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Manila, Philippines

Mapúa Institute of Technology is a non-sectarian, research oriented, Filipino tertiary institute located in Intramuros, Manila and in Makati.It was founded by the first registered Filipino architect, Don Tomas Mapua, in 1925, a graduate of Cornell University. After he died, the tradition was continued by his children, Don Óscar B. Mapúa Sr., a graduate in Civil Engineering from the Massachusetts Institute of Technology, and Gloria Mapúa-Lim.Mapua Institute of Technology is the premiere engineering school in the Philippines. It is a reputable source of architects, engineers, and science graduates and constantly produces top notchers in the architectural and engineering fields as the Mapúa Institute of Technology heavily specializes in these fields in the undergraduate and graduate levels, aside from its widening array of undergraduate programs such as Psychology, Computer Science, Digital Cinema, Multimedia Arts and science, Technical Communication, Information Technology, Accounting, Entrepreneurship, Business Management, Hotel & Restaurant Management, and Nursing.The Institute has been granted with the Level IV Accredited Status to its Civil Engineering program by the Philippine Association of Colleges and Universities Commission on Accreditation , which is one of the first engineering programs to be accorded such status. In addition, the Commission on Higher Education recently recognized Mapúa’s Mechanical Engineering , Computer Engineering and Electronics Engineering programs as Centers of Development for Engineering .Mapúa is also the first Philippine and Southeast Asian educational institution to have ABET certification, rendering the Institute to be at par with US-based colleges and universities. Wikipedia.

Mananghaya M.R.,Mapua Institute of Technology
Journal of the Korean Chemical Society | Year: 2012

Dopants and defects can be introduced as well as the intercalation of metals into single wall carbon nanotubes (SWCNTs) to modify their electronic and magnetic properties, thus significantly widening their application areas. Through spinpolarized density functional theory (DFT) calculations, we have systemically studied the following: (i) (10,0) and (5,5) SWCNT doped with nitrogen (CN xNT), (ii) (10,0) and (5,5) SWCNT with pyridine-like defects (3NV-CN xNT), and (iii) chemical functionalization of (10,0) and (5,5) 3NV-CNxNT with 12 different transition metals (TMs) (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pd, and Pt). Attention was done in searching for the most stable configurations, deformation, calculating the formation energies, and exploring the effects of the doping concentration of nitrogen and pyridine-like nitrogenated defects on the electronic properties of the nanotubes. Also, calculating the corresponding binding en rgies and effects of chemical functionalization of TMs on the electronic and magnetic properties of the nanotubes has been made. We found out that the electronic properties of SWCNT can be effectively modified in various ways, which are strongly dependent not only on the concentration of the adsorbed nitrogen but also to the configuration of the adsorbed nitrogen impurities, the pyridine-like nitrogenated defects, and the TMs absorbed; due to the strong interaction between the d orbitals of TMs and the p orbitals of N atoms, the binding strengths of TMs with the two 3NV-CNxNT are significantly enhanced when compared to the pure SWCNTs.

Leron R.B.,Chung Yuan Christian University | Soriano A.N.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of the Taiwan Institute of Chemical Engineers | Year: 2012

Deep eutectic solvents (DES) are new emerging alternatives to conventional ionic liquids that may find a number of interesting applications in industrial and chemical processes. In this study, the densities, ρ, and refractive indices, n D, of the DESs (choline chloride+ethylene glycol) and (choline chloride+glycerol) and their aqueous mixtures were investigated at atmospheric pressure over the temperature range 298.15-333.15K and across a complete composition range. The excess molar volumes, V E, and refractive index deviations, Δn D, were also calculated from experimental results. The calculated excess molar volumes were negative at all temperatures over the entire range of composition considered, suggesting the presence of strong interactions between water and the DES in the mixtures. The refractive index deviations, on the other hand, were found positive in the entire concentration range. The calculated properties were fitted to a Redlich-Kister type equation to correlate them to the temperature and composition. The correlations used satisfactorily represent the densities and refractive indices of the pure DESs and their aqueous binary mixtures as functions of temperature and composition as indicated by the low overall average absolute deviations obtained in the calculations. © 2012 Taiwan Institute of Chemical Engineers.

Siongco K.R.,Chung Yuan Christian University | Leron R.B.,Chung Yuan Christian University | Leron R.B.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of Chemical Thermodynamics | Year: 2013

In this work, we report new experimental data on density, ρ, refractive index, nD, and viscosity, η, of two deep eutectic solvents, N,N-diethylethanol ammonium chloride-glycerol (DEACG) and N,N-diethylethanol ammonium chloride-ethylene glycol (DEACEG), and their aqueous solutions, over the complete composition range, at temperatures from (298.15 to 343.15) K. Densities and viscosities were measured using the vibrating tube and the falling ball techniques, respectively, while the refractive index at the sodium D line was measured using an automatic refractometer. We aimed to represent the measured properties as a function of temperature and composition, and correlated them using the Redlich-Kister-type equation, for density, a polynomial function, for refractive index, and the Vogel-Fulcher-Tammann (VFT) equation, for viscosity. © 2013 Elsevier Ltd. All rights reserved.

Chang Y.-C.,Chung Yuan Christian University | Leron R.B.,Chung Yuan Christian University | Leron R.B.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of Chemical Thermodynamics | Year: 2013

In this study, we report new experimental measurements on the solubility of carbon dioxide in aqueous blended amine solutions containing diethylenetriamine (DETA) and piperazine (PZ) (at 30 wt% total amine concentration). Solubility data for CO2 in aqueous DETA solutions at several concentrations (20, 30, 40) wt% are also presented. Measurements were performed in a vapor-liquid equilibrium apparatus at temperatures (313.2, 333.2, 353.2) K and pressures up to around 900 kPa. It was found that the solubility of CO2 in the systems studied were appreciably higher than in typical amine solvents. A modified Kent-Eisenberg model was used to correlate the obtained solubility of CO2 (expressed as mole CO2 per mole amine) in the solvent with CO2 partial pressure, temperature, and amine concentration. The model gave satisfactory representations of the solubility data at reasonable average absolute deviations between the experimental and the calculated values (of CO2 partial pressures) of 16% and 17%, for the binary and ternary systems, respectively. © 2013 Elsevier Ltd. All rights reserved.

Soriano A.N.,Chung Yuan Christian University | Doma Jr. B.T.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of the Taiwan Institute of Chemical Engineers | Year: 2010

This work was the continuation of our previous study where the correlations between density and refractive index of pure systems of ionic liquids were examined. The density and refractive index of five 1-ethyl-3-methylimidazolium-based ionic liquids were measured at standard pressure and temperature up to 353.2 K. Densities and refractive indices of the studied ionic liquids were presented as a function of temperature. A group contribution-based equation was used to represent the temperature dependence of density and refractive index. The Lorentz-Lorenz, Dale-Gladstone, Eykman, Oster, Arago-Biot, and Newton equations, as well as a modified Eykman were used to correlate the relation between the measured densities and refractive indices. The correlations give satisfactory results. © 2009 Taiwan Institute of Chemical Engineers.

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