scholarly journals Discussion: “The Adiabatic Bulk Modulus of Normal Paraffin Hydrocarbons From Hexane to Hexadecane” (Rolling, R. E., and Vogt, C. J., 1960, ASME J. Basic Eng., 82, pp. 635–642)

1960 ◽  
Vol 82 (3) ◽  
pp. 643-644
Author(s):  
A. S. Levens
Keyword(s):  
Bulk Modulus ◽  
Normal Paraffin

The Adiabatic Bulk Modulus of Normal Paraffin Hydrocarbons From Hexane to Hexadecane

1960 ◽  
Vol 82 (3) ◽  
pp. 635-642 ◽  
Author(s):  
R. E. Rolling ◽  
C. J. Vogt
Keyword(s):  
Bulk Modulus ◽  
Kinematic Viscosity ◽  
Sonic Velocity ◽  
Test Medium ◽  
Velocity Measurements ◽  
Normal Paraffin ◽  
Rolling Ball ◽  
Absolute Viscosity ◽  
Time Required ◽  
Rolling Ball Viscometer

A method for determining the sonic velocity in a fluid as a function of pressure and temperature is described. The method used measures the time required for an expansion wave to travel a known distance through the test medium. The results of the sonic velocity measurements are presented for normal hydrocarbons from C6 to C16 for temperatures and pressures from 60 to 250 F and 0 to 5000 psig, respectively. The density of the hydrocarbons was also determined. The absolute viscosity of the test compounds was determined by use of a rolling-ball viscometer for pressures from 0 to 6000 psig in the temperature range given. Tabulated and graphical results are presented for adiabatic bulk modulus, density, and absolute and kinematic viscosity for the range of hydrocarbons tested.

scholarly journals Biomechanical Measurement of Rabbit Cornea by a Modified Scheimpflug Device

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Bo Zhang ◽  
Jianjun Gu ◽  
Xiaoxiao Zhang ◽  
Bin Yang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Anterior Segment ◽  
Intraobserver Reliability ◽  
Rabbit Cornea ◽  
Deformation Response ◽  
Biomechanical Measurements ◽  
Biomechanical Measurement

Purpose. To explore the probability and variation in biomechanical measurements of rabbit cornea by a modified Scheimpflug device.Methods. A modified Scheimpflug device was developed by imaging anterior segment of the model imitating the intact eye at various posterior pressures. The eight isolated rabbit corneas were mounted on the Barron artificial chamber and images of the anterior segment were taken at posterior pressures of 15, 30, 45, 60, and 75 mmHg by the device. The repeatability and reliability of the parameters including CCT, ACD, ACV, and CV were evaluated at each posterior pressure. All the variations of the parameters at the different posterior pressures were calculated.Results. All parameters showed good intraobserver reliability (Cronbach’s alpha; intraclass correlation coefficient,α, ICC > 0.96) and repeatability in the modified Scheimpflug device. With the increase of posterior pressures, the ratio of CCT decreased linearly and the bulk modulus gradually reduced to a platform. The increase of ACD was almost linear with the posterior pressures elevated.Conclusions. The modified Scheimpflug device was a valuable tool to investigate the biomechanics of the cornea. The posterior pressure 15–75 mmHg range produced small viscoelastic deformations and nearly linear pressure-deformation response in the rabbit cornea.

scholarly journals A pressure induced reversal to the 9R perovskite in Ba3MoNbO8.5

2021 ◽  
Vol 9 (10) ◽  
pp. 6567-6574
Author(s):  
B. Sherwood ◽  
C. J. Ridley ◽  
C. L. Bull ◽  
S. Fop ◽  
J. M. S. Skakle ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Structural Transformation ◽  
Pressure Response ◽  
Energy Barriers ◽  
Transport Pathways

The pressure response of Ba3MoNbO8.5 reveals a structural transformation, which acts to increase the energy barriers to migration along all available transport pathways, and an exceptionally low bulk modulus.

scholarly journals Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
A. S. J. Méndez ◽  
F. Trybel ◽  
R. J. Husband ◽  
G. Steinle-Neumann ◽  
H.-P. Liermann ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Diamond Anvil
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