Where did the colours come from?

Wei Xie, Sung Won Park, Mu Zhou, Yijia Guan & Paul Henckel-Ojo

Studenteropgave: Semesterprojekt


In this report, our group’s focus is on the colour of flowers. The questions are “What are the properties of colours in plants? 1) Are the colours only depending on one single pigment or are they continuously depending on different factors in the plant? Are the pigments stable? Can we change the colour of a pigment and then rewind the process without causing any damage to its structure?” We did experiments to get the answers, Our group used Primula(red/green colours, mature plant), Hybrid Tea Roses(red, dry flowers), Hibiscus Sabdariffa(red, dry flowers) to do our experiment, extract the pigment from the flower first, then we extract the chlorophyll from the leaves, and then extract anthocyanin from the pigment, extract the carotene from the carrots. then do the experiments on them. About the analysis, we used two methods, one of the methods was TLC another one was Spectrophotometry, analysis the results show on the figure we get. After the study of the pigments in flowers, we want to know more about the colours around us. What are the properties of colours in general? What is the nature of the coloured objects that we encounter in our daily lives? We choose the dyes, the rainbow, the paint on bikes to continue our study, and answer those questions. Overall we can say to have gained wide knowledge of colours by doing this project.

UddannelserBasis - International Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Basis
Udgivelsesdato1 jun. 2006


  • colour
  • flowers
  • anthocyanins
  • general background
  • TLC
  • coloursensations