Quantitative assessment of hair photodamage with
and without application of sunscreen products is an important input to cos- metic chemist for product development and evaluation. However, the task has not been easy due to the complexity of the situation. Hence, often a combination of analytical methods each giving specific information is needed for a comprehensive evaluation. How- ever, most of the available analytical methods index the damage to the cuticle, while the damage to the inner mass (cortex), partic- ularly at the molecular level, remains largely not investigated. From this angle, the positron method utilizes positronium as its de- fect probe, which due to its small size (2 Å) and penetrability can directly characterize the microstructural damage to the cortex re- gion. This special feature of PALS technique, exploited in this study, could be the basis for an important and unique method of product testing and evaluation in the cosmetic industry.
Quantitative assessment of hair photodamage with
and without application of sunscreen products is an important input to cos- metic chemist for product development and evaluation. However, the task has not been easy due to the complexity of the situation. Hence, often a combination of analytical methods each giving specific information is needed for a comprehensive evaluation. How- ever, most of the available analytical methods index the damage to the cuticle, while the damage to the inner mass (cortex), partic- ularly at the molecular level, remains largely not investigated. From this angle, the positron method utilizes positronium as its de- fect probe, which due to its small size (2 Å) and penetrability can directly characterize the microstructural damage to the cortex re- gion. This special feature of PALS technique, exploited in this study, could be the basis for an important and unique method of product testing and evaluation in the cosmetic industry.
การแปล กรุณารอสักครู่..
