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Osman Zeki Üngör, born in 1880 in the Üsküdar district of Istanbul, hailed from a family deeply rooted in music. His grandfather, Santuri Hilmi Bey, was the founder of the “Fasl-ı Cedid” division of the Ottoman Imperial Orchestra, Muzıka-i Hümayun. His father, Hüseyin Bey, belonged to the notable Şekerci Hacı Bekir family. Growing up in Üsküdar, an important musical environment of the period, significantly contributed to the development of his artistic identity.Education and Early Musical Career

Sunscreens are topical formulations developed to protect human skin from the harmful effects of ultraviolet radiation (UVR). These products act as part of a broader photoprotection strategy, aiming to reduce risks associated with sun exposure, such as erythema, photoaging, and skin cancers. Despite their intended protective function, questions regarding sunscreen efficacy, safety, and environmental impact persist.Ultraviolet Radiation and Its EffectsUVR constitutes approximately 5% of the total