‎let $r$ be a domain with quotiont field $k$‎, ‎and‎ ‎let $n$ be a submodule of an $r$-module $m$‎. ‎we say that $n$ is‎ ‎powerful (strongly primary) if $x,yin k$ and‎ ‎$xymsubseteq n$‎, ‎then $xin r$ or $yin r$ ($xmsubseteq n$‎ ‎or $y^nmsubseteq n$ for some $ngeq1$)‎. ‎we show that a submodule‎ ‎with either of these properties is comparable to every prime‎ ‎submodule of $m$‎, ‎also we show tha...

this case report describes an unusual spectrum of a proved anaphylactoid reaction to vancomycin during general anesthesia for release of tethered spinal cord in a 14 year old girl. bronchospasm which is the sine qua non of a classical anaphylactoid reaction was singularly absent in this particular case. our objective in this presentation is to highlight the importance of early recognition of th...