The synthesis and characterization of two new tetronic acid zinc (II) complexes of the empirical formulae [Zn(L-H)(2)(H(2)O)(2)] (1) and [Zn(L-H)(2)(H(2)O)(MeOH)]H(2)O (2) found within the same crystal are reported. The zinc ions bind through alkoxide and carbonyl groups of the ligand 3-methoxycarbonyl-5-phenyl tetronic acid (LH) as indicated by (1)H NMR and X-ray crystallographic studies. Thes...

A new polyoxovanadate [Zn2(dien)3][[Zn(dien)]2As4V16O42(H2O)] x 3H2O (1, dien = diethylenetriamine) has been hydrothermally synthesized and structurally characterized by EA, IR, TGA, magnetic measurement and single crystal X-ray diffraction. X-Ray diffraction analyses reveal that 1 exhibits the first [As4V16O42(H2O)]-containing polyoxometalate. In 1, the adjacent [As4V16O42(H2O)] clusters are l...

Photoreaction of zinc methyl 20-substituted meso(pyro)pheophorbide-a prepared by modifying naturally occurring chlorophyll-a in the presence of oxygen molecules gave its C19-C20 oxidative cleavage (1-carbonyl-19-oxo-bilatrienes) as the major products and the regioisomeric C1-C20 cleavage (19-carbonyl-1-oxo-bilatrienes) as the minor products. The resulting zinc complexes of linear tetrapyrroles ...

A method for the simultaneous spectrophotometric determination of cadmium, copper and zinc based on the formation of their complexes with 1,5-bis(di-2-pyridylmethylene)thiocarbonohydrazide is proposed. The absorption curves of these complexes overlap severely in the scanning range 380-480 nm. The analyte concentrations are calculated by a least squares fit of the pure spectra to the mixture spe...

The aim of the presented study was an estimation of the zinc bioavailability derived from amino acid complexes with methionine, lysine and glycine in growing lambs. 48 lambs, Polish Merino × Romanowski × Charolaise crossbreed, at age about 10 weeks and average body weight of 20 kg were randomly divided into 4 experimental groups. Animals were kept collectively and fed with concentrate and hay i...

The zinc-responsive Zap1 transcription factor of Saccharomyces cerevisiae controls many genes involved in zinc homeostasis. Zap1 has two activation domains, AD1 and AD2, which are independently regulated by zinc. While AD1 can fully activate most Zap1 target genes, AD2 is active only on a subset of those genes. One hypothesis explaining this promoter specificity was that AD1 and AD2 recruit dif...

Cyclic arrays consisting of six zinc-porphyrin units are constructed by the supramolecular self-assembly of a dehydrobenzo[12]-annulene derivative having three zinc porphyrin units at the liquid/graphite interface. Binding with C60 furnishes cyclic hexameric arrays of the complexes on the surface.

2:1 adducts involving [Zn(dtc) 2 ] 2 (dtc= pipdtc-, H 10 C 5 NCS2 ; dnpdtc-, (H 3 CCH 2 CH 2 ) 2 NCS2 ; dedtc, (H 5 C 2 ) 2 NCS2 ; dmdtc-, (H 3 C) 2 NCS2 ; nmedtc-, HOCH 2 CH 2 (CH) 3 NCS2 ; deadtc-, (HOCH 2 CH 2 ) 2 NCS2 ) and 4,4' – bipyridine were prepared and characterized by elemental analyses, IR, UV-Visible, Cyclic voltammetric and thermal studies. IR spectra of the complexes show the re...

The new ligand HMeATSM, derived from condensation of 2-3-butanedione with 4-methyl-3-thiosemicarbazide and 2,4-dimethyl-3-thiosemicarbazide, has been synthesized. Its reactivity nickel(II) zinc(II) nitrates was explored the resulting complexes were thoroughly characterized by elemental analysis, conductivity, mass spectrometry, IR, 1H 13C NMR spectroscopies their structures confirmed single-cry...

We use techniques of logic-based relational machine learning to automatically detect spatial patterns common to 21 previously described examples of zinc finger DNA complexes. We demonstrate that such patterns can be found and thus the proposed methodology may potentially serve to achieve better understanding of zinc finger DNA binding. Keywords— Structural Genomics, Machine Learning, Data