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Biology
New in Biology (page 27 of 28)
Nov 01, 2005 | 02:44 PM CST
Inside the Hair: An Advanced Hair Biology Model
By: Randy Schueller and Perry Romanowski, Alberto-…
In this survey from the literature, various writers describe a model of the inside of a hair strand, showing a multilamellar structure of the cuticle cells, a multifibril structure of the cortex, and a variety of lipids that are thought to be major contributors to the hair’s physical properties. What exactly is hair? Simply put, the answer is that hair is protein. But this simple answer does not even begin to explain the complexity and sophistication of the hair fiber.
Sep 01, 2005 | 09:51 AM CDT
Skin Friction Coefficient Values
By: Raja K. Sivamani and Gabriel Wu, Department of…
Friction is an important characteristic of skin because it allows us to execute many of our daily activities. In addition, friction studies offer insight into how skin and the skin surface change across age, gender, race, anatomical site, and chemical applications. This can provide better information about expected skin variations in the population and why certain topical applications are effective.
May 06, 2003 | 02:00 AM CDT
Topical Formulations Conforming to the Structure of the Skin
By: Vladimir Vacata, Birgit Gertchen-Ohligschlager…
Biomolecules with physical properties similar to those of the permeability barrier--including the property of forming lamellar structures--offer an alternative to the potentially harmful emulsifiers in topical formulations.
May 06, 2003 | 02:00 AM CDT
Pigmentation, Swelling and Wrinkling in the Eye Area
By: Zoe Draelos, MD, Department of Dermatology, Wa…
Product development to address concerns of pigmentation, swelling, and wrinkling in the eye area requires a basic understanding of the area's unique anatomy and skin physiology.
May 06, 2003 | 02:00 AM CDT
Cigarette Smoking and Skin Biomarkers
By: Hongbo Zhai, MD and Howard I. Maibach, MD, Uni…
Some research has been documented as to the damaging effects of smoking on the skin vasculature and on oxygenation in both human and animal models.
May 06, 2003 | 02:00 AM CDT
A Dermatologic View: Metals in Cosmetics
By: Maibach, H ;Hostynek, JJ
A dermatologic view of nickel compounds in cosmetics.
May 06, 2003 | 02:00 AM CDT
Correlating Porosity and Tensile Strength of Chemically Modified Hair
By: Ali N. Syed and hasan Ayoub, Avlon Industries …
This study validates the porosity method against the widely accepted method of tensile strength for determining the hair damage imparted to hair due to cosmetic treatments.
May 06, 2003 | 02:00 AM CDT
The pH of the Stratum Corneum: An Update
By: Marty Rieger, M&A Rieger Associates
The pH gradient results from enzymatic processes within the SC's major acidic skin components. The lowered pH near the skin's surface contributes to desquamation and lipid processing.
May 06, 2003 | 02:00 AM CDT
Odor Reception: Structure and Mechanism
By: Steve Herman
Olfaction is a multi-step process involving the odorant molecule, the odor receptor protein, the pockets for odorant ligand docking, and the odor patterns formed by the glumeruli and decoded by the brain.
May 06, 2003 | 02:00 AM CDT
Measured Dermal Effect of Applying Retin-A
By: George Andrassy and Howard I. Maibach, Univers…
The research reported here focuses on the dermis because it is the site of the primary water retention molecule, hyaluronic acid (HA) in the skin.