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Testing
New in Testing (page 21 of 24)
Dec 23, 2005 | 04:09 PM CST
Quality Comparison of W/O and O/W Photo-Protection Creams
By: Tatiana Maria de Almeida Silva, Ketylin Fernan…
The authors determined the quality of a photoprotector W/O cream by evaluating its microbial control, physicalchemical stability and sensory appeal in comparison to an O/W photo-protector cream.
Dec 23, 2005 | 03:31 PM CST
Quantifying Benzophenone-3 and Octyl Methoxycinnamate in Sunscreen Emulsions
By: M. Ines R. M. Santoro, D.A.G.C. Oliveira, E.R.…
The authors have validated a high performance liquid chromatographic (HPLC) method for the quantitative determination of benzophenone- 3 and octyl methoxycinnamate present in sunscreen emulsions.
Dec 23, 2005 | 03:13 PM CST
In Vivo Quantitative Evaluation of Gloss
By: P. Clémenceau, S. Breugnot and B. Pouet, Bossa…
A real time polarization analysis technique is described that differentiates components of scattered light in video images and enables in vivo quantitative evaluation of gloss from hair and skin during quality control and claims substantiation.
Dec 23, 2005 | 03:11 PM CST
Quantifying Skin Relaxation and Well-Being
By: C. Mas Chamberlin, O. Peschard, Ph. Mondon and…
Skin relaxation and well-being can be measured by quantitative methods, and modulated by a Tyr-Arg neuropeptide used in topical cosmetic preparations.
Dec 23, 2005 | 02:59 PM CST
Evaluating Shampoo Foam
By: Ken Klein
There is probably no personal care category that is more competitive than shampoos. With this in mind, formulators of shampoos are asked by marketing to develop products to both appeal to consumers and perform (whatever “perform” means).
Dec 23, 2005 | 02:36 PM CST
Liquid Crystals in O/W Emulsions with Urea: Development and Testing
By: O.D.H. Santos, F. Sacai, M. Ferrari and P.A. R…
Using a ternary phase diagram, the authors developed systems based on nonionic surfactants, light paraffin oil, water, and (optionally) urea. Systems in which lamellar liquid crystals formed and in which urea was an ingredient showed higher occlusive power and lower TEWL in in vitro tests.
Dec 23, 2005 | 02:27 PM CST
Testing for Penetration of the Skin Barrier
By: Theresa M. Callaghan, Hill Top Research Inc.
The skin barrier is described, after which tests and case studies illustrate how to show if actives and other ingredients have or have not penetrated the skin barrier.
Dec 13, 2005 | 11:39 PM CST
Quantifying Sunscreens and Preservatives in Cosmetic Products
By: J. Awatramani and J. E. Nucci, Revlon Consumer…
The authors propose and validate an HPLC method for simultaneous quantitation of commonly used commercial sunscreen actives and preservatives in cosmetic emulsions.
Dec 13, 2005 | 11:28 PM CST
Advanced Methods Measure Skin Penetrants at the Parts-Per-Billion Level
By: Jurij J. Hostynek and H.I. Maibach
Healthy and intact skin was formerly considered an impermeable barrier designed to shield the living organism from all types of environmental injury, and certainly offering protection from all things chemical. Now skin is recognized as a semi-permeable membrane. Microorganisms cannot penetrate it, but it is pervious to chemicals, selectively allowing molecular passage in and out of the skin.
Dec 13, 2005 | 10:56 PM CST
Advanced Methods Measure Skin Penetrants at the Parts-Per-Billion Level: Part II
By: Jurij J. Hostynek and H.I. Maibach
Part I of this Dermatologic View column appeared in the January issue of C&T magazine and described advanced methods to measure skin penetration such as Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) and Atomic Absorption Spectrophotometry (AAS). Here, the authors continue this investigation of advanced methods to measure skin penetration.