Results 41 to 50 of about 37,835 (161)

Four New ent-Kaurane Diterpene Glycosides from Isodon henryi

open access: yesMolecules, 2019
To obtain diterpene glycosides from an aqueous extract of the aerial parts of Isodon henryi and further investigate their cytotoxicities, in this study, a total of seven compounds were isolated, including six ent-kaurane diterpene glycosides (1−6 ...
Ya-Lin Liu   +6 more
doaj   +1 more source

Tensile and Compressive Properties of Kaolin Rienforced Epoxy

open access: yesAl-Khawarizmi Engineering Journal, 2015
The toughening of epoxy resins with the addition of organic or inorganic compounds is of great interest nowadays, considering their large scale of applications.
Jabbar Hussein Mohmmed
doaj   +4 more sources

Sterols from the Green Alga Ulva australis

open access: yesMarine Drugs, 2017
Three new sterols, (24R)-5,28-stigmastadiene-3β,24-diol-7-one (1), (24S)-5,28-stigmastadiene-3β,24-diol-7-one (2), and 24R and 24S-vinylcholesta-3β,5α,6β,24-tetraol (3), together with three known sterols (4–6) were isolated from the green alga Ulva ...
Guo-Liang Li   +7 more
doaj   +1 more source

Thermal degradation behavior and pyrolysis products of electrical-grade epoxy resins under extreme thermal conditions

open access: yesMaterials Research Express
The pyrolysis behaviour of three epoxy resin systems commonly used in electrical power equipment was comparatively investigated to elucidate structure-dependent degradation pathways and product evolution under extreme thermal conditions ...
Xiaofeng Chen   +7 more
doaj   +1 more source

Triterpenes from the Mushroom Hypholoma lateritium: Isolation, Structure Determination and Investigation in Bdelloid Rotifer Assays

open access: yesMolecules, 2019
Twelve compounds (1–12) were isolated from the methanol extract of brick cap mushroom (Hypholoma lateritium (Schaeff.) P. Kumm.). The structures of the compounds were elucidated using extensive spectroscopic analyses, including NMR and MS ...
Bayar Chuluunbaatar   +9 more
doaj   +1 more source

Cytotoxic and Radical Scavenging Nor-Dammarane Triterpenoids from Viburnum mongolicum

open access: yesMolecules, 2013
The ethanol extract of the whole plants of Viburnum mongolicum afforded six new nor-dammarane triterpenoids: 3β,12β-dihydroxy-25,26,27-trinordammara-22-en -24,20-olide (1), 3β,12β-dihydroxy-24α-methoxy-25,26,27-trinordammara-20,24-epoxy (2), 3β-O-acetyl ...
Wei Wang, Xiaohua Wang
doaj   +1 more source

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