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Differential scanning calorimetry of proteins and the two-state model : comparison of two formulas
Knarik Yeritsyan, Artem Badasyan, 2024, original scientific article

Abstract: Differential Scanning Calorimetry (DSC) is a regular and powerful tool to measure the specific heat profile of various materials. In order to connect the measured profile to the properties of a particular protein, a model is required to fit. We discuss here the application of an exact two-state formula with its approximation and process the DSC experimental data on protein folding in water. The approximate formula relies on the smallness of the transition interval, which is different for each protein. With an example of the set of 33 different proteins, we show the practical validity of the approximation and the equivalence of exact and approximate two-state formulas for processing DSC data.
Keywords: protein folding, differential scanning calorimetry, heat capacity, two-state model, Hawley model
Published in RUNG: 21.05.2024; Views: 561; Downloads: 3
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Analysis of CD and DSC protein folding data
Knarik Yeritsyan, invited lecture at foreign university

Keywords: helix-coil, chain length, helicity degree, heat capacity
Published in RUNG: 21.12.2022; Views: 2452; Downloads: 0
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Organometallic sodium carbide for heat transfer applications: A thermal lens study
Mohanachandran Nair Sindhu Swapna, Sankararaman S, 2020, original scientific article

Abstract: The search for excellent heat transfer fuids necessitates the development of novel nanofuids. The paper is the frst report revealing the potential of sodium carbide (Na2C2) nanoparticle for heat transfer and thermal shielding applications. For this, Na2C2 is prepared from the porous carbon matrix of Aloe vera leaves by hydrothermal method. The morphological changes on hydrothermal treatment and the thermal stability are analyzed by Field Emission Scanning Electron Microscopy and Thermogravimetry. The X-ray difraction analysis reveals the formation of sodium carbide, which is confrmed by Fourier transform infrared, Ultraviolet–Visible–Near Infrared, and Raman spectroscopic analyses. The spectroscopic study of the sample synthesized shows indirect bandgap energy of 1.58 eV. The thermal difusivity of Na2C2 nanofuid, determined by the single-beam thermal lens technique, exhibited 87 % enhancement for the base fuid, suggesting its potential in heat transfer applications.
Keywords: Aloe vera, Heat transfer, Organometallic, Sodium carbide, Thermal lens
Published in RUNG: 04.07.2022; Views: 1361; Downloads: 0
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PHYSICS II - Exercises : Part 2: Thermodynamics
other educational material

Keywords: Thermodynamics, Kinetic Theory of Gases, Heat, Heat Engine
Published in RUNG: 12.05.2020; Views: 2672; Downloads: 61
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