Expressão de microRNAs cardíacos induzida por treinamento físico durante insuficiência cardíaca

Pós-graduação em Biologia Geral e Aplicada - IBB

Processo de destilação para redução de contaminação por carbamato de etila em bebidas alcoólicas

Contamination of Brazilian sugar-cane rum by ethyl carbamate, a potentially carcinogenic substance, is considered an obstacle to export of the beverage. Copper is involved in ethyl-carbamate-formation reactions, and the replacement thereof by stainless steel in distillation equipment, with the aim of preventing the formation of said compound, results in a beverage of poor sensory quality owing to the presence of dimethyl sulphide. A reduction in the concentration of sulphurated compounds in the final product may be achieved by the placing of a copper device (Patent No. 8206688) inside the dome of a stainless-steel alembic. It is therefore appropriate to verify the efficiency of using other forms of catalysts that, in addition to reducing ethyl-carbamate levels, are able, likewise, to trigger other catalytic actions that allow the production of a distillate of good sensory quality. Silver is the noble metal most used in industry and, on account of the catalytic properties thereof, it is ideal for use as a catalyst in oxidation reactions. The subject matter of the present invention comprises a method involving the use of silver in the distillation of alcoholic beverages, such as sugar-cane rum, which reduces ethyl-carbamate contamination of the end-product.

Efeito dos óleos essenciais de Syzygium aromaticum e Cinnamomum zeylanicume e seus compostos majoritários na produçao de biofilme em cepas de Staphylococcus aureus, isolados de leite de vacas com mastite subclínica

Pós-graduação em Biologia Geral e Aplicada - IBB

Avanços no torneamento utilizando um porta-ferramentas refrigerado internamente com fluido em mudança de fase

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

Aplicação de corretivos de acidez do solo na implantação do sistema plantio direto

Pós-graduação em Agronomia (Agricultura) - FCA

Desenvolvimento de um biorreator rotativo para produção de enzimas celulolíticas por fermentação em estado sólido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização de filmes finos polimerizados por plasma a partir dos monômeros hexametildisilazano e acetileno e posteriormente expostos à descarga por barreira dielétrica

Pós-graduação em Engenharia Mecânica - FEG

Cinta de náilon como cerclagem óssea - estudo experimental em coelhos e ratos

The aim of this study was to evaluate the biocampatibility of the commercial nylon band used as bone cerclage, comparing with traditional metal cerclage wires. Twenty one rabbits and fifteen rats, healthy and without orthopedics problems were used. A commercial nylon band and a surgical stainless steel wire 0 were used in right (SN) and left (SA) rabbits's hindlimb, respectively. Otherwise, on rats SN was on the left hindlimb, and SA on the right hindlimb. Both experimental species were divided into three groups according to the end of the evaluation period. Clinical, radiographic, macroscopic and histologically evaluation were performed at 30, 60 and 150 days postoperatively. All the animals showed normal limb function differences between groups were not observed at clinical and macroscopic evaluation. On both species, radiographic changes were slightly higher on SN. Histological differences were not observed in both species. Nylon bands do not cause foreign body reaction and other histological changes in rabbits and rats.

Influence of Implant Drill Materials on Wear, Deformation, and Roughness After Repeated Drilling and Sterilization

Purpose:The aim of this study was to evaluate deformation, roughness, and mass loss of stainless steel, diamond-like carbon (DLC)-coated and zirconia drills after multiple osteotomies with sterilization procedures.Materials and Methods:Drilling procedures were performed using stainless steel (G1), DLC-coated (G2), and zirconia (G3) drills. All groups were divided in subgroups 1, 2, 3, 4, and 5, corresponded to drills used 0, 10, 20, 30, and 40 times, respectively.Results:No significant differences in mass and roughness were detected among all groups and subgroups. In SEM images, all groups revealed signs of wear while coating delamination was detected in G2. Drills from G1 displayed more irregular surface, whereas cutting edges were more regular in G3.Conclusion:Zirconia drills presented more regular surfaces whereas stainless steel drills revealed more severe signs of wear. Further studies must be performed to evaluate the putative influence of these findings in heat generation.

Cardiovascular responses to injections of angiotensin II or carbachol into the rostral ventrolateral medulla in rats with AV3V lesions

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

LESION OF THE COMMISSURAL NUCLEUS OF THE SOLITARY TRACT/A2 NORADRENERGIC NEURONS FACILITATES THE ACTIVATION OF ANGIOTENSINERGIC MECHANISMS IN RESPONSE TO HEMORRHAGE

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Ability of Salmonella spp. to Produce Biofilm Is Dependent on Temperature and Surface Material

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

Electrical and Superconducting Properties in Lap Joints for YBCO Tapes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Application of pulsed Nd:YAG laser in thin foil microwelding

Experimental investigations were carried out using a Nd:YAG laser operating in pulsed mode for welding a lap joint between thin foil and thick sheet. The pulse energy was varied from 1.5 to 3.0 J at increments of 0.25 J with a 4 ms pulse duration. The base material used for this study was AISI 316L foils with 100 mu m thickness and sheet with 3.0 mm thickness. The welds were analysed by optical and electronic microscopy, tensile shear tests and micro hardness. The results indicate that pulse energy control is of considerable importance to join thin foil and thick sheet with good quality. The ultimate tensile strength of the welded joints increased at first and then decreased as the pulse energy increased. The process appeared to be very sensitive to the gap between couples. Large voids delimited by the molten zone boundary were observed in joints welded with high pulse energy.

Effects of laser beam energy on the pulsed Nd:YAG laser welding of thin sheet corrosion resistant materials

The aim of this study was to value the possibility to join, for pulsed Nd:YAG laser welding, thin foils lap joints for sealing components in corrosive environment. Experimental investigations were carried out using a pulsed neodymium: yttrium aluminum garnet laser weld to examine the influence of the pulse energy in the characteristics of the weld fillet. The pulse energy was varied from 1.0 to 2.5 J at increments of 0.25 J with a 4 ms pulse duration. The base materials used for this study were AISI 316L stainless steel and Ni-based alloys foils with 100 mu m thickness. The welds were analyzed by electronic and optical microscopy, tensile shear tests and micro hardness. The results indicate that pulse energy control is of considerable importance to thin foil weld quality because it can generate good mechanical properties and reduce discontinuities in weld joints. The ultimate tensile strength of the welded joints increased at first and then decreased as the pulse energy increased. In all the specimens, fracture occurred in the top foil heat-affected zone next to the fusion line. The microhardness was almost uniform across the parent metal, HAZ and weld metal. A slight increase in the fusion zone and heat-affected zone compared to those measured in the base metal was observed. This is related to the microstructural refinement in the fusion zone, induced by rapid cooling of the laser welding. The process appeared to be very sensitive to the gap between couples.