Abstract: The disclosure claims a continuous processing method of 2-Methyltetrahydrofuran (2-MeTHF), including the steps as follows: introducing gasification furfural and hydrogen into a first reaction zone and processing a first catalytic hydrogenation reaction; introducing the gas which is output from the first reaction zone to a second reaction zone to implement a secondary catalytic hydrogenation reaction; and condensing the gas output from the second reaction zone to obtain the 2-MeTHF; wherein, the first reaction zone is filled with a catalyst which is used for aldehyde group reduction, and the second reaction zone is filled with the catalyst for aromatic saturation hydrogenation. By adopting the low-toxicity catalyst which is cheap and easy to get, the high-purity 2-MeTHF can be produced by implementing the gas-phase continuous reaction by the furfural under low pressure or ambient pressure, the traditional process which has high pressure, high investment and high risk can be changed.

Abstract: Methods for introducing nucleic acids into mammalian cells are provided which use imidazolium lipids. The imidazolium lipids have the formula: wherein R1 and R2 each independently represent a C8-C24 saturated or unsaturated hydrocarbon chain, uninterrupted or interrupted by from 1 to 3 heteroatom moieties selected from —O—, —S—, —NH— and —NR—; X represents —CH2—, —O—, —S—, —NH— or —NR—; wherein R is a lower alkyl group having from 1 to 4 carbon atoms; n is an integer of from 1 to 2; and A− is an anion.

Abstract: Compounds of the formula: ##STR1## are provided, in which R.sup.1 and R.sup.2 each independently represent a C.sub.8 -C.sub.24 saturated or unsaturated hydrocarbon chain, which is optionally interrupted by from 1 to 3 heteroatom moieties, such as --O--, --S--, --NH-- and --NR--. The symbol X represents --CH.sub.2 --, --O--, --S--, --NH-- or --NR--. The R group for each of the --NR-- moieties represents an alkyl group having from 1 to 4 carbon atoms. Finally, the subscript n represents the integer 1 or 2, and A.sup.- represents an anion, preferably chloride or citrate.