A review of the literature on dental auxiliaries and their utilization in the dental workforce is presented, and their future role is examined in the light of broader issues relating to changing disease patterns and service delivery. Legislative factors, productivity, quality assurance and the potential scope for dental auxiliaries in both the public sector and private practice setting are disc...

Clothing textiles come under the category of other commodities pursuant to the Foods and Other Commodities Act. They require neither notification nor marketing authorisation which means that the public authorities do not have information about individual textile auxiliaries or dyes used. The working group "Health Assessment of Textile Auxiliaries and Dyes" within the working group "Textiles" of...

In recent years there has been considerable interest in the synthesis and separation of enantiomers of organic compounds especially because of their importance in the biochemistry and pharmaceutical industry. High-performance liquid Chromatography is a very useful method for the direct separation of enantiomers. However, about 30−40 years ago, commercially available chiral stationary phases wer...

Abstract Asymmetric crotylation has firmly earned a place among the set of valuable synthetic tools for stereoselective construction carbon skeletons. For long time field was heavily dominated by reagents bearing stoichiometric chiral auxiliaries, but now catalytic methods are gradually taking center stage, and area continues to develop rapidly. This account focuses primarily on preformed organ...

one of the problems encountered in ce separations of basic compounds is the adsorption of analytes onto the negatively charged capillary wall which could lead to poor repeatability of migration time and peak area. additionally, separation of enantiomers of chiral of basic drugs is commonly carried out in low ph buffer which contributes to strong ionic interaction of the cationic drug ions with ...

One-pot, four-component procedure for the synthesis of a small library of new chiral spiro- oxindolopyrrolidines with high regio-, diastereo- (>99:1 dr), and enantioselectivity (up to 80% ee) is described. In this process, the regio- and stereochemical 1,3-dipolar cycloaddition of azomethine ylides, which were generated insitu by the reaction of isatin derivatives and sarcosin,with optically ac...

Spencer (1991) and Sadler (1997) argue that there are two diierent phenomena that have been grouped together as`contracted auxiliaries'. On the one hand are the syllabic reduced auxiliaries that are unselective in what they attach to. On the other hand, there are nonsyllabic reduced auxiliaries that exhibit lexical idiosyncrasy, stem allomorphy, and word-internal phonological processes. Sadler ...

We describe a quantitative analysis of the complexation-induced inversion of a screw-sense preference based on a conformationally dynamic double-helix structure in a macrocycle. The macrocycle is composed of two twisting units (terephthalamide), which are spaced by two strands (1,3-bis(phenylethynyl)benzene), and is designed to generate a double-helix structure through twisting about a C2 axis ...