Parameter: optical_density

Short Description: optical_density

Short Name: optical_density

Official Name: optical_density

Units: usually unitless

No Data Value: nd

Description

Measurement of the degree to which light at specific wavelengths pass through a medium. The more dense the medium, the less light passes through. Optical density is usually measured with a spectrophotometer set at a specific wavelength for a specific medium or solution. Optical density can be used to measure the concentration of bacteria or phytoplankton.

Parameter Occurences in Datasets (14)

Dataset	PI-Supplied Description	PI-Supplied Name
Results from laboratory experiments testing autoinduction in marine diatoms, Thalassiosira pseudonana and Phaeodactylum tricornutum (PhytoplanktonQS project)	Average of the three replicate sample measurements: first, prime and doubleprime.	avg_OD_triple
Results from laboratory experiments testing autoinduction in marine diatoms, Thalassiosira pseudonana and Phaeodactylum tricornutum (PhytoplanktonQS project)	Optical Density (OD) of the sample at 750 nm. OD1, OD2 and OD3 are replicate measurements.	OD
Results from laboratory experiments testing autoinduction in marine diatoms, Thalassiosira pseudonana and Phaeodactylum tricornutum (PhytoplanktonQS project)	Corrected OD average of the sample: OD sample minus OD blank	OD_avg_corr
Results from laboratory experiments testing autoinduction in marine diatoms, Thalassiosira pseudonana and Phaeodactylum tricornutum (PhytoplanktonQS project)	Standard deviation of the triples measurements.	OD_std_dev
Siderophore concentrations found in supernatants of Azotobacter vinelandii str. OP, Azotobacter chroococcum str. B3, and Azotobacter chroococcum str. NCIMB 8003 from laboratory experiments in 2015	Summed concentration of various azotobactin type siderophores described in Baars, Oliver, et al. (2006).	azotobactins
Population changes in Halobacteriovorax cultured with protist & prey	Optical Density	Optical_Density
High throughput growth screening of the marine bacterium Ruegeria pomeroyi DSS-3 knockout mutants on 70 environmentally relevant marine substrates done in 2021.	optical density read at 600 nm	OD
Siderophore concentrations found in supernatants of Rhodopseudomonas palustris str. CGA009 grown under different aerobic and anaerobic conditions from laboratory experiments in 2016	Optical density of the culture measured at 660 nm.	OD660
Optical density and cell counts from flow cytometry of Ruegeria pomeroyi laboratory cultures	Optical Density (OD)	Optical_Density
Series 1A: Two-stressor effects on Tp-1335: Experiments to investigate the combined effect of light and temperature changes on the growth rate of Thalassiosira pseudonana CCMP	optical density at 680 nm; averaged from 7 measurements taken automatically in 10 minute intervals.	OD680_avg
Series 1A: Two-stressor effects on Tp-1335: Experiments to investigate the combined effect of light and temperature changes on the growth rate of Thalassiosira pseudonana CCMP	optical density at 720 nm; averaged from 7 measurements taken automatically in 10 minute intervals.	OD720_avg
Series 1B: Four follow-up experiments on the combined effect of light and temperature changes on the growth rate (mu) of Thalassiosira pseudonana CCMP 1335 conducted to supplement series 1A experiments	optical density at 680 nm; averaged from 7 measurements taken automatically in 10 minute intervals	avg_OD680
Series 1B: Four follow-up experiments on the combined effect of light and temperature changes on the growth rate (mu) of Thalassiosira pseudonana CCMP 1335 conducted to supplement series 1A experiments	optical density at 720 nm; averaged from 7 measurements taken automatically in 10 minute intervals	avg_OD720
Amphi-enterobactins and related siderophore concentrations found in Vibrio harveyi supernatants and pellets from laboratory experiments in 2017	Optical density of the culture measured at 500 nm	OD500