... extremely small fraction of the molecules present!Let us allow instead extremely effective turbulence, and suggest that the small-est scale of turbulence in our gas system is about (l t= 0.1 ... Thematerial leaving the systems at any time will have a time-dependent distribution of residence time. Analytical and numerical solutions are possible for a variable-volume CSTR, allowing calculation ... encouragement of the first president of NAMF, JamesY. Oldshue, and indeed of all the presidents of NAMF, both past and current, isalso gratefully acknowledged. Finally, the work of our editorial assistant,...