AbstractCarcinogenic and mutagenic properties of aflatoxin species are known in literature. Their intake over a long time period might be health-dangerous for human even at trace levels. It is well known that different foodstuffs can be contaminated by aflatoxin species through growing and storage. Due to the serious health effects, sensitive determination of aflatoxin species in any matrices related with the human being is very crucial at trace levels. In literature, there are sensitive techniques to analyze the different samples for the contents of their aflatoxin species. Each technique has some advantages and disadvantages over the other techniques. This review aims to summarize the different health effects of aflatoxin species, development of analytical techniques and applications of developed techniques in a variety of matrices.
In this study, the mononuclear complexes of cadmium(II) and dinuclear complexes of uranyl(VI) with five vicdioximes have been obtained. Cadmium(II) forms, with ligands, complexes [(L x H)(Cl)(H 2 O)(Cd)] with x ¼ 1-5. Mononuclear complexes with a metal:ligand ratio of 1:1 were obtained for cadmium(II) with the ligands, and a chloride ion and a water molecule are also coordinated to the cadmium(II) ions. Uranyl(VI) complexes of these ligands are a dinuclear structure with l-hydroxo-bridges. Uranyl(VI) forms, with ligands, complexes [(L x H) 2 (OH) 2 (UO 2 ) 2 ] with x ¼ 1-5, which have a 2:2 metal:ligand ratio. The structures of the complexes were identified by elemental analysis, i.r., and 1 H-n.m.r. spectra, u.v.-vis. spectroscopy, magnetic susceptibility measurements, conductivity measurements and thermogravimetric analysis (t.g.a.).
In this study, the complexes of Co (II), Ni (II), Cu (II) and Zn (II) with
2-(E)-(4-aminophenylimino)methyl-4,6-dichlorophenol were prepared and
characterized by physical, spectral and analytical data. The metal: ligand
stoichiometric ratio is 1:2 in all the complexes. The results suggested that
the Schiff bases are coordinated to the metal ions through the phenolic
oxygens and azomethine nitrogen to give mononuclear complexes. Their
structures were elucidated on the basis of elemental analysis, IR, 1H and 13C
NMR spectra, UV-VIS, magnetic susceptibility measurements and
thermogravimetric analyses. Both the antibacterial and antifungal activities
and MIC values of compounds were reported. Among the tested compounds, the
most effective compound providing a MIC value of 64 ?g/mL is Zn(L)2 against
C. tropicalis and B. subtilis. The theoretically optimized geometries of
complexes have tetrahedral structures. The computed stretching frequencies of
C=N, C-O and N-H bonds were found to be in good agreement with experimental
data. All calculated frequencies fall within about 5% of the experimental
frequency regions.
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