Sublethal concentrations

In the present study, to evaluate a microalga’s responses to a macronutrient’s limitation and the excess to a micronutrient, we acclimated the well-distributed freshwater microalga Ankistrodesmus densus to N- or P-limited medium before exposing it to sublethal copper (Cu) concentrations.

6p thebadguys 15-01-2022 5 0   Download

The current study includes the histopathological alterations induced by chronic (20 days) exposure of the fish Anabas testudineus to a sublethal concentrations (27.5 mg/L) of inorganic fertilizer, Urea [CO(NH2)2]. Some vital organs were taken for the study that is kidney, liver, intestine, testis and ovary. The present study showed major histopathological alteration like vacuolar degenerative changes, necrosis etc. found in liver, intestine, testis, ovary and kidney organs dysfunction in response to urea toxicity effect in the fish A. testudineus.

10p chauchaungayxua12 29-07-2021 11 2   Download

The current study includes the histopathological alterations induced by chronic (20 days) exposure of the fish Anabas testudineus to a sublethal concentration (0.092 g/L) of inorganic fertilizer, Di-ammonium phosphate. Some vital organs were taken for the study that is kidney, liver, intestine, testis and ovary. The present study showed major histopathological alteration like vacuolar degenerative changes, necrosis etc. found in liver, intestine, testis, ovary and kidney organs dysfunction in response to DAP toxicity effect in the fish A. testudineus.

9p cothumenhmong11 11-05-2021 10 1   Download

The present investigation was taken up under controlled ambient laboratory conditions (conditioning/lethal toxicity/sublethal toxicity studies: pH: 7.1±0.2; salinity: 1 ppt; temperature: 32±2˚C; alkalinity: 220±18 ppm; hardness: 380±26 ppm; dissolved oxygen: 8.0±0.6 ppm) to examine the pesticide induced changes in selected biochemical parameters of fingerling common carp exposed to sub-lethal concentrations (1/10th& 1/5th LC50) of dichlorvos.

8p chauchaungayxua10 18-03-2021 5 1   Download

Dichlorvos, one of the extensively used insecticides was investigated in the present study for acute and sublethal toxicity. Fingerlings of common carp (Cyprinus carpio) were selected for the bioassay experiments. The 96 hour LC50 value was found to be 21.11 ppm. For sublethal toxicity study two concentrations i.e. 1/5th and 1/10th of LC50 were selected and semi-static bioassay method was used for 28 days (4 weeks) to observe pesticide induced changes in physiological activities (Feed consumption rate and Ammonia excretion rate).

6p cothumenhmong3 22-02-2020 8 0   Download

Experiment was conducted to study the effect of eCO2 and eTemp on the on the larval and pupal developmental periods of S. litura after exposed to sublethal concentrations of insecticide viz., spinosad, emamectin benzoate, thiodicarb and monocrotophos. Among these insecticides emamectin, thiodicarb and monocrotophos was positively related with temperature and proved effective at higher temperatures, whereas spinosad was negatively related with temperature. The test insecticides prolonged the larval and pupal durations with increase in sublethal concentrations.

10p trinhthamhodang3 14-02-2020 9 2   Download

The effects of a sublethal concentration of three plant growth regulators (PRGs) on serum enzymes in rats were investigated under laboratory conditions. 100-ppm of PRGs, indoleacetic acid (IAA), indolebutiric acid (IBA) and kinetin were administered orally to 8 rats ad libitum for 3 weeks.

5p caplock2711 19-02-2019 30 0   Download

Antioxidant responses in the estuarine mysid, Mesopodopsis zeylanica, were used to assess mercury (Hg) metal contamination in relation to salinity. Natural mysids acclimatized at 5 psu were subjected to laboratory exposures of 5, 15, and 25 psu salinity singly and under the sublethal Hg concentration of 5 µg/L (one-fifth of 24 h LC50 value).

8p vivant2711 01-02-2019 18 1   Download

Risk assessment is an inexact science. Successful risk assessment practitioners rely heavily on extensive and well-documented databases.

1867p 951864273 11-05-2012 118 42   Download

CHAPTER 6 The Effects of Gold on Plants and Animals Lethal and sublethal effects of Au0, Au+, and Au+3 are summarized for aquatic organisms and laboratory mammals. Gold accumulations from solution are documented for microorganisms and other living resources under various physicochemical conditions. 6.1 AQUATIC ORGANISMS This section summarizes lethal and sublethal effects of Au+ and Au+3 on aquatic microorganisms, plants, fishes, and amphibians. 6.1.1 Monovalent Gold Monovalent gold is toxic to aquatic biota at comparatively elevated concentrations of 7.

23p bengoan741 22-12-2011 70 5   Download