Evaluating the effect of oxygen groups attached to the surface of graphenic sheets on bacteria adhesion: The role of the electronic factor

Abstract The current study is concerned with the first principle investigations of the oxygenated MoS2 to explore the electronic and optical properties. We consider various oxygen concentrations (MoS2, MoS1.75O0.25, MoS1.5O0.5, MoSO) for the prediction of its impact on parameters using PBE-GGA approximation. A noticeable change in parameters has been observed in the visible regime with the introduction of oxygen content in the MoS2 structure. The results of the electronic properties suggest a string role of Mo d-states, S p-states, and O p-states which, however, show variations for various O concentrations near the Fermi level. In comparison to the absorption trend of pure MoS2, the optical absorption spectra show a blue shift in the visible range. The effect of oxygen can also be seen in the experimentally prepared MoS2 thin films as the variation of optical behavior can be seen. Refractive index decreases from ~2.5 to ~2. Similarly, absorption graphs show a lack of absorption phenomenon as the oxygen content increases. The role of oxygen brings appreciable changes in the optical parameters over the different energy ranges.

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Effect of oxygen on blood flow autoregulation in cat sartorius muscle

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.1981.241.6.h807 ◽

1981 ◽

Vol 241 (6) ◽

pp. H807-H815 ◽

Cited By ~ 5

Author(s):

S. M. Sullivan ◽

P. C. Johnson

Keyword(s):

Blood Flow ◽

Perfusion Pressure ◽

Important Determinant ◽

Flow Regulation ◽

Sartorius Muscle ◽

Gas Mixture ◽

Pressure Reduction ◽

Effect Of Oxygen ◽

Arteriolar Diameter

To assess the role of O2 in blood flow autoregulation, arteriolar diameter and erythrocyte velocity were measured in individual microvessels of the cat sartorius muscle while ambient O2 tension (PO2) and perfusion pressure were altered. The muscle surface was covered with a layer of silicone fluid equilibrated with a gas mixture containing 0—20% O2. Under control conditions (0% O2) all except the largest arterioles dilated with pressure reduction, and all showed significant blood flow autoregulation. Elevated PO2 diminished flow regulation and dilation in large and small arterioles when arterial pressure was reduced. This effect was generally more pronounced in the small arterioles where elevated PO2 caused complete cessation of blood flow. Complete blood flow stoppage was not routinely seen in larger vessels and may reflect the fact that these vessels also supply deeper tissue regions less affected by the change in ambient PO2. Our results indicate that the PO2 level of the tissue may be an important determinant in blood flow autoregulation.

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Role of oxygen in the determination of oxide forming elements by electrothermal atomic absorption spectrometry Part 3. Effect of oxygen on the reactions of tin in uncoated, pyrolytically coated and zirconium carbide coated graphite tube atomizers

Spectrochimica Acta Part B Atomic Spectroscopy ◽

10.1016/0584-8547(96)01510-8 ◽

1996 ◽

Vol 51 (9-10) ◽

pp. 1133-1137 ◽

Cited By ~ 10

Author(s):

German Müller-Vogt ◽

Florian Weigend ◽

Wolfgang Wendl

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Electrothermal Atomic Absorption Spectrometry ◽

Zirconium Carbide ◽

Absorption Spectrometry ◽

Graphite Tube ◽

Effect Of Oxygen

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Effect of Oxygen on Phase Precipitation and Mechanical Functionality in Ti-29Nb-13Ta-4.6Zr

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.436.179 ◽

2010 ◽

Vol 436 ◽

pp. 179-184 ◽

Cited By ~ 1

Author(s):

Mitsuo Niinomi ◽

Masaaki Nakai ◽

Toshikazu Akahori ◽

Harumi Tsutsumi

Keyword(s):

Solid Solution ◽

Titanium Alloys ◽

Young’S Modulus ◽

Martensite Phase ◽

Phase Precipitation ◽

Solid Solution Strengthening ◽

Orthorhombic Martensite ◽

Solution Strengthening ◽

Effect Of Oxygen

Oxygen plays very important roles in titanium and its alloys. Solute oxygen in titanium alloys leads to solid solution strengthening, suppressing the precipitation of the athermal omegaor orthorhombic martensite phase, enhancing the formation of the -case, etc. The proper using oxygen is effective to improve the mechanical functionalities of titanium alloys. However, the role of oxygen in titanium alloys is still not well understood. Therefore, the effect of oxygen on the mechanical functionalities such as strength-ductility balance, hardness, and Young’s modulus in Ti-29nb-13Ta-4.6Zr was investigated.

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