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Цветкова, Е. А.; Volkova, M. Yu.; Степаненко, О. Б.; Avdyunina, N. I.; Bol’shakova, R. F.; Pyatin, B. M.

doi:10.1023/a:1015158213734

Cited by 2 publications

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“…Titration of the dry residue after evaporation of the solution for injection was carried out under the conditions developed earlier for the drug substance and a solid dosage drug form of I [6] in formic acid and acetic anhydride. Model solutions with an active ingredient content equivalent to its content in the drug form were prepared for developing the method.…”

Section: Resultsmentioning

confidence: 99%

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Pharmaceutical analysis and standardization of gimantan parenteral dosage form

et al. 2011

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The objective of this investigation was to develop methods for the pharmaceutical analysis of a parenteral dosage form of gimantan, a new anti-Parkinson's drug. The physicochemical properties of gimantan solution for injection have been investigated. Methods for the determination of the impurity content and the quantitative drug assay were developed based on thin-layer chromatography (TLC) and gas chromatography (GC), respectively. The drug was identified using TLC and GC simultaneously with the purity evaluation and quantitative determination of gimantan. The stability during storage has been studied. The quality standards for gimantan parenteral dosage form have been developed.

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Section: Resultsmentioning

confidence: 99%

“…(40:4:1) and the previously developed method for I drug substance [6]. Adsorption bands of N-containing impurities were detected using iodine vapor; an impurity of adamantan-2-one, by treatment with 2,4-dinitrophenylhydrazine in HCl and EtOH (1:1).…”

Section: Experimental Partmentioning

confidence: 99%

Pharmaceutical analysis and standardization of gimantan parenteral dosage form

et al. 2011

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“…These are the points (or lines), connected by the wave vector Q max , corresponding to the peak position, and having opposite Fermi velocities in two perpendicular directions. Since the sharp maximum of the susceptibility is preserved with changing pressure, these points (or lines), corresponding to 'local nesting' regions, are not destroyed with applying pressure (see also reference [15]).…”

Section: Non-local Magnetic Propertiesmentioning

confidence: 99%

“…It was argued recently that Kohn points may form lines, located on the Fermi surfaces [13,14]. These lines are preserved by the interaction effects [13], and seem to be present in chromium [14,15].…”

Section: Introductionmentioning

confidence: 99%

Itinerant magnetism of chromium under pressure: a DFT+DMFT study

Белозеров

Катанин

Анисимов

2021

J. Phys.: Condens. Matter

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We consider electronic and magnetic properties of chromium, a well-known itinerant antiferromagnet, by a combination of density functional theory (DFT) and dynamical mean-field theory (DMFT). We find that electronic correlation effects in chromium, in contrast to its neighbors in the periodic table, are weak, leading to the quasiparticle mass enhancement factor m * /m ≈ 1.2. Our results for local spin-spin correlation functions and distribution of weights of atomic configurations indicate that the local magnetic moments are not formed. Similarly to previous results of DFT at ambient pressure, the non-uniform magnetic susceptibility as a function of momentum possesses close to the wave vector Q H = (0, 0, 2π/a) (a is the lattice constant) sharp maxima, corresponding to Kohn anomalies. We find that these maxima are preserved by the interaction and are not destroyed by pressure. Our calculations qualitatively capture a decrease of the Néel temperature with pressure and a breakdown of itinerant antiferromagnetism at pressure of ∼9 GPa in agreement with experimental data, although the Néel temperature is significantly overestimated because of the mean-field nature of DMFT.

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Cited by 2 publications

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Pharmaceutical analysis and standardization of gimantan parenteral dosage form

Pharmaceutical analysis and standardization of gimantan parenteral dosage form

Itinerant magnetism of chromium under pressure: a DFT+DMFT study

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