Optical density definition

Optical density or "OD" means a logarithmic expression of the optical attenuation afforded by a material.
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Optical density. (OD) means a logarithmic expression of the optical attenuation afforded by a material. (incident power)
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Examples of Optical density in a sentence

  • Optical density at 450 nm is read using an ELISA microtiter plate reader.

  • All reagents must be mixed without foaming.• Once the test has been started, all steps should be completed without interruption.• Use new disposal plastic pipette tips for each standard, control or sample in order to avoid cross contamination.• Optical density is a function of the incubation time and temperature.

  • Optical density values are means ± SE and expressed in arbitrary units.

  • Optical density (OD) was measured three times at 595nm, and the protein16 content was calculated according to a standard curve.17 2.2.4. Acetylcholinesterase (TChE) test 18 The TChE checker board method was followed the instructions of enzyme activity19 test kit produced by Nanjing Jiancheng Bioengineering Institute.

  • All reagents must be mixed without foaming. Once the test has been started, all steps should be completed without interruption. Use new disposal plastic pipette tips for each standard, control or sample in order to avoid cross contamination. Optical density is a function of the incubation time and temperature.

  • All reagents must be mixed without foaming.− Once the test has been started, all steps should be completed without interruption.− Use new disposal plastic pipette tips for each standard, control or sample in order to avoid cross contamination.− Optical density is a function of the incubation time and temperature.

  • Optical density quantification of S6K and 4E-BP phosphorylation is expressed as the ratio of the phosphorylated protein to the total protein.

  • For validation of the assay, the following criteria must be met:• Optical density values:OD R4a ≥ 0.200 OD R4b ≥ 0.400• Optical density ratios:OD R4a / OD R3 ≥ 5.00 OD R4b / OD R4a ≥ 1.50 OD R4c / OD R4b ≥ 1.20If those quality control criteria are not met, the test run should be repeated.

  • Candidate hybridomas suitable for mon- oclonal antibody production were selected on the basis of good positive results (Optical density > 1.0 at 405 nm) and minimal cross-reactivity with the other selected bacteria.

  • Optical density of the aging human ocular media in the visible and the UV.

Related to Optical density

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