Thermal Water
Mostrando 25-36 de 746 artigos, teses e dissertações.
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25. THERMAL CONDUCTIVITY ENHANCEMENT OF AQUEOUS IONIC LIQUID AND NANOPARTICLE SUSPENSION
Abstract In the present study, the thermal conductivities of ionic liquid + water in the concentrations 0.1-0.6 %w/w and temperatures (302.5-337.9 K) are determined. The thermal conductivity of aqueous 1-butyl-3-methylimidazolium bromide declined with increasing concentration and temperature. A quadratic model is developed for predicting the thermal conducti
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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26. Fabrication of Fish Gelatin Microfibrous Mats by Solution Blow Spinning
In this work microfiber mats of Nile tilapia (Oreochromis niloticus) gelatin were successfully fabricated by using Solution Blow Spinning technique. The concentration and viscosity of fish gelatin solution, in acid acetic/water (80% v/v), were correleted to the morphology and diameter of the gelatin microfibers. It was found that increased solution viscosity
Mat. Res.. Publicado em: 30/09/2019
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27. Effects of thermal treatments on chilling injury and shelf life time of Citrus reticulata Blanco1
RESUMO A tangerina ‘Arrayana’ (Citrus reticulata Blanco) é considerada a variedade mais cultivada na Colômbia. Apesar de ser uma fruta não climatérica, apresenta curta vida pós-colheita. Para avaliar os efeitos do tratamento térmico na injúria por frio e na vida útil dessa cultivar, frutos maduros foram selecionados e submetidos aos seguintes tra
Pesqui. Agropecu. Trop.. Publicado em: 26/09/2019
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28. Síntesis y caracterización de un novedoso biomaterial a base de quitosano modificado con aminoácidos
ABSTRACT The chemical modification of chitosan (CH) from shrimp shells (Litopenaeus vannamei) was performed with amino acids: L-leucine (Leu) and L-tyrosine (Tyr), in order to change some of its physical and chemical properties, which allow the enhancement of the applications of chitosan in biomedical and pharmacological areas. The characterization of chitos
Matéria (Rio J.). Publicado em: 16/09/2019
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29. Influence of graphene oxide on ‘in situ’ preparation of nanocomposites with polyvinyl butyral
ABSTRACT In this work, polyvinyl butyral (PVB) nanocomposites reinforced with 0.5 to 2.5 wt% of graphene oxide (GO) were synthesized via ‘in situ’ polymerization. PVB was obtained by condensation of hydroxyl groups of polyvinyl alcohol (PVA) with butyraldehyde (BU) Thermogravimetric analyzes (TGA) showed the increase in the thermal conductivity of the na
Matéria (Rio J.). Publicado em: 16/09/2019
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30. Efeitos da variação da concentração de solução polimérica aquosa a base de PVP na têmpera de aço AISI 4140
RESUMO A têmpera é um tratamento térmico que tem como principal objetivo a elevação de dureza e resistência mecânica dos aços por meio da sua transformação microestrutural. O processo se baseia na elevação da temperatura do material até a austenitização, seguida do arrefecimento por meio da imersão em um fluido, a qual precisa ser rápida o s
Matéria (Rio J.). Publicado em: 16/09/2019
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31. THE EFFECT OF CELLULOSE NANOCRYSTALS IN SUGARCANE BAGASSE PARTICLEBOARDS OF PITH AND FIBERS
ABSTRACT The aim of this research was to investigate sugarcane bagasse (SCB) particleboards, using two kinds of particles, from pith and fibers, reinforced with cellulose nanocrystals (NCC). The NCCs were dispersed in the adhesive urea formaldehyde (UF) using a sonificator in two proportions (0 and 1%). The NCCs and UF were applied in the SCB particles using
CERNE. Publicado em: 09/09/2019
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32. Mechanical properties of mortar produced with the replacement of natural sand by scheelite residue
Resumo O resíduo gerado pelas atividades industriais representa um custo, já que os geradores são responsáveis pela sua gestão, transporte, tratamento e disposição. O estado do Rio Grande do Norte, Brasil, é o maior produtor de resíduos de scheelita. O objetivo desta pesquisa foi caracterizar este resíduo de mineração, identificar sua similaridad
Cerâmica. Publicado em: 15/08/2019
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33. HYBRID SOLAR HEAT PUMP SYSTEM FOR WATER HEATING
ABSTRACT A comparative test of water heating between the hybrid system - solar collector with heat pump - and a system with conventional supplementary heating - with high electric power - was performed. For this, a small capacity heat pump was installed, which was later installed together with a solar heating system, composed of a 250 L thermal reservoir and
Eng. Agríc.. Publicado em: 12/08/2019
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34. Development of hollow fiber membranes with alumina and waste of quartzite
The development of ceramic membranes with different geometries and compositions extends the possibilities of industrial applications, inducing advantages in terms of increased permeability, membrane area by volume module and chemical, thermal and mechanical resistance. The use of low-cost raw materials is a trend that has grown in scientific research. The ai
Mat. Res.. Publicado em: 12/08/2019
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35. Solid-state Morphology Evolution of Sodium Neutralized Poly(ethylene-ran-methacrylic acid) Ionomer Under Dry and Wet Thermal Annealing
The DSC low temperature endothermic peak shown by sodium neutralized poly(ethylene-random-methacrylic acid) (E/MAA-Na+) ionomers in the range of 50-70 ºC is attributed to the endothermic reordering of polyethylene chain segments belonging to two populations of quasi-crystals set from melt, initially showing no birefringence. Dry or wet thermal annealing imp
Mat. Res.. Publicado em: 08/08/2019
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36. Influence of Zirconia-Coated Bioactive Glass on Gingival Fibroblast Behavior
Resumo O objetivo deste estudo foi o desenvolvimento de um recobrimento de vidro bioativo sobre a zircônia (Zr) para modular o fenótipo de fibroblastos gengivais. Para este propósito, partículas de Biosilicato® (6 mg/mL) em um veículo a base de água/álcool isopropílico (1:1) foram aplicadas sobre discos de zircônia seguido por tratamento térmico a
Braz. Dent. J.. Publicado em: 22/07/2019