Abstract: An object of the present invention is to provide a compound or a salt thereof constituting lipid particles that can achieve a high nucleic acid encapsulation rate and excellent delivery of nucleic acids, and to provide lipid particles that can achieve a high nucleic acid encapsulation rate and excellent delivery of nucleic acids. According to an aspect of the present invention, a compound represented by Formula (1) or a salt thereof is provided.

Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit that has a compressor, a condenser, an expansion device, and an evaporator that are connected through a pipe, the refrigeration cycle circuit being configured to allow refrigerant to circulate in the refrigeration cycle circuit, and a controller configured to determine whether the refrigerant leaks or whether the expansion device malfunctions on the basis of a degree of subcooling at an outlet of the condenser and a degree of superheat at an outlet of the evaporator or a degree of superheat at a suction port of the compressor.

Abstract: Provided is a method for producing an N-(hetero)aryl (meth)acrylamide compound, including reacting a compound represented by General Formula (1) with a compound represented by General Formula (2) at a temperature higher than 120° C. to carry out amidation and to obtain a compound represented by General Formula (3). R1 represents a hydrogen atom or an aliphatic group, R2 and R4 represent a hydrogen atom, a chain-like aliphatic group, an aliphatic hydrocarbon ring group, an aryl group, or a heterocyclic group, Ar represents an aromatic ring, R3 represents an electron withdrawing group, m represents an integer of 1 or more, and n represents an integer of 0 or more. R4 is not an ?-hydroxybenzyl group.

Abstract: The present invention provides an intermediate compound for easily producing a compound having an azaperylene skeleton. Another object of the present invention is to provide a method for easily producing a compound having an azaperylene skeleton. The compound of the present invention is a compound represented by Formula (I), or a compound represented by Formula (II).

Abstract: An object of the present invention is to provide a compound or a salt thereof constituting lipid particles that can achieve a high nucleic acid encapsulation rate and excellent delivery of nucleic acids, and to provide lipid particles that can achieve a high nucleic acid encapsulation rate and excellent delivery of nucleic acids. According to an aspect of the present invention, a compound represented by Formula (1) or a salt thereof is provided.

Abstract: In a process for producing an iodo-aromatic compound which comprises iodinating an aromatic compound having an electron-donating substituent bonded to the benzene ring with iodine in the presence of a solvent, the improvement wherein about 1/2 to about 10 moles, per mole of iodine added to the reaction system, of nitrogen dioxide (NO.sub.2) is added in the form of NO.sub.2 to the reaction system, and the reaction is carried out in the presence of nitrogen dioxide.

Abstract: Both cyclohexanone and alkyl-substituted or unsubstituted phenol are simultaneously produced, in a one step reaction, by oxidizing, in the liquid phase, an alkyl-substituted or unsubstituted phenylcyclohexane of the formula (I): ##STR1## wherein R represents either a hydrogen atom or a methyl radical with an oxidizing gas containing molecular oxygen therein in the presence of hydrogen bromide.