Experiments on starch protein and fat 2

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EXPERIMENTAL BIOLOGY

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Experiments on starch protein and fat 2

Transcript of Experiments on starch protein and fat 2

Page 1: Experiments on starch protein and fat 2

EXPERIMENTAL BIOLOGY

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• Starch is a white, amorphous substance, tasteless, insoluble in cold water and ethanol.

• Starch is a reserve material of the plant, is mainly in the seeds.

• Starch as a reserve material is also stored in the fruit and storage organs.

• Starch is used in the textile, cosmetic, pharmaceutical, spirits.

WHAT IS STARCH?

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Starch can be detected by means of iodine or Lugol's solution, which contains iodine.

Under the influence of iodine starch adopt a blue-violet color.

DETECTION OF STARCHDIFFERENT PRODUCTS

c

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THE FIRST EXPERIMENT

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In boiled rice, noodles, white cheese, bread, potato flour Lugol's solution color changed from orange to dark blue.

In washing powder, white soap and white material lugol's solution didn’t change color.

RESULTS

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There is starch in boiled rice, noodles, white cheese, bread, flour. .

There is no starch in washing powder, white soap and white material.

CONCLUSIONS

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WHAT IS PROTEIN?

• Proteins are macromolecules are composed of amino acids.

• Proteins are the basic building blocks of all tissues of the human body, and many compounds such as

enzymes, hormones, antibodies.

• Proteins regulate metabolism and many body functions, ensuring correct the condition and functioning of our body.

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1) biuret reaction – a food product is treated by mixture VI cupric sulfate and potassium hydroxide in the presence of proteins which are stained purple; reakcja ta służy do wykrywania wiązań peptydowych

2) reakcja ksantoproteinowa - polega na działaniu na produkt stężonym kwasem azotowym (V); reakcja ta znajduje zastosowanie przy wykrywaniu białek posiadających pierścienie aromatyczne

DETECTION OF PROTEIN

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THE SECOND EXPERIMENT

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In biuret reaction tested product changed its colour from blue on purple.

RESULTS

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There are some proteins in eggs.

CONCLUSIONS

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REAKCJA KSANTOPROTEINOWA

Fruits:

Kiwi

Banan

Jabłko

JoghurtMilk

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W reakcji z kwasem azotowym (V): - mleko i jogurt przybrały żółtą barwę

- kiwi, banan oraz jabłko nie zmieniły koloru

RESULTS

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1. W nabiale zidentyfikowano białka o budowie aromatycznej.

2. Owoce nie zawierają białek lub ich wykrycie tą metodą jest niemożliwe, np. ze względu na niską czułość metody lub brak białek zawierających pierścienie aromatyczne.

CONCLUSIONS

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WYKRYWANIE TŁUSZCZÓWW ŻYWNOŚCI

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METHOD

1.Rozetrzeć badany produkt w papierowej serwetce.

2.Obejrzeć serwetkę, trzymając ja pod światło. Jeśli zostały na niej tłuste plamy, oznacza to, że pokarm zawiera tłuszcz.

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MATERIAL

Almonds

Walnut

Sunflower

Apple

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RESULTS

walnutssunflower

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RESULTS

applealmonds

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Z nasion słonecznika powstała największa tłusta plama na serwetce, co sugeruje największą ilość tłuszczy w tym produkcie.

Jabłko zrobiło mokrą plamę na serwetce a nie tłustą, co świadczy, że tą techniką tłuszczy nie wykryto.

RESULTS AND CONCLUSIONS