نتایج جستجو برای: uranyl nitrate
تعداد نتایج: 34757 فیلتر نتایج به سال:
Alleman, Lee A. M.S., Purdue University, August 2016. A Dose Distribution Study of Uranyl Nitrate in Zebrafish using Liquid Scintillation and Passivated Implanted Planar Silicon Detectors. Major Professor: Linda H. Nie. Standard curves for a Perkin Elmer TriCarb 2800 liquid scintillation detector (LSC) and a Ludlum 3030p Passivated Implanted Planar Silicon detector have been developed and utili...
Chromium and uranium are highly toxic metals that contaminate many natural environments. We investigated their mechanisms of toxicity under anaerobic conditions using nitrate-reducing Pseudomonas stutzeri RCH2, which was originally isolated from a chromium-contaminated aquifer. A random barcode transposon site sequencing library of RCH2 was grown in the presence of the chromate oxyanion (Cr[VI]...
This study investigated the partitioning of uranyl within a quaternary system made up of uranyl, citrate, goethite, and the bacterium Pseudomonas fluorescens. In the absence of cells, uranyl was sorbed to goethite as a complex involving surface groups and/or citrate. Measurements of the evolution of CO2 indicated that the addition of bacterial cells lead to the gradual biodegradation of citrate...
DNAzymes are known to bind metal ions specifically to carry out catalytic functions. Despite many studies since DNAzymes were discovered nearly two decades ago, the metal-binding sites in DNAzymes are not fully understood. Herein, we adopt uranyl photocleavage to probe specific uranyl-binding sites in the 39E DNAzyme with catalytically relevant concentrations of uranyl. The results indicate tha...
Four uranyl methylenediphosphonates have been synthesized from reactions of uranyl nitrate and methylenediphosphonate in water. Three of the compounds, (1) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 2 H(2)O, (2) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 4 H(2)O, and (3) (UO(2))[O(3)PCH(2)PO(3)H](H(2)O) x 3 H(2)O x NH(4), have been synthesized under ambient conditions whereas compound 4, (UO(2))[CH(2)(PO(3)H)(...
The crystal structure of bergenite, ideally Ca2Ba4[(UO2)3O2(PO4)2]3(H2O)16, monoclinic, space group P21/c, a 10.092(1), b 17.245(2), c 17.355(2) Å, 113.678(2)°, V 2766.2(3) Å3, Z = 2, Dcalc 4.82 g/cm3, was solved by direct methods and refined by full-matrix least-squares techniques on the basis of F2 to agreement indices R1 of 5.0% calculated for 4118 unique observed reflections (|Fo| ≥ 4 F), a...
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