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Journal articles on the topic 'Microconcentrator'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Christenson, R. H., M. E. Russell, K. T. Gubar, L. M. Silverman, and G. C. Ebers. "Oligoclonal banding in cerebrospinal fluid assessed by electrophoresis on agarose after centrifugal sample concentration through a microconcentrator membrane." Clinical Chemistry 31, no. 10 (1985): 1734–36. http://dx.doi.org/10.1093/clinchem/31.10.1734.

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Abstract We describe use of a microconcentrator membrane with a 30 000-Da cutoff for treatment of cerebrospinal fluid (CSF) specimens before detection of oligoclonal bands by electrophoresis on agarose. After centrifugation at 2000 X g for 25 min, 0.5-, 1.0-, and 2.0-mL aliquots of CSF were concentrated 15-, 25-, and 40-fold. Analytical recovery of immunoglobulins G and A from the microconcentrators was about 90% (CV 5-8%). We found good correlation between results by this method and by a silver-stain procedure in a study comparing oligoclonal banding in CSF from multiple sclerosis and control

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2

Manea, Elena, Catalin Parvulescu, Munizer Purica, Elena Budianu, and Constantin Tibeica. "Optical Microconcentrator System for Enhancing Solar Cell Photovoltaic Performances." Defect and Diffusion Forum 369 (July 2016): 65–70. http://dx.doi.org/10.4028/www.scientific.net/ddf.369.65.

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In this paper, we present two optical microconcentrator systems consisting of an array of microlenses formed with an intermediate layer deposited between a textured glass plate and the front surface of a silicon solar cell and polydimethylsiloxane (PDMS) microlenses based on replication of molds etched on glass. The optical coupling microlenses are fabricated using simple photolithography techniques that make the design compatible with silicon technology and large-scale manufacturing.We experimented with a honeycomb texturization on Corning glass plate having an area of 2x2 cm2. A wet etching

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3

Hsu, Chia-Chun, Yan-Chang Lee, and Wen-Hsin Hsieh. "Exterior-electrode electrically driven microconcentrator." ELECTROPHORESIS 39, no. 19 (2018): 2460–70. http://dx.doi.org/10.1002/elps.201800099.

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4

Gadish, Nitzan, and Joel Voldman. "High-Throughput Positive-Dielectrophoretic Bioparticle Microconcentrator." Analytical Chemistry 78, no. 22 (2006): 7870–76. http://dx.doi.org/10.1021/ac061170i.

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5

Kim, Minhee, and Somenath Mitra. "A microfabricated microconcentrator for sensors andgas chromatography." Journal of Chromatography A 996, no. 1-2 (2003): 1–11. http://dx.doi.org/10.1016/s0021-9673(03)00560-0.

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6

Moore, James E., Kenneth J. Schmieder, Wolfgang Wagner, and Matthew P. Lumb. "Strategies for defect-tolerant microconcentrator photovoltaic modules." Journal of Photonics for Energy 9, no. 01 (2019): 1. http://dx.doi.org/10.1117/1.jpe.9.014501.

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7

Hsu, Chia-Chun, Yan-Chang Lee, and Wen-Hsin Hsieh. "Front Cover: Exterior-electrode electrically driven microconcentrator." ELECTROPHORESIS 39, no. 19 (2018): NA. http://dx.doi.org/10.1002/elps.201870151.

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8

Lee, Hsu-Yi, and Joel Voldman. "Optimizing Micromixer Design for Enhancing Dielectrophoretic Microconcentrator Performance." Analytical Chemistry 79, no. 5 (2007): 1833–39. http://dx.doi.org/10.1021/ac061647q.

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9

Piccinni, Marco, Davide Carrea, Sawssen Slimani, et al. "Empowering Advanced Photovoltaic Pioneers: A Bilateral Italy-USA Project." ECS Meeting Abstracts MA2024-02, no. 19 (2024): 1753. https://doi.org/10.1149/ma2024-02191753mtgabs.

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The sun bathes our planet with far more energy than humankind will possibly ever need (> 8,000 times the current demand). Yet, sustainable energy provision is among the most pressing challenges faced today. In order to unlock the vast potential of clean solar energy, we need disruptive technologies capable of efficiently harvesting sunlight, while being deployable at unprecedented scales. Available commercial photovoltaics (PV) can hardly cope sustainably with the sheer scale of this challenge. Silicon solar panels are the major commercial PV, they are based on a very Earth-abundant element

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10

Danilov, V. I., V. V. Gorbatenko, and L. V. Danilova. "Kinetics of Lüders deformation as an autowave process." Izvestiya. Ferrous Metallurgy 65, no. 4 (2022): 261–67. http://dx.doi.org/10.17073/0368-0797-2022-4-261-267.

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The authors investigated the nature and kinetics of the moving fronts of localized deformation, which are formed at the elastoplastic transition in materials with dislocation and martensitic micromechanisms of plastic deformation under active tension at different velocity. Digital image correlation was used for registration and quantitative specification of front movement. Attained results were discussed under synergistic approach. A deformed subject is considered as open and far-from-equilibrium system (active medium) containing distributed potential energy source stress, which are microconce

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11

Vivar, M., V. Everett, M. Fuentes, et al. "Initial field performance of a hybrid CPV-T microconcentrator system." Progress in Photovoltaics: Research and Applications 21, no. 8 (2012): 1659–71. http://dx.doi.org/10.1002/pip.2229.

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12

Zheng, Lina, Pramod Kulkarni, Konstantinos Zavvos, Huayan Liang, M. Eileen Birch, and Dionysios D. Dionysiou. "Characterization of an aerosol microconcentrator for analysis using microscale optical spectroscopies." Journal of Aerosol Science 104 (February 2017): 66–78. http://dx.doi.org/10.1016/j.jaerosci.2016.11.007.

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13

Kelner, M. J., and N. M. Alexander. "Rapid separation and identification of myoglobin and hemoglobin in urine by centrifugation through a microconcentrator membrane." Clinical Chemistry 31, no. 1 (1985): 112–14. http://dx.doi.org/10.1093/clinchem/31.1.112.

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Abstract Urinary myoglobin (Mr = 16 500) is readily separated from hemoglobin (Mr = 64 000) by centrifugation through a microconcentrator membrane with a 30 000-Da cutoff. Myoglobin, but not hemoglobin, will pass through the membrane, after which each fraction may be separately analyzed by spectrophotometry. This technique is advantageous over direct spectrophotometry of urine because it is not restricted to analyzing the oxy forms of these hemoproteins and obviates the difficulty of discriminating small (3 nm) differences in their spectra. In addition, this method of separation is more comple

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14

Yoon, Jongseung, Alfred J. Baca, Sang-Il Park, et al. "Ultrathin silicon solar microcells for semitransparent, mechanically flexible and microconcentrator module designs." Nature Materials 7, no. 11 (2008): 907–15. http://dx.doi.org/10.1038/nmat2287.

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15

Colombara, Diego, Davide Peddis, Chiara Lambruschini, et al. "Advances in Reusable Mask Patterning." ECS Meeting Abstracts MA2025-01, no. 25 (2025): 3130. https://doi.org/10.1149/ma2025-01253130mtgabs.

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The sun bathes our planet with far more energy than humankind will possibly ever need (> 8,000 times the current demand). Yet, sustainable energy provision is among the most pressing challenges faced today. In order to unlock the vast potential of clean solar energy, we need disruptive technologies capable of efficiently harvesting sunlight, while being deployable at unprecedented scales. Available commercial photovoltaics (PV) can hardly cope sustainably with the sheer scale of this challenge. Silicon solar panels are the major commercial PV, they are based on a very Earth-abundant element

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16

Tran-Minh, Nhut, Tao Dong, Qianhua Su, Zhaochu Yang, Henrik Jakobsen, and Frank Karlsen. "Design and optimization of non-clogging counter-flow microconcentrator for enriching epidermoid cervical carcinoma cells." Biomedical Microdevices 13, no. 1 (2010): 179–90. http://dx.doi.org/10.1007/s10544-010-9483-5.

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17

Grover, D. S., M. G. Atta, J. A. Eustace, T. S. Kickler, and D. M. Fine. "Lack of clinical utility of urine myoglobin detection by microconcentrator ultrafiltration in the diagnosis of rhabdomyolysis." Nephrology Dialysis Transplantation 19, no. 10 (2004): 2634–38. http://dx.doi.org/10.1093/ndt/gfh422.

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18

Dong, Tao, Zhaochu Yang, Qianhua Su, et al. "Integratable non-clogging microconcentrator based on counter-flow principle for continuous enrichment of CaSki cells sample." Microfluidics and Nanofluidics 10, no. 4 (2010): 855–65. http://dx.doi.org/10.1007/s10404-010-0717-x.

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19

Gama, Fernanda Gomes Velasque, Aureo Evangelista Santana, Eugênio de Campos Filho, and Cláudia Aparecida da Silva Nogueira. "Agarose gel electrophoresis of cerebrospinal fluid proteins of dogs after sample concentration using a membrane microconcentrator technique." Veterinary Clinical Pathology 36, no. 1 (2007): 85–88. http://dx.doi.org/10.1111/j.1939-165x.2007.tb00187.x.

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20

Longway, S. R., and N. M. Alexander. "Using filtrates of urine centrifuged through a microconcentrator membrane to distinguish false and true positives for protein by sulfosalicylic acid precipitation." Clinical Chemistry 31, no. 10 (1985): 1773–74. http://dx.doi.org/10.1093/clinchem/31.10.1773.

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21

Curran, Seamus, Jamal Talla, Sampath Dias, and James Dewald. "Microconcentrator photovoltaic cell (the m-C cell): Modeling the optimum method of capturing light in an organic fiber based photovoltaic cell." Journal of Applied Physics 104, no. 6 (2008): 064305. http://dx.doi.org/10.1063/1.2973155.

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22

Knuesel, Robert J., and Heiko O. Jacobs. "Self-Tiling Monocrystalline Silicon; a Process to Produce Electrically Connected Domains of Si and Microconcentrator Solar Cell Modules on Plastic Supports." Advanced Materials 23, no. 24 (2011): 2727–33. http://dx.doi.org/10.1002/adma.201004533.

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23

Knuesel, Robert J., and Heiko O. Jacobs. "Self-Assembly: Self-Tiling Monocrystalline Silicon; a Process to Produce Electrically Connected Domains of Si and Microconcentrator Solar Cell Modules on Plastic Supports (Adv. Mater. 24/2011)." Advanced Materials 23, no. 24 (2011): 2700. http://dx.doi.org/10.1002/adma.201190087.

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24

Shepovalova, Olga, Andrey Izmailov, Yakov Lobachevsky, and Alexey Dorokhov. "High-Efficiency Photovoltaic Equipment for Agriculture Power Supply." Agriculture 13, no. 6 (2023): 1234. http://dx.doi.org/10.3390/agriculture13061234.

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Developing an energy supply based on resources whose use does not spoil the noosphere and the creation of such energy supply of efficient equipment whose operation does not cause any damage to nature and man is an urgent task. The need for such an approach is especially relevant and noticeable in agriculture. This article presents the final results of complex studies of new PV devices and PV systems based on them. Considered in the article are the best solutions we propose to improve PV equipment and make it more attractive for agricultural consumers. The developed vertical and planar high-vol

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25

Petroni, D., C. Pastore, A. Lasa, J. Soler, M. Baiget, and J. Nomdedéu. "Rapid sequencing protocol using microconcentrators." Trends in Genetics 12, no. 5 (1996): 167–68. http://dx.doi.org/10.1016/s0168-9525(96)90062-1.

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26

Sambrook, Joseph, and David W. Russell. "Concentrating and Desalting Nucleic Acids with Microconcentrators." Cold Spring Harbor Protocols 2006, no. 1 (2006): pdb.prot4457. http://dx.doi.org/10.1101/pdb.prot4457.

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27

Sagaradze, V. V., N. V. Kataeva, V. A. Zavalishin, V. A. Shabashov, K. A. Kozlov, and M. F. Klyukina. "Conditions for the Violation of Concentrational Homogeneity of Fe–Ni Invar Alloys." Physics of Metals and Metallography 122, no. 10 (2021): 969–75. http://dx.doi.org/10.1134/s0031918x21100100.

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Abstract Conditions for the formation of microconcentration inhomogeneities in Fe–Ni alloys, which can decrease their invar characteristics, are determined. The nickel separation can be reached in the course of short-term annealing as a result of deformation-induced nickel segregation, nickel redistribution between martensite and austenite and between ferrite and austenite as well.

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28

Korech, Omer, Jeffrey M. Gordon, Eugene A. Katz, Daniel Feuermann, and Naftali Eisenberg. "Dielectric microconcentrators for efficiency enhancement in concentrator solar cells." Optics Letters 32, no. 19 (2007): 2789. http://dx.doi.org/10.1364/ol.32.002789.

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29

Almazán, Fernando, Ismael Pellejero, Alberto Morales, et al. "Zeolite based microconcentrators for volatile organic compounds sensing at trace-level: fabrication and performance." Journal of Micromechanics and Microengineering 26, no. 8 (2016): 084010. http://dx.doi.org/10.1088/0960-1317/26/8/084010.

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30

Donati, Silvano, Giuseppe Martini, and Michele Norgia. "Microconcentrators to recover fill-factor in image photodetectors with pixel on-board processing circuits." Optics Express 15, no. 26 (2007): 18066. http://dx.doi.org/10.1364/oe.15.018066.

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31

Pickles, A. J., N. Peers, W. R. Robertson, and A. Lambert. "Different isoforms of human pituitary thyroid-stimulating hormone have different relative biological activities." Journal of Molecular Endocrinology 9, no. 3 (1992): 251–56. http://dx.doi.org/10.1677/jme.0.0090251.

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ABSTRACT The relationship between the immunological and biological activities of thyroid-stimulating hormone (TSH) isoforms present in the three human pituitary preparations 68/38 (1st IRP), 80/558 (2nd IRP) and 63/14 (MRC Research Standard A) was investigated. The isoforms were separated by chromatofocusing. Six peaks of immunoactivity were detected in 80/558, with pI values (means±s.e.m.) of 6·6±0·1, 6·2±0·1, 5·9±0·1, 5·5±0·1, 5·2±0·1 and 4·9±0·1. Four peaks, with pi values of 6·8±0·1, 5·9±0·1, 5·5±0·1 and 5·2±0·1, were observed for 68/38. Standard 63/14 had five peaks, with pI values of 6·9

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32

Othman, Mohamed I. A., Samia M. Said, Rania A. Fathy, and Mohamed G. Eldemerdash. "A new three-phase-lag model for magneto-thermoelastic diffusive medium with microconcentration." International Communications in Heat and Mass Transfer 161 (February 2025): 108477. https://doi.org/10.1016/j.icheatmasstransfer.2024.108477.

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33

Li, Jiong, Yijin Wang, Zuhong Lu, and Mansun Chan. "Enhancing deoxyribonucleic acid (DNA) detection sensitivity through microconcentration on patterned fluorocarbon polymer surface." Analytica Chimica Acta 571, no. 1 (2006): 34–39. http://dx.doi.org/10.1016/j.aca.2006.04.044.

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34

Sindhu, Senthamil, and Nithya Jagannathan. "Saliva: A Cutting Edge in Diagnostic Procedures." Journal of Oral Diseases 2014 (May 26, 2014): 1–8. http://dx.doi.org/10.1155/2014/168584.

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The ability to monitor the health and disease status of the patient through saliva is a highly desirable goal for the health professionals. Considering the microconcentration of salivary constituents, saliva is explored to be diagnostic tool as it also meets the demands for an inexpensive, noninvasive and easy to use screening method. The incorporation of salivary diagnostics into clinical practice is gaining reality and will be of diagnostic value in the prospective future. The investigative use of saliva is not being applied only in dental health but also in various other systemic disorders.

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35

Bruce, Jeffrey N., Gregory R. Criscuolo, Marsha J. Merrill, Ross R. Moquin, J. Bob Blacklock, and Edward H. Oldfield. "Vascular permeability induced by protein product of malignant brain tumors: inhibition by dexamethasone." Journal of Neurosurgery 67, no. 6 (1987): 880–84. http://dx.doi.org/10.3171/jns.1987.67.6.0880.

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✓ Serum-free conditioned medium derived from confluent monolayer cultures of malignant human astroglial tumors contains a substance that rapidly increases capillary vascular permeability after intradermal injection into guinea pigs. Accumulation of vascular permeability factor (VPF) activity occurs with increasing duration of tumor incubation in vitro. Expression of this activity is inhibited by incubation of cell cultures with cycloheximide or dexamethasone. This VPF is an acid-stable heat-labile macromolecule that is inactivated by trypsin and pepsin and binds immobilized heparin. Activity i

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36

Maksymovyc, Nelly, Ludmila Oleksenko, Georgiy Fedorenko, and Ganna Arinarkhova. "Semiconductor Sensor With Loaded SnO2 Nanoparticles For Early Warning Of Indoor Fires." Methods and Objects of Chemical Analysis Vol. 14, No.1 (2019): 37–42. http://dx.doi.org/10.17721/moca.2019.37-42.

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Nanosized tin dioxide material with an average particle size of 10-11 nm was prepared by a sol-gel method. The material has been tested as a gas sensitive layer of a semiconductor sensor. Platinum was introduced into the gas sensitive layer to increase the sensor response to hydrogen. It was shown that the Pt-containing sensor has high sensitivity to hydrogen: its electrical resistance changes in 9.2 times in the presence of 22 ppm H2 in air. It was demonstrated that the sensor applicable to a wide range of H2 measurements in air (3-935 ppm) and has a fast dynamic response. The sensor demonstr

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37

Siva Kumar Gunda, Naga, Subir Bhattacharjee, and Sushanta K. Mitra. "Study on the use of dielectrophoresis and electrothermal forces to produce on-chip micromixers and microconcentrators." Biomicrofluidics 6, no. 3 (2012): 034118. http://dx.doi.org/10.1063/1.4749827.

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38

Maruschak, Pavlo, Volodymyr Dzyura, Olegas Prentkovskis, Iaroslav Lytvynenko, and Myroslava Polutrenko. "Microdefects of Biocorroded Pipe Steel Surfaces and Safety Assessment of Localized Stress Concentrators." Metals 10, no. 7 (2020): 852. http://dx.doi.org/10.3390/met10070852.

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The effect of sulfate-reducing bacteria (SRB) on the corrosion of steel 20 was investigated. Results demonstrated that the chemical composition of corrosion products, the corrosion rate, and corrosion type were altered due to the adherence of SRB and the subsequent formation of biofilm on the steel 20 surface. The micromechanisms of biocorrosion damage of specimens from pipe steel 20 were quantified on the basis of the microgeometry of the degraded surface and the localization parameters of corrosive stress microconcentrators. Stress concentrators in the vicinity of the micro-cuts, which are t

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39

Balkanska, Ralitsa, Elisaveta Mladenova, and Irina Karadjova. "Quantification of Selected Trace and Mineral Elements in Royal Jelly from Bulgaria by Icp-Oes and Etaas." Journal of Apicultural Science 61, no. 2 (2017): 223–32. http://dx.doi.org/10.1515/jas-2017-0021.

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Abstract The objective of the present study was to investigate selected trace and mineral elements in Royal Jelly (RJ) from Bulgaria. A total of 30 RJ samples were included in the study. The analytical procedure consisted of the microwave digestion of the RJ samples with nitric acid followed by instrumental measurement. Concentrations of Al, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, P, Sr and Zn were determined using inductively coupled plasma optical emission spectroscopy (ICP-OES), while As, Cd, Co, Ni and Pb were determined by electrothermal atomic absorption spectrometry (ETAAS). Our results show

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40

Othman, Mohamed I. A., Samia M. Said, Rania A. Fathy, and Mohamed G. Eldemerdash. "Effect of mechanical force on a rotating diffusive-thermoelastic solid with microconcentration via Moore-Gibson-Thompson theory." International Communications in Heat and Mass Transfer 162 (March 2025): 108597. https://doi.org/10.1016/j.icheatmasstransfer.2025.108597.

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41

Culty, M., H. A. Nguyen, and C. B. Underhill. "The hyaluronan receptor (CD44) participates in the uptake and degradation of hyaluronan." Journal of Cell Biology 116, no. 4 (1992): 1055–62. http://dx.doi.org/10.1083/jcb.116.4.1055.

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The hyaluronan receptor belongs to the polymorphic family of CD44 glycoproteins, which have been implicated in a variety of cellular functions including adhesion to hyaluronan and collagen, the binding of lymphocytes to high endothelial cells during extravasation, and conferring metastatic potential to carcinoma cells. Here, we demonstrate that the receptor also participates in the uptake and degradation of hyaluronan by both transformed fibroblasts (SV-3T3 cells) and alveolar macrophages. These cells were incubated with isotopically labeled hyaluronan for various periods of time, and the exte

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42

Yakovleva, S. P., and S. N. Makharova. "Fractographic diagnostics of technical objects fractured when operating in the North." Industrial laboratory. Diagnostics of materials 86, no. 6 (2020): 40–47. http://dx.doi.org/10.26896/1028-6861-2020-86-6-40-47.

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Fractographic diagnostics of accidental damage provides data of expert importance which can be used in developing recommendations regarding of accident prevention, improving the reliability and performance of mechanical engineering products and structures in various operating conditions. The goal of the study is fractographic diagnostics of the nature and causes of premature destruction of technical devices and facilities operating in climatic conditions of the North and being the sources of increased technogenic danger, i.e., an automobile gas cylinder and a wind power plant. Using the basic

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43

Bartolini, Desirée, Maria Antonietta Grignano, Marta Piroddi, et al. "Induction of Vesicular Trafficking and JNK-Mediated Apoptotic Signaling in Mononuclear Leukocytes Marks the Immuno-Proteostasis Response to Uremic Proteins." Blood Purification 52, no. 9-10 (2023): 737–50. http://dx.doi.org/10.1159/000533309.

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<b><i>Introduction:</i></b> Uremic retention solutes have been alleged to induce the apoptotic program of different cell types, including peripheral blood mononuclear leukocytes (PBL), which may contribute to uremic leukopenia and immune dysfunction. <b><i>Methods:</i></b> The molecular effects of these solutes were investigated in uremic PBL (u-PBL) and mononuclear cell lines (THP-1 and K562) exposed to the high molecular weight fraction of uremic plasma (u-HMW) prepared by in vitro ultrafiltration with 50 kDa cut-off microconcentrators. <b&g

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44

Adjamskiy, Sergey, Rostislav Podolskyi, and Ganna Kononenko. "Investigation of plastic properties of AISI 316l steel by method of registration of macrolocalization fields." System technologies 4, no. 135 (2021): 3–11. http://dx.doi.org/10.34185/1562-9945-4-135-2021-01.

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Selective laser melting is one of the modern methods of manufacturing parts in the production of machine-building equipment, a special place is occupied by complex technological processes used in the manufacture of high-load units of pneumatic-hydraulic system from heat-resistant alloys. The research was carried out on samples made of powder material - stainless steel AISI 316L martensite class. Metallographic studies showed that the density of the sample is 99.83%, the structure of the samples is a martensitic structure of equilibrium constructed tracks. Tests to determine the mechanical prop

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45

Kaverinsky, V. V., G. A. Baglyuk, A. I. Trotsan, and Z. P. Sukhenko. "Increasing the ductility of the Al-Si alloy with low silicon content by deformation-heat treatment." Metaloznavstvo ta obrobka metalìv 97, no. 1 (2021): 46–52. http://dx.doi.org/10.15407/mom2021.01.046.

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A method of deformation-heat treatment is considered for Al-Si alloy with 4.5 % silicon, which consists in a series of small hot deformations with intermediate annealing. The proposed method allows one to achieve grinding and spheroidization of silicon inclusions, which in the cast state have the form of lamellar excreta at the grain boundaries and significantly reduce the plasticity of the material. Spheroidization, grinding and mixing of inclusions that are achieved during this deformation-heat treatment lead to significantly increase the ductility of the alloy without loss of hardness. The

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46

Gresham, H. D., L. T. Clement, J. E. Lehmeyer, F. M. Griffin, and J. E. Volanakis. "Stimulation of human neutrophil Fc receptor-mediated phagocytosis by a low molecular weight cytokine." Journal of Immunology 137, no. 3 (1986): 868–75. http://dx.doi.org/10.4049/jimmunol.137.3.868.

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Abstract Human neutrophil Fc receptor-mediated phagocytosis can be markedly enhanced by a low m.w. (less than 10,000) heat-labile cytokine(s) derived from specifically stimulated human mononuclear cells and from a human T cell line, MO(t). PMN incubated with supernatant from control mononuclear leukocyte (MNL) culture bound EIgG (percentage of rosettes = 73.7% +/- 7.1) but did not ingest the attached targets (phagocytic index, PI = 40.7 +/- 9.5) as efficiently as PMN incubated with supernatant from adherent MNL, which had ingested EIgG and were then cocultured with nonadherent MNL (PI = 264.3

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47

Chernikov, S. N., and O. Yu Rastegaev. "Determination of O-isobutylmethylphosphonate in industrial emissions by gas chromatography using pulsating flame photometric detector." Industrial laboratory. Diagnostics of materials 91, no. 1 (2025): 24–29. https://doi.org/10.26896/1028-6861-2025-91-1-24-29.

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A procedure for gas chromatographic determination of O-isobutylmethylphosphonate micro-quantities in industrial emissions with a concentration range from 0.5 to 50 mg/m3 has been developed. The target analyte was collected and concentrated using an aspirator of the required volume of the test medium taken from sources of industrial emissions through sampling tubes equipped with ready-made filter materials, two layers of filters of the PFC (Petryanova filter cloth) type, 12 mm in diameter, two layers of filters of the appropriate size, washed in ethyl alcohol and dried in air, made of dense cot

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Val'kov, Alexander V., and Nadezhda D. Khmelevskaya. "EXTRACTION OF RARE-EARTH ELEMENTS BY MIXES OF ISOMERS OF TRIBUTYLPHOSPHATE WITH NITRATE TRIALKYLMETHYLAMMONIUM." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 7 (2018): 55. http://dx.doi.org/10.6060/ivkkt.20186107.5676.

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Results of studying of extraction of nitrates of rare-earth elements (REE) and trialkylmetylammoniya nitrate (TAMAN) are given by mixes of isomers of tributyl phosphate (TBP). Tri-iso-butylphosphate and tri - sec-butylphosphate are investigated as isomers of normal tributylphosphate. The water phase contained 8 mol/dm3 nitrate of ammonium and 5.10-4 mol/dm3 of neodymium nitrate at рН = 2-3. The content of extractants in isomolar series was varied in the range of 0-0.3 mol/dm3. It was established that synergistic effect decreases in a series of TBP> TIBP> TvtBP. Synergistic effect is calc

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Nikolaieva, Y. U., and M. G. Levin. "ABOUT THE POSSIBILITY OF CONTAMINATION OF ANALYTICAL SAMPLES DURING QUALITY CONTROL OF MEDICINES AND WORK WITHIN THE SAME LABORATORY ROOM WITH DIFFERENT SUBSTANCES." Клінічна та профілактична медицина 4, no. 22 (2022): 65–72. http://dx.doi.org/10.31612/2616-4868.4(22).2022.10.

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The aim of the stady. To determine the concentration of diclofenac sodium in the air of the working area within the same room in order to determine the possible contamination of the sample being analyzed, when simultaneously working with different substances of medicinal products. Materials and methods. Air sampling was carried out using a TYPHOON-S4 electric aspirator for 30 minutes at a speed of 20 l/min. The test to determine the concentration of diclofenac sodium in air was carried out by concentrating the analytical sample with regard to the microconcentration of the substance by th

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50

"New high recovery microconcentrator." Membrane Technology 1993, no. 43 (1993): 3. http://dx.doi.org/10.1016/0958-2118(93)90120-b.

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