Polytechnic University of Sinaloa

www.upsin.edu.mx
Mazatlan, Mexico

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Boggia J.,University of the Republic of Uruguay | Boggia J.,Hospital Of Clinicas Dr Manuel Quintela | Asayama K.,Teikyo University | Li Y.,Shanghai JiaoTong University | And 3 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.


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 711
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..


PubMed | Coordinacion Of Tecnologia Of Alimentos Of Origen Animal Research Center En Alimentacion sarrollo, Polytechnic University of Sinaloa and Programa Of Investigacion En Biotecnologia Instituto Nacional Of Investigaciones Forestales
Type: | Journal: Applied biochemistry and biotechnology | Year: 2016

Plant proteases are capable of performing several functions in biological systems, and their use is attractive for biotechnological process due to their interesting catalytic properties. Bromelia pinguin (aguama) is a wild abundant natural resource in several regions of Central America and the Caribbean Islands but is underutilized. Their fruits are rich in proteases with properties that are still unknown, but they represent an attractive source of enzymes for biotechnological applications. Thus, the proteolytic activity in enzymatic crude extracts (CEs) from wild B. pinguin fruits was partially characterized. Enzymes in CEs showed high proteolytic activity at acid (pH 2.0-4.0) and neutral alkaline (pH 7.0-9.0) conditions, indicating that different types of active proteases are present. Proteolytic activity inhibition by the use of specific protease inhibitors indicated that aspartic, cysteine, and serine proteases are the main types of proteases present in CEs. Activity at pH 3.0 was stable in a broad range of temperatures (25-50C) and retained its activity in the presence of surfactants (SDS, Tween-80), reducing agents (DTT, 2-mercapoethanol), and organic solvents (methanol, ethanol, acetone, 2-propanol), which suggests that B. pinguin proteases are potential candidates for their application in brewing, detergent, and pharmaceutical industries.


Mena L.J.,Polytechnic University of Sinaloa | Felix V.G.,Polytechnic University of Sinaloa | Ostos R.,Polytechnic University of Sinaloa | Gonzalez J.A.,National Institute of Astrophysics, Optics and Electronics | And 6 more authors.
Computational and Mathematical Methods in Medicine | Year: 2013

The ARVmobile v1.0 is a multiplatform mobile personal health monitor (PHM) application for ambulatory blood pressure (ABP) monitoring that has the potential to aid in the acquisition and analysis of detailed profile of ABP and heart rate (HR), improve the early detection and intervention of hypertension, and detect potential abnormal BP and HR levels for timely medical feedback. The PHM system consisted of ABP sensor to detect BP and HR signals and smartphone as receiver to collect the transmitted digital data and process them to provide immediate personalized information to the user. Android and Blackberry platforms were developed to detect and alert of potential abnormal values, offer friendly graphical user interface for elderly people, and provide feedback to professional healthcare providers via e-mail. ABP data were obtained from twenty-one healthy individuals (>51 years) to test the utility of the PHM application. The ARVmobile v1.0 was able to reliably receive and process the ABP readings from the volunteers. The preliminary results demonstrate that the ARVmobile 1.0 application could be used to perform a detailed profile of ABP and HR in an ordinary daily life environment, bedsides of estimating potential diagnostic thresholds of abnormal BP variability measured as average real variability. © 2013 Luis J. Mena et al.


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


Echeverria C.,University of Toronto | Echeverria C.,University of Los Andes, Venezuela | Echeverria C.,Polytechnic University of Sinaloa | Kapral R.,University of Toronto
Physical Chemistry Chemical Physics | Year: 2015

The dynamics of an elastic network model for the enzyme 4-oxalocrotonate tautomerase is studied in a system crowded by mobile macromolecules, also modeled by elastic networks. The system includes a large number of solvent molecules, as well as substrate and product molecules which undergo catalytic reactions with this hexameric protein. The time evolution of the entire system takes place through a hybrid dynamics that combines molecular dynamics for solute species and multiparticle collision dynamics for the solvent. It is shown that crowding leads to subdiffusive dynamics for the protein, in accord with many studies of diffusion in crowded environments, and increases orientational relaxation times. The enzyme reaction kinetics is also modified by crowding. The effective Michaelis constant decreases with crowding volume fraction, and this decrease is attributed to excluded volume effects, which dominate over effects due to reduced substrate diffusion that would cause the Michaelis constant to increase. This journal is © the Owner Societies.


Nunez J.V.,Polytechnic University of Sinaloa | Briseno A.,Polytechnic University of Sinaloa | Rodriguez D.A.,Polytechnic University of Sinaloa | Ibarra J.M.,CINVESTAV | Rodriguez V.M.,Polytechnic University of Sinaloa
Proceedings - 2012 Brazilian Robotics Symposium and Latin American Robotics Symposium, SBR-LARS 2012 | Year: 2012

The aim of this paper is to explain basic kinematic concepts applied to humanoid robots. The structure of a Bioloid with three degrees of freedom (DoFs) for the arms and six DoFs for the legs is considered. The solution of direct and inverse kinematics (IK) is presented for both arms and legs. Our main contribution is to solve in a detailed manner the legs IK because this is the basis for planning walking motions. © 2012 IEEE.


Zambrano-Zaragoza J.F.,Autonomous University of Nayarit | Romo-Martinez E.J.,Polytechnic University of Sinaloa | Duran-Avelar M.D.J.,Autonomous University of Nayarit | Garcia-Magallanes N.,Polytechnic University of Sinaloa | Vibanco-Perez N.,Autonomous University of Nayarit
International Journal of Inflammation | Year: 2014

The view of CD4 T-cell-mediated immunity as a balance between distinct lineages of Th1 and Th2 cells has changed dramatically. Identification of the IL-17 family of cytokines and of the fact that IL-23 mediates the expansion of IL-17-producing T cells uncovered a new subset of Th cells designated Th17 cells, which have emerged as a third independent T-cell subset that may play an essential role in protection against certain extracellular pathogens. Moreover, Th17 cells have been extensively analyzed because of their strong association with inflammatory disorders and autoimmune diseases. Also, they appear to be critical for controlling these disorders. Similar to Th1 and Th2 cells, Th17 cells require specific cytokines and transcription factors for their differentiation. Th17 cells have been characterized as one of the major pathogenic Th cell populations underlying the development of many autoimmune diseases, and they are enhanced and stabilized by IL-23. The characteristics of Th17 cells, cytokines, and their sources, as well as their role in infectious and autoimmune diseases, are discussed in this review. © 2014 José Francisco Zambrano-Zaragoza et al.


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.


PubMed | Autonomous University of Nayarit and Polytechnic University of Sinaloa
Type: | Journal: International journal of inflammation | Year: 2014

The view of CD4 T-cell-mediated immunity as a balance between distinct lineages of Th1 and Th2 cells has changed dramatically. Identification of the IL-17 family of cytokines and of the fact that IL-23 mediates the expansion of IL-17-producing T cells uncovered a new subset of Th cells designated Th17 cells, which have emerged as a third independent T-cell subset that may play an essential role in protection against certain extracellular pathogens. Moreover, Th17 cells have been extensively analyzed because of their strong association with inflammatory disorders and autoimmune diseases. Also, they appear to be critical for controlling these disorders. Similar to Th1 and Th2 cells, Th17 cells require specific cytokines and transcription factors for their differentiation. Th17 cells have been characterized as one of the major pathogenic Th cell populations underlying the development of many autoimmune diseases, and they are enhanced and stabilized by IL-23. The characteristics of Th17 cells, cytokines, and their sources, as well as their role in infectious and autoimmune diseases, are discussed in this review.

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