منابع مشابه
Biologic valves. Their performance and prospects.
deeply conscious of the honor you have bestowed upon me as a surgeon in asking me to give this lecture. Although modesty is not a quality with which surgeons are generally overendowed, I would like to accept it as a tribute to my colleagues both medical and surgical who work with me at Guy's and National Heart Hospitals in London. In fact, teamwork is the feature which has characterized modern ...
متن کاملUrethral Valves
Introduction Posterior urethral valves (PUVs) are a rare malformation in the subcollicular region of the male urethra. They cause varying obstructions of the lower urinary tract. The resulting secondary pathological conditions extend from mild—in part, clinically unmanifested—urinary dysfunctions to severe, bilateral changes in the upper urinary tract and associated renal failure. The literatur...
متن کامل2 Biologic
In this paper we explore the boundary between biology and the study of formal systems (logic).
متن کاملElectronic Expansion Valves Electronic Expansion Valves Fitters Notes ( Part 8 )
Stephan Bachmann, Danfoss Refrigeration & Air Conditioning, Offenbach Lately we have received a lot of customer questions about using electronic expansion valves, so the eighth instalment of Fitters Notes is entirely dedicated to this topic. Optimal evaporator filling (even with large load variations), flexible MOP points, and using the highest possible evaporating temperature in order to incre...
متن کامل‘Flapping valves’ in brachiopods
M. J. S. Rudwick and others postulate ‘rhythmic-flow’ feeding for the Permian richthofeniacean bi-achiopods, whereas R. E. Grant claims that they fed by normal ciliary action. Suspension-feeding has two components, current generation and food capture; normal brachiopod lophophores d o both, but this is neither universal nor compulsory among animals. Opening and closing the richthofeniid shell g...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Circulation
سال: 1972
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.45.6.1259