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New in Function (page 12 of 53)
Oct 05, 2011 | 12:05 PM CDT
By: Isabelle Van Reeth, Xinyan R. Bao, Yasuhiro Ka…
Mastering formulating techniques with water-in-silicone emulsifiers can help cosmetic chemists create stable emulsions that combine distinctive aesthetics with improved performance. Here, the authors describe how altering parameters including the water to silicone/oil ratio, mixing processes, emulsifier levels, the nature of the external and internal phases, and the presence or lack of co-emulsifiers affect the characteristics of final formulations.
Oct 05, 2011 | 11:58 AM CDT
By: Kedar Kumthekar and Jayashree Nagarkar, PhD, I…
Tocopherols and tocotrienols are the major constituents of almond oil, safflower oil and palm oil. They are necessary for the normal growth and metabolism of healthy skin. These oils were formulated in nourishing skin care products and massage creams as part of stable o/w emulsions and were found to have excellent storage stability, flow properties, spreadability and moisturizing properties.
Oct 05, 2011 | 11:49 AM CDT
By: Kerry Hanson and Christoper Bardeen, Universit…
In the present article, sunscreens containing the antioxidants vitamin E and diethylhexyl syringylidene malonate were tested for their efficacy in preventing UV-induced reactive oxygen species in the lower stratum corneum. The addition of the antioxidants was found to significantly improve the ability of low to high SPF sunscreens to attenuate ROS formation in UV-exposed skin.
Oct 05, 2011 | 11:40 AM CDT
By: Mike J. Fevola, Johnson & Johnson
Carbomers, a family of crosslinked acrylic acid polymers, are essential ingredients in numerous products, including: pharmaceuticals; cosmetics and personal care items; household, industrial and institutional care products; printing inks; adhesives and coatings. This column will explore the chemistry and properties of carbomers that have earned them this well-deserved reputation.
Sep 08, 2011 | 03:19 PM CDT
By: Bernard Idson, PhD, College of Pharmacy, The U…
Youthful skin is perceived as moist (or at least nondry), clean soft and virtually free of wrinkles. As consumers advance in age, concern about dry skin increases, and simply washing with soap and water gives way to us of products designed to treat the symptom, which all end up bearing some version of a moisturizer.
Sep 01, 2011 | 01:50 PM CDT
By: Giorgio Dell’Acqua, PhD, and Christian Wagner,…
Skin discoloration and excessive pigmentation due to increased melanin production is associated with skin inflammation and aging. Therefore, an extract rich in acetylated hydroxystilbenes from Rheum rhaponticum was combined with panthenyl triacetate to test in the melanogenesis pathway. The complex strongly reduced melanogenesis and melanin accumulation in human skin explants, decreased melanin content in pigmented spots, increased skin brightness and enhanced skin radiance on the face of human volunteers in a double-blind clinical study.
Sep 01, 2011 | 01:45 PM CDT
By: Marida Bimonte, Antonietta Carola, Annalisa Ti…
Coffea species have been widely evaluated for effects including oxidative stress protection and immunomodulation. The present study therefore evaluates the cosmetic activity of an extract obtained from cultured Coffea bengalensis stem cells. Results showed the extract imparted hydration activity in the keratinocytes, stimulated collagen synthesis in the fibroblasts and enhanced adipocyte differentiation starting from mesenchymal precursor cells.
Sep 01, 2011 | 01:39 PM CDT
By: Craig Bonda, Jean Zhang and Anna Pavlovic, The…
In this study, the effects of ultraviolet radiation (UVR) on trans-resveratrol were documented, finding that UV radiation causes it to undergo rapid and extensive photoisomerization and some photodecomposition. The antioxidant activity of trans-resveratrol is correspondingly reduced. However, in the presence of ethylhexyl methoxycrylene, a photostabilizer used in sunscreens, the effects of UV exposure on trans-resveratrol are minimized, thereby preserving its antioxidant activity and, presumably, its bioavailability.
Sep 01, 2011 | 01:34 PM CDT
By: Michael J. Fevola, PhD, Johnson & Johnson
L-Ascorbic acid (AscA), more commonly referred to as vitamin C, is best known for its vital role in human health and nutrition, where it functions as a cofactor in enzymatic reactions, such as collagen synthesis, and as an antioxidant.
Sep 01, 2011 | 01:30 PM CDT
By: Eric S. Abrutyn, TPC2 Advisors Ltd.
The term “skin lightening” has been positioned in the cosmetic market to denote the return of skin’s color to a more natural transparent tone, providing a more even skin tone and lighter skin pigment. Topical skin lighteners suppress production of melanin pigment, prevent darkening of the skin or modify pigmentation such as blotches and freckles.