Experimental And Molecular Dynamics Investigation Into The Amphiphilic Nature Of Sulforhodamine B, 2011 Massachusetts Institute of Technology
Experimental And Molecular Dynamics Investigation Into The Amphiphilic Nature Of Sulforhodamine B, Baris E. Polat, Shangchao Lin, Jonathan D. Mendenhall, Brett Vanveller, Robert Langer, Daniel Blankschtein
Sulforhodamine B (SRB), a common fluorescent dye, is often considered to be a purely hydrophilic molecule, having no impact on bulk or interfacial properties of aqueous solutions. This assumption is due to the high water solubility of SRB relative to most fluorescent probes. However, in the present study, we demonstrate that SRB is in fact an amphiphile, with the ability to adsorb at an air/water interface and to incorporate into sodium dodecyl sulfate (SDS) micelles. In fact, SRB reduces the surface tension of water by up to 23 mN/m, and the addition of SRB to an aqueous SDS ...
Anti-Neuroblastoma Activity Of Gold Nanorods Bound With Gd2 Monoclonal Antibody Under Near-Infrared Laser Irradiation, 2011 Michigan Technological University
Anti-Neuroblastoma Activity Of Gold Nanorods Bound With Gd2 Monoclonal Antibody Under Near-Infrared Laser Irradiation, Ching-An Peng, Chung-Hao Wang
Michigan Tech Publications
High-risk neuroblastoma is one of the most common deaths in pediatric oncology. Current treatment of this disease involves a coordinated sequence of chemotherapy, surgery, and radiation. Further advances in therapy will require the targeting of tumor cells in a more selective and efficient way so that survival can be improved without substantially increasing toxicity. To achieve tumor-selective delivery, disialoganglioside (GD2) expressed by almost all neuroblastoma tumors represents a potential molecular target that can be exploited for tumor-selective delivery. In this study, GD2 monoclonal antibody (anti-GD2) was conjugated to gold nanorods (GNRs) which are one of anisotropic nanomaterials that can absorb ...
Kinetic Characterization Of A Glycoside Hydrolase Family 44 Xyloglucanase/Endoglucanase From Ruminococcus Flavefaciens Fd-1, Christopher D. Warner, Rica M. Go, Carolina García-Salinas, Clark Ford, Peter J. Reilly
Chemical and Biological Engineering Publications
Two forms of Ruminococcus flavefaciens FD-1 endoglucanase B, a member of glycoside hydrolase family 44, one with only a catalytic domain and the other with a catalytic domain and a carbohydrate binding domain (CBM), were produced. Both forms hydrolyzed cellotetraose, cellopentaose, cellohexaose, carboxymethylcellulose (CMC), birchwood and larchwood xylan, xyloglucan, lichenan, and Avicel but not cellobiose, cellotriose, mannan, or pullulan. Addition of the CBM increased catalytic efficiencies on both CMC and birchwood xylan but not on xyloglucan, and it decreased rates of cellopentaose and cellohexaose hydrolysis. Catalytic efficiencies were much higher on xyloglucan than on other polysaccharides. Hydrolysis rates increased with ...
An Examination Of The Thermodynamics Of Fusion, Vaporization, And Sublimation Of Several Parabens By Correlation Gas Chromatography, Patamaporn Umnahanant, James Chickos
No abstract provided.
New Nanosystem Mixed Reactor For Urban Wastewater Treatment, 2011 SelectedWorks
New Nanosystem Mixed Reactor For Urban Wastewater Treatment, Masoud Rastegar
No abstract provided.
Laser Radiation Co2 Effects In Cement Paste At Different Hydration Stages, 2011 Instituto Tecnológico de Aguascalientes
Laser Radiation Co2 Effects In Cement Paste At Different Hydration Stages, María Del Rosario Moreno-Virgen, Juan Jose Soto-Bernal, Claudio Frausto-Reyes, Adrian Bonilla-Petriciolet, Jose T. Vega-Duran, Jorge Pineda-Piñon, José Angel Ortíz-Lozano
In this work the changes occurring in cement pastes irradiated by 10.6µm CO2 laser at diff erent stages of hydration after preparation are presented. Raman spectroscopy, X-ray diffraction and Scanning Electronic Microscopy (SEM) techniques were used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm-1, 563cm-1, 695cm-1, 750cm-1, 897cm-1, 1042cm-1 and 1159cm-1 that correspond to compounds already present in cement pastes. X-ray diffraction, SEM ...
Ant Colony Optimization: A New Stochastic Solver For Modeling Vapor-Liquid Equilibrium Data, 2011 Universidad de Guanajuato
Ant Colony Optimization: A New Stochastic Solver For Modeling Vapor-Liquid Equilibrium Data, Jorge A. Fernández-Vargas, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernández, Salvador Hernández-Castro
In this study, a new stochastic global optimization method based on Ant Colony Optimization (ACO) has been developed and used to solve the parameter estimation problem in vapor-liquid equilibrium data modeling. ACO is a relatively novel stochastic optimization method that mimics foraging behavior of ant colonies. We have developed a new version of ACO, which employs feasible region selection, for performing global optimization in problems with continuous decision variables. The performance of this new ACO has been tested in the modeling of vapor-liquid equilibrium data using both the classical least squares and error-in-variable formulations. Our results show that this new ...
Constrained And Unconstrained Gibbs Energy Minimization In Reactive Systems Using Genetic Algorithms And Differential Evolution With Tabu List, 2011 National University of singapore
Constrained And Unconstrained Gibbs Energy Minimization In Reactive Systems Using Genetic Algorithms And Differential Evolution With Tabu List, Adrian Bonilla-Petriciolet, Gade Pandu Rangaiah, Juan Gabriel Segovia-Hernandez
Phase equilibrium modeling plays an important role in design, optimization and control of separation processes. The global optimization problem involved in phase equilibrium calculations is very challenging due to the high non-linearity of thermodynamic models especially for multi-component systems subject to chemical reactions. To date, a few attempts have been made in the application of stochastic methods for reactive phase equilibrium calculations compared to those reported for non-reactive systems. In particular, the population-based stochastic methods are known for their good exploration abilities and, when optimal balance between the exploration and exploitation is found, they can be reliable and efficient global ...
Evaluation Of Stochastic Global Optimization Methods In The Design Of Complex Distillation Configurations, 2011 Universidad de Guanajuato
Evaluation Of Stochastic Global Optimization Methods In The Design Of Complex Distillation Configurations, Julian Cabrera-Ruiz, Erick Miranda-Galindo, Juan Gabriel Segovia-Hernandez, Salvador Hernandez, Adrian Bonilla-Petriciolet
In this chapter, we have implemented several stochastic global optimization methods to obtain the design and optimization of three distillation sequences: multicomponent conventional distillation system, thermally coupled reactive scheme with side stripper, and a dividing wall distillation column. Specifically, these stochastic optimization methods are: Simulated Annealing (SA), Harmony Search (HS) and Genetic Algorithms (GA). Therefore, we have studied the design of these distillation schemes using stochastic global optimization methods coupled to the Aspen One Aspen Plus process simulator for the evaluation of the objective function, ensuring that all results obtained are rigorous. To the best of our knowledge, the evaluation ...
A Short Method To Calculate Residue Curve Maps In Multireactive And Multicomponent Systems, 2011 Universidad de Guanajuato
A Short Method To Calculate Residue Curve Maps In Multireactive And Multicomponent Systems, Marcelino Carrera-Rodriguez, Juan Gabriel Segovia-Hernández, Adrian Bonilla-Petriciolet
Reactive residue curve maps (RRCM) are useful for the design of reactive distillation columns as a tool to establish feasible zones of reaction-separation. However, the calculation of RRCM usually involves great computational effort due to the nonlinearity of the model equations and its iterative nature for the determination of reactive phase equilibrium. In this study, a simplified method for the generation of RRCM is presented. This method is based on the application of reaction-invariant composition variables and assumes that the phase equilibrium constants (i.e., the relative volatilities) are independent of the temperature. Specifically, the phase equilibrium constants are calculated ...
Phase Equilibrium Modeling In Non-Reactive Systems Using Harmony Search, 2011 Universidad de Guanajuato
Phase Equilibrium Modeling In Non-Reactive Systems Using Harmony Search, Adrian Bonilla-Petriciolet, Didilia I. Mendoza-Castillo, Juan Gabriel Segovia-Hernandez, Juan Carlos Tapia-Picazo
This chapter introduces the application of Harmony Search-based algorithms to solve phase stability and equilibrium problems in multicomponent non-reactive systems. Particularly, the performance and capabilities of Harmony Search in the modeling of phase equilibrium is studied and discussed.
Free Radicals Copolymerization Optimization, System: Acrylonitrile-Vinyl Acetate In Cstr, 2011 Instituto Tecnológico de Aguascalientes
Free Radicals Copolymerization Optimization, System: Acrylonitrile-Vinyl Acetate In Cstr, Silvia V. Vallecillo-Gomez, Juan C. Tapia-Picazo, Adrian Bonilla-Petriciolet, Gibran G. De-Alba-Perez-De-Gracia
In this work, we study the free radicals solution copolymerization, system acrylonitrile (AN) – vinyl acetate (VA), with the objective to find the parameters of characteristic correlations that are used to determine the reaction autoacceleration phenomenon or gel effect. Two gel effect correlations were evaluated for each monomer. Parameters were found using the stochastic global optimization Simulated Annealing method and experimental data in batch reactor. Gel effect correlations with greater adjustment were used to carry out a sensitivity analysis through continuous stirred tank reactor model. A competence between monomers conversion, average molecular weight of the polymer and the polidispersity was observed ...
Novel Bare-Bones Particle Swarm Optimization And Its Performance For Modeling Vapor-Liquid Equilibrium Data, 2011 National University of singapore
Novel Bare-Bones Particle Swarm Optimization And Its Performance For Modeling Vapor-Liquid Equilibrium Data, Haibo Zhang, Devid D. Kennedy, Gade Pandu Rangaiah, Adrian Bonilla-Petriciolet
Parameter estimation in models plays a significant role in developing mathematical models which are used for understanding and analyzing physical, chemical and biological systems. Parameter estimation problems for vapor–liquid equilibrium (VLE) data modeling are very challenging due to the high nonlinearity of thermodynamic models. Recently, stochastic global optimizations and their applications to these problems have attracted greater interest. Of the many stochastic global optimization methods, Bare bones particle swarm optimization (BBPSO) is attractive since it has no parameters to be tuned by the user. In this study, modifications are introduced to the original BBPSO using mutation and crossover operators ...
Batch And Column Studies Of Zn2+ Removal From Aqueous Solution Using Chicken Feathers As Sorbents, 2011 Instituto Tecnológico de Aguascalientes
Batch And Column Studies Of Zn2+ Removal From Aqueous Solution Using Chicken Feathers As Sorbents, Ismael Alejandro Aguayo-Villarreal, Adrian Bonilla-Petriciolet, Virginia Hernández-Montoya, Miguel A. Montes-Morán, Hilda Elizabeth Reynel-Avila
We report the removal of zinc ions from aqueous solution by raw chicken feathers using both batch and continuous systems. Specifically, kinetic and sorption isotherms have been determined considering the effect of temperature, pH and metal concentration. Batch sorption data were fitted to various sorption models and results indicate that Zn2+ sorption process using raw chicken feathers followed the pseudo-second order rate model, while sorption isotherms were described properly by Sips isotherm. Sorption isotherms show that the experimental maximum sorption capacity of Zn2+ was found to be 4.31 mg/g at 30 °C and pH 5 and that chemisorption ...
Role Of The Pericarp Of Carya Illinoinensis As Biosorbent And Precursor Of Activated Carbon For The Removal Of Lead And Acid Blue 25 In Aqueous Solution, 2011 Instituto Tecnológico de Aguascalientes
Role Of The Pericarp Of Carya Illinoinensis As Biosorbent And Precursor Of Activated Carbon For The Removal Of Lead And Acid Blue 25 In Aqueous Solution, Virginia Hernández-Montoya, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet, María Ana Pérez-Cruz, Miguel A. Montes-Moran
The pecan nuts are widely cultivated in states of north of Mexico and the residues generated during nut processing are abundant and not reused. In the present study, the pericarp of pecan (PP) was physicochemically characterized and their use as low cost biosorbent of lead and acid blue 25 was studied in batch systems at different experimental conditions. Also, the PP was used as precursor of activated carbon and a natural modifier agent extracted from egg shells was used in the synthesis of the carbons. Results suggest that the pericarp of pecan (PP) has an acidic character due to the ...
Improving The Adsorption Of Heavy Metals From Water Using Commercial Carbons Modified With Egg Shell Wastes, 2011 Instituto Tecnológico de Aguascalientes
Improving The Adsorption Of Heavy Metals From Water Using Commercial Carbons Modified With Egg Shell Wastes, Alejandro Guijarro-Aldaco, Virginia Hernandez-Montoya, Adrian Bonilla-Petriciolet, Miguel A. Montes-Moran, Didilia I. Mendoza-Castillo
We introduce the application of hen egg shell waste to improve the adsorption capacities of heavy-metal ions using commercial carbons via the modification of their surface chemistry. Specifically, a calcium solution extracted from egg shell waste has been used as a low-cost activation agent to improve the adsorption properties of three commercial carbons. An orthogonal array of the Taguchi method has been applied to identify the optimal conditions for the adsorbent modification process using the Zn batch adsorption, at 30 °C and pH 5, as the response variable. Our results show that maximum adsorption capacities of Cd, Ni, and Zn ...
Kinetic And Thermodynamic Modeling Of Cd+2 And Ni+2 Biosorption By Raw Chicken Feathers, 2011 Universidad de Guanajuato
Kinetic And Thermodynamic Modeling Of Cd+2 And Ni+2 Biosorption By Raw Chicken Feathers, Hilda E. Reynel-Avila, Guadalupe De La Rosa, Cintia Karina Rojas-Mayorga, Irene Cano-Aguilera, Adrian Bonilla-Petriciolet
Batch experiments were performed to model kinetic and thermodynamic data for Cd and Ni biosorption by raw chicken feathers (CFs) under different conditions. Results indicated that Cd and Ni sorption onto CFs occurred on the external surface of the biosorbent. Ion removal increased with pH, whereas both endothermic and exothermic stages where observed depending on temperature. Our calculated thermodynamic parameters showed that, below the temperature of 30°C, the metal uptake of Cd and Ni ions may be mainly controlled by a chemisorption process. However, for temperatures higher than 30°C, it is likely that sorption of both metals onto ...
Integrated Differential Evolution For Global Optimization And Its Performance For Modeling Vapor-Liquid Equilibrium Data, 2011 National University of singapore
Integrated Differential Evolution For Global Optimization And Its Performance For Modeling Vapor-Liquid Equilibrium Data, Haibo Zhang, Gade Pandu Rangaiah, Adrian Bonilla-Petriciolet
Parameter estimation in thermodynamic models has been of great interest in chemical engineering due to its complex nature such as non-linearity, flat objective function in the neighborhood of global optimum, badly scaled model and non-differential term(s) in the equations. In this paper, a stochastic global optimization algorithm, named, integrated differential evolution (IDE) is introduced to solve the parameter estimation problems for modeling vapor-liquid equilibrium (VLE) data. In IDE, the choice of mutation strategy and associated parameters are adapted according to the learning experience from previous generations. The tabu list used in IDE can avoid revisiting the same area and ...
Copolimerizacion Injertada De Almidón Con Poli(Acrilonitrilo) Y Acetato De Vinilo Mediante Radicales Libres En Solución: Síntesis Y Caracterización, 2011 Instituto Tecnológico de Aguascalientes
Copolimerizacion Injertada De Almidón Con Poli(Acrilonitrilo) Y Acetato De Vinilo Mediante Radicales Libres En Solución: Síntesis Y Caracterización, Jose A. Dena-Aguilar, Juan Jauregui-Rincon, Adrian Bonilla-Petriciolet, Iliana Ernestina Medina-Ramirez, Jorge Romero-Garcia
En este estudio, copolímeros injertados de almidón (ALM) con acrilonitrilo (AN) y acetato de vinilo (AV) (PAN-co-ALM) fueron preparados mediante métodos de copolimerización injertada en solución bajo una atmósfera oxidante normal (en presencia de aire). Las reacciones de injerción fueron iniciadas por procesos de radicales libres, empleando persulfato de amonio (PA) y bisulfito de sodio (BS) como iniciadores. Se determinó que el rendimiento de injerción (%G) es dependiente de las concentraciones de almidón y de los iniciadores considerados. Las muestras de copolímeros de PAN-co-ALM fueron caracterizadas por gravimetría, técnicas de espectroscopia infrarroja con transformada de Fourier (FTIR), microscopia electrónica de ...
Short-Cut Method For The Design Of Reactive Distillation Columns, 2011 Universidad de Guanajuato
Short-Cut Method For The Design Of Reactive Distillation Columns, Marcelino Carrera-Rodriguez, Juan Gabriel Segovia-Hernandez, Adrian Bonilla-Petriciolet
The design of Reactive Distillation (RD) has received significant attention due to the technological and economical advantages obtained from the simultaneous occurrence of reaction and separation. Although these advantages of RD are well documented in literature, the commercial applications of RD are still limited because of the control and operation complexity of these separation systems and the need for improving software tools to reliably model and design RD columns. In this study, a robust short-cut method for the design of multicomponent reactive distillation is presented. This method is based on distillation lines and tray-by-tray calculations defined in terms of reaction-invariant ...