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In vitro
New in In vitro (page 11 of 14)
Jan 02, 2007 | 11:18 AM CST
Expanded Parameters for Particle Analysis
Fluid Imaging Technologies has launched a particle analysis instrument that permits 23 measurement parameters.
Dec 01, 2006 | 11:21 AM CST
Evaluating Droplet Size in Nanoemulsions from a Novel Emulsifier System
By: G. Guglielmini, Sinerga SpA
This article describes two sophisticated techniques to measure the diameter of emulsion droplets on the nanometer scale and uses those techniques to test a new emulsifying agent capable of spontaneously creating emulsions with droplet sizes smaller than 300 nm.
Sep 25, 2006 | 01:47 PM CDT
Ciba Develops Test Method
Ciba Specialty Chemicals has submitted a master file to the US Food and Drug Association (FDA) for its new antimicrobial test method...
Aug 31, 2006 | 10:44 AM CDT
Using Texture Analysis to Substantiate Hair Care Claims
By: Janusz Jachowicz, ISP; Jo Smewing, Stable Micr…
Texture analysis provides quantitative information about a material’s response when deformed by a controlled force. When texture analysis is applied to hair treated with various conditioners and styling fixatives, the results can help substantiate claims made about the effectiveness of these hair care products.
Aug 24, 2006 | 10:21 AM CDT
A Screen for Microbial Contamination
Celsis International introduces the next generation in bioluminescence technology that screens for microbial contamination of personal care products.
Aug 14, 2006 | 09:59 AM CDT
BioScreen Offers Asian Panels
Beginning fall 2006, BioScreen will begin offering Asian subject panels.
Apr 26, 2006 | 11:17 AM CDT
Determination of the In Vitro SPF
By: M. Pissavini and L. Ferrero, V. Alard, U. Hein…
A ring test at six European test centers showed that SPF evaluations with good reproducibility and comparability could be obtained by an in vitro protocol measuring either transmittance or erythema-effective irradiance of product samples applied on PMMA plates.
Apr 17, 2006 | 08:29 AM CDT
AMS Revolutionizes Absorption and Metabolism Studies
By: Bruce A. Buchholz and Howard I. Maibach
Quantification of percutaneous penetration and metabolism of skin care ingredients has seemed daunting; however, new technology provides a ready solution for the problematic arena. Accelerator mass spectrometry (AMS) is a new analytical method that measures a biological response better than the existing technique.
Jan 02, 2006 | 01:04 PM CST
A Dermatological View: Using Photochemiluminescence to Quantify the Antioxidative Capacity of Topicals
By: H Zhai, MD, and HI Maibach, MD, University of …
Exposure to ultraviolet radiation (UVR), air pollutants, chemical oxidants and aerobic microorganisms may damage the skin. In particular, reactive oxygen species (ROS) are considered a likely contributor to skin aging, cancer and certain skin disorders.
Dec 23, 2005 | 05:31 PM CST
Evaluating Antipruritics
By: Hongbo Zhai, MD, and Howard I. Maibach, MD, Un…
Pruritus or itching is an unpleasant sensation that provokes a desire to scratch. Many factors such as chemical, mechanical, thermal and electrical stimuli can elicit the itch sensation. Mediators of itch presumably directly act on nerve fibers or lead to a nerve stimulation cascade whose final common pathway is interpreted in the central nervous system as itching. Putative receptors for itching are C-fibers with exceptionally low conduction velocities and insensitivity to mechanical stimuli. Histamine, the proto-typical chemical mediator of itch, which is released during mast cell degranulation and mediates its effects in the skin via H1 receptor, is the best-known experimental pruritogen.