Pathogens in animal meal and the use of Salmex (R) in the elimination of Clostridium perfringens

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Rerrefino de óleo lubrificante usado

The lubricant oil used in engines of internal combustion must be, periodically, changed. Its mainly function in the engines is to reduce the friction between the pieces, but its presence also promotes the cleanness and the refrigeration of the equipment. These attributions, at the end of some cycles of operation, make the oil to be dirty, that is, full of contaminating substances such as water, gasoline, diesel, additives, oxidized hydro-carbons and rests of metals, not being recommended, therefore, its discarding in the environment. Thus, all the used lubricant oil that leaves the automobiles engine has been thrust, waiting for a solution. The pollution generated by the discarding of a ton of used oil per day in the soil or in the rivers is equivalent to a domestic sewer of 40 thousand of people. The indiscriminate burning of the used lubricant oil generates significant emissions of metallic oxides, besides other toxic gases, like the dioxin and sulphur oxides. In this context, the mean objective of this essay was to effectuate the rerrefine of the used lubricant oil, aiming the increase of its life cycle and consequently contributing for the reduction of the environmental pollution. According to the used process, it was possible to get a rerrefine oil, of good quality, which physicistchemistries properties are in compliance with the norms of NBR and ASTM

Proposta para melhoria da qualidade dos produtos cerâmicos e de criação de um polo cerâmico artesanal na cidade de Indiana - SP

This work presents a proposal to create a Polo Ceramic Craft in the town of Indiana - SP, through the potter’s organization in a cooperative that will coordinate activities to add value to ceramic pieces. To achieve this, two things are essential: improving the ceramic body and improve the properties of the ceramic material. For the first action it’s necessary to create a Central Mass Production of Ceramics, to provide raw materials and homogeneous composition that results in differentiated ceramic after burning process (sintering). To this end, we propose the incorporation of additives (which act as fluxes) to the clay material. These additives can be mineral such as feldspar and nefelinas or leavings, such as glass powder obtained from disposable containers. For the second action is necessary to acquire an oven, electric or gas, it reaches higher temperatures (around 1200 ° C). The presence of the additive and burning at higher temperatures will enable better production of sintered ceramic material with less porosity and water absorption and higher mechanical strength, and pieces vitrified and glazed, allowing them to assign a higher value. For the production of these materials (thinner walls) requires a smaller volume of clayey raw materials. Besides benefiting the ceramic pieces, the proposed changes reduce the environmental impact caused by burning wood, since it will be replaced by natural gas (or electricity), and even will reduce the disposal of glass containers in the environment by recycling and incorporating this material in the clay. From a social standpoint, the cooperative is crucial to the viability of the proposed project, to coordinate activities and commercial production, which will result in better wages and profits for companies and consequently for the city and its population

Biotratamento de sacolas plásticas de supermercado

Supermarket plastic bags are produced by high density polyethylene (HDPE) and low density polyethylene (LDPE) resins. In Brazil, are produced annually around 150 plastic bags per capita. Disposed in landfills, the supermarket plastic bags prevent the passage of water by slowing the breakdown of biodegradable materials and hindering compaction of waste, according to their low degradability. This work investigated the biodegradation of PE bags containing additive oxo-biodegradable and bags without additives: buried in soil columns, exposed in a controlled environment and exposed to air. The analysis methods used to assess the changes brought in the bags with respect to microbial action and exposure time were weight loss, thickness measurement, infrared (FTIR), scanning electron microscopy (SEM) and contact angle. The results showed that the use of prodegradant agents such as oxobiodegradable additives in polyethylene bags, buried in soil for 270 days, was not efficient to accelerate the biodegradation by microorganisms. It seems that these additives have been more efficient to degrade the colored pigmentation of printed bags, under the influence of light and heat.

As Correntes digitais em perspectiva dialógica

Ce travail est consacré sur la perspective dialogique d'étude d'un type de texte assez bien populaire sur les médias numériques; appelés par chaîne, il s'agit des messages qui sont transmises par e-mail de façon très rapide et de large propagation parmi ses usagers. La recherche a par objective principal analyser les discours véhiculés par les appelés chaînes, en abordant ses thèmes plus recourants, liées aux concepts de dialogue et genre, présents sur les travaux du Circule de Bakhtine. Par constitution du corpus ils sont allés sélectionnées des chaînes transmises par e-mail entre les années de 2009 et 2011. Dans l'analyse du matériel collecté on a découvert des différences plus généralistes que nous ont permis sa organisation en trois différents grands thèmes: religieuse, relations et utilité publique. Les chaînes composées par la thématique religieuse amènent une mode d’interpellation assez très incisif, direct et explicite à son destinataire, pour qu'il puisse renvoyer le message reçu à des autres destinataires. Il s'agit d'un appel, souvent, coactif et menaçant, avec le but aussi de persuader le destinataire à adhérer au discours religieux contenu dans le message. Le discours religieux des chaînes est configuré d'une façon de défi, ou test, pour lesquelles il y a une promesse de récompense. Le deuxième type de chaîne analysé explore le thème des relations homme/femme et interpelle son destinataire d'une façon suggestionné et non coercitive

Revisão sobre fármacos quirais e a sua importância na medicina atual

Aspects are discussed on the chirality of drugs and their action in the human body, the benefits of using a drug in enantiomerically pure form and why, even today, despite the risks, many drugs are marketed as racemic mixture. Among the methods of separation there is the High Performance Liquid Chromatography (HPLC) which can be given in different ways using chiral additives in the mobile phase as in the system of ligand exchange in the ion pair system and the system of cavity or inclusion. Note also the wide variety of chiral stationary phases available in the market that allow high specificity using them according to the need and purpose of the method. The review of the topic is extremely important since it is a matter of public interest world that brings into play issues and financial policies

Estudo de cerâmicas avançadas para fins de blindagem balística

The research involving new materials has always been considered as a differential in the development of a technology company. This occurred naturally since ancient times, often motivated by reasons of a certain age, where the most common material used was also the name of your time and may be cited as an example the Bronze Age, and later was the Iron. Currently, the use of firearms are they used in resolving conflicts between countries, or a more equivocal, as an instrument of social banditry make innovations in the area of shielding welcome, whether for personal use, in the form of vests or vehicle such as cars, tanks and even aircraft. In this context, is a Silicon Carbide Ceramic, with low density and high hardness. Thus, the aim of this study is the evaluation and comparison of these materials, seeking to improve their properties by means of additives such as boron and silicon metal and amorphous YAG. For this work, the specimens were pre-shaped by means of uniaxial later to be referred for isostatic pressing and sintering. The maximum percentage for each additive was 5%, except for the YAG whose percentage was 8.2% (mass percentage). All compositions were subjected to the same tests (x-ray diffraction, apparent density, optical microscopy, Vickers hardness, scanning electron Microscopita), so that one could draw a comparison between the materials under study, samples that showed better mechanical properties and micro structural, related here by hardness testing and microscopy (optical and SEM) were the silicon carbide doped with YAG and alumina samples, demonstrating the potential of these materials for ballistic protection. Other compositions have high porosity, which is highly undesirable, since in order to harmful influences on the mechanical properties discussed below

Propriedades físico-químicas e mecânicas, potencial bioativo e caracterização da interface dentina-cimento de cimentos endodônticos experimentais à base de cimento Portland associados à radiopacificadores micro e nanoparticulados

Pós-graduação em Odontologia - FOAR

Efeito da utilização de substitutos de gordura em queijos light

Cheeses are known to be sources of calcium, phosphorus and protein, important nutrients for a suitable nutrition. However, certain cheeses imply the ingestion of large amounts of fats, which can cause the development of coronary heart and carcinogenic diseases. Although consumers are aware of the necessity of reducing the fats intake, they are still not pleased with the quality of light cheeses available on the market, because the partial or total fat removal provides some undesirable changes, especially regarding to the product texture and flavor. In order to offer products nutritionally adequate and palatable, alternatives have been developed to improve the characteristics of light cheeses. Such alternatives include the use of fat substitutes, those additives that improve the functional and sensory characteristics of cheeses with reduced fat. Fat substitutes composed of proteins, carbohydrates and lipids, or a combination of them, help the retention of moisture and eliminate the undesirable characteristics of fat reduced-cheeses. In this context, this review aims at reporting the innovations and trends on the use of fat substitutes to produce light cheeses.

Caracterização de cerâmicas a base de nitreto de silício para aplicações estruturais

The need for development of new materials is a natural process in the companies’ technological point of view, seeking improvements in materials and processes. Specifically, among the materials, ceramic exhibit valuable properties, especially the covalent ceramics which have excellent properties for applications which requires the abrasion resistance, hardness, high temperatures, resistence, etc. being a material that has applications in several areas. Most studies are related to improvement of properties, specially fracture toughness that allows the expansion of its application. Among the most promising ceramic materials are silicon nitride (Si3N4) which has excellent properties. The goal of this work was the development and caracterization of Si3N4-based ceramics, doped with yttrium oxide (Y2O3), rar earth concentrate (CTR2O3) and cerium oxide (CeO2) in the same proportion for the evaluation of properties. The powders' mixtures were homogenized, dried and compressed under pressure uniaxial and isostatic. Sintering was carried out in 1850 ⁰C under pressure of 0,1MPa N2 for 1 h with a heating rate of 25 ⁰C / min and cooling in the furnace inertia. The characterizations were performed using Archimedes principle to relative density, weight loss by measuring before and after sintering, phase analysis by X-ray diffraction, microstructure by scanning electron microscope (SEM), hardness and fracture toughness by the method Vickers indentation. The results obtained showed relative density of 97-98%, Vickers hardness 17 to 19 GPa, fracture toughness 5.6 to 6.8 MPa.m1/2, with phases varying from α-SiAlON and β-Si3N4 depending the types of additives used. The results are promising for tribological applications and can be defined according to the types of additives to be used

Estabilização de enzimas: uma abordagem

Enzyme stabilization is one critic point in basic and applied enzymology. The increasing interest in applying enzymes in industrial processes has fostered the search for biocatalysts with new properties or extreme stability. Enzyme stabilization can be achieved by different methods: isolating enzyme variants from organisms living in appropriate extreme environments (extremozymes), by protein engineering, chemical modification, use of additives, immobilization. This brief review aims to give a better understanding of those methods employed for enzyme stabilization.

Electrical Properties at Grain Boundaries Influenced by Cr3+ Diffusion in SnO2.ZnO.Nb2O5-Films Varistor Prepared by Electrophoresis Deposition

SnO2-based varistors are strong candidates to replace the ZnO-based varistors due to ordering fewer additives to improve its electrical behavior as well as by showing similar nonlinear characteristics of ZnO varistors. In this work, SnO2-nanoparticles based-varistors with addition of 1.0 %mol of ZnO and 0.05 %mol of Nb2O5 were synthesized by chemical route. SnO2.ZnO.Nb2O5-films with 5 μm of thickness were obtained by electrophoretic deposition (EPD) of the nanoparticles on Si/Pt substrate from alcoholic suspension of SnO2-based powder. The sintering step was carried out in a microwave oven at 1000 °C for 40 minutes. Then, Cr3+ ions were deposited on the films surface by EPD after the sintering step. Each sample was submitted to different thermal treatments to improve the varistor behavior by diffusion of ions in the samples. The films showed a nonlinear coefficient (α) greater than 9, breakdown voltage (VR) around 60 V, low leakage current (IF ≈ 10-6 A), height potential barrier above 0.5 eV and grain boundary resistivity upward of 107 Ω.cm.

Percepção de risco sanitário na bovinocultura de corte no estado de São Paulo

Pós-graduação em Medicina Veterinária - FCAV

Uso de probiótico e óleos essenciais na ração sobre a microbiota intestinal, atividade de enzimas digestivas e a expressão de genes relacionados aos processos de digestão e absorção de nutrientes em frangos

Pós-graduação em Zootecnia - FCAV

Parâmetros genéticos para integridade óssea do fêmur e estudo da associação dos genes runx2 e tnfs11 em frangos de corte

Pós-graduação em Genética e Melhoramento Animal - FCAV