A new steroidal saponin was isolated from the leaves of Agave shrevei Gentry. Its structure was established as 26-(beta-D-glucopyranosyloxy)-22-methoxy-3-(O-beta-D-glucopyranosyl-(1-->2)O-[O-beta-D-glucopyranosyl-(1-->4)-O-[O-beta-D-glucopyranosyl-(1-->6)]-O-beta-D-glucopyranosyl(1-->4)-beta-D-galactopyranosyl]oxy)-(3beta,5alpha,25R)-furostane. The structural identification was performed using ...

The laboratory results from the mummy of a 25–35-year-old adult male (“Moses”/Q.445-2012) dating from the Middle Coptic period (AD 4th to 8th century) are reported. This individual was recovered from the Coptic necropolis of Qarara in Middle Egypt during the joint excavation performed by the Eberhard Karls Universität, Tübingen (Germany) and the Egyptian Museum of Barcelona in March 2012. Speci...

In the 20th century, many great mathematicians were attracted by this conjecture. In 1900, D. Hilbert gave a famous speech in an international mathematical conference, in which he proposed 23 problems to mathematicians. The Goldbach conjecture is a part of his 8th problem and the other part is the Riemann hypothesis. G. H. Hardy said that the Goldbach conjecture is one of the most difficult pro...

Abstract As a continuation of earlier articles on the morphology Old Dutch (2019) weak declensions substantives and personal names that appear in place from 8th to 10th century are discussed. This also offers opportunity for critical view some attested this period.