A Review of: "Annual Surveys: Si,Sb,Bi,Mn,Tc,Re, Heteronuclear complexes. R B King and J P Oliver (Eds) Elsevier Amsterdam, 1985, 577pp. ISBN 0-444-42512-2,US $ 166. 75/DFl 450.00" The use of heteronuclear filters enables the editing of complex1H nuclear magnetic resonance (NMR)...
Controlling the values of natural frequencies of a structure plays an important role to keep the dynamic behavior of structures in a desirable level. This paper is concerned with the optimal design of large-scale dome structures with multiple natural frequency constraints. This optimization problem is...
4'-methyl-3'-methylbenzyl)-5, 8-diacetoxy-1, 4- naphthoquinone of formula I is dehydrated with phosphorus pentoxide, thionyl chloride or the like to give a mixture of 2-(1'-acetoxy-4'-methyl-3'-pentenyl)- 5,8-diacetoxy-1,4-naphthoquinone of formula II and a compound of formula ...