Phytoplanktons are the first bio- indicators of pollution in aquatic ecosystems. Phytoplankton assemblage and aquatic ecosystems are always influenced by environmental factors therefore these environmental changes and threats must be understood in any ecosystem. Phytoplankton are inexpensive and readily available bio- indicators. In the present study, phytoplankton were used to study the Sefid ...

  Various parasite species were found in Carassius carassius including Diplostomum spathaceum, Dactylogyrus sp.,Gyrodactylus sp. Ichthyophthirius multifiliis and Trichodinia sp . They were found in four rivers in West Azerbaijan Province (North-Western Iran) . A total of 207 live Carassius carassius from four rivers including Aras (72) Zariyneh (42) Nazlo (58) and Barandoz (35) were studied. Pa...

Background: Zayandeh-rud river is the most important in central regions of Iran and present study aimed to provide new insights into microplastics (MPs) pollution surface water sediments this river. Methods: Water sediment samples were collected July 2021 from 19 sampling sites along Organics matters removed by wet peroxide oxidation (WPO), MPs extracted floatation ZnCl2 -saturated salt filtrat...

The diurnal rhythm in the urinary excretion of 17-ketosteroids and neutral reducing lipids has been reported by Pincus. 1) On the other hand the diurnal variation of circulating eosinophils in normal subjects has been studied by Rud,2) Bonner3) and others.4) 5) The characteristic feature in diurnal rhythm of urinary steroids is an increase in the morning especially after awakening. Meanwhile th...

The electrocatalytic ability of the iron-substituted crown-type polyoxometalate (POM) Li4K16[P8W48O184Fe16(OH)28(H2O)4]66H2O2KCl (P8W48Fe16) towards the reduction of both nitrite and hydrogen peroxide reduction has been studied in both the solution and immobilized states for the POM. P8W48Fe16 was surface immobilised onto carbon electrode surfaces through employment of the layer-bylayer techn...

W artykule zaproponowano rozwiązanie aktualnego problemu naukowego polegającego na opracowaniu geometrycznej metody prognozowania wskaźników jakości złóż rud żelaza, z zastosowaniem modelu matematycznego wielowymiarowego losowego pola geochemicznego, realizowanego wykorzystaniem samoorganizujących metod predykcyjnych. Autorzy opracowują wielowymiarowy algorytm predykcji heurystycznej, wykorzyst...

Abstract Background The timing, magnitude, and duration of extreme hydrological disasters have the potential to threaten species diversity river habitats. On August 8, 2014, 19, 2017, disastrous floods struck mountainous regions Iran’s Zarin Gol River basin. Macroinvertebrate communities were studied at seven upstreams prior in June 2014 2017 after September 9 months second flood 2018. effects ...

decreasing water resources has made optimum water allocation in agriculture essential. planning optimum irrigation and crop production function considering accessible water and growing stage is an efficient approach to increase water productivity. studies have applied this approach to maximize crop production using the fao crop production method introduced in 1979. however, the fao introduced a...