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Method Development/Validation

New in Method Development/Validation (page 8 of 200)

Aug 25, 2014 | 10:27 AM CDT

Improving the UV Exposure of Sunscreen During In vitro Testing

By: Sébastien Miksa, Dominique Lutz and Céline Guy…

In any sun protection evaluation method, an irradiation step is required to determine the photostability of the UV filters in a product. The aim of this study was to identify key parameters involved to improve this UV exposure. Here, the authors consider temperature at the substrate surface, air flow influence and beam uniformity during UV exposition.

Aug 25, 2014 | 09:33 AM CDT

An Approach to Develop Cosmetics for Multi-tonal Brazilian Skin

By: Doraci Aleixo Maciel, Dilene Foggi Bet, Edilso…

In Brazil, people have many different colored skin tones, and women often struggle to match makeup shades to their skin color. This paper describes an exploratory study of hundreds of volunteers that was conducted to understand Brazilian women's skin color, ultimately to develop a makeup line for this widely diverse market.

Aug 25, 2014 | 08:47 AM CDT

Skin Aging at the Functional Proteomics Level: Elastin as a Marker

By: Nava Dayan, PhD, Dr. Nava Dayan LLC; and Matth…

There is general agreement on elastin’s role in skin health, aging and appearance, but no method has yet elucidated how it degrades with aging when challenged by sun exposure or other means. This paper reviews two inconsistent theories in the literature, degradation and buildup, and highlights potential methods to marry the two. It also suggests proteomics as a method for further investigation.

Aug 22, 2014 | 11:57 AM CDT

Lysine Polypeptides for Dandruff Treatment

By: Derry K. Mercer, PhD, Lorna Miller, Jennifer R…

Dandruff remains a significant yet poorly served chronic scalp disorder for which more effective treatments are required. Here, lysine polypeptides are demonstrated in vitro and in vivo to effectively address the causative organism in dandruff, Malassezia spp., and provide a potential basis for new treatments to counteract this condition.

Aug 21, 2014 | 01:43 PM CDT

Photoprotection of TiO2 Using Propenoic Acid Esters

By: Robert S. Hu, Jean Zhang, Gary A. Neudahl and …

Titanium dioxide (TiO2) is known to be photocatalytically active. Even with surface modifications, it catalyzes the decomposition of organic materials and promotes the formation of reactive oxygen species. However, a particular propenoic acid ester is shown here to protect TiO2 from inducing such reactions, making it a more effective and safer UV filter.

Aug 21, 2014 | 01:21 PM CDT

Sustainable Ingredient Science: Fossilized Coral Powder

By: Giorgio Dell'Acqua, PhD

Coral powder has applications in cosmetics but its use has impacted the marine environment. Fossilized coral could provide a sustainable alternative for uses such as fillers, cleansing and whitening agents, astringents, sebum absorbers, or to supply trace minerals to skin. Its use as an exfoliant it particularly noteworthy as formulators seek natural alternatives to polyethylene beads.

Aug 21, 2014 | 12:39 PM CDT

Quantifying the Performance of Hair Styling Products—Part 2

By: Trefor Evans, PhD, TA Evans LLC

A previous article discussed traditional measurements to assess the properties of hair spray products. However, the properties of polymer films deposited by these products are not constant and can be altered by both formulation means and environmental conditions. This article highlights additional useful measurement techniques for characterizing these film properties.

Aug 20, 2014 | 11:51 AM CDT

Bio-Botanica Offers Its Botanical Extracts with DuPont's Zemea Propanediol

By: Katie Anderson

Through a partnership between Bio-Botanica and DuPont Tate & Lyle Bio Products, Bio-Botanica is now offering Zea Botanicals, a line of its naturally derived plant extracts that incorporate DuPont's Zemea propanedio

Aug 20, 2014 | 11:30 AM CDT

Coast Southwest Plans California Expansion for Increased Distribution

By: Katie Anderson

Coast Southwest has acquired an additional 33,107 ft2 office/warehouse at the company’s headquarters in Placentia, Calif., USA, and plans to use the space for increased distribution to meet a growing consumer demand.

Aug 20, 2014 | 10:21 AM CDT

BASF Micronized UV Filter Added to Annex VI of EU Cosmetics Regulation

By: Katie Anderson

BASF's Tinosorb A2B (INCI: Tris-biphenyl Triazine) has been added to Annex VI (the positive list) of the EU Cosmetics Regulation (EC) No. 1223/2009.