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In enzymology, an alpha,alpha-trehalose-phosphate synthase (UDP-forming) (EC 2.4.1.15) is an enzyme that catalyzes the chemical reaction UDP-glucose + D-glucose 6-phosphate ⇌ {\displaystyle \rightleftharpoons } UDP + alpha,alpha-trehalose 6-phosphate
However, the 231 Pa (with a half-life of 3.27 × 10 4 years) formed via (n,2n) reactions with 232 Th (yielding 231 Th that decays to 231 Pa), while not a transuranic waste, is a major contributor to the long-term radiotoxicity of spent nuclear fuel. While 231 Pa can in principle be converted back to 232
Protactinium-231 is the longest-lived isotope of protactinium, with a half-life of 32,760 years. In nature, it is found in trace amounts as part of the actinium series , which starts with the primordial isotope uranium-235 ; the equilibrium concentration in uranium ore is 46.55 231 Pa per million 235 U.
Protactinium-231 arises naturally from the decay of natural uranium-235, and artificially in nuclear reactors by the reaction 232 Th + n → 231 Th + 2n and the subsequent beta decay of 231 Th. It was once thought to be able to support a nuclear chain reaction, which could in principle be used to build nuclear weapons ; the physicist Walter ...
The question of US creditworthiness is set to again be up for debate beginning on Jan. 2 when, per a deal inked between President Joe Biden and then-House Speaker Kevin McCarthy, the debt ceiling ...
Chemical technologists and technicians (abbr. chem techs) are workers who provide technical support or services in chemical-related fields.They may work under direct supervision or may work independently, depending on their specific position and duties.
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