نتایج جستجو برای: stilbenes
تعداد نتایج: 1217 فیلتر نتایج به سال:
Naphthalene-terminated stilbene dendrimers, the largest stilbene dendrimers to date, underwent photoisomerization via highly efficient energy transfer from the dendron group to the core stilbene. It was also demonstrated that the energy transfer efficiency in these dendrimers may be controlled by light, utilizing trans-cis isomerization as the key photoreaction.
Two diglucoside stilbene trimers and a benzoisofuranone derivative were isolated from Foeniculum vulgare fruit together with nine known compounds. Their structures were elucidated by spectral methods including 1D, 2D NMR and MS and chemical methods. Antioxidant activity was tested using three methods: DPPH(), total antioxidant capacity and assay of lipid peroxidation.
Compounds formed by exchanging one of the resveratrol hydroxy groups to methoxy or formyl groups are biologically important. Quantum chemical DFT calculations were applied for the simulation of some of their properties. Their optimized structures and charge distributions were computed. Based on the calculated vibrational force constants and optimized molecular structure infrared and Raman spect...
A 10% emulsion of SBE (containing 35% stilbene glucosides) provided UV protection equal to half the efficiency commercial SPF 15 sun lotions.
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