• Gas-phase transport in mixtures emerged as a core theme: systematic measurement of friction (viscosity), heat conduction, and diffusion in H2-containing gas mixtures, binary/ternary systems, and pure gases to derive transport relationships [1], [2], [3], [5], [8], [19].

• Theoretical and experimental exploration of thermal diffusion and isotope separation, linking thermal diffusion coefficients to viscosity data and developing isotope theories; shows isotope separation by thermal diffusion (1939) and subsequent refinements [7], [12], [14], [20].

• Thermophysical properties supporting heat transfer analyses: measurements and models of viscosities, thermal conductivities, and heat capacities under varying temperature and pressure, across liquids and gases, forming a foundation for thermal transport studies [4], [9], [10], [11], [15], [17], [18].