نتایج جستجو برای: oscillatoria spp
تعداد نتایج: 51371 فیلتر نتایج به سال:
مقدمه: در سال های اخیر، استفاده از روتیفرها به عنوان غذای زنده برای پرورش لارو ماهیان و سخت پوستان، اهمیت پیدا کرده است. روتیفرها با دارابودن ویژگی هایی از جمله اندازه مناسب، ارزش غذایی و شنای آرام دارای قابلیت زیادی در پرورش مراحل اولیه لارو آبزیان مختلف هستند. رشد و تراکم به عنوان فاکتورهای مهم در تولید روتیفرها محسوب می شوند. مواد و روش ها: در مطالعۀ حاضر در شرایط آزمایشگاهی اثر 3 غلظت مختلف...
We tested the recolonization of the phytobenthic community in the tailwaters of Glen Canyon Dam following longand short-term experimentally induced desiccation. The response of Cladophora glomerata, Oscillatoria spp., miscellaneous phytobenthos species and periphyton was studied over 18 weeks using three treatments: (1) undisturbed control cobbles from the submerged zone; (2) cobbles desiccated...
Different depths within a metalimnetic layer of Oscillatoria rubescens were sampled, and changes in biochemical composition and photosynthetic rate were analyzed. Although differences in pigment and protein content were found, the photosynthetic rates of the samples were not significantly different.
Biosorption of Cd(II) ions from aqueous solutions by native and dried Oscillatoria sp. Cyanobacterium biomass was investigated in the batch mode. The Oscillatoria sp. was prepared from Molecular and Cell Laboratory of University of Mazandaran and grown in BG-11 medium. A comparison of Cd(II) adsorption properties of dried with native Oscillatoria sp. biomass was made, the dried one showed a hig...
In order to assessing whether algae can reduce the pollution concentration of the effluents by absorbing the nutrients, it is found that effluents can effectively be treated by employing algal organisisms such as Oscillatoria and Stigeoclonium species and these organisms are frequently found in the polluted waters and they were recorded as pollution tolerant forms. In the laboratory procedures ...
The algae, Oscillatoria, is commonly found in prawn ponds and can lead to reduced productivity. We examined metabolites of the bacteria Brevibacillus laterosporus for algicidal qualities. To determine the possible algicidal mechanisms of these bioactive metabolites, different amounts of sterile filtrate of bacterial suspensions were added to cultures containing Oscillatoria. The dry weight, the...
Phytonutrients and pigments present in cyanobacteria act as antioxidants, which facilitate the formation of body's defense mechanism against free radical damage to cells. The aim of this investigation was to study the total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, phycobiliproteins (PBPs), and active compounds in four cyanobacterial species, that is, Oscillat...
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