Through his mediation she was invited in 1898 to spend several months doing research in the laboratory of Hugo de Vries, who had just been appointed adjunct professor of plant physiology at the newly founded University of Amsterdam.

[1] In 1901 she was the first woman in the Netherlands to be awarded a scholarship from the Buitenzorg Fund to conduct botanic research in Java, one of the few to achieve this without being a doctoral student.

However, her poor health prevented her from travelling to the Far East and Moll offered her an unpaid place in his laboratory instead.

In Die Periodicität morphologischer Erscheinungen bei den Pflanzen[5] (The frequency of morphological phenomena in plants) she was one of the first Dutch scientists to report on variability, evolution and genetics.

She was also active in the Dutch Association of Women In Higher Education (Vereniging van Vrouwen met Hogere Opleiding or VVAO) and an outspoken opponent of the principle of eugenics.