The paper examined the strength of rotationally welded joints between untreated beech dowels and samples thermally modified unmodified oak wood (used as substrates). results were compared with control group where glued using PVAc (polyvinyl acetate) glue for same types samples. Maximum dowel pull-out force was significantly higher connection to in both groups - treated wood. Welded joint group,...

Transesterification of (+/-)-menthol using propionic acid anhydride and Candida rugosa lipase was performed in chloroform and water at different pressures (1, 10, 50, and 100 bar) to study the pressure dependence of enantioselectivity E. As a result, E significantly decreased with increasing pressure from E = 55 (1 bar) to E = 47 (10 bar), E = 37 (50 bar), and E = 9 (100 bar). To rationalize th...

A new route to cationic complexes of Mg, Ca, Sr and Ba with 18-membered ring O4S2, O4Se2 and O2S4 donor macrocycles from metal acetonitrile complexes with weakly coordinating [BAr(F)](-) anions is described. The precursors used were [M(MeCN)x][BAr(F)]2 (M = Mg, x = 6; M = Ca, x = 8) and [M'(acacH)(MeCN)5][BAr(F)]2 (M' = Sr or Ba). Reaction of these with the heterocrowns, [18]aneO4S2 (1,4,10,13-...