Geiger Counter Detection
Geiger Counter Detection - Related Videos
09:33
Determining Cell Number During Cell Culture using the Scepter Cell Counter
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Cited by 56 •
2010
The Scepter Cell Counter is a handheld automated device that can be used to count cells, monitor cell diameter and volume, and be used to check the health and quality of cellular populations from one culture to the next.
13:16
Determination of Mammalian Cell Counts, Cell Size and Cell Health Using the Moxi Z Mini Automated Cell Counter
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Cited by 18 •
2012
The Moxi Z miniature automated cell counter is a novel instrument that combines the Coulter Principle with patented thin-film sensor technology and a proprietary software algorithm to perform sizing and counting of a broad size range of particles as well as to determine the overall health of monodisperse mammalian cell cultures. This protocol describes the use of this instrument for counting and assessing the health of cell cultures.
09:10
Combination of Adhesive-tape-based Sampling and Fluorescence in situ Hybridization for Rapid Detection of Salmonella on Fresh Produce
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Cited by 17 •
2010
This protocol describes a simple adhesive-tape-based approach for sampling of tomato and other fresh produce surfaces, followed by rapid whole cell detection of Salmonella using fluorescence in situ hybridization (FISH).
07:31
Agarose-Based Model Ecosystem for Cultivating Methanotrophs in a Methane-Oxygen Counter Gradient
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2024
A protocol is described for preparing a simple model ecosystem that recreates the methane-oxygen counter gradient found in the natural habitat of aerobic methane-oxidizing bacteria, enabling the study of their physiology in a spatially resolved context. Modifications to common biochemical assays for use with the agarose-based model ecosystem are also described.
04:33
Gel Electrophoresis and Northern Blotting to Detect tRNA Charging Levels in E. coli
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2025
Source: Stenum, T. S., et al. Quantification of the Abundance and Charging Levels of Transfer RNAs in Escherichia coli. J. Vis. Exp. (2017)This video demonstrates the use of gel electrophoresis and northern blotting to detect and compare the charging levels of transfer RNAs in E. coli by separating aminoacylated and deacylated forms.
FAQs
Radiation entering the Geiger-Müller tube ionizes the low-pressure gas between its charged electrodes. The resulting charged particles initiate an electrical avalanche, amplifying the original event into a pulse that the instrument can record. This amplification allows each detected interaction to contribute to a count, making radiation events measurable even when they are not directly visible.
Counts over time provide an indication of radiation presence and relative intensity. A higher count indicates more detected events during the measurement period, while changes in counts can help reveal differences between biological samples, laboratory conditions, or monitoring situations. These readings support comparison and tracking, but they do not by themselves identify the radioactive material responsible.
The instrument records electrical pulses generated by detected radiation, but the count does not generally include detailed information about radiation energy. Because isotope identification depends on information beyond simple event totals, a Geiger counter cannot usually determine which isotope produced the reading. Its principal value is detecting radiation and comparing relative levels rather than characterizing radionuclides.
Measurements can be used to assess whether radioactive contamination is present during biological research and laboratory work. Researchers apply the method when monitoring environments or materials associated with radioisotope handling, using counts over time to indicate radiation presence and relative intensity. This supports contamination assessment without requiring the instrument to identify the specific isotope involved.
During radioisotope handling, the method provides a way to monitor radiation in laboratory settings and detect possible contamination associated with the work. Its measurements offer a practical indication of radiation presence and relative intensity, helping researchers track conditions while working with radioactive materials. Interpretation remains limited because the readings do not generally reveal isotope identity or detailed radiation energy.
Researchers can use counts over time to track radioactive tracers during biological experiments. The resulting measurements indicate where radiation is detected and provide relative intensity information associated with the tracer-related work. This makes the method useful for following radioactive signals in a biological research context, while recognizing that the readings alone do not describe the tracer's isotope or radiation energy in detail.