Impact factors

Impact Factor 2008 5.270 Section Chanistry, Multidisciphnary Rank 14 of 125... 

Impact Factor 2010 2.067 Section Chemistry, Multidisciphnary Rank44of 144... 

To get an impression of which journals are the most read and cited, the Institute of Scientific Information (Philadelphia, PA, USA) provides two interesting indicators [Journal Citation Reports, Science Edition]. The impact factor for a given journal is the number of citations in that year to articles published by the journal in the two previous years. Thus, if each article published in, for example, either 1998 or 1999 is cited exactly once in 2000, the journal will have an impact factor of 1 in that year. Authors use impact factors to decide where to submit their publications. For specialized journals, e.g. those focusing on catalysis, impact factors of 3 and higher are considered high. Review journals usually have higher impact factors, whereas letter journals usually score lower. 

Table 1.5. Impact factors and citation half-lives for selected journals. 

The quantities RME and (Sheldon environmental impact factor or -factor based on mass) ° are related by a simple expression given by equation (4.4) which allows easy calculation of either parameter once one of them is known. It is often simpler to determine Em first and then to use equation (4.4) to calculate RME. The derivation of equation (4.4) is linked to that of equation (4.1) and is also given in Appendix B. 

A similar expression for AE in terms of Emw> environmental impact factor based on molecular weight, is given by... 

Table 4.2 Summary of expressions for mass of waste produced, w, and environmental impact factor based on mass, Em, for the three options dealing with byproduct Q. 

The goals of most LCA have been limited to determination of the impact of the fluid milk process on GHG emissions and energy due to the availability of relevant data and guidelines from the IPCC and other government agencies. Data for conducting LCA of the other impact factors such as water use, aquatic toxicity, human health, and land use are scarce, but new initiatives to reduce the impact of dairy production in... 

Mackay CR. Chemokines immunology s high impact factors. Nat Immunol 2001 2(2) 95-101. 

The data situation for additives in LCIA seems to be somewhat better than for the LCI [4]. Characterization factors exist for a number of additives and for a number of impact categories. Nevertheless, the fist is nowhere near complete. Especially for the impact categories of human toxicity and ecotoxicity, impact factors are missing. Approaches exist to calculate such factors based on substance characteristics. In this volume, LCIA factors are derived for a large number of additives based on such approaches [5]. The lack of such factors, therefore, seems to be less of a problem for including additives in LCA case studies than the lack of LCI data. 

Missing LCIA data have been supplemented by impact factors calculated with USEtox . 

Impact Factor in 2010 6.723 Section Polymer Science Rank 3 of 79... 

Impact Factor in 2007 4.041 Section Chemistry, Inorganic Nuclear ... 

Average Impact Factor of Joumals= 3.75 h-index of papers by the author=23... 

Impact Factor in 2008 6.802 Section Polymer Science Rank 2 of 73... 

Impact Factor in 2009 4.152 Section Chemistry, Inorganic Nuclear Rank 2 of 43 Section Chemistry, Physical Rank 7 of 113... 

Impact Factor 2009 4.291 Section Chemistry, Multidisciphnary Rank 20of 138... 

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