Investigation of the role of cell hydrophobicity and EPS production in the aggregation of the marine diatom Cylindrotheca closterium under hypo-saline conditions.

Aggregation of diatoms is of global importance to understand settling of particulate organic carbon in aquatic systems. In this study, we investigate the aggregation of the marine diatom Cylindrotheca closterium during the exponential growth phase under hypo-saline conditions. The results of the flocculation/flotation experiments show that the aggregation of the diatom depends on the salinity.

[Hemoptysis revealing an endobronchial metastasis of testicular choriocarcinoma].

The choriocarcinoma are neoplasms developed from testicular germ cells in men or fetal trophoblasts in women. The most common sites for metastatis are in the lung, but the endobronchial location is unusual. We report the case of a young patient of 27 years, hospitalized for hemoptysis of moderate volume, occurring in the context of deterioration in his general condition.