Structures of Yadanziosides K, M, N, and O, New Quassinoid Glycosides fromBrucea javanica(L.) MERR

Enzymatic synthesis of glycosides: from natural O- and N-glycosides to rare C- and S-glycosides

Carbohydrate related enzymes, like glycosyltransferases and glycoside hydrolases, are nowadays more easily accessible and are thought to represent powerful and greener alternatives to conventional chemical glycosylation procedures. The knowledge of their corresponding mechanisms has already allowed the development of efficient biocatalysed syntheses of complex O-glycosides. These enzymes can al...

C O M P O N E N T I N T E G R at I O N F R a M E W O R K

An emerging trend in the engineering of complex systems is the use of component integration frameworks. Such a framework prescribes an architectural design that permits flexible composition of third-party components into applications. A good example is Sun Microsystems’ Enterprise JavaBeans (EJB) framework, which supports objectoriented, distributed, enterprise-level applications, such as accou...

State Dependent M/M/C/K/N Machining System with Mixed Spares and Removable Repairmen

$(m,n)$-algebraically compactness and $(m,n)$-pure injectivity

In this paper‎, ‎we introduce the notion of $(m,n)$-‎algebr‎aically compact modules as an analogue of algebraically‎ ‎compact modules and then we show that $(m,n)$-algebraically‎ ‎compactness‎ ‎and $(m,n)$-pure injectivity for modules coincide‎. ‎Moreover‎, ‎further characterizations of a‎ ‎$(m,n)$-pure injective module over a commutative ring are given‎.

A new O-terpenoidal coumarin from Clausena anisum-olens Merr.

A new O-terpenoidal coumarin 1, named hekumarone, was isolated from the leaves and twigs of Clausena anisum-olens Merr.(Rutaceae) collected in Hekou County in Yunnan Province, P.R. China. Structure elucidation and unambiguous NMR assignments for the title compound was carried out on the basis of 1D and 2D NMR experiments.