Water Heating
Mostrando 13-24 de 319 artigos, teses e dissertações.
-
13. Avaliação da influência do glicerol em matriz cerâmica
RESUMO O presente trabalho avalia os efeitos da adição de glicerol sobre a porosidade e resistência mecânica de um material cerâmico. As amostras foram compactadas por prensagem uniaxial e submetidas a temperaturas de queima de 950 °C e 1100 °C, com taxa de aquecimento de 7 °C min-1. Foram realizados ensaios físicos e mecânicos para analisar porosi
Matéria (Rio J.). Publicado em: 20/05/2019
-
14. Influence of Processing Variables on Clay-Based Ceramic Formulations
The properties of ceramic materials and microstructural changes are dependent on the raw materials from which they are made and on the manner in which they are processed, from the composition to the established thermal treatment, heating rate, and firing temperature. In this study, the influence of some processing parameters (formulation, maturation time, an
Mat. Res.. Publicado em: 11/03/2019
-
15. Effect of sol-gel processing parameters on structure of zirconia
Abstract The present study reports the experimental results regarding the effect of molar ratio of hydrolysis water used in the sol-gel synthesis upon the structure of zirconia. The ZrO2 materials were synthesized via simple metal-chelate route using zirconium n-propoxide [Zr(OCH2CH2CH3)4], n-propanol, acetic acid, and deionized water. Thermogravimetric anal
Cerâmica. Publicado em: 2019-01
-
16. Influencia de los tratamientos térmicos en recubrimientos anódicos nanotubulares de TiO2
ABSTRACT TiO2 is a semiconductor widely used in heterogeneous photocatalysis processes for water decontamination. Several studies indicate that ordered nanostructures in anatase phase improve the photocatalytic properties with respect to other morphologies and crystal structures of TiO2. The aim of the present work is to evaluate the influence of different t
Matéria (Rio J.). Publicado em: 19/07/2018
-
17. Improved Method for Preparation of Methoxy-Modified Kaolinite
A hydrated kaolinite-methanol intercalation compound (Kaol-MeOH (hydrated)) was synthesized by utilizing kaolinite/dimethyl sulfoxide intercalation compound (Kaol-DMSO) as an intermediary, and further displacement intercalation with butyl trimethylammonium chloride (BTAC) was also carried out. The obtained samples were characterized by X-ray diffraction (XRD
J. Braz. Chem. Soc.. Publicado em: 2018-01
-
18. FTIR study of aquamarines after gamma irradiation, heat treatment and electrodiffusion
Abstract Beryl, Be3Al2(SiO3)6, is a natural gemstone with many colors. Some of these colors can be induced or modified by exposure to ionizing radiation, by heating, and maybe by electrodiffusion. Small contents of chromophore chemical elements are related to the colors of beryl, like iron, chromium, vanadium, manganese, and others. There is great interest i
REM, Int. Eng. J.. Publicado em: 2017-09
-
19. Tailored Degree of Functionalization and Length Preservation of Multiwalled Carbon Nanotubes by an Optimized Acid Treatment Process
The introduction of oxygen groups in carbon nanotubes is considered crucial for many applications. However, there is a lack of controlled functionalization methods which ensure nanotubes with specific property values according to each interest. In this work, acid treatments of multiwalled carbon nanotubes (MWCNTs) employing an optimized ultrasound process wi
J. Braz. Chem. Soc.. Publicado em: 2017-07
-
20. Heat pump for thermal power production in dairy farm
ABSTRACT Besides cold for milk cooling, dairy facilities need to produce hot water for cleaning of tools and equipment. Overall, ohmic heating has been used in dairy farms, increasing power consumption and manufacturing costs. Therefore, as an alternative to reduce power consumption, this paper proposed a water-water heat pumping for simultaneous cold and he
Eng. Agríc.. Publicado em: 2016-10
-
21. Evaluating the "Tape Tea" Myth as Low Cost Abuse Drug through Mass Spectrometry
The role of the "tape tea" as a low cost abuse drug is evaluated, by searching for possible inorganic and organic compounds after its preparation. Two energy sources are evaluated (conventional and microwave heating) for preparing the "tape tea" using new or used cassette (K7) or video home system (VHS) tapes. After optimizing all the inductively coupled pla
J. Braz. Chem. Soc.. Publicado em: 2016-10
-
22. Thermal inactivation studies on toxic seeds from fruits of the Brazilian Central Plain
Abstract Seeds from endemic Brazilian fruits (Mangaba, Cagaita, Jatobá and Araticum), previously confirmed to be toxic using Artemia salina bioassay were exposed to different temperatures and heating times aiming to test inhibitory effects on toxicity, as a first approach to characterize and identify toxic compounds and their thermal stability. After treatm
Food Sci. Technol. Publicado em: 19/09/2016
-
23. Phytochemical Profile of Seed Extracts of Plants Typical of the Brazilian Semiarid and their Potential Application in Brackish Water Desalination
The phytochemical profile of typical seeds from semiarid areas of Bahia was explored. The desalination capacity of the seeds discovered in previous studies considered the seeds potentially suitable for desalination of water. Coals composed of crushed seeds of umbu (Spondias tuberosa Arr. Cam.) and umburana (Amburana cearensis A. C. Sm.) were prepared by heat
J. Braz. Chem. Soc.. Publicado em: 2016-09
-
24. Generation of Volatile Compounds from Carotenoids of Dunaliella bardawil Algae by Water Bath Heating and Microwave Irradiation
The volatile compounds formed by thermal degradation of the carotenoids present in Dunaliella bardawil were investigated by microwave irradiation (MW) and water bath heating (WB) in different conditions of temperature and time using central composite design. Volatiles extraction by solid phase microextraction (SPME) was optimized and performed at 40 °C for
J. Braz. Chem. Soc.. Publicado em: 2016-08