| 1 | Anticorrosion behavior of conversion coatings obtained from unbuffered cerium salts solutions on AA6061-T6显示文摘The anticorrosive properties of cerium based conversion coatings deposited on AA6061-T6 alloy by immersion in unbuffered cerium chloride and cerium nitrate solutions in the presence of hydrogen peroxide were investigated and characterized by potentiodynamic polarization(PDP) and electrochemical impedance spectroscopy(EIS) in 0.5 mol/L NaCl aqueous solution.The microstructure and chemicalcomposition of the protective films were examined by scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS).It was found that the best corrosion protection was afforded by the samples treated during 600 s in cerium chloride solution at pH values~5.5-4,showing higher amounts of cerium and polarization resistance values greater than 10 Ω m2.Moreover,an ennoblement of the corrosion potential and decreasing of the cathodic and anodic currents were obtained compared with the cerium nitrate solutions application.Thisbehavior was attributed to the influence of the deposition parameters such as type of the salt anion,i.e.,chelating effect and chaotropic characteristics,pH fluctuations in the conversion solution and deposition time. | KIYOTA Sayuri VALDEZ Benjamin STOYTCHEVA Margarita ZLATEV Roumen BASTIDAS Jose Maria | 2011 | Journal of Rare Earths2011，29，10： | 11 |
| 2 | Clinical outcomes and complications of single anastomosis duodenal-ileal bypass with sleeve gastrectomy:A 2-year follow-up study in Bogotá,Colombia显示文摘BACKGROUND The global prevalence of obesity has increased over the past 40 years,and bariatric surgery has proven to be the most effective therapy for long-term weight loss.Its principles are based on modifying the brain-gut axis by altering the gastrointestinal anatomy and affecting the function of gastrointestinal hormones,thereby modifying satiety signals.Single anastomosis duodeno-ileal bypass with sleeve gastrectomy(SADI-S)combines both techniques and has become an alternative to gastric bypass and biliopancreatic diversion procedures for treating severe obesity and associated metabolic diseases in selected patients.AIM To describe the outcomes and complications of SADI-S.METHODS We retrospectively analyzed the data of patients who underwent SADI-S laparoscopically at the Clínica Reina Sofía in Bogotá,Colombia.This study assessed the therapeutic effectiveness of SADI-S in terms of short-term preoperative clinical characteristics,postoperative complications,comorbidities,nutritional deficiencies,and intraoperative complications during a 2-year follow-up.RESULTS Sixty-one patients with a mean body mass index(BMI)of 50±7.1 kg/m2 underwent laparoscopic SADI-S.The mean operative time and hospital stays were 143.8±42 min and 2.3±0.8 d,respectively.The mean follow-up period was 18 mo,and the mean BMI decreased to 28.5±12.2 kg/m2.The excess BMI loss was 41.8%±13.5%,and the weight loss percentage was 81.1%±17.0%.Resolution of obesity-related comorbidities,including type 2 diabetes mellitus,hypertension,dyslipidemia,and obstructive sleep apnea,was achieved and defined as complete or partial remission.No intraoperative complications were observed.Short-term complications were observed in four(6.8%)patients.However,larger studies with longer follow-up periods are required to draw definitive conclusions.CONCLUSION SADI-S has a low intraoperative and postoperative complication rate and is effective for weight loss and improving obesity-related comorbidities,including hypertension,type 2 diabetes mellitus,dyslipidemia,and sleep apnea syndrome. | Andres Ospina Jaramillo Angie Carolina Riscanevo Bobadilla Mariana Ospina Espinosa Alvaro Valencia Humberto Jiménez Maria del Pilar Montilla Velásquez Maria Bastidas | 2023 | World Journal of Clinical Cases2023，11，21： | 0 |
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