Optimal Temperature for Human Life Activity

Guslisty, A. A.; Malomuzh, N. P.; Fisenko, Anatoliy I.

doi:10.15407/ujpe63.9.809

Cited by 10 publications

(15 citation statements)

References 31 publications

(29 reference statements)

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“…Substituting the indicated values for the density and size of albumin macromolecules, we obtain the following estimate: alb ≈ 0.2, which is close to the percolation threshold value (see below). The total relative volume of proteins in blood plasma may probably be 1.5-2 times larger, When calculating the plasma shear viscosity, one can consider plasma biomolecules as particles in a suspension and use a formula obtained in work [19] (see also work [18]) in the framework of the cell approach. The dependence / 0 versus prot calculated with the use of a formula obtained in work [19] is plotted in Fig.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…4. Dependences of the relative blood viscosity (with respect to the plasma viscosity) on the specific volume : Einstein's formula for diluted suspensions [16] (1 ), Batchelor's formula [17] (2 ), formula from works [18,19] (3 ) , model formula for dense suspensions [20] 4is formed from two subdomains. The subdomains, in turn, consist of 4 or 6 -helices that are fixed in certain configurations.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

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Characteristic Changes in the Density and Shear Viscosity of Human Blood Plasma with Varying Protein Concentration

et al. 2020

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The density and shear viscosity of human blood plasma and their dependence on the concentration of proteins (albumin, y-globulin, fibrinogen, etc.) entering the natural blood composition have been studied. The biomaterial concentration is varied by diluting the blood plasma with the isotonic aqueous solution. It is shown that a decrease in the biomaterial concentration down to 0.91 of its initial value leads to a drastic change in the plasma density and to a change in the character of the concentration dependence of the shear viscosity of blood plasma. A hypothesis is put forward that the observed changes in the density and shear viscosity result from the structural transformations induced by oligomerization processes; first of all, by the albumin dimerization. A conclusion is drawn that the introduced blood substitutes should not exceed 10% of the blood mass; otherwise, structural transformations of a biomaterial in blood plasma can be provoked.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Section: Discussion Of Resultsmentioning

confidence: 99%

Characteristic Changes in the Density and Shear Viscosity of Human Blood Plasma with Varying Protein Concentration

et al. 2020

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“…1 testifies to the non-equilibrium character of the processes in the solutions. Here, we considered that the acid-base balance is the sum of two contributions corresponding to the reducible and non-reducible pH components [19]. Therefore, the linear variations of the equilibrium components of the acid-base balance in Fig.…”

Section: Results Of Experimental Measurements Of Time Dependences Of ...mentioning

confidence: 99%

Вплив Атмосферного Вуглекислого Газу На Показник Кислотно-Лужного Балансу Водних Розчинів Хлориду Натрію

Stoliaryk

Khorolskyi

2022

Ukr. J. Phys.

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У роботi експериментально дослiджено вплив атмосферного вуглекислого газу на показник кислотно-лужного балансу розбавлених водних розчинiв хлориду натрiю в iнтервалi температур (294–323) К для концентрацiй, яким у середньому вiдповiдає 540, 675, 900 i 1620 молекул води на один iон натрiю або хлору. Розраховано часи релаксацiї показника кислотно-лужного балансу водних розчинiв хлориду натрiю при розчиненнi у них атмосферного вуглекислого газу в залежностi вiд температури та концентрацiї солi. Встановлено подiбнiсть поведiнки температурної залежностi часiв релаксацiї показника кислотно-лужного балансу розчинiв хлориду натрiю рiзних концентрацiй. Для з’ясування природи та особливостей подiбностi розраховано радiуси Дебая i показано, що у дослiджених нами розчинах внесок електростатичної взаємодiї не є визначальним, тому вона не буде вiдчутно впливати на молекулярнi процеси. Здiйснено спробу побудови строго теоретичного обґрунтування механiзмiв встановлення рiвноважного значення показника кислотно-лужного балансу чистої води i води при її контактi з атмосферним вуглекислим газом. Показано, що розрахунки за отриманими спiввiдношеннями добре корелюють з експериментальними результатами. Доведено, що атмосферний вуглекислий газ має суттєвий вплив на змiну показника кислотно-лужного балансу води i водних розчинiв хлориду натрiю.

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“…Temperature increment from 23 °C to 45 °C reduces PBS viscosity (similar to water) from 0.95 to 0.6 cP, and plasma from 1.75 to 1.09 cP [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Temperature and Flow Rate on the Cell-Free Area in the Microfluidic Channel

2021

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Blood cell manipulation in microdevices is an interesting task for the separation of particles, by their size, density, or to remove them from the buffer, in which they are suspended, for further analysis, and more. This study highlights the cell-free area (CFA) widening based on experimental results of red blood cell (RBC) flow, suspended in a microfluidic device, while temperature and flow rate incrementally modify RBC response within the microflow. Studies of human red blood cell flow, at a concentration of 20%, suspended in its autologous plasma and phosphate-buffered saline (PBS) buffer, were carried out at a wide flow rate, varying between 10 and 230 μL/min and a temperature range of 23 °C to 50 °C. The plotted measures show an increment in a CFA near the channel wall due to cell flow inertia after a constricted channel, which becomes more significant as temperature and flow rate increase. The temperature increment widened the CFA up to three times. In comparison, flow rate increment increased the CFA up to 20 times in PBS and 11 times in plasma.

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Optimal Temperature for Human Life Activity

Cited by 10 publications

References 31 publications

Characteristic Changes in the Density and Shear Viscosity of Human Blood Plasma with Varying Protein Concentration

Characteristic Changes in the Density and Shear Viscosity of Human Blood Plasma with Varying Protein Concentration

Вплив Атмосферного Вуглекислого Газу На Показник Кислотно-Лужного Балансу Водних Розчинів Хлориду Натрію

Effect of Temperature and Flow Rate on the Cell-Free Area in the Microfluidic Channel

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