Radium watch hands

Radium watch hands

The old luminous watch hands in a bag, contains copper doped zinc sulfide paint with very small quantities of a radium salt, which is radioactive giving a marked response with a Russian.

test Introduction to Chemistry

Introduction to ChemistryIntroduction to Chemistry

Self healing hydrogels and its industrial applications

Hydrogels are water-swollen, cross-linked polymeric structures produced by reactions of monomers or by hydrogen bonding. This hydrogels used in various applications .

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