Infrared Radiation
Mostrando 13-24 de 168 artigos, teses e dissertações.
-
13. Effect of fluoride application during radiotherapy on enamel demineralization
Abstract Radiation-related caries are one the most undesired reactions manifested during or after head and neck radiotherapy. Fluoride application is an important strategy to reduce demineralization and enhance remineralizaton. Objective: To evaluate the effect of the topical application of fluoride during irradiation on dental enamel demineralization. Mat
J. Appl. Oral Sci.. Publicado em: 10/12/2018
-
14. Study on Preparation and Performance of High Swelling Bentonite
ABSTRACT For improving the expansibility of natural Ca-based bentonite (Ca-Bent), the Ca-Bent was modified with sodium dodecyl benzene sulfonate(SDBS)-Na2CO3 complex agent by microwave semi-dry method. And the ratio of Na2CO3 to SDBS, microwave power, radiation time and initial temperature on the modification were studied. Furthermore, X-ray diffraction (XRD
Matéria (Rio J.). Publicado em: 18/10/2018
-
15. Evaluation of Fracture Toughness of Ultraviolet-Irradiated Polycarbonate Using the Essential Work of Fracture Method
The essential work of fracture (EWF) method provides useful parameters to characterize the fracture toughness of polymers exposed to degrading environments under conditions associated with plane-stress state of failure. Exposure of polymeric engineering materials to ultraviolet (UV) radiation may produce macromolecular changes that impair their fracture toug
Mat. Res.. Publicado em: 26/07/2018
-
16. Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
Photodegradation of PCL was performed exposing injected specimens to ultraviolet radiation (UV-B) up to 9 weeks. Photodegradated PCL specimens were tested by Differential Scanning Calorimetry (DSC), Infrared Spectroscopy (FTIR), mechanical properties, Optical Microscopy (MO) and Scanning Electron Microscopy (SEM).Upon exposure decrease in elongation at break
Mat. Res.. Publicado em: 16/07/2018
-
17. Thermographic Images to Measure Health Risks of Workers Exposed to Artificially Refrigerated Environments
ABSTRACT Thermography generates high-resolution imagery in real time and is a non-invasive and painless technique devoid of physical contact or exposure to any type of radiation. This technique has been successfully applied to different areas, such as health- and safety-related applications, to control cold risk in workers exposed to low-temperature environm
Braz. J. Poult. Sci.. Publicado em: 2018-04
-
18. Optimal hydrated lime concentration in asphalt binder to improve photo degradation resistance
Abstract The effect of short-term oxidation, evaluated by using a Rolling Thin Film Oven Test, and the effect of weathering aging on the oxidation process of hydrated lime modified asphalts were studied. Hydrated lime (HL) has been known as an additive for asphalt mixtures and is now considered as a binder additive that increases asphalt mixture durability.
REM, Int. Eng. J.. Publicado em: 2018-04
-
19. Production Indicators and Levels of Corticosterone in Pullets Treated with Beak-Trimming Protocols
ABSTRACT The aim of this study was to compare the effects of beak trimming by hot blade or infrared radiation on production indicators and plasma levels of corticosterone in pullets. During the rearing phase, an entirely random delineation was used a 2 x 3 factorial design (two different techniques for beak trimming x 3 strains), a total of six treatments wi
Rev. Bras. Cienc. Avic.. Publicado em: 2018-03
-
20. Mineral inclusions in diamonds from Chapada Diamantina, Bahia, Brazil: a Raman spectroscopic characterization
Abstract The Chapada Diamantina, located in the central region of the State of Bahia, is of important historical significance due to its diamond occurrences. Discovered in the nineteenth century, comprehensive research about the regional diamonds and their origins are still limited, demanding more investigation in the matter. Looking for insights about their
REM, Int. Eng. J.. Publicado em: 2018-03
-
21. Modeling of the temperature field generated by the deposition of weld bead on a steel butt joint by FEM techniques and thermographic images.
The aim of this work is to predict the temperature field generated by welding a steel butt joint (API 5L X80). The prediction was modeled by finite element software Abaqus where the subroutine was developed in Fortran so that heat source motion may be included. The motion was based on the Goldak's double ellipsoid. In the model material nonlinearities were i
Mat. Res.. Publicado em: 23/02/2018
-
22. Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR-Chemometric Analysis
Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the
J. Braz. Chem. Soc.. Publicado em: 2018-01
-
23. Performance of Commercial Laying Hen Submitted to Different Debeaking Methods
ABSTRACT Among the several factors required in breeding laying hens, debeaking is a factor that interferes with batch performance and affects animal welfare. Thus, the objective of this study was to evaluate three different debeaking procedures and to verify the best technique to be used. For this, the performance of the birds, the incidence of cannibalism,
Rev. Bras. Cienc. Avic.. Publicado em: 2017-12
-
24. 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