Calorimetric, magnetic and X-ray diffraction measurements have been used to study the magnetic susceptibility and thermal stability of Co80ErxB20−x with (0 ⩽ x ⩽ 4) amorphous ribbons. The compounds are found to crystallize in Co2B and β-Co, after precipitation of the tetragonal Co3B phase. The ...

We obtained the amorphous dysprosium titanate nanopowders by the means of mechanochemical synthesis using a low-temperature modification of titania and dysprosium oxide as raw materials.TEM, SAED, XRD and Raman spectroscopy data show that complete transformation of initial oxides into X-ray amor...

The specific heat, thermal expansion and magnetic properties of polycrystalline sample of nonstoichiometric dysprosium boride DyB50, that was synthesized by boron-thermal reduction of the metal from its oxide in vacuum, were studied at 2–300 K. The measurements revealed a heat capacity and magn...

ZusammenfassungSchwerlösliche Verbindungen der Äthylenditiondiessigsäure mit Kupfer(II), Quecksilber(II) und Silber(I) wurden untersucht. Mit Hilfe von elektrochemischen, gravimetrischen und i.r.-spektrometrischen Methoden bestimmte man die Zusammensetzung, stoechiometrische Formeln und die Lösl...

The reaction chemistry of the monomeric organo-copper(I) species {[Ti](CCR1)2}CuR {[Ti]=(η5-C5H4SiMe3)2Ti; R1=SiMe3: 1a, R=CH3; 1b, R=C6H5; 1c, R=C6H4OMe-4; 1d, R=CCtBu; 1e, R=CCSiMe3; R1=tBu: 8a, R=CCSiMe3; 8b, R=CH3} towards different inorganic and organic reagents is described.On tre...

Copper is the only element in the 3d series from which no dicyclopentadienyl compounds are known to date. Starting from cyclopentadienyllithium and copper(I) chloride, two novel organocuprates, [PPh4][CuCp2] (1) and [Li(12-crown-4)2][Cu2Cp3] · 2THF (2), were prepared. The solid-state structural...

Oxytocin may play a role in mood regulation. Research has shown the plasma oxytocin level of patients with bipolar I disorder (BD I) during a manic episode was significantly higher than that of BD I patients of other statuses, and also that of healthy subjects. However, whether or not a differen...

The synthesis of heterobimetallic titanium(IV)–copper(I) complexes of type {[Ti](CCSiMe3)2}CuR {3a, R=iC3H7; 3b, R=nC4H9; 3c, R=cC5H9; 3d, R=9-C13H9; 5a, R=1-C10H7; 5b, R=9-C14H9; [Ti]=(η5-C5H4SiMe3)2Ti} in which monomeric low-valent copper(I) organyls (CuR) are stabilised by the chelating e...

The reaction of [Pt](CCPh)2 (1) {[Pt]=(bipy)Pt; bipy=2,2′-bipyridyl} with [CuX]n (2a, X=Cl; 2b, X=Br) produces the heterodinuclear platinum(II)copper(I) complexes of structural type {[Pt](CCPh)2}CuX (3a, X=Cl; 3b, X=Br) in high yields. The result of the X-ray structure analysis of 1 and 3...

ObjectivesEvidence of the relationship between neurometabolic changes in the cortico-striato-cerebellar (CSC) circuit and bipolar disorder (BD) is still limited. To elucidate the pathogenesis of BD, we investigated the underlying neurometabolic changes and their effect on CSC lateralization circ...

A novel SERS-based molecular sensor for detection and quantification of copper(II) ions with very good specificity and selectivity is reported in this work. The sensing is enabled by the employment of a synthesized dipicolylamine-based ligand anchored onto plasmonic gold nanoparticles through th...

The reaction of Fe(CO)5 with 1-alkoxy-4-alkyl-cyclohexa-1,3-dienes, in which the alkyl substituent is a sterically demanding group such as isopropyl or tert-butyl, has been studied. An unprecedented rearrangement of the 1,3-diene was found to take place during the reaction to give a mixture of F...

Premature deterioration of concrete foundations has been reported for a large number of homes in Eastern Connecticut of the United States. The characteristic symptoms are map cracking, whitish deposits at the vicinity of the cracking surface and wide crack opening. It is hypothesized that the vo...

This study investigated nutrient removal kinetics and main influencing factors of natural pyrrhotite autotrophic denitrification (PAD), and nutrient removal performance and the microbial community in the PAD biofilter (PADB). Results demonstrated that both NO3− and PO43− in wastewater were nearl...

In the Strathcona Mill, the rejection of pyrrhotite (Fe(1-x)S, 0

The detection of pyrrhotite (Fe7S8) by 57Fe NMR spectroscopy in zero applied field is reported. The 57Fe signal of pyrrhotite is detected in zero field using two different methods, with both yielding peak signal at 42.03 MHz. The technique and theory of 57Fe NMR spectroscopy of ferromagnetic iro...

The objectives of the study are to detect the behavior of pyrrhotite oxidation and to determine the effect of acid activators on the flotation of oxidized pyrrhotite. The results showed that the floatability of oxidized pyrrhotite decreased significantly with the increase of oxidation time. The ...

In froth flotation, separation between the valuable and the gangue minerals comes as a result of the attachment of hydrophobic particles to air bubbles. Considering the importance of bubble formation and bubble-particle attachment, it is evident that the pulp phase facilitates the events for the...

The use of pyrrhotite-containing aggregate in concrete has led to the premature deterioration of building foundations in Connecticut (U.S.A.). Pyrrhotite is a highly reactive iron-sulfide mineral that can initiate internal sulfate attack in concrete structures, because it serves as a source of s...

This paper is a continuation of a lab–scale flotation scoping study completed on a Ni–Cu sulfide ore that incorporated the use of diethylenetriamine/sodium metabisulfite (DETA/SMBS) pyrrhotite depressants. The scoping test work showed depressive effects on both hexagonal (Hex Po; Fe9S10) and m...