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Приказ резултата 791-796 од 796
Fine tuning of dwelling time in friction stir welding for preventing material overheating, weld tensile strength increase and weld nugget size decrease
(VINCA Institute of Nuclear Sciences, 2016)
After successful welding, destructive testing into test samples from Al 2024-T351 friction stir butt welds showed that tensile strength of the weld improve along the joint line, while dimensions of the weld nugget decrease. ...
Economizer water-wall damages initiated by feedwater impurities
(Association of Chemical Engineers of Serbia, 2014)
The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of ...
Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool
(VINCA Institute of Nuclear Sciences, 2016)
The friction coefficient in many friction stir welding researches is generally used as an effective, constant value without concern on the adaptable and changeable nature of the friction during welding sequence. This is ...
Synthesis of endoperoxides by domino reactions of ketones and molecular oxygen
(Royal Soc Chemistry, Cambridge, 2015)
Domino reactions of ketones with molecular oxygen in the presence of potassium hydroxide and potassium t-butoxide afford cyclic hydroperoxy acetals (3,5-dihydroxy-1,2-dioxanes). Mixed endoperoxides can also be obtained in ...
Synthesis of vinyldihydropyran by cooperative catalysis
(Serbian Chemical Soc, Belgrade, 2016)
Delta(5)-Unsaturated aldehydes with a suitably positioned allylic halide, or phosphate, leaving group undergo doubly-catalyzed cyclization to give dihydropyran derivatives. The cyclization proceeds under the synergetic ...
Synthetic studies towards D-modified paclitaxel analogues / Sintetičke studije analoga paklitaksela sa modifikovanim D-prstenom
(Serbian Chemical Soc, Belgrade, 2012)
A synthetic sequence has been developed for the preparation of 9,10- di-O-diacetyl-4-desmethylene-4β-(3-butenyl)-4α-hydroxy-5-O-mesyltaxicin I- -1,2-carbonate 3, an intermediate in an attempted synthesis of a cyclobutane ...