Before polymerization the mixture was degassed via four freeze-evacuated-thaw cycles, refilled with argon and then immersed in a preheated oil bath. The product was isolated by precipitation into excess of diethyl ether and dried under vacuum. The monomer conversion was determined by 1H NMR ...
materials Article Synthesis and Characterization of Bio-Oil Phenol Formaldehyde Resin Used to Fabricate Phenolic Based Materials Yong Cui 1,3, Xiaopeng Hou 2, Wenliang Wang 3,4 and Jianmin Chang 3,* 1 Precision Manufacturing Engineering Department, Suzhou Vocational Institute of Industrial Technology, ...
The Soxhlet apparatus was used for the determination of oil in each sample according to the American Association of Cereal Chemists (AACC), method No. 30-25 [46]. The protocol mentioned in AACC, method No. 32-10 [46] was used for the determination of crude fiber content. The procedure ...
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Several studies confirmed the drug injection into silicone oil-filled eyes led to its migration to the aqueous interface, resulting in an increase in the local concentration and the ulterior precipitation. This may cause retinal toxicity [57,58], supposedly caused by a decrease on the preretinal-...
The mixture was extracted with EtOAc (2 × 40 mL) and the organic fractions combined, dried over anhydrous Na2SO4, filtered and the solvent was removed under reduced pressure. Compound 8 was purified by column chromatography (EtOAc/n-hexane, 1:7) as a colourless oil. Yield, 90%. 1H ...
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In the long term, this unyielding dependency is threatened by the depletion of the crude oil reserve. However, in the short term, its price highly fluctuates due to various factors, such as regional and global security instability causing additional complexity on refinery production planning. The ...