The purpose of this test is to determine the effects of a substance on the growth of freshwater microalgae and/or cyanobacteria. Exponentially growing test organisms are exposed to the test substance in batch cultures over a period of normally 72 hours. The system response is the reduction of...

This Test Guideline is designed to assess the effects of prolonged exposure to chemicals on the growth of juvenile fish. Juvenile fish in exponential growth phase are placed, after being weighed, in test chambers and are normally exposed to five sublethal concentrations of the test substance...

This Test Guideline is designed to assess the toxicity of substances to freshwater aquatic plants of the genus Lemna (duckweed). Exponentially growing plant cultures of the genus Lemna (Lemna gibba and Lemna minor usually) are allowed to grow as monocultures in, at least, five concentrations of...

The Regulatory Policy Scan of Bulgaria assesses the country’s regulatory management capacity by taking stock of regulatory policies, institutions and tools, describing trends and recent developments, and identifying gaps in relation to good practices. Improving the entire regulatory policy...

Developing countries are concerned that multilateral tariff reductions will harm their agricultural sectors because of preference erosion. The findings in this report suggest that although this may indeed be a problem for some countries in some sectors, factors other than preferential schemes...

Developing countries are concerned that multilateral tariff reductions will harm their agricultural sectors because of preference erosion. The findings in this report suggest that although this may indeed be a problem for some countries in some sectors, factors other than preferential schemes...