skip to primary navigationskip to content
 

Flexible Chocolate

An interactive public lecture 

I think it was Dawn French who said "There are two types of people - those who like chocolate and those who lie". Everyone likes chocolate and the bendy chocolate lecture on Saturday 13 March 1999 filled the Babbage lecture theatre to capacity - that's around 300 people. It was presented by Dr Malcolm Mackley and Robert Marshall from the University of Cambridge, Department of Chemical Engineering.

chocolate The lecture was intended for everyone aged 12 or over, though there were some smaller children there too, and they enjoyed the messier experiments.

Malcolm and Robert began with a description of what chocolate is and where it comes from, which was the cue for a large globe to be rolled down the aisle.
choccie Then, after a short discussion of the physics and chemistry of chocolate, they got on to the experiments. Volunteers who helped with experiments were given Easter eggs and almost every child in the audience wanted to be a volunteer. The first "victim" demonstrated the melting point of chocolate by sucking a probe coated in chocolate. A large screen showed the temperature in her mouth


chocchocgoo

The messiest experiment showed the traditional way of making chocolate into shapes. That is, you melt it, pour it into moulds and wait for it to cool down and set. At the end of the lecture, this mess still hadn't cooled enough to be turned out of the mould.

mrmchoc

The new way of making chocolate into interesting shapes is to extrude it. This toy shows the idea of extruding - in this case squirting plasticene through a small hole.

choc More volunteers then helped to work the machine that makes real bendy chocolate

and this is bendy chocolate....

knotted

 

 

 

RSS Feed Latest news

Dr Janire Saez awarded Marie Curie Fellowship

Jun 14, 2019

Dr Janire Saez awarded Marie Curie Fellowship for her work on organ-on-chip devices for cancer research.

Senior academic promotions in the department

Jun 13, 2019

Dr Bart Hallmark has been promoted to University Senior Lecturer, and Dr Ljiljana Fruk and Dr Andy Sederman both promoted to Personal Readerships.

Design Project winners 2019

Jun 10, 2019

Congratulations to the two winning groups of our 2019 Design Project on "the processing of sour North Sea gas".

View all news

Upcoming events

CAS Consultancy talk: Assembly Effect with Troika

Jun 19, 2019

Department of Chemical Engineering & Biotechnology (Atrium) Philippa Fawcett Drive Cambridge, CB3 0AS

CEB Research Conference 2019

Jun 25, 2019

Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS

Africans in STEM Symposium

Jun 28, 2019

Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS

Machine learning and AI in (bio)chemical engineering

Jul 08, 2019

Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS

Upcoming events