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The purposes of this study were to clarify the amorphization by ball milling of atorvastatin calcium sesquihydrate (AT) and to analyse the change in dissolution kinetics. Methods The amorphous AT was prepared from crystal AT by ball milling and analysed in terms of the changes of its physicochemical properties by powder Xray diffraction analysis (XRD), thermal analysis and infrared spectroscopy (IR).
The BN destruction and amorphization under ball milling. Fig. 2 shows the dependence of specic surface area measured by BET on the dose of mechanical treatment. At the initial stage of mechanical treatment specic surface area increases with increase of the dose, reaches maximum of about 400m. 2 /g (at the dose of
For a review: a) A . and H. Bakker The present results suggest the importance of an energetically uphill process through ball milling for amorphization of the system with a positive
We discover that this guest retention is greatly enhanced upon facile amorphisation by ball milling, particularly in the case of ZIFmnIm, for which I 2 loss is retarded by as much as 200 #176;C. It is anticipated that this general approach should be applicable to the wide range of available metalorganic frameworktype materials for the permanent storage of harmful guest species.
202047 amorphization by ball milling a review. Amorphization of different cellulose samples by ball milling Effect of ballmilling pretreatment on pyrolysis characteristics of cellulose was studied by thermogravimetric analysis TGA at four different heating rates 5 10 20 and 40 Kmin Variation in
Feb 01, 1990#0183;#32;Major conclusions from this work relevant to amorphization by MM are: 1] large values for the stored enthalpy of cold work can be obtained by high energy ball milling much larger than in conventional deformation processes; 2] crystailite re finement by ball milling can produce a fine nano crystalline structure such that a significant fraction of atoms are in a higher energy configuration at the
Understanding the amorphization of indomethacin during ball milling using thermal techniques Shyamal Chandra Das, Peter James Stewart, S Gaisford Drug Delivery Disposition amp; Dynamics
Variations in the aptitudes toward amorphization of the three L12type alloys under ballmilling conditions are attributed in part to the differences in the lattice stability terms of their
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