Muñoz-Mizuno, Andrea, Daza-Quintero, Jenny Paola, Quintero-Quiroz, Carlos Eduardo, Peña-Ballesteros, Darío Yesid, and Sandoval-Amador, Anderson Andrés
Revista Facultad de Ingeniería - UPTC; abr-jun2019, Vol. 28 Issue 51, p9-23, 14p
Subjects
ENERGY dispersive X-ray spectroscopy, HYDROXYAPATITE coating, LASER ablation, YAG lasers, BONE substitutes, and SCANNING electron microscopy
Abstract
Copyright of Revista Facultad de Ingeniería - UPTC is the property of Universidad Pedagogica y Tecnologica de Colombia, Facultad de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
The effect of different application amounts of nanofibrilated cellulose (CNF), from 0 to 6%, on the physico-mechanical properties of the paper obtained from stone ground wood pulp fiber has been studied. The results have been compared with the conventional beating process at different degrees (from 0 to 2500 rpm). Afterwards the effect of the application of CNF on the surface, in papers with and without CNF in bulk, has been studied. The results showed that the paper stiffness and breaking length increased with freeness; however the Schopper-Riegler grade (°SR) increased significantly hindering drainage. The contribution of CNF in bulk also increased °SR and breaking length, therefore the °SR beaten at 1500 rev was equivalent to a content of CNF between 4,5 and 6%, but its breaking length was found to be substantially greater. It can be concluded that the CNF in bulk can be viewed as an alternative to mechanical beating and that the application of CNF at the paper surface allows increasing strength properties without affecting the drainage capacity. [ABSTRACT FROM AUTHOR]
HEAT transfer, THERMOPLASTICS, CRYSTALLINE polymers, PLASTIC molds, and THERMAL conductivity
Abstract
A study on the heat transfer in a mold, comparing experimental injection tests using a mold with and without surface treatment (nitriding) is presented. Process simulations were carried out using Computer Aided Engineering tools (CAE) for the estimation of the initial parameters to be applied in the tests in instrumented P20 steel injection molds with the polymer crystal polystyrene. Results indicated a reduction of cooling time and of the time of the process in the mold with treatment, due to an increase of the thermal conductivity. [ABSTRACT FROM AUTHOR]
V. Niño, Ely Dannier, Moreno, Jaime Dulce, Garnica, Hernán Alfonso, Dugar-zhabon, Valeriy, Peña Rodríguez, Gabriel, and Tsygankov, Petr
Iteckne; ene-jun2012, Vol. 9 Issue 1, p14-20, 7p
Subjects
HIGH voltages, ELECTRIC arc, MICROSCOPY, METALLIC surfaces, and ATOMS
Abstract
Copyright of Iteckne is the property of Universidad Santo Tomas, Division de Ingenierias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
González, José María Martinez, Sabán, Francisco García, Bernal, Javier Ferrándiz, Lafuente, Juan Carlos Gonzalo, Sánchez, Jorge Cano, and Dorado, Cristina Barona
Copyright of Medicina Oral, Patologia Oral y Cirugia Bucal is the property of Medicina Oral SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
SCANNING electron microscopy, TITANIUM dioxide, SPECTROMETRY, and ORAL surgery
Abstract
Copyright of Medicina Oral, Patologia Oral y Cirugia Bucal is the property of Medicina Oral SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
