Composite System
Mostrando 13-24 de 440 artigos, teses e dissertações.
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13. MATHEMATICAL MODELLING AND IMMEDIATE AND LATENT QUALITY OF NATURAL IMMATURE COFFEE UNDER DIFFERENT DRYING CONDITIONS
ABSTRACT This work aimed to study the immediate and latent effects of different relative humidities on the quality of dried coffee fruits, describe the drying kinetics of natural immature coffee (Coffea arabica L.), and evaluate the mathematical model that best fits the experimental drying data. The drying was carried out in a fixed layer dryer coupled to a
Eng. Agríc.. Publicado em: 04/11/2019
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14. Development of an Analytical Method for the Determination of Metals in Chicken Breast by Microwave Induced Plasma Optical Emission Spectrometry (MIP-OES)
An analytical method for the determination of Al, Ca, Cd, Cr, Cu, Fe, Hg, K, Mg, Na and Zn in breast of conventional, country and Christmas chicken and turkey samples using microwave induced plasma optical emission spectrometry (MIP-OES) technique was developed. Samples were decomposed in a digester block with a reflux system under conditions optimized using
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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15. Evaluation of the Projectile's loss of Energy in Polyester Composite Reinforced with Fique Fiber and Fabric
Firearms threat has always been a matter of personal concern, especially to soldiers in armed conflicts as well as police officers and civilians involved with public security. A multilayered armor system (MAS) is intended to personal protection against high kinetic energy ammunition, such as that used in rifles. MAS layers are normally composed of a front ce
Mat. Res.. Publicado em: 21/10/2019
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16. APPLICATION OF RESPONSE SURFACE METHODOLOGY FOR LIPASE CATALYZED SYNTHESIS OF 2-ETHYLHEXYL PALMITATE IN A SOLVENT FREE SYSTEM USING ULTRASOUND
Abstract This study aims at clean production of 2-ethylhexyl palmitate catalyzed by lipase Fermase CALB 10000 in a solvent-free system using ultrasound technology. The central composite design (CCD) of response surface methodology with 4 factors at 3 levels consisting of acid to alcohol molar ratio (1:3-1:7), enzyme loading (3 %-7% (w/w)), ultrasound power (
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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17. 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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18. Fertilidade do solo e estoques de carbono e nitrogênio sob sistemas agroflorestais no Cerrado Mineiro
Resumo Os sistemas agroflorestais são utilizados para diversificar a produção de alimentos, proporcionar aumento na biodiversidade da fauna e da flora e conservação do carbono e nutrientes no solo. Sendo assim, o objetivo deste estudo foi avaliar a fertilidade e os estoques de carbono (C) e nitrogênio (N) do solo após dez anos de implantação de sist
Ciênc. Florest.. Publicado em: 30/09/2019
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19. Fatores associados à depressão em homens e mulheres presos
RESUMO: Introdução: As prevalências de depressão em presídios são altas, porém não há clareza sobre os fatores de risco entre os sexos. Analisamos os fatores associados à depressão entre homens e mulheres presos no estado de São Paulo. Metodologia: Estudo transversal, de 2006 a 2007, com amostra probabilística estratificada e em múltiplos e
Rev. bras. epidemiol.. Publicado em: 23/09/2019
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20. Ballistic Tests of Alumina-UHMWPE Composites Submitted to Gamma Radiation
The energy absorption in ballistic tests of alumina-ultra high molecular weight polyethylene (UHMWPE) composites with 60, 80 and 90 wt% alumina submitted to gamma radiation doses of 25, 50 and 75 kGy was investigated. The ballistic tests were carried out at subsonic speed using a compressed air system. The results showed that the composite with 80% alumina i
Mat. Res.. Publicado em: 22/08/2019
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21. Evaluation of the resistance of trussed slabs with steel formwork in cold formed U profile
Abstract In the last decades, the modernization in structural engineering has increased the use of steel-concrete composite and hybrid systems for slabs, when the adherence in the interface of the materials is present or not, respectively. In addition to the traditional steel deck, a similar solution for precast trussed slabs has been used for small construc
Lat. Am. j. solids struct.. Publicado em: 12/08/2019
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22. Fire exposure behavior of epoxy reinforced with jute fiber applied to ceramic tiles for a ventilated facade system
Civil construction seeks to increase the useful life of the facades of buildings. Installing a ventilated facade is one way to accomplish this due to aesthetic and technical advantages. Ceramic tiles are the main products used as the covering. To the back face of a tile, a bidirectional screen of glass fiber is adhered using epoxy resin. This set forms a com
Mat. Res.. Publicado em: 18/07/2019
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23. Six-month performance of restorations produced with the ethanol-wet-bonding technique: a randomized trial
Abstract This double-blind randomized controlled clinical trial evaluated the effectiveness of dentin pretreatment with 100% ethanol (EWBT – ethanol wet bonding technique) and different adhesive protocols in noncarious cervical lesions (NCCL) after 6 months. Patients presenting at least one NCCL were included. NCCLs (n=148) were randomly assigned to 4 grou
Braz. oral res.. Publicado em: 01/07/2019
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24. Bond strength and marginal microleakage in restorations photopolymerized with LED and halogen light associated with three application modes of a universal adhesive system: in vitro study
RESUMO Objetivo: Avaliar a resistência de união e microinfiltração marginal em restaurações de resina composta, utilizando sistema adesivo Single Bond Universal associado com fotoativadores Ultralux (halógeno) e Bluephase (LED). Métodos: Para resistência de união, oitenta terceiros molares humanos hígidos foram divididos: Halógena (n=40); LED (
RGO, Rev. Gaúch. Odontol.. Publicado em: 13/06/2019