There is an increasing interest in new strategies to determine as well as assessment of drugs in medical and pharmaceutical sciences. Herein we describe a simple, rapid, sensitive, and selective spectrophotometric method for determination of labetalol (LBT) hydrochloride based on the oxidation of the drug with ferric ammonium sulphate that yields a green colored product. The increase in absorba...

We study a shadow limit (the infinite diffusion coefficient-limit) of a system of ODEs coupled with a semilinear heat equation in a bounded domain with Neumann boundary conditions. In the literature, it was established formally that in the limit, the original semilinear heat equation reduces to an ODE involving the space averages of the solution to the semilinear heat equation and of the nonlin...

Function-based Systems Engineering (FuSE) is a design method that uses functional modeling throughout the first three phases of engineering design: product planning, conceptual design and embodiment design. The objective of the method is to implement existing and newly developed functional modeling based tools throughout the design of systems. Specific improvements over current design methods i...

Motivated by problems in equivariant dynamics and connection selection in heteroclinic networks, Ashwin and Field investigated the product of planar dynamics where one at least of the factors was a planar homoclinic attractor. However, they were only able to obtain partial results in the case of a product of two planar homoclinic attractors. We give general results for the product of planar hom...

A new method of background subtraction is presented which uses the concept of a signal estimator to construct a confidence level which is always conservative and which is never better than e. The new method yields stronger exclusions than the Bayesian method with a flat prior distribution. (Submitted to Nuclear Instruments and Methods A.) Corresponding address: CERN/EP Division, 1211 Geneva 23,...

Developments in the study of logical limit laws for both labelled and unlabelled structures, based on the methods of Compton (1987/1989), are surveyed, and a sandwich theorem is proved for multiplicative systems.

We conjecture that the Sen–Seiberg limit of the Type IIA D2–brane action in a flat spacetime background can be resummed, at all orders in α′, to define an associative star product on the membrane. This star product can be independently constrained from the equivalent Matrix theory description of the corresponding M2–brane, by carefully analyzing the known BPS conditions. Higher derivative corre...