Otto Hahn (1879-1968): pioneer in radiochemistry and discoverer of radiotherapeutic mesothorium.

An improved HPLC method for determination of colocynthin in colocynth

Background and objectives: Colocynthin is the major active secondary metabolite of colocynth, Citrullus colocynthis (L.) Schrad, which has been used in traditional and ethno medicine of many countries.  It could be considered as an active marker for quality control of colocynth and its herbal products. Analysis and standardization of colocynth and its herbal preparations are a critical...

Karl Landsteiner, the discoverer of the blood groups and a pioneer in the field of immunology. Biography of a Nobel Prize winner of the Vienna Medical School

Francis F. Maury, M.D. (1840 to 1879): an often forgotten pioneer in early American surgery.

Otto Cohnheim--the forgotten physiologist.

Who was Otto Cohnheim? It is no exaggeration to say that he was the man who laid the foundation of our present understanding of the absorption of protein digestion products and also protein metabolism-yet he remains forgotten. This is largely because he unfortunately became, like so many others, a victim of political enthusiasm. 1978 is the 25th anniversary of his death, a fitting time to try t...

A spectral method based on Hahn polynomials for solving weakly singular fractional order integro-differential equations

In this paper, we consider the discrete Hahn polynomials and investigate their application for numerical solutions of the fractional order integro-differential equations with weakly singular kernel .This paper presented the operational matrix of the fractional integration of Hahn polynomials for the first time. The main advantage of approximating a continuous function by Hahn polynomials is tha...