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Journal articles on the topic 'Decomposition of dispersions'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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1

Holze, R., A. T. Riga, and E. B. Yeager. "Thermal decomposition of surfactants in PTFE-dispersions." Journal of Materials Science Letters 5, no. 8 (1986): 819–22. http://dx.doi.org/10.1007/bf01730102.

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2

Miller, Clarence A., and David D. Miller. "Network formation by spinodal decomposition in colloidal dispersions." Colloids and Surfaces 16, no. 2 (1985): 219–23. http://dx.doi.org/10.1016/0166-6622(85)80254-7.

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3

Czech, Zbigniew, and Robert Pełech. "Thermal decomposition of polyurethane pressure-sensitive adhesives dispersions." Progress in Organic Coatings 67, no. 1 (2010): 72–75. http://dx.doi.org/10.1016/j.porgcoat.2009.09.019.

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4

Filip, V., I. Hrádková, and J. Šmidrkal. "Antioxidants in Margarine Emulsions." Czech Journal of Food Sciences 27, Special Issue 1 (2009): S9—S11. http://dx.doi.org/10.17221/1089-cjfs.

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The lipid oxidation in margarine takes place in continuous liquid oil phase. The extension of fat interfaces in the system – emulsion of water in oil and the dispersion of fat crystals in liquid oil influences on the peroxidation, decomposition of hydroperoxides to aldehydes and the oxidative stability in the comparison with oxidation in the fat blend. Different antioxidants were used in margarine dispersions: <I>L</I>(+)ascorbic acid, ascorbyl palmitate and DL-α -tocopherol. Increasing polarity and decreasing molecular size of antioxidants have the positive influence on
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5

Fabricius, Maximilian H., Lodovico Coccato, Ralf Bender, et al. "Regrowth of stellar disks in mature galaxies: The two component nature of NGC 7217 revisited with VIRUS-W." Proceedings of the International Astronomical Union 10, S309 (2014): 81–84. http://dx.doi.org/10.1017/s1743921314009363.

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AbstractWe have obtained high spectral resolution (R ≈ 9000), integral field observations of the three spiral galaxies NGC 3521, NGC 7217 and NGC 7331 using the new fiber-based Integral Field Unit instrument VIRUS-W at the 2.7 m telescope of the McDonald Observatory in Texas. Our data allow us to revisit previous claims of counter rotation in these objects. A detailed kinematic decomposition of NGC 7217 shows that no counter rotating stellar component is present. We find that NGC 7217 hosts a low dispersion, rotating disk that is embedded in a high velocity dispersion stellar halo or bulge tha
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6

Nagarajan, Radhakrishnan. "Surrogate Testing by Estimating the Local Dispersions in Phase Space." International Journal of Bifurcation and Chaos 13, no. 08 (2003): 2241–51. http://dx.doi.org/10.1142/s0218127403007928.

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In this report, a clustering approach is presented to detect dynamical nonlinearity in a stationary time series. The one-dimensional time series sampled from a dynamical system is mapped on to the m-dimensional phase space by the method of delays. The vectors in the phase space are partitioned by k-means clustering technique. The local trajectory matrix for the vectors in each of the clusters is determined. The eigenvalues of the local trajectory matrices represent the variation along the principal directions and are obtained by singular value decomposition (SVD). The product of the eigenvalue
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7

Victor, Jean-Marc, and Jean-Pierre Hansen. "Spinodal decomposition and the liquid–vapour equilibrium in charged colloidal dispersions." J. Chem. Soc., Faraday Trans. 2 81, no. 1 (1985): 43–61. http://dx.doi.org/10.1039/f29858100043.

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8

Fiuza, Thiago, Guilherme Gomide, Alex Fabiano Cortez Campos, Fabrizio Messina, and Jérôme Depeyrot. "On the Colloidal Stability of Nitrogen-Rich Carbon Nanodots Aqueous Dispersions." C — Journal of Carbon Research 5, no. 4 (2019): 74. http://dx.doi.org/10.3390/c5040074.

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The present survey reports on the colloidal stability of aqueous dispersions of nitrogen-rich carbon nanodots (N-CDs). The N-CDs were synthesized by thermally induced decomposition of organic precursors and present an inner core constituted of a β - C 3 N 4 crystalline structure surrounded by a surface shell containing a variety of polar functional groups. N-CDs size and structure were checked by combined analysis of XRD (X-ray Diffraction) and TEM (Transmission Electron Microscopy) measurements. FTIR (Fourier-Transform Infrared Spectroscopy) experiments revealed the presence of carboxyl and a
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9

Riener, M., J. Kainulainen, H. Beuther, J. D. Henshaw, J. H. Orkisz, and Y. Wang. "Autonomous Gaussian decomposition of the Galactic Ring Survey." Astronomy & Astrophysics 633 (December 24, 2019): A14. http://dx.doi.org/10.1051/0004-6361/201936814.

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The analysis of large molecular line surveys of the Galactic plane is essential for our understanding of the gas kinematics on Galactic scales and, in particular, its link with the formation and evolution of dense structures in the interstellar medium. An approximation of the emission peaks with Gaussian functions allows for an efficient and straightforward extraction of useful physical information contained in the shape and Doppler-shifted frequency of the emission lines contained in these enormous data sets. In this work, we present an overview and the first results of a Gaussian decompositi
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10

Jelić, Dijana. "Thermal Stability of Amorphous Solid Dispersions." Molecules 26, no. 1 (2021): 238. http://dx.doi.org/10.3390/molecules26010238.

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Amorphous solid dispersion drug delivery systems (ASD DDS) were proved to be efficient for the enhancement of solubility and bioavailability of poorly water-soluble drugs. One of the major keys for successful preparation of ASD is the selection of appropriate excipients, mostly polymers, which have a crucial role in improving drug solubility and its physical stability. Even though, excipients should be chemically inert, there is some evidence that polymers can affect the thermal stability of active pharmaceutical ingredients (API). The thermal stability of a drug is closely related to the shel
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11

Ding, Lijie, Yihao Chen, and Changwoo Do. "Machine-learning-informed scattering correlation analysis of sheared colloids." Journal of Applied Crystallography 58, no. 3 (2025): 992–99. https://doi.org/10.1107/s1600576725003280.

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We have carried out theoretical analysis, Monte Carlo simulations and machine-learning analysis to quantify microscopic rearrangements of dilute dispersions of spherical colloidal particles from coherent scattering intensity. Both monodisperse and polydisperse dispersions of colloids were created and underwent a rearrangement consisting of an affine simple shear and non-affine rearrangement using the Monte Carlo method. We calculated the coherent scattering intensity of the dispersions and the correlation function of intensity before and after the rearrangement and generated a large data set o
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12

Bujdák, Juraj, Nobuo Iyi, Jana Hrobáriková, and Taketoshi Fujita. "Aggregation and Decomposition of a Pseudoisocyanine Dye in Dispersions of Layered Silicates." Journal of Colloid and Interface Science 247, no. 2 (2002): 494–503. http://dx.doi.org/10.1006/jcis.2001.8140.

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13

Meng, Yi Ding, and Hong Wei Li. "The Structure and Properties of UV-Curable Cationic Waterborne Polyurethane Acrylate." Advanced Materials Research 1090 (February 2015): 31–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1090.31.

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A series of stable double-terminated UV reactive cationic waterborne polyurethane dispersions was synthesized, while the structure was confirmed by infrared spectroscopy,laser particle size analysis and free NCO root titration; modified by co-monomerhydroxyethyl acrylate with the UV radiation fast curing, the influence of hydroxyethyl acrylate proportion and the polyurethane’s nNCO/nOH(R value) to the thermal properties, mechanical properties and yellowing of the product was investigated. The investigation illustrated the UV-curable cationic waterborne polyurethaneacrylate film effectively for
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14

Kim, Myung Jin, and Egon Matijević. "Preparation and characterization of uniform submicrometer metal niobate particles. I. Lead niobate." Journal of Materials Research 6, no. 4 (1991): 840–50. http://dx.doi.org/10.1557/jmr.1991.0840.

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Colloidal amorphous lead niobate particles of different composition and morphologies were obtained by a metal-chelate decomposition method. The nature of the dispersions depended on the conditions of the preparation of the complexes, pH, aging time, and temperature. The structural and chemical changes of the so prepared powders on calcination were investigated by thermal and x-ray diffraction analyses. Chemical mechanisms of the formation and transformation of the particles are suggested.
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15

Maulita, Arina Swastika, Agnes Nuniek Winantari, Karina Citra Rani, Aditya Trias Pradana, and Dini Kesuma. "Kajian Pembentukan Dispersi Padat Atenolol Menggunakan Metode Freeze Drying." MPI (Media Pharmaceutica Indonesiana) 7, no. 1 (2025): 111–22. https://doi.org/10.24123/mpi.v7i1.7334.

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Atenolol merupakan obat golongan β1-adrenoblocker selektif yang digunakan untuk mengobati kondisi kardiovaskular seperti hipertensi dan angina pektoris. Namun, atenolol memiliki kelarutan dan permeabilitas yang rendah hal ini dapat membatasi bioavailabilitas oralnya. Salah satu metode yang efektif untuk meningkatkan kelarutan dan laju disolusi obat dengan kelarutan rendah adalah melalui pembentukan dispersi padat. Dispersi padat melibatkan pembawa obat dalam matriks yang bersifat inert dalam keadaan padat, yang dapat meningkatkan kelarutan dan stabilitas obat. Metode freeze drying (liofilisasi
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16

Li-hong, Bao, and Yangfei-Huang. "Synthesis and Properties of UV Curable Waterborne Polyurethane Acrylate Based on Modified Castor Oil." Pharmaceutical and Chemical Journal 4, no. 6 (2017): 34–40. https://doi.org/10.5281/zenodo.13885872.

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In this study, castor oil was modified to prepare hydroxyethyl methyl acrylate (HEMA) capped waterborne polyurethane-acrylate (UV-PUA) via <em>in-situ</em> and anionic self-emulsifying method. Ultraviolet (UV) curable UV-PUA film was obtained with IRGACURE <em>819</em> as photoinitiator. The properties of UV-PUA dispersions, such as appearance, viscosity and average particle size were investigated. The structure and thermal stability of UV-PUA film were characterized by Roman spectroscopy and DTG. Some mechanical properties of UV-PUA films, such as hardness, adhesion ability and water absorpti
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17

Gherardi, F., A. Colombo, S. Goidanich, R. Simonutti, and L. Toniolo. "Innovative Nano-TiO2 Particles for Self-cleaning Treatments of Historic Architecture and Sculptures." Restoration of Buildings and Monuments 20, no. 6 (2014): 423–32. http://dx.doi.org/10.1515/rbm14.20.6-0041.

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Abstract The study reports the results of a new treatment based on water and ethylene glycol nano-TiO2 dispersions showing photocatalytic properties that was tested on both Noto stone (calcarenite) and Carrara marble. To verify that the proposed treatments did not affect the intrinsic properties of the stone materials, colour measurement, static contact angle and water absorption by capillarity tests were carried out before and after the treatments. The efficacy of the photocatalytic activity of TiO2 nanoparticles applied to the stone substrates was evaluated by decomposition tests of organic
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18

Bender, Philipp, Dominika Zákutná, Sabrina Disch, Lourdes Marcano, Diego Alba Venero, and Dirk Honecker. "Using the singular value decomposition to extract 2D correlation functions from scattering patterns." Acta Crystallographica Section A Foundations and Advances 75, no. 5 (2019): 766–71. http://dx.doi.org/10.1107/s205327331900891x.

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The truncated singular value decomposition (TSVD) is applied to extract the underlying 2D correlation functions from small-angle scattering patterns. The approach is tested by transforming the simulated data of ellipsoidal particles and it is shown that also in the case of anisotropic patterns (i.e. aligned ellipsoids) the derived correlation functions correspond to the theoretically predicted profiles. Furthermore, the TSVD is used to analyze the small-angle X-ray scattering patterns of colloidal dispersions of hematite spindles and magnetotactic bacteria in the presence of magnetic fields, t
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19

Rohan Kunder. "Synthesis of Synergist Antioxidant by Greener and Economical Methods." Journal of Information Systems Engineering and Management 10, no. 12s (2025): 391–93. https://doi.org/10.52783/jisem.v10i12s.1823.

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Various types of antioxidants are useful in industries for stabilization of dispersions and other formulations. With the increase in demand for the synthesis of new antioxidants the methods for the synthesis of these antioxidants have also become equally important. The antioxidant Propanoic acid 3-(dodecylthio)-,oxybis (2,1-ethanediyoxy-2,1-ethanediyl) ester is the one which prevents the tanning and decomposition of the latex moreover it acts or enhances the antioxidant properties when combined with other phenolic antioxidant. The economical and cost-effective way of synthesis is mentioned in
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20

Mayer, C. "Nanocapsules as Drug Delivery Systems." International Journal of Artificial Organs 28, no. 11 (2005): 1163–71. http://dx.doi.org/10.1177/039139880502801114.

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Dispersed polymer nanocapsules can serve as nano-sized drug carriers to achieve controlled release as well as efficient drug targeting. The dispersion stability and the primary physiological response are mainly determined by the type of the surfactant and the nature of the outer coating. Their release and degradation properties largely depend on the composition and the structure of the capsule walls. Another important criterion is the capsule size, where an optimum is generally seen for radii ranging between 100 and 500 nm. Nanocapsules can be prepared by four principally different approaches:
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21

Qin, Xilin, Zhixian Gui, Fei Yang, Yuanyuan Liu, Wei Jin, and Jian Xiong. "Prediction of sweet spots in tight sandstone reservoirs based on anisotropic frequency-dependent AVO inversion." Journal of Geophysics and Engineering 18, no. 5 (2021): 664–80. http://dx.doi.org/10.1093/jge/gxab044.

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Abstract The frequency-dependent amplitude-versus-offset (FAVO) method has become a practical method for fluid detection in sand reservoirs. At present, most FAVO inversions are based on the assumption that reservoirs are isotropy, but the application effect is not satisfactory for fractured reservoirs. Hence, we analyse the frequency variation characteristics of anisotropy parameters in tight sandstone reservoirs based on a new petrophysical model, and propose a stepwise anisotropic FAVO inversion method to extract frequency-dependent attributes from prestack seismic field data. First, we com
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22

Shabanov, Nabi S., Kamil Sh Rabadanov, Sagim I. Suleymanov, et al. "Water-Soluble Copper Ink for the Inkjet Fabrication of Flexible Electronic Components." Materials 14, no. 9 (2021): 2218. http://dx.doi.org/10.3390/ma14092218.

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The aim of this work is preparation and investigation of copper conductive paths by printing with a different type of functional ink. The solutions based on copper-containing complex compounds were used as inks instead of dispersions of metal nanoparticles. Thermal characteristics of synthesized precursors were studied by thermogravimetry in an argon atmosphere. Based on the comparison of decomposition temperature, the dimethylamine complex of copper formate was found to be more suitable precursor for the formation of copper layers. Structure and performance of this compound was studied in det
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23

Belich, H., M. A. Santos, and M. T. D. Orlando. "The gauge sector of the SME with Lorentz-symmetry violation by symplectic projector method." Modern Physics Letters A 30, no. 35 (2015): 1550191. http://dx.doi.org/10.1142/s0217732315501916.

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We propose to analyze a modified electromagnetism inspired from the gauge sector of the Standard Model extension (SME). From the point of view of a canonical formulation, we carried out the usual analysis on the constraints structure of the odd sector (Carroll–Field–Jackiw term) and a Maxwell term with an effective metric. This effective metric is obtained by a vectorial decomposition of the CPT-even term, that is absorbed in the ordinary Maxwell term. Using symplectic projector method (SPM), we obtain the dispersions relations and we have verified conditions of stability to determine the vali
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24

Li, Shunbo, Xiao Xiao, Bo Hou, and Weijia Wen. "Green Function Formulism for Electromagnetic Wave Generated in Nanostructured Metamaterial of Finite Thickness: Isotropy and Anisotropy." International Journal of Optics 2012 (2012): 1–19. http://dx.doi.org/10.1155/2012/532316.

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A Green function formulism is developed to calculate the electromagnetic fields generated by sources embedded in nanostructured medium which could be represented by an effective electric permittivity tensor with finite thicknesses. The method begins with the decomposition of the generated mode into the eigenmodes in the medium, which have definite dispersions. To account the interface effect at boundaries, especially the mode conversion at the interface between anisotropic media, mode expansion method is combined into the theoretical framework. Thus, the electromagnetic wave in any given posit
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25

Bontà, Elena Dalla, Roger L. Davies, Ryan C. W. Houghton, Francesco D'Eugenio, Enrico M. Corsini, and Jairo Méndez-Abreu. "Photometric analysis of Abell 1689." Proceedings of the International Astronomical Union 8, S295 (2012): 230. http://dx.doi.org/10.1017/s1743921313004857.

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AbstractWe carried out a photometric analysis of a sample of early-type galaxies in Abell~1689 at z = 0.183, using HST/ACS archive images in the rest-frame V band. We performed a two-dimensional photometric decomposition of each galaxy surface-brightness distribution using the GASP2D fitting algorithm (Méndez-Abreu et al. 2008). We adopted both a Sérsic and de Vaucouleurs law. S0 galaxies were analysed also taking into account a disc component described by an exponential law. The derived photometric parameters, together with the ones previously obtained with the curve of growth method (Houghto
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26

Sizikov, Artem A., Valeriy A. Vlasov, Andrey S. Stoporev, and Andrey Yu Manakov. "Decomposition Kinetics and Self-Preservation of Methane Hydrate Particles in Crude Oil Dispersions: Experiments and Theory." Energy & Fuels 33, no. 12 (2019): 12353–65. http://dx.doi.org/10.1021/acs.energyfuels.9b03391.

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27

Wu, Yongjuan, Rufen Chen, Hui Liu, Yu Wei, and Dong Wu. "Feasibility and mechanism of p-nitrophenol decomposition in aqueous dispersions of ferrihydrite and H2O2 under irradiation." Reaction Kinetics, Mechanisms and Catalysis 110, no. 1 (2013): 87–99. http://dx.doi.org/10.1007/s11144-013-0571-4.

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28

Chang, Jiajia, Xiaoqing Wang, Jian Shao, Xiaomeng Li, Wei Xin, and Yunjun Luo. "Synthesis and Characterization of Environmentally-Friendly Self-Matting Waterborne Polyurethane Coatings." Coatings 10, no. 5 (2020): 494. http://dx.doi.org/10.3390/coatings10050494.

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A series of self-matting waterborne polyurethanes (WPUs) were successfully prepared by introducing hydrophilic units into both soft and hard segments. By employing a polycaprolactone polyol containing carboxylate groups within the polymer chains to provide hydrophilicity directly, the matting performance of WPU films was greatly improved. The chemical structures of the WPU resins were confirmed by FTIR spectroscopy, and the morphology of WPU films was observed by SEM. The parameters of WPU preparation were investigated in detail. It was found that the surface gloss of WPU films as well as the
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29

Gavrilova, Natalia, Maria Myachina, Victor Dyakonov, Victor Nazarov, and Valery Skudin. "Synthesis of Microporous Mo2C-W2C Binary Carbides by Thermal Decomposition of Molybdenum-Tungsten Blues." Nanomaterials 10, no. 12 (2020): 2428. http://dx.doi.org/10.3390/nano10122428.

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Molybdenum and tungsten carbides are perspective catalytic systems. Their activity in many reactions is comparable to the activity of platinum group metals. The development of the synthesis method for of highly dispersed binary molybdenum and tungsten carbides is an important task. Dispersions of molybdenum-tungsten blue were used as a precursor for synthesis of binary molybdenum and tungsten carbides. The synthesis of carbides was carried out by thermal decomposition of molybdenum-tungsten blue xerogels in an inert atmosphere. The binary carbides were characterized by XRD, TGA, SEM and nitrog
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30

Kim, Byung Hoon, Sun-Jae Kim, Minchul Chung, et al. "Bipolar Pulsed Electrical Discharge for Decomposition of Methylene Blue in Aqueous TiO2 Nanoparticle Dispersions." Journal of Nanoscience and Nanotechnology 13, no. 3 (2013): 1966–69. http://dx.doi.org/10.1166/jnn.2013.6972.

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31

Janiak, Christoph. "Ionic Liquids for the Synthesis and Stabilization of Metal Nanoparticles." Zeitschrift für Naturforschung B 68, no. 10 (2013): 1059–89. http://dx.doi.org/10.5560/znb.2013-3140.

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The synthesis and stabilization of metal nanoparticles (M-NPs) from metals, metal salts, metal complexes and metal carbonyls in ionic liquids (ILs) is reviewed. The electrostatic and steric properties of ionic liquids allow for the stabilization of M-NPs without the need of additional stabilizers, surfactants or capping ligands. The synthesis of M-NPs in ILs can be carried out by chemical or electroreduction, thermolysis and photochemical methods including decomposition by microwave or sono-/ultrasound irradiation. Gas-phase syntheses can use sputtering, plasma/glow-discharge electrolysis and
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32

Nikolaeva, Maria E., Andrey V. Nechaev, Elena V. Shmendel, Roman A. Akasov, Mikhail A. Maslov, and Andrey F. Mironov. "New Cysteine-Containing PEG-Glycerolipid Increases the Bloodstream Circulation Time of Upconverting Nanoparticles." Molecules 27, no. 9 (2022): 2763. http://dx.doi.org/10.3390/molecules27092763.

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Upconverting nanoparticles have unique spectral and photophysical properties that make them suitable for development of theranostics for imaging and treating large and deep-seated tumors. Nanoparticles based on NaYF4 crystals doped with lanthanides Yb3+ and Er3+ were obtained by the high-temperature decomposition of trifluoroacetates in oleic acid and 1-octadecene. Such particles have pronounced hydrophobic properties. Therefore, to obtain stable dispersions in aqueous media for the study of their properties in vivo and in vitro, the polyethylene glycol (PEG)-glycerolipids of various structure
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Nikolaeva, Maria E., Andrey V. Nechaev, Elena V. Shmendel, Roman A. Akasov, Mikhail A. Maslov, and Andrey F. Mironov. "New Cysteine-Containing PEG-Glycerolipid Increases the Bloodstream Circulation Time of Upconverting Nanoparticles." Molecules 27, no. 9 (2022): 2763. http://dx.doi.org/10.3390/molecules27092763.

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Upconverting nanoparticles have unique spectral and photophysical properties that make them suitable for development of theranostics for imaging and treating large and deep-seated tumors. Nanoparticles based on NaYF4 crystals doped with lanthanides Yb3+ and Er3+ were obtained by the high-temperature decomposition of trifluoroacetates in oleic acid and 1-octadecene. Such particles have pronounced hydrophobic properties. Therefore, to obtain stable dispersions in aqueous media for the study of their properties in vivo and in vitro, the polyethylene glycol (PEG)-glycerolipids of various structure
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34

Guo, Xiang Yang, Chun Zhen Fan, Xian Sheng Liu, et al. "Rapid In Situ Reactive Sintering and Properties of ZrO2-ZrW2O8 Composites." Advanced Materials Research 535-537 (June 2012): 42–46. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.42.

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ZrO2-ZrW2O8 diphasic composites with controllable coefficients of thermal expansion (CTEs) are synthesized by rapid in-situ reactive sintering with ZrO2 and WO3 as reactants. High density of ZrO2-ZrW2O8 composites without decomposition of ZrW2O8 is obtained with Y2O3 sintering additive. The CTEs of specimen with ZrO2 to ZrW2O8 mass ratio 1:1.0, 1:1.3, 1:1.5 and 1:2.0 are measured to be about 1.20×10−6, 0.31×10−6, -0.78×10−6 and -1.13×10−6 K−1, respectively. Raman mappings demonstrate homogenous dispersions of ZrO2 and ZrW2O8 in the ZrO2-ZrW2O8 composites. In addition to the role as sintering a
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35

Kim, Kyung-Min, Hee-Woong Park, Gyu-Seong Shim, et al. "Mechanical properties and decomposition performance of peelable coating containing UiO-66 catalyst and waterborne silane-terminated polyurethane dispersions." Journal of Materials Science 55, no. 6 (2019): 2604–17. http://dx.doi.org/10.1007/s10853-019-04184-2.

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36

Nahorniak, Mykhailo, Pamela Pasetto, Jean-Marc Greneche, et al. "Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition." Beilstein Journal of Nanotechnology 14 (January 3, 2023): 11–22. http://dx.doi.org/10.3762/bjnano.14.2.

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Different iron oxides (i.e., magnetite, maghemite, goethite, wüstite), particularly nanosized particles, show distinct effects on living organisms. Thus, it is of primary importance for their biomedical applications that the morphology and phase-structural state of these materials are investigated. The aim of this work was to obtain magnetic nanoparticles in a single reactor using Fe(III) acetylacetonate as the initial precursor for the synthesis of Fe(III) oleate or Fe(III) undecylate followed by their thermolysis in situ. We proposed a new approach, according to which the essential magnetite
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37

Postnikov, Eugene B., Elena A. Lebedeva, Andrey Yu Zyubin, and Anastasia I. Lavrova. "The Cascade Hilbert-Zero Decomposition: A Novel Method for Peaks Resolution and Its Application to Raman Spectra." Mathematics 9, no. 21 (2021): 2802. http://dx.doi.org/10.3390/math9212802.

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Raman spectra of biological objects are sufficiently complex since they are comprised of wide diffusive spectral peaks over a noisy background. This makes the resolution of individual closely positioned components a complicated task. Here we propose a method for constructing an approximation of such systems by a series, respectively, to shifts of the Gaussian functions with different adjustable dispersions. It is based on the coordination of the Gaussian peaks’ location with the zeros of the signal’s Hilbert transform. The resolution of overlapping peaks is achieved by applying this procedure
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38

Shoikhedbrod, M. "Automated Process Control System for the Production of Advanced Foam Materials Using a Programmable Logic Controller." Journal of Control System and Control Instrumentation 8, no. 3 (2022): 1–7. http://dx.doi.org/10.46610/jocsaci.2022.v08i03.001.

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Obtaining foam materials with high physical and mechanical properties is one of the most important tasks, associated with the needs of the chemical industry, medicine, mechanical engineering and space technology. Known methods for producing foam materials create foam materials by foaming aqueous dispersions of high polymers, using thermal decomposition of organic and inorganic substances, by using radiation degradation of a thermoplastic polymer; by foaming polyurethane compositions by injection of condensed hydrogen under high pressure and others. All these methods, on the one hand, are uneco
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39

La Porta, Felipe A., and Sofia Masi. "Solvent-Mediated Structural Evolution Mechanism from Cs4PbBr6 to CsPbBr3 Crystals." Nanomanufacturing 1, no. 2 (2021): 67–74. http://dx.doi.org/10.3390/nanomanufacturing1020007.

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The study of the solvent-mediated structural evolution mechanism of the Cs4PbBr6 powders prepared using the solvothermal method is presented. The Cs4PbBr6 powders with a rhombohedral structure and an intense green emission (i.e., mainly due to the presence of complex defect states in the forbidden gap), which is stable in its solid-state form, but a distinct behavior is observed in different dispersions, easily detectable when irradiated with ultraviolet (UV) light. Depending on the polarity of the solvent, a change in the emission color from green to red is observed, easily detectable when ir
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40

Kudryavtsev, P. G. "Main routes of the porous composite materials creation." Nanotechnologies in Construction A Scientific Internet-Journal 12, no. 5 (2020): 256–69. http://dx.doi.org/10.15828/2075-8545-2020-12-5-256-269.

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This paper is devoted to an overview of the main ways of creating porous composite materials. Porous materials are solids containing free space in the form of cavities, channels, or pores, which determine the presence of an internal interfacial surface. The analysis of the general methods of obtaining porous materials. A deposition is one of the most common methods for producing porous materials. Thermal decomposition, as a method used to obtain porous oxide materials by thermal decomposition of various compounds. Hydrothermal synthesis is widely used to produce zeolites. Selective dissolution
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41

Suzuki, Kyosuke, Kohsaku Kawakami, Masafumi Fukiage, et al. "Relevance of Liquid-Liquid Phase Separation of Supersaturated Solution in Oral Absorption of Albendazole from Amorphous Solid Dispersions." Pharmaceutics 13, no. 2 (2021): 220. http://dx.doi.org/10.3390/pharmaceutics13020220.

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Amorphous solid dispersion (ASD) is one of the most promising formulation technologies for improving the oral absorption of poorly soluble drugs, where the maintenance of supersaturation plays a key role in enhancing the absorption process. However, quantitative prediction of oral absorption from ASDs is still difficult. Supersaturated solutions can cause liquid-liquid phase separation through the spinodal decomposition mechanism, which must be adequately comprehended to understand the oral absorption of drugs quantitatively. In this study, albendazole (ALZ) was formulated into ASDs using thre
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42

KOBUS, JOANNA. "Prevention of the microbiological decomposition of aqueous dispersions of water-soluble polymers and paints and of coatings prepared from them." Polimery 36, no. 03 (1991): 97–101. http://dx.doi.org/10.14314/polimery.1991.097.

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43

Rajamathi, Jacqueline T., Anthony Arulraj, N. Ravishankar, James Arulraj, and Michael Rajamathi. "Delamination of Surfactant-Intercalated Brucite-Like Hydroxy Salts of Cobalt and Copper and Solvothermal Decomposition of the Resultant Colloidal Dispersions." Langmuir 24, no. 19 (2008): 11164–68. http://dx.doi.org/10.1021/la801730u.

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44

Shibata, Nori, Kimitaka Watanabe, Masaharu Ohashi, Ryo Maruyama, and Kazuhiko Aikawa. "Diagnosis of modal and chromatic dispersions for the LP01 and LP11 modes through temporal decomposition by means of Fourier transform." Optics Letters 45, no. 17 (2020): 4750. http://dx.doi.org/10.1364/ol.396444.

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45

Gorokhovsky, Alexander, Natalia Morozova, Gleb Yurkov, et al. "Catalytic Decomposition of H2O2 in the Aqueous Dispersions of the Potassium Polytitanates Produced in Different Conditions of Molten Salt Synthesis." Molecules 28, no. 13 (2023): 4945. http://dx.doi.org/10.3390/molecules28134945.

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It is shown that the potassium polytitanate powder (PPT) synthesized at 500 °C via the treatment of powdered TiO2 (rutile) in molten mixtures of KOH and KNO3 is a cheap and effective catalyst of H2O2 chemical decomposition in aqueous solutions. At the same time, the PPT catalytic activity strongly depends on the [TiO2]:[KOH]:[KNO3] weight ratio in the mixture used for the synthesis, increasing with [KNO3] in the order of PPT (30:30:40) &lt; PPT (30:50:20) &lt; PPT (30:70:0). The obtained results are explained by increased [Ti3+] in the PPT structure (XPS data), which is grown in this order fro
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46

Seyyed Roohollah, Masoomi, Azizi Mostafa, Aghlmand Reza, Gheibi Mohammad, and Kian Zahra. "Simulating the dispersion of poisonous organic chemical compounds in wastewater treatment process through the active sludge method using the TOXChem model." Annals of Biomedical Science and Engineering 5, no. 1 (2021): 025–31. http://dx.doi.org/10.29328/journal.abse.1001014.

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Naturally, microorganisms decompose the organic material existing in nature, both in the presence or absence of oxygen. The majority of materials such as poisonous chemical compounds, heavy metals, would prevent the treatment process from taking place, lead to the entry of these contaminants into the environment results in the emergence of numerous diseases. In the present study, using the TOXChem4.1 simulation model, attempts were made to simulate a wastewater treatment plant and then assess the dispersions of contaminants including 1,2-Dimethylnaphthalene, 1,3-Dinitropyrene, 1,6-Dimethylnaph
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47

Sullivan, R. C., T. Thornberry, and J. P. D. Abbatt. "Ozone decomposition kinetics on alumina: effects of ozone partial pressure, relative humidity and repeated oxidation cycles." Atmospheric Chemistry and Physics 4, no. 5 (2004): 1301–10. http://dx.doi.org/10.5194/acp-4-1301-2004.

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Abstract. The room temperature kinetics of gas-phase ozone loss via heterogeneous interactions with thin alumina films has been studied in real-time using 254nm absorption spectroscopy to monitor ozone concentrations. The films were prepared from dispersions of fine alumina powder in methanol and their surface areas were determined by an in situ procedure using adsorption of krypton at 77K. The alumina was found to lose reactivity with increasing ozone exposure. However, some of the lost reactivity could be recovered over timescales of days in an environment free of water, ozone and carbon dio
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48

Pavoni, Lucia, Diego Romano Perinelli, Giulia Bonacucina, Marco Cespi, and Giovanni Filippo Palmieri. "An Overview of Micro- and Nanoemulsions as Vehicles for Essential Oils: Formulation, Preparation and Stability." Nanomaterials 10, no. 1 (2020): 135. http://dx.doi.org/10.3390/nano10010135.

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The interest around essential oils is constantly increasing thanks to their biological properties exploitable in several fields, from pharmaceuticals to food and agriculture. However, their widespread use and marketing are still restricted due to their poor physico-chemical properties; i.e., high volatility, thermal decomposition, low water solubility, and stability issues. At the moment, the most suitable approach to overcome such limitations is based on the development of proper formulation strategies. One of the approaches suggested to achieve this goal is the so-called encapsulation proces
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49

Madejová, J., S. Andrejkovičová, J. Bujdák, et al. "Characterization of products obtained by acid leaching of Fe-bentonite." Clay Minerals 42, no. 4 (2007): 527–40. http://dx.doi.org/10.1180/claymin.2007.042.4.09.

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AbstractThis study focused on the structure and physical properties of acid-treated bentonite L45 from the Lieskovec deposit (Slovakia). New applications of near infrared and visible spectroscopies were used to follow Fe-montmorillonite dissolution and layer-charge reduction. Progressive dissolution of L45 results in the formation of a protonated amorphous silica phase. The OH overtone at 7312 cm–1 revealed the creation of Si–OH groups in the mildly treated samples. The area of the Si–O–Moct band, as obtained by a peak-fitting procedure, is a sensitive indicator of the changes in the octahedra
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50

Abida, Murtaza*1 Tayyab Ali2 &. Khaja Zaheerudeen3. "SYNTHESIS AND CHARACTERIZATION OF ALUMINUM OXIDEDISPERSED POLYSTYRENE COMPOSITE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, no. 2 (2018): 616–18. https://doi.org/10.5281/zenodo.1184028.

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Nanomaterials can be incorporated into polymeric coatings to enable significant improvement in targeted properties, i.e., scratch resistance, UV resistance, etc. Commercialprocessing methods have been developed to surface treat nanoparticles to render compatibility between the nanoparticle and polymer matrix. In addition, commercial processes to disperse the surface treated nanoparticles have been developed. These integrated technologies allow transparent coatings containing nanoparticles to be formed in a wide range of resin formulations. This paper will address the preparation and analytical
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