Discovery of Main-Belt Comet P/2006 VW139 by Pan-STARRS 1

The main-belt asteroid (300163) 2006 VW139 (later designated P/2006 VW139) was discovered to exhibit comet-like activity by the Pan-STARRS1 (PS1) survey telescope using automated point-spread-function analyses performed by PS1's Moving Object Processing System. Deep follow-up observations show both a short (~10'') antisolar dust tail and a longer (~60'') dust trail aligned with the object's orbit plane, similar to the morphology observed for another main-belt comet (MBC), P/2010 R2 (La Sagra), and other well-established comets, implying the action of a long-lived, sublimation-driven emission event. Photometry showing the brightness of the near-nucleus coma remaining constant over ~30 days provides further evidence for this object's cometary nature, suggesting it is in fact an MBC, and not a disrupted asteroid. A spectroscopic search for CN emission was unsuccessful, though we find an upper limit CN production rate of Q CN 100 Myr, while a search for a potential asteroid family around the object reveals a cluster of 24 asteroids within a cutoff distance of 68 m s-1. At 70 m s-1, this cluster merges with the Themis family, suggesting that it could be similar to the Beagle family to which another MBC, 133P/Elst-Pizarro, belongs.

Study of aflatoxin exposure in a Brazilian population using an aflatoxin - albumin biomarker

The evaluation of exposure to aflatoxins (AF) by measurement of the level of contamination in food is hampered due to the heterogeneous distribution of AF in food. Therefore, an alternative is to estimate the exposure using specific biological markers (biomarkers) based on an understanding of the metabolism of the compound. For AF, these include aflatoxin-N-7-guanine in the urine, or AFB(1)-albumin (AF-alb) in the blood. This study assessed the level of exposure to AF in Brazilian individuals using a biomarker approach, i.e. the AF-alb adducts. Blood samples were collected from urban residents (n=50; aged 18-52) in June 1999, at the Blood Center of Antonio Carlos de Camargo Hospital, Sao Paulo, Brazil. AF-alb adduct levels were determined, by ELISA following serum albumin extraction and digestion. AF-alb adducts were detected in 31/50 (62%) samples [range 0-57.3 pg AFB(1)-lys adducts/mg of blood albumin (pg/mg)]. The mean level of positives was 14.9 pg/mg and males had the two highest levels measured (57.1 and 57.3 pg/mg). There was no correlation with age or profession. This is the first study of Brazilian, or indeed South American, individuals that has determined exposure to AF at the individual level using a biomarker approach. These levels are similar to those observed in the Philippines. These data warrant further investigation of both the sources and consequences of exposure to this potent toxin in Brazil.

Search for the Return of Activity in Active Asteroid 176P/LINEAR

We present the results of a search for the reactivation of active asteroid 176P/LINEAR during its 2011 perihelion passage using deep optical observations obtained before, during, and after that perihelion passage. Deep composite images of 176P constructed from data obtained between 2011 June and 2011 December show no visible signs of activity, while photometric measurements of the object during this period also show no significant brightness enhancements similar to that observed for 176P between 2005 November and 2005 December when it was previously observed to be active. An azimuthal search for dust emission likewise reveals no evidence for directed emission (i.e., a tail, as was previously observed for 176P), while a one-dimensional surface brightness profile analysis shows no indication of a spherically symmetric coma at any time in 2011. We conclude that 176P did not in fact exhibit activity in 2011, at least not on the level on which it exhibited activity in 2005, and suggest that this could be due to the devolatization or mantling of the active site responsible for its activity in 2005.

Discovery of Main-Belt Comet P/2006 VW139 by Pan-STARRS1

We describe the discovery of comet-like activity in main-belt asteroid (300163) 2006 VW139 (later re-designated as Comet P/2006 VW139) by Pan-STARRS1. We also detail follow-up photometric, spectroscopic, and dynamical analyses of the object.

Simultaneous biosorption of methylene blue and trivalent chromium onto olive stone

In this work, olive stone (OS) was utilized to investigate its capacity as biosorbent for methylene blue (MB) and Cr(III), which are usually present in textile industry effluents. Equilibrium and kinetic experiments were performed in batch experiments. The biosorption process followed pseudo-second-order kinetics. The equilibrium data were fitted with several models, but Langmuir and Sips models best reproduced the experimental results. Maximum biosorption capacities were 3.296 mg/g (0.0116 mmol/g) and 4.990 mg/g (0.0960 mmol/g) for MB and Cr(III), respectively. Several operation variables, such as
biosorbent mass, flow rate, and initial concentration on the removal of dye and metal, were evaluated in column system. The removal efficiency improved as OS mass increased and decreased when flow rate and initial concentration increased. Also, MB uptake was substantially decreased by increasing the initial concentration of Cr(III), ranging from 6.09 to 2.75 mg/g. These results show that the presence of Cr(III) significantly modifies the biosorption capacity of MB by the OS. These results suggest that OS is a potential low-cost food industry waste for textile industry wastewater treatment.

Estudio de factibilidad para la creación de una Empresa dedicada a la elaboración y comercialización de uvillas deshidratadas para el mercado nacional

Esta empresa se orienta a elaboración y comercialización de uvillas deshidratadas, dirigido al mercado Nacional, la razón de ser de esta empresa, es ofrecer un producto que mantenga las características de la fruta, en este caso las uvillas, intactos, lo cual constituye el éxito de nuestra empresa. Además se busca brindar una alternativa diferente al consumidor para que pueda elegir, esto se obtendrá sujetándose al estudio de mercado el cual dará pautas sobre las que la empresa va a desarrollarse. Con este estudio se pretende demostrar que la elaboración y comercialización de la uvilla deshidratada es una oportunidad para emprender en un nuevo negocio, el cual ayudar al crecimiento económico en el país.

Creación de la Microempresa Procesadora de Flores inmortalizadas en la Parroquia el Quinche y su comercialización en la zona norte de Quito

El Ecuador es un país privilegiado que ocupa uno de los primeros lugares en el mundo por la calidad y la gran variedad de sus flores, la utilización de mano de obra calificada y la habilidad de manejar costos de producción más bajos que los de la competencia. La producción florícola en el Ecuador es la actividad exportable que mayor dinamismo y repunte ha alcanzado en los últimos 10 años, en virtud de los factores favorables ya mencionados que han permitido su desarrollo en un medio competitivo. Los empresarios deben reforzar sus factores para de esta forma enfrentar con éxito el creciente comercio internacional de estos productos. La situación actual, estructura e importancia de este sector dentro de la economía nacional, los mercados de destino y los potenciales para la comercialización contribuyen al mantenimiento y consolidación de la ventaja competitiva en la producción de flores.

On development of fractional calculus during the last fifty years

Fractional calculus generalizes integer order derivatives and integrals. During the last half century a considerable progress took place in this scientific area. This paper addresses the evolution and establishes an assertive measure of the research development.

SDAR: a package for plotting and analyzing stratigraphy data in R

Stratigraphic Columns (SC) are the most useful and common ways to represent the eld descriptions (e.g., grain size, thickness of rock packages, and fossil and lithological components) of rock sequences and well logs. In these representations the width of SC vary according to the grain size (i.e., the wider the strata, the coarser the rocks (Miall 1990; Tucker 2011)), and the thickness of each layer is represented at the vertical axis of the diagram. Typically these representations are drawn 'manually' using vector graphic editors (e.g., Adobe Illustrator®, CorelDRAW®, Inskape). Nowadays there are various software which automatically plot SCs, but there are not versatile open-source tools and it is very di cult to both store and analyse stratigraphic information. This document presents Stratigraphic Data Analysis in R (SDAR), an analytical package1 designed for both plotting and facilitate the analysis of Stratigraphic Data in R (R Core Team 2014). SDAR, uses simple stratigraphic data and takes advantage of the exible plotting tools available in R to produce detailed SCs. The main bene ts of SDAR are: (i) used to generate accurate and complete SC plot including multiple features (e.g., sedimentary structures, samples, fossil content, color, structural data, contacts between beds), (ii) developed in a free software environment for statistical computing and graphics, (iii) run on a wide variety of platforms (i.e., UNIX, Windows, and MacOS), (iv) both plotting and analysing functions can be executed directly on R's command-line interface (CLI), consequently this feature enables users to integrate SDAR's functions with several others add-on packages available for R from The Comprehensive R Archive Network (CRAN).

Biología y Pesquería de Ethmidium maculatum “machete” procedente de la pesca artesanal en la Región La Libertad durante el 2010

Se determinaron las características de la Biología y Pesquería de Ethmidium maculatum “machete” procedente de la pesca artesanal en la Región La Libertad durante el 2010. Se trabajó con una base de datos de 1 508 individuos, obtenidos al azar de los desembarques artesanales de Caleta Puerto Morín, Puerto Salaverry, Caleta Huanchaco, Puerto Malabrigo y Puerto Pacasmayo. Para el análisis biológico se consideraron 10 ejemplares máximo por rango de talla. Para determinar el alimento y hábitos alimentarios se realizaron análisis de estimación porcentual y frecuencia de ocurrencia; para determinar las características reproductivas, se analizaron los estadios de madurez gonadal e índice gonadosomático; se determinó el grado de bienestar mediante el factor de condición de Fulton; las constantes de crecimiento fueron calculadas mediante el uso del software FISAT II. La talla media de captura fue inferior a la talla mínima legal establecida. Se tipificó a la especie en estudio como zooplanctonófaga. La proporción sexual fue favorable a las hembras; predominó el estadio desovante y la especie evidenció actividad reproductiva con mayor intensidad a fines de invierno. El crecimiento para hembras y machos fue alométrico. Se reportó un volumen de desembarque de 26 779 kg, y las principales zonas de pesca fueron: Chao, El Carmelo, Buenos Aires, Las Delicias, Salaverry, Los Brujos y Huanchaco.

Factores de riesgo y etapas de adquisición del hábito de consumo de alcohol y tabaco en escolares

Tesis (Maestría en Ciencias de Enfermería con Enfasis en Salud Comunitaria) UANL

Factores de riesgo y etapas de adquisición de consumo de drogas en menores de edad

Tesis (Maestría en Ciencias de Enfermería con Enfasis en Salud Comunitaria) UANL

Frecuencia de los polimorfismos G-308A y G-238A del gen TNF-a en pacientes con esteatohepatitis no alcohólica (NASH) asociada a obesidad

Tesis (Maestría en Ciencias con Especialidad en Biología Molecular e Ingeniería Genética) UANL

Formación de actitudes de los trabajadores hacia la productividad en una empresa de servicio SIOSA

Tesis ( Maestría en Formación y Capacitación de Recursos Humanos ) U.A.N.L.

Clonación y expresión de una proteína recombinante del Gen M del virus del Dengue Serotipo 2.

Tesis (Maestro en Ciencias con Acentuación en Inmunolobiología) UANL, 2011.