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Статті в журналах з теми "Flow field flow fractionation (Fl-FFF)":
Kim, Suhan, Sungyun Lee, Chung-Hwan Kim, and Jaeweon Cho. "A new membrane performance index using flow-field flow fractionation (fl-FFF)." Desalination 247, no. 1-3 (October 2009): 169–79. http://dx.doi.org/10.1016/j.desal.2008.12.022.
Lim, Seongbeen, Sangyoup Lee, Soohoon Choi, Jihee Moon, and Seungkwan Hong. "Evaluation of biofouling potential of microorganism using flow field-flow fractionation (Fl-FFF)." Desalination 264, no. 3 (December 2010): 236–42. http://dx.doi.org/10.1016/j.desal.2010.05.042.
Pellegrino, J., S. Wright, J. Ranvill, and G. Amy. "Predicting membrane flux decline from complex mixtures using flow-field flow fractionation measurements and semi-empirical theory." Water Science and Technology 51, no. 6-7 (March 1, 2005): 85–92. http://dx.doi.org/10.2166/wst.2005.0625.
Plavchak, Christine L., William C. Smith, Carmen R. M. Bria, and S. Kim Ratanathanawongs Williams. "New Advances and Applications in Field-Flow Fractionation." Annual Review of Analytical Chemistry 14, no. 1 (June 5, 2021): 257–79. http://dx.doi.org/10.1146/annurev-anchem-091520-052742.
Giordani, Stefano, Valentina Marassi, Anna Placci, Andrea Zattoni, Barbara Roda, and Pierluigi Reschiglian. "Field-Flow Fractionation in Molecular Biology and Biotechnology." Molecules 28, no. 17 (August 23, 2023): 6201. http://dx.doi.org/10.3390/molecules28176201.
Remmo, Amani, Norbert Löwa, Julija Peter, and Frank Wiekhorst. "Physical characterization of biomedical magnetic nanoparticles using multi-detector centrifugal field-flow fractionation." Current Directions in Biomedical Engineering 7, no. 2 (October 1, 2021): 327–30. http://dx.doi.org/10.1515/cdbme-2021-2083.
Markx, Gerard H., Juliette Rousselet, and Ronald Pethig. "DEP-FFF: Field-Flow Fractionation Using Non-Uniform Electric Fields." Journal of Liquid Chromatography & Related Technologies 20, no. 16-17 (September 1997): 2857–72. http://dx.doi.org/10.1080/10826079708005597.
Phelan Jr., Frederick R., and Barry J. Bauer. "Simulation of nanotube separation in field-flow fractionation (FFF)." Chemical Engineering Science 62, no. 17 (September 2007): 4620–35. http://dx.doi.org/10.1016/j.ces.2007.04.019.
Scherer, Christian, Sergey Noskov, Stefanie Utech, Christoph Bantz, Waltraut Mueller, Korinna Krohne, and Michael Maskos. "Characterization of Polymer Nanoparticles by Asymmetrical Flow Field Flow Fractionation (AF-FFF)." Journal of Nanoscience and Nanotechnology 10, no. 10 (October 1, 2010): 6834–39. http://dx.doi.org/10.1166/jnn.2010.2973.
Suwanpetch, Rabiab, Juwadee Shiowatana, and Atitaya Siripinyanond. "Using flow field-flow fractionation (Fl-FFF) for observation of salinity effect on the size distribution of humic acid aggregates." International Journal of Environmental Analytical Chemistry 97, no. 3 (February 19, 2017): 217–29. http://dx.doi.org/10.1080/03067319.2017.1296141.
Дисертації з теми "Flow field flow fractionation (Fl-FFF)":
Edwards, Thayne Lowell. "Microfrabricated Acoustic and Thermal Field-Flow Fractionation Systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/6981.
Ngaza, Nyashadzashe. "Thermal field-flow fractionation (Thermal FFF) and asymmetrical flow field-flow fractionation (AF4) as new tools for the analysis of block copolymers and their respective homopolymers." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95836.
ENGLISH ABSTRACT: Polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers contain a hydrophilic PEO block and a hydrophobic PS block. PS and PEO have different affinities for most organic solvents and as a result, the PS-b-PEO copolymers are difficult to characterize in solution. In order to achieve a complete characterization of their molecular heterogeneity different techniques have been used. Recently FFF has become a cutting edge technology for polymer analysis because it possesses a number of advantages over conventional SEC and other liquid chromatographic techniques. The mild operating conditions allow the analysis of delicate and sensitive complex analytes such as complex polymer assemblies. The ability to analyze polymers with ultrahigh molar masses has also contributed to its significance in the characterization of polymers. In this study, the FFF behaviour of PS-b-PEO copolymers as well as PS and PEO homopolymers was investigated using Thermal FFF in different organic solvents and AF4. The aim of the study was the correlation of the thermodynamic quality of the solvents and the elution behaviour of the polymers. Unfortunately, PEO homopolymers have been found to interact with the membrane in AF4. Therefore, they were best characterized in organic solvents using Thermal FFF. In contrast to AF4 no specific interactions occurred due to the absence of a membrane. Results for Thermal FFF showed that in all utilized solvents, PS and PEO homopolymers were separated in the direction of increasing molar mass. For PS-b-PEO copolymers the retention in selective (good) solvents for PS was dependent on the molar mass of the PS block in the block copolymer. This was explained by the fact that in poor solvents PEO adopts a collapsed coil conformation while PS is present in extended random coil conformation. Results also showed that polymer retention was dependent on the temperature programme utilized. The fractionations by Thermal FFF indicated that some of the PS-b-PEO copolymer samples contained PS and PEO homopolymers as by-products. After semi-preparative fractionation these homopolymers were qualitatively identified using FTIR spectroscopy.
AFRIKAANSE OPSOMMING: Polistireen-blok-poli(etileenoksied) (PS-b-PEO) ko-polimere bevat 'n hidrofiliese politetileen oksied (PEO) blok en 'n hidrofobiese polistireen (PS) blok. PS en PEO het verskillende affiniteite vir die meeste organiese oplosmiddels, dit bemoeilik die karakterisering van PS-b-PEO ko-polimere in oplossing. Ten einde 'n volledige karakterisering van hul molekulêre heterogeniteit te bepaal moet ‘n verskeidenheid van tegnieke gebruik word. Onlangs het veldvloeifraksionering (FFF) baie grond gewen tov polimeer analise, aangesien dit verskeie voordele het bo tradisionele chromatografiese tegnieke soos grootte-uitsluitingschromatografie (SEC). Die ligte operasionele omstandighede laat die ontleding van ‘n verskeidenheid van polimere toe, enige iets van delikate polimeer komplekse tot ultra hoë molekulêre massa. In hierdie studie is die FFF gedrag van PS-b-PEO ko-polimere asook PS en PEO homopolimere ondersoek met behulp van Termiese FFF(ThFFF) in verskillende organiese oplosmiddels en onsimmetriese vloei-veldvloeifraksionering(AF4). Die doel van die studie was om die verband tussen die termodinamiese gehalte van die oplosmiddels en die eluering gedrag van die polimere te bepaal. Analise van PEO homopolimere was onsuksesvol aangesien daar interaksie was met die membraan. PEO is dus net geanaliseer in organise oplosmiddels met behulp van ThFFF, aangesien daar geen membraan is nie. Analise met ThFFF het gewys dat skeiding plaasvind volgens ‘n toename in molekulêre massa in organise oplosmiddels. Vir PS-b-PEO ko-polimere die retensie in selektiewe (goeie) oplosmiddels vir PS was afhanklik van die molekulêre massa van die PS blok in die ko-polimeer. ‘n Moontlike teorie is dat die PEO blok ‘n ineengestorte spoel struktuur vorm terwyl die PS blok ‘n uitgestrekte lukraake vorm aan neem. Resultate het ook getoon dat die polimeer retensie afhanklik was van die temperatuur program wat gebruik is. Die fraksionering deur ThFFF het aangedui dat sommige van die PS-b-PEO kopolimeer monsters bestaan het uit PS en PEO homopolimere as by-produkte. Hierdie is kwalitatief bewys deur analise van die fraksies na fraksionering van die ko-polimere met behulp van FTIR spektroskopie.
Thepchalerm, Chalao. "Influence of Hevea brasiliensis latex compartments on the storage hardening of natural rubber : study of the mesostructure by AF4-MALS and of the mineral element composition by ICP-MS." Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0016/document.
The aim of the present work was to study the influence of two Hevea brasiliensis latex compartments, namely lutoids and C-serum, on the storage hardening and on mesostructure of natural rubber (NR). A special focus was done on the involvement of mineral components of latex. The NR mesostructure was studied by asymmetrical flow field-flow fractionation coupled to a multiangular light scattering detector (AF4-MALS) and by size exclusion chromatography equipped with a multiangular light scattering detector (SEC-MALS). Inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the mineral element composition of NR.As AF4-MALS and ICP-MS were never used for NR analysis, the methodologies were developed. For AF4-MALS, the best separation between the two main populations, namely isolated polyisoprene chains (random coil) and microaggregates (Gel<1µ) was given by a linear decrease, rather than exponential, of the cross-flow. For ICP-MS, the optimizations were in terms of amount of NR to be sampled, ash solubilisation methodology, ash solutions concentrations and m/z interference management. All elements, except sulfur, were determined using a mixture H2/He as collision-reaction gas (CCT H2/He mode). Sulfur content was determined through the m/z equal to 48 (32S16O+) in the CCT O2 mode.The different compartments of the whole field latex (cream, skim, C-serum and lutoids) were separated by high speed centrifugation. The mesostructure evolution of films obtained from these 3 lattices; whole field latex (FL), cream latex (CL), and skim latex (SK), by a slow structuring process (samples stored at room temperature in the laboratory for 3 months) was followed by SEC-MALS. As it was observed that the skim was not sensitive to the slow structuring, the centrifugation steps were reduced.Lutoid stability was studied by a qualitative parameter (visual lutoid status after centrifugation) and a quantitative parameter (bursting index or BI). Although the two methods could not provide strictly correlated results, BI can be a good indicator of lutoid stability. For the FL samples, a good correlation between the lutoid stability and storage hardening (ΔP) was observed. To determine if some compounds of C-serum are also involved in the storage hardening, additional experiments were done adding variable quantities of C-serum or lutoids to purified rubber particles. The storage hardening (ΔP) increased by the increase of both C-serum and lutoid quantities.The mesostructure of films and air dried sheet (ADS) made from FL and CL lattices (obtained from reduced centrifugation process) were analyzed by SEC-MALS and AF4-MALS. Concerning the ADS samples, whatever the technique used, FL samples exhibited a higher Mw, Mn, and Gel>1µ than CL samples. This difference between FL and CL samples was not observed for film samples. The microaggregates (Gel<1µ) were presented in all samples but the FL samples had more compact microaggregates, with a much higher Mw than the CL samples. Moreover, AF4 showed that the structure of microaggregates was very different between ADS and film samples. The Mw of microaggregates of ADS was 2 to 4 times higher than that of films. The mineral elements were determined only on samples from ADS (FL and CL). The main elements in NR were K, P, Mg, and S, in decreasing order. The purification of rubber particles affected the decrease in the element contents. During the storage of the latex at room temperature, only calcium content decreased, for both FL and CL samples
Maknun, Luluil. "Development of mass spectrometric analytical methods for the determination of iron complexes in plants and bacteria and for the determination of cobalt using bimetallic nanoparticles." Electronic Thesis or Diss., Pau, 2023. http://www.theses.fr/2023PAUU3039.
The research focuses on an analytical method development using chromatography coupled to mass spectrometry for the analysis of low molecular weight iron complexes. In the second part, the study explores the utilization of bimetallic nanoparticles for Co2+ detection.In the first part, a method using liquid chromatography with two detector mass spectrometry, i.e., electrospray high-resolution accurate mass (HRAM) mass spectrometry (MS) and inductively coupled mass spectrometry (ICP-MS), was developed for the analysis of low molecular weight iron (Fe) complexes, called ‘siderophores'. The complexity of the samples, their low concentrations, and the lability of the iron complexe were challenges in the development of methods for their identification and quantification. For the sample clean-up, solid phase extraction (SPE) using acidic conditions was developed to purify the samples, followed by evaporation to dryness. The individual 56Fe-siderophore complexes were identified by fast size-exclusion chromatography (FastSEC) - Orbitrap MSn based on the exact molecular mass (+ 1 ppm) and MS2. Their capability of exchanging the natural 56Fe with the spiked 58Fe was demonstrated by SEC with ICP-MS and ESI-MS detection. The method was applied to the analysis of peat collected in the Eastern part of the French Pyrenean mountains. Nineteen siderophores belonging to four different classes were presumptively identified and quantified. The results were compared with ICP-MS detection of iron and matching of the sum of the moles of iron complexes determined by the isotopic- ESI-MS within each peak as eluted from the fastSEC column.In the second part, a method using inductively coupled plasma mass spectrometry in the single particle mode and the conventional mode coupled to a flow field flow fractionation was developed to select suitable conditions for the synthesis of Ag-Au bimetallic nanoparticles and to monitor the colorimetric changes due to aggregations. Ag-Au BNPs, synthesized by using citrate reduction of Ag and Au ions, were used as sensors for the detection of Co2+. To better understand the colorimetric sensing of Co2+ using the Ag-Au BNPs, various mixtures were studied, viz. (i) only Ag-Au BNPs; (ii) Ag-Au BNPs with thiosulfate; (iii) Ag-Au BNPs with thiosulfate and ethylenediamine; and (iv) Ag-Au BNPs with thiosulfate, Co2+ and ethylenediamine. SP-ICP-MS was used to determine the core size, size distribution, and number concentration, as well as the heterogeneity of the particles synthesized by using various citrate concentrations and metal ratios. Fl-FFF-ICP-MS was also used to observe the hydrodynamic size and the Ag: Au signal intensity ratio of the BNPs to support information obtained from the SP-ICP-MS. The combination of the proposed techniques has been applied to monitor the reaction during colorimetric sensing. Additional information from fractograms provided by Fl-FFF-ICP-MS was also useful for the understanding of the aggregation of BNPs arising from the [Co(II)(en)3]2+ complex surrounding the surface of the BNPs. Furthermore, when compared to colorimetric sensing, the limit of detection for Co2+ ion, using the BNPs and SP-ICP-MS, were 20-fold lower, decreasing from ppb to ppt levels
Книги з теми "Flow field flow fractionation (Fl-FFF)":
Chromatography of polymers: Characterization by SEC and FFF. Washington, DC: American Chemical Society, 1993.
Provder, Theodore. Chromatography of Polymers: Characterization by SEC and FFF (Acs Symposium Series). An American Chemical Society Publication, 1998.
Частини книг з теми "Flow field flow fractionation (Fl-FFF)":
Wiedmer, Susanne K., and Gebrenegus Yohannes. "Characterization of Liposomes by FFF." In Field-Flow Fractionation in Biopolymer Analysis, 207–21. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0154-4_14.
Wahlund, Karl-Gustav, and Lars Nilsson. "Flow FFF – Basics and Key Applications." In Field-Flow Fractionation in Biopolymer Analysis, 1–21. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0154-4_1.
Palais, Caroline, Martinus Capelle, and Tudor Arvinte. "Studies of Loose Protein Aggregates by Flow Field-Flow Fractionation (FFF) Coupled to Multi-Angle Laser Light Scattering (MALLS)." In Field-Flow Fractionation in Biopolymer Analysis, 103–12. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0154-4_7.
Lesher, Emily K., Aimee R. Poda, Anthony J. Bednar, and James F. Ranville. "Field-Flow Fractionation Coupled to Inductively Coupled Plasma-Mass Spectrometry (FFF-ICP-MS): Methodology and Application to Environmental Nanoparticle Research." In Field-Flow Fractionation in Biopolymer Analysis, 277–99. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0154-4_17.
"Field Flow Fractionation (FFF)." In Encyclopedia of Biophysics, 759. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-16712-6_100319.
Rolland-Sabaté, Agnès, Serge Battu, Frédéric Bonfils, Karim Chelbi, and Michel Martin. "Field-Flow Fractionation (FFF)." In Advances in Physicochemical Properties of Biopolymers (Part 1), 137–83. BENTHAM SCIENCE PUBLISHERS, 2017. http://dx.doi.org/10.2174/9781681084534117010008.
Kato, Haruhisa. "Field-flow fractionation (FFF) with various detection systems." In Characterization of Nanoparticles, 249–64. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-814182-3.00016-x.
Lespes, Gaëtane, Sandrine Huclier, Serge Battu, and Agnès Rolland Sabaté. "Field flow fractionation (FFF): practical and experimental aspects." In Particle Separation Techniques, 621–57. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-323-85486-3.00005-6.
Amarasiriwardena, Dula, Atitaya Siripinyanond, and Ramon M. Barnes. "FLOW FIELD-FLOW FRACTIONATION-INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETRY (FLOW-FFF-ICP-MS): A VERSATILE APPROACH FOR CHARACTERIZATION OF TRACE METALS COMPLEXED TO SOIL-DERIVED HUMIC ACIDS." In Humic Substances, 215–26. Elsevier, 2000. http://dx.doi.org/10.1016/b978-1-85573-807-2.50022-9.
Тези доповідей конференцій з теми "Flow field flow fractionation (Fl-FFF)":
Steindl, Johannes, Rafael Eduardo Hincapie, Ante Borovina, Christoph Puls, Johann Badstöber, Gerhard Heinzmann, and Torsten Clemens. "Improved EOR Polymer Selection Using Field-Flow Fractionation." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207700-ms.
Marchis, Andreea, and Adrian Neculae. "Numerical simulation of bioparticle separation by dielectrophoretic field-flow-fractionation (DEP-FFF)." In TIM 2013 PHYSICS CONFERENCE. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4903032.
Borovina, Ante, Rafael E. Hincapie Reina, Torsten Clemens, Eugen Hoffmann, Jonas Wegner, and Johannes Steindl. "Polymer Selection for Sandstone Reservoirs Using Heterogeneous Micromodels, Field Flow Fractionation and Corefloods." In SPE Improved Oil Recovery Conference. SPE, 2022. http://dx.doi.org/10.2118/209352-ms.
Song, Minghao, and Hongwei Sun. "Simulation and Experimental Research for Microparticles in Microchannels With Dielectrophoretic Field-Flow Fractionation." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39133.
Darabi, Jeff. "Numerical Analysis of Dielectrophoretic-Based DNA Separation and Trapping." In ASME 2022 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/fedsm2022-87076.
Isogai, Akira. "Determination of Length and Width of Nanocelluloses from Their Dilute Dispersions." In Advances in Pulp and Paper Research, Oxford 2017, edited by W. Batchelor and D. Söderberg. Fundamental Research Committee (FRC), Manchester, 2017. http://dx.doi.org/10.15376/frc.2017.2.801.