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If the catalyst and reaction conditions are indicative of low effectiveness, selective poisoning may be observed, where poisoning of only a small fraction of the catalyst's surface gives a disproportionately large drop in activity. [4] If η is the effectiveness factor of the poisoned surface and h p is the Thiele modulus for the poisoned case:
Arctic Cat is an American brand of snowmobiles and all-terrain vehicles manufactured in Thief River Falls, Minnesota. The company was formed in 1960 and is now part of Textron Inc. Arctic Cat designs, engineers, manufactures, and markets all-terrain vehicles , snowmobiles and related parts, garments (such as snowmobile suits ), and accessories.
The Catalyst, an ancient AI that serves as the architect and overseer of the Reapers (the antagonists of Mass Effect). Also known as the Intelligence to its creators, the Leviathans, it was originally created to oversee relationships between organic and synthetic life as a whole, but came to realize that so long as they remained separate ...
And as of Jan. 17, Solana just got a massive new catalyst that could make its lead even more decisive. Start Your Mornings Smarter! Wake up with Breakfast news in your inbox every market day.
The greatest Arctic declines are in the winter and spring, reaching up to 30 percent when the stratosphere is coldest. [26] Reactions that take place on polar stratospheric clouds (PSCs) play an important role in enhancing ozone depletion. [27] PSCs form more readily in the extreme cold of the Arctic and Antarctic stratosphere.
The Energy Catalyzer (also called E-Cat) is a claimed cold fusion reactor [1] [2] devised by inventor Andrea Rossi [3] with support from the late physicist Sergio Focardi. [4] [5] An Italian patent, which received a formal but not a technical examination, describes the apparatus as a "process and equipment to obtain exothermal reactions, in particular from nickel and hydrogen". [6]
A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, [2] even endangering or destroying modern civilization. [3] An event that could cause human extinction or permanently and drastically curtail humanity's existence or potential is known as an " existential risk ".
The structure of tributyltin oxide: the most common TBT compound used in marine paint Biofouling on the hull of a boat. Tributyltin (TBT) is an umbrella term for a class of organotin compounds which contain the (C 4 H 9) 3 Sn group, with a prominent example being tributyltin oxide. [1]