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In organic chemistry, organocatalysis is a form of catalysis in which the rate of a chemical reaction is increased by an organic catalyst. This "organocatalyst" consists of carbon , hydrogen , sulfur and other nonmetal elements found in organic compounds.
Schreiner's thiourea, N,N'-bis3,5-bis(trifluormethyl)phenyl thiourea, combines all structural features for double H-bonding mediated organocatalysis: electron-poor; rigid structure; non-coordinating, electron withdrawing substituents in 3,4, and/or 5 position of a phenyl ring; the 3,5-bis(trifluoromethyl)phenyl-group is the preferred substituent
Segmental arterial mediolysis (SAM) is a rare disorder of the arteries characterized by the development of aneurysms, blood clots, narrowing of the arteries (stenoses), and blood collections (hematomas) in the affected distribution. [1] [2] SAM most commonly affects the arteries supplying the intestines and abdominal organs. [citation needed]
For the parent thiourea, the thione form predominates in aqueous solutions. [2] The thiol form, known as an isothiourea, can be encountered in substituted compounds such as isothiouronium salts. On the other hand, some compounds depicted as isothioureas and in fact thioureas, one example being mercaptobenzimidazole. [3]
Thiourea (/ ˌ θ aɪ. oʊ j ʊəˈr iː. ə,-ˈ jʊər i-/) [2] [3] [4] is an organosulfur compound with the formula SC(NH 2) 2 and the structure H 2 N−C(=S)−NH 2.It is structurally similar to urea (H 2 N−C(=O)−NH 2), except that the oxygen atom is replaced by a sulfur atom (as implied by the thio-prefix); however, the properties of urea and thiourea differ significantly.
The second procedure, a middle meningeal artery embolization, was aimed at minimizing the risk of future bleeding. "The procedure was successful. We managed to embolize that artery," Kalil said ...
It also facilitates a higher continuity of care, allowing nurses to maintain regular contact with patients, monitor their health status, and adjust their treatment plans for better overall health ...
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