Application of Natural Zeolite as Catalyst in the Degradation of the Azo Dye DO39 by Plasma.

The discharge of industrial wastewater with dyes into natural tributaries has serious environmental consequences on aquatic ecosystems and the health of living beings. Atmospheric plasmas have proven to be very useful for the degradation of organic contaminants in water; in this context, corona type discharge, owing to its physical characteristics, is capable of degrading and even mineralizing dyes dissolved in water. In this work, zeolite was used as a catalyst in the degradation of the textile azo dye Direct Orange 39 (DO39) through interaction with plasma generated at atmospheric pressure.

Physical-Chemical Assessment of Azo Dye Basic Violet I (BVI) Discoloration Using the Corona Plasma in Batch and Flow Systems.

The decolorization of the Basic violet I (BVI) dye when interacted with a corona discharge is studied in the present work, taking in account two systems, batch and flux. The current and voltage were measured during the whole process in which a corona plasma was generated, with an applied power of 51.9 and 167.

Gentamicin Release Study in Uniaxial and Coaxial Polyhydroxybutyrate-Polyethylene Glycol-Gentamicin Microfibers Treated with Atmospheric Plasma.

The skin is the largest organ and one of the most important in the human body, and is constantly exposed to pathogenic microorganisms that cause infections; then, pharmacological administration is required. One of the basic medical methods for treating chronic wounds is to use topical dressings with characteristics that promote wound healing. Fiber-based dressings mimic the local dermal extracellular matrix (ECM), maintaining an ideal wound-healing climate.

Degradation of Acid Red 1 Catalyzed by Peroxidase Activity of Iron Oxide Nanoparticles and Detected by SERS.

Magnetic iron oxide nanoparticles (MIONPs) were synthesized using tannic acid and characterized by Raman, FTIR, UV, and DRX spectroscopy. In a heterogeneous Fenton-like reaction, the catalytic peroxidase-like activity of MIONPs in the degradation of Acid Red 1 (AR 1) dye was investigated. TEM/STEM was used to determine the quasi-spherical morphology and particle size (3.

Chemical elemental analysis of single acoustic-levitated water droplets by laser-induced breakdown spectroscopy.

Laser-induced breakdown spectroscopy is presented for trace element detection of liquid samples by analyzing a single droplet levitated by ultrasonic waves. A single liquid droplet is placed in the node of a standing acoustic wave produced by a uniaxial levitator for further chemical analysis. The acoustic levitator consists of a commercial Langevin-type transducer, attached to a concave mechanical amplifier, and a concave reflector.

Enhanced self-mixing interferometry based on volume Bragg gratings and laser diodes emitting at 405-nm wavelengths.

Self-mixing interferometry (SMI) represents a robust, self-aligned technique for metrology applications. Recently, it has been shown that the detection of the frequency-modulated (FM) signal enhances the conventional SMI signal based on the amplitude modulation. Here, an all-optical, simple and effective alternative approach to detect the FM self-mixing signal is presented.

[Flexible endoscopic treatment for Zenker's diverticulum: preliminary results in a single center experience in a public hospital in Argentina.].

Unlabelled: Zenker's diverticulum (ZD) is an acquired protrusion of the esophageal wall. Treatment is reservedfor symptomatic cases. In Argentina, ZD has historically managed exclusively by surgical intervention.

A novel application of direct force control to perform in-vitro biomechanical tests using robotic technology.

This paper presents a novel application of direct force control to test biological specimens using a serial manipulator with 6 degrees of freedom Direct force control compares actual force/moment values with desired values of load. The error is compensated by a proportional/integral controller (PI), a damping factor implemented with the velocity of the robot and acting in the direction of the force and a feedforward compensation. The controller works with a frequency of 0.

[N-butyl-2-cyanoacrylate for the treatment of gastric varices].

Objective: To evaluate the success of the treatment with cyanoacrylate in primary hemostasis, rebleeding, and gastric varices eradication.

Material And Methods: In this retrospective study 65 patients with gastric varices treated with N-butyl-2-cyanoacrylate (Histoacryl) were included from January 1999 to January 2008. We used a solution of 0,5 mL of cyanoacrylate and 0.

Spatial epidemiology of bovine tuberculosis in Mexico.

The purpose of this study was to use geographic information systems (GIS) and geo-statistical methods of ordinary kriging to predict the prevalence and distribution of bovine tuberculosis (TB) in Jalisco, Mexico. A random sample of 2 287 herds selected from a set of 48 766 was used for the analysis. Spatial location of herds was obtained by either a personal global positioning system (GPS), a database from the Instituto Nacional de Estadìstica Geografìa e Informàtica (INEGI) or Google Earth.