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Recent in Testing (page 25 of 27)

Rapid Colorimetric Analysis of para-Phenylenediamine in Henna-based, Non-permanent Tattoo Color Mixtures

In some henna mixtures, para-phenylenediamine (PPD) has illegally been added and it is responsible for complications such as allergic contact dermatitis. While high-performance liquid chromatography has previously been used to detect PPD, a colorimetric method that is faster and portable, described here, has been developed. For product developers, this method can be used to evaluate henna plant extracts.

P&G Presents 'Omics' Findings in Acne, Male Grooming, Dandruff and Anti-aging

During the World Congress of Dermatology, Procter & Gamble Beauty and Grooming is presenting new findings in acne, male grooming, dandruff and anti-aging based on a broader "omics"—i.e., genomics, proteomics and metabolomics, research tool.

Benchmarking Study to Examine Shampoo, Conditioner Rinse Profiles

TRI/Princeton is offering a benchmarking study on the rinsing of shampoos and conditioners to allow manufacturers a lower cost option for product testing, as compared with individual tests.

Noninvasive Techniques for Anti-cellulite Product Efficacy Evaluation

Although cellulite is not considered a disease, it is a significant cosmetic problem for many post-adolescent women. Recent studies using new diagnostic techniques such as ultrasound imaging can define the cellulite-reducing efficacy of cosmetics. However, there is still a need to standardize and objectify the testing procedures and to find parameters to measure anti-cellulite efficacy.

Fluid Skin Imaging for Better Resolution

Noninvasive subcutaneous skin imaging is a tool sought for use by the medical, pharmaceutical and personal care industries, but techniques have been lacking due to resolution and speed constraints.

Software Launches to Formulate for Efficacy

As many formulators know, creating an efficacious cosmetic formulation can be problematic, which is why Johann Wiechers, PhD, is launching a new software platform based on his “Formulating for Efficacy” strategy.

Colipa and EU Kick-off Animal Alternative Initiative

Safety Evaluation Ultimately Replacing Animal Testing (SEURAT), a research initiative funded by the European Union's Health Programme and Colipa, has gotten underway with a kick-off meeting, held March 1-3, 2011, in Cascais, Portugal.

Interpretation of SPF In vivo Results: Analysis and Statistical Explanation

Methods for determining SPF in vivo are based on a biological response by human skin. To overcome intrinsic variation in these methods, large numbers of volunteers and statistics are required; however, these concepts are often poorly understood or worse, misinterpreted. This article discusses how these values should be interpreted and explains what they mean to formulators.

Adapting SPF Testing Methods for Mineral Sunscreen Density

A sunscreen layer’s thickness is critical to its SPF. However, current regulations specify a mass application rate for testing, rather than a volumetric application rate. This significantly underrates the SPF values of mineral sunscreens due to their higher densities since, compared with their relative organic counterparts, thinner films are being tested, as will be shown here.

Researcher Develops Probe for Non-invasive Below Skin Imaging

Jannick Rolland, PhD, an optics professor at the University of Rochester in New York, has developed an optical probe equipped with a liquid lens that takes images under the skin’s surface without the use of invasive procedures.

ICCVAM and NICEATM Hold Meeting on Endocrine Disruptor Test Method

ICCVAM and NICEATM will hold a peer review meeting on March 29-30, 2011, for an in vitro test method that determines if chemicals are endocrine disruptors.

A Review of Genomic Techniques in Cosmetics Testing

Genomics assists product developers in understanding the expression of specific genes and their relationship to particular skin attributes. This article reviews commonly used testing techniques, such as DNA microarray, RT-PCR, SAGE, northern blot and RNA sequencing, and describes their application in testing the effects of cosmetic ingredients and products on skin.

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