89 research outputs found
Π’Π΅ΡΠΌΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΡ, ΡΠ²ΡΠ·Π°Π½Π½Π°Ρ Ρ ΠΊΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΠ΅ΠΉ, Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΊΠ½ΠΈΠ³ΠΈ Π. ΠΡΡΠ΅Π½ΡΠΎΠ½Π° Β«KoerΒ»: ΠΠ΅ΡΠ΅Π²ΠΎΠ΄ Ρ ΠΊΠΎΠΌΠΌΠ΅Π½ΡΠ°ΡΠΈΡΠΌΠΈ Ρ ΡΡΡΠΎΠ½ΡΠΊΠΎΠ³ΠΎ Π½Π° ΡΡΡΡΠΊΠΈΠΉ ΡΠ·ΡΠΊ
ΠΠ°ΡΡΠΎΡΡΠ°Ρ ΡΠ°Π±ΠΎΡΠ° ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° Π°Π½Π°Π»ΠΈΠ·Ρ ΠΏΠ΅ΡΠ΅Π²ΠΎΠ΄Π° Π½Π°ΡΡΠ½ΡΡ
ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ², ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ ΠΊΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΠ΅ΠΉ, ΠΊΠΎΡΠΎΡΡΠ΅ Π²ΡΠ·Π²Π°Π»ΠΈ Ρ Π½Π°Ρ ΡΡΡΠ΄Π½ΠΎΡΡΠΈ Π² Ρ
ΠΎΠ΄Π΅ ΠΏΠ΅ΡΠ΅Π²ΠΎΠ΄Π° ΡΠ°ΡΡΠΈ Π²ΠΎΡΡΠΌΠΎΠΉ Π³Π»Π°Π²Ρ ΡΡΡΠΎΠ½ΡΠΊΠΎΠΉ ΠΊΠ½ΠΈΠ³ΠΈ Π. ΠΡΡΠ΅Π½ΡΠΎΠ½Π° Β«KoerΒ» Π½Π° ΡΡΡΡΠΊΠΈΠΉ ΡΠ·ΡΠΊ, ΠΊΠΎΡΠΎΡΠ°Ρ ΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠΌ Π½Π°ΡΠ΅Π³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠ±ΡΠ°Π½Π½Π°Ρ ΡΠ΅ΠΌΠ° ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»ΡΠ΅ΡΡΡ Π½Π°ΠΌ Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΈ ΠΈΠ½ΡΠ΅ΡΠ΅ΡΠ½ΠΎΠΉ, ΠΏΠΎΡΠΊΠΎΠ»ΡΠΊΡ ΡΡΠ΅ΡΠ° ΡΠ°Π·Π²Π΅Π΄Π΅Π½ΠΈΡ, ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΠΈ ΠΎΠ±ΡΡΠ΅Π½ΠΈΡ ΡΠΎΠ±Π°ΠΊ ΠΎΡΠ΅Π½Ρ ΠΏΠΎΠΏΡΠ»ΡΡΠ½Π° Π² ΠΡΡΠΎΠ½ΠΈΠΈ. ΠΡΠ΄ΡΠΌ, ΠΊΠΎΡΠΎΡΡΠ΅ ΠΈΠ½ΡΠ΅ΡΠ΅ΡΡΡΡΡΡ ΠΊΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΠ΅ΠΉ ΠΈ Ρ
ΠΎΡΡΡ Π·Π°Π½ΠΈΠΌΠ°ΡΡΡΡ ΡΠΎΠ±Π°ΠΊΠ°ΠΌΠΈ Π½Π° Π±ΠΎΠ»Π΅Π΅ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΌ ΡΡΠΎΠ²Π½Π΅, Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡ Ρ
ΠΎΡΠΎΡΠΈΠ΅ Π»ΠΈΡΠ΅ΡΠ°ΡΡΡΠ½ΡΠ΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΈ, Π² ΠΊΠΎΡΠΎΡΡΡ
ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΡ Π²Π΅ΡΠ½Π°, Π° ΡΠ°ΠΌ ΡΠ΅ΠΊΡΡ Π½Π΅ΡΠ»ΠΎΠΆΠ΅Π½ Π΄Π»Ρ ΠΏΠΎΠ½ΠΈΠΌΠ°Π½ΠΈΡ.https://www.ester.ee/record=b5464110*es
Non-destructive identification of defects and classification of Hass avocado fruits with the use of a hyperspectral image
Received: January 15th, 2022 ; Accepted: April 19th, 2022 ; Published: May 2nd, 2022 ; Correspondence: [email protected] analysis and instrumental analytical methods are used in determining the
maturity and quality monitoring of avocado fruits, which are labor-intensive and do not allow the
determination of fruit quality in real time. The use of hyperspectral imaging (HSI) methods in the
range of 400β1,000 nm and of the multivariate analysis was demonstrated for a non-destructive
grading of Hass avocado fruits into quality classes according to the number of hidden defects.
Using the sensory analysis, avocado fruits were separated into quality classes according to the
number of defects after being stored for 10 days. Development of a classification model included
several steps: image recording and analysis using the ANOVA and PCA method, image
segmentation (selection of ROI), pre-processing (SNV-correction, centering), selection of a
multivariate classification method (PLS-DA, SIMCA) and a spectral range, model verification.
The analysis of hyperspectral images of avocado fruits has detected spectral regions with the
maximal variance responsible for the change of the content of pigments and moisture within the
avocado fruit exocarp. Comparison of PLS-DA and SIMCA models on the basis of best accuracy
and test-validation results was carried out. Comparison of models showed SIMCA model as the
most efficient model for fruit classification into quality classes depending on the number of
hidden defects. The implementation of the developed approach as a digital avocado fruit sorting
system at different stages of the product life cycle is proposed
Phase segregation in NaxCoO2 for large Na contents
We have investigated a set of sodium cobaltates (NaxCoO2) samples with
various sodium content (0.67 \le x \le 0.75) using Nuclear Quadrupole Resonance
(NQR). The four different stable phases and an intermediate one have been
recognized. The NQR spectra of 59Co allowed us to clearly differentiate the
pure phase samples which could be easily distinguished from multi-phase
samples. Moreover, we have found that keeping samples at room temperature in
contact with humid air leads to destruction of the phase purity and loss of
sodium content. The high sodium content sample evolves progressively into a
mixture of the detected stable phases until it reaches the x=2/3 composition
which appears to be the most stable phase in this part of phase diagram.Comment: 5 pages, 4 figure
ΠΠΎΠΏΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΠΉ ΡΠ°ΡΠΌΠ°ΠΊΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π½Π°Π»ΠΈΠ· Π² ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ΅ Lixoft Monolix
The article has discussed a step-by-step algorithm for developing population pharmacokinetics models in the Lixoft Monolix software. Features of population pharmacokinetics studyβs methodology have described. Special attention is paid to the advantages of the compartmental approach and nonlinear mixed effects modeling in study of pharmacokinetics. Methods for estimating population pharmacokinetic parameters and its implementation in software are described.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΠΎΡΠ°Π³ΠΎΠ²ΡΠΉ Π°Π»Π³ΠΎΡΠΈΡΠΌ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΏΠΎΠΏΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΡΠ°ΡΠΌΠ°ΠΊΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π² ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ΅ Lixoft Monolix. ΠΠΏΠΈΡΠ°Π½Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΠΎΠΏΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΡΠ°ΡΠΌΠ°ΠΊΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ. ΠΡΠ΄Π΅Π»ΡΠ½ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΡΠ΄Π΅Π»ΡΠ΅ΡΡΡ ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²Π°ΠΌ ΠΊΠ°ΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΈ Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΌΠ΅ΡΠ°Π½Π½ΡΡ
ΡΡΡΠ΅ΠΊΡΠΎΠ² Π² ΠΈΠ·ΡΡΠ΅Π½ΠΈΠΈ ΡΠ°ΡΠΌΠ°ΠΊΠΎΠΊΠΈΠ½Π΅ΡΠΈΠΊΠΈ. ΠΠΏΠΈΡΠ°Π½Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΎΡΠ΅Π½ΠΈΠ²Π°Π½ΠΈΡ ΠΏΠΎΠΏΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΡΠ°ΡΠΌΠ°ΠΊΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΈ ΠΈΡ
ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΡ Π² ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠΌ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠΈ
Phase segregation in NaxCoO2 for large Na contents
We have investigated a set of sodium cobaltates (NaxCoO2) samples with various sodium content (0. 67 β€ x β€ 0. 75) using Nuclear Quadrupole Resonance (NQR). The four different stable phases and an intermediate one have been recognized. The NQR spectra of 59Co allowed us to clearly differentiate the pure phase samples which could be easily distinguished from multi-phase samples. Moreover, we have found that keeping samples at room temperature in contact with humid air leads to destruction of the phase purity and loss of sodium content. The high sodium content sample evolves progressively into a mixture of the detected stable phases until it reaches the x = 2/3 composition which appears to be the most stable phase in this part of phase diagram. Β© 2010 Pleiades Publishing, Ltd
Na ordering imprints a metallic kagomΓ© lattice onto the Co planes of Na2/3CoO2
We report 23Na and 59Co nuclear magnetic (NMR) and quadrupolar resonance (NQR) studies for the x=2/3 phase of the lamellar oxide NaxCoO2, which allowed us to establish reliably the atomic order of the Na layers and their stacking between the CoO2 slabs. We evidence that the Na+ order stabilizes filled non-magnetic Co 3+ ions on 25% of the cobalt sites arranged in a triangular sublattice. The transferred holes are delocalized on the 75% complementary cobalt sites which unexpectedly display a planar cobalt kagomΓ© structure. These experimental results resolve a puzzling issue by precluding localized moments pictures for the magnetic properties. They establish that the quasi-ferromagnetic properties result from a narrow band connecting a frustrated arrangement of atomic orbitals, and open the route to unravel through similar studies the electronic properties of the diverse ordered phases of sodium cobaltates. Copyright Β© 2009 EPLA
Nuclear quadrupole resonance and x-ray investigation of the structure of Na2/3 CoO2
We have synthesized various samples of the x=2/3 phase of sodium cobaltate Nax CoO2 and performed x-ray powder diffractions spectra to compare the diffraction with the structure proposed previously from NMR and nuclear quadrupole resonance (NQR) experiments. Rietveld analyses of the data are found in perfect agreement with those and confirm the concentration x=2/3 obtained in the synthesis procedure. They even give indications on the atomic displacements of Na inside the unit cell. The detailed NQR data allow us to identify the NQR transitions and electric field gradient parameters for four cobalt sites and three Na sites. The spin-lattice and spin-spin relaxation rates are found much smaller for the nonmagnetic Co3+ sites than for the magnetic sites on which the holes are delocalized. The atomic ordering of the Na layers is therefore at the source of this ordered distribution of cobalt charges. The method used here to resolve the Na ordering and the subsequent Co charge order can be used valuably for similar structural determinations for various phases with x>0.45 for which Na ordering has been established. Β© 2009 The American Physical Society
ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΡΠ²ΠΎΡΠΎΡΠΎΡΠ½ΡΡ /ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΉ ΠΏΡΠΈΡ ΠΎΡΡΠΎΠΏΠ½ΡΡ ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠΎΠ² Π² ΡΠ΅ΡΠ°ΠΏΠ΅Π²ΡΠΈΡΠ΅ΡΠΊΠΎΠΌ Π»Π΅ΠΊΠ°ΡΡΡΠ²Π΅Π½Π½ΠΎΠΌ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π΅
The article considers the main methodological methods of therapeutic drug monitoring (TDM) of psychotropic drugs. Analytical methods that allow performing these studies have been described. It has been given the interpretation, examples and brief results of two studies of TDM of antipsychotic drugs made in FSBSI βMental Health Research Centerβ and Psychiatric hospital No.14 in Moscow.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΡΠΈΡΠΌΡ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠ΅ΡΠ°ΠΏΠ΅Π²ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π»Π΅ΠΊΠ°ΡΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° (Π’ΠΠ) ΠΏΡΠΈΡ
ΠΎΡΡΠΎΠΏΠ½ΡΡ
ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠΎΠ². ΠΠΏΠΈΡΠ°Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠ΅ Π²ΡΠΏΠΎΠ»Π½ΡΡΡ ΡΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠΈΠ²Π΅Π΄Π΅Π½Π° ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠ°ΡΠΈΡ, ΠΏΡΠΈΠΌΠ΅ΡΡ ΠΈ ΠΊΡΠ°ΡΠΊΠΈΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ 2 ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π’ΠΠ Π°Π½ΡΠΈΠΏΡΠΈΡ
ΠΎΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠΎΠ², Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π½ΡΡ
Π½Π° Π±Π°Π·Π΅ Π€ΠΠΠΠ£ ΠΠ¦ΠΠ ΠΈ ΠΡΠΈΡ
ΠΈΠ°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π±ΠΎΠ»ΡΠ½ΠΈΡΡ β 14 Π³. ΠΠΎΡΠΊΠ²Ρ
Novel effectively carbonaceous and sulfurated hydrogen corrosion inhibitors on the basis of organosulfurphosphorus compounds
Novel ammonium salts of O,O-dialkyl dithiophosphoric acids were obtained by one-pot synthesis from white phosphorus, elemental sulfur, industrial alcohols or phenols, and amines. Long-chain S-alkyl O,O-dialkyldithiophosphonates were prepared by the reaction of red phosphorus with elemental sulfur, alcohols, and the cheap industrial fractions of C16-C18 and C 20-C26 of higher Ξ±-olefins in the presence of Lewis acid catalyst. The dithiophosphates obtained possess the high anticorrosion activities toward mild steel. Β© 2013 Copyright Taylor and Francis Group, LLC
- β¦