Quantitative Assessment of Age-dependent Changes in Porphyrins from Fluorescence Images of Ultraviolet Photography by Image Processing.

Background: Skin is the first line of defense against harmful external environmental factors. Skin flora living on the skin surface impact skin health and skin disease. Bacteria, form part of the unique and complex skin micro-ecological system.

Objective measurement and comparison of human facial skin color in East Asian females.

Background: Skin color is an important physiological index of human skin that has essential significance in cosmetology and dermatological diagnoses and aesthetics, especially in East Asian culture, where the beauty standard is the whiter the skin, the more beautiful a person is. However, there has been a lack of objective comparisons of facial skin color in East Asian females.

Materials And Methods: Skin color at the cheek site was measured in 445 healthy females, including 362 Chinese women in Beijing and 83 Japanese women in Tokyo, all aged 18-50 years.

Photodynamic therapy using direct-current pulsed iontophoresis for 5-aminolevulinic acid application.

In photodynamic therapy (PDT) for skin cancer, 5-aminolevulinic acid (ALA) is applied topically to the affected area to be absorbed percutaneously through passive diffusion, and typically requires 4-6 h before performing PDT. In this study, we attempted to reduce the absorption period in PDT by ionizing ALA using direct-current pulsed iontophoresis to treat actinic keratosis (AK). Twenty percent ALA solution was applied to AK lesions of five patients using direct-current pulsed iontophoresis.