34929-03-8Relevant academic research and scientific papers
The evaluation method of destruction of structure
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, (2007/10/09)
PROBLEM TO BE SOLVED: To provide a critical Weibull stress diagram for enabling the evaluations of brittle fractures including the case of the absence of initial cracks through the use of Charpy impact values generally in use at present and provide an appropriate structure destruction evaluating method based on such evaluations. ?SOLUTION: The structure destruction evaluating method includes: (i) the previous grasp of the relation between critical Weibull stress and Charpy impact values on brittle materials (S4); (ii) the determination, on a structure to be designed, of the relation between generated Weibull stress generated in materials used for the structure, one of the brittle materials, and design parameters of the structure (S1-S3); and (iii) the determination of the relation between Charpy impact values characteristic to the materials used and the design parameters of the structure on the basis of the two relations in such a way that the generated Weibull stress may not exceed the critical Weibull stress (S5 and S6). ?COPYRIGHT: (C)2009,JPOandINPIT ?
Copper-mediated N-arylation of quinazolinediones
Guy, Collette S.,Jones, Teyrnon C.
experimental part, p. 2253 - 2256 (2009/12/24)
A mild, ligand-free method of arylating 2,4-quinazolinediones using arylboronates in the presence of copper salts is described. The reaction is tolerant of a variety of functional groups and works for arylboronic acid, arylboronic ester, and aryltrifluoro
