GB1487775A - Apparatus for measuring changes in absorbance per unit time - Google Patents

Apparatus for measuring changes in absorbance per unit time

Info

Publication number
GB1487775A
GB1487775A GB55541/74A GB5554174A GB1487775A GB 1487775 A GB1487775 A GB 1487775A GB 55541/74 A GB55541/74 A GB 55541/74A GB 5554174 A GB5554174 A GB 5554174A GB 1487775 A GB1487775 A GB 1487775A
Authority
GB
United Kingdom
Prior art keywords
sample
counter
digital signal
circuit
signal
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.)
Expired
Application number
GB55541/74A
Other languages
English (en)
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.)
Micromedic Systems Inc
Original Assignee
Micromedic Systems Inc
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 Micromedic Systems Inc filed Critical Micromedic Systems Inc
Publication of GB1487775A publication Critical patent/GB1487775A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/272—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration for following a reaction, e.g. for determining photometrically a reaction rate (photometric cinetic analysis)
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/62—Performing operations exclusively by counting total number of pulses ; Multiplication, division or derived operations using combined denominational and incremental processing by counters, i.e. without column shift

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Computational Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB55541/74A 1974-02-19 1974-12-23 Apparatus for measuring changes in absorbance per unit time Expired GB1487775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443532A US3901600A (en) 1974-02-19 1974-02-19 Apparatus for measuring enzyme concentrations using an optical instrument such as a spectrophotometer

Publications (1)

Publication Number Publication Date
GB1487775A true GB1487775A (en) 1977-10-05

Family

ID=23761161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55541/74A Expired GB1487775A (en) 1974-02-19 1974-12-23 Apparatus for measuring changes in absorbance per unit time

Country Status (9)

Country Link
US (1) US3901600A (US07709020-20100504-C00041.png)
JP (1) JPS50120396A (US07709020-20100504-C00041.png)
CA (1) CA1021960A (US07709020-20100504-C00041.png)
CH (1) CH597598A5 (US07709020-20100504-C00041.png)
DE (1) DE2506357A1 (US07709020-20100504-C00041.png)
FR (1) FR2261522B1 (US07709020-20100504-C00041.png)
GB (1) GB1487775A (US07709020-20100504-C00041.png)
NL (1) NL7501986A (US07709020-20100504-C00041.png)
SE (1) SE398395B (US07709020-20100504-C00041.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000284A (en) * 1977-06-20 1979-01-04 Coulter Electronics Monitoring chemical reaction photoelectrically

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035087A (en) * 1974-12-26 1977-07-12 Nippon Kogaku K.K. Chemical reaction velocity measuring apparatus
JPS5247345B2 (US07709020-20100504-C00041.png) * 1974-12-26 1977-12-01
JPS51100793A (en) * 1975-03-03 1976-09-06 Nippon Kogaku Kk Kagakuhannosokudosokuteisochi
GB1559810A (en) * 1975-11-05 1980-01-30 Nat Res Dev Device for measuring light received from an illuminated material
JPS54108693A (en) * 1978-02-14 1979-08-25 Mitsubishi Chem Ind Method and device for optically measuring antigennantibody reaction
US4293222A (en) * 1978-02-27 1981-10-06 Baxter Travenol Laboratories, Inc. Control apparatus for spectrophotometer
US4521115A (en) * 1982-05-21 1985-06-04 Mcdonnell Douglas Corporation Pulse coded optical attenuation meter
FR2556528A1 (fr) * 1983-12-09 1985-06-14 Enertec Procede et dispositif de conversion d'un signal analogique
US4599001A (en) * 1984-05-02 1986-07-08 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Multispectral linear array multiband selection device
WO1998044475A1 (fr) 1997-03-31 1998-10-08 Idec Izumi Corporation Dispositif d'affichage et d'eclairage
US6132922A (en) * 1999-01-06 2000-10-17 Advanced Color Technology, Inc. Liquid developer for electrophotographic printing apparatus
GB9921972D0 (en) 1999-09-16 1999-11-17 Univ Ottawa Apparatus for laser flash photolysis
DE102007020544A1 (de) * 2007-04-25 2008-10-30 Siemens Ag Analysevorrichtung bzw. Verfahren zur Untersuchung der katalytischen Aktivität von Oberflächen
US11307094B2 (en) * 2019-05-28 2022-04-19 The Regents Of The University Of California System and method for hyperspectral imaging in highly scattering media by the spectral phasor approach using two filters
CN113805642A (zh) * 2021-08-09 2021-12-17 华南理工大学 生化反应计算机的时钟振荡器
CN113484314A (zh) * 2021-08-16 2021-10-08 智锐达仪器科技南通有限公司 用于农药残留检测仪的检测方法及农药残留检测仪

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664744A (en) * 1969-09-02 1972-05-23 Smith Kline Instr Log ratio circuit for double beam spectrophotometers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000284A (en) * 1977-06-20 1979-01-04 Coulter Electronics Monitoring chemical reaction photoelectrically
GB2000284B (en) * 1977-06-20 1982-03-31 Coulter Electronics Apparatus and methods for monitoring chemical reactions

Also Published As

Publication number Publication date
US3901600A (en) 1975-08-26
SE7501739L (US07709020-20100504-C00041.png) 1975-08-20
FR2261522A1 (US07709020-20100504-C00041.png) 1975-09-12
JPS50120396A (US07709020-20100504-C00041.png) 1975-09-20
CA1021960A (en) 1977-12-06
DE2506357A1 (de) 1975-09-18
FR2261522B1 (US07709020-20100504-C00041.png) 1977-11-25
NL7501986A (nl) 1975-08-21
SE398395B (sv) 1977-12-19
CH597598A5 (US07709020-20100504-C00041.png) 1978-04-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee