Abstract: An operation of designing or selecting chemical structure information on a lipid molecule forming a particle encapsulating an active ingredient is supported. An inference device includes an acquiring unit configured to acquire input data including at least chemical structure information on a lipid molecule, and a learned model generated by performing a learning process on a learning model that associates input data including at least chemical structure information on a lipid molecule with a transfection efficiency of an active ingredient encapsulated in a particle containing the lipid molecule into a cell and/or a cell survival rate. The learned model infers a transfection efficiency and/or a cell survival rate associated with the input data newly acquired by the acquiring unit.

Abstract: The portions at the circumferential edges of a flow channel formation plate in which the corner portions of a dummy flow channel portion are formed are weaker than other portions, and thus when thermal stress has occurred due to temperature changes when the constituent elements of a flow channel unit are affixed to each other, cracks can be induced preferentially in the weak portion, rather than the other portions, starting from the ends of the corner portions. In particular, although similar corner portions are formed in a common liquid chamber, the intersection angle of the corner portions in the dummy flow channel portion is smaller than the intersection angle of the corner portions in the common liquid chamber, and thus it is easier for stress to concentrate in the corner portions of the dummy flow channel portion.

Abstract: The portions at the circumferential edges of a flow channel formation plate in which the corner portions of a dummy flow channel portion are formed are weaker than other portions, and thus when thermal stress has occurred due to temperature changes when the constituent elements of a flow channel unit are affixed to each other, cracks can be induced preferentially in the weak portion, rather than the other portions, starting from the ends of the corner portions. In particular, although similar corner portions are formed in a common liquid chamber, the intersection angle of the corner portions in the dummy flow channel portion is smaller than the intersection angle of the corner portions in the common liquid chamber, and thus it is easier for stress to concentrate in the corner portions of the dummy flow channel portion.

Abstract: A liquid ejecting head includes an ink jet recording head body that ejects ink and a head formed of a resin with a reinforcement member integrally molded therein and having a housing, wherein the head includes a groove in which a part of the reinforcement member is exposed to the bottom surface, and a liquid hold that holds ink and is disposed at the lower end of the groove in the vertical direction.