Tunichlorin, a blue-green pigment isolated from the Caribbean tunicate Trididemnum solidum, has been identified as nickel(II) 2-devinyl-2-hydroxymethylpyropheophorbide a by chemical and spectroscopic methods, with confirmation by partial synthesis of dimethyl tunichlorin from chlorophyll a. Nickel chlorins have been reported from geological sources but not from living organisms. Its occurrence ...

The title complex, [Cu(0.31)Ni(0.69)(C(5)H(7)O(2))(2)], was isolated from the reaction of bis-(N,N-dimethyamino-ethanol)copper(II) with bis-(acetyl-acetonato)nickel(II), which yielded crystals with mixed sites at the central metal position; the refined copper-nickel occupancy ratio is 0.31 (4):0.69 (4). Two acetyl-acetonate ligands, related by a centre of symmetry, are coordinated to the centra...

The asymmetric unit of the title compound, [Ni(H2O)6](C12H12BrN2O5S)2·H2O, contains a half hexa-aqua-nickel(II) complex cation with the NiII ion lying on an inversion center, one 5-bromo-7-[(2-hy-droxy-eth-yl)amino]-1-methyl-6-oxido-quinolin-1-ium-3-sulfonate (QAO) anion and a half lattice water mol-ecule on a twofold rotation axis. In the crystal, QAO anions are stacked in a column along the c...

Nickel allergy constitutes a serious health problem of modern societies. Hypersensitivity to this metal is found in 13% adults and 8% children. Risk factors for nickel allergy are: female gender and early exposure to nickel, e.g. piercing. Various mechanisms of inducing nickel allergy are possible, which is also reflected in the different clinical pictures. Nickel can induce allergic reaction i...

Introduction: Nickel is found in varies industrial processes such as electroplating, leather tanning, cement preservations, paints and pigments, textile, steel fabrication and canning industries. It is proved that Ni(II) has several health hazards such as carcinogenic. The aim of this study was the evaluation of Ni(II)adsorption on Apple peel granola from aqueous solution. Material and Methods:...

Lithium-ion batteries (LIBs) are widely used everywhere today, and their recycling is very important. This paper addresses the recovery of metals from NMC111 (LiNi1/3Mn1/3Co1/3O2) cathodic materials by leaching followed antisolvent precipitation. Ultrasound-assisted material was performed in 1.5 mol L−1 citric acid at 50 °C a solid-to-liquid ratio 20 g/L. Nickel(II), manganese(II) cobalt(II) we...

A gene encoding a homolog to the cation diffusion facilitator protein DmeF from Cupriavidus metallidurans has been identified in the genome of Rhizobium leguminosarum UPM791. The R. leguminosarum dmeF gene is located downstream of an open reading frame (designated dmeR) encoding a protein homologous to the nickel- and cobalt-responsive transcriptional regulator RcnR from Escherichia coli. Analy...

the mode of coordination of8 manganese(fi), cobaltm, nickel(h), copper(ii), zinc(h), lead(ii) and cadmium(i1) to sodium ascorbate (nahasc) was investigated using ir, uv-visible, aas, elemental microanalyzer, conductivity, magnetic and 'm and i3c nmr spectroscopic studies, nanasc is bidentate and coordination was through the carbonyl group and the oxygen atom of carbon-2 enolic hydfoxyl gro...

A series of complexes of formula TpNiX, where Tp*- = hydrotris(3,5-dimethylpyrazole)borate and X = Cl, Br, I, has been characterized by electronic absorption spectroscopy in the visible and near-infrared (NIR) region and by high-frequency and -field electron paramagnetic resonance (HFEPR) spectroscopy. The crystal structure of TpNiCl has been previously reported; that for TpNiBr is given here: ...