STM probing of local oscillations of the Fano-Kondo effect: a Doniach-Sunjic approach for the Kondo peak

The use of the scanning tunneling microscope (STM) for the investigation of Kondo adatoms on normal metallic surfaces reveals a Fano-Kondo behavior of the conductance as a function of the tip bias. In this work, the Doniach-Sunjic expression is used to describe the Kondo peak and we analyze the effect of a complex Fano phase, arising from an external magnetic field, on the conductance pattern. It is demonstrated that such phase generates local oscillations of the Fano-Kondo line shape and can lead to the suppression of anti-resonances.CNPqFAPESPIBEM Brazilian agencie

Organizational climate assessment using the paraconsistent decision method

The present study aims to show a model of organisational climate assessment through the integration of success codes and the Paraconsistent Decision Method. In this way, contributing to a previous scenario analysis that can return a more precise feedback of the organisational culture conditions of the organisation.(3ortugal

Evaluation of Osteoconductive and Osteogenic Potential of a Dentin-Based Bone Substitute Using a Calvarial Defect Model

The aim of this study was to assess the osteoconductive and osteogenic properties of processed bovine dentin using a robust rabbit calvarial defect model. In total, 16 New Zealand White rabbits were operated to create three circular defects in the calvaria. One defect was left unfilled, one filled with collected autogenous bone, and the third defect was filled with the dentin-based bone substitute. Following surgery and after a healing period of either 1 or 6 weeks, a CT scan was obtained. Following sacrificing, the tissues were processed for histological examination. The CT data showed the density in the area grafted with the dentin-based material was higher than the surrounding bone and the areas grafted with autologous bone after 1 week and 6 weeks of healing. The area left unfilled remained an empty defect after 1 week and 6 weeks. Histological examination of the defects filled with the dentin product after 6 weeks showed soft tissue encapsulation around the dentin particles. It can be concluded that the rabbit calvarial model used in this study is a robust model for the assessment of bone materials. Bovine dentin is a biostable material; however, it may not be suitable for repairing large 4-wall defects

Net cage tambaqui farming: microbiological quality, nutritional value and yield.

Tambaqui is traditionally consumed at a commercial size of 1.0 to 3.0 kg However, it is also consumed at between 0.350 to 0.450 kg, this size being referred to as tambaqui curumim (C). The objective of this study was to evaluate the microbiological quality of tambaqui at the commercial size (CS) and to characterize the nutritional value and yield of tambaqui belonging to the two size classes Curumim and CS originating from net cages. The effect of size on the centesimal composition and fish yield was evaluated in a completely randomized design with 12 repetitions while for the microbiological analysis one fish from each net cage was used. C showed protein, ash and moisture contents above those of CS, whereas the ether extract was higher for CS. The yields were 70.04% for C and 65.55% for CS. 50% of the samples showed contamination by Staphylococcus aureus, all values being within the Brazilian?s regulation limits. Salmonella spp. was found in 91.67% of the samples while 75% showed contamination by total coliforms and 8.34% by Escherichia coli. C showed a suitable nutritional value and a better yield in relation to CS. The addition of C to the diet will depend on its acceptance in the markets where its commercialization is not yet established. The microbiological results suggest a tendency of the species to harbor Salmonella spp. on the body surface

Reinforced and prestressed concrete hollow beams under torsion

Recently a new rational theoretical model for beams under torsion has been proposed. This model, called Softened Membrane Model for Torsion (SMMT), is able to predict well the global behaviour of reinforced and prestressed concrete solid beams under torsion. This paper presents a study in order to check the SMMT for reinforced and prestressed concrete hollow beams under torsion. Theoretical predictions from SMMT are compared to some experimental results of hollow beams available in the literature and also with the predictions of another theoretical model previously proposed from the authors. It is shown that SMMT, with some corrections, is able to predict satisfactorily the overall behaviour of reinforced and prestressed concrete hollow beams under torsion

Rapid determination of flavonoids and phenolic acids in grape juices and wines by RP-HPLC/DAD: Method validation and characterization of commercial products of the new Brazilian varieties of grape.

A method for rapid determination of phenolic compounds by reversed-phase high-performance liquid chromatography (RP-HPLC), using a new column of faster resolution was validated and used to characterize commercial products produced with new grape Brazilian varieties of Northeast of Brazil. The in vitro antioxidant activity was also measured. The method showed linearity (R > 0.9995), good precision (CV% < 2.78), recovery (91.8?105.1%) and limits of detection (0.04?0.85 mg L-1 ) and quantification (0.04?1.41 mg L-1 ) according to other methods previously published with the difference of a run time of only 25 min. The results obtained in the characterization of the samples differed for juices and wines from other world regions, mainly because of the high values of (-)-epigallocatechin and trans-caftaric acid. The products analyzed showed high antioxidant activity, especially the wine samples with values higher than those from wines of different regions of the worl

Growth hormone 1 gene (GH1) polymorphisms as possible markers of the production potential of beef cattle using the Brazilian Canchim breed as a model

The growth hormone 1 gene (GH1) is a candidate gene for body weight and weight gain in cattle since it plays a fundamental role in growth regulation. We investigated the GH1 gene AluI and DdeI restriction enzyme polymorphisms, located 149 bp apart in the cattle genome, as possible markers of the production potential of Canchim crossbreed cattle, a 5/8 Charolais (Bos taurus) and 3/8 Nelore (Bos indicus) breed developed in Brazil, by evaluating the birth weight, weaning weight, yearling weight and plasma insulin-like growth factor-1 (IGF-1) concentration of 7 month to 10 months old Canchim calves (n = 204) of known genealogy and which had been genotyped for the AluI and DdeI markers. Our results showed significant effect (p < 0.05) between the homozygous DdeI+/DdeI+ polymorphism and the estimated breeding value for weaning weight (ESB-WW), while the AluI leucine homozygous (L/L) and leucine/valine (L/V) heterozygous polymorphisms showed no significant effect on the traits studied. The restriction sites of the two enzymes led to the formation of haplotypes which also exerted a significant effect (p < 0.05) on the ESB-WW, with the largest difference being 8.5 kg in favor of the homozygous L plus DdeI+/L plus DdeI+ genotype over the heterozygous L plus DdeI-/V plus DdeI+ genotype

Ocurrence of Nyssomyia intermedia (Lutz & Neiva) (Diptera: Psychodidae) in Paraná State, south of Brazil

Nyssomyia intermedia s. lat. tem sido citada por vários autores no Paraná. No entanto, alguns estudos apontam que esse táxon corresponde a Nyssomyia neivai (Pinto). Em coletas realizadas em galinheiro e em ambiente de mata, com armadilhas, entre novembro de 2005 e outubro de 2006, em Adrianópolis, Morretes e Pontal do Paraná, localizados na região de Mata Atlântica na Serra do Mar e no litoral do Paraná, sete fêmeas de Nyssomyia intermedia s. str. (Lutz & Neiva) foram encontradas juntamente com outras 14 espécies de flo ebotomíneos, confirmando a ocorrência de N.intermedia em área de costa e de mata Atlântica do Paraná.The occurrence of Nyssomyia intermedia s.lat. in the state of Paraná, Brazil, has been registered by several authors; however, studies have identified this taxon as belonging, in Paraná, to Nyssomyia neivai (Pinto). During captures with traps in a hen-house and forested areas, from November 2005 to October 2006, in Adrianópolis, Morretes and Pontal do Paraná, situated in the Atlantic forest domain, Paraná state, seven females of Nyssomyia intermedia s.str. (Lutz & Neiva) were collected together with other 14 sand floy species. Thus the occurrence of N. intermedia on the coast and in areas of Atlantic forest in Paraná is confirmed

Rectosigmoidectomy in a patient with a prolapsed sigmoid tumor: case report

Modelo de estudo: Relato de caso. Objetivo do estudo: Relatar o caso de uma paciente com prolapso de tumor colorretal localizado no sigmóide. Metodologia: Relato de caso obtido de prontuário. Resultados: É relatado o caso de uma paciente que aguardava cirurgia para ressecção oncológica de um tumor colorretal, quando foi encaminhada ao serviço de urgências médicas com episódio de prolapso retal contendo massa tumoral pós-evacuação, sem redução espontânea. A paciente foi encaminhada à cirurgia de urgência e submetida a uma abordagem transabdominal, na qual o prolapso foi reduzido, em seguida realizada retossigmoidectomia segundo procedimento de Hartamann com colostomia terminal no cólon descendente. Conclusões: No caso relatado, por tratar-se de um paciente portador de tumor de sigmóide prolapsado, a abordagem de escolha foi a retosigmoidectomia abdominal, seguindo os preceitos oncológicos, com ligadura da artéria mesentérica inferior em sua origem. Importância do problema: O prolapso de tumor de sigmóide, uma situação clínica relativamente incomum na população adulta, e uma complicação mais rara quando se trata dos tumores colorretais, deve ser tratado imediatamente após o diagnóstico para se diminuir o risco de isquemia do segmento prolapsado e sempre que possível oferecer a cirurgia que siga os preceitos oncológicos de tratamento. Comentários: No caso relatado, foi necessário uma abordagem cirúrgica de urgência, sendo a via abdominal escolhida por respeito aos princípios da cirurgia oncológica e ao menor tempo cirúrgicoDesign of the study: Case report. Objectives: To report a case of a patient with colorectal tumor prolapse located in the sigmoid. Methodology: A retrospective case report obtained from medical records. Results: We report a case of a patient awaiting surgery for tumor resection of a colorectal tumor, when she was sent to the service of medical emergencies with an episode of post-evacuation rectal prolapse with a tumor without spontaneous reduction. The patient was referred to emergency surgery and underwent a transabdominal approach, in which the prolapse was reduced then followed by Hartmann's rectosigmodectomy surgical procedure. Conclusions: Sigmoid tumor prolapse require a surgical approach, the approach of choice was abdominal retosigmoidectomy, following the oncological principles, with ligation of the inferior mesenteric artery at its origin. Relevance: Sigmoid tumor prolapse, a relatively unusual clinical situation in adults, and more rare complication when it comes to colorectal tumors, it must be treated immediately after diagnosis to reduce the risk of ischemia prolapsed segment, and whenever possible offer surgery to follow the precepts of cancer treatment. Comments: In the case reported, an emergency surgical approach was necessary, and the abdominal route was chosen following the principles of cancer surgery and shorter surgical tim