A whole sample toxicity assessment to evaluate the sub-lethal toxicity of water and sediment elutriates from a lake exposed to diffuse pollution

2009 ◽  
Vol 24 (3) ◽  
pp. 259-270 ◽  
Author(s):  
N. Abrantes ◽  
R. Pereira ◽  
D. R. de Figueiredo ◽  
C. R. Marques ◽  
M. J. Pereira ◽  
...  
Keyword(s):  
Toxicity Assessment ◽  
Diffuse Pollution ◽  
Water And Sediment ◽  
Lethal Toxicity ◽  
Sediment Elutriates

scholarly journals Allium cepa Bio Assay to Assess the Water and Sediment Cytogenotoxicity in a Tropical Stream Subjected to Multiple Point and Nonpoint Source Pollutants

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
W. M. Dimuthu Nilmini Wijeyaratne ◽  
L. G. Y. J. G. Wadasinghe
Keyword(s):  
Root Growth ◽  
Allium Cepa ◽  
Water Samples ◽  
Root Tip ◽  
Sediment Samples ◽  
Water And Sediment ◽  
Sediment Elutriates ◽  
Tip Cells ◽  
Root Tip Cells ◽  
Water And Sediment Samples

The present study was conducted to assess the cytotoxicity of water and sediments of an industrial effluent receiving water body in the western province of Sri Lanka using Allium cepa bioassay. Six sampling sites (Site A: Urban; B: Industrial; C: Water intake for public water supply; D: Industrial; E: Agricultural; F: Reference) were selected from the study area. Ten replicate water and sediment samples were collected from each site, and physical and chemical parameters were measured using standard analytical methods. Cytotoxicity of water and sediment elutriates were measured using Allium cepa bioassay. Despite the significant spatial variations, the overall water and sediment quality parameters of the study sites were in accordance with the standard ambient environment parameters to sustain a healthy aquatic life. In the A. cepa bulbs exposed to water samples, significant root growth variations were not observed within 48 hours of exposure. However, significant root length variations were observed in A. cepa bulbs exposed to sediment elutriates within the 48-hour exposure and the percentage root growth inhibition increased with increase of exposure time. Similar trend was observed in mitotic activity indicating significantly lower mitotic indices (compared to that of the reference site) in A. cepa root tip cells exposed to sediment elutriates than those exposed to water samples. Further, the highest number of nuclear abnormalities was recorded from root tip cells of A. cepa exposed to water and sediment samples from sites B, C, and D. Therefore, it is of extreme importance to identify the composition and speciation of these cytogenotoxic compounds in the tropical climatic conditions and to propose possible clean-up or treatment solutions to overcome this environmental and public health risk associated problem.

Sub-lethal toxicity assessment of the phenylurea herbicide linuron in developing zebrafish (Danio rerio) embryo/larvae

2020 ◽  
Vol 81 ◽  
pp. 106917
Author(s):  
Sapna Maharaj ◽  
Nader El Ahmadie ◽  
Spencer Rheingold ◽  
Jana El Chehouri ◽  
Lihua Yang ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Toxicity Assessment ◽  
Phenylurea Herbicide ◽  
Lethal Toxicity

Cyclooxygenese-2 promoter can mittigate the lethal toxicity in HSV-TK based adenoviral suicide gene therapy of gastrointestinal cancers

2001 ◽  
Vol 120 (5) ◽  
pp. A10-A10
Author(s):  
M YAMAMOTO ◽  
R ALEMANY ◽  
Y ADACHI ◽  
W GRIZZLE ◽  
D CURIEL
Keyword(s):  
Gene Therapy ◽  
Suicide Gene ◽  
Suicide Gene Therapy ◽  
Gastrointestinal Cancers ◽  
Lethal Toxicity

Toxicity assessment of the aqueous root extract of Sanseviera Liberica (Agavaceae)

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
OO Adeyemi ◽  
MB Amida ◽  
OK Yemitan
Keyword(s):  
Toxicity Assessment ◽  
Root Extract ◽  
Aqueous Root Extract

Effect of carbofuran on quantitative and qualitative alterations in haemolymph of larva of Oryctes rhinoceros L. (Coleoptera: Scarabaeidae)

ENTOMON ◽  
2020 ◽  
Vol 44 (4) ◽  
pp. 293-300
Author(s):  
V.S. Salini
Keyword(s):  
Oral Route ◽  
Toxicity Assessment ◽  
Haematological Parameters ◽  
Oryctes Rhinoceros ◽  
Total Haemocyte Count ◽  
Differential Haemocyte Count ◽  
Third Instar Larvae

Investigation to evaluate the toxicity of carbofuran pesticides on haematological parameters of third instar larvae of Oryctes rhinoceros L. Indicated alterations in total haemocyte count and differential haemocyte count for toxicity assessment. Various doses of carbofuran (0.05g, 0.010g and 0.015 g) applied on insect through oral route and its impact after 24 hours of its application revealed that various doses of carbofuran exert specific alterations in both total and differential haemocytes of insect haemolymph.

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