Abstract: An airbag device includes a seat frame that forms a skeleton of a vehicle seat on which an occupant of a vehicle sits; an airbag that is disposed on a backrest portion that supports a back of the occupant in the vehicle seat and that is deployed by supply of gas; and a gas generator that is disposed at a seating surface portion that supports buttocks of the occupant in the vehicle seat and that generates gas to be supplied to the airbag; where a part that is a portion of the seat frame and includes at least a portion of a back frame forming a skeleton of the backrest portion, is formed as a flow tube that connects to the airbag to supply gas generated by the gas generator to the airbag.

Abstract: The present invention provides a medium for inducing the differentiation of stem cells into mesodermal cells, the medium comprising a ROCK inhibitor, a bone morphogenetic protein (BMP), a fibroblast growth factor (FGF), and activin. The present invention also provides a method for producing mesodermal cells from stem cells using the medium, and method for producing cardiac progenitor cells or myocardiocytes from stem cells using the medium. The present invention furthermore provides a composition for assisting the induction of differentiation of stem cells into mesodermal cells, the composition comprising a ROCK inhibitor, a BMP, an FGF, and activin. The present invention additionally provides cell groups obtained by the above methods.