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Santos-Ballardo D.U.,Autonomous University of Sinaloa | Santos-Ballardo D.U.,Polytechnic University of Sinaloa | Rossi S.,Autonomous University of Barcelona | Reyes-Moreno C.,Autonomous University of Sinaloa | Valdez-Ortiz A.,Autonomous University of Sinaloa
Reviews in Environmental Science and Biotechnology | Year: 2016

In recent years, the world energy demands have had a recurrent increase. For this reason the alternative to the fossil fuel resources are trend topics in investigation. Microalgae have been extensively studied as a source of biofuels and as one of the most promising alternatives in this new framework. One of the possibilities of obtaining renewable energy from microalgae is biogas production using anaerobic digestion process. This process is considered a significant component for biofuels and waste management, since represent an opportunity for energy generation using different wastewater products; also, the economic viability of microalgae liquid biofuel production could be improved. However, the anaerobic digestion of microalgae biomass is still not optimized because of the numerous technical limitations such as the microalgae characteristics, low carbon:nitrogen ratio, ammonia toxicity and even salinity. The present review summarizes and compares information concerning to anaerobic digestion of microalgal biomass and future directions for research. Besides, specific operational factors and potential inhibitory parameters of the process are analyzed and compared. Additionally, the paper covers the state or art concerning in methane production enhancement from algal biomass. © 2016 Springer Science+Business Media Dordrecht Source


Ostos Robles R.,National Polytechnic Institute of Mexico | Ramos Corchado F.F.,National Polytechnic Institute of Mexico | Castillo Toledo B.,National Polytechnic Institute of Mexico | Felix Avina V.G.,Polytechnic University of Sinaloa
IEEE Latin America Transactions | Year: 2015

This research work is about the choice of a coordination mechanism, essentially to allow migration of users and services, among multi-agent systems. Current approaches to coordination multiagent systems have addressed the problem of coordination, but only among the agents in a society of agents, leaving open the question of coordination among societies of agents. The purpose of this research is to propose a Framework for helping to choose a coordination mechanism for the integration of multi-agent systems in an intelligent ecosystem. To show our proposal, we focus our attention in a ecosystem of intelligent environments oriented towards medical monitoring as a use case. © 2003-2012 IEEE. Source


Boggia J.,University of the Republic of Uruguay | Asayama K.,Teikyo University | Li Y.,Shanghai JiaoTong University | Hansen T.W.,Steno Diabetes Center | And 2 more authors.
Current Hypertension Reports | Year: 2014

Variability is a phenomenon attributed to most biological processes and is a particular feature of blood pressure (BP) that concerns many physicians regarding the clinical meaning and the impact on their clinical practice. In this review, we assessed the role of different indices of BP variability in cardiovascular risk stratification. We reviewed the indices of BP variability derived from ambulatory BP monitoring (day-to-night ratio, morning surge of BP, and short-term BP variability) and home BP measurement (standardized conventional BP measurement and self-BP measurement), and summarized our recent results with the intention to provide a clear message for clinical practice. Conclusion: BP variability, either derived from ambulatory BP measurement or home BP measurement does not substantially refine cardiovascular risk prediction over and beyond the BP level. Practitioners should be aware that BP level remains the main modifiable risk factor derived from BP measurement and contributes to improving the control of hypertension and adverse health outcomes. © 2014, Springer Science+Business Media New York. Source


Mejias-Brizuela N.Y.,Polytechnic University of Sinaloa | Olivares-Perez A.,National Institute of Astrophysics, Optics and Electronics
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2016

Experimental technique is described for holographic record in two different hexoses, with a new photosensitizer, the ferric ammonium citrate, and compared to the hexoses-dichromated films. The ferric ammonium citrate is an optimal salt for photosensitization of hexoses because we obtained a diffraction efficiency to first order acceptable for saccharides materials (two and three percent), has ability for to storage information, holographic images are quite stable over time, it is hydrophobic and is cheap. The experiments showed that the films called hexose 1-citrate and hexose 1-dichromate, present the maximum diffraction efficiency at first diffraction order. © 2016 SPIE. Source


Rodriguez-Tirado V.,Polytechnic University of Sinaloa | Green-Ruiz C.,National Autonomous University of Mexico | Gomez-Gil B.,Ac Mazatlan Unit For Aquaculture And Environmental Management Ap
Chemical Engineering Journal | Year: 2012

To determine the effects of pH, salinity and temperature on the Cu and Pb biosorption capacities of the subtropical estuarine bacteria Bacillus thioparans strain U3, batch experiments were performed under a variety of laboratory conditions. Of the eight kinetic models employed, the pseudo-second order (PSO) model provided the best fit for the experimental data for both metals. The optimal conditions for Cu biosorption were at pH 6 and 25°C, while Pb biosorption was maximised at pH 4 and 35°C. Zero salinity was optimal for both metals. The experimental data fit the Langmuir adsorption model well. The maximum Cu and Pb biosorption capacities of B. thioparans U3 suggest that the bacterium can be a suitable biosorbent for these metals. © 2011 Elsevier B.V.. Source

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