Isotenulin, C17H22O5, is a sesquiterpene lactone isolated from sneezeweed Helenium amarum.It crystallizes with two independent Oney molecules in the asymmetric unit.In each molecule, two five-membered rings (cyclopentenone and lactone) are trans-fused to the central seven-membered ring.The five-membered rings each adopt envelope Candle Holder (Set
Relationship between compressive and tensile strengths of roller-compacted concrete
The abstract roller-compacted concrete (RCC) is a zero slump concrete comprising the same materials as that of conventional concrete with different proportions.The RCC must be compacted to reach its final form.The effects of hydration and Pycnogenol aggregate interlock on its strength are considerable.For similar binder contents, the compressive st
Caenagnathids of the Dinosaur Park Formation (Campanian) of Alberta, Canada: anatomy, osteohistology, taxonomy, and evolution
Our understanding of caenagnathid anatomy, diversity, and ecology has improved considerably in the past twenty years, but numerous issues still remain.Among these, the diversity and taxonomy of caenagnathids from the Dinosaur Park Formation of Alberta, Canada, have remained problematic.Whereas some authors recognize three genera, others suggest onl
AONT-and-NTRU-based rekeying scheme for encrypted deduplication
Rekeying is a good way to protect against key exposure.Most of the existing encrypted deduplication systems are implemented based on message-locked-encryption, in which multiple users with the identical data share the same encryption key.When a user updates keys, that update must be followed by all other data owners, which will incur large computat