Optimal Speed
Mostrando 1-12 de 88 artigos, teses e dissertações.
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1. Designing and fabrication of a low-cost dip-coater for rapid production of uniform thin films
In this work, a self-made dip-coater equipment was developed for the fabrication of thin films. The assembly of the apparatus was carried out using simple mechanical and electronic pieces, recycle parts, and spending an inexpensive budget suitably. The production, software design, and features of the device were focused on the sol-gel dip-coating method, whi
Química Nova. Publicado em: 2022
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2. Analysis of Al2O3-ZrO2 ceramic insert in turning process of Ti-6Al-4V alloy using grey Taguchi-based response surface methodology (GT-RSM)
Abstract The present investigation aimed at a sustainable green turning operation of Ti-6Al-4V alloy using multi-objective optimization of surface roughness, tool flank wear, material removal rate, and tool wear loss with cutting speed, feed rate, and depth of cut as input parameters. The experiments were performed on a CNC lathe machine using an alumina-zir
Cerâmica. Publicado em: 2022
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3. Thermal Dissipation Effect on Temperature-controlled Friction Stir Welding
Resumo Durante a Soldagem por Fricção linear (FSW) de geometrias complexas, a dissipação térmica, induzida por características geométricas ou pelo ambiente circundante, desempenha um papel importante na qualidade final da junta. Para garantir uma qualidade consistente em condições diferentes é necessário a adaptacão de parâmetros durante o proce
Soldag. insp.. Publicado em: 25/11/2019
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4. Synthesis and characterization of microalgae fatty acids or Aloe vera oil microcapsules
Abstract It’s proposed a single methodology for the encapsulation of Aloe vera oil or microalgae fatty acids using the complex coacervation process between gelatin and gum arabic. Although a very recurrent method, it is not trivial to establish a single coacervation methodology to encapsulate different compounds. The optimal synthesis conditions, that resu
Polímeros. Publicado em: 04/11/2019
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5. EXPERIMENT OF A SWING SEPARATING SIEVE ON A POTATO DIGGER
ABSTRACT For the purpose of achieving the distribution of the potato-soil mixture and the appropriate parameters of the swing separating sieve, we conducted experiments using the 4SW-170 potato digger. The experiments consisted of two parts. In each part, the experimental factors were crank rotational speed, sieve inclination and machine forward speed. The d
Eng. Agríc.. Publicado em: 12/08/2019
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6. Aceite residual automotriz como aditivo en mezclas de hormigón: Si es factible su uso
ABSTRACT Finding a use for Automotive Residual Oil (ARO) is preponderant for society, since one liter of this liquid is capable of contaminating one million liters of drinking water, without counting the damages to agricultural soils and groundwater. The purpose of this work is to study the physical and mechanical properties of concrete by incorporating ARA
Matéria (Rio J.). Publicado em: 10/06/2019
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7. Extracción optimizada y purificación parcial de invertasa aislada de S. Cerevisiae en puré de durazno
Abstract The extraction was performed using an autolysis process where enzymes degrade cell structures and release the cytoplasmic contents to the extracellular medium. The autolysis process was carried out in shake flasks with different agitation speeds (50 - 350 rpm) and the concentration of sodium bicarbonate (50 -350 mM NaHCO3) at 40 ° C for 24 hours, u
Rev. Bras. Frutic.. Publicado em: 22/03/2018
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8. Dynamic maceration of Matricaria chamomilla inflorescences: optimal conditions for flavonoids and antioxidant activity
ABSTRACT The aim of this paper was to study and optimize the dynamic maceration process to obtain Matricaria chamomilla L., Asteraceae, inflorescences extracts with optimum flavonoid content and antioxidant activity using a multivariate approach. Hydroalcoholic extracts were obtained by dynamic maceration in lab scale and the influence of extraction temperat
Rev. bras. farmacogn.. Publicado em: 2018-01
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9. Turbo-extraction of glycosides from Stevia rebaudiana using a fractional factorial design
ABSTRACT Stevia rebaudiana (Bertoni) Bertoni, Asteraceae, leaf extract has recently called the attention of food industry as a proposal for natural sweetener. The sweet flavor is attributed to the glycosides, in especial stevioside and rebaudioside A, which are the plant main chemical markers. The aim of the work reported here was to optimize the turbo-extra
Rev. bras. farmacogn.. Publicado em: 2017-08
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10. DECHLORINATION OF ZINC OXIDE DUST DERIVED FROM ZINC LEACHING RESIDUE BY MICROWAVE ROASTING IN A ROTARY KILN
Abstract The dechlorination efficiency of zinc oxide dust using microwave roasting was investigated capitalizing on the different microwave absorbing capacities of the compounds such as chlorine, lead, and zinc oxide. The associated dechlorination reactions were discussed in detail and the effect of all the influencing parameters such as the air flow rate, s
Braz. J. Chem. Eng.. Publicado em: 2017-01
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11. Static Limit Analysis of Reinforced Soil Structures by a Simple Finite Element and Second-Order Cone Programming
Abstract To discretize reinforced soil structures in plane strain and predict their collapse load, a simple three-node triangular finite element is formulated based on the static theorem of the limit analysis. The element satisfies the equilibrium equations and the mechanical boundary conditions in a weak sense. A modified Mohr-Coulomb yield surface is adopt
Lat. Am. j. solids struct.. Publicado em: 2017
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12. Predicting death from kala-azar: construction, development, and validation of a score set and accompanying software
Abstract INTRODUCTION Early identification of patients at higher risk of progressing to severe disease and death is crucial for implementing therapeutic and preventive measures; this could reduce the morbidity and mortality from kala-azar. We describe a score set composed of four scales in addition to software for quick assessment of the probability of dea
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-12