Motive unit

high-resolution terminology - matching measurements at high-resolution

Motive unit

Description

The motive unit [MU] is the variable SI unit in which the motive entity (transformant) of a transformation is expressed, which depends on the energy transformation under study and on the chosen format. Fundamental MU for electrochemical transformations are:

• MU = x, for the particle or molecular format, N
• MU = mol, for the chemical or molar format, n
• MU = C, for the electrical format, e;

For the protonmotive force the motive entity is the proton with charge number z=1. The protonmotive force is expressed in the electrical or molar format with MU J/C=V or J/mol=Jol, respectively. The conjugated flows, I, are expressed in corresponding electrical or molar formats, C/s = A or mol/s, respectively.

The charge number, z, has to be considered in the conversion of motive units (compare Table below), if a change not only of units but a transition between the entity elementary charge and an entity with charge number different from unity is involved (e.g., O₂ with z=4 in a redox reaction). The ratio of elementary charges per reacting O₂ molecule (z_O2=4) is multiplied by the elementary charge (e, coulombs per proton), which yields coulombs per O₂ [C∙x^-1]. This in turn is multiplied with the Avogadro constant, N_A (O₂ molecules per mole O₂ [x∙mol^-1]), thus obtaining for zeN_A the ratio of elementary charges [C] per amount of O₂ [mol^-1]. The conversion factor for O₂ is 385.94132 C∙mmol^-1.

Abbreviation: MU

Communicated by Gnaiger E (2018-10-20) last update 2020-12-01

• 
• 

  Converstion between different motive formats and corresponding motive units

Bioblast links: Normalization - >>>>>>> - Click on [Expand] or [Collapse] - >>>>>>>

Rate

» Normalization of rate

» Flow

» Oxygen flow

» Flux

» Oxygen flux

» Flux control ratio

» Coupling-control ratio

» Pathway control ratio

» Flux control efficiency

Quantities for normalization

» Count in contrast to Number

» Mitochondrial marker

» O2k-Protocols: mitochondrial and marker-enzymes

» Citrate synthase activity

General

» Extensive quantity

» Specific quantity

» Advancement

» Motive unit

» Iconic symbols

Related keyword lists

» Keywords: Concentration and pressure

Bioblast links: SI base units - >>>>>>> - Click on [Expand] or [Collapse] - >>>>>>>

Entity, count, and number, and SI base quantities / SI base units

Quantity name	Symbol	Unit name	Symbol	Comment
elementary	UX	elementary unit	[x]	UX, UB; [x] not in SI
count	NX	elementary unit	[x]	NX, NB; [x] not in SI
number	N	-	dimensionless	= NX·UX-1
amount of substance	nB	mole	[mol]	nX, nB
electric current	I	ampere	[A]	A = C·s-1
time	t	second	[s]
length	l	meter	[m]	SI: metre
mass	m	kilogram	[kg]
thermodynamic temperature	T	kelvin	[K]
luminous intensity	IV	candela	[cd]

Fundamental relationships

» Avogadro constant N_A

» Boltzmann constant k

» elementary charge e

» Faraday constant F

» gas constant R

» electrochemical constant f

SI and related concepts

» International System of Units

» elementary unit x

» SI prefixes

» International Union of Pure and Applied Chemistry, IUPAC

» entity

» quantity

» dimension

» format

» motive unit

» iconic symbols

MitoPedia concepts: Ergodynamics