Factorial Designs
Mostrando 13-24 de 63 artigos, teses e dissertações.
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13. Study on fermentation conditions of palm juice vinegar by response surface methodology and development of a kinetic model
Natural vinegar is one of the fermented products which has some potentiality with respect to a nutraceutical standpoint. The present study is an optimization of the fermentation conditions for palm juice vinegar production from palm juice (Borassus flabellifer) wine, this biochemical process being aided by Acetobacter aceti (NCIM 2251). The physical paramete
Braz. J. Chem. Eng.. Publicado em: 2012-09
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14. Process analysis and optimization mapping through design of experiments and its application to a polymerization process
The technique of experimental design is used on an ethylene polymerization process model in order to map the feasible optimal region as preliminary information for process optimization. Through the use of this statistical tool, together with a detailed deterministic model validated with industrial data, it is possible to identify the most relevant variables
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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15. Ideal culture conditions for Dicyma pulvinata conidia mass production.
Abstract ? The objective of this work was to set up ideal conditions for conidia mass production of Dicyma pulvinata. Four isolates were compared in terms of their growth and conidia production on various substrates (grains of parboiled rice, common rice, maize and wheat, besides chipped maize and rice husk), temperatures (19, 22, 25, 28 and 31oC), growth co
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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16. Pre-treatment and enzymatic hydrolysis of sugar cane bagasse / Pré-tratamento e hidrólise enzimática do bagaço de cana-de-açúcar
In this work the production of fermentable sugars from sugar cane bagasse pretreated with diluted sulfuric acid and phosphoric acid and delignified with NaOH was estudied. 23 Factorial designs were performed to evaluate the influence of pretreatment time (h), temperature (°C) and acid concentration (H2SO4 or H3PO4). After pretreatment bagasse was delignifie
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/06/2010
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17. Bayesian analysis of 2k factorial designs using the sparse eects, hierarchy and heredity principles / Análise Bayesiana de ensaios fatoriais 2k usando os princípios dos efeitos esparsos, da hierarquia e da hereditariedade
No Planejamento de experimentos para o ajuste de modelos polinomiais envolvendo k fatores principais e respectivas interações, e bastante comum a utilização dos fatoriais 2k, 3k ou frações dos mesmos. Para as analises dos resultados desses experimentos, freqüentemente se considera o princípio da hereditariedade, ou seja, uma vez constatada uma intera
Publicado em: 2010
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18. Pré-concentração por extração em ponto nuvem para determinação de cádmio em amostras de bebidas por espectrometria de absorção atômica como forno tubular na chama e aerossol térmico / Preconcentration and Determination of Cadmium in Beverage Samples by Cloud Point Extraction and Thermospray Flame Furnace Atomic Absorption Spectrometry detection
In this work, it was evaluated extraction/preconcentration cloud point procedure for cadmium determination in soft drinks samples stored in polyethylene terephthalate (PET) packaging and detection by thermospray flame furnace atomic absorption spectrometry (TS -FF-AAS). For the cloud point preconcentration procedure were used Triton X-114 as surfactant, PAN
Publicado em: 2010
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19. Produção de gás de síntese a partir da glicerina / Syngas production from glycerol
Biodiesel (alkyls esters) is a clean burning fuel derived from renewable lipid feedstock such as vegetable oil or animal fat. Glycerin is a by-product from the biodiesel production which represents nearly 10% of product total mass. As the biodiesel production is increasing there exist incentives to use the glycerin as raw material for other processes. The gl
Publicado em: 2010
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20. PRODUÇÃO DE ÁCIDO LEVULÍNICO POR MEIO DE HIDRÓLISE ÁCIDA DA CASCA DE ARROZ / ACIDS PRODUCTION BY MEANS OF ACID HYDROLYSIS OF RICE HUSK
The beginning of the 21st century has been characterized by a great interest about the use of renewable raw materials for the production of industrial feedstocks and technological products. This trend is followed by the concern about the huge amount of waste generated by the always increasing agricultural production. In this sense, the reuse of the residual
Publicado em: 2010
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21. Application of experimental design in different stages of the oil refining / Aplicação de planejamento de experimentos em diferentes etapas do refino de petroleo
In this work, experimental design technique was applied to different optimization studies, which were carried out in the Paulínia Refinery (Replan). The work covers applications of the technique in laboratorial scale, in computational tool, and the use of the technique in different industrial plants. The laboratory studies consisted in the evaluation of the
Publicado em: 2009
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22. Optimal treatment choice and blocking for the construction of fractional factorial designs / Escolha de tratamentos e blocagem otimizados na construÃÃo de fatoriais fracionÃrios
This work deals with implementing exchange and interchange algorithms. Efficiency based optimality criteria were used to and optimal fractional factorials for response surface designs. Both treatment choice and blocking were considered. Designs found for each situation were compared to alternatives from literature. In all cases A-optimal or D-optimal designs
Publicado em: 2009
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23. Effect of thermoplastic extrusion on technological characteristics of amaranth flour (Amaranthus cruentus L. BRS-Alegria) / Efeito da extrusão nas características tecnológicas da farinha de amaranto (Amaranthus cruentus L BRS-Alegria)
Introduction. Amaranth presents great potential as a functional food due to its cholesterol-lowering effect and its high nutritive value. The use of amaranth can be increased through its use as an instant flour produced by the thermoplastic extrusion process. Amaranth consumption can benefit public health by preventing cardiovascular disease and by improving
Publicado em: 2009
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24. Estudo da degradação fotocatalítica de dimetil dissulfeto: avaliação estatistica do efeito do pH da temperatura e concentração do contaminante orgânico
This work aimed to assess the photocatalytic degradation of a model odor compound (dimethyl disulfide, DMDS), found in liquid and gaseous wastes of plants for processing poultry byproducts. The effect of pH and temperature on adsorption and photocatalytic degradation was evaluated through factorial experimental designs. The results suggest the presence of an
Química Nova. Publicado em: 2009