![]() Therefore, we perfused mice brains with solutions used for human body preservation to assess and compare the tissue quality and antigenicity of the main cell populations. These specimens are fixed with solutions appropriate for dissections, but whether they also preserve brain tissue antigenicity is unclear. However, a larger number of specimens could be obtained from gross anatomy laboratories. Histology remains the gold-standard to assess human brain biology, so ex vivo studies using tissue from brain banks are standard practice in neuroscientific research. To summarize, the proposed glycerol–butanol blend can be directly used as a replacement for gasoline in internal combustion spark-ignition engines. Exhaust temperature remarkably decreased by 3.4%, which contributed to an increase in the indicated mean effective pressure by approximately 4% compared to gasoline 95. As regards the engine performance and combustion progress, no significant differences were observed. As measured, CO exhaust emissions increased, NOx emissions decreased, and UHC emissions were unchanged for the glycerol–butanol blend when compared to the test with sole gasoline. A comparative analysis was performed to find potential similarities and differences in the engine fueled with gasoline 95 and the proposed glycerol–butanol blend. The engine tests conducted with this glycerol–butanol blend were focused on the performance, combustion thermodynamics, and exhaust emissions of a spark-ignition engine. The proposed fuel is a blend of 75% n-butanol and 25% glycerol. Investigation of a new type of fuel for the internal combustion engine, which can be successfully used in both the power generation and the automotive industries, is presented in this article. The pressure dependence of glass transition temperature and fragility index of glycerol were calculated from model equations being the results in good agreement with data selected from the literature. Viscosity of glycerol free#The free volume proved to be more accurate in the calculation of viscosity in wide T and p ranges with average absolute percentual deviations (AADs) ranging from 4 % to 14% for data from different authors. High-pressure viscosity data allowed studying the temperature, pressure and density dependences of this property using the free volume theory and the thermodynamic scaling of viscosity. Stickel derivatives were calculated for the correlation equations and they were compared with values found from viscosity data using numerical techniques. Some of the tested equations give overall absolute deviations less than 6 % in the range (190 to 440) K, a value which is close the experimental uncertainty. From BSCNF the structural effects taking place near the glass transition were discussed in light of results obtained by recent experimental techniques. The physically sound equations of Mauro (MYEGA) and the Bond Strength-Coordination Number Fluctuation (BSCNF) model were used to correlate values selected from the database. The main purpose of database construction was the development and evaluation of reliable correlation models of viscosity valid in wide ranges of temperature and pressure. An extensive viscosity database for this substance was developed combining the values of this work with those published in literature covering a wide range of temperatures at atmospheric pressure from the calculated glass transition temperature (Tg =188 K), and measurements of viscosity reported over the temperature range (263 to 398) K at pressures from (10⁻⁴ to 3) GPa. The presented results are in good agreement with most values from the literature. The combined expanded uncertainty of reported viscosity is better than 3.0% with a level of confidence 0.95 (k=2). The dynamic viscosities of glycerol were measured over the temperature range (293 to 394) K and atmospheric pressure using a Brookfield thermosel system. ![]()
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