Influence of Low Oxygen Content on the Recrystallization Behavior of Rolled Copper Foil

In this work, the effect of sintering atmosphere on the corrosion resistance of sintered titanium has been evaluated in 0.9 % aqueous NaCl solution to simulate physiological environment. Corrosion tests were performed on titanium porous sintered under vacuum and vacuum plus dynamic argon. The results showed better passive properties associated to the titanium sintered under argon plus vacuum atmosphere than to the vacuum sintered titanium. The better corrosion resistance of the argon plus vacuum sintered titanium was attributed to the formation of a thin passive film on the titanium surface during sintering due the low oxygen content present in this atmosphere.

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Thermal degradation of polyethylene in a nitrogen atmosphere of low oxygen content. II. Structural changes occurring in low-density polyethylene at an oxygen content less than 0.0005%

Journal of Applied Polymer Science ◽

10.1002/app.1974.070181023 ◽

1974 ◽

Vol 18 (10) ◽

pp. 3179-3179

Author(s):

Arne Holmström ◽

Erling Sörvik

Keyword(s):

Thermal Degradation ◽

Oxygen Content ◽

Structural Changes ◽

Nitrogen Atmosphere ◽

Low Density Polyethylene ◽

Low Density ◽

Low Oxygen

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THE MORPHOLOGICAL CHANGES IN THE TISSUES OF THE RABBIT AS A RESULT OF REDUCED OXIDATION

Journal of Experimental Medicine ◽

10.1084/jem.27.3.399 ◽

1918 ◽

Vol 27 (3) ◽

pp. 399-412 ◽

Cited By ~ 20

Author(s):

H. G. Martin ◽

A. S. Loevenhart ◽

C. H. Bunting

Keyword(s):

Carbon Dioxide ◽

Oxygen Content ◽

Morphological Changes ◽

Low Oxygen ◽

High Carbon ◽

Red Bone Marrow ◽

Hydropic Degeneration ◽

Thyroid Hyperplasia ◽

High Carbon Dioxide ◽

Stimulation Of

Exposure of rabbits to an atmosphere of low oxygen content results in a stimulation of the cardiorespiratory systems, in an extension (hyperplasia) of red bone marrow and probably of a thyroid hyperplasia, with the further production of hydropic and hyaline degeneration in the cells of the parenchymatous organs. An atmosphere of high carbon dioxide and normal oxygen content produces, however, a stimulation of the cardiorespiratory systems, but no marrow extension and, in the concentrations used, but slight hydropic degeneration in the parenchyma of the glandular organs.

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The Function of the Gills of Mayfly Nymphs from Different Habitats

Journal of Experimental Biology ◽

10.1242/jeb.16.3.363 ◽

1939 ◽

Vol 16 (3) ◽

pp. 363-373 ◽

Cited By ~ 2

Author(s):

C. A. WINGFIELD

Keyword(s):

Oxygen Consumption ◽

Oxygen Content ◽

The Body ◽

Gaseous Exchange ◽

Low Oxygen ◽

Respiratory Mechanism ◽

Tracheal Gills ◽

Cloeon Dipterum ◽

Gill Function ◽

Oxygen Concentrations

1. The oxygen consumption of normal and gill-less nymphs of the mayflies Baetis sp., Cloeon dipterum and Ephemera vulgata has been measured at various oxygen concentrations. 2. It has been found that over the complete range of oxygen concentrations studied, the tracheal gills do not aid oxygen consumption in Baetis sp. In Cloeon dipterum, at all oxygen concentrations tested, no gaseous exchange takes place through the gills; at low oxygen concentrations, however, the gills function as an accessory respiratory mechanism in ventilating the respiratory surface of the body and so aid oxygen consumption. In Ephemera Vulgata the gills aid oxygen consumption even at high oxygen concentrations. In this species the gills may function both as true respiratory organs and as a ventilating mechanism. 3. It is shown that the differences in gill function can be related to the oxygen content of the habitat of each species.

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Thermodynamic Characteristics of Y2O3 and Y2S3 Nonmetallic Phase Formed in Liquid Steel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.844.9 ◽

2020 ◽

Vol 844 ◽

pp. 9-23

Author(s):

Sergii Gerasin ◽

Dorota Kalisz ◽

Jerzy Iwanciw

Keyword(s):

Oxygen Content ◽

Molten Steel ◽

Liquid Steel ◽

Thermodynamic Characteristics ◽

Phase Precipitation ◽

Low Oxygen ◽

Metallic Oxide ◽

Metal Bath ◽

Metallic Inclusions ◽

The Relationship

The current work deals the phenomenon of non-metallic inclusions as a result of the addition of Yttrium as an alloying component. The order of introducing individual components determines its final content in steel. This problem was analyzed using the WYK_Stal program developed at AGH-UST. Individual cases were considered using the accepted thermodynamics models based on Wagner’s formalism. The study of Y2O3 and Y2S3 phase precipitation and the relationship between the addition of Y, Al, Ca, O and S in molten steel was studied using the thermodynamic models. Based on the simulation, the authors stated that, the introduction of aluminum as the final deoxidizer into the liquid steel before the yttrium, results in the formation of non-metallic oxide inclusions. The low oxygen content in the metal bath promotes the formation of yttrium sulphide. In the case of calcium dosing, it is reasonable that, the yttrium is introduced after this element, which limits the losses on the formation of the yttrium sulphide phase.

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Graphene Oxide Oxygen Content Affects Physical and Biological Properties of Scaffolds Based on Chitosan/Graphene Oxide Conjugates

Materials ◽

10.3390/ma12071142 ◽

2019 ◽

Vol 12 (7) ◽

pp. 1142 ◽

Cited By ~ 7

Author(s):

Iolanda Francolini ◽

Elena Perugini ◽

Ilaria Silvestro ◽

Mariangela Lopreiato ◽

Anna Scotto d’Abusco ◽

...

Keyword(s):

Graphene Oxide ◽

Mechanical Strength ◽

Oxygen Content ◽

Mechanical Stability ◽

Biological Properties ◽

Dermal Fibroblasts ◽

Porous Scaffolds ◽

Low Oxygen ◽

Interdisciplinary Field

Tissue engineering is a highly interdisciplinary field of medicine aiming at regenerating damaged tissues by combining cells with porous scaffolds materials. Scaffolds are templates for tissue regeneration and should ensure suitable cell adhesion and mechanical stability throughout the application period. Chitosan (CS) is a biocompatible polymer highly investigated for scaffold preparation but suffers from poor mechanical strength. In this study, graphene oxide (GO) was conjugated to chitosan at two weight ratios 0.3% and 1%, and the resulting conjugates were used to prepare composite scaffolds with improved mechanical strength. To study the effect of GO oxidation degree on scaffold mechanical and biological properties, GO samples at two different oxygen contents were employed. The obtained GO/CS scaffolds were highly porous and showed good swelling in water, though to a lesser extent than pure CS scaffold. In contrast, GO increased scaffold thermal stability and mechanical strength with respect to pure CS, especially when the GO at low oxygen content was used. The scaffold in vitro cytocompatibility using human primary dermal fibroblasts was also affected by the type of used GO. Specifically, the GO with less content of oxygen provided the scaffold with the best biocompatibility.

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