Abstract: A method for manufacturing a component made of a hard brittle material includes: a step of preparing a base material made of a hard brittle material; and a step of embossing the base material. A protrusion protruding in a first direction and a bottom surface surrounding the protrusion are formed on the base material by the embossing. The bottom surface extends in a plane defined by a second direction intersecting the first direction and a third direction intersecting the first direction and the second direction. The bottom surface and a side surface of the protrusion continuous with the bottom surface satisfy a relationship of z=Ax2?Bx in a cross section defined by the first direction and the second direction when the first direction is represented by z and the second direction is represented by x. A is 0.005 to 0.200 and B is 0.050 to 0.955.

Abstract: A barrel polishing apparatus according to an aspect includes a fixed tank and a rotary disk that define a polishing space. The fixed tank has a predetermined axis as a center axis. The fixed tank includes a cylindrical rigid body and a first lining covering an inner circumferential surface of the cylindrical rigid body. The rotary disk has a disk-shaped rigid body and a second lining covering a surface of the disk-shaped rigid body on the polishing space side, and is rotatably disposed in a state where a gap is formed between the first lining and the second lining. The disk-shaped rigid body has a convex portion protruding toward the polishing space along a predetermined axis direction. The length in the predetermined axis direction of the part overlapping the gap of the convex portion is one-third or more of the length in the predetermined axis direction of the gap.

Abstract: A method for removing hard adhered objects is provided whereby adhered objects adhering to a jig in a film deposition process using crystal growth are efficiently removed while reducing damage to the jig. This adhered object removal method includes a step for preparing a jetting media with a lower hardness than the jig, a step for jetting the jetting media toward the jig, and a step for forming fracture starting points at the crystal grain boundary of the adhered object when the jetting media collides with the jig, then causing further collision of jetting media to cause the adhered object to dislodge at the crystal grain boundary.

Abstract: It is intended to provide a method of screening a so-called Tc inducible gene expressing cell line, in which the expression of a gene of interest is regulated depending on the presence/absence of a Tc compound regardless of the type of cell, easily with high efficiency. A gene-of-interest expression vector for transfecting a gene of interest into the genome of a host cell and a TA expression vector that expresses a transactivator that is switched to be bound or not to be bound to a tet operator sequence depending on the presence or absence of tetracycline are prepared. The gene-of-interest expression vector is a vector with a bicistronic regulatory sequence arranged downstream of the tet operator sequence and promoter sequence and between a gene-of-interest coding sequence and a selection marker coding sequence. These vectors are transfected into a host cell, and cell lines in which the selection marker of the gene-of-interest expression vector is expressed are selected.