نتایج جستجو برای: ultraviolet spectrophotometry
تعداد نتایج: 48877 فیلتر نتایج به سال:
The skin anti-aging effects of orally administered salmon nasal cartilage extract (SNCE), which includes abundant proteoglycan, were investigated using a hairless mouse skin-aging model, in which aging was caused by repetitive ultraviolet B (UV-B) irradiation. Physiological analysis of the skin surface following repetitive UV-B irradiation of 8 weeks revealed inhibition of erythema levels and r...
The textile modification technique of calendering was used to change the cover factor wearable textiles in order improve ultraviolet protection and decrease amount radiation transmitted through fabric. Using optical microscopy spectrophotometry, quantifiable changes that occurred after repeated passes calender were measured. It found one pass uncovered area decreased by a two increased 200%. th...
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چکیده ندارد.
a simple and sensitive, solid-phase extraction method for the removal of citalopram drug from waste water has been developed by using magnetic nanoparticles modified with surfactant sodium dodecyl sulfate. these magnetic nanoparticles have shown great adsorptive tendency towards citalopram drug. the effect of different parameters influencing the extraction efficiency of this drug were investiga...
Arbutin is the main active ingredient in many herbal medicinal products that have diuretic, antimicrobial, bactericidal, and antioxidant effects. Many of these are mixtures different substances. Therefore, approaches to quality control HMPs can vary significantly. The aim study was compare arbutin assay procedures used arbutin-containing products. Materials methods. Samples following were study...
a user-friendly and inexpensive ionic liquid-based single-drop microextraction (il-sdme) method was developed to preconcentrate trace amounts of aminophenol isomers (aps) from human urine, hair dye and water samples prior to analysis by high performance liquid chromatography-ultraviolet spectrophotometry detection (hplc-uv). under optimum conditions (i.e., 3.5 µl of 1-hexyl-3-methylimidazolium ...
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