Thermodynamic Characterization of High-Temperature Superconductors in the Yttrium-Barium-Copper-Oxygen System. The Y123 Solid Solution

Julho de 2009

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The aim of this report is to inform the chemical community about a selfconsistent thermodynamic data set for the YBa2Cu3O6+z (1 ≥ z ≥ 0) solid solution, that is well known as the Y123 phase and possesses superconducting properties at z~1 and low temperatures. About 3300 experimental points obtained in 240 miscellaneous experiments published in [...]


Glossary of Terms Related to Solubility

Setembro de 2008

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Phenomena related to the solubility of solids, liquids, and gases with one another are of interest to scientists and technologists in an array of disciplines. The diversity of backgrounds of individuals concerned with solubility creates a potential for confusion and miscommunication and heightens the need for an authoritative glossary of terms related to solubility. This [...]


Impact of Scientific Developments on the Chemical Weapons Convention

Agosto de 2008

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This report summarizes the findings and recommendations of an international workshop that was organized jointly by IUPAC and the Organisation for the Prohibition of Chemical Weapons (OPCW), and held in Zagreb, Croatia, from 22 to 25 April 2007. It was held to assist with preparation for the Second Review Conference of the Chemical Weapons Convention [...]


Chemists and “The Public”: IUPAC’s Role in Achieving Mutual Understanding

Agosto de 2008

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This report informs IUPAC’s efforts to enhance the public understanding of and appreciation for chemistry by evaluating IUPAC’s mandate, strengths, and weaknesses, and providing insights from a substantial review of the relevant science communication literature. It summarizes the recommendations of an IUPAC project whose overall goal is to provide a framework that will bring the [...]


Structure-Based Nomenclature for Cyclic Organic Macromolecules

Julho de 2008

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A structure-based nomenclature system for monocyclic and polycyclic organic macromolecules is presented. Single-strand mono- and polycyclic macromolecules as well as spiro macrocyclic compounds are covered. However, rotaxanes and catenanes, which contain interlocked rings, and rings or ring systems formed by noncovalent bonds are excluded. Also, polypeptides and carbohydrate polymers are not included. The nomenclature of [...]


Transport of Pesticides via Macropores

Fevereiro de 2008

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This report provides an overview of the transport of solutes via macropores focusing on the practical relevance of the phenomenon. After a description of matrix flow and preferential flow in soil, information related to macropores, including their formation and measurement techniques, is briefly presented. Then, the influence of experimental conditions and of environmental and agricultural [...]


Further Conventions for NMR Shielding and Chemical Shifts

Janeiro de 2008

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IUPAC has published a number of recommendations regarding the reporting of nuclear magnetic resonance (NMR) data, especially chemical shifts. The most recent publication [Pure Appl. Chem. 73, 1795 (2001)] recommended that tetramethylsilane (TMS) serve as a universal reference for reporting the shifts of all nuclides, but it deferred recommendations for several aspects of this subject. [...]


Graphical Representation Standards for Chemical Structure Diagrams

Janeiro de 2008

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The purpose of a chemical structure diagram is to convey information — typically the identity of a molecule—to another human reader or as input to a computer program. Any form of communication, however, requires that all participants understand each other. Recommendations are provided for the display of two-dimensional chemical structure diagrams in ways that avoid [...]


Performance Evaluation Criteria for Preparation and Measurement of Macroand Microfabricated Ion-Selective Electrodes

Janeiro de 2008

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Over the last 30 years, IUPAC published several documents with the goal of achieving standardized nomenclature and methodology for potentiometric ionselective electrodes (ISEs). The ISE vocabulary was formulated, measurement protocols were suggested, and the selectivity coefficients were compiled. However, in light of new discoveries and experimental possibilities in the field of ISEs, some of the [...]


Explanatory Dictionary of Key Terms in Toxicology

Julho de 2007

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The objective of the “Explanatory Dictionary of Key Terms in Toxicology” is to give full explanations of the meaning of toxicological terms chosen for their importance and complexity from the point of merging chemistry and toxicology. This requires a full description of the underlying concepts, going beyond a normal dictionary definition. Often linguistic barriers lead [...]






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