Histopathological pattern of endoscopic gastric biopsies in dyspeptic patients in a Nigerian population

Background and Objective: Dyspepsia is one of the most common complaints encountered in the general outpatient and gastroenterology clinics in Nigeria. Histopathological assessment of endoscopic gastric mucosa biopsy is crucial to delineate the exact cause of dyspepsia to guide patients' management. This study aimed to determine and document the histopathological basis of dyspepsia among dyspeptic patients at our facility. Material sand Methods: This was a three year descriptive retrospective study and the materials consisted of all gastric endoscopic biopsies taken from clinically diagnosed dyspeptic patients sent to the Department of Histopathology of the Federal Medical Centre, Owerri, Nigeria. Results: The biopsies were from 64 (53.2%) male patients and 56 (46.8%) female patients, giving a male to female ratio of 1.14:1. The age range of the patients was 28-82 years with a mean of 56 years at presentation. Helicobacter Pylori (H. Pylori) bacilli were identified in the samples of 42 (35%) patients but absent in samples of 78 (65%) patients. The histopathological pattern of the aetiological basis of dyspepsia in this study consisted of gastritis (96, 80%), functional (17, 14.2%), adenocarcinoma (4, 3.3%) and polyps (3, 2.5%). H. Pylori bacilli were seen only in patients with gastritis (42/96, 43.8%), and it affected 19 (45.2%) male patients and 23 (54.8%) female patients. Chronic active H. Pylori associated gastritis (24, 25%) was the most common form of gastritis seen during the study period. Conclusion: The main organic cause of dyspepsia in our setting was chronic gastric followed in the distant by gastric adenocarcinoma and polyp. Dyspepsia and H. Pylori associated gastritis did not show a significant gender predilection

Alfa no estado alterado de consciência: meditação Raja Yoga / Alpha density in altered state of consciousness: Raja Yoga meditation

Introdução: a meditação é uma técnica ancestral praticada por tradições religiosas e não religiosas, para alcançar benefícios espirituais e na saúde. É considerada um dos estados alterados de consciência. Estudos com ressonância magnética funcional e eletroencefalografia revelaram que existe diminuição da atividade cerebral no lóbulo parietal superior, durante a meditação. Na meditação, a frequência alfa aumenta no córtex cerebral quando comparada ao relaxamento e é caracterizada por ondas rítmicas associadas ao relaxamento e à diminuição de processo cognitivo. Objetivo: descrever e comparar a distribuição de potência da frequência cerebral alfa, nos estágios de MD e RL, nas regiões cerebrais frontal, central e occipital e, comparar as diferenças entre as regiões, de meditadores experientes da casa Brahma Kumaris, praticantes da meditação Raja Yoga, de Salvador ­ BA-Brasil. Metodologia: participaram 14 voluntários neste experimento. A coleta de dados foi realizada com EEG (21 eletrodos). O protocolo utilizado envolveu 6 minutos de relaxamento e 12 minutos de meditação. Os voluntários precisavam ter tido uma noite de sono adaptada à sua rotina e não terem ingerido bebidas estimulantes antes da coleta de dados. Resultados: encontrou-se aumento da densidade alfa na região occipital, na meditação para a média (µV2 / Hz), quando comparada às regiões frontal e central. Obteve-se um tamanho de efeito médio para alfa em relação às comparações entre as regiões frontal e central e um tamanho de efeito pequeno para alfa, entre as regiões central e occipital, durante o processo meditativo. Para as outras regiões, nenhum tamanho de efeito significativo para alfa foi encontrado. Conclusão: não foram encontradas diferenças significativas para alfa, entre os estados de meditação e relaxamento, porém a densidade de potência alfa foi maior na região occipital, quando comparada com as regiões frontal e central; entretanto, essa diferença não apresentou um tamanho de efeito do d de Cohen de relevante magnitude.

Introduction: meditation is an ancient technique practiced by religious and non-religious traditions to achieve spiritual and health benefits. It is considered one of the altered states of consciousness and studies with fMRI and EEG revealed that there is decreased brain activity in the upper parietal lobe during meditation. In meditation, alpha frequency increases in the cerebral cortex when compared to relaxation and is characterized by rhythmic waves associated with relaxation and decreased cognitive process. Objective: to describe and compare the EEG alpha power density distribution during the stages of meditation and relaxation in the frontal, central and occipital regions of experienced Brahma Kumaris Rajayoga meditators. Methodology: volunteers in number of 14 participated in this experiment. Data collection was performed with EEG (21 electrodes). The protocol used involved six minutes of relaxation and 12 minutes of meditation. Volunteers needed to have had a night's sleep suited to their routine and had not inhaled stimulant drinks prior to data collection. Results: we found an increase in alpha density in the occipital region in meditation for the general mean (µV2 / Hz), when compared to the frontal and central regions. A mean effect size for alpha was obtained relative to the comparisons between the frontal and central regions and a small effect size for alpha between the central and occipital regions during meditative process. For the other regions, no significant effect size for alpha was found. Conclusion: no significant differences were found for alpha between the states of meditation and relaxation, but the alpha potency density was higher in the occipital region, when compared with the frontal and central regions; however, this difference did not present a Cohen's d effect size of relevant magnitude

Fatty acid profile in vertical strata of elephant grass subjected to intermittent stocking

ABSTRACT The milk and meat from animals with a pasture-based diet have higher proportions of CLA and C18:3 and lower omega-6:omega-3 ratios than products from animals with diets based on corn silage and concentrate. However, most of the published studies have evaluated fatty acid profiles in temperate climate grasses and the literature with tropical grasses is scarce. Thus, the aim of this study was to evaluate the morphological and fatty acid compositions in the vertical strata of elephant grass (Pennisetum purpureum Schum.) swards subjected to grazing heights (90 or 120 cm pre-grazing heights) and levels of defoliation (50% or 70% removal of the initial pre-grazing height). There were no interactions among pre-grazing height, the level of defoliation and grazing stratum. However, higher proportion of C18:3 (58% and 63%) was found in the 90-cm swards and in the half upper stratum. A higher proportion of C18:3 was associated with a higher leaf proportion and crude protein content. Thus, the upper stratum of sward or a grazing management scheme (e.g. first-last stocking) resulting in a higher proportion of leaves and crude protein both provide higher proportions of C18:3 to animals grazing in elephant grass swards.

Effects of cryoprotectants and low temperatures on hatching and abnormal embryo development of Prochilodus lineatus (Characiformes: Prochilodontidae)

This study evaluated the effect of the cryoprotectants and the low temperatures on the embryonic development of Prochilodus lineatus, describing their main morphological alterations. On chilling sensitivity test, the survival rates at the twenty somites stage (20S) were 53.6% at 0ºC, and 100% in 5ºC. To test toxicity, the embryos were exposed to a graded series of 1,2-Propanediol (PROP), dimethyl sulfoxide (Me2SO4) and glycerol (GLY), terminating in a solution of high osmolarity. There was no significant difference in the embryos survival of toxicity test between series of PROP and Me2SO4 in the 6S and 20S. In the cooling protocols, were evaluated the effects of low temperature associated with cryoprotectants. At 5ºC, PROP showed survival rates above 75% in the gastrula stage (G) and above 90% in the 6S and 20S stages. High rates of abnormalities were observed, and the most recurrent were: small bodies, fins presenting uncontrolled cell growth, membrane rupture, and retraction. These results demonstrate the need to use cryoprotectant solutions, even when there is no ice nucleation, and, on the other hand, shows that high cryoprotectant concentrations promote numerous morphological lesions, compromising normal embryonic development.(AU)

Este estudo avaliou os efeitos dos crioprotetores e das baixas temperaturas no desenvolvimento embrionário de Prochilodus lineatus, descrevendo suas principais alterações morfológicas. Nos testes de sensibilidade ao frio, as taxas de sobrevivência, no estágio de vinte somitos (20S), foram de 53,6% a 0ºC e 100% a 5ºC. Nos testes de toxicidade, os embriões foram expostos a uma série graduada dos crioprotetores: 1,2-Propanediol (PROP), dimetilsulfóxido (Me2SO4) e glicerol (GLY), terminando em uma combinação de alta osmolaridade. Não houve diferença significativa na sobrevivência dos embriões nas séries do PROP e Me2SO4 nos estágios de 6S e 20S. Nos protocolos de resfriamento, foram avaliados os efeitos da baixa temperatura associados as séries crioprotetoras. A 5ºC, o PROP apresentou taxas de sobrevivência acima de 75% no estádio de gástrula (G) e acima de 90% nos estádios 6S e 20S. Foram observadas altas taxas de anormalidades sendo as mais recorrentes: corpos pequenos, nadadeiras apresentando crescimento celular descontrolado, ruptura da membrana e retração vitelínica. Estes resultados demonstram a necessidade do uso das soluções crioprotetoras, mesmo não havendo nucleação de gelo e, em contrapartida, demonstra que as elevadas concentrações crioprotetoras promovem numerosas lesões morfológicas, comprometendo o desenvolvimento embrionário.(AU)

Comparative study of five commercial probes for the detection of Epstein-Barr virus (EBV) by in situ hybridization in cases of nodular sclerosis Hodgki's lymphoma / Estudo comparativo de cinco sondas comerciais para detecção do vírus Epstein-Barr (EBV) por hibridização in situ em casos de linfoma de Hodgkin esclerose nodular

ABSTRACT Introduction: Epstein-Barr virus (EBV) may serve as a target in therapeutic treatments, thus reliable diagnostic results are necessary. Objective: The aim of this study was to evaluate the accuracy of EBV detection by in situ hybridization (ISH) using five commercial probes in formalin-fixed and paraffin-embedded samples of nodular sclerosis Hodgkin's lymphoma (HL), and to compare the results with immunohistochemistry (IHC) and polymerase chain reaction (PCR). Material and method: Thirty samples were selected, 28 were lymph nodes, one bone marrow and one mediastinum. The following parameters were analyzed: signal intensity; proportionality of positive cells; quality of the reaction according to comfort for evaluation, sign quality and homogeneity of labeled cells; background reaction; morphology; presence of artifacts; and positivity in other non-neoplastic cells. All samples were analyzed for EBV detection using the five probes, IHC for latent membrane protein type 1 (LMP1) and PCR for Epstein Barr virus nuclear antigen 1 (EBNA1). Statistical analyses were performed with the R1 software; Fleiss' test and Cohen Kappa index of 5% were considered significant. Results: The detection by IHC-LMP1 was 26.7% (8/30) and 66.7% (20/30) by PCR-EBNA1. All probes detected EBV. Positivity was observed in 42/90 (46.7%), 38/90 (42.2%), 45/90 (50%), 27/90 (30%) and 61/90 (67.8%) for probes A, B, C, D and E, respectively. Discussion: All five probes demonstrated positivity. Conclusion: Probe E showed better rate (67.8%), sensitivity, specificity and accuracy (100%), a very good correlation among the different observers and with PCR, besides great cost-benefits relation.

RESUMO Introdução: O vírus Epstein-Barr (EBV) pode servir como alvo nos tratamentos terapêuticos, sendo necessário resultado diagnóstico confiável. Objetivo: Avaliar a acurácia da detecção do EBV pela hibridização in situ (ISH), utilizando cinco sondas comerciais em amostras fixadas em formalina e incluídas em parafina de linfoma de Hodgkin (LH) esclerose nodular, comparando os resultados com a imuno-histoquímica (IHQ) e a reação em cadeia pela polimerase (PCR). Material e método: Trinta amostras foram selecionadas, sendo 28 linfonodos, uma medula óssea e um mediastino. Os seguintes parâmetros foram analisados: intensidade do sinal; proporcionalidade das células positivas; qualidade da reação de acordo com o conforto na avaliação, qualidade do sinal e homogeneidade das células marcadas; reação de fundo; morfologia; presença de artefatos; e positividade em outras células não neoplásicas. Todas as amostras foram analisadas para a detecção do EBV usando as cinco sondas, IHQ para proteína da membrana latente tipo 1 (LMP1) e PCR para antígeno nuclear do EBV (EBNA1). As análises estatísticas foram realizadas com o software R1; os índices de 5% para Kappa de Fleiss e Cohen foram considerados significantes. Resultados: A detecção pela IHQ-LMP1 foi de 26,7% (8/30) e 66,7% (20/30) pela PCR-EBNA1. Todas as sondas detectaram EBV. A positividade foi observada em 42/90 (46,7%), 38/90 (42,2%), 45/90 (50%), 27/90 (30%) e 61/90 (67,8%) para as sondas A, B, C, D e E, respectivamente. Discussão: Todas as sondas demonstraram positividade. Conclusão: A sonda E mostrou melhor taxa (67,8%), sensibilidade, especificidade e precisão (100%), boa correlação entre os diferentes observadores e com a PCR, além de ótimo custo/benefício.

Perfil citológico pulmonar de bezerros sadios nos três primeiros meses de vida / Pulmonary cytological profile of healthy calves in the first three months of life

A citologia é um importante exame complementar utilizado para a detecção de alterações no perfil celular do trato respiratório e auxílio no diagnóstico de doenças. No entanto, como os primeiros meses de vida compõem o período de adaptação à vida extrauterina resultando em possíveis alterações das populações celulares, é essencial a padronização das características comuns aos animais sadios, possibilitando a identificação e análise de qualquer mudança no quadro esperado. O objetivo desta pesquisa foi caracterizar o perfil celular por citologia do lavado bronco alveolar obtido semanalmente por broncoscopia de dez bezerros durante os três primeiros meses de vida. A análise estatística foi realizada utilizando-se o software Minitab® 15.0, empregando-se o teste T pareado para as amostras paramétricas e Mann-Whitney para as amostras não paramétricas, considerando nivel de significância P≤0,05. Os resultados obtidos apontaram que o perfil celular do lavado bronco alveolar de bezerros hígidos durante os primeiros 90 dias de vida apresentou predomínio de macrófagos, com média geral de 63,17%, seguido de 33,69% de neutrófilos. Porém observou-se diminuição significativa na porcentagem de macrófagos (P=0,04) e aumento de neutrófilos (P=0,05) ao longo dos momentos, comprovada pela forte correlação negativa entre as porcentagens de macrófagos e neutrófilos ao longo dos momentos. Não houve diferença entre as porcentagens de células gigantes, células epiteliais, linfócitos, eosinófilos e basófilos durante o experimento. Apesar dos resultados serem influenciados por fatores ambientais e de manejo, os resultados dessa pesquisa fornecem subsídios para a identificação de alterações críticas que descaracterizem o perfil celular de bezerros acometidos por doenças respiratórias.

Cytology is an important supplementary test used for the detection of changes in the mobile profile of the respiratory tract and aid in the diagnosis of diseases. However, as the first few months of life make up the period of adjustment to extrauterine life resulting in possible changes in cellular populations, it is essential to the standardization of the characteristics common to healthy animals, enabling the identification and analysis of any change in the expected frame. The objective of this research was to characterize the cellular profile by cytology of bronchoalveolar lavage obtained weekly for bronchoscopy of ten calves during the first three months of life. Statistical analysis was performed using the Minitab® 15.0 software, using the paired T test for parametric samples, and Mann-Whitney for nonparametric samples, considering significance level as P≤0,05. The results obtained showed that the profile of bronchoalveolar lavage of healthy calves during the first 90 days of life showed a predominance of macrophages, with medium average of 63.17%, followed by 33.69% neutrophils. However it was observed significant decrease in percentage of macrophages (P=0.04) and increased neutrophils (P=0,05) over the times, proven by the strong negative correlation between percentages of macrophages and neutrophils along the times. There was no difference between the percentages of giant cells, epithelial cells, lymphocytes, eosinophils and basophils during the experiment. Although the results are influenced by environmental factors and management, the results of this research provide subsidies for the identification of critical changes in cell profile of calves affected by respiratory diseases.

The influence of aerobic fitness status on ventilatory efficiency in patients with coronary artery disease

OBJECTIVE: To test the hypotheses that 1) coronary artery disease patients with lower aerobic fitness exhibit a lower ventilatory efficiency and 2) coronary artery disease patients with lower initial aerobic fitness exhibit greater improvements in ventilatory efficiency with aerobic exercise training. METHOD: A total of 123 patients (61.0±0.7 years) with coronary artery disease were divided according to aerobic fitness status into 3 groups: group 1 (n = 34, peak VO2<17.5 ml/kg/min), group 2 (n = 67, peak VO2>17.5 and <24.5 ml/kg/min) and group 3 (n = 22, peak VO2>24.5 ml/kg/min). All patients performed a cardiorespiratory exercise test on a treadmill. Ventilatory efficiency was determined by the lowest VE/VCO2 ratio observed. The exercise training program comprised moderate-intensity aerobic exercise performed 3 times per week for 3 months. Clinicaltrials.gov: NCT02106533 RESULTS: Before intervention, group 1 exhibited both lower peak VO2 and lower ventilatory efficiency compared with the other 2 groups (p<0.05). After the exercise training program, group 1 exhibited greater improvements in aerobic fitness and ventilatory efficiency compared with the 2 other groups (group 1: ▵ = -2.5±0.5 units; group 2: ▵ = -0.8±0.3 units; and group 3: ▵ = -1.4±0.6 units, respectively; p<0.05). CONCLUSIONS: Coronary artery disease patients with lower aerobic fitness status exhibited lower ventilatory efficiency during a graded exercise test. In addition, after 3 months of aerobic exercise training, only the patients with initially lower levels of aerobic fitness exhibited greater improvements in ventilatory efficiency. .

Perfil metabólico de vacas mestiças leiteiras com baixo escore de condição corporal no periparto / Metabolic profile in crossbred dairy cows with low body condition score in the peripartum period

Objetivou-se avaliar o perfil metabólico energético, proteico e enzimático de vacas mestiças leiteiras com baixo escore de condição corporal (ECC) no periparto. Foram colhidas amostras sanguíneas uma semana antes do parto, no dia do parto, e aos sete, 14, 21, 28 e 43 dias pós-parto (DPP) de 36 animais, com média de ECC de 2,6±0,5, com eutocia e pós-parto fisiológico e sem tratamentos nesta fase. Analisaram-se as concentrações séricas de proteínas totais, albumina e globulinas para o perfil protéico; AST, ALT, GGT e fosfatase alcalina para o perfil enzimático; ácidos graxos não-esterificados (NEFA), β-hidroxibutirato (BHBA), triglicerídeos, colesterol e lipoproteínas (VLDL, HDL e LDL) para o perfil energético. As vacas apresentaram no pré-parto hipoproteinemia, hipoalbuminemia, hipocolesterolemia e aumento das enzimas GGT e AST. No dia do parto houve lipólise e hipoglobulinemia. Concluiu-se que vacas mestiças leiteiras com baixo ECC apresentam balanço energético negativo, hipoproteinemia com hipoalbuminemia e lesão hepática no periparto, com restabelecimento aos 30 DPP, mas não recuperam sua condição corporal até o final do puerpério.

The aim of this study was to evaluate the metabolic profile of protein, energy and enzyme in crossbred dairy cows with low body condition score (BCS) in the peripartum period. Blood samples were collected from 36 animals with 2.6±0.5 BCS, eutocia, physiological postpartum and without any treatment, on following days: one week before calving, calving and 7, 14, 21, 28 and 43 days in milk (DIM). It was evaluated serum total protein, albumin and globulins for protein profile; AST, ALT, GGT and alkaline phosphatase for mineral profile; nonesterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), triglycerides, cholesterol and lipoproteins (VLDL, HDL and LDL) for energy profile. Crossbred dairy cows had hypoproteinemia, hypoalbuminemia, hypocholesterolemia and increased that both enzymes AST and GGT at the precalving. There were lipolysis and hypoglobulinemia at parturition. It was concluded that crossbred dairy cows with low BCS have negative energy balance, hypoproteinemia with hypoalbuminemia and hepatic injury in the peripartum. This condition is restored at 30 DIM, but there is no recovery of the body condition by the end of puerperium.

Short-term add-on therapy with angiotensin receptor blocker for end-stage inotrope-dependent heart failure patients: B-type natriuretic peptide reduction in a randomized clinical trial

OBJECTIVE: We aimed to evaluate angiotensin receptor blocker add-on therapy in patients with low cardiac output during decompensated heart failure. METHODS: We selected patients with decompensated heart failure, low cardiac output, dobutamine dependence, and an ejection fraction <0.45 who were receiving an angiotensin-converting enzyme inhibitor. The patients were randomized to losartan or placebo and underwent invasive hemodynamic and B-type natriuretic peptide measurements at baseline and on the seventh day after intervention. ClinicalTrials.gov: NCT01857999. RESULTS: We studied 10 patients in the losartan group and 11 patients in the placebo group. The patient characteristics were as follows: age 52.7 years, ejection fraction 21.3%, dobutamine infusion 8.5 mcg/kg.min, indexed systemic vascular resistance 1918.0 dynes.sec/cm5.m2, cardiac index 2.8 L/min.m2, and B-type natriuretic peptide 1,403 pg/mL. After 7 days of intervention, there was a 37.4% reduction in the B-type natriuretic peptide levels in the losartan group compared with an 11.9% increase in the placebo group (mean difference, -49.1%; 95% confidence interval: -88.1 to -9.8%, p = 0.018). No significant difference was observed in the hemodynamic measurements. CONCLUSION: Short-term add-on therapy with losartan reduced B-type natriuretic peptide levels in patients hospitalized for decompensated severe heart failure and low cardiac output with inotrope dependence. .

Lifting do púbis após grande perda ponderal / Lifting of the mons pubis after massive weigth loss

This article describes the surgical planning, conducts pre and post operatively, results in the Lifting Pubic ex-obese patients submitted to gastroplasty or not, that feature large sagging skin and excess fat from the pubis. Method: Two hundred and eighteen patients underwent surgery from May 2005 to August 2012. The pubic lifting was held in conjunction with the Anchor Adbominoplasty. The pubis was raised through points positioned 2-3 cm above its original position in the aponeurosis of the muscles rectus abdominis. Traction lines were directed from the center to up and the sides of the pubis and abdominal flaps were pulled to the midline of the abdomen No significant complication was observed, which could compromise the final result. Results: The elevation of the pubis, the correct shape and resection of excess adipocutâneos were achieved in all cases, bringing satisfaction to patients. Conclusion: Considering the pubic deformity after massive weight loss, and the results obtained, the procedures adopted proved to be safe, easily reproducible and stable over the longterm...

O presente artigo descreve o planejamento cirúrgico, as condutasde pré e pós-operatório, e os resultados do lifting púbico em pacientes ex-obesos, submetidos ou não à Gastroplastia, que apresentavam grande flacidez cutânea e excesso adiposo do púbis Método: Duzentos e dezoito pacientes foram submetidos à cirurgia no período de maio de 2005 a agosto de 2012. O Lifting pubiano foi realizado conjuntamente com a Abdominoplastia em ãncora. O púbis foi elevado por meio de pontos posicionados 2 a 3 cm acima de sua posição original, na aponeurose dos retos abdominais. Vetores de tração foram direcionados do centro do púbis para cima e para os flancos e os retalhos abdominais foram tracionados para a linha média do abdome. Nenhuma complicação significativa foi observada que pudesse comprometer o resultado final. Resultados: A elevação do púbis, a correção do formato e a ressecção, dos excessos adipocutâneos, foram alcançadas em todos os casos, trazendo satisfação aos pacientes. Conclusão: Considerando-se a deformidade pubiana após grandes perdas ponderais e os resultados obtidos, os procedimentos adotados mostraram-se seguros, facilmente reproduzíveis e estáveis a longo prazo...

Yeast communities in two Atlantic rain Forest fragments in Southeast Brazil / Comunidades de leveduras em dois fragmentos de Mata Atlântica no sudeste do Brasil

We studied the yeast communities associated with fruits, mushrooms, tree exudates, and flies of the genus Drosophila, in two Atlantic Rain Forest fragments in state of Minas Gerais, Brazil. A total of 456 samples were collected from Rio Doce State Park and 142 from Ecological Station of Universidade Federal de Minas Gerais. From these samples, 608 yeast isolates were obtained, belonging to 71 different species. Among the yeasts isolated from Rio Doce State Park, 17 isolates were recovered from fruits, 12 from mushrooms, 13 from tree exudates, and 299 from Drosophila spp. In the Ecological Station of Universidade Federal de Minas Gerais, 24 isolates were recovered from fruits and 243 from Drosophila spp. Distinct communities of yeast were observed in Drosophila flies, fruits, mushrooms and tree exudates. The highest number of yeast species was recovered from Drosophila flies suggesting that flies are the natural vectors of these microorganisms.

O objetivo deste trabalho foi estudar as comunidades de leveduras associadas a frutos, cogumelos, exudatos de árvores e moscas do gênero Drosophila, em dois fragmentos de Mata Atlântica no Estado de Minas Gerais, Brasil. Foram coletadas 456 amostras no Parque Estadual do Rio Doce e 142 na Estação Ecológica da Universidade Federal de Minas Gerais. Destas amostras foram obtidas 608 isolados de levedura, distribuídas em 71 espécies. Entre os isolados obtidos a partir do Parque Estadual do Rio Doce, 17 foram provenientes de frutos, 12 de cogumelos, 13 de exudatos de árvores e 299 de Drosophila spp. A Estação Ecológica da Universidade Federal de Minas Gerais possibilitou a obtenção de 24 isolados de frutos e 243 de Drosophila spp. Foram observadas comunidades distintas de leveduras associadas a Drosophila, frutos, cogumelos e exudatos de árvores. O maior número de espécies foi obtido em drosófilas, sugerindo que estas moscas são vetores naturais destes microrganismos.

Biological effects of an aqueous extract of Salix alba on the survival of Escherichia coli AB1157 cultures submitted to the action of stannous chloride

Stannous chloride (SnC12) is used in nuclear medicine as a reducing agent to obtain technetium-99m-radiopharmaceuticals. It have been reported that natural products might reduce the genotoxic and cytotoxic effects related to SnC12. This work evaluated the biological effects of an aqueous extract of Salix alba on the survival of Escherichia coli (E. coli) AB1157 (wild type) cultures submitted to the action of SnC12. E. coli AB1157 cultures (exponential growth phase) were collected by centrifugation, washed and resuspended in 0.9 percentNaCl. Samples were incubated in water bath shaker with: (a) SnC12 (25mg/ml), (b)Salix alba extract(11.6mg/ml) and (c)SnC12(25mg/ml) + Salix alba extract (11.6mg/ml). Incubation with 0.9 percent NaCl was also carried out (control). At 60 min intervals, aliquots were withdrawn, diluted, spread onto Petri dishes with solid LB medium and incubated overnight. The colonies formed were counted and the survival fractions calculated. The extract was not able to protect the E. coli cultures against the lesive action of SnC12. The extract also did not interfere with the survival of the cultures. It suggested that the substances present in the Salix alba aqueous extract did not interfere strongly with cellular metabolism and did not alter the survival fractions of E. coli AB 1157. It is speculated that this extract cannot interfere with the generation of free radicals, the possible main agent responsible for SnC12 lesive action.

Biological control of Penicillium italicum, P. digitatum and P. expansum by the predacious yeast Saccharomycopsis schoenii on oranges

In this study we evaluated the ability of Saccharomycopsis schoenii Nadson and Krassiln (UWO-PS 80-91) as biocontrol agent against plant pathogenic filamentous fungi P. expansum Link (UFMG 01-2002), P. italicum Wehmer (LCP 61.1199), and P. digitatum (Pers.: Fr.) (LCP 984263, LCP 68175 and LCP 4354). S. schoenii was able to reduce disease severity in oranges inoculated with all fungi. Among the phytopathogens, P. digitatum LCP4354 was the most virulent whereas P. digitatum LCP 68175 was the most susceptible to predation. The yeast was able to survive for 21 days on the fruit surface and did not produce lesions on oranges. Production of antagonistic substances by S. schoenii was not detected using standard techniques. Our results point to the potential use of S. schoenii to control postharvest phytopathogens in fruits.

Este estudo avaliou a capacidade de levedura Saccharomycopsis schoenii Nadson & Krassiln (UWO-PS 80-91) em controlar o crescimento dos fungos fitopatogênicos Penicillium expansum Link (UFMG 01-2002), P. italicum Wehmer (LCP 61.1199), e P. digitatum (Pers.: Fr.) (LCP 984263, LCP 68175 e LCP 4354). S. schoenii reduziu a severidade da doença em laranjas inoculadas com todos os fitopatógenos testados. Entre estes fitopatógenos, P. digitatum LCP4354 apresentou a maior virulência enquanto que P. digitatum LCP 68175 foi o mais suscetível à predação. A levedura foi capaz de permanecer viável, sem produzir lesões na superfície dos frutos por 21 dias. Outra característica desejável observada foi a ausência de produção de substâncias antagonistas. Sendo assim, este trabalho evidência o potencial de utilização da levedura S. schoenii em protocolos de controle biológico de doenças pós-colheita em laranjas.

1, 4- Addition of diazomethane to a heterodiene: a direct preparation of the oxazolic ring

The reaction of naphthoquinone-oximes (3) and (4) with diazomethane yields directly, in one step, the oxazoles (5) and (6), respectively.

A reação das naphthoquinona-oximas (3) e (4) com diazometano fornece diretamente, em uma etapa, os oxazóis (5) e (6), respectivamente.

Tratamento de fratura diafisária tibial em gatos, com pinos de transfixaçäo percutânea, imobilizados por resina acrílica, com e sem pino intramedular / Treatment of tibial diaphyseal fracture in cats using pecutaneous transfixing pins, imobilized by acrilic resin, with and without intramedullary pin

Dois grupos de sete gatos sem raça definida, com idade entre 6 meses e 7 anos e peso de 0,75 e 3,30 kg, foram submetidos a fratura completa, transversa, diafisária da tíbia. Após reduçäo, a fratura foi estabilizada por quatro pinos de transfixaçäo percutânea, imobilizados por resina acrílica nos animais do grupo I. Nos do grupo II, a fratura foi reduzida e alinhada com um pino intramedular antes de técnica da transfixaçäo. A evoluçäo foi avaliada por exames físicos e radiográficos. O método empregado no grupo II permitiu reduçäo e alinhamento mais eficientes, conferindo maior estabilidade, embora o tempo para consolidaçäo das fraturas tenha sido mais prolongado que nos animais do grupo I