GB2314035A - Dielectrophoresis - Google Patents

Dielectrophoresis

Info

Publication number
GB2314035A
GB2314035A GB9716710A GB9716710A GB2314035A GB 2314035 A GB2314035 A GB 2314035A GB 9716710 A GB9716710 A GB 9716710A GB 9716710 A GB9716710 A GB 9716710A GB 2314035 A GB2314035 A GB 2314035A
Authority
GB
United Kingdom
Prior art keywords
dielectrophoresis
methods
sample material
microorganisms
foodstuffs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9716710A
Other versions
GB9716710D0 (en
Inventor
Pradip Patel
David Pimbley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minister of Agriculture Fisheries and Food UK
Original Assignee
Minister of Agriculture Fisheries and Food UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minister of Agriculture Fisheries and Food UK filed Critical Minister of Agriculture Fisheries and Food UK
Publication of GB9716710D0 publication Critical patent/GB9716710D0/en
Publication of GB2314035A publication Critical patent/GB2314035A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C5/00—Separating dispersed particles from liquids by electrostatic effect
    • B03C5/005—Dielectrophoresis, i.e. dielectric particles migrating towards the region of highest field strength
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
    • C12Q1/24—Methods of sampling, or inoculating or spreading a sample; Methods of physically isolating an intact microorganisms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Food Science & Technology (AREA)
  • Zoology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Wood Science & Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Electrochemistry (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Biophysics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • Genetics & Genomics (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

Abstract

Methods and apparatus for the concentration of microorganisms, particularly bacteria, from sample material particularly from complex sample material and more particularly from foodstuff derived materials, comprise use of desalting means to reduce its conductivity to below 1000 ~S/cm 2 followed by dielectrophoresis. Methods of assaying microorganisms, and producing approved batches of foodstuffs are also disclosed.
GB9716710A 1995-02-21 1996-02-21 Dielectrophoresis Withdrawn GB2314035A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9503436.9A GB9503436D0 (en) 1995-02-21 1995-02-21 Dielectrophoresis
PCT/GB1996/000415 WO1996025998A1 (en) 1995-02-21 1996-02-21 Dielectrophoresis

Publications (2)

Publication Number Publication Date
GB9716710D0 GB9716710D0 (en) 1997-10-15
GB2314035A true GB2314035A (en) 1997-12-17

Family

ID=10769995

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9503436.9A Pending GB9503436D0 (en) 1995-02-21 1995-02-21 Dielectrophoresis
GB9716710A Withdrawn GB2314035A (en) 1995-02-21 1996-02-21 Dielectrophoresis

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9503436.9A Pending GB9503436D0 (en) 1995-02-21 1995-02-21 Dielectrophoresis

Country Status (6)

Country Link
EP (1) EP0810900A1 (en)
JP (1) JPH11501210A (en)
AU (1) AU4728696A (en)
CA (1) CA2213458A1 (en)
GB (2) GB9503436D0 (en)
WO (1) WO1996025998A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074463A1 (en) * 2003-02-19 2004-09-02 Waseda University Hydrogel for cell separation and method of separating cells

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002153297A (en) * 2000-11-24 2002-05-28 Matsushita Electric Ind Co Ltd Method for counting microorganisms and microorganisms counter with pretreatment device
US20080044880A1 (en) * 2006-08-21 2008-02-21 Samsung Electronics Co., Ltd. Method of and apparatus for separating microorganisms from sample using electrodialysis and microorganism capturing means
US8702947B2 (en) 2009-02-10 2014-04-22 Panasonic Corporation Device and method for measuring microspheres
US20140367260A1 (en) * 2013-06-14 2014-12-18 Nanophoretics Llc Method and Apparatus for Identifying Objects in a Plurality of Objects Using Dielectrophoresis

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD136895A1 (en) * 1978-06-02 1979-08-01 Roland Glaser METHOD FOR SEPARATING BIOLOGICAL PARTICLE MIXTURES BY DIELECTROPHORESIS
GB2071843A (en) * 1979-12-31 1981-09-23 Pohl H A Continuous dielectrophoretic cell classification
EP0214340A2 (en) * 1985-09-09 1987-03-18 BioControl Systems, Inc. Process for detection of selected motile organisms
WO1991008284A1 (en) * 1989-11-27 1991-06-13 National Research Development Corporation Dielectrophoretic characterisation of microorganisms and other particles
WO1993020927A1 (en) * 1992-04-16 1993-10-28 British Technology Group Ltd. Apparatus for separating a mixture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD136895A1 (en) * 1978-06-02 1979-08-01 Roland Glaser METHOD FOR SEPARATING BIOLOGICAL PARTICLE MIXTURES BY DIELECTROPHORESIS
GB2071843A (en) * 1979-12-31 1981-09-23 Pohl H A Continuous dielectrophoretic cell classification
EP0214340A2 (en) * 1985-09-09 1987-03-18 BioControl Systems, Inc. Process for detection of selected motile organisms
WO1991008284A1 (en) * 1989-11-27 1991-06-13 National Research Development Corporation Dielectrophoretic characterisation of microorganisms and other particles
WO1993020927A1 (en) * 1992-04-16 1993-10-28 British Technology Group Ltd. Apparatus for separating a mixture

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Chem Abs, Vol 122, April 1995, p870, No185 486s, G H MARX etal *
Chem Abs, Vol 122, April 1995, p880, No185 629r, W B BETTS *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074463A1 (en) * 2003-02-19 2004-09-02 Waseda University Hydrogel for cell separation and method of separating cells

Also Published As

Publication number Publication date
WO1996025998A1 (en) 1996-08-29
JPH11501210A (en) 1999-02-02
EP0810900A1 (en) 1997-12-10
AU4728696A (en) 1996-09-11
GB9503436D0 (en) 1995-04-12
CA2213458A1 (en) 1996-08-29
GB9716710D0 (en) 1997-10-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)