In vitro

Recent in In vitro (page 11 of 11)

Flexabrasion: A Method for Evaluating Hair Strength

Both bending and abrasion should be tested—along with extension—when evaluating hair strength, as the authors show in tests of a new active for increasing the strength of bleached hair.

Preservative Efficacy Testing of Aqueous Cosmetics and Drugs without Counting Colonies

A miniaturized system using broth enrichment followed by either streaking on agar or fluorescence treatments can eliminate colony counting in the linear regression method of preservative efficacy testing.

Literature and Patent Review: Analytical and Test Methodologies 1990-2000, Part I

From more than 40 technical sources published in the 1990s, the author reviews methodologies from measuring important variables such as hair condition, bioactivity and irritation of skin and eyes.

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