Innovative Immobilization Matrices.

We present a brief survey of some of the recent work of Professor Luis E. Díaz, performed together with his students and collaborators at the University of Buenos Aires. Dr Luis E.

Psychological and physiological response of students to different types of stress management programs.

Purpose: To design, implement, and examine the psychoneuroendocrine responses of three different types of stress management programs.

Design: Randomly assigned. A pre/post experimental design comparing variables between three different programs and a control group.

Determination of aristolochic acids by capillary electrophoresis.

A method for the separation and quantification of aristolochic acids by capillary electrophoresis is described. Buffer solutions composed of sodium dihydrogen phosphate, sodium borate, and sodium dodecyl sulfate at pH 6.5-7 were found to be suitable for the separation of aristolochic acids, which can be well resolved in a few minutes.