Salvador C.A.,Federal Rural University of Rio de Janeiro |
Ferrarezi R.S.,University of Campinas |
Barreto C.V.G.,National Institute of Industrial Property |
Testezlaf R.,University of Campinas
Engenharia Agricola | Year: 2016
Brazil produces grafted citrus seedlings in closed screen houses to reduce pest and disease incidence. Irrigation is usually performed by hand using either breaker nozzles or drilled polyvinyl chloride (PVC) pipe wands on garden hoses. Rootstocks are produced in cone-shaped containers filled with soilless potting mix. Since the containers have a small upper diameter, nutrient solution capture is reduced with the potential to cause environmental contamination from inefficient fertigation. This study provides a method to assess the efficiency of manual overhead irrigation systems used in liner production. The method consists of determining both the volume of water applied and volume lost (i.e., directly and by percolation) in order to obtain an estimate of the percentage of water loss, irrigation efficiency, and the drainage fraction. The method was tested in a commercial facility under standard production practices. The method's attributes included simplicity, quick sampling and data collection, and accuracy. The evaluated nursery was found to have low irrigation efficiency (27.14%) and excessive nutrient solution losses (72.86%). Considering an average production of 300,000 liners per year on 20,000 m2, we determined an annual solution loss of 221.8 m3 with an average environmental release of 158.9 kg of fertilizer. Therefore, more efficient irrigation systems are necessary for sustainable citrus rootstock liners production.
Seelig B.H.T.,National Institute of Industrial Property |
De Souza L.J.,Federal University of Maranhão |
Prada R.B.,Pontifical Catholic University of Rio de Janeiro
International Transactions on Electrical Energy Systems | Year: 2015
This paper presents a method to determine whether an operative voltage control action will have the steady-state expected effect or not. Sensitivity indexes are designed to correlate the controlled voltage with the controlling physical variable in generators, synchronous and static compensators, LTCs and shunt capacitors/reactors. An illustrative numerical example is provided as well as a real life one. The heavily loaded Brazilian system was operating without any problem. However, a small increase in generation caused voltage control devices to work unexpectedly. A harmful interaction among nearby control devices was also noticed. © 2015 John Wiley & Sons, Ltd.
Ferreira D.D.,Federal University of Lavras |
Nagata E.A.,Federal University of Lavras |
Ferreira S.C.,Federal University of Itajubá |
De Seixas J.M.,Federal University of Rio de Janeiro |
And 4 more authors.
Electric Power Systems Research | Year: 2014
This paper presents a new application of independent component analysis for harmonic component extraction from power system signals (voltage and current). The harmonics to be extracted can be time varying and the method does not require synchronous sampling, which means it is able to work in off-nominal frequency. The proposed method has shown to be simple in the operational stage. The method was tested using both simulated and real signals, and performance was evaluated using measures in both frequency and time domains. Results were compared with another method available in the literature. © 2014 Elsevier B.V.
Luna A.J.,National Institute of Industrial Property |
Chiavone-Filho O.,Federal University of Rio Grande do Norte |
Machulek A.,Federal University of Mato Grosso do Sul |
de Moraes J.E.F.,Federal University of São Paulo |
Nascimento C.A.O.,University of Sao Paulo
Journal of Environmental Management | Year: 2012
A highly concentrated aqueous saline-containing solution of phenol, 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP) was treated by the photo-Fenton process in a system composed of an annular reactor with a quartz immersion well and a medium-pressure mercury lamp (450 W). The study was conducted under special conditions to minimize the costs of acidification and neutralization, which are usual steps in this type of process. Photochemical reactions were carried out to investigate the influence of some process variables such as the initial concentration of Fe2+ ([Fe2+]0) from 1.0 up to 2.5 mM, the rate in mmol of H2O2 fed into the system (FH2O2,in) from 3.67 up to 7.33 mmol of H2O2/min during 120 min of reaction time, and the initial pH (pH0) from 3.0 up to 9.0 in the presence and absence of NaCl (60.0 g/L). Although the optimum pH for the photo-Fenton process is about 3.0, this particular system performed well in experimental conditions starting at alkaline and neutral pH. The results obtained here are promising for industrial applications, particularly in view of the high concentration of chloride, a known hydroxyl radical scavenger and the main oxidant present in photo-Fenton processes. © 2012 Elsevier Ltd.
Cordeiro S.Z.,Federal University of Rio de Janeiro |
Simas N.K.,Federal University of Rio de Janeiro |
Henriques A.B.,Federal University of Rio de Janeiro |
Lage C.L.S.,National Institute of Industrial Property |
Sato A.,State University of Rio de Janeiro
In Vitro Cellular and Developmental Biology - Plant | Year: 2012
A protocol was developed for micropropagation of Mandevilla moricandiana (A. DC.) Woodson, a native plant from Brazil. Shoots, obtained from in vitro plantlets were used as source of nodal segments for shoot production from axillary buds. The nodal segments were grown on Murashige and Skoog medium supplemented with different concentrations of 6-benzyladenine and/or indole-3-acetic acid to induce axillary bud elongation. After a 2-mo culture period, the medium supplemented with 1. 0 mg L-1 6-benzyladenine gave the largest number of nodal segments per explant. The nodal segments obtained from plants developed under these conditions were grown on medium supplemented with different concentrations indole-3-acetic acid, α-naphthaleneacetic acid, and indole-3-butyric acid. The use of the medium supplemented with indole-3-acetic acid and indole-3-buryric induced shoot elongation and shoot development, formation of basal callus, and/or indirect organogenesis of roots. Following transfer of shoots to soil, the plants with only basal callus showed 10% survival and developed roots from callus, while in vitro-rooted plants had a maximum 40% survival rate ex vitro. Regardless of the auxin added to the rooting medium, the acclimatization period allowed the plants rooted in vitro to develop their shoots fully. The protocol developed here is suitable for the production of shoots and rooted plantlets of M. moricandiana. © 2012 The Society for In Vitro Biology.
Luna A.J.,National Institute of Industrial Property |
Nascimento C.A.O.,University of Sao Paulo |
Foletto E.L.,Federal University of Santa Maria |
Moraes J.E.F.,Federal University of São Paulo |
Chiavone-Filho O.,Federal University of Rio Grande do Norte
Environmental Technology (United Kingdom) | Year: 2014
In this work, a saline aqueous solution of phenol, 2,4- dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP) was treated by the photo-Fenton process in a falling-film solar reactor. The influence of the parameters such as initial pH (5-7), initial concentration of Fe 2+ (1-2.5 mM) and rate of H2O2 addition (1.87-3.74 mmol min-1) was investigated. The efficiency of photodegradation was determined from the removal of dissolved organic carbon (DOC), described by the species degradation of phenol, 2,4-D and 2,4-DCP. Response surface methodology was employed to assess the effects of the variables investigated, i.e. [Fe2+], [H2O2] and pH, in the photo-Fenton process with solar irradiation. The results reveal that the variables initial concentration of Fe2+ and H2O 2 presents predominant effect on pollutants degradation in terms of DOC removal, while pH showed no influence. Under the most adequate experimental conditions, about 85% DOC removal was obtained in 180 min by using a reaction system employed here, and total removal of phenol, 2,4- and 2,4-DCP mixture in about 30 min. © 2013 Taylor & Francis.
Miguel M.A.,National Institute of Industrial Property |
Pagliari C.L.,Brazilian Military Institute of Engineering |
Da Silva E.A.B.,Federal University of Rio de Janeiro |
Perez M.M.,Brazilian Military Institute of Engineering
Proceedings - International Conference on Image Processing, ICIP | Year: 2015
Stereoscopic video systems aim to confer a true three-dimensional (3D) view of the real world. However, in the process of 3D image acquisition and display, eventual distortions may affect the 3D perceptual quality, leading to visual discomfort. As visual comfort is a key issue when dealing with 3D acceptance, subjective tests (that are time consuming and cannot provide quality scores on the fly) have been conducted in order to establish 3D assessment factors. In this work, we use the ground truth of a publicly available database in order to develop a method to automatically assess the visual comfort of stereoscopic imagery. The assessment has the objective of assisting in the adjustment of stereo camera baselines. The method employs stereo vision geometry and stereo matching algorithms to estimate depth planes, for each video frame, in order to associate their locations with different visual comfort zones. The proposed method shows a high level of correlation with subjective tests, comparing favorably with another proposal from the literature. © 2015 IEEE.
Da Affonso R.S.,Anhanguera |
Guimaraes A.P.,Brazilian Military Institute of Engineering |
Oliveira A.A.,University of Sao Paulo |
Slana G.B.C.,National Institute of Industrial Property |
Franca T.C.C.,Brazilian Military Institute of Engineering
Journal of the Brazilian Chemical Society | Year: 2013
Mosquitoes are responsible for conveying various diseases caused by viruses, parasites and helminthes. Considering the cost and complexity of the treatment of these diseases, the use of repellents for protection from the mosquito vectors becomes an interesting alternative. In the present work, docking and molecular dynamics (MD) studies were performed on potential ligands to the odorant binding protein of the mosquito Anopheles gambiae (AgOBP 1), the main vector of malaria. The binding modes on AgOBP 1 of molecules with known attractive activities and the main components of the oil of indian clove (Syzygium aromaticum) with potential repellent activities were compared to the known repellent N,N-diethyl-3- methylbenzamide (DEET). Results suggest the eugenyl acetate as a better repellent than DEET and also reveal the main features of the binding site of AgOBP1 important to the design of new and more efficient repellents. © 2013 Sociedade Brasileira de Química.
PubMed | National Institute of Industrial Property
Type: Journal Article | Journal: Recent patents on anti-cancer drug discovery | Year: 2016
Biotechnology, which promoted revolutions in many fields, generates great expectations for the future, mainly in the pharmaceutical sector for the treatment of several diseases. Cancer is a leading cause of death worldwide and due to its complexity and singularity, there are a number of challenges that limit the development of new drugs for antitumor therapies, making the research for cancer treatment one of the most exploited in the medical field.The main objective of this article is to identify trends of biotechnological advances that may have application in improving cancer therapies.Information from patent applications of biotechnological drugs in the last five years was retrieved using Thomson Reuters Integrity database.Cancer is the leading therapeutic condition found in patent documents. The subject matter most cited in patent applications includes monoclonal antibodies, adoptive cell therapy, RNA interference and new vaccine peptides.The analysis of the documents has provided an overview of new biological alternatives for use in cancer treatment, showing potential avenues for years to come.
PubMed | National Institute of Industrial Property
Type: | Journal: Journal of environmental management | Year: 2012
A highly concentrated aqueous saline-containing solution of phenol, 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP) was treated by the photo-Fenton process in a system composed of an annular reactor with a quartz immersion well and a medium-pressure mercury lamp (450 W). The study was conducted under special conditions to minimize the costs of acidification and neutralization, which are usual steps in this type of process. Photochemical reactions were carried out to investigate the influence of some process variables such as the initial concentration of Fe(2+) ([Fe(2+)](0)) from 1.0 up to 2.5 mM, the rate in mmol of H(2)O(2) fed into the system (FH(2)O(2);in) from 3.67 up to 7.33 mmol of H(2)O(2)/min during 120 min of reaction time, and the initial pH (pH(0)) from 3.0 up to 9.0 in the presence and absence of NaCl (60.0 g/L). Although the optimum pH for the photo-Fenton process is about 3.0, this particular system performed well in experimental conditions starting at alkaline and neutral pH. The results obtained here are promising for industrial applications, particularly in view of the high concentration of chloride, a known hydroxyl radical scavenger and the main oxidant present in photo-Fenton processes.