ABSTRACT
Social and political pressures are stimulating a rapid growth in environmental legislation and the framework of national and European directives is reviewed. The pressure for recycling and the incorporation of recycled material is at risk of conflict with safety for food contact packaging. Various recycling opportunities are reviewed, concluding that recycling must be directed only to where there is an environmental benefit; also that re-use must not jeopardize food safety. For direct food contact with foodstuffs, chemical recycling is the only confident way of ensuring product purity. Containment of recycled material behind a barrier layer leaves the question of barrier performance to undefined contaminants.
Subject(s)
Conservation of Natural Resources , Environmental Pollution/legislation & jurisprudence , Environmental Pollution/prevention & control , European Union , Refuse Disposal/legislation & jurisprudence , Equipment Reuse , Food TechnologySubject(s)
Blast Injuries/etiology , Carbonated Beverages , Eye Injuries/etiology , Glass , Humans , Polyethylene TerephthalatesABSTRACT
The condensation of per(trimethyl)silylbarbital and -phenobarbital with 1,2,3,4,6-penta-O-acetyl-beta-D-glucopyranose in the presence of stannic chloride in dichloroethane gave moderate yields of the beta-coupled barbiturate N-D-glucopyranosyl derivatives. Reaction of metharbital and mephobarbital under the same conditions was unsuccessful. The homologous N-methylglucosides were prepared by reaction of the barbital and phenobarbital N-glucosyl derivatives with diazomethane. The diastereomers of the phenobarbital and mephobarbital derivatives were resolved by use of C-18 reverse-phase h.p.l.c. 1H- and 13C-n.m.r. spectroscopy, and thermospray 1.c.-m.s. proved to be the most useful methods for characterizing the barbiturate glucosides.
