Optimum Design
Mostrando 25-36 de 289 artigos, teses e dissertações.
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25. SYNTHESIS OF SOLID CATALYST FROM DOLOMITE FOR BIODIESEL PRODUCTION USING PALM KERNEL OIL IN AN OPTIMIZATION PROCESS BY DEFINITIVE SCREENING DESIGN
Abstract A solid catalyst for biodiesel production was synthesized from dolomite by calcination at different temperatures of 800 and 900oC for 2 h. The catalyst was characterized by scanning electron microscopy (SEM) and Brunauer Emmett Teller (BET). Its performance in the production of palm kernel biodiesel (PKB) using palm kernel oil in an optimization stu
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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26. ALKALINE PROTEASE PRODUCTION BY Bacillus licheniformis LBA 46 IN A BENCH REACTOR: EFFECT OF TEMPERATURE AND AGITATION
Abstract The production of protease from Bacillus licheniformis LBA 46 was studied in a 6 L reactor using the experimental design tool. The higher protease production was obtained in the exponential phase of growth reaching maximum activity (~3,000 U/mL) after 48 h of fermentation at 30 ºC and 300 rpm in a culture medium made of agroindustrial by-products.
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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27. Development of a generic method for the determination of proton-pump inhibitors by capillary zoneelectrophoresis
A generic capillary zone electrophoresis method was developed for the analysis of four proton pump inhibitors: omeprazole, pantoprazole, lansoprazole and rabeprazole. During preliminary analysis screening of phosphate buffers at different pH levels was performed, in order to determine the optimum pH domain suitable for the simultaneous determination of all s
Braz. J. Pharm. Sci.. Publicado em: 30/09/2019
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28. Thermal Requirements and Photoperiod Influence in the Leaf Development of Two Forest Species
ABSTRACT The aim of this work was to evaluate the effect of thermal time methods and to identify the phyllochron and photoperiod response in seedlings of two forest species: Corymbia citriodora and Eucalyptus urophylla. A field experiment was installed under a completely randomized design, in a 2 × 11 factorial scheme, with two forest species and eleven sow
Floresta Ambient.. Publicado em: 23/09/2019
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29. Cardinal temperatures and thermal requirements for the initial development of two Brazilian native species
Resumo: O objetivo deste trabalho foi estimar as temperaturas cardinais e quantificar a necessidade térmica para o desenvolvimento inicial de mudas das espécies de árvores nativas Citharexylum myrianthum e Bixa orellana. O experimento foi realizado em campo, em delineamento inteiramente casualizado, em arranjo fatorial 2?12 (2 espécies arbóreas e 12 ép
Pesq. agropec. bras.. Publicado em: 23/09/2019
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30. Weibull distribution and dynamics of germination of Rangpur lime seeds at different temperatures
Resumo: O limão-cravo é o porta-enxerto mais utilizado no Brasil e sua propagação ocorre por meio de sementes. Atualmente nas prescrições das Regras de Análise de Sementes não há metodologia descrita para realização do teste de germinação de limão-cravo. Dessa forma, o objetivo foi estudar a dinâmica da germinação em sementes de limão-cravo
J. Seed Sci.. Publicado em: 09/09/2019
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31. Effects of nickel fertilization on soybean growth in tropical soils
ABSTRACT Although nickel (Ni) is recognized as plant nutrient since the turn of the 21st century, uncertainty remains about its optimum application rates and forms. This paper focuses on Ni application in soils, relating to its effect as a plant micronutrient. Specifically, the effect of Ni on the activity of urease in soybean plants is examined. The effects
Bragantia. Publicado em: 29/07/2019
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32. PRODUCTION OF FATTY ACID METHYL ESTERS FROM AN OLIVE OIL INDUSTRY WASTE
ABSTRACT This work studies the synthesis of fatty acid methyl esters (FAME) using crude olive pomace oil as raw material and zinc stearate as catalyst. Pomace oil is a non-edible by-product of olive oil production. The oil was characterized. In order to reduce the plant pigment content in the oil, the liquid was contacted with a modified clay. An experimenta
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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33. EFFECT OF STEEL PLATE THICKNESSES AND FLUID FLOW CHARACTERISTICS OF AN IMPINGING AIR JET ON HEAT TRANSFER AT THE STAGNATION POINT
ABSTRACT The design and process of heat transfer elements, from its source to heat sink through various media vary according to the product and system concerned. The effect of thickness of a steel plate on heat transfer characteristics with an impinging air jet at the stagnation point was studied. Experiments were carried out with different nozzles, heights,
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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34. APPLICATION OF POLYCARBOXYLIC ACIDS AS BINDERS FOR TiO2 IMMOBILIZATION ON COTTON TEXTILES
ABSTRACT Immobilizing the photocatalyst on a support is an alternative solution to a critical issue in photocatalysis, which is the need for unit operations to remove the photocatalyst from the effluent. In this work, TiO2 was immobilized onto a cotton textile substrate by polycarboxylic acid binders (succinic and citric acids) using a solution deposition me
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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35. Optimizing the Extraction of Anthocyanins from the Skin and Phenolic Compounds from the Seed of Jabuticaba Fruits (Myrciaria jabuticaba (Vell.) O. Berg) with Ternary Mixture Experimental Designs
Total phenolic compounds (TPC) extraction from the seed and total monomeric anthocyanins (TMA) extraction from the skin of “Sabará” jabuticaba were optimized with simplex lattice designs for solvent mixing, and the extraction time was optimized by univariate design. The optimum conditions for the extraction method were ethanol:water (60:40 v/v) solvent
J. Braz. Chem. Soc.. Publicado em: 04/07/2019
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36. Performance and carcass characteristics of broilers fed whole corn germ
ABSTRACT The objective of this study was to evaluate the effect of including whole corn germ (WCG) on the performance; diet metabolizability; yields of carcass, cuts, and offal; and quality of meat of broilers. A total of 648 chicks were assigned to six treatments in a completely randomized design with six replicates, with 18 birds in each. Treatments consis
R. Bras. Zootec.. Publicado em: 10/06/2019