British Pharmacopoeia Volume IV
Appendices

Appendix XXIV Abbreviations

ATCC*	American Type Culture Collection.
BPCRS	British Pharmacopoeia Chemical Reference Substance (see Appendix I E).
BRP	Biological reference preparation (see Appendix I E).
BS	British Standard.
CCID₅₀	Cell culture infective dose (the dose of the micro-organism that infects 50% of the cell cultures inoculated).
CIP*	Collection de Bactéries de l'Institut Pasteur.
CRS	Chemical reference substance (see Appendix I E).
DNA	Deoxyribonucleic acid.
EID₅₀	Egg embryos infective dose (the dose of the micro-organism that infects 50% of the embryonated eggs inoculated).
EPBRP	European Pharmacopoeia Biological Reference Preparation (see Appendix I E).
EPCRS	European Pharmacopoeia Chemical Reference Substance (see Appendix I E).
FIP	International Pharmaceutical Federation.
g	Acceleration due to gravity.
HIV	Human immunodeficiency virus
ID₅₀	Infective dose 50 (the dose of the micro-organism that infects 50% of the animals inoculated).
IMI*	Commonwealth Mycological Institute.
IP*	Collection Nationale de Cultures de Microorganismes (CNCM).
ISO	International Organization for Standardization.
IU	International Unit
IUPAC	International Union of Pure and Applied Chemistry.
LD₅₀	Lethal dose 50 (the dose of the preparation or organism that kills 50% of the animals inoculated).
MID	Minimum infective dose.
MLD	Minimum lethal dose.
MRI	Magnetic resonance imaging.
NCIMB*	National Collection of Industrial and Marine Bacteria.
NCPF*	National Collection of Pathogenic Fungi.
NCTC*	National Collection of Type Cultures.
NCYC*	National Collection of Yeast Cultures.
PD₅₀	Protective dose 50 (the dose of the preparation that protects 50% of the animals inoculated).
ppm	Parts per million by weight.
SI	International System of Units.
SN₅₀	Serum neutralising dose 50 (the amount of serum that will protect 50% of the cultures against the specified amount of virus).
SSI	Statens Serum Institut (Copenhagen).
THM	Traditional Herbal Medicine.
THMP	Traditional Herbal Medicinal Product.
VS	Volumetric solution (see Appendix I B).
µkat	Microkatal: the enzyme activity that, under defined conditions, produces 1 micromole of the reaction product per second or consumes one micromole of the reaction substrate per second.

*Strains of the micro-organisms referred to in the Pharmacopoeia may be obtained from:

ATCC	American Type Culture Collection, 10801 University Boulevard, Manassas, Virginia 20110-2209, USA
CIP	Collection de Bactéries de l'Institut Pasteur, BP 52, 25 Rue du Dr-Roux, F-75724, Paris Cedex 15, France.
IMI	International Mycological Institute, Bakeham Lane, Surrey TW20 9TY, England
IP	Service de la Collection Nationale de Culture de Microorganismes (CNCM), Institut Pasteur, 25 Rue de Dr Roux, F-75724, Paris Cedex 15 France
NCIMB	National Collection of Industrial and Marine Bacteria Ltd, 23 St Machar Drive, Aberdeen, AB24 3RY, Scotland.
NCPF	National Collection of Pathogenic Fungi, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, England.
NCTC	National Collection of Type Cultures, Central Public Health Laboratory, Colindale Avenue, London NW9 5HT, England.
NCYC	National Collection of Yeast Cultures, AFRC Food Research Institute, Colney Lane, Norwich NR4 7UA, England.