Provisional Recommendations
Provisional Recommendations
www.iupac.org/reports/provisional
Convention on the Use of Units for Time in Earth and Planetary Sciences
The units of time (both absolute time and duration) most practical to use in Earth and Planetary Sciences are multiples of the year, or annus (a). Its proposed definition in terms of the fundamental SI unit for time, the second (s), for the epoch 2000.0 is 1 a = 3.1556925445 x 107 s. Adoption of this definition, and abandonment of the use of distinct units for time differences, will bring the Earth and Planetary Sciences into compliance with the SI standard regarding units of time.
Comments by 30 June 2009
Dr. Igor Villa
Institut für Geologie
Universität Bern
CH-3012 Bern, Switzerland
E-mail: igor@geo.unibe.ch
Page last modified 24 April 2009.
Copyright © 2003-2009 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
Provisional Recommendations
www.iupac.org/reports/provisional
Explanatory Dictionary of Key Terms in Toxicology, Part II
The objective of the Explanatory Dictionary of Key Terms in Toxicology is to give full explanations of the meaning and usage of toxicological terms chosen for their importance and complexity with regard to the merging of chemistry into toxicology. This requires a full description of the underlying concepts, going beyond a normal dictionary definition. Often linguistic barriers lead to problems in obtaining a common understanding of terminology at an international level and between disciplines. The explanatory comments should help to break down such barriers.
This dictionary is a follow up and continuation of part I published in 2007 (Pure Appl. Chem., 2007, Vol. 79, No. 9, pp. 1583-1633; doi:10.1351/pac200779091583). It consists of a collection of terms chosen from the IUPAC Glossary of Terms Used in Toxicology. These terms are organized under 19 main headings.
Comments by 31 August 2009
Monica Nordberg
Institute of Environmental Medicine
Karolinska Institutet
SE-171 77 Stockholm, Sweden
E-mail: monica.nordberg@ki.se
Page last modified 24 April 2009.
Copyright © 2003-2009 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
© 2014 by Walter de Gruyter GmbH & Co.
Articles in the same Issue
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- From the Editor
- Contents
- Moving Ahead with the International Year of Chemistry
- What Is “Materials Chemistry?”
- Beyond the Book
- Scientific Method: Can It Help Promote the Public Appreciation of Science?
- IUPAC President Publicizes the International Year of Chemistry
- L’Oréal-UNESCO Awards Bestowed Upon Five Exceptional Women Scientists
- Javier Garcia Martinez Named a Young Global Leader
- Deliang Chen Takes the Helm at ICSU
- Postgraduate Course in Polymer Science
- Toward a Comprehensive Definition of Oxidation State
- IUPAC International Chemical Identifier–InChI Update
- Humic-Metal Binding Constants Database
- Provisional Recommendations
- Immunological Effects of Mercury (IUPAC Technical Report)
- Teaching High-Temperature Materials Chemistry at University (IUPAC Technical Report)
- Guidelines for Rheological Characterization of Polyamide Melts (IUPAC Technical Report)
- Dispersity in Polymer Science (IUPAC Recommendations 2009)
- Countercurrent Chromatography in Analytical Chemistry (IUPAC Technical Report)
- A Global Science Gateway
- Interactions of Soil Minerals with Organic Components and Microorganisms
- Biotechnology for the Sustainability of Human Society
- From Molecular Understanding to Innovative Applications of Humic Materials
- D.I. Mendeleev and the Problems of Sustainable Development
- Mendeleev and Natural Resources
- Challenges in Organic and Bioorganic Chemistry
- Biological Surfaces and Interfaces
- Heteroatom Chemistry
- Philosophy of Chemistry
- Advanced Materials
- Thermodynamics
- Crop Protection Chemistry in Latin America
- Mark Your Calendar
Articles in the same Issue
- Masthead
- From the Editor
- Contents
- Moving Ahead with the International Year of Chemistry
- What Is “Materials Chemistry?”
- Beyond the Book
- Scientific Method: Can It Help Promote the Public Appreciation of Science?
- IUPAC President Publicizes the International Year of Chemistry
- L’Oréal-UNESCO Awards Bestowed Upon Five Exceptional Women Scientists
- Javier Garcia Martinez Named a Young Global Leader
- Deliang Chen Takes the Helm at ICSU
- Postgraduate Course in Polymer Science
- Toward a Comprehensive Definition of Oxidation State
- IUPAC International Chemical Identifier–InChI Update
- Humic-Metal Binding Constants Database
- Provisional Recommendations
- Immunological Effects of Mercury (IUPAC Technical Report)
- Teaching High-Temperature Materials Chemistry at University (IUPAC Technical Report)
- Guidelines for Rheological Characterization of Polyamide Melts (IUPAC Technical Report)
- Dispersity in Polymer Science (IUPAC Recommendations 2009)
- Countercurrent Chromatography in Analytical Chemistry (IUPAC Technical Report)
- A Global Science Gateway
- Interactions of Soil Minerals with Organic Components and Microorganisms
- Biotechnology for the Sustainability of Human Society
- From Molecular Understanding to Innovative Applications of Humic Materials
- D.I. Mendeleev and the Problems of Sustainable Development
- Mendeleev and Natural Resources
- Challenges in Organic and Bioorganic Chemistry
- Biological Surfaces and Interfaces
- Heteroatom Chemistry
- Philosophy of Chemistry
- Advanced Materials
- Thermodynamics
- Crop Protection Chemistry in Latin America
- Mark Your Calendar
