Singlet fission in TIPS-anthracene thin films.

Singlet fission is an exciton multiplication process that allows for the conversion of one singlet exciton into two triplet excitons. Organic semiconductors, such as acenes and their soluble bis(triisopropylsilylethynyl) (TIPS) substituted counterparts, have played a major role in elucidating the understanding of the underlying mechanisms of singlet fission. Despite this, one prominent member of the acene family that has received little experimental attention to date is TIPS-anthracene, even with computational studies suggesting potential high singlet fission yields in the solid state.

The effect of lifelong endurance exercise on cardiovascular structure and exercise function in women.

Key Points: The beneficial effects of sustained or lifelong (>25 years) endurance exercise on cardiovascular structure and exercise function have been largely established in men. The current findings indicate that committed (≥4 weekly exercise sessions) lifelong exercise results in substantial benefits in exercise capacity ( ), cardiovascular function at submaximal and maximal exercise, left ventricular mass and compliance, and blood volume compared to similarly aged or even younger (middle-age) untrained women. Endurance exercise training should be considered a key strategy to prevent cardiovascular disease with ageing in women as well as men.

A coloring-book approach to finding coordination sequences.

An elementary method is described for finding the coordination sequences for a tiling, based on coloring the underlying graph. The first application is to the two kinds of vertices (tetravalent and trivalent) in the Cairo (or dual-3.4.

Antineoplastic urinary protein inhibits Kaposi's sarcoma and angiogenesis in vitro and in vivo.

Kaposi's sarcoma (KS) is the most common tumor in human immunodeficiency virus infection and acquired immune deficiency syndrome. Recent clinical trials with human chorionic gonadotropin (hCG) prepared from early pregnancy urine have shown encouraging results in the resolution of KS lesions. A urinary protein with antitumor activity, ANUP (antineoplastic urinary protein), a dimer of 32 kD, has previously been shown to inhibit the growth of various tumor cell lines in vivo.