نتایج جستجو برای: a filiculoides

تعداد نتایج: 13431853  

2016
Edwin T. H. M. Peeters Rozemarijn E. M. Neefjes Bastiaan G. van Zuidam

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...

Journal: :The New phytologist 2018
Laura W Dijkhuizen Paul Brouwer Henk Bolhuis Gert-Jan Reichart Nils Koppers Bruno Huettel Anthony M Bolger Fay-Wei Li Shifeng Cheng Xin Liu Gane Ka-Shu Wong Kathleen Pryer Andreas Weber Andrea Bräutigam Henriette Schluepmann

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...

Journal: :Applied and environmental microbiology 1986
M Habte

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 ...

ژورنال: :زیست شناسی کاربردی 2014
گل نوش وارسته مؤخر1 مهدی شمسایی مهرگان هومن رجبی اسلامی فرشته نعمت اللهی

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...

Journal: :Journal of general microbiology 1992
C Forni J Riov M Grilli Caiola E Tel-Or

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...

2016
Davoud Balarak Yousef Mahdavi

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...

Journal: :journal of crop protection 2015
farahpour-haghani atousa mahdi jalaeian mohsen mehrparvar

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...

Journal: :journal of physical and theoretical chemistry 0
zohreh khoshraftar science and research branch, islamic azad university, tehran, iran ali shamel department of chemistry, ardabil branch, islamic azad university, ardabil, iran.

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 ...

Journal: :Bulletin de la Société Botanique de France 1888

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