An efficient preparation and some reactions of 2-dimethylaminomethylene-1,3-bis(dimethylimonio)propane diperchlorate

An alternative preparation of 2-dimethylaminomethylene-1,3-bis(dimethylimonio)propane diperchlorate from malonic acid is described along with its application to the synthesis of 2,4,6-trisubstituted phenols and 2-(N-(2,2-diformylethenyl)amino)pyridine.     

Finite difference approximate solutions for the Cahn‐Hilliard equation

In this article, we analyze a Crank‐Nicolson‐type finite difference scheme for the nonlinear evolutionary Cahn‐Hilliard equation. We prove existence, uniqueness and convergence of the difference solution. An iterative algorithm for the difference scheme is given and its convergence is proved. A linearized difference scheme is presented, which is also second‐order convergent. Finally a new difference method possess a Lyapunov function is presented. © 2006 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 23: 437–455, 2007     

Detection of sulfur in soil samples using 2.5 MeV neutron activation

Journal of Radioanalytical and Nuclear Chemistry - Sulfur concentrations in soil samples containing 4.4–13.47 wt% sulphur were measured in neutron inelastic scattering using dc beams...