Publications by authors named "P Makreski"

The aim of this research was to develop a process analytical technology (PAT) tool for monitoring the transformation of the active ingredient ibuprofen into the fast-dissolving salt ibuprofen sodium during the wet granulation process. Two near-infrared (NIR) spectrophotometers, portable and benchtop spectrophotometer, were compared. During the analysis with the built models, both demonstrated comparable accuracy and precision (R2X = 0.

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Sport nutrition supplements (SNS) are vulnerable to adulteration with melamine, artificially augmenting their protein content as determined by conventional assay methodologies. Vibrational spectroscopy techniques are suitable for the detection of adulteration because they allow rapid analysis, require minimal sample preparation, and can perform numerous analyses in a short time. The aim of this study was to develop rapid quantification models for the determination of melamine adulteration in a variety of SNS matrices using NIRS (near-infrared spectroscopy) in combination with multivariate data processing.

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Article Synopsis
  • The study systematically assessed the solid forms of sitagliptin phosphate using various analytical techniques and revealed the transformation from its monohydrate form to a new anhydrous form IV after recrystallizing from ethanol.
  • The new form IV was found to be stable under specific temperature and humidity conditions, while another anhydrous form II produced from thermal heating proved to be metastable and converted into form IV under certain conditions.
  • The research provides an accurate chemical composition for form IV, previously misidentified, and is the first to detail the crystal structure of the metastable anhydrous form II.
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Lipid nano-systems were prepared and characterized in a series of well-established in vitro tests that could assess their interactions with the and cell lines as a model for the blood-brain barrier and neuronal function, accordingly. The prepared formulations of nanoliposomes and nanostructured lipid carriers were characterized by z-average diameters of ~120 nm and ~105 nm, respectively, following a unimodal particle size distribution (PDI < 0.3) and negative Z-potential (-24.

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Strontium ferromolybdate, SrFeMoO, is an important member of the family of double perovskites with the possible technological applications in the field of spintronics and solid oxide fuel cells. Its preparation a multi-step ceramic route or various wet chemistry-based routes is notoriously difficult. The present work demonstrates that SrFeMoO can be mechanosynthesized at ambient temperature in air directly from its precursors (SrO, α-Fe, MoO) in the form of nanostructured powders, without the need for solvents and/or calcination under controlled oxygen fugacity.

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