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New in Sun Care (page 4 of 8)
Jan 30, 2009 | 10:23 AM CST
By: Christine Mendrok-Edinger, Kimberly Smith, Ann…
Butyl methoxydibenzoyl methane (BMDBM) is well-known as an effective UVA filter when it is stabilized. Here, the authors measure the efficiency of ten commercially available products that are reported to stabilize BMDBM. The most effective product found was octocrylene that, being a UVB filter, also contributed to the SPF.
Feb 05, 2008 | 08:32 AM CST
By: P. Morganti, Mavi Sud Srl; E. Ruocco, Universi…
This article describes the study of a topical sunscreen formulation that contains titanium dioxide and ethylhexyl methoxycinnamate for UV protection, and phosphatidylcholine and hydrosoluble azelaic acid for acne control.
Feb 05, 2008 | 08:13 AM CST
By: Craig Bonda, The HallStar Company
This article provides a visual depiction of pathways that UV filters undergo when exposed to solar radiation; such pathways often lead to photo-instability. A fluorescence technique is described that has led the author to identify compounds that preserve photostability in a novel manner— by quenching the UV filter’s singlet excited state.
Jun 01, 2007 | 10:33 AM CDT
By: Ian L. Gatfield, Jens-Michael Hilmer and Heinz…
The naturally occurring ethyl ester of p-methoxycinnamic acid can undergo efficient enzymatic conversion into the corresponding isoamyl ester via lipase catalysis using natural isoamyl alcohol as reactant. This transesterification provides a natural route to a popular sunscreen filter.
Apr 30, 2007 | 03:12 PM CDT
By: Jennifer Davis, Doreen Petersen and Daniel Li,…
Acrylic-based film-forming polymers lend properties of water resistance to both traditional and nontraditional sunscreen formulations. Dehydroxanthan gum is a film-forming polymer, a rheology modifier and an SPF booster in sunscreen systems containing zinc oxide. Illustrations are provided...
Mar 02, 2007 | 10:46 AM CST
By: Hongbo Zhai, MD, and Howard I. Maibach, MD, Un…
Described here was an in vivo model to determine antioxidative capacity of a topical skin care emulsion versus the emulsion’s vehicle on human skin that was exposed to UVR. Results suggest the test emulsion and its vehicle control inhibited the induction of erythema and reduced inflammation caused by the UV exposure.
Feb 01, 2007 | 02:06 PM CST
By: Robert Holtz, BioInnovation Laboratories
The methods described in this article highlight some of the markers that can be used to assess the UV protective effects of a test material. All of these markers represent either an index of UV-induced damage to the cell or the cell’s response to the damage.
Feb 01, 2007 | 10:49 AM CST
By: G. Wakefield, J. Stott and A. Duggan, Oxonica …
Photoinduced degradation and activity in chemical and mineral UV-absorbing actives results in a decrease in UVA protection during topical use, with a corresponding risk of skin pathologies in the user. New developments in UV absorbers are shown to maintain a stable, high level of UVA protection during use.
Dec 28, 2006 | 01:24 PM CST
By: Daniel Schmid and Fred Zülli, Mibelle AG …
Impaired functioning of mitochondria is a very important factor in aging. Irradiation of normal human fibroblasts with UV was shown to increase the frequency of mutations in the mitochondrial DNA. Treatment of the fibroblast culture with a nanoemulsion containing coenzyme Q10 and vitamin E acetate was found to protect the mitochondrial DNA against UV-induced mutations.
Dec 28, 2006 | 11:44 AM CST
By: A. Plantivaux, Sophia Antipolis University; E.…
In the presented studies, researchers investigated the effect of the (Cys-Gly)2 dimer peptide against UV-induced oxidative stress on cultured human fibroblasts. The dimer peptide was found to act on a range of mechanisms involved in cell defense against such stress.