Cohen 2008 IUPAC Green Book

Cohen ER, Cvitas T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor HL (2008) Quantities, Units and Symbols in Physical Chemistry. IUPAC Green Book 3rd Edition, 2nd Printing, IUPAC & RSC Publishing, Cambridge.

» Open Access

Cohen ER, Cvitas T, Frey JG, Holmstroem B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor HL (2008) IUPAC Green Book

Abstract: The purpose of this manual is to improve the exchange of scientific information among the readers in different disciplines and across different nations. As the volume of scientific literature expands, each discipline has a tendency to retreat into its own jargon. This book attempts to provide a readable compilation of widely used terms and symbols from many sources together with brief understandable definitions. IUPAC is the acronym for International Union of Pure and Applied Chemistry.

• Bioblast editor: Gnaiger E

Preprint

in: Anastrophe XX Entity X and elementary unit x of A X-mass Carol

* Preprint released 2020-08-11 » Canon II: Canonical reviewer's comments on: Bureau International des Poids et Mesures (2019) The International System of Units (SI) 9^th ed.

Number and count

Number and count

In section 2.9 STATISTICAL THERMODYNAMICS (p. 39), the first entry is 'number of entities' N (SI unit: 1), and the second entry is 'number density of entities, number concentration C = N/V (SI unit: m^-3).
In section 2.10 GENERAL CHEMISTRY (p. 42) again: 'number concentration, number density of entities' C_B = N_B/V (SI unit: m^-3; Notes 2, 12, 14).

Note (2): The definition applies to entities B which should always be indicated by a subscript or in parentheses, e.g. n_B or n(B).

Note (12): V is the volume of the mixture.

Note (14): The term number concentration and symbol C is preferred for mixtures.

Comment: Number of entities is not a number, but number of entities is a count. The IUPAC Green Book does not define nor use the term count, whereas the term count for a quantity is used by the SI without proper definition (Bureau International des Poids et Mesures 2019 The International System of Units (SI)). The way count is used in the SI suggestes the definition of count as the number of elementary entities. 'Number concentration' is a misleading term and should be replaced by the proper term 'count concentration'.

Charge of an electron — or per electron

Section 2.4 QUANTUM MECHANICS AND QUANTUM CHEMISTRY, Note (6): -e is the charge of an electron.

Comment: Elementary charge or proton charge e is the charge per elementary entity H⁺ with SI unit [C] but canonical SI unit [C·x^-1]. When the charge Q_el [C] of a number N_e [x] of electrons e is divided by the count N_e, then the particle charge or charge per elementary entity is obtained, -e = Q_el/N_e [C·x^-1].

Extension to terminology on nonequilibrium thermodynamics

Gnaiger E (1993) Nonequilibrium thermodynamics of energy transformations. Pure Appl Chem 65:1983-2002. - »Bioblast link«

Keywords—MitoPedia

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	U_X	elementary unit	[x]	U_X, U_B; [x] not in SI
count	N_X	elementary unit	[x]	N_X, N_B; [x] not in SI
number	N	-	dimensionless	= N_X·U_X^-1
amount of substance	n_B	mole	[mol]	n_X, n_B
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	I_V	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

Bioblast links: Concentration and pressure - >>>>>>> - Click on [Expand] or [Collapse] - >>>>>>>

Concentration

» Volume

» Activity

» Concentration

» Density

» Mole

» Molar mass

Pressure

» Barometric pressure

» Chemiosmotic pressure

» Gas pressure

» Osmotic pressure

» Oxygen pressure

» pascal

» Pressure

Solubility = concentration/pressure

» Solubility

» Solubility factor

» Oxygen solubility

General

» Boltzmann constant

» Energy

» Force

» Gas constant

» Work

Related keyword lists

» Keywords: Oxygen signal

» Keywords: Normalization

Cited by

Gnaiger E (2024) Addressing the ambiguity crisis in bioenergetics and thermodynamics. MitoFit Preprints 2024.3. https://doi.org/10.26124/mitofit:2024-0003

Komlódi T, Cardoso LHD, Doerrier C, Moore AL, Rich PR, Gnaiger E (2021) Coupling and pathway control of coenzyme Q redox state and respiration in isolated mitochondria. Bioenerg Commun 2021.3. https://doi.org/10.26124/bec:2021-0003

Gnaiger E (2020) Mitochondrial pathways and respiratory control. An introduction to OXPHOS analysis. 5^th ed. Bioenerg Commun 2020.2. https://doi.org/10.26124/bec:2020-0002

Gnaiger E (2020) Canonical reviewer's comments on: Bureau International des Poids et Mesures (2019) The International System of Units (SI) 9th ed. MitoFit Preprint Arch 2020.4 doi:10.26124/mitofit:200004.

Gnaiger E et al ― MitoEAGLE Task Group (2020) Mitochondrial physiology. Bioenerg Commun 2020.1. doi:10.26124/bec:2020-0001.v1.

Labels:

Amount of substance, Avogadro constant, Charge number, Concentration, Count, Density, International System of Units, IUPAC, Oxygen solubility, MitoFit 2020.4, BEC 2020.1, BEC 2020.2, X-mass Carol, Molar mass, MitoFit 2021 CoQ, Gnaiger 2024 MitoFit