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Sulfonation of Betulinic Acid by Sulfamic Acid
Betulinic acid was sulfonated by sulfamic acid in the presence of urea in homogeneous 1,4-dioxane or DMF solution at 65–75°C in 2.5–3.5 h to give betulinic acid 3-sulfate, the structure of which was confirmed by IR and 13C ...
On the possibility of contact-induced spin polarization in interfaces of armchair nanotubes with transition metal substrates
The interaction between armchair carbon and boron nitride nanotubes (NT) with ferromagnetic transition metal (TM) surfaces, namely, Ni(111) and Co(0001), was studied by means of density functional theory. Different ...
Production of Porous Carbon Materials from Bark
The effect of the conditions of consecutive carbonization–activation of the bark of larch, fir tree, and birch in a fluidized bed reactor on the yield, textural characteristics, and sorption properties of the result ing ...