AbstractThe ability of hesperidin (HP) to form complexes with five metals; cobalt, nickel, zinc, calcium and magnesium was investigated. The complexation was studied using U.V spectroscopic titration, in methanol as well as aqueous buffer solutions (physiological conditions). Potential complexes were studied by IR and NMR spectroscopy, melting point and their solubility were also evaluated. The...

AbstractThe ability of hesperidin (HP) to form complexes with five metals; cobalt, nickel, zinc, calcium and magnesium was investigated. The complexation was studied using U.V spectroscopic titration, in methanol as well as aqueous buffer solutions (physiological conditions). Potential complexes were studied by IR and NMR spectroscopy, melting point and their solubility were also evaluated. The...

The tectonic significance of the Muness Phyllite, which overlies Unst–Fetlar ophiolite in Shetland, Scottish Caledonides, is poorly understood. U–Pb analyses detrital zircons show that it was deposited after c . 469 Ma. Early Paleozoic grains have εHf values −0.3 to +12.3 and were probably derived from extension Midland Valley arc. Psammite clasts matrix Phyllite contain Proterozoic Archean wit...

Furnes et al. (1) reported that a sheeted-dike complex they identified within the ~3.8billion-year-old Isua supracrustal belt (ISB) in Greenland provides the oldest evidence of oceanic crustal accretion by spreading. However, they did not alert readers that the ISB contains supracrustal rocks and mafic dikes of different ages (2, 3). They also failed to demonstrate that the proposed components ...

Abstract The punctuated distribution of major gold deposits along orogenic belts is poorly understood. In northern Perú, cluster trends that transect the subparallel Phanerozoic accreted onto western margin Archean–Proterozoic Amazonian craton. This suggests influence as yet unrecognized pre-Andean basement structures in controlling localization deposits. We report newly discovered Tomac ophiol...

Abstract New zircon U-Pb geochronology from a peridotite suite near Ranau and the Telupid ophiolite in Sabah, eastern Malaysia, contradict previous studies, which assumed that Sabah mafic-ultramafic rocks are largely ophiolitic Jurassic–Cretaceous age. We show these formed during magmatic episode Miocene (9.2–10.5 Ma), is interpreted to reflect infiltration of melts melt-rock reaction subcontin...