نتایج جستجو برای: a filiculoides
تعداد نتایج: 13431853 فیلتر نتایج به سال:
Nutrients can determine the outcome of the competition between different floating plant species. The response of floating plants to current phosphorus levels may be affected by previously experienced phosphorus concentrations because some species have the ability to store excess phosphorus for later use. This might have an impact on their competition. Here, we investigate the effect of previous...
Dinitrogen fixation by Nostoc azollae residing in specialized leaf pockets supports prolific growth of the floating fern Azolla filiculoides. To evaluate contributions by further microorganisms, the A. filiculoides microbiome and nitrogen metabolism in bacteria persistently associated with Azolla ferns were characterized. A metagenomic approach was taken complemented by detection of N2 O releas...
Experiments were conducted to determine the influence of Chlamydomonas sp. on nitrogen fixation (C(2)H(2) --> C(2)H(4)) in Azolla filiculoides and on the nitrogen fixation and growth of free-living Anabaena azollae 2B organisms. Inoculation of azolla medium with Chlamydomonas sp. was associated with decreased nitrogenase activity in A. filiculoides and with increases in the density of a fungal ...
تحقیق حاضر به مطالعه میزان پروتئین، رطوبت و خاکستر آزولا (azolla filiculoides) در اشکال سبز و قرمز به ترتیب به عنوان شاخصهای رشد در فصلهای تابستان و زمستان پرداخت. همچنین محتوی چربی و ترکیب اسیدهای چرب آزولا به عنوان یکی از اجزای مهم برای تصمیمگیری در رابطه با ارزش غذایی در هر یک از اشکال سبز و قرمز مقایسه گردید. نمونهبرداری از آزولای قرمز و سبز با جمعآوری 20 کیلوگرم آزولای تازه از م...
Arthrobacter species, isolated from the leaf cavities and the microsporocarps of the aquatic fern species Azolla pinnata and Azolla filiculoides, produced indole-3-acetic acid (IAA) in culture when the precursor tryptophan was added to the medium. No IAA production was detected in the absence of tryptophan. Maximum IAA formation was obtained in the first 2 d of incubation. Part of the tryptopha...
The use of Azolla filiculoides (AF) for the removal of Acid Red 88 dye (AR88) from aqueous solutions at different contact times, temperatures, pH, adsorbent doses and initial dye concentration was investigated. The extent of dye removal decreased with increasing adsorbent dosage and AR88 concentration, also increased with increasing contact time and temperature. The adsorption isotherms are des...
Background and Objectives: Beta-carotene was prepared from Azolla by Lejeune et al. (2000). Beta carotene production from Azolla filiculoides in the Anzali wetland has not been investigated in Iran so far. The present project was aimed at determining the content, quality, and purity of β-carotene extracted from Azolla filiculoides in the Anzali Wetland, and comparing it with synthetic β-caroten...
to determine the effective bio-control agents of water fern, azolla filiculoides, adults and nymphs of water lily aphid, rhopalosiphum nymphaeae (l.), were collected on a. filiculoides in guilan province, iran, during october 2013. this aphid has been collected extensively from almost all water fern samples during 2013 and 2014. although r. nymphaeae was reported from numerous host plants in ir...
pollution of water resources by various pollutants is nowadays a global environmental issue. among the different type of water pollutants, dye represents a major polluting group. in this study, azolla filiculides roots have been used for adsorption of malachite green (mg), a cationic dyed from aqueous solution. in this study, effects of operating parameters such as initial concentration of dye ...
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