Importance of sunscreen products spreading protocol and substrate roughness forin vitrosun protection factor assessment
نویسندگان
چکیده
منابع مشابه
Sun protection and sunscreen labeling--an update.
Sun exposure is today well recognized as having an adverse effect on human skin. Part of sun radiation, ultraviolet radiation A (UVA) and B (UVB), can modify skin structures and induce short-term skin changes (sunburn, tanning, hyperkeratinization, brown spots) and long-term skin damages (accelerated skin aging and skin cancers). Protection against both UVA and UVB is very important, therefore ...
متن کاملSpectrophotometric determination of UV protection provided by cosmetic products with sunscreen properties
Introduction It is well known that overexposure to the sunlight, particularly to UV rays, may cause many skin defects, like sunburns (erythema), premature skin aging (wrinkles), photosensitivity, suppression of the immune system or even skin cancers. For many years, sunscreens have been recommended by dermatologists, not only as a protective measure against excessive amounts of sunlight, but al...
متن کاملdiagnostic and developmental potentials of dynamic assessment for writing skill
این پایان نامه بدنبال بررسی کاربرد ارزیابی مستمر در یک محیط یادگیری زبان دوم از طریق طرح چهار سوال تحقیق زیر بود: (1) درک توانایی های فراگیران زمانیکه که از طریق برآورد عملکرد مستقل آنها امکان پذیر نباشد اما در طول جلسات ارزیابی مستمر مشخص شوند; (2) امکان تقویت توانایی های فراگیران از طریق ارزیابی مستمر; (3) سودمندی ارزیابی مستمر در هدایت آموزش فردی به سمتی که به منطقه ی تقریبی رشد افراد حساس ا...
15 صفحه اولInfluence of applied quantity of sunscreen products on the sun protection factor--a multicenter study organized by the DGK Task Force Sun Protection.
It is often debated that the protection against solar-induced erythema under real conditions is dependent upon the amount of sunscreen applied. It is believed that when too little is applied a lower sun protection than indicated on the label will result. The aim of this study was to quantify this effect. In this multicenter study, the influence of three different amounts (0.5, 1.0, 2.0 mg/cm(2)...
متن کاملتعیین مقدار فاکتور حفاظتی اشعه‌ی فرابنفش A در کرم‌های ضدآفتاب
Sunscreen products are among the most important ways for skin protection against sunburn, early skin aging and skin cancer. Due to existing wide variation of sunscreens, it is necessary to assure their protection ability against the sun damage. Performance assessment of sunscreen products against UVA is expressed by sun UVA protection factor (UVA-PF). Because currently these factors are determi...
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ژورنال
عنوان ژورنال: International Journal of Cosmetic Science
سال: 2009
ISSN: 0142-5463,1468-2494
DOI: 10.1111/j.1468-2494.2009.00524.x