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The hydrothermal reactions of α-K(4)SiW(12)O(40) with NiCl(2)·6H(2)O yielded two unprecedented silicotungstates containing a triangular inorganic Ni(6) core. Furthermore, Na(2)[Ni(6)(μ(3)-OH)(3)(H(2)O)(9)SiW(9)O(34)](2)·17H(2)O (1) presents a rare dimer, in which two SiW(9) units sandwich double Ni(6) cores by W-O-Ni linking instead of conventional Ni-O-Ni.
We prove that if G is a 3-connected plane graph of order p, maximum face length l and radius rad(G), then the bound rad(G) ≤ p 6 + 5l 6 + 2 3 holds. For constant l, our bound is shown to be asymptotically sharp and improves on a bound by Harant (1990) [6]. Furthermore we extend these results to 4and 5-connected planar graphs. © 2012 Published by Elsevier B.V.
For finite subsets A1, . . . , An of a field, their sumset is given by {a1+ · · ·+an : a1 ∈ A1, . . . , an ∈ An}. In this paper we study various restricted sumsets of A1, . . . , An with restrictions of the following forms: ai − aj 6∈ Sij , or αiai 6= αjaj , or ai + bi 6≡ aj + bj (mod mij). Furthermore, we gain an insight into relations among recent results on this area obtained in quite differ...
Background The onset of postoperative septic complications has recently been associated to serum levels of interleukin (IL) IL-6 and IL-10. Patients with complications have higher serum levels than patients without complication after surgery. IL-6 has been recognized as early marker of postoperative septic events. Furthermore IL-6 increases with age, expecially if there are associated diseases....
The synthesis and characterization of cationic ruthenium(II) complexes of the type [Ru(η(6)-p-cym)Cl{Ph(2)P(CH(2))(n)S(O)(x)Ph-κP,κS}][PF(6)] (n = 1-3; x = 0, 1; p-cym = p-cymene) are presented. Furthermore, their high biological potential even against cisplatin-resistant tumor cell lines and their structure-activity relationships are discussed.
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