Celtic animism as givers of life and as links between the physical realm and the other world. Sequana, for example, seems to have embodied the River Seine at its spring source, and Sulis appears to have been one and the same as the hot spring at Bath, Somerset, (Roman Aquae Sulis) not simply its guardian or possessor. In Ireland, the tutelary goddesses Boann and Sionnan give their names to the rivers Boyne and Shannon, and the tales of these goddesses are the origin stories of the rivers themselves. The threefold goddess Brighid is associated with a number of holy wells and The
Aphanizomenon flos-aquae samples exceeded the safety value of 1 µg microcystin per gram. University professor Daniel Dietrich warned parents not to let children consume "A. flos-aquae" products, since children are even more vulnerable to toxic effects, due to lower body weight, and the continuous intake might lead to accumulation of toxins. Dietrich also warned against quackery schemes selling these cyanobacteria as medicine against illnesses such as attention deficit hyperactivity disorder, causing people to omit their regular drugs. A Canadian study studying the effect of "A. flos-aquae" on the immune and endocrine systems, as well as on general blood physiology, found that eating