Virginia Tech’s Participation in ASERL’s Cooperative Print Journal Retention Project
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Developing a Distributed Print Depository System
SUMMARY Barbara DesRosiers and Melissa Trevvett provided background information regarding their ongoing projects to develop print archives to preserve legacy materials and to serve as a backup to electronic journals. The presenters discussed projects currently underway and outlined the factors and issues to be considered when planning to form or join a print archive consortium. They also provided details about their current partnerships with JSTOR, Michigan State University, the University of Illinois, Urbana-Champaign, and Yale University including: the components of the projects, funding and staffing issues, and coordination and communication among the partners. The presenters stressed the importance of legal agreements among partners as a way to minimize risk and provide better management of the program.
New Sweet-Tasting C21-Pregnane Glycosides from Pericarps of Myriopteron extensum.
Ten novel C21 pregnane glycosides, extensumside C-L (1-10), were isolated as highly sweet-tasting substances from the edible pericarps of Myriopteron extensum (Wight) K. Schum by sensory-guided fractionation and purification. Their structures were determined through 1D and 2D NMR, such as HSQC, HMBC, 1H-1H COSY, HSQC-TOCSY, and ROESY, as well as other spectroscopic analysis combined with chemical evidence. These compounds shared the same aglycone, 3β,16α-dihydroxy-pregn-5-en-20-one, and contained the deoxysugar chain and the glucose chain which were linked to C-3 and C-16 of the aglycone, respectively. The sweetness potency was evaluated by a human sensory panel test and preliminary structure-taste relationship was discussed. The sweetness intensities of these compounds are between 50 and 400 times greater than that of sucrose. Furthermore, quantitation analyses of compounds 1, 3, 4, and 6 in different parts of M. extensum indicated that the concentrations of these sweet components in the pericarps are obviously higher than those in stems and roots.