Case report of a very serious drinking water incident putting up to 50,000 inhabitants of a town near Bonn in North Rhine-Westphalia, Germany at risk. A concentrated solution of highly alkaline water by sodium hydroxide was accidentally washed into the town's drinking water at a pumping station and increased the pH-value of the water to 12. Residents who came into contact with the contaminated ...

An efficient concerted rotation algorithm for use in Monte Carlo statistical mechanics simulations is applied to fold three polypeptides, U(1-17)T9D, alpha(1), and trpzip2, which exhibit native beta-hairpin and alpha-helix folds. The method includes flexible bond and dihedral angles, and a Gaussian bias is applied with driver bond and dihedral angles to optimize the sampling efficiency. Solvati...

Address correspondence to [email protected] ABSTRACT A very simple strategy for preparing hierarchical inorganic nanostructures under ambient aqueous conditions is presented. The hierarchical inorganic nanomaterials were obtained by simply adding a highly concentrated solution of one reactant to a solution of another reactant with low concentration. No surface-capping molecules or structure-dire...

A non-uniform inflow caused by an elbow structure is one of the main reasons for low energy transformation efficiency a centrifugal pump. Prototype experiments pump are used to analyze rule characteristics under uniform and inflow. The increases hydraulic losses in reduce head operation efficiency. decreases 8% design flow condition. large eddy simulation with shear-modified viscosity model app...

We show that differences in the quality of labor relations across countries can help to explain cross-country differences in ownership concentration. Controlling for minority shareholder protection, countries in which labor relations are hostile tend to have more concentrated ownership than countries in which labor relations are cooperative. Union strength, labor regulation, and the political o...