DE19946656A1 - Production of biologically activated magnetic particles, useful for detection and quantification of e.g. bacteria, by attachment of specific antibody - Google Patents
Production of biologically activated magnetic particles, useful for detection and quantification of e.g. bacteria, by attachment of specific antibodyInfo
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- DE19946656A1 DE19946656A1 DE19946656A DE19946656A DE19946656A1 DE 19946656 A1 DE19946656 A1 DE 19946656A1 DE 19946656 A DE19946656 A DE 19946656A DE 19946656 A DE19946656 A DE 19946656A DE 19946656 A1 DE19946656 A1 DE 19946656A1
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- 238000001514 detection method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 241000894006 Bacteria Species 0.000 title description 12
- 239000006249 magnetic particle Substances 0.000 title description 2
- 238000011002 quantification Methods 0.000 title 1
- 239000002245 particle Substances 0.000 claims abstract description 42
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 22
- 239000000523 sample Substances 0.000 claims abstract description 16
- 239000011859 microparticle Substances 0.000 claims abstract description 7
- 241000700605 Viruses Species 0.000 claims abstract description 6
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 6
- 125000006850 spacer group Chemical group 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 108091034117 Oligonucleotide Proteins 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 8
- 239000004809 Teflon Substances 0.000 claims description 7
- 229920006362 Teflon® Polymers 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 2
- 102000004169 proteins and genes Human genes 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 108090000565 Capsid Proteins Proteins 0.000 abstract 1
- 102100023321 Ceruloplasmin Human genes 0.000 abstract 1
- 230000003612 virological effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000005291 magnetic effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 210000000601 blood cell Anatomy 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001900 immune effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 101710132601 Capsid protein Proteins 0.000 description 1
- 101710094648 Coat protein Proteins 0.000 description 1
- 102100021181 Golgi phosphoprotein 3 Human genes 0.000 description 1
- 101710125418 Major capsid protein Proteins 0.000 description 1
- 101710141454 Nucleoprotein Proteins 0.000 description 1
- 101710083689 Probable capsid protein Proteins 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000684 flow cytometry Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 201000009482 yaws Diseases 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
-
- 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
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
- G01N33/54326—Magnetic particles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/01—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials specially adapted for biological cells, e.g. blood cells
- G01N2015/019—Biological contaminants; Fouling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/0098—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor involving analyte bound to insoluble magnetic carrier, e.g. using magnetic separation
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Molecular Biology (AREA)
- Urology & Nephrology (AREA)
- Biotechnology (AREA)
- Cell Biology (AREA)
- Microbiology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren für die Darstellung von biologisch aktivierten ferromagnetischen Partikeln. Zu dem betrifft die Erfindung eine Vorrichtung zum Nachweis und Zählen von suspendierten biologischen Mikropartikeln in flüssigen Proben, insbesondere zum Durchführen des genann ten Verfahrens.The invention relates to a method for the representation of biologically activated ferromagnetic particles. To the invention relates to a device for detection and counting suspended biological microparticles in liquid samples, especially for performing the genann procedure.
Das Zählen von Bakterien, Blutzellen oder Zellbestandteilen in wässrigen Lösungen erfolgt bisher mittels Durch flusszytometer oder Coultercounter. Hier werden die ent sprechenden Partikel gefärbt und anhand von optischen Signalen identifiziert oder durch kapazitive Messungen ge zählt.Counting bacteria, blood cells or cell components So far, in aqueous solutions by means of flow cytometer or coulter counter. Here are the ent speaking particles colored and based on optical Signals identified or ge by capacitive measurements counts.
In Kenntnis dieser Gegebenheiten hat sich der Erfinder das Ziel gesetzt, derartige Messungen zu vereinfachen.Knowing these facts, the inventor did it The goal is to simplify such measurements.
Zur Lösung dieser Aufgabe führt die Lehre des unabhängigen Anspruches; die Unteransprüche geben günstige Weiterbildun gen an. Zudem fallen in den Rahmen der Erfindung alle Kom binationen aus zumindest zwei der in der Beschreibung, der Zeichnung und/oder den Ansprüchen offenbarten Merkmalen.The teaching of the independent leads to the solution of this task Claim; the subclaims give favorable further training to. In addition, all com fall within the scope of the invention binations from at least two of the ones in the description, the Drawing and / or the features disclosed in the claims.
Erfindungsgemäß werden monovalente primäre Antikörper mit ferromagnetischen Partikeln in mehrfachem Überschuss ge mischt, welche mit sekundären Antikörpern beschichtet sind; anschließend werden mittels partieller Sedimentation in einer Zentrifuge aggregierte Partikel abgetrennt, die aus einem monovalenten primären Antikörper und antikörperbe schichteten ferromagnetischen Teilpartikeln bestehen. An stelle primärer Antikörper können auch Viren oder Gensonden verwendet werden, gegen deren Hüllproteine bzw. Spacer moleküle die sekundären Antikörper gerichtet sind. According to the invention, monovalent primary antibodies are used Ferromagnetic particles in multiple excess mixes which are coated with secondary antibodies; then, by means of partial sedimentation in a centrifuge separated aggregate particles that from a monovalent primary antibody and antibody layered ferromagnetic partial particles exist. On Instead of primary antibodies, viruses or gene probes can also be used are used against their coat proteins or spacers molecules the secondary antibodies are directed.
Nach einem weiteren Merkmal der Erfindung können die biolo gischen Partikel immunologisch, phagologisch oder mole kularbiologisch mit Partikeln verbunden werden, die beim anschließenden Durchströmen einer Metallspule messbare und zählbare Induktivitätsänderungen auslösen.According to a further feature of the invention, the biolo gische particles immunological, phagological or mole are biologically connected with particles that subsequent flow through a metal coil measurable and trigger countable changes in inductance.
Auch hat es sich als günstig erwiesen, induktivitätsän dernde, ferromagnetische Partikel vor dem Durchströmen der Metallspule mittels Elektromagnet in einer Kunststoffkapil lare festzuhalten und dort mit den in die Kapillare ein strömenden biologischen Mikropartikeln zu verbinden, wäh rend die Probe, in welcher diese enthalten waren, aus der Kapillare herausgeführt wird. Zudem sollen durch die Me tallspule als Teil eines elektronischen Schwingkreises zählbare Änderungen der Eigenschwingfrequenz erzeugt werden.It has also proven to be cheap, inductive changing ferromagnetic particles before flowing through the Metal coil using an electromagnet in a plastic cap hold on and insert them into the capillary to combine flowing biological microparticles while rend the sample in which they were contained from the Capillary is led out. In addition, the Me tall coil as part of an electronic resonant circuit generates countable changes in the natural oscillation frequency become.
Um den apparativen Aufwand bei der optischen Messung zu um gehen und eine höhere Spezifität gegenüber der kapazitiven Messung zu erreichen, wird also für den Nachweis des ein zelnen Partikels ein geändertes Messprinzip eingesetzt: Die Messung der Induktivitätsänderung einer Mikrospule aus Me tall. Da biologische Partikel aber eine Permeabilitätskon stante µ von annähernd 1 haben, müssen diese zum Nachweis und zur Zählung mittels Spule zuvor mit induktivitäts ändernden Substanzen markiert werden. Diese Markierung ge schieht durch die immunologische, phagologische oder mole kularbiologische Ankopplung von ferromagnetischen Parti keln, welche monovalent entweder mit Antikörpern, mit Virus-Andockmolekülen oder mit Gensonden an Spacermolekülen verbunden sind.In order to reduce the expenditure on equipment for optical measurement go and have a higher specificity to the capacitive Reaching measurement is therefore used for the detection of a used a different measuring principle for individual particles: the Measurement of the change in inductance of a micro coil made of Me tall. Since biological particles have a permeability con constant µ of approximately 1, they must be used for verification and for counting by means of a coil beforehand with inductivity changing substances are marked. This mark ge shoots through the immunological, phagological or mole biological biological coupling of ferromagnetic parts which are monovalent with either antibodies with Virus docking molecules or with gene probes on spacer molecules are connected.
Die Ankopplung der ferromagnetischen Marker geschieht in einer Vorrichtung, welche gleichzeitig eine Anreicherung der zu zählenden Partikel ermöglicht: Die Marker werden in einer Teflonkapillare mittels eines Elektromagneten als Sorptions-Schicht festgehalten, bis die gesamte Probe in die Kapillare gepumpt wurde und gleichzeitig die überschüs sige Probe aus der Kapillare herausgelaufen ist. Hierauf wird der Magnet ausgeschaltet, damit die Marker frei dif fundieren und die Oberfläche der biologischen Partikel sättigen können. Darauf wird der Kapillaren-Inhalt mit einer piezoelektrischen Pumpe durch eine Metallspule ge pumpt, die als Spirale auf eine Leiterplatte geätzt wurde und mit Kondensator und Widerstand als Schwingkreis ge schaltet ist. Der Schwingkreis wird mit einer Frequenz an geregt, die derjenigen Eigenschwingfrequenz entspricht, welche generiert wird, wenn sich ein durchschnittlich mar kierter biologischer Mikropartikel in der Spule befindet. Dadurch entsteht im Schwingkreis immer dann eine Resonanz schwingung, wenn ein entsprechender Mikropartikel durch die Spule tritt.The ferromagnetic markers are coupled in a device which is simultaneously an enrichment of the particles to be counted: The markers are in a Teflon capillary using an electromagnet as Sorption layer held until the entire sample is in the capillary was pumped and at the same time the excess sample has run out of the capillary. On that the magnet is switched off so that the markers are free dif base and the surface of the biological particles can saturate. Then the capillary content is added a piezoelectric pump through a metal coil pumps, which was etched as a spiral on a circuit board and ge with capacitor and resistor as a resonant circuit is switched. The resonant circuit is at a frequency excited, which corresponds to that natural oscillation frequency, which is generated when an average mar biological microparticles in the coil. This always creates a resonance in the resonant circuit vibration when a corresponding microparticle passes through the Coil occurs.
Ein Beispiel für die Anwendung dieses Verfahrens ist der Nachweis von Kolibakterien in Wasserproben. Hierzu werden monovalente primäre E.-coli-spezifische Antikörper mit an magnetische Beads gekoppelten sekundären Antikörpern konju giert. Die Suspension dieser Konjugate wird in die Teflon- Kapillare gepumpt und mittels Elektromagnet dort fixiert. Beim Durchströmen der Kapillare mit der zu untersuchenden Wasserprobe werden Kolibakterien über die primären Antikör per an den Konjugaten festgehalten. Nach dem Abschalten des Magneten kann die Suspension von magnetisch markierten Kolibakterien durch die Messspule gepumpt werden. Die An zahl der Resonanz-Ereignisse im angeschlossenen Schwing kreis entspricht der Anzahl der Kolibakterien in der ur sprünglichen Wasserprobe. Durch den Einsatz dieses Gerätes und der entsprechenden Konjugate ist es möglich, ohne den aufwendigen Einsatz der Durchflusszytometrie Bakterien automatisch zu zählen. Des weiteren ist es möglich, mit dieser Messmethode eine Miniaturisierung des Nachweisgerä tes zu erreichen. An example of the application of this method is Detection of coli bacteria in water samples. To do this monovalent primary E. coli-specific antibodies magnetic beads coupled secondary antibodies konju yaws. The suspension of these conjugates is transferred to the Teflon Pumped capillary and fixed there by means of an electromagnet. When flowing through the capillary with the one to be examined Water sample will coli bacteria over the primary antibody attached to the conjugates. After switching off the Magnets can be the suspension of magnetically marked Coli bacteria are pumped through the measuring coil. The An number of resonance events in the connected oscillation circle corresponds to the number of coli bacteria in the original initial water test. By using this device and the corresponding conjugates, it is possible without the elaborate use of flow cytometry bacteria count automatically. It is also possible to use a miniaturization of the detection device to achieve it.
Mit der beschriebenen Technik werden Partikel wie Bakte rien, Zellen oder Zellbestandteile in wässrigen Lösungen nachgewiesen und gezählt. Diese Technik ermöglicht eine Mi niaturisierung des automatischen Partikelzählverfahrens. Dazu werden die Partikel vor der Messung durch die Reaktion mit monovalenten antikörper- bzw. virenbeschichteten ferro magnetischen Partikeln markiert. Die induktive Messung be ruht auf dem Passieren der mit den biologischen Partikeln aggregierten ferromagnetischen Partikel durch die Mikro spule eines elektronisches Schwingkreises. Die beim Passie ren auftretenden Resonanzereignisse werden gezählt.With the technique described, particles become like bacteria cells, cells or cell components in aqueous solutions proven and counted. This technology enables a Mi niaturization of the automatic particle counting process. To do this, the particles are measured before the reaction with monovalent ferro coated with antibodies or viruses marked magnetic particles. The inductive measurement be rests on passing through with the biological particles aggregated ferromagnetic particles through the micro coil of an electronic resonant circuit. The one at the Passie Any resonance events that occur are counted.
Die Vorrichtung kann in der Medizin, Mikrobiologie und Hygiene eingesetzt werden, beispielsweise zum Auszählen von Blutzellen; es können ökologisch relevante Mikroorganismen ausgezählt oder krankheitserregende Keime nachgewiesen werden. The device can be used in medicine, microbiology and Hygiene can be used, for example to count Blood cells; it can be ecologically relevant microorganisms counted or pathogens detected become.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines be vorzugten Ausführungsbeispieles sowie anhand der Zeichnung; diese zeigt inFurther advantages, features and details of the invention result from the following description of a be preferred embodiment and with reference to the drawing; this shows in
Fig. 1 ein Schema zu einem erfindungsgemäßen Verfahren; FIG. 1 is a schematic of a process of this invention;
Fig. 2 ein Detail der Fig. 1 in schematisierter Schrägsicht. Fig. 2 shows a detail of Fig. 1 in a schematic oblique view.
Vor einem Verfahren zum Nachweis von Kolibakterien in einer durch eine Leitung 10 zugeführten Wasserprobe Z werden mo novalente primäre E.-coli-spezifische Antikörper mit an ma gnetische Beads gekoppelten sekundären Antikörpern konju giert. Die Leitung für die monovalenten magnetischen Parti kel F ist mit 12 bezeichnet. Beide Leitungen 10, 12 enthal ten Schlauchpumpen 14 und vereinigen sich nach diesen zu einer gemeinsamen Förderleitung 16.Before a method for the detection of coli bacteria in a water sample Z fed through a line 10 , modern primary E. coli-specific antibodies are conjugated with secondary antibodies coupled to magnetic beads. The line for the monovalent magnetic Parti angle F is designated 12 . Both lines 10 , 12 contain th peristaltic pumps 14 and combine to form a common delivery line 16 .
Das Reagenz mit ferromagnetischen, biologisch aktivierten Partikeln wird über die Leitungen 12 und 16 in eine Teflonkapillare 20 gepumpt und dort mittels eines Elektro magneten 22 fixiert, dessen Magnetspule mit 24 bezeichnet und dem die Z-förmig aufgewickelte Teflonkapillare 20 in einem konzentrischen Polschuh 26 zugeordnet ist. Dieser begrenzt mit einem von ihm in Radialabstand umgebenen Polstift 28 einen Ringraum 30 für die Teflonkapillare.The reagent with ferromagnetic, biologically activated particles is pumped via the lines 12 and 16 into a Teflon capillary 20 and fixed there by means of an electric magnet 22 , the magnet coil of which is designated 24 and the Z-shaped wound Teflon capillary 20 in a concentric pole piece 26 is assigned . This delimits an annular space 30 for the Teflon capillary with a pole pin 28 surrounded by it at a radial distance.
Beim Durchströmen der Kapillare 20 mit der zu untersuchen den Wasserprobe Z werden Kolibakterien als zu zählende bio logische Partikel über die primären Antikörper an den fer romagnetischen Konjugaten festgehalten. Nach dem Abschalten des Elektromagneten 22 kann die Suspension von magnetisch markierten Kolibakterien dank einer Piezopumpe 32 in einer Messleitung 34 durch eine geätzte Metallspule als Messspule 36 einer mikrosystemtechnischen Einheit 40 transportiert werden. Aus dieser werden die gezählten Partikel in Pfeilrichtung X ausgetragen.When the water sample Z to be examined flows through the capillary 20, coli bacteria as biological particles to be counted are held onto the ferromagnetic conjugates via the primary antibodies. After the electromagnet 22 has been switched off , the suspension of magnetically marked coli bacteria can be transported in a measuring line 34 by means of a piezo pump 32 through an etched metal coil as a measuring coil 36 of a microsystem unit 40 . The counted particles are discharged from this in the direction of arrow X.
Die freien Enden 38, 38a der Messspule 36 sind - nach einem Widerstand 42 und einem Kondensator 44 - an eine Einrichtung 46 zum Anregen der Schwingung und zum Messen von Resonanzereignissen angeschlossen; dort erfolgt eine Umwandlung in Zählimpulse.The free ends 38 , 38 a of the measuring coil 36 are - after a resistor 42 and a capacitor 44 - connected to a device 46 for exciting the vibration and for measuring resonance events; there is a conversion into counts.
Die Anzahl der Resonanzereignisse im angeschlossenen Schwingkreis entspricht der Anzahl der Kolibakterien in der ursprünglichen Wasserprobe Z.The number of resonance events in the connected The resonant circuit corresponds to the number of coli bacteria in the original water sample Z.
Zwischen der Teflonkapillare 20 und der Piezopumpe 32 ist ein - ein Ventil 48 enthaltender - Leitungsabzweig 18 für überschüssige Probeanteile Q vorgesehen, dem in der För derleitung 16 ein Ventil 48 nachgeschaltet ist.Between the Teflon capillary 20 and the piezo pump 32 is a - a valve 48 containing - line branch 18 for excess sample Q is provided, which is connected in the För derleitung 16 a valve 48 .
Claims (12)
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DE19946656A DE19946656A1 (en) | 1999-02-17 | 1999-09-29 | Production of biologically activated magnetic particles, useful for detection and quantification of e.g. bacteria, by attachment of specific antibody |
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DE19906352A DE19906352A1 (en) | 1999-02-17 | 1999-02-17 | Apparatus to identify and count biological microparticles |
DE19946656A DE19946656A1 (en) | 1999-02-17 | 1999-09-29 | Production of biologically activated magnetic particles, useful for detection and quantification of e.g. bacteria, by attachment of specific antibody |
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DE19906352A Withdrawn DE19906352A1 (en) | 1999-02-17 | 1999-02-17 | Apparatus to identify and count biological microparticles |
DE19939208A Expired - Fee Related DE19939208C2 (en) | 1999-02-17 | 1999-08-18 | Process for displaying biologically activated inductivity-changing particles for their detection and counting and device therefor |
DE19946656A Withdrawn DE19946656A1 (en) | 1999-02-17 | 1999-09-29 | Production of biologically activated magnetic particles, useful for detection and quantification of e.g. bacteria, by attachment of specific antibody |
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DE19939208A Expired - Fee Related DE19939208C2 (en) | 1999-02-17 | 1999-08-18 | Process for displaying biologically activated inductivity-changing particles for their detection and counting and device therefor |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000049407A2 (en) * | 1999-02-17 | 2000-08-24 | Kilian Hennes | Method for representing biologically activated inductance-altering particles and device for carrying out the method |
DE10129815A1 (en) * | 2001-06-24 | 2003-01-09 | Profos Ag | Process for the purification of bacterial cells and cell components |
EP2313755A1 (en) * | 2008-07-31 | 2011-04-27 | EADS Deutschland GmbH | Device and method for the automatic detection of biological particles |
WO2015028569A1 (en) * | 2013-08-30 | 2015-03-05 | Mrb | Method and apparatus for analysing a sample volume comprising magnetic particles |
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AU2001293864A1 (en) * | 2000-10-04 | 2002-04-15 | Evotec Technologies Gmbh | Method and device for examining biological and/or chemical samples by means of giant magneto-impedance (gmi) |
DE10111520B4 (en) * | 2001-03-09 | 2004-01-15 | Chemagen Biopolymer-Technologie Aktiengesellschaft | Process for the purification of biomolecules using magnetic particles |
AT501194A1 (en) * | 2004-12-30 | 2006-07-15 | Thomas Dr Schlederer | METHOD FOR ISOLATING CELLS AND VIRUSES |
CN108169480B (en) * | 2018-02-07 | 2024-03-08 | 上海澜澈生物科技有限公司 | Method, system and chip for detecting molecular number of biomarker |
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SU907484A1 (en) * | 1980-06-30 | 1982-02-23 | Рижский Краснознаменный Институт Инженеров Гражданской Авиации Им.Ленинского Комсомола | Device for checking ferromagnetic particle content in liquid |
US4913883A (en) * | 1987-07-20 | 1990-04-03 | Hitachi, Ltd. | Particle agglutination immunoassay apparatus |
DE68919565T2 (en) * | 1988-07-20 | 1995-06-29 | Olympus Optical Co | Immunoassay method using magnetic marker particles. |
US5385707A (en) * | 1988-12-28 | 1995-01-31 | Stefan Miltenyi | Metal matrices for use in high gradient magnetic separation of biological materials and method for coating the same |
WO1996005326A1 (en) * | 1994-08-17 | 1996-02-22 | Fox John S | Method and apparatus for magnetically detecting proteins and nucleic acids |
FR2732116B1 (en) * | 1995-03-21 | 1997-05-09 | Bio Merieux | METHOD AND DEVICE FOR THE QUALITATIVE AND / OR QUANTITATIVE DETERMINATION OF AN ANALYTE, IN PARTICULAR OF A BACTERIA, IN A SAMPLE, BY MAGNETIC WAY |
-
1999
- 1999-02-17 DE DE19906352A patent/DE19906352A1/en not_active Withdrawn
- 1999-08-18 DE DE19939208A patent/DE19939208C2/en not_active Expired - Fee Related
- 1999-09-29 DE DE19946656A patent/DE19946656A1/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000049407A2 (en) * | 1999-02-17 | 2000-08-24 | Kilian Hennes | Method for representing biologically activated inductance-altering particles and device for carrying out the method |
WO2000049407A3 (en) * | 1999-02-17 | 2002-02-07 | Kilian Hennes | Method for representing biologically activated inductance-altering particles and device for carrying out the method |
DE10129815A1 (en) * | 2001-06-24 | 2003-01-09 | Profos Ag | Process for the purification of bacterial cells and cell components |
US7579142B2 (en) | 2001-06-24 | 2009-08-25 | Profos Ag | Methods for purification of bacterial cells and components |
US8932580B2 (en) | 2001-06-24 | 2015-01-13 | Hyglos Invest Gmbh | Methods for purification of bacterial cells and cell components |
EP2313755A1 (en) * | 2008-07-31 | 2011-04-27 | EADS Deutschland GmbH | Device and method for the automatic detection of biological particles |
WO2015028569A1 (en) * | 2013-08-30 | 2015-03-05 | Mrb | Method and apparatus for analysing a sample volume comprising magnetic particles |
US11221380B2 (en) | 2013-08-30 | 2022-01-11 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Method and apparatus for analyzing a sample volume comprising magnetic particles |
Also Published As
Publication number | Publication date |
---|---|
DE19906352A1 (en) | 1999-07-22 |
DE19939208A1 (en) | 2000-09-07 |
DE19939208C2 (en) | 2001-05-17 |
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