The article here is somewhat like the second part of the Miller experiment that you linked. (Don't take the "second part" too literally.)
In the Miller experiment (and the dozens/hundreds variants) the main idea is how to obtain organic molecules mixing some common inorganic molecules and using a energy source like a spark or something. In the Miller experiment you can build some "soup" of the amino acids and other stuff.
The experiment in the article is about how to use the evaporation of the "soup" to make the amino acid to form small chains that are like small proteins. So it's somewhat like the part two of the Miller experiment. In this particular experiment they analyzed which amino acids are more prone to form small chains/proteins.
In the Miller experiment (and the dozens/hundreds variants) the main idea is how to obtain organic molecules mixing some common inorganic molecules and using a energy source like a spark or something. In the Miller experiment you can build some "soup" of the amino acids and other stuff.
The experiment in the article is about how to use the evaporation of the "soup" to make the amino acid to form small chains that are like small proteins. So it's somewhat like the part two of the Miller experiment. In this particular experiment they analyzed which amino acids are more prone to form small chains/proteins.