Презентация к уроку английского языка "Starch and modified strach" - скачать

Август 25, 2022

Главная
Английский язык
Презентация к уроку английского языка "Starch and modified strach" - скачать

Содержание

2. The aim of my research work is to explain the presence of modified starch in food
3. Starch is a polymer based on glucose. Starch is a carbohydrate consisting of a large number
4. Name The word “starch” is derived from Middle English sterchen, meaning to stiffen.
5. Wheat starch paste was used in Ancient Egypt possibly to glue papyrus (first described in History
6. 6CO2 + 6H2O → C6H12O6 + 6O2 nC6H12O6(глюкоза) → (C6H10O5)n + nH2O 6nCO2 + 5nH2O →
7. "Regulation of starch"
8. Products with the highest starch content in%
9. Food, in which the starch is thermally processed, too hard to digest and derive
10. Analysis of the labels ■ Products that contain potato starch:  «Pripravych" "Soup Alphabet"  «Pripravych"
11. Experiment № 1 "Preparation of starch at home" 1. Take 3 potatoes.
12. 2. Clean and peel them.
13. 3. Grate to obtain "mush"
14. 4. Then it should be washed in the water. To get a lot to overcome, the
15. 5. Repeat several times until the water in the glass will be clear. Ready starch should
16. Experiment № 2 "Identification of starch in foods" Potatoes - is best known source of starch.
17. Experiment № 3 "Preparation of starch glue" 1. Tablespoon of starch (flour) should dissolve in hot
18. The resulting application, glued starch paste
19. If to check all yogurts at the grocery store you will find modified corn starch. It
21. Скачать презентацию

Слайд 2

The aim of my research work is to explain the presence

of modified starch in food in which it shouldn’t.
Tasks of my research work are:
 find the theoretical material of starch and modified starch;
 analyze the label on the content of modified starch products;
 check the products, which often have the starch;
 prepare the starch at home.

Слайд 3

Starch is a polymer based on glucose. Starch is a carbohydrate

consisting of a large number of glucose. This polysaccharide is produced by all green plants as an energy store. It is the most common carbohydrate in the human diet and it is in potatoes, wheat, corn, and rice.
Pure starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol. It was invented by George Washington Carver. It consists of two types of molecules: the linear and helical amylose and the branched amylopectin. Depending on the plant, starch generally contains 20 to 25% amylose and 75 to 80% amylopectin.

STARCH

Слайд 4

Name
The word “starch” is derived from Middle English sterchen, meaning

to stiffen.

Слайд 5

Wheat starch paste was used in Ancient Egypt possibly to glue

papyrus (first described in History of Pliny the Elder around AD 77-79). Romans used it in cosmetic creams, to powder the hair and to thick sauces. Persians and Indians used it to make wheat halva. In China starch used in paper production, from 700 AD.

History

Слайд 6

6CO2 + 6H2O → C6H12O6 + 6O2
nC6H12O6(глюкоза) → (C6H10O5)n + nH2O
6nCO2

+ 5nH2O → (C6H10O5)n+ 6nO2

Biosynthesis

Carbon dioxide and water are converted into starch and oxigen

Слайд 7

"Regulation of starch"

Слайд 8

Products with the highest starch content in%

Слайд 9

Food, in which the starch is thermally processed, too hard to

digest and derive

Слайд 10

Analysis of the labels
■ Products that contain potato starch:
 «Pripravych" "Soup Alphabet"
 «Pripravych"

"Star Soup"

Products that contain modified starches:  Ketchup «Calve»  «Maggi»  Mayonnaise Maheev "  «Knor» dressing for chicken  «Aktual" dairy product  «Rolton" meat

■ Foods that contain wheat starch:
 Chips «Pringles»
 Bread Waffle "Elizoveta"

■ Products that contain corn starch:  «Maggi»

Слайд 11