Absorbance

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Absorbance)

synonyms: absorbance, A

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Absorbance

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Absorbance)

synonyms: absorbance, A

In chemistry, absorbance or decadic absorbance is the common logarithm of the ratio of incident to transmitted radiant power through a material, and spectral absorbance or spectral decadic absorbance is the common logarithm of the ratio of incident to transmitted spectral radiant power through a material.

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defined in:

Activity Content

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ActivityContent)

synonyms: activity content, A/M

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defined in:

Compressibility Correction Factor

(http://purl.allotrope.org/ontology/qudt-ext/quantity#CompressibilityCorrectionFactor)

synonyms: compressibility correction factor

A correction factor used in chromatography for the compressibility of the mobile phase.

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defined in:

Count

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Count)

synonyms: count

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defined in:

Count

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Count)

synonyms: count

Count is the number of countable, specified objects.

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defined in:

Electrical Conductivity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalResistivity)

synonyms: electrical conductivity, σ

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defined in:

Electrical Conductivity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalResistivity)

synonyms: electrical conductivity, σ

Electrical conductivity or specific conductance is the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current.

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defined in:

Electrical Resistivity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalConductivity)

synonyms: electrical resistivity, ρ

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defined in:

Electrical Resistivity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalConductivity)

synonyms: electrical resistivity, ρ

Electrical conductivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.

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defined in:

Enzymatic Activity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#EnzymaticActivity)

synonyms: enzymatic activity

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defined in:

Enzymatic Activity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#EnzymaticActivity)

synonyms: enzymatic activity

Enzyme activity is a measure of the quantity of active enzyme present and is thus dependent on conditions, which should be specified.

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defined in:

Gain

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Gain)

synonyms: gain, gain per voltage

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defined in:

Gain per Voltage

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Gain)

synonyms: gain, gain per voltage

Gain is the ratio of output signal strength to input voltage. [Allotrope]

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defined in:

Infectivity

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Infectivity)

synonyms: infectivity

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defined in:

Number Concentration

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberConcentration)

synonyms: number concentration, C

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defined in:

Number Density deprecated

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberDensity)

synonyms: n

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defined in:

Number Density

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberDensity)

synonyms: n

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defined in:

Number Per Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberPerTime)

synonyms: number per time, n/t

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defined in:

Number per Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberPerTime)

synonyms: number per time, n/t

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defined in:

Number per Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberPerTime)

synonyms: number per time, n/t

Number per time is the number of specified objects per unit time. [Allotrope]

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defined in:

Number times Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberTimesTime)

synonyms: number times time, n*t, n.t

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defined in:

Number times Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberTimesTime)

synonyms: number times time, n*t, n.t

Number times time is the number of specified objects times unit time. [Allotrope]

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defined in:

Quantity per Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityPerTime)

synonyms: quantity per time, x/t

Creative Commons Attribution 4.0 International Public License

defined in:

http://purl.allotrope.org/voc/qudt/REC/2025/03/qudt-ext

Quantity times Time deprecated

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesTimeUnit)

synonyms: x*t

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defined in:

http://purl.allotrope.org/voc/qudt/OLD/2020/03/qudt-ext

Quantity times Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesTimeUnit)

synonyms: x*t

Creative Commons Attribution 4.0 International Public License

defined in:

http://purl.allotrope.org/voc/qudt/REC/2019/12/qudt-ext

Quantity times Time

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesTime)

synonyms: quantity times time, x*t, x.t

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defined in:

Quantity times Volume

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesVolume)

synonyms: quantity times volume, x*V

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defined in:

Refractive Index

(http://purl.allotrope.org/ontology/qudt-ext/quantity#RefractiveIndex)

synonyms: refractive index, n

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defined in:

Refractive Index

(http://purl.allotrope.org/ontology/qudt-ext/quantity#RefractiveIndex)

synonyms: refractive index, n

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.

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defined in:

Refractive Index Unit

(http://purl.allotrope.org/ontology/qudt-ext/quantity#RefractiveIndexUnit)

synonyms: RIU

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defined in:

http://purl.allotrope.org/voc/qudt/REC/2018/04/qudt-ext

Specific Surface Area

(http://purl.allotrope.org/ontology/qudt-ext/quantity#SpecificSurfaceArea)

synonyms: specific surface area

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defined in:

Specific Surface Area

(http://purl.allotrope.org/ontology/qudt-ext/quantity#SpecificSurfaceArea)

synonyms: specific surface area

Specific surface area (SSA) is a property of solids defined as the total surface area of a material per unit of mass.

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defined in:

absorbance (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Absorbance)

synonyms: absorbance, A

In chemistry, absorbance or decadic absorbance is the common logarithm of the ratio of incident to transmitted radiant power through a material, and spectral absorbance or spectral decadic absorbance is the common logarithm of the ratio of incident to transmitted spectral radiant power through a material.

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defined in:

activity content (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ActivityContent)

synonyms: activity content, A/M

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defined in:

compressibility correction factor (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#CompressibilityCorrectionFactor)

synonyms: compressibility correction factor

A correction factor used in chromatography for the compressibility of the mobile phase.

Creative Commons Attribution 4.0 International Public License

defined in:

count (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Count)

synonyms: count

Count is the number of countable, specified objects.

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defined in:

electrical conductivity (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalResistivity)

synonyms: electrical conductivity, σ

Electrical conductivity or specific conductance is the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current.

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defined in:

electrical resistivity (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#ElectricalConductivity)

synonyms: electrical resistivity, ρ

Electrical conductivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.

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defined in:

enzymatic activity (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#EnzymaticActivity)

synonyms: enzymatic activity

Enzyme activity is a measure of the quantity of active enzyme present and is thus dependent on conditions, which should be specified.

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defined in:

gain per voltage (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Gain)

synonyms: gain, gain per voltage

Gain is the ratio of output signal strength to input voltage. [Allotrope]

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defined in:

infectivity (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#Infectivity)

synonyms: infectivity

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defined in:

number concentration (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberConcentration)

synonyms: number concentration, C

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defined in:

number density deprecated

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberDensity)

synonyms: n

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defined in:

number density (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberDensity)

synonyms: n

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defined in:

number per time (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberPerTime)

synonyms: number per time, n/t

Number per time is the number of specified objects per unit time. [Allotrope]

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defined in:

number times time (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#NumberTimesTime)

synonyms: number times time, n*t, n.t

Number times time is the number of specified objects times unit time. [Allotrope]

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defined in:

quantity per time (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityPerTime)

synonyms: quantity per time, x/t

Creative Commons Attribution 4.0 International Public License

defined in:

http://purl.allotrope.org/voc/qudt/REC/2025/03/qudt-ext

quantity times time (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesTime)

synonyms: quantity times time, x*t, x.t

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defined in:

quantity times volume (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#QuantityTimesVolume)

synonyms: quantity times volume, x*V

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defined in:

refractive index (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#RefractiveIndex)

synonyms: refractive index, n

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.

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defined in:

specific surface area (quantity kind)

(http://purl.allotrope.org/ontology/qudt-ext/quantity#SpecificSurfaceArea)

synonyms: specific surface area

Specific surface area (SSA) is a property of solids defined as the total surface area of a material per unit of mass.

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defined in: