Selenium

Views:
 
     
 

Presentation Description

Selenium and Health

Comments

Presentation Transcript

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 1

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 2

General properties: 

General properties Appearance : Black and red allotropes Number of selenium in Periodic table: 34 Element category: nonmetal Standard atomic weight: 78.96 Phase: solid Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 3

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 4 History : Selenium was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1817 after analyzing an impurity that was contaminating the sulfuric acid (H 2 SO 4 ) being produced at a particular factory in Sweden . 1779-1848 History

PowerPoint Presentation: 

Black, grey and red Diferent kinds of Se Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 5 Different kinds of Se

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 6 Selenium : End of uses

PowerPoint Presentation: 

Different biological forms of Se Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 7 Glutathione peroxidase Selenocysteine Selenomethionine 2 GSH + H2O2----GSH-Px → GSSG + 2 H2O

Selenium for health: 

Selenium for health Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 8

Selenium and cancer: 

Selenium and cancer Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 9

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 10

PowerPoint Presentation: 

Where ? How much ? Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 11 Selenium : Where ? How much ?

PowerPoint Presentation: 

For human beings : Maximum : 400 µg/ day . Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 12

PowerPoint Presentation: 

Diferent forms of Se Selenomethionine Amino acid containig selenium Cannot be synthesized by humans Incorporation of selenomethionine into tissue proteins causes Alkali disease Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 13

PowerPoint Presentation: 

Selenocysteine Diferent forms of Se Selenomethionine Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 14

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 15

PowerPoint Presentation: 

Audrey SOMMACAL and Andrey GRISHIN | Ecole des Mines de Saint-Etienne | English presentation about Se 16