Measurement of the rheological properties of biological fluids—III. Viscoelastic properties of blood serum

Biorheology ◽  
1972 ◽  
Vol 9 (4) ◽  
pp. 265-271
Author(s):  
B. Barnett ◽  
E. Meilman ◽  
C.D. Han
Keyword(s):  
Blood Serum ◽  
Rheological Properties ◽  
Viscoelastic Properties ◽  
Biological Fluids

scholarly journals The Influence of the Addition of Nuts on the Thermal and Rheological Properties of Wheat Flour

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3969
Author(s):  
Karolina Pycia ◽  
Lesław Juszczak
Keyword(s):  
Rheological Properties ◽  
Wheat Flour ◽  
Viscoelastic Properties ◽  
Control Sample ◽  
Scanning Calorimetry ◽  
Creep And Recovery ◽  
Research Material ◽  
Pasting Characteristics ◽  
Tan Δ ◽  
Weak Gels

The aim of the study was to assess the influence of replacing wheat flour with hazelnuts or walnuts, in various amounts, on the thermal and rheological properties of the obtained systems. The research material were systems in which wheat flour was replaced with ground hazelnuts (H) or walnuts (W) in the amount of 5%, 10%, and 15%. The parameters of the thermodynamic gelatinization characteristics were determined by the differential scanning calorimetry method. In addition, the pasting characteristics were determined with the use of a viscosity analyzer and the viscoelastic properties were assessed. Sweep frequency and creep and recovery tests were used to assess the viscoelastic properties of the tested gels. It was found that replacing wheat flour with nuts increased the values of gelatinization temperature, gelatinization, and retrogradation enthalpy, and the degree of retrogradation. The highest viscosity was characteristic of the control sample (2039 mPa·s), and the lowest for the paste with 15% addition of walnuts (1120 mPa·s). Replacing the flour with nuts resulted in a very visible reduction in the viscosity of such systems. In addition, gels based on the systems with the addition of H and W were weak gels (tan δ = G″/G′ > 0.1), and the values of G′ and G″ parameters decreased with the increased share of nuts in the systems. Creep and recovery analysis indicated that the systems in which wheat flour was replaced with hazelnuts were less susceptible to deformation compared to the systems with the addition of W.

MONITORING OF MALIGNANT GROWTH DYNAMICS BY STRUCTURAL ANALYSIS OF NON-CELLULAR TISSUE

2021 ◽  
pp. 89-96
Author(s):  
V.N. Shabalin ◽  
S.N. Shatokhina ◽  
M.G. Dedova
Keyword(s):  
Blood Serum ◽  
Laryngeal Cancer ◽  
Solid Phase ◽  
Biological Fluids ◽  
Treatment Options ◽  
Developmental Phase ◽  
Malignant Growth ◽  
Active Growth ◽  
Main Research ◽  
Degree Of Anisotropy

The authors examined the composition of biocrystalline structures (anisomorphones) of blood serum in patients with laryngeal cancer. Such structures are formed when blood serum becomes solid, i.e. during its marginal dehydration. The revealed anisomorphones represent three types of marker structures: a marker of a malignant tumor active growth (the aggregation of macroferolite and granular microspherolite with the same degree of anisotropy); a marker of a degenerative-dystrophic process (the aggregation of a macrospherolite with a low degree of anisotropy and microspherolite with a high degree of anisotropy); a marker of a malignant growth progression (a wavy microspherolite without aggregation). The aim of the study is to identify diagnostic markers of the malignant process activity in the solid phase structures of the blood serum in patients with laryngeal cancer and to assess their importance for choosing an effective therapy. Materials and Methods. Marginal dehydration of blood serum was used as the main research method. It is a part of the "Litos-system" diagnostic technology (Marketing authorization FS No. 155, of 2009). Results. It has been shown that the developmental phase of laryngeal cancer (active growth or degenerative-dystrophic process) is an important criterion for choosing treatment options. Surgical treatment is the most effective during the degenerative-dystrophic tumor process, while radiation therapy is preferable during the active phase of malignant growth. Key words: laryngeal cancer, blood serum, marginal dehydration of biological fluids, markers of tumor growth activity. Исследован состав биокристаллических структур (анизоморфонов) сыворотки крови больных раком гортани, которые формируются при переходе сыворотки крови в твердую фазу в процессе ее краевой дегидратации. Выявленные анизоморфоны представляют собой три вида маркерных структур: маркер активного роста злокачественной опухоли – агрегация макросферолита и зернистого микросферолита с одинаковой степенью анизотропии; маркер дегенеративно-дистрофического процесса – агрегация макросферолита с низкой степенью анизотропии и микросферолита с высокой степенью анизотропии; маркер прогрессии злокачественного роста – волнистый микросферолит вне агрегации. Цель – выявить диагностические маркеры активности злокачественного процесса в структурах твердой фазы сыворотки крови больных раком гортани и оценить их значение для выбора эффективного вида лечения. Материалы и методы. В качестве основного метода исследования использован метод краевой дегидратации сыворотки крови, являющийся разделом диагностической технологии «Литос-система» (Разрешение ФС № 155 от 2009 г. на применение в клинической практике). Результаты. Показано, что фаза развития рака гортани (активный рост или дегенеративно-дистрофический процесс) служит важным критерием выбора вида лечения: в фазу дегенеративно-дистрофического процесса опухоли наиболее благоприятный эффект дает хирургическое лечение, а в период активной фазы злокачественного роста – лучевая терапия. Ключевые слова: рак гортани, сыворотка крови, краевая дегидратация биологических жидкостей, маркеры фазы активности опухолевого роста.

Measurement of the rheological properties of biological fluids—II1

Biorheology ◽  
1971 ◽  
Vol 8 (2) ◽  
pp. 71-77 ◽  
Author(s):  
B. Barnett ◽  
E. Meilman ◽  
C.D. Han
Keyword(s):  
Rheological Properties ◽  
Biological Fluids

Emission Spectrometric Determination of Trace Elements in Biological Fluids

1971 ◽  
Vol 25 (1) ◽  
pp. 53-56 ◽  
Author(s):  
William Niedermeier ◽  
James H. Griggs ◽  
Richard S. Johnson
Keyword(s):  
Experimental Data ◽  
Trace Elements ◽  
Sample Preparation ◽  
Blood Serum ◽  
Biological Fluids ◽  
Spectrometric Method ◽  
Direct Reading ◽  
Iron Aluminum ◽  
Dc Arc

An emission spectrometric method of analysis is described, in which trace quantities of copper, iron, aluminum, barium, manganese, nickel, cesium, tin, strontium, chromium, zinc, lead, molybdenum, and cadmium were determined in blood serum. The sample preparation, starting with 2.0 ml of blood serum, is discussed in detail. The source of excitation was a 10 A dc arc. Quantitation was achieved with a direct reading emission spectrometer. The metal concentration, in micrograms per 100 ml of blood serum, was calculated from the experimental data by means of a computer.

Clinical and Diagnostic Value of Cardiac Markers in Human Biological Fluids

Kardiologiia ◽  
2019 ◽  
Vol 59 (11) ◽  
pp. 66-75 ◽  
Author(s):  
A. M. Chaulin ◽  
L. S. Karslyan ◽  
E. V. Bazyuk ◽  
D. A. Nurbaltaeva ◽  
D. V. Duplyakov
Keyword(s):  
Blood Serum ◽  
Oral Fluid ◽  
Biological Fluids ◽  
High Sensitivity ◽  
Diagnostic Value ◽  
Cardiac Markers ◽  
Methods Of Analysis ◽  
Clinical Diagnostic

The article is devoted to problems of clinical-diagnostic value of determination of cardio-specific troponins in human biological fluids. Improvement of laboratory instrumentation and emergence of high sensitivity methods of analysis have allowed to identify troponins in urine, dialysate, and oral fluid. In the review we present actual information related to measurement of troponins in blood serum, data on testing of cardio-specific troponins in urine, dialysate, and oral fluid. Special attention is paid to determination of some cardiomarkers in oral fluid with thorough analysis of diagnostic value and effectiveness of the conducted studies.

The Effect of Refrigerated Storage on the Rheological Properties of Three Commercial Mozzarella Cheeses

2008 ◽  
Vol 4 (4) ◽  
Author(s):  
Edward B Muliawan ◽  
Savvas G Hatzikiriakos
Keyword(s):  
Rheological Properties ◽  
Viscoelastic Properties ◽  
Elevated Temperatures ◽  
Maxwell Model ◽  
Model Parameters ◽  
Refrigerated Storage ◽  
Mozzarella Cheese ◽  
Relaxation Dynamics ◽  
Generalized Maxwell Model ◽  
Linear Viscoelastic

The linear and non-linear viscoelastic properties and the effect of refrigerated storage on the rheological properties of three commercial mozzarella cheeses was studied. The linearity of the rheological behavior of mozzarella cheese increases with temperature because of the ability for the cheese to flow easier at higher temperatures as well as the lack of yield stress at elevated temperatures. The generalized Maxwell model parameters obtained from the linear viscoelastic data were found to describe the linear relaxation dynamics of the mozzarella cheese satisfactorily. It is also shown that the damping function of mozzarella cheese, which is a measure of the degree of non-linearity, can be described by a generalized Zapas model. Although, the different commercial mozzarella cheeses do not exhibit linear viscoelastic differences at room temperature, they do show significant differences at 60°C. The effect of refrigerated storage on the linear viscoelastic properties is brand-dependent and indicates structural differences among cheese samples. Finally it is shown that the dynamic moduli decrease with longer refrigerated storage due to proteolysis activities and/or weakening of the casein matrix.

Rheological Properties and Microstructures of Thermo-Sensitive Microemulsion-Based Gels

2012 ◽  
Vol 557-559 ◽  
pp. 1009-1012
Author(s):  
Xue Yan Zhao ◽  
Yu Rong Cao ◽  
Rui Jie Xiao ◽  
Gui Rong Cao
Keyword(s):  
Fluorescence Spectroscopy ◽  
Rheological Properties ◽  
Viscoelastic Properties ◽  
Isopropyl Myristate ◽  
Rheological Measurements ◽  
Pluronic P123

Thermo-sensitive microemulsion-based gels (MBGs) were prepared by the addition of Pluronic P123 (PEO20PPO70PEO20) into O/W microemulsion composed of isopropyl myristate (IPM)/Span20/Tween20/H2O. The results of rheological measurements indicate that the viscoelastic properties of the systems increase and the gelation temperatures decrease with increasing P123 concentration. Fluorescence spectroscopy was used to study the micropolarity of the hydrogel (P123/H2O), microemulsion and MBGs systems. The results show that the microstructures of microemulsion droplets are maintained in MBGs.

Rheological properties of anionic polystyrenes. 7. Viscoelastic properties of six-branched star polystyrenes and their concentrated solutions

1981 ◽  
Vol 14 (2) ◽  
pp. 354-360 ◽  
Author(s):  
Toshiro Masuda ◽  
Yasuhiko Ohta ◽  
Mitsunobu Kitamura ◽  
Yoichiro Saito ◽  
Kyoko Kato ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Viscoelastic Properties ◽  
Concentrated Solutions
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