Damage monitoring in fibre reinforced mortar by combined digital image correlation and acoustic emission

International audienceThe present work aims at developing a methodology for the detection and monitoring of damage and fractures in building materials in the prospects of energetic renovation. Digital image correlation (DIC) and acoustic emission (AE) monitoring were simultaneously performed during tensile loading tests of fibre reinforced mortar samples. The full-field displacement mappings obtained by DIC revealed all ranges of cracks, from microscopic to macroscopic, and an image processing procedure was conducted as to quantify their evolution in the course of the degradation of the samples. The comparison of these measurements with the acoustic activity of the material showed a fair match in terms of quantification and localisation of damage. It is shown that after such a calibration procedure, AE monitoring can be autonomously used for the characterisation of damage and fractures at larger scales

Characterization of TvDMC1 and TvSOD6 expression and function in trichomonas vaginalis

Trichomonas vagina/is is a common sexually transmitted disease, affecting women more often than men. It has only been seen to undergo mitosis, even though published studies have confinned the organism has meiotic proteins. These meiotic proteins are known to function in other organisms with a key protein in homologous recombination, DMCl. RT-PCR analysis shows low expression ofDMCl in mitotically-growing cultures, and we found that some stresses on the organism increase DMCl expression. Polyclonal antibodies raised against DMCl protein have been used to test whole celllysates of the Tl and G3 strains of Trichomonas vagina/is but no obvious expression has been detected. We also used western blot analysis to show that superoxide dismutase is expressed in the standard lab strains Tl and G3 and immunocytochemistry studies showed that HA-tagged SOD6 protein localizes in the cytoplasm. Lastly, we found that SOD protein abundance increased in the CDC085 strain compared to Tl and G3, especially under aerobic conditions

Characterization of TvDMC1 and TvSOD6 expression and function in trichomonas vaginalis

Trichomonas vagina/is is a common sexually transmitted disease, affecting women more often than men. It has only been seen to undergo mitosis, even though published studies have confinned the organism has meiotic proteins. These meiotic proteins are known to function in other organisms with a key protein in homologous recombination, DMCl. RT-PCR analysis shows low expression ofDMCl in mitotically-growing cultures, and we found that some stresses on the organism increase DMCl expression. Polyclonal antibodies raised against DMCl protein have been used to test whole celllysates of the Tl and G3 strains of Trichomonas vagina/is but no obvious expression has been detected. We also used western blot analysis to show that superoxide dismutase is expressed in the standard lab strains Tl and G3 and immunocytochemistry studies showed that HA-tagged SOD6 protein localizes in the cytoplasm. Lastly, we found that SOD protein abundance increased in the CDC085 strain compared to Tl and G3, especially under aerobic conditions

A Case Report Describing a Rare Presentation of Simultaneous Occurrence of MPO-ANCA-Associated Vasculitis and Rheumatoid Arthritis

Background. Renal-limited myeloperoxidase vasculitis with simultaneous rheumatoid arthritis is reported as a rare occurrence. Review of literature suggests that most patients had a diagnosis of rheumatoid arthritis for several years prior to presenting with renal failure from myeloperoxidase vasculitis. Case Presentation. A 58-year-old Caucasian male presented to the hospital experiencing malaise, fevers, decreased oral intake, nausea, and vomiting for one week duration. His past medical history consisted of newly diagnosed but untreated rheumatoid arthritis, hypertension, and non-insulin-dependent diabetes mellitus. He was found to have acute renal failure, proteinuria, and hypoglycemia. Standard therapy, including intravenous fluids, did not improve his acute renal failure. A vasculitis workup resulted in a positive myeloperoxidase anti-neutrophil cytoplasmic antibody (MPO-ANCA). Renal biopsy revealed crescentic glomerulonephritis (GN) pauci-immune type, suggestive of MPO-ANCA-associated vasculitis (MPO-AAV). Treatment consisted of prednisone, cyclophosphamide, and seven cycles of plasmapheresis, in addition to hemodialysis for uremia. Upon discharge, he received hemodialysis for another week and continued treatment with cyclophosphamide and prednisone. Conclusion. Patients with longstanding rheumatoid arthritis may develop renal failure due to nonsteroidal anti-inflammatory medication use and AA type amyloidosis; however, necrotizing glomerulonephritis with crescent formation has been rarely reported. This stresses the importance of early recognition and swift initiation of treatment

In vitro effects of a chemical inhibitor targeting superoxide dismutase on the growth of Trichomonas vaginalis

Trichomonas vaginalis is a protozoal pathogen infecting both men and women, causing the disease trichomoniasis, one of the most common sexually-transmitted diseases. Currently, there are only two FDA-approved treatments, metronidazole and tinidazole; however, drug resistance remains a threat in treating the disease. Due to few treatments available, we are screening new compounds to see if they inhibit the growth of the organism. This study focuses on the role of superoxide dismutase on in vitro growth. Superoxide dismutase is an enzyme that eliminates harmful superoxide ions that damage cells. Using the SOD inhibitor, sodium diethylthiocarbamate trihydrate, we are testing whether treatment with this compound can inhibit in vitro growth of T. vaginalis; as well as determine whether abrogation of SOD activity increases metronidazole susceptibility of the organism. This work may highlight new opportunities for alternative chemotherapies against T. vaginalis

In vitro effects of a chemical inhibitor targeting superoxide dismutase on the growth of Trichomonas vaginalis

Trichomonas vaginalis is a protozoal pathogen infecting both men and women, causing the disease trichomoniasis, one of the most common sexually-transmitted diseases. Currently, there are only two FDA-approved treatments, metronidazole and tinidazole; however, drug resistance remains a threat in treating the disease. Due to few treatments available, we are screening new compounds to see if they inhibit the growth of the organism. This study focuses on the role of superoxide dismutase on in vitro growth. Superoxide dismutase is an enzyme that eliminates harmful superoxide ions that damage cells. Using the SOD inhibitor, sodium diethylthiocarbamate trihydrate, we are testing whether treatment with this compound can inhibit in vitro growth of T. vaginalis; as well as determine whether abrogation of SOD activity increases metronidazole susceptibility of the organism. This work may highlight new opportunities for alternative chemotherapies against T. vaginalis

The French touch in entomological biology : synthesis of the "16th Colloque Biologie de l'Insecte"

Pas de résumé, pas de mots clés,pas de doi.International audience

A Case of Chronic Cough in a Winemaker

Background: Fungi have been known to cause a variety of respiratory conditions, ranging from mold- associated asthma to allergic bronchopulmonary mycosis and invasive disease. More recently some fungal species have been implicated in a non-asthmatic chronic cough syndrome. Case presentation: A 59-year-old male presented to the pulmonary clinic with chronic nonproductive cough. Workup included pulmonary function tests with methacholine challenge, sputum cultures, CT scans of the chest and therapeutic trial with proton pump inhibitors. Sputum cultures repeatedly showed Saccharomyces cerevisiae and patient had elevated specific IgA and IgG. Bronchoscopy was unremarkable, except for tracheal mucosa biopsies revealing acute and chronic inflammation. A one-month course of steroids provided temporary relief of chronic cough, but symptoms returned once steroids were discontinued. He also experienced temporary relief away from home. Upon further evaluation, the patient described his hobby of wine making which was believed to be the source of Saccharomyces cerevisiae. Once he stopped wine making at home and cleared his cellar, his symptoms stopped and have not returned since. Conclusion: We describe a rare presentation of non-asthmatic chronic cough associated with exposure to Saccharomyces cerevisiae. This is the first report of fungi associated chronic cough without asthmatic features outside of Japan and the first one associated with Saccharomyces cerevisiae. This report provides further evidence linking fungi with chronic cough syndrome without the features of asthma or allergic bronchopulmonary mycosis

Severe metabolic alkalosis–a diagnostic dilemma

Background: Cushing's syndrome due to ectopic ACTH secretion has been associated with many cancers; most commonly small cell carcinoma of the lung and bronchial carcinoid tumors. Usually, patients who confer this diagnosis have poor prognosis. Case presentation: A 66-year-old female presented with worsening shortness of breath and weakness over three days. Initial laboratory derangements included severe hypokalemia and metabolic alkalosis. Treatment included high amounts of potassium chloride and acetazolamide. Imaging studies revealed anterior medial right upper lobe lung mass as well as suspicion for many liver metastases. Liver biopsy was sought and was positive for small cell carcinoma. Conclusion: We describe a case of severe metabolic alkalosis and hypokalemia in a patient with Cushing's syndrome due to ectopic ACTH secretion from small cell lung cancer. To our knowledge, this is the first case identified which exhibited such significant metabolic derangements in the form of serum and arterial blood bicarbonate. As prognosis is quite poor, we recommend swift diagnosis and management