منابع مشابه
Color measurements on prints containing fluorescent whitening agents
Papers with a slightly blue shade are, at least among a majority of observers, perceived as whiter than papers having a more neutral color. Therefore, practically all commercially available printing papers contain bluish dyes and fluorescent whitening agents (FWA) to give the paper a whiter appearance. Furthermore, in the Paper Industry, the most frequently used measure for paper whiteness is t...
متن کاملAngular variations of reflectance and fluorescence from paper - the influence of fluorescent whitening agents and fillers
It has earlier been shown that light reflected from the body of paper exhibit anisotropic behavior. On the other hand, fluorescence emission is often assumed to be distributed in a Lambertian manner. The angular behavior of light reflected and fluoresced from paper is examined using measurements from a spectral goniophotometer. The angular dependency of the radiance factors was measured for a r...
متن کاملThe Hunt for Natural Skin Whitening Agents
Skin whitening products are commercially available for cosmetic purposes in order to obtain a lighter skin appearance. They are also utilized for clinical treatment of pigmentary disorders such as melasma or postinflammatory hyperpigmentation. Whitening agents act at various levels of melanin production in the skin. Many of them are known as competitive inhibitors of tyrosinase, the key enzyme ...
متن کاملDetermination of Fluorescent Whitening Agents in Paper Materials by Ion-Pair Reversed-Phase High-Performance Liquid Chromatography
A simple method was developed for the analysis of seven stilbene-type fluorescent whitening agents (FWAs) in paper materials by ion-pair reversed-phase high-performance liquid chromatography with fluorescence detection. These stilbene-type FWAs included two disulfonate, two tetrasulfonate, and three hexasulfonate compounds. After optimization of chromatographic conditions, the FWAs were satisfa...
متن کاملOver-the-counter whitening agents: a concise review.
Tooth discoloration is commonly found in the dental clinic and tooth bleaching has been considered the preferred esthetic alternative, being more conservative, safe and with predictable results. Supervised home-use of 10% Carbamide Peroxide (CP) bleaching with custom-trays is the most common bleaching procedure dispensed by dentists to their patients. The good results obtained with this techniq...
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ژورنال
عنوان ژورنال: Journal of Synthetic Organic Chemistry, Japan
سال: 1955
ISSN: 0037-9980,1883-6526
DOI: 10.5059/yukigoseikyokaishi.13.458