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Search Results: 1 - 10 of 51353 matches for " Higor da Cal;Amado "
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Determina??o de glicerol livre e total em amostras de biodiesel por método enzimático com detec??o colorimétrica
Valdez, Higor da Cal;Amado, Roberto Salgado;Souza, Flávia Carvalho de;D'Elia, Eliane;Vieira, Eduardo de Castro;
Química Nova , 2012, DOI: 10.1590/S0100-40422012000300028
Abstract: a method based on enzymatic activities was developed using three enzymes (glycerokinase, glycerol-3-phosphate oxidase and peroxidase) and colorimetric detection for the determination of glycerol in biodiesel. the enzymatic conversion of glycerol produces h2o2 that is eliminated by the action of peroxidase, an oxygen acceptor and 4- aminoantipirine, producing water and a colored compound, which was analyzed. this method showed good linear correlation coefficient (r = 0.9937) in the concentration range of 4.95 x 10-5 to 3.96 x 10-4% (w/w) and had experimental limits of detection and quantitation of 7.10 x 10-6 and 2.10 x 10-5% (w/w), respectively.
Uso de simuladores comerciais na análise comparativa de desempenho de controladores para um trocador de calor a placas
Guilherme Nardin Prado,Higor Conti de Almeida,Flávio Vasconcelos da Silva,Ana Maria Frattini Fileti
Exacta , 2011,
Abstract: Conventional feedback control and cascade control strategies were applied to a heat exchanger in order to compare the control performance in terms of deviations of temperature and settling time, under different plant disturbances. The plate type heat exchanger was designed by using the software ASPEN HTFS . With the help of ASPEN PLUS , the steady state was found and the simulation exported to the ASPEN DYNAMICS . The process reaction curve method was then carried out. The parameters of first-order-plus-time-delay (FOPTD) transfer functions were determined for the process and also for the load disturbances. In the Simulink/MATLAB environment, feedback control diagrams were built employing these transfer functions to find the closed loop responses. The same methodology of use of commercial simulators can be applied to different unit operations of the chemical industry, as well as for plant-wide problems. It must be pointed out that, since they have friendly interface, access to thermodynamic data and robustness in the available numerical methods for simulation, an easy use and a steep learning curve were noted for all the commercial simulators employed in the present work.
Identidade social e dores da alma entre pescadores artesanais em Itaipu, RJ
Barbosa, S?nia Regina da Cal Seixas;
Ambiente & Sociedade , 2004, DOI: 10.1590/S1414-753X2004000100007
Abstract: this article proposes a reflection on social identity and subjectivity based on research carried out among artisanal fishers from colony z-7, in itaipu, niterói, in the state of rio de janeiro, taking into consideration the significant number of individuals residing in this community who have been diagnosed by the public health service as suffering from depression, panic attacks and other psychic disorders. in this article, the states of depression, anxiety and other psychic disturbances will be considered as expressions of subjectivity and denominated heartaches. the different approaches regarding these subjects, found in medical literature, are recognized and this aspect will be mentioned throughout the article. however, the central objective is to understand the heartaches as an important category that can aid in the comprehension of reality and the complexity of contemporary life and its social and environmental transformations.
Subjetividade e complexidade social: contribui??es ao estudo da depress?o
Barbosa, S?nia Regina da Cal Seixas;
Physis: Revista de Saúde Coletiva , 2006, DOI: 10.1590/S0103-73312006000200010
Abstract: this paper presents a reflection based on some results of the research project quality of life in complex societies: the depression between workers of petrochemical industry and artisan fishermen. is must be pointed out that this research is a large part of a deep theory developed since the 90's. in a deep field research, the quality of life through analysis of depressive states in workers of the petrochemical industry (replan, paulínia, sp) and artisan fishermen (7 colony z - itaipu and piratininga, niterói, rio de janeiro) was examined, considering that these workers are under intense social-environmental transformations in their daily routine and revealing depression as expression of subjectivity, in the individual, of an intense social complexity.
Influência da energia de soldagem na microestrutura e na microdureza de revestimentos de a?o inoxidável duplex
Nunes, Everton Barbosa;Batista, Higor Jonas;Barreto, Alexandre Sousa;Marques, Jéssyca da Silva;Motta, Marcelo Ferreira;
Soldagem & Inspe??o , 2012, DOI: 10.1590/S0104-92242012000200005
Abstract: duplex stainless steels (dss) are characterized by the presentation of an interesting combination of good mechanical properties and corrosion resistance, having a wide application in chemical and petrochemical industry. generally, the manufacture and repair of any industrial equipment involve welding operations, even though it is very important to evaluate the influence of welding parameters. it is very important to obtain appropriate ferrite content in the weld metal, so that the variation of heat input can influence on the ferrite content directly. therefore, the aim this work is to evaluate the influence of the heat input on the microstructure and the microhardness of the weld metal of the dss. the weld overlay were performed with deposition of two layers on the structural steel astm a516 gr.60, using as filler metal the aws e2209-17 coated electrode. three energy levels (15, 20 and 24 kj/ cm) were used, varying the welding current and speed. it was verified that for energy levels used didn't have significant difference on the ferrite content, but the first bead deposited had a higher austenite content in relation to other beads. all conditions got microhardness below the critical value.
Intelectuais e cientistas na América Latina: A importancia dos temas Subjetividade, Qualidade de vida e Risco
da Costa Ferreira,Leila; da Cal Seixas,S?nia Regina;
Polis (Santiago) , 2010, DOI: 10.4067/S0718-65682010000300015
Abstract: the article offers two contributions to the interesting debate about the quality of life, subjectivity and risk, in the area of environment and society. on the one hand it allows as to widden the knowledge of the importance of the subjects. and on the other it contributes to a systematic way of working with latin american data.
Intelectuais e cientistas na América Latina: A importancia dos temas Subjetividade, Qualidade de vida e Risco
Leila da Costa Ferreira,S?nia Regina da Cal Seixas
Polis : Revista de la Universidad Bolivariana , 2010,
Abstract: El artículo propone dos contribuciones al interesante debate sobre la calidad de vida, la subjetividad y el riesgo en el área de Medio Ambiente y Sociedad. Por un lado permite ampliar el conocimiento de la importancia que tienen los sujetos. Y por el otro contribuye a una forma sistemática de trabajar con datos sobre América Latina.
Multispectral Image Processing System Developed in CARTOMORPH Software—NDVI Module  [PDF]
Tiago Oyan Aguiar, Samara Cal?ado de Azevedo, Miriam Maria Pedrosa, Guilherme Pina Cardim, Erivaldo Antonio da Silva
Advances in Remote Sensing (ARS) , 2018, DOI: 10.4236/ars.2018.72007
Abstract: In this paper, we have evaluated the multispectral module implemented in the CARTOMORPH software, which is a public domain software under development by the mathematical morphology research group at FCT/UNESP. The aim of CARTOMORPH is to provide an open software with feature extraction methods and a library that contains a variety of implemented code (functions) that can be easily operated by users through graphical interface. The multispectral image processing system has been developed to allow feature discrimination by operations between bands from Remote Sensing images. The normalized difference vegetation index (NDVI) was selected to be implemented on CARTOMORPH because of its acknowledged performance for monitoring of vegetation and cartographic applications. The experiments were applied to multispectral bands from Quick Bird image and the results were compared with those provided by the SPRING and ENVI software. Former is a Brazilian free software, developed by National Institute for Space Research-INPE and dedicated to image processing and Geographic Information Systems (GIS) analysis, as well as ENVI, which is a traditional remote sensing image analysis system. The results prove that the implementation of this module is correct, allowing potential usage in the field of cartography and for environmental applications.
Escola Politécnica: possivelmente o primeiro curso formal de contabilidade do estado de S?o Paulo
Martins, Eliseu;Silva, Amado Francisco da;Ricardino, álvaro;
Revista Contabilidade & Finan?as , 2006, DOI: 10.1590/S1519-70772006000300010
Abstract: this study demonstrates that, as opposed to what is commonly told, the first accounting teaching institution in s?o paulo state was the polytechnic school, which was founded in 1894 and offered, as part of its preliminary course, equivalent to the first year of the engineering course, mercantile bookkeeping classes, granting to students who graduated in the subjects of this first module the degree of accountant. on 12/08/1900, federal decree no 727 officially recognized the degrees issued by the institutions since the time of its foundation, independently from whether the profession was exercised. the álvares penteado school of commerce foundation, which was founded in 1902, was the second institution oriented towards accounting teaching in that state. in view of an eight-year gap between the founding of the two institutions, it is beyond doubt that the polytechnic school is the first accounting teaching institution in s?o paulo state. nevertheless, one name is important at both institutions: horácio berlinck.
Liquidez internacional e ciclo reflexo: algumas observa??es para a América Latina
Resende, Marco Flávio da Cunha;Amado, Adriana Moreira;
Revista de Economia Política , 2007, DOI: 10.1590/S0101-31572007000100003
Abstract: international liquidity and reflex cycle: some observations to latin america. the international financial instability of the 1990 has been analysed in several occasions on minskyan perspectives. the paper is based on this theoretical approach and intends to demonstrate that the financial fragility hypothesis is very useful to the analysis of the cycle in peripheral economies, which real performance is associated to the availability of international liquidity. the analysis is based on three latin american countries: brazil, argentina and mexico.
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