Экспериментальные исследования процессов миграции водорода в титане электрическими методами

В работе исследован процесс диффузионного переноса водорода в титановой пластине вихретоковым методом по глубине образца. Интегральный перенос изучен методом измерения термоэдс. Разработана установка для исследования процесса миграции водорода в сплаве титана при его насыщении электролитически в присутствии тиокарбомида. Исследована роль тиокарбамида. Проведено измерение вихревых токов по координате и во времени на различных частотах, что позволяет исследовать процессы миграции на разных глубинах образца. Исследован процесс миграции водорода в титановом сплаве методом измерения термоэдс.The process of diffusion transport of hydrogen in a titanium plate by the eddy current method has been investigated in the depth of samples. The integral transport has been studied by measuring thermoelectric powers. An installation was developed for studying the process of hydrogen shift in titanium alloys when electrolytically saturated with thiocarbomide. The role of thiourea is investigated. The measurement of eddy currents in coordinate and time is carried out at different frequencies, which makes it is possible to study the shift processes at different depths of the sample. The process of hydrogen shift in titanium alloys is studied by measuring thermoelectric powers

Telaprevir for Previously Treated Chronic HCV Infection

Cellular mechanisms in basic and clinical gastroenterology and hepatolog

Risk factors and outcomes associated with recurrent autoimmune hepatitis following liver transplantation

Background & Aims: Autoimmune hepatitis can recur after liver transplantation (LT), though the impact of recurrence on patient and graft survival has not been well characterized. We evaluated a large, international, multicenter cohort to identify the probability and risk factors associated with recurrent AIH and the association between recurrent disease and patient and graft survival.Methods: We included 736 patients (77% female, mean age 42 +/- 1 years) with AIH who underwent LT from January 1987 through June 2020, among 33 centers in North America, South America, Europe and Asia. Clinical data before and after LT, biochemical data within the first 12 months after LT, and immunosuppression after LT were analyzed to identify patients at higher risk of AIH recurrence based on histological diagnosis.Results: AIH recurred in 20% of patients after 5 years and 31% after 10 years. Age at LT <= 42 years (hazard ratio [HR] 3.15; 95% CI 1.22-8.16; p = 0.02), use of mycophenolate mofetil post-LT (HR 3.06; 95% CI 1.39-6.73; p = 0.005), donor and recipient sex mismatch (HR 2.57; 95% CI 1.39-4.76; p = 0.003) and high IgG pre-LT (HR 1.04; 95% CI 1.01-1.06; p = 0.004) were associated with higher risk of AIH recurrence after adjusting for other confounders. In multivariate Cox regression, recurrent AIH (as a time-dependent covariate) was significantly associated with graft loss (HR 10.79, 95% CI 5.37-21.66, p <0.001) and death (HR 2.53, 95% CI 1.48-4.33, p = 0.001).Conclusion: Recurrence of AIH following transplant is frequent and is associated with younger age at LT, use of mycophenolate mofetil post-LT, sex mismatch and high IgG pre-LT. We demonstrate an association between disease recurrence and impaired graft and overall survival in patients with AIH, highlighting the importance of ongoing efforts to better characterize, prevent and treat recurrent AIH.Lay summary: Recurrent autoimmune hepatitis following liver transplant is frequent and is associated with some recipient features and the type of immunosuppressive medications use. Recurrent autoimmune hepatitis negatively affects outcomes after liver transplantation. Thus, improved measures are required to prevent and treat this condition. (C) 2022 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.Cellular mechanisms in basic and clinical gastroenterology and hepatolog