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A má-oclusão de classe II é frequente na população que procura tratamento ortodôntico. É caracterizada por alterações no sentido anteroposterior, podendo ser esquelética e/ou dentoalveolar. A distalização do molar superior pode ser um complemento de uma ação ortopédica prévia ou solução efetiva para a correção da classe II. O objetivo deste trabalho foi apresentar o mecanismo de ação do arco seccional “Z”, relatando alguns casos clínicos tratados com este dispositivo, confeccionado com fio Elgiloy azul associado a elásticos intermaxilares, promovendo a distalização dos segmentos posteriores e tornando o tratamento desse tipo de dismorfose uma tarefa menos árdua para o ortodontista.

The class II malocclusion is common in people seeking orthodontic treatment. It is characterized by changes in the anteroposterior direction may be skeletal and/or dentoalveolar. Distalization the molar can be a complement to prior orthopedic action or effective solution for the correction of Class II. The objective of this paper is to present the mechanism of action of the sectional arch "Z" reporting one case treated with this device, which is made with blue Elgiloy wire associated with intermaxillary elastics, promoting distal movement of posterior segments, making treatment such dismorfose a less arduous task to the orthodontist.

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AIMS: To evaluate the probiotic properties of strains isolated from smoked salmon and previously identified as bacteriocin producers. METHODS AND RESULTS: Strains Lactobacillus curvatus ET06, ET30 and ET31, Lactobacillus fermentum ET35, Lactobacillus delbrueckii ET32, Pediococcus acidilactici ET34 and Enterococcus faecium ET05, ET12 and ET88 survived conditions simulating the gastrointestinal tract (GIT) and produced bacteriocins active against several strains of Listeria monocytogenes, but presented very low activity against other lactic acid bacteria (LAB). Cell-free supernatants containing bacteriocins, added to 3-h-old cultures of L. monocytogenes 603, suppressed growth over 12 h. Auto-aggregation was strain-specific, and values ranged from 7·2% for ET35 to 12·1% for ET05. Various degrees of co-aggregation with L. monocytogenes 603, Lactobacillus sakei ATCC 15521 and Enterococcus faecalis ATCC 19443 were observed. Adherence of the bacteriocinogenic strains to Caco-2 cells was within the range reported for Lactobacillus rhamnosus GG, a well-known probiotic. The highest levels of hydrophobicity were recorded for Lact. curvatus (61·9­64·6%), Lact. fermentum (78·9%), Lact. delbrueckii (43·7%) and Ped. acidilactici (51·3%), which are higher than the one recorded for Lact. rhamnosus GG (53·3%). These strains were highly sensitive to several antibiotics and affected by several drugs from different generic groups in a strain-dependent manner. CONCLUSIONS: Smoked salmon is a rich source of probiotic LAB. All strains survived conditions simulating the GIT and produced bacteriocins active against various pathogens. Adherence to Caco-2 cells was within the range reported for Lact. rhamnosus GG, a well-known probiotic. In addition, the high hydrophobicity readings recorded define the strains as good probiotics.

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Allergic reactions to the pollen of trees is among the most prevalent allergic sensitivities. The cashew tree grows in abundance in the northeast region of the Brazil, mainly in Fortaleza city, in state of the Ceará. It flowers once a year between August and October. This is the first study conducted to establish the possible role of the cashew pollen extract in causing skin test reactivity in patients with allergic asthma. A stock solution of pollen extract was prepared with the standard weight/volume method for intradermal skin tests and for the protein content of the extract, estimated with the use of Folin phenol reagent and a spectrophotometer. Ten nonallergic volunteers and 80 subjects with allergic asthma, as documented by previous positive skin test reactions to various pollens, were studied. All of the 80 patients (100%) had positive test reactions (grade III and grade IV reactions). None of the control subjects (n = 10) had positive responses to the intradermal tests. This study provided us with knowledge of an additional pollen extract of the Anacardium occidentale, which could provoke skin test reactivities in asthmatic individuals from the northeastern area of Brazil. The results suggest a relationship between the period of flowering of the cashew tree and the increased number of allergic asthma cases.

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Microbial fish silage was produced from ground low commercial fish species added with 15% mollase and stored at 35 degrees C. Experiment were conducted to evaluate the effect of the addition of a commercial preparation of bromeline (0.20-0.90%) to the fish silage. Liquefaction was evaluated measuring both the product consistency and its non protein nitrogen content. Results indicate that bromeline addition (0.7 or higher), increases dramatically the rate of proteolysis and decreases the time required for liquefaction from 15 days (no enzyme control) to only 12 hours. Therefore, the use of the commercial preparation of bromeline is highly recommended for silage production.

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