scholarly journals Characteristics of CSF Velocity-Time Profile in Posttraumatic Syringomyelia

2017 ◽  
Vol 38 (9) ◽  
pp. 1839-1844 ◽  
Author(s):  
J. Yeo ◽  
S. Cheng ◽  
S. Hemley ◽  
B.B. Lee ◽  
M. Stoodley ◽  
...  
Keyword(s):  
Time Profile ◽  
Posttraumatic Syringomyelia

Interaction of human hemoglobin with oxygen in the presence of benzene and use of computer for construction of saturation curves

1986 ◽  
Vol 51 (8) ◽  
pp. 1795-1801
Author(s):  
Hana Hájková ◽  
Zdeněk Pavlíček ◽  
Vítěz Kalous
Keyword(s):  
Oxygen Saturation ◽  
Oxygen Pressure ◽  
Time Profile ◽  
Partial Oxygen Pressure ◽  
Human Hemoglobin ◽  
Allosteric Interaction ◽  
Partial Oxygen

The time profile of changes in the oxygen saturation curves of human hemoglobin in the presence of benzene was investigated. The partial oxygen pressure p50, necessary for a half saturation, decreases during the first 3.5 h of interaction of hemoglobin with benzene and did not change afterwards. The character of changes in Hill's coefficient was similar. The oxygen saturation was modeled both for hemoglobin alone and, using MWC as a model of allosteric interaction, also for hemoglobin and benzene in a computer.

scholarly journals Sex, Type of Surgery, and Surgical Site Infections Are Associated with Perioperative Cortisol in Colorectal Cancer Patients

2021 ◽  
Vol 10 (4) ◽  
pp. 589
Author(s):  
Mariusz G. Fleszar ◽  
Paulina Fortuna ◽  
Marek Zawadzki ◽  
Paweł Hodurek ◽  
Iwona Bednarz-Misa ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Open Surgery ◽  
Surgical Site Infections ◽  
Time Profile ◽  
C Reactive Protein ◽  
Robot Assisted ◽  
Related Factors ◽  
Reactive Protein ◽  
Baseline Cortisol ◽  
Colorectal Cancer Patients

Excessive endocrine response to trauma negatively affects patients’ well-being. Cortisol dynamics following robot-assisted colorectal surgery are unknown. We aimed at determining the impact of cancer pathology and surgery-related factors on baseline cortisol levels and analyzed its time-profile in colorectal cancer patients undergoing open or robot-assisted surgery. Cortisol levels were measured using liquid chromatography quadrupole time-of-flight mass spectrometry. Baseline cortisol was not associated with any patient- or disease-related factors. Post-surgery cortisol increased by 36% at 8 h and returned to baseline on postoperative day three. The cortisol time profile was significantly affected by surgery type, estimated blood loss, and length of surgery. Baseline-adjusted cortisol increase was greater in females at hour 8 and in both females and patients from open surgery group at hour 24. Solely in the open surgery group, cortisol dynamics paralleled changes in interleukin (IL)-1β, IL-10, IL-1ra, IL-7, IL-8 and tumor necrosis factor (TNF)-α but did not correlate with changes in IL-6 or interferon (IFN)-γ at any time-point. Cortisol co-examined with C-reactive protein was predictive of surgical site infections (SSI) with high accuracy. In conclusion, patient’s sex and surgery invasiveness affect cortisol dynamics. Surgery-induced elevation can be reduced by minimally invasive robot-assisted procedures. Cortisol and C-reactive protein as SSI biomarkers might be of value in the evaluation of safety of early discharge of patients.

scholarly journals The duration-energy-size enigma for acoustic emission

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Blai Casals ◽  
Karin A. Dahmen ◽  
Boyuan Gou ◽  
Spencer Rooke ◽  
Ekhard K. H. Salje
Keyword(s):  
Acoustic Emission ◽  
Mean Field Theory ◽  
Mean Field ◽  
Maximum Amplitude ◽  
Time Profile ◽  
Power Law Distribution ◽  
Model Predictions ◽  
Ae Signal ◽  
Strain Signal ◽  
Better Than

AbstractAcoustic emission (AE) measurements of avalanches in different systems, such as domain movements in ferroics or the collapse of voids in porous materials, cannot be compared with model predictions without a detailed analysis of the AE process. In particular, most AE experiments scale the avalanche energy E, maximum amplitude Amax and duration D as E ~ Amaxx and Amax ~ Dχ with x = 2 and a poorly defined power law distribution for the duration. In contrast, simple mean field theory (MFT) predicts that x = 3 and χ = 2. The disagreement is due to details of the AE measurements: the initial acoustic strain signal of an avalanche is modified by the propagation of the acoustic wave, which is then measured by the detector. We demonstrate, by simple model simulations, that typical avalanches follow the observed AE results with x = 2 and ‘half-moon’ shapes for the cross-correlation. Furthermore, the size S of an avalanche does not always scale as the square of the maximum AE avalanche amplitude Amax as predicted by MFT but scales linearly S ~ Amax. We propose that the AE rise time reflects the atomistic avalanche time profile better than the duration of the AE signal.

Calculation of the signal time-profile in transient CARS experiments

1991 ◽  
Vol 52 (2) ◽  
pp. 132-137 ◽  
Author(s):  
R. Torre ◽  
R. Righini ◽  
P. Foggi ◽  
L. Angeloni
Keyword(s):  
Time Profile ◽  
Signal Time

Cell Therapy as a New Approach to the Treatment of Posttraumatic Syringomyelia

2017 ◽  
Vol 107 ◽  
pp. 1047.e5-1047.e8 ◽  
Author(s):  
Jesús Vaquero ◽  
Rasha Hassan ◽  
Cecilia Fernández ◽  
Gregorio Rodríguez-Boto ◽  
Mercedes Zurita
Keyword(s):  
Cell Therapy ◽  
New Approach ◽  
Posttraumatic Syringomyelia
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