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نمایش تعداد 1-10 از 10
Biochemical Characterization of A Novel Thermophilic Esterase Isolated from Shewanella sp F88
The main objective of this study was to purify and characterize an esterase from Shewanella sp F88. The enzyme was purified 41-fold and an overall yield of 21 %, using a two-step procedure, including ammonium sulfate precipitation and Q...
Influence of clay minerals on sorption and bioreduction of arsenic under anoxic conditions
Adsorption of As(V) on various clay minerals including kaolinite (KGa-1), montmorillonite (SWy-1) and nontronites (NAU-1 and NAU-2), and subsequent bioreduction of sorbed As(V) to As(III) by
bacterium Shewanella putrefaciens strain CN-32 were...
Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition
result of bioreduction of structural Fe(III) in the minerals by Shewanella putrefaciens. The bioreduction of Cd(II)-loaded Fe(III) minerals was negligible during the initial 5 days followed by a rapid increase up to 20 days. The amount of Cd...
بررسی و مقایسه کاهش زیستی آهن فریک ساختمانی در کانیهای نانترونیت، گئوتیت و هماتیت
کاهش زیستی یک فرایند مهم است که بر بسیاری از ویژگیهای کانیهای آهندار و چرخه بیوژئوشیمیایی آهن در اکوسیستمهای طبیعی تأثیر دارد. اکسیهیدروکسیدها و فیلوسیلیکاتهای آهندار دو منبع عمده آهن در خاکها، سنگها و تهنشستها بوده ...
جداسازی و شناسایی باکتری های کاهنده آهن فریک از خاک های شالیزاری شمال ایران
کاهش زیستی آهن فریک در شرایط بی هوازی از دیدگاه زیست محیطی و بیولوژیکی فرایندی بسیار حائز اهمیت میباشد. این فرایند در خاکهای شالیزاری بسیار مورد توجه قرار گرفته و غالباً توسط فعالیت های میکروبی کنترل میشود. آهن فریک یکی ...
Isolation and Identification of Ferric Reducing Bacteria and Evaluation of their Roles in Iron Availability in Two Calcareous Soils
genus and were capable of reducing Fe(III) to Fe(II) in vitro condition. The amount of Fe(III) reduction in sterilized calcareous soils was significantly higher when inoculated with PS23 isolate and Shewanella putrefaciens (S. putrefaciens) (as positive...
Mathematical modeling of two-chamber batchmicrobial fuel cell with pure culture of Shewanella
of electron for a two-chamber batch MFC at constant temperature, in which, lactate is used as the substrate, Shewanella as the microbial culture, and air as the input to the cathode chamber. The proposed model has many parameters. Some of these parameters...
Electrochemical Analysis of Shewanella sp. Behavior In Microbial Fuel Cells
A cube two-chamber microbial fuel cell cultivated with Shewanella sp. was investigated and
analyzed in terms of voltage and current generation behavior, maximum attainable power,
electrochemical activity, and operational considerations...
Dynamic modeling of a continuous two-chamber microbial fuel cell with pure culture of Shewanella
continuous MFC, lactate is used as the substrate, Shewanella as the microbial
agent, and oxygen of air as the final electron acceptor in the cathode chamber. An
experimental setup is applied for the collection of data needed for the verification...
Role of ohmic resistance on the performance of pure culture microbial fuel cell
A cube two-chamber microbial fuel cell cultivated
with Shewanella sp. was investigated and analyzed in terms of
voltage generation behavior, maximum attainable power,
internal resistance, and operational considerations from the...