Using Sets of Geochemical Analyses and Toxicity Tests to Assess the Effects of Sewage Disposal in Santos Bay, Brazil

2014 ◽  
Vol 2014 (3) ◽  
pp. 34-47 ◽  
Author(s):  
Denis Abessa ◽  
◽  
Eduinetty Sousa ◽  
Bauer Rachid ◽  
Leticia Zaroni ◽  
...  
Keyword(s):  
Toxicity Tests ◽  
Sewage Disposal ◽  
Geochemical Analyses

The Private Sewage Disposal Plant

1912 ◽  
Vol 106 (15) ◽  
pp. 332-332
Author(s):  
Jacolyn Van Vliet Manning
Keyword(s):  
Sewage Disposal

Birds and Sewage Disposal

1924 ◽  
Vol 130 (6) ◽  
pp. 398-398
Author(s):  
Leon Augustus Hausman
Keyword(s):  
Sewage Disposal

Study of the radiomodifier effect of Pityrocarpa moniliformis extract

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
João Victor Torres de Moraes ◽  
Ricardo Luiz Calazans Luna Filho ◽  
Williams Nascimento de Siqueira ◽  
Hianna Arely Milca Fagundes Silva ◽  
Dewson Rocha Pereira ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Cellular Response ◽  
Biomphalaria Glabrata ◽  
Toxicity Tests ◽  
Antioxidant Compounds ◽  
Blastula Stage ◽  
Natural Substances ◽  
60Co Source ◽  
60Co Gamma ◽  
60Co Gamma Radiation

Ionizing radiation has been applied in several areas of knowledge, among them the study of the radiomodifier activity of natural substances. These substances can modify the cellular response to the damage induced by the radiation. Therefore, this work aimed to evaluate the radiomodifier action of Pityrocarpa moniliformis extract on Biomphalaria glabrata embryos exposed to 60Co gamma radiation. Initially, toxicity tests were performed on the extract against the B. glabrata embryos for the choice of concentration that did not cause death and embryonic malformation. Then, the antioxidant activity of the P. moniliformis extract with flavonoids and phenolic compounds was evaluated by means of the ABTS method. To evaluate the radiomodifier activity of the extract, embryos were selected in the blastula stage and irradiated with 7.5 Gy in a 60Co source (gammacell-Co60). Then, the embryos were exposed for 24 h to the extract of P. moniliformis at a concentration of 250 μg/mL. The results showed that the extract of P. moniliformis presents flavonoids and enzymatic inhibition by ABTS, which demonstrates the presence of antioxidant compounds. However, the tests of the radiomodifier activity did not present radioprotective effect for embryos exposed to ionizing radiation.

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