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New in Biology (page 9 of 30)
Oct 28, 2011 | 01:45 PM CDT
By: Elsa Jungman, Cécile Laugel and Arlette Baille…
In cosmetics, parabens are widely used due to their low cost and efficacy. In recent years, however, some reports have claimed that these materials exhibit estrogenic activity, which has led to attempts to replace them in formulations. This article reviews penetration studies of parabens spanning the past 20 years to determine whether they pose a risk to human health.
Oct 28, 2011 | 01:38 PM CDT
By: Howard I. Maibach, MD, University of Californi…
As is described here, moisturizers can influence the properties and structure of corneocytes by influencing the SC and consequently, the skin water barrier function. This hydrative influence of moisturizers could be beneficial as well as destructive toward skin barrier function.
Oct 26, 2011 | 11:06 AM CDT
Skin occlusion is a complex issue. Occlusion usually means the skin is covered directly or indirectly by impermeable films or substances, but certain topical vehicles that contain fats and/or polymer oils may also generate occlusive effects. They speed healing, but can also encourage the formation of bacteria. In the following excerpt, Zhai, MD, and Maibach, MD, review recent studies in various modes and methods of occlusion.
Oct 26, 2011 | 10:06 AM CDT
Scientists at the University of Gothenburg and Chalmers University of Technology have found a bacterial component that serves as a UV filter without causing contact allergies.
Oct 14, 2011 | 03:15 PM CDT
Researchers from the University of Cologne, Ghent University and the German Sport University Cologne have identified the protein that may stop necroptosis in keratinocytes, thereby preventing skin inflammation.
Oct 05, 2011 | 09:33 AM CDT
Contact allergic dermatitis is a common, and some say pervasive public health problem. The degree to which fragrances and fragranced products contribute to this issue is investigated in a two-part overview by Howard Maibach, MD, and Jurij Hostýnek, PhD, from which the following is excerpted.
Sep 26, 2011 | 05:02 PM CDT
Scientists at the Rockefeller University have stumbled upon what they believe to be a better explanation of the ability of N,N-diethyl-meta-toluamid's (DEET) to repel insects from skin.
Sep 20, 2011 | 05:23 PM CDT
By: Anthony J. O'Lenick Jr., Siltech LLC; and Kell…
Here, industry expert Tony O'Lenick asks Kelly Dobos to explain the difference between keratinocytes and corneocytes. Many skin care products target either keratinocytes or corneocytes; therefore, understanding their differences and the basic structure of human skin is important for formulators.
Sep 01, 2011 | 09:58 AM CDT
Researchers at Rutgers have suggested that topical caffeine may help lower the risk of UV-induced skin cancer.
Aug 31, 2011 | 12:06 PM CDT
Occlusion bears both positive and negative effects on the health and integrity of skin. In the following excerpt, Hongbo Zhai, MD, and Howard Maibach, MD, introduce a discussion of the effects of occlusion on skin.