Micro-thermal field-flow fractionation of bacteria

Janča, Josef; Kašpárková, Věra; Halabalová, Věra; Šimek, Lubomı́r; Růžička, Jan; Barošová, Eva

doi:10.1016/j.jchromb.2007.02.018

Cited by 15 publications

(6 citation statements)

References 25 publications

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“…Investigations have also been made to study colloidal mixtures [144,145] and bio-macromolecules [146,147]. A detailed review of the application of ThFFF to characterize natural, biological and synthetic polymers has been presented by Messaud et al [148].…”

Section: Thermal Field-flow Fractionation (Thfff)mentioning

confidence: 99%

Experimental approaches to study thermodiffusion – A review

Srinivasan

Saghir

2011

International Journal of Thermal Sciences

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Section: Thermal Field-flow Fractionation (Thfff)mentioning

confidence: 99%

Experimental approaches to study thermodiffusion – A review

Srinivasan

Saghir

2011

International Journal of Thermal Sciences

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“…Separation and characterization of polymers occurs mainly due to the thermodiffusion effect [11][12][13][14]. Feld-flow-fractionation devices work based on this phenomenon [15][16][17][18][19][20], and they are used in the separation of bacteria [21,22], colloidal materials [23,24], charged particles [25], and others.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Diffusion in Binary and Ternary Hydrocarbon Mixtures

Mousavi¹

2021

Preprint

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In a multi-component liquid mixture, the process of disassociation of the components induced by thermal gradient is called thermal diffusion or Soret effect. This effect plays a crucial role in separation of the components in hydrocarbon mixtures of oil. Accordingly, the main goal of this study is to experimentally investigate the Soret effect in binary and ternary hydrocarbon mixtures. Optical interferometry technique with Mach-Zehnder scheme was used to conduct the experiments. The interferometry techniques are not intrusive and the separation of the components in the mixture is not affected by the measurement instrument. A Soret cell is defined as a cubic cavity where the sample mixture is placed in it and, the separation of the components takes place in the cell by heating it from the above. Soret cells are used in convectionless experiments and natural convections are undesirable. The Soret cell used in space experiments was re-designed and optimized for ground-based experiments to avoid the natural convections. Computational studies were made on the both cells to obtain the temperature and velocity fields. Then a set of thermal diffusion experiments conducted in order to compare the performance of the cells. The results shows that the induced convective motions in the second cell are significantly weaker than those in the previous cell which is desirable. In the next step, the effect of the inclination of the cell on the thermal diffusion was studied. First numerical analysis was made to find the velocity and temperature fields in different inclinations and then a set of experiments was performed and the concentration distribution of the components in a binary mixture in different inclinations of the cell was found. Finally, ground based experiments were performed to study the thermal diffusion in five ternary hydrocarbon mixtures. Optical interferometry with Mach-Zehnder scheme using two laser sources with different wavelengths was used. The Soret information of one of the mixtures is available in the literature and this mixture was studied here to validate the present experimental setup. The temperature and concentration of the mixtures were measured successfully in the Soret cell and a table of the measured Soret coefficient were provided.

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“…The Ludwing-soret effect was an important development as it enabled the analysis of the partial separation of components in a mixture by the application of a temperature gradient. This phenomenon has great of importance in many natural processes, such as in the dispersion of components of oil wells [41] [42], or the dispersion of the components in the magma [43], in the characterization of isotopes [44], even in the distribution of elements in creating life [45] and also in biological fluids such as DNA, proteins or bacteria [46] [47] [48].…”

Section: Introductionmentioning

confidence: 99%