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US5108907A Expired / Lapsed US ⏱️ 0.0 years remaining

Laser doppler spectrometer for the statistical study of the behavior of microscopic organisms

Assignee: DELAWARE A NON-PROFIT ORG, University of
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Filing: 1984-09-17
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Granted: 1992-04-28
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Expires: 2004-09-17
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Abstract

Abstract A differential laser Doppler biospectrometer for monitoring microbiota movement in a medium, which, preferably is quiescent. One of the laser beams is shifted in frequency to enable monitoring of small movement data velocity and/or direction). Average size of individuals and growth rate of the total number of organisms in suspension can be obtained. Exogenous stimuli, such as electric and magnetic fields, trace chemical additions or EM radiation are provided at selected times in the natural rhythm circadian cycle of the microbiota, and several such stimuli can be applied simultaneously. The measurement system is so sensitive that it can detect movement changes due to very weak energy stimuli transmitted to microbiota free to move in an established zone. In addition, holographic recordings of the microbiota can be made.

Inventors

  • 👤 C. M. Pleass
  • 👤 Dean Dey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 11:54
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; C; C12; C12M; C12M41/00; C12M41/30; C12M41/36; G01P; G01P5/00; G01P5/26

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 67 words
A method of obtaining data on live microbiota, comprising, a) making a record of the natural rhythm circadian cycle of said live microbiota, b) at selected points in said rhythm circadian cycle subjecting said microbiota to a predetermined exogenous stimuli, and c) recording any change in the physical movements of the body and portions thereof of said microbiota, during application of said stimuli, by laser light scattering.
Claim 2
Independent Claim 67 words
A method of obtaining data on live microbiota, comprising, a) making a record of the natural rhythm circadian cycle of said live microbiota, b) at selected points in said rhythm circadian cycle subjecting said microbiota to a predetermined exogenous stimuli, and c) recording any change in the physical movements of the body and portions thereof of said microbiota, during application of said stimuli, by laser light scattering.
Claim 3
Dependent Claim 35 words
The method defined in claim 1 wherein said laser light scattering uses a pair of laser light beams, one of which has been shifted a predetermined frequency related to the body movements of the microbiota.
Claim 4
Independent Claim 235 words
A method of measuring movement of a live microbiota in a fluid medium comprising: allowing said live microbiota to move in said fluid medium of its own volition, directing at least a part of laser energy beams of the same predetermined frequency along separate paths, respectively, shifting the frequency of one of said radiant energy beams a predetermined amount relative to the other of said radiant energy beams, projecting a first of said radiant energy beams through said fluid medium at a predetermined zone, projecting a second beam of said pair of radiant energy beams through said fluid medium and said predetermined zone and at a predetermined angle relative to said first beam of radiant energy, periodically applying exogenous stimuli to said microbiota, controlling the periodic application of an exogenous stimuli at selected points in the natural rhythm circadian cycle of said microbiota from one or more exogenous stimuli selected from the group consisting of: a) a magnetic field, b) an electric field, c) complex electromagnetic fields including fields produced by a spark discharge, d) variable intensity/wavelength light in the visible spectrum, e) x-rays, f) ultraviolet light, g) infrared light, h) chemical stimuli, i) pressure, j) sonic, k) radio frequency, and l) thermal; transducing the radiant energy scattered from said predetermined zone to electronic data signals characteristic of the velocity and direction of movement of various movements of said live microbiota in said fluid medium.
Claim 5
Independent Claim 235 words
A method of measuring movement of a live microbiota in a fluid medium comprising: allowing said live microbiota to move in said fluid medium of its own volition, directing at least a part of laser energy beams of the same predetermined frequency along separate paths, respectively, shifting the frequency of one of said radiant energy beams a predetermined amount relative to the other of said radiant energy beams, projecting a first of said radiant energy beams through said fluid medium at a predetermined zone, projecting a second beam of said pair of radiant energy beams through said fluid medium and said predetermined zone and at a predetermined angle relative to said first beam of radiant energy, periodically applying exogenous stimuli to said microbiota, controlling the periodic application of an exogenous stimuli at selected points in the natural rhythm circadian cycle of said microbiota from one or more exogenous stimuli selected from the group consisting of: a) a magnetic field, b) an electric field, c) complex electromagnetic fields including fields produced by a spark discharge, d) variable intensity/wavelength light in the visible spectrum, e) x-rays, f) ultraviolet light, g) infrared light, h) chemical stimuli, i) pressure, j) sonic, k) radio frequency, and l) thermal; transducing the radiant energy scattered from said predetermined zone to electronic data signals characteristic of the velocity and direction of movement of various movements of said live microbiota in said fluid medium.
Claim 6
Dependent Claim 26 words
The method defined in claim 3 including providing a microprocessor and controlling the periodic application of one or more of said exogenous stimuli by said microprocessor.
Claim 7
Dependent Claim 40 words
The method of measuring movement of live microbiota as defined in claim 3 including providing a solid state laser as the source of said pair of radiant energy beams and providing fiber optic coupling elements to constitute said separate paths.
Claim 8
Independent Claim 119 words
A method of monitoring a fluid medium having live microbiota therein, comprising, projecting a plurality of pairs of laser beams along separate paths, each beam of a pair having the same frequency, optically shifting the frequency of one beam of each of said plurality of pairs of laser beams a predetermined amount relative to the other laser beam of a pair, converging all of said beams to a measuring volume of said fluid medium common to all said laser beams, and detecting of changes in movement of the of various movements associated with said microbiota in said medium by transducing the radiant energy scattered from said measuring volume by each of said pair of beams to electronic signals, respectively.
Claim 9
Independent Claim 119 words
A method of monitoring a fluid medium having live microbiota therein, comprising, projecting a plurality of pairs of laser beams along separate paths, each beam of a pair having the same frequency, optically shifting the frequency of one beam of each of said plurality of pairs of laser beams a predetermined amount relative to the other laser beam of a pair, converging all of said beams to a measuring volume of said fluid medium common to all said laser beams, and detecting of changes in movement of the of various movements associated with said microbiota in said medium by transducing the radiant energy scattered from said measuring volume by each of said pair of beams to electronic signals, respectively.
Claim 10
Independent Claim 80 words
A method of measuring pollution using live microbiota, comprising, a) allowing said live microbiota to move in a fluid medium subject to pollution, b) subjecting said live microbiota to a pair of converged laser beams, and detecting movements thereof by laser light scattering, c) applying a pollution stimulus to said live microbiota, and d) detecting any change in the physical movements of the body and portions thereof of said live microbiota during application of said stimuli by laser light scattering.
Claim 11
Independent Claim 80 words
A method of measuring pollution using live microbiota, comprising, a) allowing said live microbiota to move in a fluid medium subject to pollution, b) subjecting said live microbiota to a pair of converged laser beams, and detecting movements thereof by laser light scattering, c) applying a pollution stimulus to said live microbiota, and d) detecting any change in the physical movements of the body and portions thereof of said live microbiota during application of said stimuli by laser light scattering.
Claim 12
Independent Claim 126 words
A method of identifying an unknown microbiota species in a sample comprising: A. establishing a library of velocity spectra for a plurality of known microbiota species by 1) monitoring the velocity spectra of said known microbiota species, with and without one or more selected exogenous predetermined stimuli applied by a laser droppler, 2) recording each monitored velocity spectra to form said library of velocity spectra, B. monitoring the velocity spectra of said unknown microbiota species with a laser dropper and in a sample under the same conditions of selected predetermined exogenous stimuli used to form said library, C. comparing the resulting velocity spectra of said unknown microbiota species with said library of velocity spectra to correlate the velocity spectra features and identify said unknown microbiota species.
Claim 13
Independent Claim 126 words
A method of identifying an unknown microbiota species in a sample comprising: A. establishing a library of velocity spectra for a plurality of known microbiota species by 1) monitoring the velocity spectra of said known microbiota species, with and without one or more selected exogenous predetermined stimuli applied by a laser droppler, 2) recording each monitored velocity spectra to form said library of velocity spectra, B. monitoring the velocity spectra of said unknown microbiota species with a laser dropper and in a sample under the same conditions of selected predetermined exogenous stimuli used to form said library, C. comparing the resulting velocity spectra of said unknown microbiota species with said library of velocity spectra to correlate the velocity spectra features and identify said unknown microbiota species.
Claim 14
Dependent Claim 33 words
The method of identifying an unknown microbiota in a sample as defined in claim 8 wherein step A.1) is performed at selected times in the natural rhythm circadian cycle of each microbiota species.

References Cited (Backward Citations)

US4061543A Cited
US4577963A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-04-28 1995-10-28 1996-04-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-04-28 1999-10-28 2000-04-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-04-28 2003-10-28 2004-04-28 $7700.00 Window Closed / Lapsed

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