The active molecules or bioactives (i.e., polysaccharides, fatty acids, proteins, polyphenols, diterpenes, steroids and alkaloids) from algae (seaweed and microalgae) have been widely studied in recent years for multiple pharmaceutical and nutraceutical applications. Innovative and emerging technolo...
This book is a collection of 13 innovative papers describing the state of the art and the future perspectives in solid-phase extraction covering several analytical fields prior to the use of gas or liquid chromatographic analysis. New sorptive materials are presented including carbon nanohorn supras...
Phytoalexins are antimicrobial substances of low molecular weight produced by plants in response to infection or stress, which form part of their active defense mechanisms. It is now clear that phytoalexins exhibit toxicity across much of the biological spectrum, prokaryotic and eukaryotic. Starting...
Elands Bay Cave provides the opportunity to characterize Holocene technologies and hunter-gatherers adaptations in the West Coast of South Africa. In this paper, we discuss the question of adhesives uses and manufactures by applying a biomolecular and technological analysis to three unpublished orga...
Elands Bay Cave provides the opportunity to characterize Holocene technologies and hunter-gatherers adaptations in the West Coast of South Africa. In this paper, we discuss the question of adhesives uses and manufactures by applying a biomolecular and technological analysis to three unpublished orga...
Humic substances naturally occur in Miocene/Pliocene-aged lignite at very high concentrations. Here biomarkers in the bitumen-free extract of humic acids from Thracian lignite, Bulgaria, are studied. Applying methods of organic geochemistry a broad range of compounds are isolated and characterised....
Seven known abietane diterpenes were isolated from five Plectranthus species, namely P. hadiensis, P. lucidus, P. ecklonii, P. purpuratus subsp. purpuratus and P. purpuratus subsp. tongaensis. The seven compounds were tested for their antiplasmodial activity and for their ability to inhibit β-haemat...
Grindelia pulchella callus and cell suspension cultures were established from seedling leaves. When several phytoregulator supplementations were assayed in solid Murashige and Skoog medium containing 3% (w/v) of sucrose (MS medium), combinations of indole-3-butyric acid (IBA) and N6-benzylaminopurin...
Les outils géochimiques moléculaires et isotopiques, couramment mis en oeuvre pour étudier le pétrole et les asphaltes naturels, ont été utilisés pour déterminer la nature des échantillons de trois sites archéologiques de la région du lac de Sanguinet dans les Landes. Les échantillons de « poix » du...