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Donor-acceptor substituted quinonoid molecules have been investigated very little in connection with nonlinear optical (NLO) applications. We present a theoretical analysis of the hyperpolarizability, p, of a model pushpull quinonoid molecule as a function of the quinonoid-benzenoid character (QBC). B is found to be quite large at all geometries except the quinonoid extreme; it results from appreciable contributions from a large number of excited states.

Large pleural effusion has a potential to cause adverse impact on the cardiovascular hemodynamics, which could manifest as tamponade physiology. Altered cardiac hemodynamics could be an important contributor in the mechanism of dyspnea in patients with large pleural effusion.

A solitary metastasis to the nose from a renal cell carcinoma is extremely rare. One such case is presented and the argument for aggressive therapy to these lesions is reviewed.