نتایج جستجو برای: lethal concentration

تعداد نتایج: 421535  

Journal: :caspian journal of environmental sciences 2014
al et m. farhangi

this study was accomplished to examine the efficiency of natural zeolite in preventing acute toxicity of total ammonia to huso huso. the study was performed using water static method in 96 hours. fish averaged 46 ? 5 g in weight and 22 ? 4 cm in total length were exposed to four different concentrations (15, 30, 50, 75 mgl-1) of ammonia and a group was considered as control. under stable condit...

Journal: :iranian journal of toxicology 0
saeid shahbazi naserabad msc of aquatic ecology, young researchers and elite club,yasooj branch, islamic azad university, yasooj, iran. alireza mirvaghefi department of fisheries, university of tehran, karaj, iran. ghasem rashidiyan phd candidate of fisheries aquaculture, young researchers and elites club, science and research branch, islamic azad university, tehran, iran. narges rostamian msc.of aquatic ecology, department of fisheries, college of environment karaj, karaj, iran. hamed ghafari farsani phd candidate of aquaculture young researchers and elite club, shahrekord branch, islamic azad university, shahrekord, iran.

background: edifenphos, a kind of organophosphate toxins, is used as agricultural fungicides in rice fields. this study was aimed to investigate the effect of temperature on lethal concentration of exposure to edifenphos on rutilus frisii kutum (caspian kutum). methods: the experiment was carried out in static condition and based on instructions of oecd within 10 d under controlled water physic...

A. Kuçukgul Gulec, B. Altinterim, O. Aksu,

In this study, lethal concentration (LC50) values of cinnamon hydrosol (Cinnamomum zeylanicum) on carp (Cyprinus carpio) were investigated. In practice, experimental setup was constituted 30 fish (a total of 180 fish with 30 control fish) to be placed in three replicates. Hydrosol was added into aquariums at the doses of 0.5, 1, 2.5, 5 and 10% and determined mortality times of carp exposed to t...

A. Kuçukgul Gulec, B. Altinterim O. Aksu

In this study, lethal concentration (LC50) values of cinnamon hydrosol (Cinnamomum zeylanicum) on carp (Cyprinus carpio) were investigated. In practice, experimental setup was constituted 30 fish (a total of 180 fish with 30 control fish) to be placed in three replicates. Hydrosol was added into aquariums at the doses of 0.5, 1, 2.5, 5 and 10% and determined mortality times of carp exposed to t...

ژورنال: بوم شناسی آبزیان 2015
Asadi, Mohammad , Johari, Seyed Ali , Mazarei, Sajedeh , Sajjadi, Mir Masoud , Sourinejad, Iman ,

Rising trend of production and use of nanoparticles can lead to the possibility of their release into aquatic environments. Therefore, knowing toxic effects of these materials on aquatic organisms is of great importance. The objective of this research was to study the acute toxicity of colloidal silver nanoparticles (CAgNPs) through determining the lethal concentrations in the euryhaline teleos...

Journal: :بهره برداری و پرورش آبزیان 0
نیما شیری دانش آموخته کارشناسی ارشد بوم شناسی آبزیان، گروه شیلات و محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران. خدیجه خوشنودی فر دانش آموخته کارشناسی ارشد تکثیر و پرورش آبزیان،گروه شیلات و محیط زیست، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان. غلامرضا رفیعی استاد گروه شیلات و محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران علیرضا میرواقفی دانشیار گروه شیلات و محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران.

in present study, it was determinated lc50 96-h and toxicity degree of diazinon in huso huso, then were evaluated effects of sub-lethal concentrations on tow general enzymatic indices including alanine and aspartate aminotransferase of plasma and one specific enzymatic index including tissue ache enzyme. the median lethal concentration, lowest observed effect concentration and maximum allowable...

Journal: :caspian journal of environmental sciences 2008
m.s. prashanth

freshwater fish cirrhinus mrigala were exposed to lethal concentration (5 mg/l) for 1,2,3,4 days and sublethal concentration (1 mg/l) for 1,7,14,21 days of cypermethrin to examine the enzymes activity, in functionally three different tissues namely, gill, liver and muscle. activities of aspartate aminotransferase (aat), alanine aminotransferase (alat) and glutamate dehydrogenase (gdh) increased...

Freshwater fish Cirrhinus mrigala were exposed to lethal concentration (5 mg/L) for 1,2,3,4 days and sublethal concentration (1 mg/L) for 1,7,14,21 days of cypermethrin to examine the enzymes activity, in functionally three different tissues namely, gill, liver and muscle. Activities of Aspartate aminotransferase (AAT), Alanine aminotransferase (AlAT) and Glutamate dehydrogenase (GDH) increased...

al et M. Farhangi

This study was accomplished to examine the efficiency of natural zeolite in preventing acute toxicity of total ammonia to Huso huso. The study was performed using Water Static Method in 96 hours. Fish averaged 46 ? 5 g in weight and 22 ? 4 cm in total length were exposed to four different concentrations (15, 30, 50, 75 mgL-1) of ammonia and a group was considered as control. Under stable condit...

Journal: :Bali Medical Journal 2021

Introduction: Diarrhea is still a considerable health problem today, especially in developing countries, including Indonesia. One common etiology of diarrhea Vibrio cholerae, which causes many problems, such as inappropriate use antibiotics antibiotic resistance. The golden sea cucumber (Stichopus hermanii) has antibacterial potential against cholera. This study aims to determine the effect and...

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