Engineering of chitosan by praseodymium has been investigated to improve the adsorption properties as well as physical characteristics of chitosan. Modification of chitosan changes the original properties of chitosan so that it can be more suitable for adsorption of fluoride ions. In this study,...

In the present work, a novel optical chemical sensor (optode) was prepared based on impregnation of N, Ń-bis (salicylidene)-1, 3-ethylenediamine (BESA) Schiff base into mesoprous SBA-15 paste for determination of trace amounts of Praseodymium (Pr) ion by UV/Vis spectrophotometry. The sensor was ...

Spectroscopic properties of Pr(III) complexes with diethyl(phthalimidomethyl)phosphonate (DPIP) and diethyl(2-oxo-2phenylethyl)phosphonate (DEPP) ligands were studied using absorption and luminescence spectroscopy. Absorption spectra of praseodymium nitrate hexahydrate complexes with phosphonate...

A single i.v. dose (5 mg/kg) of a light lanthanon, praseodymium, prolonged the duration of hexobarbital-induced sleep and zoxazolamine-induced paralysis, as well as it modified pharmacokinetic parameters of hexobarbital and zoxazolamine, in rats. Half-lives (t12) and area under the curve (AUC) w...

A novel rare-earth metal(III) saccharinate, namely bis(o-sulfobenzimidato)praseodymium(III) chloride hexahydrate, is synthesized and its solid-state structure is suggested from the FT IR and UV/vis spectroscopic, thermoanalytical, elemental and magnetic measurements. The OH, CO, SO2 and OD stret...

Absorption, emission and excitation spectra of anhydrous and hydrated praseodymium and cerium chlorides were investigated in nonaqueous solvents (CH3OH and iso-C3H7OH). The role of steric effect and solvation of salts on the intensities and energies of f–d and f–f transitions were analyzed. Th...

Polyaniline (PANI) has been synthesized and doped with praseodymium (III) chloride (PrCl3). The DC conductivity has been measured by varying the amount of dopant in PANI in the temperature range 300–400 K. The conductivity results show that the conductivity is through the hopping process due to...

The electrochemical behaviour of praseodymium was studied in two molten chlorides with different oxoacidity properties, the eutectic LiCl–KCl and the equimolar CaCl2–NaCl melt at different temperatures. It has been found that Pr(III) is the only stable oxidation state in both molten chlorides,...

A novel spectroscopic furnace has been developed for the in situ acquisition of UV-visible absorption spectra in high temperature molten salts. The furnace has been used to obtain spectra of neodymium(III) and praseodymium(III) trichloride in LiCl-KCl eutectic at 450°C over various Ln(III) conc...

In this article, an effort was made to explore the properties of praseodymium-substituted barium orthoferrites with a better performance in absorption of microwaves. Orthoferrites with BaPrxFe2−xO4 (0 ≤ x ≤ 0.1) were prepared using an ultrasound-assisted sonochemical reactor. In this study, ul...

The reactions of Pr2O3 and Pr6O11 with Cl2(g) were studied thermodynamically and experimentally, and proposed in the systems Pr2O3/Cl2(g) and Pr6O11/Cl2(g). A kinetic analysis was performed on Pr6O11 chlorination, which differs from with other light rare earth oxide chlorinations. The praseodymi...

In the present work, we have synthesized praseodymium(III) chloride, PrCl3, from the praseodymium oxide, Pr6O11, by dry method in the presence of ammonium chloride, NH4Cl. This study includes the establishment of an assembly synthesis under inert gas. The thermal decomposing process of pure NH4C...

2′–5′ are second in importance only to 3′–5′ nucleic acids. They have attracted special attention in recent years because of their potential use in the design and synthesis of antisense oligomers. We have now obtained the crystal structure of adenylyl 2′–5′ adenosine trihydrate (A2′p5′...

In this study a bioinspired approach to induce self-mineralization of bone-like material on alumina surfaces is presented. The mineralizing enzyme alkaline phosphatase (ALP) is covalently immobilized by a carbodiimide-mediated chemoligation method. The enzymatic activity of immobilized ALP and i...

Carboxylic acids are known inhibitors of kidney stone formation. Eight acids with distinct spacing of carboxyl functional groups are shown to inhibit calcium oxalate monohydrate (COM) pre-critical nuclei, so that calcium oxalate trihydrate (COT) precipitation occurs. Increased acid concentration...

Three series of phosphate glasses were produced by melting together sodium phosphate salt (NaH2PO4) and the phosphate salts of either calcium (CaHPO4), magnesium (MgHPO4 · 3H2O) or iron (FePO4 · 2H2O) in a 5% gold/95% platinum crucible at 1200 °C. The glass compositions were confirmed by EDX ...

Experimental results about nucleating abilities of some sodium-hydrogenophosphates hydrates are presented. An analysis of structural compatibilities of different nucleating agents is reviewed. A critical examination leads to some new orientations such as studying multicomponents systems in the c...

In vitro studies using avian hepatocytes or human liver microsomes suggest that hydroxylation is an important pathway in the metabolism of triphenyl phosphate (TPHP), a chemical used as a flame retardant and plasticizer. TPHP metabolism can lead to the formation of para(p)- and meta(m)-hydroxyl-...

A method based on experimental and in silico evaluations for investigating interactions of organic phosphates and phosphonates with hydroxyapatite was developed. This quick and easy method is used for determination of differences among organophosphorus compounds of various structures in their mi...

Hyperphosphatemia is one of the main risk factors contributing to morbidity and mortality in patients with end stage renal disease. The demand for a new phosphate binder is continuously increasing since the number of patients suffering under hyperphosphatemia is growing. However, side effects an...