Detection of mutagenic pollutants of inland and coastal waters by means of theSalmonella/microsomeassay

Abstract

A list of 116 water pollutants was prepared in order to tentatively identify some components critical for the activity of water concentrates in the Salmonella/micTosame mutagenicity test. Data are also reported concerning the recovery of alachlor, atrazine, benzo(a)pyrene, chlorodibromomethane and metolachlor from the aqueous phase by means of reverse osmosis and XAD-2 apolar resin extraction. Chemical analyses showed a consistent even though variable recovery of reference chemicals added to water samples at dose-range of 200-0.5 µgL -1 and concentrated by means of the two procedures. Despite the significant recoveries of selected pollutants, the XAD-2 concentrates of several fresh water and sea water samples showed irregular and weak mutagenic effects on Salmonella typhimurium TA98 and TA100 strains, both in the presence and absence of metabolic activation. The mutagenicity data suggest therefore an insufficient sensitivity of the Ames test and the need of additional end-points of mutagenicity (such as the induction of chromosomal alterations) in the monitoring of mutagenic effects of water concentrates.

A biocompatible, self-adhesive, and stretchable photonic crystal sensor for underwater motion detection

“…48,54 The highest adhesion strength was observed between the sensor and iron (E79 kPa) due to the metal complexation between the metal ion and chemical groups (-NH 2 , CQO, and -COO À ) on the material surface. [55][56][57] The adhesion strength between the PC sensor and human skin (E27 kPa) or nitrile glove (E26 kPa) was also sufficient to form a firm attachment and meet the requirements of wearing, while both the AM-APA network and PEI network are biocompatible, 58,59 indicating that the asprepared PC sensor is biocompatible. Therefore, this sensor could be worn either directly or indirectly.…”