Results 131 to 140 of about 218,762 (405)
The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]
, 2019 The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto +6 more
core +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.This graphical abstract illustrates the steps carried out in the laboratory study, including saponin modification and characterization, surface tension, interfacial tension, contact angle, adsorption, and surfactant injection tests. Abstract In this study, three forms of saponin surfactants extracted from the Camellia sinensis plant (CS1, CS2, and CS3)
Iman Nowrouzi +2 more
wiley +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract In solid–liquid–vapour systems, the effect of film pressure (πe$$ {\pi}_e $$) by vapour adsorbate molecules becomes significant when the solid surface energy is similar to or larger than that of the liquid. We extend Young equation applicability to estimate contact angles of pure and mixed liquids on smooth solids by including πe$$ {\pi}_e $$,
Aliakbar Roosta, Nima Rezaei
wiley +1 more source
BiomimeticsEnergy-dispersive X-ray spectrometry (EDX), a standard technique in mineralogy and criminalistics, has not yet been fully incorporated into the study of various biomineral structures of invertebrates, despite the growing popularity of this topic in the ...
Dmitry A. Ozerov +4 more
doaj +1 more source
Pigment‐Macromolecule Complexes Isolation from Sea Urchin Biomineral Waste for Coloring Materials
Chemistry–Methods, EarlyView.A methodology has been developed to extract the colored organic fraction occluded within seashell biomineral waste. Applied to sea urchin skeletons, free polyhydroxylated naphthoquinone (PHNQ) pigments and PHNQ‐macromolecule complexes are isolated. These complexes show superior pH stability in purple hues compared to free PHNQ, which shifts from red to
Claudio Ferreira +12 more
wiley +1 more source
Electrochemical and biomimetic deposition of calcium phosphates on titanium alloys
Физико-химические аспекты изучения кластеров, наноструктур и наноматериаловThe presence of impurities of other metals in titanium alloys affects the composition of the oxide film after heat treatment: in addition to rutile, the VT 00 alloy contains Ti6O oxide, which in the VT 1-0 and VT 6 alloys is transformed into Ti3O oxide ...
A.E. Doroshenko +3 more
doaj +1 more source
Periodicity in the Solarisation of Calcite [PDF]
Nature, 1933 REPEATED solarisation due to a prolonged exposure to the light of a quartz mercury lamp was observed by the photoluminescence exhibited by calcite from Nabeto. A definite quantity (0.045 gm.) of the finely granulated specimen was put at suitable intervals of time into the depressions of the sample holder1 placed 15 cm.
openaire +1 more source
, 2020 Colloidal gels, where nanoscale particles aggregate into an elastic yet fragile network, are at the heart of materials that combine specific optical, electrical and mechanical properties. Tailoring the viscoelastic features of colloidal gels in real-time
Ahouré, L. Christian +9 more
core +2 more sources
ChemPlusChem, EarlyView.Fe and Cu exchanged natural clinoptilolites are evaluated as heterogeneous photo‐Fenton catalysts for water disinfection under visible light, using E. coli as a model pathogen. Bacterial detection limit is reached in 2 h, with no regrowth observed.
Paula Prieto‐Laria +9 more
wiley +1 more source