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Laminação em atmosfera inerte de ligas à base de magnésio para armazenagem de hidrogênio
(Universidade Federal de São Carlos, 2014-08-08) Lago, Milton Luis do; Ishikawa, Tomaz Toshimi; https://lattes.cnpq.br/5726055117451807; https://lattes.cnpq.br/7895347968659345
In recent decades, the use of energy presented strong growth due to the need of supplying the daily energy consumption of approximately seven billion people. To solve this problem, it has been investigated the nature, alternative energy sources which respect the environmental issues, to provide social and technological development without negative impacts on the environment. Several processing routes have been investigated in recent years in order to overcome the obstacles of storage and availability of hydrogen as a clean, safe, cost effective and of easy manipulation energy source. The solid state reaction of magnesium and hydrogen gas produces the magnesium hydride compound which provides safe manipulation, high volumetric and gravimetric densities when compared to other traditional forms of storage (liquid or gas), coming out to be promising for being used on an industrial scale as energy carrier for mobile application. However, conventional processing routes produce a material which requires the use of high temperatures during cycling, as well as low speed of the kinetics of absorption and desorption of hydrogen gas, which limits its possibility of application. This work aims to improve the properties of magnesium alloys by cold rolling under inert atmosphere. To achieve this goal, it was developed a laminator equipped with speed control of cylinders that has capacity of 1.1 kilowatts, which works inside a glovebox. The equipment allows producing, by severe plastic deformation, voluminous magnesium-bases samples to storage hydrogen gas, under controlled atmosphere in order to avoid the incorporation of gaseous and/or solid impurities usually found on other viii routes of processing. Structural characterization of the processed samples was performed by techniques of analysis of XRD, SEM and TEM. The hydrogen storage properties were evaluated by DSC and measurements of PCT.
Ação do tratamento com Mentha piperita L. e Harpagophytum procumbens contra Schistosoma mansoni - in vitro: análise proteômica
(Universidade Federal de São Carlos, 2014-08-08) Correia, Ricardo de Oliveira; Anibal, Fernanda de Freitas; https://lattes.cnpq.br/4918261968772806; https://lattes.cnpq.br/1683990324591251
Mansonic schistosomiasis is a disease that infected more than 240 million people worldwide, it is caused by Schistosoma mansoni. It is the second only to malaria in public health importance. The only drug currently effective against S. mansoni is Praziquantel (PQZ), however, has been reported strains of S. mansoni with loss of sensitivity. Such reports reinforce the need to develop new safer treatment against S. mansoni. The natural compounds are important to develop new drugs. Mentha piperita L. also known as peppermint, studies reported the treatment as antiparasitic diseases (for example giardiasis). In ours laboratory showed a decrease of inflammatory process of schistosomiasis in a murine model after treatment with ethanolic extract of M. piperita. However don´t know nothing about action of this plant against adult worms of S. mansoni. Harpagophytum procumbens is a plant that has origins in Africa, studies showed promising results antibacterial and against rheumatism diseases, but has no studies against schistosomiasis. In this study we evaluated effect of ethanolic extract of H. procumbens and ethanolic extract of Mentha piperita L. and its fractions against Schistosoma mansoni, its observed for optical microscopic and change in protein expression, after in vitro assay. It was observed that all extract and its fraction caused the motor activity reduction and separation of couple worms. Exceptions of hydroalcoholic fraction of M. piperita, S. mansoni adult worms were death after treatment. We observed that ethanolic extract of H. procumbens showed more promising results when compared with M. piperita. And we observed that ethyl acetate shoed more promising result than ethanolic extract of M. piperita and its other fractions.In this work was observed change in protein expression in 2D gel electrophoresis after all ethanolic extractions and fractions treatment. The proteins in gel electrophoresis have been identified by mass spectrometry. The mass spectrometry assay showed important proteins for S. mansoni homeostasis and possible therapeutic target, for example actin, enolasis, fructose-biphosphate aldolase, and others important proteins. These results indicate that these plants may be anthelmintic activity against S. mansoni. However, it has need for more studies to complete undesiring of these extract against S. mansoni.
Gestão de suprimentos e oportunidades de melhoria: estudo de caso em uma montadora de equipamentos médico-odontológicos
(Universidade Federal de São Carlos, 2014-08-08) Baptista, Sergio Alexandre; Alves Filho, Alceu Gomes; https://lattes.cnpq.br/7885557554922569; https://lattes.cnpq.br/7205530534286356
The importance of supply management for the medical-dental equipaments assemblers due to its contribution to the success of their business strategies, since more efficient delivery operations ensure the profitability of these companies. Such operations are based on the supply of parts and components with the desired quality in the required quantity, on schedule and at competitive costs. This paper analyzes the supply management of a medical-dental equipaments assembler, aiming to propose improvements in the practices currently adopted and thereby increase the performance of this important role at the company studied. To fulfill this objective, first developed a theoretical framework in order to develop a thorough knowledge of the subject, studied the industry and also to establish a conceptual framework focused on field research. Was then carried out a case study in the exploratory character of the analyzed company. The description of the results involved a comparison of the practices adopted in the enterprise with the theory of supply management, allowing the proposition of improvements, as gaps, which should provide the elevation of performing this important function in the company studied were found.