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The paper presents the results of metrological tests and measurements of dimensional accuracy of models manufactured using the photo-curing additive technology of POLYJET MATRIX - PJM. The material from which the samples were manufactured was a liquid polymer resin with the commercial name MED610, which is characterized by a high degree of biocompatibility, which increases the validity of the research in medical and dental applications. The key parameter considered was the location of digital CAD models in selected places of the virtual building platform and it influence of dimensional accuracy. The research results showed a clear impact of the arrangement of models on the building platform on the accuracy of the produced models, both in terms of external and internal diameters. [ABSTRACT FROM AUTHOR]

Reaction of 4-methoxy-3′-alkylthio-3,4′-diquinolinyl sulfides 1a-d with a nitrating mixture led to the title sulfoxides 2a-d , but the same treatment of isopropylthio derivative 1e resulted in S-dealkylation and oxidation with formation of 3,3′-diquinolinyl disulfide 3 . 3′-Alkylsulfinyl group promotes nucleophilic methoxy-desulfidation of 4′-quinolinyl sulfur bond in sulfoxides 2 , as compared to that in sulfides 1 , in which case it leads to 3-quinolinyl sulfoxides 6 and 3-quinolinethiolate 4-A . [ABSTRACT FROM AUTHOR]