Showa Denko K.k.

Sumitomo Metal Industries, Inc.

Kayaba Kogyo Kabushiki Kaisha

Ryuji Takahashi

Akira Sakamoto

Hideyuki Kondo

Junya Kato

Toshiji Takigawa

Provided is a packing material for HILIC columns for more accurately and more easily performing oligosaccharide analysis by liquid chromatography; an HILIC column which is filled with the packing material for HILIC columns; and a method for analyzing an oligosaccharide with use of this packing material for HILIC columns A packing material for HILIC columns according to the present invention is composed of particles, each of which is obtained by reacting glycidol to a hydroxyl group of a porous cross-linked polymer base material having the hydroxyl group, and which have a hydrophilicity index of 2.30 or more and a surface-pH index of from 0.95 to 1.05.

Packing material for HILIC columns, HILIC column filled with same, and method for analyzing oligosaccharide with use of same

A control system for a superhigh pressure generation circuit includes a hydraulic pump having a usual range of delivery pressure. An electrohydraulic servo valve controls the flow rate of pressurized fluid from the pump and supplies it to a primary side of a boost cylinder. A stepped piston slidably received in the boost cylinder strokes in response to the input fluid to generate a fluid pressure elevated in accordance with an effective sectional area ratio of the stepped piston in a secondary side of the boost cylinder. The fluid pressure in the secondary side is caused to coincide accurately with a reference pressure level on the basis of a feedback control.

Control system for superhigh pressure generation circuit

Growing community of inventors

Tokyo, Japan

Ryuji Takahashi