نتایج جستجو برای: super paramagnetic iron oxide
تعداد نتایج: 363312 فیلتر نتایج به سال:
Introduction: Recent findings revealed the biological effects of iron oxide nanoparticles on the central nervous system. Moreover, the brain cholinergic system plays a role in the modulation of anxiety behaviors. Therefore, this study aimed to evaluate the role of dorsal hippocampal muscarinic cholinergic receptors of the CA1 area on anxiety induced by iron oxide nanoparticles in adult male rat...
Many types of fluorescent nanoparticles have been investigated as alternatives to conventional organic dyes in biochemistry; magnetic beads also have a long history of biological applications. In this work we apply flame spray pyrolysis in order to engineer a novel type of nanoparticle that has both luminescent and magnetic properties. The particles have magnetic cores of iron oxide doped with ...
Two iron-sulfur proteins from Bacillus polymyxa (ferredoxins I and II) have been shown to transfer 1 electron per 4 iron atoms at a potential of -380 and -420 mv, respectively, at pH 7. The proteins contain 4 iron and 4 labile sulfur atoms and 4 cysteine residues in molecules of about 9,000 daltons; electron paramagnetic resonance and optical properties suggest that each contains an iron-sulfur...
An active preparation of the membrane-associated methane monooxygenase (pMMO) from Methylococcus capsulatus Bath was isolated by ion-exchange and hydrophobic interaction chromatography using dodecyl beta-D-maltoside as the detergent. The active preparation consisted of three major polypeptides with molecular masses of 47,000, 27,000, and 25,000 Da. Two of the three polypeptides (those with mole...
Triton-fractionated photosystem-I particles poised at -625 mV, where the two bound iron-sulfur proteins are reduced, have been studied by optical and electron paramagnetic resonance spectroscopies from 293 to 5 K. At 5-9 K, these particles exhibit two decay components with lifetimes of 1.3 and 130 msec in the laser pulse-induced absorption and electron paramagnetic resonance signal changes. Spe...
Iron oxide is an important biological agent that has a key role in medical processes; however, the mechanism whereby it provides iron for human and animal cells and its biological uses remains unclear. We aimed to evaluate the effects of oral iron oxide on serum iron status and compare the results with those of iron sulfate as a reference salt. Fifteen adult rabbits were divided into 3 groups o...
different types of iron oxides deposits have been identified along the khaf – dorouneh volcanic and plutonic belt in north east of iran. kuh-e-zar is one of these ore deposits known as fe- oxide gold deposit. the main purpose of this paper is to detect and discriminate the iron oxide minerals in this area based on the etm+ data. data processing has been done by envi (environment for visualizing...
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