Most Popular in Testing
- Ranking Body Creams by Sensory Properties
- New Sunscreen Allows Body to Produce Vitamin D
- Preservative Efficacy Testing: Accelerating the Process
- Photostability Test for Additional Sunscreen Claims, Part I: Protocol Setup
- Evaluating 1,3-Propanediol for Potential Skin Effects
- Photostability Test for Additional Sunscreen Claims, Part III: New Claim
- Measuring Hair Strength, Part I: Stress-Strain Curves
- Zeta Potential and Particle Size to Predict Emulsion Stability
- Yield Stress Measurements for Personal Care Part II: Methods
- Photostability Test for Additional Sunscreen Claims, Part II: Calculations and Results
Recent in Testing (page 20 of 31)
Mar 30, 2010 | Sara Farahmand, PhD, University of Cincinnati College of Pharmacy; and Howard I. Maibach, MD, PhD, University of California School of Medicine
While previous algorithms for predicting the skin absorption of permeants was based on in vitro data, the present article proposes a quantitative structure-activity relationship (QSAR) model based on in vivo human data. Here, a set of human in vivo data is described that provides entry into predicting the penetration of cosmetic ingredients.
Mar 16, 2010 | Johann W. Wiechers, PhD, JW Solutions
Six questions from Michael Shermer’s Baloney Detection Kit have been discussed in this series. The results were not flattering for cosmetic science (read: cosmetic scientists) but cosmetic science did not score badly on all points. Questions seven and eight, described here, discriminate true science from borderland science and non-science or nonsense.
Feb 26, 2010 | Ali Alikhan, MD, and Howard I. Maibach, MD
In this article, several methods to quantify the protein collected by tape stripping are described, including traditional gravimetric methods as well as novel colorimetric and visible spectroscopic techniques. Further, one colorimetric method is described to effectively determine the keratolytic efficacy of various materials in vivo, suggesting additional roles for this method.
Feb 26, 2010 | Katie Schaefer, Cosmetics & Toiletries magazine
The Hurel Corp. has developed a microfluidic, non-animal alternative to the LLNA and it has partnered with L’Oréal to make this approach a reality—in the form of a chip.
Jan 29, 2010 | Hongbo Zhai, MD, and Howard I. Maibach, MD, University of California San Francisco
New methodologies have recently been developed to determine antioxidant effects but they often require extensive training and are time-consuming to conduct. In the present article, however, the authors describe an in vitro method to detect the effects of antioxidant-containing formulations using photochemiluminescence to provide rapid, accurate and sensitive measurements.
Jan 22, 2010
A chip created by L'Oréal and Hurel Corp. is designed to replace the local lymph node assay, a test often performed on cosmetic raw materials. In addition to saving animals, the chip is also said to be less expensive than animal testing. Hurel developed the working microfluidic portion of the chip.
Oct 26, 2009
A new software platform has been designed to improve the efficiency and effectiveness of chemical and materials research to increase research productivity and decrease time-to-innovation.
Oct 20, 2009
BD Biosciences is hosting a webinar dedicated to cell-based assays. Elizabeth Abraham, PhD, a research scientist at BD Biosciences, will discuss the applications for the company's BD PureCoat surfaces.
Oct 13, 2009 | Johann W. Wiechers, PhD, JW Solutions
Following positive feedback from a previous column on the placebo effect, Wiechers readdresses clinical study design in relation to cosmetic claim substantiation—this time discussing when to perform double-blind studies and when to perform single-blind studies.
Oct 9, 2009
The HairDX Genetic Test for Hair Loss, a genetic baldness test manufactured by HairDX LLC, is now available as a CE Marked product under the European In Vitro Diagnostic Directive.
Sep 1, 2009
Brookfield Engineering celebrates its 75th anniversary with the introduction of the Falling Ball Viscometer, an instrument to assess the dynamic viscosity of transparent Newtonian fluids.
Aug 28, 2009 | M. Pissavini, S. Marguerie, A. Dehais, L. Ferrero and L. Zastrow, Coty-Lancaster International
Here, the authors describe a variable that affects the results of SPF testing in vitro—the roughness parameter—and investigate this variable using standard and molded poly(methyl methacrylate) (PMMA) substrates. They conclude that use of a molded substrate, along with the described control chart, improves the reproducibility of in vitro SPF test results.
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Between The Covers Discover:
- Amino acid distribution and biochemistry
- Examination of strength and anti-breakage product claims
- Hair: growth cycle, heat protection, shine, and color intensity and retention
- Overview of shampoos and issues relating to surfactants
- Science of hair color including chemical reactions and formulations
- Ethnic differences in hair and absorption of materials
- Evaluate and quantify visual properties of hair
- Dandruff-Causes and biology of the condition
- Hair styling products and polymers
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