Abstract Background Malignant acanthosis nigricans (MAN), characterized by the presence of a hyperpigmented, velvety cutaneous thickening, is recognized as a cutaneous sign of internal Men Care malignancy.Few MAN has been reported in the Asian race ever before.Case presentation Here, we report a rare case of MAN with severe mucosa and soles and ext
Among the educational levels, high school is of special importance, because at this point in time, in addition to entering a new level, students are at a new stage in terms of emotional, moral and social development.Among high school courses, Persian literature course is of special importance; Because literature is the spectrum of all our learning
A new analytical model of a logarithmic sprag clutch considering profile modification is proposed to reflect the effect of profile parameters on the dynamic contact pressure distribution during the engagement, especially the edge stress of a sprag roller.In the model, a nonlinear iteration method of normal force including the logarithmic profile mo
Abstract Background The clinical diagnosis and treatment of dilation of the cholangiopancreatic duct in patients with ambiguous ampullary disease, termed unexplained dilation of the cholangiopancreatic duct (UDCD), is commonly difficult.This study aimed to evaluate the applicability of transduodenal ampullectomy (TDA) for the diagnosis and treatmen
Background: Since sponge iron is the main feed of steel furnaces for the production of crude steel, especially VTX in electric arc furnaces, the production of quality sponge iron is one of the concerns of the steel industry.The reduction process, which is the conversion of pellets into sponge iron using reduction gases, has been used in Iran for ma