The development of actinide decorporation agents with high complexation affinity, tissue specificity, and low biological toxicity is vital importance for the sustained healthy nuclear energy. After accidental intake, sequestration by chelation therapy to reduce acute damage considered as most effective method. In this work, a series bis- tetra-phosphonated pyridine ligands have been designed, s...

Uranyl nitrate inhibited root growth of Allium cepa at > or = 25 microM concentration. Fluorimetric analysis of metal uptake indicated the entry and accumulation of uranium into the root cell. Uranyl nitrate was neither clastogenic nor aneugenic as it failed to induce micronuclei significantly, but between 25 and 100 microM concentration, it increased significantly the frequency of sister chrom...

The uranyl aryloxide, [UO(2)(OAr)(2)(THF)(2)], and uranyl chloride, [UO(2)Cl(2)(THF)(3)] or [UO(2)Cl(2)(THF)(2)](2) act as pre-catalysts for the ring opening polymerization of propylene oxide and cyclohexene oxide. Coordination of the monomers has been investigated using (1)H EXSY spectroscopy and kinetic and thermodynamic parameters reported. NMR analyses of the polymers suggest a bimetallic m...

background: this study was undertaken to examine the reversibility of renal injury in the male new zealand white rabbits sub­se­quent to a 90-days exposure to uranyl nitrate (un) in drinking water. animals were exposed for 90 days to uranyl ni­trate in their drinking water (24 or 500mg/l). control group were given municipal tap water. methods: the indicators of kidney function measured in this ...

To study the effect of EDTA on cell wall structure and the reversal of this effect by uranyl ion, thin sections of pea root tips were examined in the electron microscope. EDTA is known to facilitate separation of the cells in root tips. When sections of fixed and embedded EDTA-treated roots are floated on a uranyl-acetate solution, a loose network is revealed that would seem to be cellulose. In...

Allyl propionate-maleic anhydride-styren terpolymer has been modified with glycerin in order to prepare a new cross-linked functional polymer sorbent. The synthesized cross-linked polymer sorbent has a network structure and contains carboxylic acid, carbonyl, hydroxy, and ester groups, all of which are capable of interacting with metal ions. The sorption behavior of UO 2 ions under optimum sorp...

Single crystals of Cs2(UO2)(NO3)Cl3 were prepared by a hydrothermal method at 205 ◦C. The crystal structure has been solved by Direct Methods: monoclinic, P21/n, a = 10.3748(13), b = 9.4683(13), c = 12.5535(16) Å, β = 110.280(2)◦ , V = 1156.7(3) Å3, R1 = 0.029. In the structure, strongly bonded linear uranyl cations UO2 are equatorially coordinated by two O and three Cl atoms to form (UO2)Cl3O2...

An optimized and validated spectrophotometric method has been described for the quantitative analysis of uranyl ion in soil samples. The method is based on the chelation of uranyl ion with piroxicam to produce a yellow complex in 1,4-dioxan–water medium at room temperature which absorbs maximally at 390 nm. Beer’s law is obeyed in the concentration range of 6.75 × 10 – 9.45 × 10 μg mL with appa...

Ahstraet--Uranyl acetate solutions, ranging in concentration from about 100 ppm to 3700 ppm, were reacted with the Na-, K-, and Caforms of zeolite A. The crystalline products from the Naand K-A zeolites resembled compreignacite (K~O-6UO3' l lH~O) and from the Ca-A, becquerelite (CaO'6UO3. l lH~O). With higher concentrations of uranyl acetate, only X-ray-amorphous products were obtained. The com...

A three-dimensional model of the Escherichia coli 30 S ribosome has been derived from an extensive dark field electron microscopic investigation of unstained and unshadowed ribosomes. Subsequent studies of specimens lightly stained with uranyl acetate have added information on the location of regions that preferentially bind uranyl ions and may represent surface RNA. The model is an elongated c...