Seven patients with typical or atypical pulmonary carcinoid tumors overdiagnosed as small-cell carcinoma on bronchoscopic biopsies are described. Bronchial biopsies from 9 consecutive small-cell lung carcinoma patients were used as control group for histologic and immunohistochemical studies (cytokeratins, chromogranin A, synaptophysin, Ki-67 [MIB-1], and TTF-1). The carcinoid tumors presented ...

as the science of mechanics has been improved in recent years, different standards have been created in designing structures such as pressure vessels. most of these standards have been developed by means of experience and examination. today, most of researches, proceed the numerical analysis of the different elements of the pressure vessels and somehow they have put some questions on the previo...

Weld type between parts will make a difference on structural performance, which is especially important for daouble-walled shell. To get clear this problem, numerical simulation conducted to investigate the influence of weld plans frame and out shell stress stability. Numerical results show that change plan small in case 15MPa external pressure, below critical value, ultimate bearing capacity c...