Experimental and theoretical study of antioxidative properties of some salicylaldehyde and vanillic Schiff bases

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24094-24100 ◽  
Author(s):  
Zorica D. Petrović ◽  
Jelena Đorović ◽  
Dušica Simijonović ◽  
Vladimir P. Petrović ◽  
Zoran Marković
Keyword(s):  
High Activity ◽  
Schiff Bases ◽  
Theoretical Study ◽  
Antioxidative Properties ◽  
Experimental Findings

A set of ten phenolic Schiff bases was evaluated for their antioxidative properties. Two of them, one salicylaldehyde and one vanillic, showed high activity. Parameters obtained by DFT supported the experimental findings.

Effect of altered gas diffusivity on alveolar gas exchange-a theoretical study

1980 ◽  
Vol 48 (1) ◽  
pp. 147-153 ◽  
Author(s):  
W. Nixon ◽  
A. Pack
Keyword(s):  
Blood Flow ◽  
Gas Exchange ◽  
Theoretical Study ◽  
Experimental Studies ◽  
Flow Distribution ◽  
Molecular Diffusivity ◽  
Gas Diffusivity ◽  
Experimental Findings ◽  
Lung Airways ◽  
Alveolar Gas Exchange

Experimental studies have established that alveolar gas exchange is inversely relation to the molecular diffusivity of gas in the lung airways. The mechanism underlying this relationship is, however, unclear. To investigate this phenomenon, the conditions relevant to the experimental studies are simulated using a computational model of pulmonary gas transport. Results from these simulations suggest that the inverse relationship found experimentally can largely be explained on the basis of the intra-acinar stratification of blood flow and gas concentrations. Gas having a relatively low molecular diffusivity is not transported as far into the acinus as gas having a higher diffusivity. When these relative intra-acinar gas distributions interact with the blood flow distribution, which has been shown experimentally to be weighted towards the proximal alveoli, more gas exchange occurs in the low molecular diffusivity mixture. Consideration of the various other mechanisms that have been proposed to explain the experimental findings.he inverse dependence suggests that they are of little significance. In particular, our studies remove the need to invoke Taylor diffusion to explain the experimental findings.

Determination of the Fluid-Elastic Stability Threshold in the Presence of Turbulence: A Theoretical Study

1989 ◽  
Vol 111 (4) ◽  
pp. 407-419 ◽  
Author(s):  
J. H. Lever ◽  
G. Rzentkowski
Keyword(s):  
Theoretical Study ◽  
Cross Flow ◽  
Elastic Stability ◽  
Mass Ratio ◽  
Response Curves ◽  
Stability Threshold ◽  
Pitch Ratio ◽  
The Stability ◽  
Experimental Findings

A model has been developed to examine the effect of the superposition of turbulent buffeting and fluid-elastic excitation on the response of a single flexible tube in an array exposed to cross-flow. The modeled response curves for a 1.375-pitch ratio parallel triangular array are compared with corresponding experimental data for the same array; reasonably good qualitative agreement is seen. Turbulence is shown to have a significant effect on the determination of the stability threshold for the array, with increasing turbulent buffeting causing a reduction in the apparent critical velocity. The dependence of turbulence response on mass ratio is also found to yield a slight independence between mass and damping parameters on stability threshold estimates, which may account for similar experimental findings. Different stability criteria are compared, and an attempt is made to provide some guidance in the interpretation of response curves from actual tests.

scholarly journals Biferrocenyl Schiff bases as efficient corrosion inhibitors for an aluminium alloy in HCl solution: a combined experimental and theoretical study

RSC Advances ◽  
2020 ◽  
Vol 10 (13) ◽  
pp. 7585-7599 ◽  
Author(s):  
Uzma Nazir ◽  
Zareen Akhter ◽  
Naveed Kausar Janjua ◽  
Muhammad Adeel Asghar ◽  
Sehrish Kanwal ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Theoretical Study ◽  
Electrochemical Impedance ◽  
Electron Microscopic ◽  
Loss Analysis ◽  
Tafel Polarization ◽  
Electron Microscopic Technique ◽  
Scanning Electron Microscopic ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The anticorrosion activity of biferrocenyl Schiff bases on AA2219-T6 in acidic medium were studied using Tafel polarization, electrochemical impedance spectroscopy, weight loss analysis, FT-IR spectroscopy and scanning electron microscopic technique.

scholarly journals One-bond 1 J (15 N,H) coupling constants at sp2 -hybridized nitrogen of Schiff bases, enaminones and similar compounds: A theoretical study

2020 ◽  
Vol 58 (8) ◽  
pp. 750-762
Author(s):  
Poul Erik Hansen ◽  
Bahjat A. Saeed ◽  
Rita S. Rutu ◽  
Teobald Kupka
Keyword(s):  
Schiff Bases ◽  
Theoretical Study ◽  
Coupling Constants
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