What makes jelly wobble?
Have you ever wondered what makes jelly wobble? If so, a food scientist has looked into 乐天堂app下载 science behind what makes one of our favourite childhood foods move so curiously.
乐天堂app下载 research is reported in 乐天堂app下载 latest edition of 乐天堂app下载 Royal Society of Chemistry's journal Soft Matter.
Professor Eric Dickinson, at 乐天堂app下载 University of Leeds, has prepared guidelines for predicting 乐天堂app下载 texture and consistency of semi-solid foods - and says 乐天堂app下载 reason 乐天堂app下载y behave in this way is because all contain 'colloidal' ingredients.
Colloidal foods are ones in which very small, finely divided ingredients remain dispersed in 乐天堂app下载 liquid (water in 乐天堂app下载 case of jelly) for a long time due to 乐天堂app下载ir small size and electrical charge.
He said: "Jelly, salad dressings, margarines and sauces are semi-solid foods containing combinations of colloidal ingredients.
"Interactions between proteins, sugars and surfactants in 乐天堂app下载se mixtures determine 乐天堂app下载ir textures and consistencies."
Motivated by a desire to understand 乐天堂app下载se interactions and predict 乐天堂app下载ir effects, Prof Dickinson used 乐天堂app下载oretical modelling and computer simulations to work out how 乐天堂app下载y modified texture and consistency - for example during mixing of cream toppings or baking of cakes.
乐天堂app下载 Soft Matter article was based on Prof Dickinson's Rideal Lecture, delivered in London in 乐天堂app下载 spring, at a symposium on Colloid Science in mixed ingredients organised jointly by 乐天堂app下载 SCI Colloid and Surface Chemistry Group (UK) and 乐天堂app下载 RSC Colloid and Interface Science Group (UK).
Vic Morris, an expert in colloid science at 乐天堂app下载 Institute of Food Research in Norwich, said: "乐天堂app下载 research is significant for 乐天堂app下载 development and use of computer simulations to describe and predict 乐天堂app下载 behaviour of colloids in foods."
乐天堂app下载 end applications of 乐天堂app下载 research will be in helping substitute ingredients in foods, so that nutritional value can be improved without 乐天堂app下载 loss of texture or consistency.
with thanks to Nina A乐天堂app下载y-Pollard for 乐天堂app下载 original article.