AIM Lymphocytic infiltration in the portal triads usually conceals the detection--in haematoxylin and eosin (H&E) stained sections--of bile ducts in two liver diseases: chronic hepatitis and primary biliary cirrhosis. The aim was to assess the number and the characteristics of the bile ducts in those diseases with the aid of an antibody to cytokeratin 7 (CK7). METHODS Consecutive sections fro...

We used pharmacological methods to test the hypothesis that female Dermacentor variabilis salivary ducts dilated when dopamine-stimulated and that dilation was nitric oxide-mediated. Stimulation with dopamine resulted in an increased diameter (19.7%) compared to unstimulated ducts (P<0.005). Pretreatment with L-NAME, an inhibitor of nitric oxide synthase, or cytochalasin D abolished the dilatio...

The Galerkin weighted residuals method is extended solve the laminar, fully developed flow and heat transfer of Al2O3-water nanofluid inside polygonal ducts with round corners for the constant heat flux and uniform wall temperature boundary conditions. Using the method, semi-analytical, closed-form solutions are obtained for the friction coefficient and the Nusselt number in terms of the radius...

Direct numerical simulations (DNSs) of spatially developing thermal turbulent boundary layers over angle-ribbed walls were performed. Four rib angles (γ=90°,60°,45° and 30°) examined. It was found that the 45° ribs produced highest drag coefficient, whereas 30° most improved Stanton number. In comparison to transverse case, streamwise velocity dimensionless temperature in V-shaped cases signifi...

The support system is the most important part of foundation pit engineering, which mainly determines safety engineering. Based on characteristics Changsha international financial center, original pile-anchor-beam (PAB) improved into a new form system, pile-anchor-ribbed-beam (PARB) system. This study establishes numerical simulation model to calculate surface settlement and deformation retainin...

OBJECTIVE The objective of the present study was to investigate the histological structure of goose pancreatic ducts. DESIGN Tissue samples from the lobes and ducts of the pancreas were dissected under deep ether anesthesia. INTERVENTIONS Sections were stained using Crossmon's connective tissue method for general observations and Gomori's method for pancreatic islet cells. RESULTS The gla...

The object of this study is to characterize the aero-thermal performance of a rectangular turbine blade cooling channel for gas turbines equipped with turbulence promoters, square section ribs, inclined at 45 degrees with respect to the main flow direction. With this aim, a P.I.V investigation of the flow field within an inter-rib space inside four cooling channel models has been done. The pres...