Correlation between heavy metal acute toxicity values inDaphnia magna and fish

The chemical, toxicological and ecological studies in assessing the heavy metal pollution in Le An River, China

“…At A01, while the index for water chemistry and bioassays proved to be slightly-to-moderately polluted in the rainy season, the ecosystem is still healthy (ecological assessment showed no alteration), due to its tolerability. The observed sediment toxicity on D. magna might be caused by high concentration of zinc (ECs0 for Zn is 0.54:tg/1; Khangarot and Ray, 1987) in the rainy season.…”

A New Low-Cost Microbiotest with the ProtozoanSpirostomum teres: Culture Conditions and Assessment of Sensitivity of the Ciliate to 14 Pure Chemicals

“…The first was the 9-h IC , which, according to the authors, was better than the inhibition calculated respectively after 3 and 6 h exposure, because it was more comparable to the ''dynamic IC .'' The authors reported that the IC determined after 9 h gave LOW-COST MICROBIOTEST WITH Spirostomum teres Lilius et al, 1994;@Khangarot and Ray, 1987;ABelabed et al, 1993;BKu¨hn et al, 1989;CGuilermino et al, 1996;DSauvant et al, 1995a;g Le Duˆet al, 1993;FSauvant et al, 1995b;GDive et al, 1989;HScha¨ffer et al, 1994;ILe Duˆ, 1992;JWiger, 1985;*48- some information about the state of the ¹. pyriformis population at a given time, like a ''photograph'', although the second parameter (dynamic IC ), which was calculated from the real doubling time of populations treated for 9 h, indicated better all the events that occurred at different times, like ''a movie''. For this reason, the authors considered that this last parameter was the best index for cytotoxicity evaluation of xenobiotics with ¹. pyriformis.…”

Assessment of Seasonal Changes in the Water chemistry of Valapattanam and Munderikadavu River in Kerala, Tamilnadu, India

“…Several workers Sponza and Karaoglue, 2002;Rewat et al, 2003;Sing and Mosley, 2003 previous scientific report states that during this study seasons Pre-monsoon and Post-monsoon, in these study area many health problems are have been reported. Nickel toxicity is generally low (Khangarot and Ray, 1990) but elevated concentration can cause sub lethal effects.…”