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Search Results: 1 - 10 of 259465 matches for " Antonio Carlos F. da;Stefanelo "
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Fungos antagonistas a Sclerotinia sclerotiorum em pepineiro cultivado em estufa
Ethur, Luciana Z.;Blume, Elena;Muniz, Marlove;Silva, Antonio Carlos F. da;Stefanelo, Daniela R.;Rocha, Edileusa K. da;
Fitopatologia Brasileira , 2005, DOI: 10.1590/S0100-41582005000200004
Abstract: white mold caused by sclerotinia sclerotiorum may severely damage vegetables grown in greenhouses. to develop a biological control program for this pathogen proper antagonists are needed. this work aimed to select efficient fungi antagonists for controlling s. sclerotiorum on cucumber (cucumis sativus) grown in greenhouses, and to evaluate the effect of the antagonist on the growth of the vegetable. an isolate of s. sclerotiorum obtained from cucumber and 112 fungi isolates belonging to four genera were used: trichoderma, fusarium, penicillium, and aspergillus. for the in vitro experiment, the cellophane method was used and eight trichoderma virens isolates were selected that had inhibited the pathogen growth by 94 to 100%. greenhouse experiments used sterilized and non-sterilized substrate in plastic cups and non-sterilized substrate in plastic bags. the substrate was inoculated with s. sclerotiorum and the eight isolates of t. virens were used as antagonists. all eight isolates controlled damping-off of plants caused by s. sclerotiorum, but the effect on cucumber growth varied according to the isolate and the substrate treatment.
CULTIVAR RELEASE - FAEM Chiarasul: new white oat cultivar with high yield and grainprocessing quality
Antonio Costa de Oliveira,Fernando Irajá Félix de Carvalho,Luciano Carlos da Maia,José Antonio Gonzalez da Silva
Crop Breeding and Applied Biotechnology , 2012,
Abstract: The white oat cultivar FAEM Chiarasul was developed from a cross between UFRGS 17 and UFGS 10/ Coronado2/Cortez3/Pendek/ME 1563. It is characterized by reduced plant height, and high yield, grain quality and grain-processing quality
The influence of contact stress distribution and specific film thickness on the wear of spur gears during pitting tests
Muraro, Marco Antonio;Koda, Fábio;Reisdorfer Jr., Urbano;Silva, Carlos Henrique da;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000200005
Abstract: one of the main gear damage mechanisms is the formation of pitting and spalling on the tooth flank. several factors have significant influence on the damage formation, such as: contact stress level; tooth profile type; relative contact speed; surface finish and lubrication conditions. this work comprehends the global observation of all such parameters and was carried out to explain the phenomena related to this wear mechanism. the wear test equipment uses the power recirculation principle and is commonly known as fzg test rig. the gears were made from aisi 8620 steel and had two types of surface finishing (by shaving or by milling). the wear experiments were performed with two torque stages: 135 n.m (running-in) and 302 n.m (steady-state), and two test temperatures: 60oc (running-in) and 90oc (steady-state). the wear level was determined by using image analysis. in order to calculate the specific film thickness and friction coefficient, the roughness of tooth flank was measured at each test stop. after the experiments were completed, it was possible to confirm that, for both manufacturing processes, the boundary lubrication regime was adopted at the tooth flank and the specific film thickness presents a different behavior when compared to addendum, pitch diameter and deddendum regions. the wear on the gear flanks depended on the lubricant film thickness and it was higher for the milled gears.
Digenean metacercaria (Trematoda, Digenea, Lepocreadiidae) parasitizing "coelenterates" (Cnidaria, Scyphozoa and Ctenophora) from Southeastern Brazil
Morandini, André Carrara;Martorelli, Sergio Roberto;Marques, Antonio Carlos;Silveira, Fábio Lang da;
Brazilian Journal of Oceanography , 2005, DOI: 10.1590/S1679-87592005000100004
Abstract: metacercaria specimens of the genus opechona (trematoda: digenea: lepocreadiidae) are described parasitizing "coelenterates" (scyphomedusae and ctenophores) from southeastern brazil (s?o paulo state). the worms are compared to other opechona species occurring on the brazilian coast, but no association has been made because only adult forms of these species have been described. suppositions as to the possible transference of the parasites are made.
Educa??o em saúde: uma reflex?o histórica de suas práticas
Silva,Cristiane Maria da Costa; Meneghim,Marcelo de Castro; Pereira,Antonio Carlos; Mialhe,Fábio Luiz;
Ciência & Saúde Coletiva , 2010, DOI: 10.1590/S1413-81232010000500028
Abstract: this text aims to contextualize the transformations occurred in the practice of health education since the political scenario in the end of 19th century, when the first extended initiatives of the brazilian state in the health field were organized, until the creation of the brazilian unified health system.
Biomass and nutrient cycling in pure and mixed stands of native tree species in southeastern Bahia, Brazil
Gama-Rodrigues, Antonio Carlos da;Barros, Nairam Félix de;Comerford, Nicholas Brian;
Revista Brasileira de Ciência do Solo , 2007, DOI: 10.1590/S0100-06832007000200011
Abstract: the objective of this paper is to study selected components of the nutrient cycle of pure and mixed stands of native forest species of atlantic forest in southeastern brazil. tree diameter, height, above-ground biomass, and nutrient content were determined in 22-year-old stands. litterfall, litter decomposition, and nutrient concentration were evaluated from august 1994 to july 1995. the following species were studied: peltogyne angustiflora, centrolobium robustum, arapatiella psilophylla, sclerolobium chrysophyllum, cordia trichotoma, macrolobium latifolium. the litter of a natural forest and a 40-year-old naturally regenerated second-growth forest was sampled as well. the mixed-species outmatched pure stands in height, stem volume and total biomass (29.4 % more). the greatest amount of forest litter was observed in the natural forest (9.3 mg ha-1), followed by the mixed-species stand (7.6 mg ha-1) and secondary forest (7.3 mg ha-1), and least litterfall was measured in the pure c. robustum stand (5.5 mg ha-1). litterfall seasonality varied among species in pure stands (cv from 44.7 to 91.4 %), unlike litterfall in the mixed-tree stand, where the variation was lower (cv 31.2 %). in the natural and second-growth forest, litterfall varied by 57.8 and 34.0 %, respectively. the annual rate of nutrient return via litterfall varied widely among forest ecosystems. differences were detected between forest ecosystems in both the litter accumulation and quantity of litterlayer nutrients. the highest mean nutrient accumulation in above-ground biomass was observed in mixed-species stands. the total nutrient accumulation (n + p + k+ ca + mg) ranged from 0.97 to 1.93 kg tree-1 in pure stands, and from 1.21 to 2.63 kg tree-1 in mixed-species stands. soil fertility under mixed-species stands (0-10 cm) was intermediate between the primary forest and pure-stand systems. the litterfall rate of native forest species in a mixed-species system is more constant, resulting in a more conti
Nutritional assessment and weight-height development of sickle cell children in Northeast Brazil
Maria de Fátima Rebou?as Antunes,Jose Brand?o Neto,Carlos Antonio Bruno da Silva
Revista Brasileira em Promo??o da Saúde , 2009,
Abstract: Objective: To evaluate the weight-height development and the nutritional status of a sickle cell anemia infantile sample in relation to zinc seric levels and to bone age in comparison to a control group of eutrophic children of the same Brazilian region. Methods: There were studied 66 sickle cell children (GE) and 50 eutrophic ones (GC). The nutritional status was assessed using Rohrer Index, Z-score analysis of weight/age, height/age and body mass index (BMI). Zinc seric level (SZn), growth velocity (VC) and bone age (IO) were assessed using the standards of the National Center for Health Statistic (NCHS) data and the results obtained from the GC evaluation. Results: Both groups had similar Rohrer Index. GE presented weight/age and height/age Z scores and BMI of underdevelopment levels with significant statistical difference. VC and IO were also lower in GE. The mean SZn in GE was significantly lower than in GC. Conclusion: The studied sickle cell children were born with normal stature, after that an important decrease in weight-height development occurred, which may be related to under-nourishing status, bone age delay, smaller growth velocity and worse zinc seric levels.
Balan?o de carbono e nutrientes em plantio puro e misto de espécies florestais nativas no sudeste da Bahia
Gama-Rodrigues, Antonio Carlos da;Gama-Rodrigues, Emanuela Forestieri da;Barros, Nairam Félix de;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000300025
Abstract: this study aimed to evaluate the differences in carbon and nutrient cycling and balance in two plantation systems of forest species native in the atlantic forest. the plantation systems consisted of 22 year-old mixed stand and pure stands of six hardwood species (peltogyne angustiflora, centrolobium robustum, arapatiella psilophylla, sclerolobium chrysophyllum, cordia trichotoma, macrolobium latifolium) native to the southeastern region of bahia, brazil, that were evaluated from august 1994 through july 1995. as references, the study included a natural forest and a 40-year-old, naturally regenerating secondary forest. total stocks of carbon and nutrients in the soil-plant-litter systems varied among species in pure stands, but the capacity of accumulation of these elements in the mixed stands was greater than in the pure stands. the intensity of biochemical cycling of all studied nutrients in mixed stands was greater than the average values observed for pure stands. a similar result was obtained for biogeochemical cycling, with exception of ca. the c, p, k balances were negative for all forest species, whereas the n balance was positive. the ca balance was only positive in the pure stand of sclerolobium chrysophyllum, and the mg balance was negative only in the pure stands of centrolobium robustum and macrolobium latifolium. the most negative balances were found for p, k and ca. the mean carbon and nutrient balances in the mixed-tree stands were similar to those in pure stands. the biochemical and biogeochemical cycling in mixed-tree stands was more efficient and the balance more equilibrated than in pure stands. therefore, mixed-tree stands proved to be the best plantation system, in view of the more efficient biochemical and biogeochemical cycling and better balanced of carbon and nutrients.
Metered-dose inhaler for asthma patients: knowledge and effects of a theoretical and practical guidance for pediatricians
Fábio Pereira Much?o,Luiz Vicente Ribeiro Ferreira da Silva Filho,Antonio Carlos Pastorino,Joaquim Carlos Rodrigues
Einstein (S?o Paulo) , 2011,
Abstract: Objective: To evaluate the effect of a theoretical and practicalguidance on knowledge of pediatricians regarding the use ofmetered dose inhalers with spacers. To identify major deficiencies,correct them and train these physicians on the correct use of thedevices. Methods: Pediatricians who participated in a theoreticalpractical program focusing on the use of inhaler devices answered a questionnaire with five questions about the use of these devices before and after the program. A comparison of the scores obtained in the pre- and post-training tests was performed by Wilcoxon test for related samples, and a significance level of 0.05 was adopted. Results: Twenty pediatricians performed pre- and post-training tests. The performance of pediatricians in the post-training test was significantly better than baseline (p<0.001). Conclusion: A brief orientation program for pediatricians significantly improved their knowledge on the use of metered-dose inhalers with spacers, which may translate into an improvement in quality and quantity of prescriptions of these devices in clinical practice. The questions with higher rates of errors in the pre-training test were the questions about the waiting time between two sprays in successive applications and about the correct way to attach the inhaler to the spacer, both with high levels of success in the post-training test.
Caracteriza??o da fauna edáfica em diferentes coberturas vegetais na regi?o norte Fluminense
Mo?o, Maria Kellen da S.;Gama-Rodrigues, Emanuela Forestieri da;Gama-Rodrigues, Antonio Carlos da;Correia, Maria Elizabeth F.;
Revista Brasileira de Ciência do Solo , 2005, DOI: 10.1590/S0100-06832005000400008
Abstract: the soil-litter system is a natural habitat for a great variety of organisms that differ in size and metabolism and are responsible for numerous functions. the study of groups of organism in the soil-litter system allows not only to make inferences on the functionality of these organisms, but also is a simple indication of the ecological complexity in these communities. our study aimed at characterizing the distribution of groups of organism in soil and litter compartments in two seasons of the year (wet summer and dry winter) under five different vegetation covers (eucalyptus, non-preserved forest, preserved forest, regenerating forest ('capoeira'), and pasture) in the northern fluminense region (rj, brazil). both soil and litter under the natural forest covers, in particular the preserved and non- preserved forest, generally showed higher organism density and abundance values than eucalyptus and pasture for in both collecting seasons. in general, there was no preference of organism groups for soil or litter. the organisms density and abundance, shannon's index and pielou's index also varied according to the season of the year and the differences among vegetation covers were more distinct in the summer than in the winter season. the pielou's index was the most stable variable and, therefore, the most appropriate to study the dissimilarities among the vegetation covers in terms of distribution of groups of organisms.
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