THE events of the past 2 yr since the initial controversial publication by Mangano et al. regarding the effect of aprotinin on renal failure and mortality have been of great interest to the anesthesiology community. In this issue of ANESTHESIOLOGY, Dietrich et al. test the hypothesis that any potential nephrotoxic effect of aprotinin (Bayer Healthcare Inc., Toronto, Ontario, Canada) is dose dep...

Boron (B) is a non-metal micronutrient which is essential for plants growth and development. Formation of boron complex with cell wall matrix and phenolic compounds is a definite influence of boron in physiological process. It has been suggested that B-toxicity and deficiency may induce excess production of reactive oxygen species thereby promote defense responses by antioxidant enzymes or non-...

given a non-abelian finite group $g$, let $pi(g)$ denote the set of prime divisors of the order of $g$ and denote by $z(g)$ the center of $g$. thetextit{ prime graph} of $g$ is the graph with vertex set $pi(g)$ where two distinct primes $p$ and $q$ are joined by an edge if and only if $g$ contains an element of order $pq$ and the textit{non-commuting graph} of $g$ is the graph with the vertex s...