Recent in Testing (page 22 of 32)

Cutest Offers UVA Sunscreen Testing

Cutest Systems Ltd has installed a Labsphere UV-2000S sunscreen analyzer at the companies laboratories in Cardiff, Wales.

Evaluating Water Permeability and Occlusion in Wound Dressings and Topical Cosmetics

The present study uses an evaporimeter to measure the degree of water loss from in vitro skin samples covered by occlusive and semi-occlusive wound dressings to serve as a model for determining the effectiveness of occlusive cosmetic formulations. The purpose of this work was to develop a model for determining the effectiveness of occlusive cosmetic formulations.

DNA: Hard Evidence of Cosmeceutical Claims

To support finished product or raw material claims these two in vitro methods—the Affymetrix microarray and the Taqman Real Time Polymerase Chain Reaction (PCR)—measure the up-regulation or down-regulation of genes.

In vivo Quantification of Corneocyte Lipids by Image Analysis

In a new method described here by the authors, fluorescence emitted from samples and captured by image analysis is used to quantify the number of lipids present in the cornified cell envelope. This in vivo approach is fast and noninvasive and could be used to screen molecules for potential moisturizing and restructuring effects.

In Vitro Model for Decontamination of Human Skin

The present study utilized an in vitro model to compare the decontamination capacity of three model decontaminant solutions: tap water, isotonic saline and hypertonic saline. Human cadaver skin samples were dosed with radio-labeled [14C]-formaldehyde and the surface skin of each sample was washed after each exposure with one of the three model decontaminant solutions.

Dermal Absorption Guidelines for Cosmetic Ingredients: An In Vitro Method

Ex vivo skin absorption studies measure the penetration and permeation of a compound to assess its safety, and can assist the formulator in increasing product efficacy and reducing toxicity. This review analyzes the currently available guidelines published by four major regulatory organizations to clarify important milestones in study design, data analysis and interpretation.

Measuring Antioxidant Capacity of Cosmetics with Emitted Light

Knight Scientific Ltd. offers a kit to manufacturers to measure the antioxidant capacity of their finished nutraceuticals and cosmetics to justify claims, produce technical documents, confirm batch uniformity and more.

Much Ado About Nothing: Cosmetics Testing with a Placebo

In this column, the author investigates the source of the placebo effect. In addition, he asks the question: Must cosmetics testing always incorporate tests against a placebo?

Tape Stripping Method in Humans: Comparison of Evaporimetric Methods

The current preliminary study compared the sensitivity and correlation of open chamber device and closed chamber device on a tape stripping human model. The amount of SC removed by tape stripping was also quantified with a protein assay method.

TRI/Princeton Benchmarks Hair Product Performance

This first effort is focused on the key performance attributes of shampoos, 2-in-1 shampoo and conditioners and shampoo/conditioner systems.

ECVAM Approves Harmonized Lymph Node Assay Standards

ECVAM's Scientific Advisory Committee has endorsed the scientific validity of the harmonized ECVAM performance standards for the Local Lymph Node Assay.

ESAC Approves Two In Vitro Skin Irritation Methods

The European Centre for the Validation of Alternative Methods' (ECVAM) Scientific Advisory Committee (ESAC) endorsed the scientific validity of two in vitro skin irritation tests at its 29th meeting.

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Practical Modern Hair Science

Practical Modern Hair Science

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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Apply Topically: A Guide to Formulating

Apply Topically: A Guide to Formulating

Finally! This book offers practical approach to the formulation chemist’s day-to-day endeavors by: addressing the innumerable challenges facing the chemist both in design and at bench, such as formulating with/for specific properties; offering valuable “tips” to troubleshooting issues regarding ingredient selection and interaction, regulatory concerns that must be addressed early in development, and the extrapolation of preservative systems; exploring the advantages and limitations of raw materials; addressing scale-up and pilot production process and concerns; and much more.Order your copy today.