The Chorella experiment studied the growth of algae cultures in a nutrient medium, and an oxymeter was used to study the concentrations of oxygen in human tissue in weightlessness.

The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about […] offering services that let you […] share the things you love with the world and so on. But the real way to build a successful online business is to be better than your rivals at undermining people's control of their own attention.

However, the application of thermoanalytic methods is limited to substances having a start temperature of evaporation at atmospheric pressure not far below 200 °C. Otherwise there is the risk that evaporation in the gas flow will begin at room temperature and thus the correct start temperature of evaporation (zero point of the TGA curve) cannot be ascertained.

One yangban, Yi Sŭng-hun, provided a new answer to this crisis of authority: while in Beijing serving as a diplomat, he was baptized a Catholic Christian and went home to propagate his faith.