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Objectives To evaluate predictive factors for false-negative diagnosis of percutaneous forceps biopsies in patients suspected of having a malignant biliary obstruction Methods Two hundred seventy one consecutive patients with obstructive jaundice underwent percutaneous forceps biopsy. In each patient, three to five specimens (mean, 3.5 specimens) were collected from the lesion. The final diagnosis...
A new three-stage gasifier consisting of an auger gasifier, a fluidized bed gasifier, and a tar-cracking zone was applied for the gasification of dried sewage sludge to obtain a high-quality producer gas with low levels of impurities (tar, NH3, and H2S). In the experiments, the effects of activated carbon (AC), equivalence ratio, the weight ratio of AC to fuel, and feed rate were investigated. In...
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