Synthesis of the α-primeveroside of methyl salicylate
Summary1. An anomer of a natural glucoside — monotropitoside — has been synthesized for the first time.2. This method is suitable for the synthesis of anomeric oligosides of phenols.
Zur Glucosidbildung aus 1‐Acyl‐glucosen
Die Darstellung von D-Glucosiden, vor allem der α-Reihe, wurde an weiteren 1-Acyl-D-glucosen untersucht. Einige kinetische Messungen wurden bei dieser Reaktion durchgefuhrt.
Dimensional Errors of Fixtures, Locating and Measurement Datum Features in the Stream of Variation Modeling in Machining
Machining processes are usually multi-station processes involving a large number of operations and several locating datum changes. Machining errors are thus introduced, transformed and accumulated as the workpiece is being machined. This paper introduces procedures for expressing the influence of errors in fixtures, locating datum features and measurement datum features on dimensional errors in machining. These procedures are essential in the derivation of the Stream of Variation model of dimensional machining errors using the CAD/CAPP parameters of the machining process. The linear state space form of the Stream of Variation model allows for advanced control theory achievements to be employed in formal solutions to problems in multi-station machining. Modeling procedures presented in this paper were experimentally verified in machining of an automotive cylinder head.