• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Aim: To produce a basic yeast leavened straight dough by kneading and proofing.

Extracts from this document...

Introduction

Expt 1A dough formation Aim: To produce a basic yeast leavened straight dough by kneading and proofing. Principle: A basic yeast leavened straight dough can be prepare by mixing hard flour, wheat flour, sucrose, salt, active dried yeast culture, then add butter and fully mixed in the butter. Then water is added. By kneading the dough, a smooth elastic consistency is formed. The elasticity is developed because the gluten is rearranged. Lastly, place the well-kneaded dough in a warm oven to let the dough proof. Result: The dough had rise. It risen to about twice its origin volume. Discussion: The ingredient can influence dough rising. Sucrose carry out the glucose fermentation, the salt support the fermentation by yeast and the water helps to activate the dried yeast culture. Carbon dioxide is produced as the product of fermentation. The carbon dioxide is trapped inside the dough. Once the dough is put into a warm oven the higher temperature will cause an expansion of gas inside dough, result in a size increase. ...read more.

Middle

So there are air bubbles in the interior of bread, making it spongy. The dough had expanded again during baking. It not only causes by expanded of carbon dioxide in dough. More important, it is due to the baking temperature is 200�C exceed the boiling point of water i.e. 100�C, so the water content in dough had changed from liquids to gaseous state(form steam). Gas occupy a large area than liquid causing the dough to rise again. Expt 2 Browning reaction Aim: To investigate the ingredients that is necessary for a browning reaction. Principle: By mixing solution according to following table. Tube 1 2 3 4 Glucose solution ml 0 4 0 4 Glycine solution ml 0 0 4 4 Water ml 8 4 4 0 And place the test tube in a 120 C hot oven for at least 1 hour. Observe whether browning of solution occurs. The component need in the browning reaction can be determine. As browning will not occur if anyone of these is missing. ...read more.

Conclusion

Discussion: In the same baking powder content, sample A rise more than sample B. showing that hard flour has a greater effect on expansion. With same flour used, the increase in content in baking powder, the sample will rise greater. Hard flour has a higher gluten content than soft flour.The dough using hard flour can rise bigger because the gluten in the flour forms an elastic network which traps the carbon dioxide gas given off by the yeast more effectively. The more gluten, the greater the bread dough's tendency to rise. The baking powder has a function of releasing carbon dioxide into dough. With more baking powder used more carbon dioxide is release . As the carbon dioxide will expand at high temperature, the dough will rise. The chemical leavening agent used to increase the volume and lighten the texture. The agent works by releasing carbon dioxide into dough through and acid base reaction. Take a common baking powder(baking soda) as an example, its reaction is : Chemical leavening agent is commonly used instead of yeast to generate carbon dioxide. It is because carbon dioxide is released in a faster rate through acid base reaction than fermentation. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Food Technology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Food Technology essays

  1. heal and social unit 2

    This means that they will also be fit and healthy. They would have less chance of getting cancer and other types of dieses. Mr David smokes because he is stressed out and because of his wife cheated on him. This means if Mr David stops smoking he will be in

  2. Open and produce a marketing plan for a new restaurant.

    The interior d�cor also very important for customers to feel comfortable. Competitor After research, there was a lot of high class and median class of restaurants such as Malay, Chinese, Indian, Japanese, Italy and etc. The main competitor will be The Ship because the strategy and the process is a bit same with The Plane.

  1. A topic was given to everyone in the class based on the subject 'Abnormal' ...

    Anorexia Nervosa can include the following symptoms: depression, irritability, withdrawal and peculiar behavior Causes 2. Causes Eating disorders is very complex problem caused by a number of factors the exact cause is unknown however it could be due to family and cultural pressures for the trapped person this could be their only way of controlling their life.

  2. Omelettes come in many different styles and forms, so here is a basic omelette ...

    Now that's done, you can heat the frying pan, add a small amount of cooking oil, and melt in some butter. When the frying pan is warm, add the mixture, and wait. Using a plastic spatula loosen the edges, and watch it cook until just before the last of the mixture at the top becomes dried out.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work