نتایج جستجو برای: tetramethyl thiourea
تعداد نتایج: 4454 فیلتر نتایج به سال:
3-(Dodecanethiyl)-4-(hydroxymethyl)-2,2,5,5-tetramethyl-1-pyrrolinoxyl (5) effectively disperses biofilms of relevance to cultural materials while preventing their formation.
The lateral diffusion constants of two water insoluble redox surfactants, 4-alkaneamide derivatives of 2,2,6,6-tetramethyl-1-piperidynyloxy r a e
Thiourea-based iminophosphorane (BIMP) organocatalysts featuring SPhos- or BIDIME phosphine units have been developed and successfully applied in the asymmetric addition of nitromethane to N-Boc-protected trifluoromethyl aryl ketimines. α-Trifluoromethyl β-nitroamines were obtained 40–82% isolated yields 80–95% enantioselectivities. A careful evaluation catalytic activity BIMPs indicates that c...
Electrorefining is the process of choice to purify several metals, among which copper. A crucial parameter in electrorefining, and electroplating general, additive activity. Several additives are introduced electrolyte ensure a morphological smooth copper deposit. Thiourea but complex used it known degenerate both reaction product as thiourea itself can with ions. Unfortunately, time dependent ...
Effective microchip extraction of deoxyribonucleic acid (DNA) from crude biological matrixes has been demonstrated using silica beads or hybrid phases composed of beads and sol-gel. However, the use of monolithic sol-gels alone for extraction of human genomic DNA has been more difficult to define. Here we describe, for the first time, the successful use of monolithic tetramethyl orthosilicate-b...
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