نتایج جستجو برای: sublethal dose

تعداد نتایج: 313593  

ژورنال: بوم شناسی آبزیان 2016
Davoodi, Reza, Gholami, Razieh, Nooryazdan, Hamidreza, Oujifard, Amin,

We conducted this study to determine the chronic effects of Azadirachtin on growth parameters, survival and gill morphology of grass carp [Ctenopharyngodon idella (C. idella)] with an average weight of 11.09±2.3g. We equally distributed 120 fish between three treatments and a control group, with three replicates each. Sublethal concentrations of poison, 0.073 (10% LC50), 0.15 (20% LC50), 0.22...

Journal: :Agriculture 2021

Weeds represent an increasing challenge for crop systems since they have evolved adaptability to adverse environmental conditions, such as salinity stress. Herbicide effectiveness can be altered by the quality of water in which weed is growing. This research aimed study combined effect salt stress and recurrent selection with a sublethal dose imidazolinone herbicides shifting sensitivity Echino...

Journal: :The Journal of biological chemistry 1994
G Chu

The anticancer drug cisplatin provokes a complex response in the cell. A lethal dose of the drug kills cells primarily by forming DNA adducts, causing G2 arrest in the cell cycle, and then triggering apoptosis. A sublethal dose induces drug resistance by several mechanisms, including changes in drug uptake and efflux, glutathione and metallothionein levels, and DNA repair. Cisplatin-DNA adducts...

Journal: :Cancer research 1979
T Christensen J Moan

Dose-response curves for inactivation of synchronized cells from the human cell line NHK 3025 in the presence of hematoporphyrin and light are shown. Sensitivity toward photodynamic inactivation is increasing as the cells move in the cell cycle from G1 to mid-S. The increase is mostly due to a change in the extent of the shoulder of the dose-response curve at low doses. The quasithreshold dose ...

Journal: :Applied and environmental microbiology 1983
G F Griffin F S Chu

The effects in the chicken embryo assay of four Alternaria metabolites (alternariol [AOH], alternariol methyl ether [AME], altenuene [ALT], and tenuazonic acid [TA]) were investigated. Administered to 7-day-old chicken embryos by yolk sac injection, AOH, AME, and ALT caused no mortality or teratogenic effect at doses up to 1,000, 500, and 1,000 micrograms per egg, respectively. TA exhibited a c...

2013
ABHIK GUPTA

Indian flying barb (Esomus danricus) was exposed to sublethal concentrations of 636.3, 63.6 and 6.3 μgl-1 Cadmium for 28 days and intestinal histopathology was observed by light microscopy after staining with Haematoxylin-Eosine. Exposed fishes showed severe to mild superficial erosion of mucosa, dense lamina propria, chronic inflammatory cell infiltration as well as vacuolation. With the incre...

2017
Tanya Sabharwal Kanagasabapathi Sathasivan Mona C Mehdy

Diatoms rapidly release extracellular oxylipins (oxygenated lipids) including polyunsaturated aldehydes in response to herbivory and other stresses. Oxylipins have several defense-related activities including inhibition of reproduction in herbivores and signaling to distant diatoms. Physiological changes in diatoms exposed to varying levels of oxylipins are only beginning to be understood. In t...

Journal: :Chemosphere 2009
Uddhav Suryavanshi R A Sreepada Z A Ansari Subhanchi Nigam Shahin Badesab

Endosulfan, a broad-spectrum non-systemic organochlorine (OC) pesticide is extensively used to control a wide variety of pests in agriculture, horticulture and public health programmes. Biochemical changes occurring in the metabolically active tissues of gills (GL), hepatopancreas (HP) and muscle (MU) of the penaeid shrimp, Metapenaeus monoceros (Fabricius) on exposure to two sublethal doses (4...

Journal: :Semina-ciencias Agrarias 2021

Glyphosate drift in plants that are not resistant to the herbicide molecule can result stimulation certain biological features, characterizing phenomenon of hormesis. On this basis, productive and chemical traits were evaluated marandu grass, a simulation effect, using sublethal doses glyphosate. The experiment was laid out randomized-block design with split plots time, four replicates. effect ...

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