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Cosmetics case having structure of dual seal

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
250 KB
Volume
2008
Category
Article
ISSN
1350-4789

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✦ Synopsis

A cosmetics case having a dual sealing structure is designed to retain the volatile solvents in the cosmetic and hence ensure a longer life for the cosmetics. Both the foldable mirror and the lid, containing the make-up tools are sealed.

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## Abstract New armed‐monoaza‐12‐crown‐4 and armed‐monoaza‐15‐crown‐5 ethers having dual phenolic OH and pyridine nitrogen binding sites in a side arm were prepared by the Mannich reaction of __N__‐methoxymethyl‐monoazacrown ethers with 3‐hydroxypyridine. Complexation studies of these new hydroxypy