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An unusual case of an acquired coronary-to-bronchial artery communication is presented. Collateral flow to the lung was provided by the right coronary circulation following obstruction of pulmonary blood flow by chronic pulmonary emboli. A coronary steal phenomenon may have caused an exacerbation of cardiac symptoms by further reducing already compromised coronary blood flow in a patient with atherosclerotic coronary artery disease.

Catalysis is a surface phenomenon, making surface composition and structure a vitally important materials issue. The enormous progress made by analytical spectroscopies and microscopies in the last 20 years has had an impact that would be hard to overestimate. The situation can be viewed in four categories: things we can see routinely, things we will likely be able to see routinely upon completion of developments now underway, things we can see if promising science translates into reliable technology, and things where the way is not now clear. Taken together, these things lead to an agenda for research in characterization science as it relates to catalysis.