Several new polymeric complexes of lead with dialkylamino derivatives of squaric acid were produced to study their coordination modes as possible prototypes for studies of lanthanide complexes.
Reaction of three different 1-(dialkylamino) derivatives of 3,4-dihydroxycyclobut-3-ene-1,2-dione (squaric acid) with lead(II) nitrate in aqueous solution yielded polymeric complexes which have been characterized by single-crystal X-ray analysis. Pb[(CH(3))(2)NC(4)O(3)](2)(OH(2))(2).H(2)O (1) produced from 1-(dimethylamino)-2-methoxycyclobutenedione crystallizes in the triclinic space group P&onemacr;, with
Lead (Pb) is an environmental pollutant extremely toxic to plants and other living organisms including humans. To assess Pb phytotoxicity, experiments focusing on germination of wheat seeds were germinated in a solution containing Pb (NO(3))(2) (0.05; 0.1; 0.5; 1g/L) during
Journal of magnetic resonance (San Diego, Calif. : 1997), 211(2), 195-206 (2011-06-28)
The acquisition and different appearances observed for wide bandwidth solid-state MAS NMR spectra of low-γ nuclei, using (14)N as an illustrative nucleus and employing two different commercial spectrometers (Varian, 14.1T and Bruker, 19.6T), have been compared/evaluated and optimized from an
Journal of hazardous materials, 213-214, 55-61 (2012-02-24)
An endophytic fungus was tested in rice (Oryza sativa L.) exposed to four levels of lead (Pb) stress (0, 50, 100 and 200 μM) to assess effects on plant growth, photosynthesis and antioxidant enzyme activity. Under Pb stress conditions, endophyte-infected
The hindering effects of metals and in particular lead (Pb) are representing a growing threat to aquatic organisms such as fish. This observation derives from toxic concentrations of Pb accounting for altered neurophysiological activities of some interesting teleost models like
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