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Biomedical subjects

Robert M Riggs

Publications and source records attributed to Robert M Riggs.

2 recordsLinked to original sources

A quantitative assessment of a medicinal chemistry problem-based learning sequence.

OBJECTIVES: To establish an aggressive problem-based learning (PBL) format for the medicinal chemistry course and assess the outcomes of student learning. METHODS: To assess learning in the new format, precourse and postcourse examinations were given to students enrolled before and after problem-based learning was implemented, and appropriate statistical analyses were conducted. RESULTS: The PBL cohort did not learn the same amount of factual content yet performed the same on higher-order thought questions as the non-PBL cohort. CONCLUSIONS: Problem-based learning may not be the ideal method for teaching medicinal chemistry. This may be due to several factors including: student learning type, the lack of a cognitive framework for learning in the basic sciences, and time constraints.

Chemistry, Pharmaceutical↗

Synthesis and stability of two indomethacin prodrugs.

The purpose of this study was to synthesize and study the in vitro enzymatic and non-enzymatic hydrolysis of indomethacin-TEG ester and amide prodrugs. It was found that the ester conjugate 10 was comparatively stable between pH 3 and 6 (half-life>90h), with a half-life equal to 5.2h in 80% buffered plasma. In contrast, the amide conjugate 12 appeared to be stable over the entire pH range studied with the only observed degradation being cleavage of the indolic N-4-chlorobenzoyl moiety.

Anti-Inflammatory Agents, Non-Steroidal↗