We are pleased to announce the answers to last week's quiz

What Really Happened 2000 Days Ago

Fluorescent pH-Responsive Biosensor
Hydrogel sensor using a thioflavin T cross-linker

What Happened 2000 Days Ago?
Guess what happened and have the chance to win a book

Red-Emitting Carbon Dot Sensors
Carbon dots as real-time fluorescent sensors for toxic ammonia gas

Brushing Up On Cell Imaging
Bottlebrush polymers tipped with DNA bind large numbers of fluorophores

Working for the JCF – The Young Chemists’ Forum of the German Chemical Society
Members of the national board about the work and aims of the JCF and their personal motivations

Guess the Chemist (47)
Can you guess the famous scientist from the description?

Opioids in Well Water
Proof of anthropogenic tramadol in plants and environment of Cameroon

Darkening Colors in Van Gogh's Sunflowers?
Some, but not all, chrome yellow colors degrade over time, as revealed by spectroscopic investigation

Understanding Light-Induced DNA Damage
Ultrafast spectroscopy offers insight into both light damage and photodynamic therapy