The NAMEA as validation instrument for environmental macroeconomics

This paper shows how environmental issues can be incorporated into macroeconomic accounting and analysis by the construction and use of a National Accounting Matrix including Environmental Accounts (NAMEA). The paper firstly elaborates on a number of conceptual issues on the harmonisation of environmental statistics and the national accounts. Specific attention is given to the consistent allocation of pollution to production and consumption activities and the importance of aggregated environmental indicators. Further, various applications are presented which vary from simple comparisons of macroeconomic performance indicators for economy and environment to more comprehensive modelling exercises. The paper does not only review recent experiences in the Netherlands but also those from other countries

Het bepalen van overschrijdingskansen voor rivierdijken uit afvoeren en gekorreleerde golfoplopen

Indien de rivierwaterstand zo hoog is, dat de uiterwaarden onderlopen, kunnen de golven een golfoploop tegen de dijk veroorzaken. Uit het gekombineerd optreden van hoge afvoeren en golfoplopen zijn overschrijdingskansen berekend voor een punt van de zuidelijke Waalbandijk stroomafwaarts van Nijmegen

Developing a euro area accounting matrix: issues and applications

Abstract: An important part of external or policy shocks is transmitted throughout the economy via various channels of transactions. To analyse such channels and to predict the impact of shocks, it is expedient to know who recently exchanged what with whom and for what purpose. The most appropriate format for presenting intersectoral linkages at the national level is in a National Accounting Matrix (NAM). A NAM is defined as the presentation of a sequence of integrated accounts and balancing items in a matrix that elaborates the linkages between a supply and use table and institutional sector accounts. This paper compiles the first pilot Euro Area Accounting Matrix (EAAM) and considers its usefulness for the euro area’s economic analysis. It also reports on the solution of a number of aggregation and consolidation issues that arise when constructing a multi-country accounting matrix. JEL Classification: E00, E19euro area, National Accounting Matrix, National Accounts

Developing a euro area accounting matrix: issues and applications

Abstract: An important part of external or policy shocks is transmitted throughout the economy via various channels of transactions. To analyse such channels and to predict the impact of shocks, it is expedient to know who recently exchanged what with whom and for what purpose. The most appropriate format for presenting intersectoral linkages at the national level is in a National Accounting Matrix (NAM). A NAM is defined as the presentation of a sequence of integrated accounts and balancing items in a matrix that elaborates the linkages between a supply and use table and institutional sector accounts. This paper compiles the first pilot Euro Area Accounting Matrix (EAAM) and considers its usefulness for the euro area’s economic analysis. It also reports on the solution of a number of aggregation and consolidation issues that arise when constructing a multi-country accounting matrix

Nonconventional hydrolytic dehalogenation of 1-chlorobutane by dehydrated bacteria in a continuous solid-gas biofilter

Rhodococcus erythropolis NCIMB 13064 and Xanthobacter autotrophicus GJ10 are able to catalyze the conversion of halogenated hydrocarbons to their corresponding alcohols. These strains are attractive biocatalysts for gas phase remediation of polluted gaseous effluents because of their complementary specificity for short or medium and for mono-, di-, or trisubstituted halogenated hydrocarbons (C2-C8 for Rhodococcus erythropolis and C1-C4 for Xanthobacter autotrophicus). After dehydration, these bacteria can catalyze the hydrolytic dehalogenation of 1-chlorobutane in a nonconventional gas phase system under a controlled water thermodynamic activity (aw). This process makes it possible to avoid the problems of solubility and bacterial development due to the presence of water in the traditional biofilters. In the aqueous phase, the dehalogenase activity of Rhodococcus erythropolis is less sensitive to thermal denaturation and the apparent Michaelis-Menten constants at 30°C were 0.4 mM and 2.40 μmol min−1 g−1 for Km and Vmax, respectively. For Xanthobacter autotrophicus they were 2.8 mM and 0.35 μmol min−1 g−1. In the gas phase, the behavior of dehydrated Xanthobacter autotrophicus cells is different from that observed with Rhododcoccus erythropolis cells. The stability of the dehalogenase activity is markedly lower. It is shown that the HCl produced during the reaction is responsible for this low stability. Contrary to Rhodococcus erythropolis cells, disruption of cell walls does not increase the stability of the dehalogenase activity. The activity and stability of lyophilized Xanthobacter autotrophicus GJ10 cells are dependant on various parameters. Optimal dehalogenase activity was determined for water thermodynamic activity (aw) of 0.85. A temperature of 30°C offers the best compromise between activity and stability. The pH control before dehydration plays a role in the ionization state of the dehalogenase in the cells. The apparent Michaelis-Menten constants Km and Vmax for the dehydrated Xanthobacter autotrophicus cells were 0.07 (1-chlorobutane thermodynamic activity) and 0.08 μmol min−1 g−1 of cells, respectively. A maximal transformation capacity of 1.4 g of 1-chlorobutane per day was finally obtained using 1g of lyophilized Xanthobacter autotrophicus GJ10 cell