Dimethyl sulfoxide ch3 2so

Balsa wood (Ochroma pyramidale)
of density 113 ± 3 kg/m³ was bought from Material
AB, Sweden. Birch wood (Betula pendula, 558 ± 33 kg/m³), spruce wood (Picea
abies, 407 ± 8 kg/m³), and ash wood
(Fraxinus excelsior, 644 ± 15
kg/m³) were all bought from Calexico Wood AB. All wood
types were cut to dimensions of 15 × 15 × 10 mm³ (tangential × radial × axial). Dimethyl sulfoxide ((CH₃)₂SO) was purchased from Sigma-Aldrich, Sweden.
7-Methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD) was obtained from
Liuotin Group OY. Dimethyl methylphosphonate (DMMP) (+99%) was purchased
from Merck or ABCR GmbH. Chemicals used for lignin analysis were as
follows; 1,4-dioxane, pyridine, acetic anhydride, methanol, and toluene
(all purchased from Sigma-Aldrich, Sweden)

Ferrous chloride tetrahydrate (FeCl₂·4H₂O) and ferric chloride hexahydrate (FeCl₃·6H₂O) with 99% purity were supplied by Merck (Darmstadt, Germany). Ammonia solution (25%) was obtained from Scharlau (Barcelona, Spain). In order to coat the magnetite nanoparticles with polymer, polyvinyl alcohol (PVA) with an average M.W. of 6000 was used, which was sourced from Acros Organics (Morris plains, NJ, USA). Aluminum nitrate (Al(NO₃)₃·9H₂O) (98.5% purity) and magnesium nitrate (Mg(NO₃)₂·6H₂O) (99% purity) were acquired from ChemAR (Kielce, Poland). 5-fluorouracil (C₄H₃FN₂O₂) was purchased from AKSci (Union, CA, USA) at 98% purity. Dimethyl sulfoxide ((CH₃)₂SO) of 99% purity was also used as a solvent for the drug and was obtained from Sigma Aldrich (St Louis, MO, USA). Deionized water (18.2 M Ωcm⁻¹) was used in the preparation of all the aqueous solution.