A highly selective and sensitive enzymatic method for the quantitative determination of l-arginine (Arg) has been developed. The method is based on the use of recombinant bacterial arginine deiminase (ADI) isolated from the cells of a recombinant strain Escherichia coli and o-phthalaldehyde (OPA...

Knoop microhardness anisotropy on the cleavage plane (100) of single crystals of l-arginine hydrochloride monohydrate (LAHCl) and l-arginine hydrobromide monohydrate (LAHBr) is reported. The microhardness increases from to and then decreases to orientation. Calculation of Young’s modulus val...

L-arginine hydrochloride crystals have been grown using water and ethanol+water mixture as solvent. Growth of the anhydrous form of LAHCl has also been carried out. The grown crystals were subjected to powder X-ray diffraction studies. FTIR studies have been carried out to identify the functiona...

l-arginine hydrochloride (LAHCl) solutions of 1 M (A) and 2 M (B) concentrations have been investigated for optical nonlinearity under a continuous wave (CW) diode laser of wavelength 670 nm. Nonlinear absorption (β), nonlinear refraction (n2) and third-order nonlinear optical susceptibility (χ...

The volumetric, acoustic and viscometric properties are used for investigating the interactions of l-serine and l-arginine in aqueous solutions of a vitamin, namely, thiamine hydrochloride, over a temperature range of (293.15–313.15) K and at atmospheric pressure. The limiting apparent molar vo...

Limited availability of 229Th for clinical applications of 213Bi necessitates investigation of alternative production routes. In reactor production, 229Th is produced from neutron transmutation of 226Ra, 228Ra, 227Ac and 228Th. Irradiations of 226Ra, 228Ra, and 227Ac targets at the Oak Ridge Nat...

Thorium-229 is a valuable, but scarce, radionuclide for nuclear clock applications or targeted alpha therapy. While it is mostly produced by the decay of 233U, 229Th can also be produced by neutron irradiation of 226Ra. At SCK•CEN, capsules containing mainly 228Th (by-product of 226Ra irradiatio...

A new reference material was characterized for 229Th molality and thorium isotope amount ratios. This reference material is intended for use in nuclear forensic analyses as an isotope dilution mass spectrometry spike. The reference material value and expanded uncertainty (k = 2) for the 229Th mo...

The addition of selenate or selenite to common fertilizers for crop production could be an effective way of producing selenium-rich food and feed. However, this would be feasible only if the increase in plant selenium (Se) content did not negatively influence the uptake of other essential elemen...

We investigated the role of glutathione (GSH) and phytochelatins (PCs) on the detoxification of selenite using Arabidopsis thaliana. The wild-type (WT) of Arabidopsis thaliana and its mutants (glutathione deficient Cad 2–1 and phytochelatins deficient Cad 1–3) were separately exposed to varyin...

Intake of food containing high levels of selenium (Se) poses a safety risk to human health. Sulfur (S) fertilizer exerts different regulatory effects on Se uptake in crops. In this study, field experiments were conducted in 2012–2013 and 2013–2014 to clarify the effects of different S species ...

Selenite (Se (IV)) and selenate (Se (IV)) have recently been demonstrated to be equally effective in inhibiting mercury (Hg) phytotoxicity to plants. This assertion is still unclear. In this study, we aimed to explore the potential effects of Se species (Se4+ and Se6+) on the inhibition of the m...

In this study, MgAl2O4 (cLDHs) with a typical spinel structure was synthesized by calcination of Mg/Al layered double hydroxides (LDHs) and was used as adsorbent for selenite (IV) removal from contaminated groundwater. Based on XRD, SEM/TEM and XPS analysis, the layered structure of LDHs was com...

The sorption of selenite, SeO32−, by carbonate substituted hydroxylapatite was investigated using batch kinetic and equilibrium experiments. The carbonate substituted hydroxylapatite was prepared by a precipitation method and characterized by SEM, XRD, FT-IR, TGA, BET and solubility measurements...

Elevated arsenic and selenium concentrations in water cause health problems to both humans and wildlife. Natural and anthropogenic activities have caused contamination of these elements in waters worldwide, making the development of efficient cost-effective methods in their removal essential. In...

The sorption behavior of selenite onto the Tamusu clay from a preselected high-level radioactive waste disposal site in Inner Mongolia, China, was first investigated in simulated groundwater with high salinity by batch sorption experiments under aerobic/anaerobic conditions. The results demonstr...

The performances of button-type lithium cells based on Ag2SeO4 and Ag2TeO4 as cathodes have been determined in various organic electrolytes. These silver salts present relevant energetic properties and may be considered as interesting cathodic materials for application in primary lithium power s...

This article describes the natural and man-made sources of lithium, its health affects on humans and other living organisms, and the effects of mining and consumer-created pollution on the aquatic and terrestrial environment. Lithium is distributed widely in trace amounts in rocks and soils, as ...

The crystal structure of dilithium piperazinium(2+) selenate tetrahydrate has been solved; this substance crystallizes in the triclinic space group P1̄, a=7.931(2) Å, b=7.974(2) Å, c=7.991(2) Å, α=106.99(2)°, β=101.83(2)°, γ=119.28(2)° Z=1, R=0.0280 for 1489 observed reflections. A similar...

We studied an influence of uniaxial pressure on the triglycine selenate single crystals during simultaneous illumination by the continuous wave 532 laser at power about 300 mW. Simultaneously we have studied two-photon absorption for the nanosecond 1064 nm Nd:YAG laser fundamental wavelength. Th...