Title:
【発明の名称】保持方法および装置
Document Type and Number:
Japanese Patent JP2702168
Kind Code:
B2
Abstract:
Particulate material is supported in a fluid medium by means of an ultrasonic standing wave while a reaction is effected or controlled involving the material so supported, for example with the fluid medium or other material contained in the medium. In a preferred arrangement, the standing wave is established by opposed ultrasonic transducers (304,305,306) producing convergent beams that compensate for attenuation of the ultrasonic energy in the fluid medium, and operating in the near field. The support provided by the standing wave is able to avoid settling of the particulate material in the medium and also agitates the material; both effects enhance the rate of chemical reaction and help to ensure that the particulate material is more uniformly exposed. The process has particular applications to biological reactions, such as fermentation, and to chromatography, as examples.
Inventors:
Cornelius Jion Shrum
Application Number:
JP19700688A
Publication Date:
January 21, 1998
Filing Date:
August 05, 1988
Export Citation:
Assignee:
British Technology Group Limited
International Classes:
B01D15/08; B01J19/00; B01J19/10; B01J8/00; C12M1/40; G01N30/02; (IPC1-7): B01J19/10; B01J8/00; B01J19/00
Domestic Patent References:
| JP63503370A | ||||
| JP6150655A | ||||
| JP61500278A | ||||
| JP5252464A |
Other References:
Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ａｃｏｕｓｔｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ａｍｅｒｉｃａ［６］Ｄｅｃｅｍｂｅｒ １９８４（米）第１８６４−１８６６
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)