Search Results

You are looking at 1 - 10 of 16 items for :

  • "recrystallization" x
  • Chemistry and Chemical Engineering x
  • Refine by Access: Content accessible to me x
Clear All

structure of honey can change, the mobility of ions and charged groups can increase causing a decrease of electrical impedance of honey. The recrystallization of honey, the recovery to the original state presumably takes a relatively long time – some weeks

Open access

transformation, which previously overlapped as an effect of the MA process (Figs. 2 , 3 ). This phenomenon may be connected with the recovery and recrystallisation effects. Intensity and position of endothermic peaks were similar to those of the based Astaloy

Open access

PET recrystallization was observed [ 20 ]. Addition of waste PET caused changes occurring in studied compositions as an effect of temperature, while the biggest changes were observed in decomposition temperature. The increase of PET addition

Open access

in the range of about 660–766 °C are the result of melting of compounds re-crystallized in the previous temperature range. Thermal curves (DSC, TG) of mixtures of mechanically activate glasses and 10 wt% CaCl 2 are shown in Figs. 1 and 2

Open access

–750 °C (with a maximum rate above 700 °C). Rapid recrystallization of anhydrous phase occurs after this stage at above 800 °C. The main product of this transformation is forsterite (Mg 2 SiO 4 ). Enstatite (MgSiO 3 ) can be formed at higher temperature

Open access

filtration and recrystallized from ethanol or ethyl acetate. Monomers The monomers have been prepared by N -alkylation reaction of listed above hydantoins ( 1–3 ) with 4-vinylbenzyl chloride in DMF at the room

Open access

dissolved in common organic solvents, it is assumed that recrystallization can be applied to their isolation. In fact, cooling of the ethanolic extract of T. ruticarpum yielded fraction FR1 as evodiamine (1.6 g). The filtrate FL1 was then concentrated and

Open access

of activation of glasses to 2 h causes a further increase in the degree of their recrystallization. Fig. 5 XRD spectra of glass Ab mechanic activated for 0 min, 20 min, and 2 h

Open access

glass and crystals of a nanosize appear at low temperature, close to glass transformation T g . With further heating, temperature increase and glass viscosity diminishing the growth of the precipitated nanocrystals takes place (recrystallization) and

Open access

the partially recrystallized glasses was accompanied by changes of the specific heat Δ C p which values diminished (18Cu6P) and finally completely disappeared (35Cu6P). The mentioned above changes of the parameters characterizing glass

Open access