JCB • VOLUME 170 • NUMBER 6 • 2005 864 " Porterplasm " and the microtrabecular lattice eith Porter was to many the father of biological electron microscopy (EM) and even of cell biology. He helped instigate the founding both of this journal and of the K American Society of Cell Biology, and was a key figure in defining the structures of intact and sectioned cells. The latter stages of Keith Por...

The lemmatizer wmtrans developed by Canoo Engineering AG (Canoo 2012) and the Porter stemmer (Porter 1997) will be compared regarding their influence on information retrieval quality. Based on test data from CLEF 2002.