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  • Paramecia are unicellular eukaryotes of large size (~ 120 micrometers for P aurelia species) that belong to the ciliate phylum. Ciliates, like the Last Eukaryotic Common Ancestor, have the axonemal structure in the form of vibrating cilia that assure locomotion and food capture and are essential for pairing of paramecia of opposite mating types during conjugation (sexual reproduction). Like multicellular eukaryotes, ciliates separate germinal and somatic functions, harbouring two different kinds of nuclei. A diploid germinal micronucleus transmits the genetic information to the next sexual generation, while a polyploid somatic macronucleus is responsible for gene expression. Reproducible DNA elimination, which occurs in many animal lineages, takes place in ciliates during sexual reproduction, when a new somatic macronucleus develops from a copy of the germline micronucleus. The somatic genomes of numerous Paramecium species are being sequenced and annotated. ParameciumDB integrates the genomes as they become available, to provide resources for functional and comparative genomics to the community. ParameciumDB interfaces and tools have been redesigned. Your feedback is welcome.

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  • This site provides access to Grey Literature from Europe. The interface is available in French and English. This site replaces OpenSIGLE. The content is available in a variety of European languages.

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  • The ETOX database allows access to effects information from aquatic and terrestrial ecotoxicology. Furthermore, ETOX contains information on various national and international environmental quality guidelines, targets, standards, criteria, and limit values. In focus are substances which are relevant for assessment of surface water pollution to trigger the development of environmental quality standards according to Water Framework Directive 60/2000/EC.

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4,464 Data sources
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  • Paramecia are unicellular eukaryotes of large size (~ 120 micrometers for P aurelia species) that belong to the ciliate phylum. Ciliates, like the Last Eukaryotic Common Ancestor, have the axonemal structure in the form of vibrating cilia that assure locomotion and food capture and are essential for pairing of paramecia of opposite mating types during conjugation (sexual reproduction). Like multicellular eukaryotes, ciliates separate germinal and somatic functions, harbouring two different kinds of nuclei. A diploid germinal micronucleus transmits the genetic information to the next sexual generation, while a polyploid somatic macronucleus is responsible for gene expression. Reproducible DNA elimination, which occurs in many animal lineages, takes place in ciliates during sexual reproduction, when a new somatic macronucleus develops from a copy of the germline micronucleus. The somatic genomes of numerous Paramecium species are being sequenced and annotated. ParameciumDB integrates the genomes as they become available, to provide resources for functional and comparative genomics to the community. ParameciumDB interfaces and tools have been redesigned. Your feedback is welcome.

    more_vert
  • This site provides access to Grey Literature from Europe. The interface is available in French and English. This site replaces OpenSIGLE. The content is available in a variety of European languages.

    more_vert
  • more_vert
  • The ETOX database allows access to effects information from aquatic and terrestrial ecotoxicology. Furthermore, ETOX contains information on various national and international environmental quality guidelines, targets, standards, criteria, and limit values. In focus are substances which are relevant for assessment of surface water pollution to trigger the development of environmental quality standards according to Water Framework Directive 60/2000/EC.

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