a large predominance of the viscous effect over the elastic one. Except when under low shear stress, the mixtures showed a pseudoplastic behavior, with the flow curves being adjusted to fit the Ostwald-de-Waele model (Power Law), with negative flow behavior indexes.

Occurrences of Eimeria spp. and gastrointestinal nematodes in dairy calves in southern Minas Gerais, Brazil Ocorrência de Eimeria spp. e nematódeos gastrintestinais em bezerros no sul de Minas Gerais, Brasil
Fábio Raphael Pascoti Bruhn,Fidelis Ant?nio Silva Júnior,André Henrique de Oliveira Carvalho,Débora Ribeiro Orlando
Revista Brasileira de Parasitologia Veterinária , 2012, DOI: 10.1590/s1984-29612012000200019
Abstract: The aim of this cross-sectional observational study was to determine the frequency and factors associated with infection by Eimeria spp. and gastrointestinal nematodes in 356 calves on 20 dairy farms located in southern Minas Gerais, Brazil. Ten species of Eimeria spp. were identified, of which E. bovis (37.6%) and E. zuernii (17.9%) were the most frequent. From fecal cultures, four genera of gastrointestinal nematodes were recovered, of which Cooperia spp. (74.6%) and Haemonchus (19.4%) were the most frequent. Variables relating to higher levels of technology used on dairy farms showed a significant association (p < 0.05) with higher OPG and EPG counts, and are discussed in this study. O objetivo deste estudo foi determinar a frequência e os fatores associados à infec o por Eimeria spp. e nematódeos gastrintestinais, em 356 bezerras provenientes de 20 rebanhos leiteiros, localizados no sul de Minas Gerais, Brasil. Foram identificadas dez espécies de Eimeria spp., sendo E. bovis (37,6%) e E. zuernii (17,9%) as mais frequentes. Nas coproculturas, foram recuperados quatro gêneros de nematódeos gastrintestinais, sendo os mais frequentes Cooperia spp. (74,6%) e Haemonchus spp. (19,4%).Variáveis relacionadas a um maior nível de tecnifica o das propriedades leiteiras apresentaram associa o significativa (p < 0,05), com maiores contagens de OoPG e OPG, e s o discutidas neste estudo.
Uso da vinha?a no abacaxizeiro em solo de baixo potencial de produ??o
Paula, Miralda Bueno de;Holanda, Francisco Sandro Rodrigues;Mesquita, Hugo Adelande;Carvalho, Vania Déa de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000700014
Abstract: an experiment was carried out in order to evaluate the stillage as k source for pineapple (ananas comosus l.) in comparison with kcl, and the effects on chemical soil characteristics. the experiment was assessed in a red yellow latosol with smooth cayenne cultivar. the treatments consisted of four application doses of stillage (0 - 100 - 200 - 400 m3/ha) and of an additional treatment (12 g/plant k2o kcl). the design of the trial was in randomized blocks with three replications. yields statistically responded to stillage and kcl and yields obtained with 400 m3/ha of stillage and 20.5 g of kcl per plant were 70% and 73%, respectivelly, over the control. addition of k increased the content of tritratable acidity and total soluble solids in the fruit with no difference between the sources. concentration of k in the leaves increased and mg content decreased by stillage and kcl application. addition of stillage in the soil increased k, ca, mg content and leached k to 20-40 cm depth. stillage and kcl increased k to adequate levels in the bases sum.
Práticas alimentares de crian as desnutridas menores de dois anos de idade Hábitos alimentarios de ni os malnutridos menores de dos a os de edad Feeding practices for malnourished children under two years old
Paula Chuproski,Priscila Antunes Tsupal,Maria Candida de Carvalho Furtado,Débora Falleiros de Mello
Revista Gaúcha de Enfermagem , 2012,
Abstract: Analisar práticas alimentares de crian as desnutridas menores de dois anos. Estudo exploratório e descritivo, com análise qualitativa dos dados, realizado a partir de observa o participante e entrevistas. Participaram 42 sujeitos. Os dados foram submetidos à análise temática. Ao explorar as práticas alimentares dessas crian as, os temas que emergiram foram: quem prepara a alimenta o e o que é preparado; como s o preparados os alimentos; a rotina alimentar das crian as; onde e como as crian as s o servidas. A alimenta o era pouco variada; láctea, no café da manh e lanches, e no almo o com alimentos como arroz, batata, feij o e, às vezes, carnes. Frutas e hortali as eram escassas, e alimentos industrializados estavam presentes em todos os domicílios. Foi possível apreender o cotidiano das práticas alimentares, suas inadequa es, insuficiência de alimentos, higiene precária dos alimentos complementares, influência das avós, ambiente inadequado às refei es e situa o de vida das famílias. Analizar los hábitos alimentarios de ni os malnutridos menores de dos a os. Estudio exploratorio descriptivo cualitativo, con análisis temático de datos, recolectados por observación participante y entrevistas. Participaron 42 sujetos. Los siguientes temas emergieron de indagaciones acerca de los hábitos alimentarios de los ni os: quién prepara la alimentación y qué se prepara; cómo se preparan los alimentos; cómo es la rutina alimentaria de los ni os; dónde y cómo los ni os son servidos. La alimentación era variada poco, con alimentos lácteos en el desayuno y meriendas; y alimentos como arroz, patatas, frijoles y carne a veces para el almuerzo. Frutas y verduras eran escasas y alimentos procesados estaban presentes en todas las casas. Fue posible saber acerca del cotidiano de las prácticas alimentarias, sus inadecuaciones, insuficiencia de alimentos, higiene precaria de alimentos complementarios, influencia de las abuelas, ambiente inadecuado para comidas y situación de vida de las familias. OBJECTIVE: Analyze food practices of unnourished children under two years old. METHOD: Exploratory, descriptive and qualitative study. Data were collected through participant observation and interviews. Participants were 42 subjects. The data were subjected to thematic analysis. RESULTS: The following themes emerged when addressing the eating habits of those children: Who prepares the food and what is prepared; How foods are prepared; Children's eating routine; Where and how children are served. Food was varied little, with lacteous food at breakfast and snacks, and with food suc
Aplica o de lipases microbianas na obten o de concentrados de ácidos graxos poliinsaturados
Carvalho Patrícia de Oliveira,Campos Paula Renata Bueno,Noffs Maximiliano D'Addio,Oliveira Joaquim Gilberto de
Química Nova , 2003,
Abstract: Several polyunsaturated fatty acids (PUFA) belonging to the mega 6 series, such as cis-6,9,12 gamma-linolenic acid, as well as those of the mega 3 series, such as cis-5,8,11,14,17-eicosapentaenoic acid and cis-4,7,10,13,16,19-docosahexaenoic acid are of considerable interest due to their nutritional and therapeutic properties. Methods used for the concentration of PUFA from natural sources include urea adduct formation, solvent winterization, supercritical fluid extraction and lipase-catalyzed reaction. Lipases are known to have little reactivity on PUFA and these acids can be enriched by selective hydrolysis, direct esterification of glycerol with PUFA and interesterification. Since lipase reactions are advantageous with respect to fatty acid, positional specificities and mild incubation condition, these enzymes are considered to be suitable for the production of PUFA concentrates for medical purposes.
Acute toxicity evaluation of cutting fluids used in manufacturing processes to Poecilia reticulata and Daphnia magna
Alexandre Magno de Paula Dias,Débora Monteiro Brentano,Cátia Regina Silva de Carvalho-Pinto,William Gerson Matias
Biotemas , 2006,
Abstract: Grinding operations are very significant among the manufacturing processes of the metal-mechanic industry. In conventional grinding, cutting fluids are of great concern for improving productivity, but also for being hazardous to the environment. In order to contribute to the knowledge of the actual toxic effects of these products in aquatic environments, the present work assesses the toxicity potential through acute toxicity tests of three different kinds of cutting fluids, with three different usage times. The tests were carried out using the fish Poecilia reticulate and the microcrustacean Daphnia magna as test organisms. These tests made it possible to determine the Median Lethal Concentration (LC50) for the fish and the Median Effective Concentration (EC50) for the microcrustacean. The results indicate that, after storage, the toxicity potential of cutting fluids decreases. However, in the three situations investigated, the product presented a high toxicity potential, which reinforces the need of special care in its handling, usage and disposal.
Preliminary results from D? run II data
Carvalho, Wagner de Paula;
Brazilian Journal of Physics , 2004, DOI: 10.1590/S0103-97332004000200013
Abstract: we present recent physics results from the data collected by the d? detector in this early stage of run ii of the tevatron proton-antiproton collider. emphasis is given to the forward proton detector, a new subsystem that will enable detailed studies of diffractive phenomena at tevatron.
Preliminary results from D run II data
Carvalho Wagner de Paula
Brazilian Journal of Physics , 2004,
Abstract: We present recent physics results from the data collected by the D detector in this early stage of Run II of the Tevatron proton-antiproton collider. Emphasis is given to the Forward Proton Detector, a new subsystem that will enable detailed studies of diffractive phenomena at Tevatron.
Oferta de alimentos processados no entorno de escolas públicas em área urbana
Leite, Fernanda Helena Marrocos;Oliveira, Maria Aparecida de;Cremm, Elena de Carvalho;Abreu, Débora Silva Costa de;Maron, Luana Rieffe;Martins, Paula Andrea;
Jornal de Pediatria , 2012, DOI: 10.2223/JPED.2210
Abstract: objective: to assess the availability of food in relation to their degree of industrial processing and the types of food stores in the perimeters of elementary schools. method: this is a cross-sectional study. 82 food stores located within a 500 m radius buffer of three public schools located in three distinct regions with different socioeconomic levels in the municipality of santos, state of s?o paulo, brazil, were assessed. all streets within a 500-meter radius of the schools were covered, geographic coordinates were recorded and information about the stores and food items available were collected by direct observation and interview with store managers. available food items were classified in relation to their degree of industrial processing as ultra-processed foods and minimally processed foods. kernel's density maps were used to assess the degree of agglomeration of stores near the schools. results: the stores that offered mostly ultra-processed foods were significantly closer to schools than those who offered mostly minimally processed foods. there was a significant difference between the availability of processed food in different types of stores and between the three regions assessed. conclusions: the data found by this work evidences that children who attend the three public schools assessed are exposed to an environment that encourages the consumption of ultra-processed foods through easier access of these products in the studied stores.
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