Zooming to the study area in GIScience research: a three stage approach

6-8 Apri

The Charm of the Proton and the Λc+\Lambda _c^{+} Production

We propose a two component model for charmed baryon production in $pp$ collisions consisting of the conventional parton fusion mechanism and fragmentation plus quarks recombination in which a $ud$ valence diquark from the proton recombines with a $c$-sea quark to produce a $\Lambda_c^+$. Our two-component model is compared with the intrinsic charm two-component model and experimental data.Comment: 6 pages, LaTex, 2 figures included, aipproc.sty included. Talk presented at Simposio Latino Americano de Fisica de Altas Energias, Merida, Mexico, November 199

The Λ0\Lambda_0 Polarization and the Recombination Mechanism

We use the recombination and the Thomas Precession Model to obtain a prediction for the $\Lambda _0$ polarization in the $p+p \to \Lambda_0+X$ reaction. We study the effect of the recombination function on the $\Lambda_0$ polarization.Comment: 4 pages, LaTex, 1 figures included, aipproc.sty included. Talk presented at Simposio Latino Americano de Fisica de Altas Energias, Merida, Mexico, November 199

Solubility of salts in mixed solvents: experimental data and modeling

Phase equilibria in electrolyte systems has been receiving much attention from different research groups. Much of the experimental and theoretical work has been carried out on aqueous systems or in the study of salt effect in vapor-liquid equilibria. However, the design and simulation of unit operations such as, The recently developed extractive crystallization, requires experimental solubility data as well as The ability to correlate and predict electrolyte activity coefficients in mixed-solvents. Moreover, this kind of data can give many relevant indications about ion-solvent interactions and allows the calculation of other thermodynamic properties. Thus, in this work, the solubilities of the salts NaBr and KBr were measured, by an analytical isothermal method, in water, methanol, ethanol and their binary mixed-solvent mixtures, water/methanol, water/ethanol and methanol/ethanol, at temperatures from ambient up to 80 O( The obtained data, were used, together with osmotic and mean ionic molal activity coefficients data available in the literature, to test the capabilities of UNIQUAC-based models for the representation of the thermodynamics properties of these systems. Results are shown and comparisons with other approaches are given

Inteligência emocional ─ Ferramenta essencial para uma vida positiva

Este artículo presenta el papel de la inteligencia emocional y el impacto positivo que puede tener en la vida de un ser humano. A principios de la década de 1990, Salovey y Mayer (1990) publicaron un artículo que resultaría de una serie de estudios sobre la inteligencia y el papel de las emociones en el desarrollo del hombre. Sugirieron así, que había una habilidad cognitiva que hasta ahora no había sido clasificada. Esta competencia se denomina inteligencia emocional, a partir de ese momento suscita un profundo interés en muchos investigadores de todo el mundo. Goleman (1996) llama la atención al mundo para un tema ya profundizado por varios autores, haciendo hincapié en la distinta concepción de la inteligencia tradicional. Da a conocer el éxito que el papel de la inteligencia emocional y las emociones podrían tener en el desarrollo profesional, psicológico y social de cada individuo. La inteligencia emocional permite al hombre tomar conciencia de sus emociones, comprender sus sentimientos, tanto como los de los demás. Es una habilidad que poseemos para poder relacionarnos con los demás y comunicarnos de forma asertiva, que va a permitir proyectar una actitud optimista ante la vida. Relacionado con un fuerte aliado inteligencia emocional y las emociones, pueden proporcionar niveles de bienestar psicológico y físico no descubiertos hasta entonces. Participando y aplicando una psicología positiva en su vida, el hombre puede cubrir campos de estabilidad nunca antes alcanzado. La inteligencia emocional es un arte que requiere un aprendizaje simple y consciente de un valor incalculable.This paper presents the role of Emotional Intelligence and the positive impact it can have on human life. In the early 1990s, Salovey and Mayer (1990) published an article that would result from several studies on the intelligence and the role of emotions in human development. Have suggested that there was a cognitive ability that until now had not been classified. Those powers it is known as Emotional Intelligence, from that moment raises a deep interest in many researchers around the world. Goleman (1996) draws attention to the world for a theme already in detail by other authors, the distinct conception of traditional intelligence. Making known the development that the role of emotional intelligence and their emotions could have on professional success, psychological and social development of each individual. The Emotional Intelligence enables man to become aware of their emotions, understand the feelings, as much as their others. It’s a skill that we possess in order to relate to others and communicate in an assertive manner, which will allow project an optimistic attitude towards life. Linked to a strong ally emotional intelligence and emotions, can provide levels of psychological well-being and physical not covered before. Joining and applying a positive psychology in your life, man can cover fields of stability never before achieved. Emotional intelligence is an art that requires a simple learning and conscious invaluable.O presente trabalho visa apresentar o papel da Inteligência Emocional e as repercussões positivas que pode ter na vida do ser Humano. No início da década de 1990, Salovey e Mayer (1990) publicaram um artigo que resultaria de vários estudos sobre a inteligência e o papel das emoções no desenvolvimento do Homem. Sugeriram assim, que existia uma competência cognitiva que até ao momento não tinha sido classificada. Tal competência recebe a designação de Inteligência Emocional, desde esse momento suscita um profundo interesse em vários pesquisadores por todo o mundo. Goleman (1996) chama a atenção ao mundo para um tema já aprofundado por vários autores, vincando a concepção distinta da Inteligência tradicional. Dando a conhecer o sucesso que o papel da Inteligência Emocional e Emoções poderiam ter no desenvolvimento profissional, psicológico e social de cada individuo. A Inteligência Emocional permite ao ser humano tomar consciência das suas emoções, compreender os sentimentos, tanto como as dos seus demais. É a uma aptidão que possuímos, de forma a relacionar com os outros e comunicar de forma assertiva, que vai permitir projectar uma atitude optimista perante a vida. A inteligência Emocional é uma arte que pressupõe uma aprendizagem simples e consciente de valor incalculável

The effect of the alcohol content on the solubility of amino acids in aqueous solutions

The solubility of me most simple a-amino acid, glycine, was measured in the temperature range between 25 and 60°C for the aqueous system of ethanol and at 25 °C for the aqueous system 0V 1-propanol. Theoretical work was essentially focused on the application of the excess solubility approach with conventional thermodynamic models such as the Margules and Wilson equations. The simple three suffix Margules model, with only one parameter to be estimated, gave the best results, with an average absolute deviation of 3.8%

Solubility of amino acids in mixed solvent systems

The solubilities of L-serine, L-threonine and L-isoleucine in the aqueous systems of ethanol, 1-propanol and 2-propanol were measured in the temperature range between 298.15 K and 333.15 K by means of a gravimetric method and a spectrophotometric technique based on a ninhydrin reaction. The solubility data from this work and from literature were used to explore the potentialities of the application of the excess solubility approach with the NRTL [1], modified NRTL [2], modified UNIQUAC [3, 4] equations and the model presented by Gude et al. (1996) [5, 6]. These four models give a global average relative deviation of 12.2 %, 12.0 %, 15.1 %, and 16.2 % for correlation and 16.3 %, 14.6 %, 27.3 %, and 22.0 % for prediction, respectively

Electrolyte effect on the solubility of amino acids in aqueous solutions

The precipitation and crystallization of biomolecules have been widely used for their separation and concentration. The presence of electrolytes in solution may affect significantly the solubilities of biochemicals, which has been used for salt-induced separation of proteins. Although amino acids are among the simplest biochemicals, they have many similarities with more complex biochemicals and are the building block of proteins. So, the study of the electrolyte effect In the solubility of amino acids in water is a good starting point for further developments. Although some studies have been published concerning the measurement and thermodynamic properties modeling of aqueous solutions of amino acids with electrolytes, the information available is very scarce. Therefore, in this work, the solubility of Glycine and OL-Alanine were measured in the temperature range between 25 and 60 °C for aqueous systems of KCI, Na2SO4 and (NH4)2S04, salts most often used in industrial separation processes. A comparison is given with values recently published in the literatures. It was possible to find out big discrepancies, and for the solubility of OL-Alanine in aqueous solutions an inverse dependence with the concentration of the KCI salt was obtained, The new experimental data were used together with information already available concerning the activity coefficients and solubilities, to explore the capabilities of a modified Wilson model, recently developed in our group, for the thermodynamic description of these complex systems. Despite the difficulties that arose for the description of these highly non-ideal systems, the results shown are satisfactory for the correlation of the solubilities