Recent in In vitro (page 10 of 11)
Nov 1, 2005 | Myeong Jun Choi, Ph.D., and Howard I. Maibach, M.D.
Stress induces changes in the ceramide content of the skin, and may lead to compromised barrier function or skin diseases. Skin has ways of responding to these stresses, as we review here in the case of skin stressed by tape stripping, organic solvents, overcrowding, and ultraviolet (UV) irradiation.
Nov 1, 2005 | Y. K. Kamath, TRI
Torsional properties are described by the author as a method to distinguish between the surface and the bulk effects of actives in hair formulations.
Jan 7, 2004 | Berislav Markovic, Donna Laura and Mark Rerek, International Specialty Products
A new laboratory in vitro method for the measurement of sunscreen water resistance uses spectrophotometric analysis of a model skin substitute before and after 80-minute immersion. It gives good correlation with the FDA’s 80-minute immersion SPF results (very water resistant). The method is especially good for screening new formulations or water-resistant technologies.
May 6, 2003 | J. Menoutis and A. I. Parisi, Quantex Laboratories Inc.
Each batch of triclosan should be analyzed for trace amounts of 2 3 7 8-tetrachlorodibenzo-p-dioxin and 2 3 7 8-tetrachlorodibenzofuran, which can form as unwanted manufacturing by-products, as shown in triclosan from six commercial Asian sources.
May 6, 2003 | Anja Gestmann, Valerie Bonnardel and Jocelyne Milliere, National Starch Personal Care
The authors describe how to test an ingredient for its potential as a skin care emulsion platform using, as an example, a new starch-based ingredient called hydroxypropyl starch phosphate.
May 6, 2003 | Donald S. Orth, Neutrogena; David C. Steinberg, Steinberg & Associates
The authors explain how preservative efficacy testing is done to determine whether a formula is adequately preserved. Product contamination problems are frequently caused by inadequate preservation.
May 6, 2003 | The Cosmetic Toiletry and Fragrance Association (CTFA)
CTFA conducted a survey in 1999 to determine the consistency of the industry's procedures for preservative and stability testing used by the cosmetic industry.
May 6, 2003 | Luis Jimenez, Consumer Product Testing Co.
In tests on eight dentifrice formulations, a bioluminescence system based on adenosine triphosphate (ATP) detected tested microorganisms qualitatively within 24-27 hours, compared to 5-7 days required for quantitative detection by standard methods.
May 6, 2003 | James V. Gruber and Kevin O'Brien, Arch Personal Care Products
The advent of the complete transcribing of the human genome will forever alter our perceptions of skin care, medicine and nutrition. This column is edited by Lawrence A. Rheins, PhD.
May 6, 2003 | Howard I. Maibach, MD, and Veranne Charbonnier, University of California
To avoid the acute irritation and dryness that a sincle occlusive surfactant application (24-h) patch tes4t may cause, and to more realistically approximate actual consumer use, an open assay model was chosen.
May 6, 2003 | Randy Schueller and Perry Romanowski, Alberto-Culver Company
Marketing research studies have shown that shine is one of they key benefits that women expect from hair care products, particularly from shampoos and conditioners. This article defines shine in the context of hair care and discusses ways to measure it.
May 6, 2003 | J. Alan Swift, Developmental Toxico-Pathology Group; Surinder P. Chahal and Debra L. Coulson, Croda Colloids Ltd.; and Nicholas I. Challoner, Croda Oleochemicals Ltd.
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.