منابع مشابه
Ross procedure at the crossroads.
The quest for a perfect heart valve substitute has been going on for half a century. In 1960, Lower et al1 described the feasibility of replacing the aortic valve of dogs with the native pulmonary valve. In 1967, Ross performed this procedure in humans.2 Ross transferred the pulmonary valve into the aortic root with the same technique used to implant aortic valve homograft3 (ie, the pulmonary s...
متن کاملPredator-prey Interactions between Eagles and Cackling Canada and Ross' Geese during Winter in California
-Cackling Geese (Brunta canadensis minima) were preyed on heavily in northeastern California by Golden Eagles (Aquila chysaetos) and less commonly by Bald Eagles (Haliaeetus Zeucocephalus) in 19851990. Eagle predation on Cackling Geese was minimal in other wintering locations in California. In the Klamath Basin, eagles killed Cackling Geese most frequently soon (<IO days) after the geese arrive...
متن کاملAt most at last
Recent pragmatic accounts derive the ignorance inferences to which superlative modifiers give rise as quantity implicatures in a neo-Gricean framework. While these approaches successfully account for the interaction of at least with modals, the behavior of at most remains a puzzle. I propose that at most is composed of an antonymizing operator and at least and show how this accounts for the int...
متن کاملMountain Village at Sunset.
During my travels to numerous countries over 40 years, I have seen many picturesque mountain villages with elegant and well-preserved houses perched on carefully selected sites on the mountains, and others located by a river or lake at the foot of a mountain. They appear remarkably harmonious with the natural scenery. Fruit trees or tea trees and crops such as rice, wheat, and corn are planted ...
متن کاملFree, at last!
Infectious diseases have moulded the development of the human species more than any other biological or abiological factor. They have influenced not only our biology, but also our history and political development; from the outcome of wars to the success of empires, and from the pace of technological advance to the structure of society itself. The introduction of smallpox to the Americas by Eur...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1961
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2213