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Apr 30, 2024 · Use a solvent mixture of petroleum ether and ethyl acetate (volume ratio 3:1) a developing solvent to purify it by column chromatography according to the above procedure to obtain DGEBA. This process, also known as a one-step process, is commonly used for the preparation of low and medium molecular weight bisphenol A epoxy resins.
1 day ago · Emulsifier TX-40 Poly(oxy-1,2-ethanediyl), alpha-isodecyl-omega-hydroxy-GP 11 SULFONATED ALIPHATIC POLYESTER Emulsifier OS-15 POLYOXYETHYLENE(10) STEARYLAMINE ETHER Emulsifier OP-15 Polyoxyethylene stearate Polyethylene glycol mono(2-ethylhexyl) ether Emulsifier OP-21 Penetrating Agent JFC METABLASTIN Emulsifier OP-30 PPG-9-ETHYLHEXETH-5 PEG-3 ...
2 days ago · Protein enzyme information for 1.-.-.- Oxidoreductases | 1.1.-.- Acting on the CH-OH group of donors | 1.1.3.- With oxygen as acceptor. Find compounds, bioassays, and ...
5 days ago · 1, 2-Dimethoxybenzene, commonly known as veratrole, is an organic compound with the formula C6H4 (OCH3)2. It is a colorless liquid with a pleasant odor and slight solubility in water. It is the dimethyl ether derived from pyrocatechol, too. 1, 2-Dimethoxybenzene is naturally occurring. Its biosynthesis entails the methylation of guaiacol by ...
Apr 29, 2024 · Caprylic/capric triglyceride is a natural coconut and palm kernel oil derived mixture ofglycerin triester with caprylic and capric acids, which can be used as an alternative to mineral and vegetable oils. It is a mixed ester composed of caprylic and capric fatty acids attached to a glycerin backbone. It is an excellent moisturising emollient ...
Apr 17, 2024 · Kaempferia galanga L. (KGL) from Hainan, China was extracted by ultrasonic-assisted extraction with 90% ethanol solution, and then extracted with petroleum ether after the ethanol extract was recovered to be alcohol free. The antioxidant activity of the petroleum ether fraction of KGL was first tested using the ABTS method. GC-MS was used to analyze the chemical constituents of the petroleum ...
