scholarly journals ACTION OF METHYLENE BLUE ON BODY TEMPERATURE AND METABOLISM

1931 ◽  
Vol 54 (6) ◽  
pp. 827-845 ◽  
Author(s):  
P. E. Gregoire
Keyword(s):  
Methylene Blue ◽  
Body Temperature ◽  
Partial Pressure ◽  
Pulmonary Edema ◽  
Environmental Temperature ◽  
Partial Pressure Of Oxygen ◽  
White Rats ◽  
High Partial Pressure ◽  
Lower Temperature

1. Methylene blue injected intravenously in white rats is hyperthermizing or hypothermizing according to the environmental temperature. 2. It causes an increase in metabolism at 28°C. or above. At lower temperature it does not affect, or rather depresses, metabolism. 3. It does not seem likely that its hypermetabolic action is due to catalysis of cell oxidations. 4. In animals exposed to an atmosphere with a high partial pressure of oxygen, methylene blue causes pulmonary edema, much more rapidly than does oxygen alone.

Learning in hypothermic rats

1963 ◽  
Vol 18 (5) ◽  
pp. 1016-1018 ◽  
Author(s):  
J. A. Panuska ◽  
Vojin Popovic
Keyword(s):  
Body Temperature ◽  
Temperature Regulation ◽  
Operant Behavior ◽  
Environmental Temperature ◽  
Experimental Situation ◽  
External Heat ◽  
Body Temperatures ◽  
White Rats ◽  
Survival Studies ◽  
Colonic Temperature

Inexperienced shaved adult white rats cooled to a colonic temperature of 18.5 C and then rewarmed to 26.0 C, were placed at an ambient temperature of 2.0 C with the possibility of using a lever-activated heat reinforcement apparatus. Their body temperatures leveled at 29 C; and during the next 40–80 min the rats either learned to press the lever systematically for external heat and thereby rewarmed themselves to euthermia, or they drifted into deeper hypothermia leading to death. Activity records and visual observations indicate that after an average of 48 min and at a body temperature of 29.6 C (28.5–30.2 C), out of a group of 14 rats 12 learned this technique necessary for their survival. All 12 rats reached euthermia and continued to use the lever as long as they remained in the experimental situation. It is concluded that learning is possible even at a low body temperature of 29.6 C. performance; heat reinforcement; temperature regulation; body temperature; environmental temperature; operant behavior; survival studies; motivation; physiology of learning; cold physiology Submitted on March 7, 1963

Isolation and characterization of n-butane-utilizing microorganisms

1972 ◽  
Vol 18 (8) ◽  
pp. 1191-1195 ◽  
Author(s):  
A. G. McLee ◽  
Agnes C. Kormendy ◽  
M. Wayman
Keyword(s):  
Partial Pressure ◽  
Growth Rates ◽  
Bacterial Isolates ◽  
Partial Pressure Of Oxygen ◽  
Bacterial Strains ◽  
Isolation And Characterization ◽  
Partial Pressures ◽  
High Partial Pressure

Fifteen bacterial strains and four molds capable of growth on n-butane were isolated and partially classified. The bacteria were mostly Arthrobacter sp. and Brevibacterium sp.; among the molds, Penicillium nigricans, Allescheria boydii, and Graphium cumeiferum were identified, while the remaining mold had the appearance of Gliocladium, but was not firmly identified. Although able to grow on other alkanes and orthodox media, the bacterial isolates could not use methane. Growth rates on n-butane were unaffected by varying air or substrate partial pressures in the range of 10–90% atmosphere. High partial pressure of oxygen was inhibitory to most bacterial isolates, the degree of inhibition varying widely, however. Growth rates on n-butanol and on glucose were significantly higher than those on n-butane. Among the molds, only the Graphium would grow well in submerged, shaking culture.

scholarly journals Dialysate with High Partial Pressure of Oxygen Enhances Oxygenation in Blood during Simulated Circulation of Hemodialysis

2012 ◽  
Vol 1 (0) ◽  
pp. 43-46 ◽  
Author(s):  
Yoshihiro TANGE ◽  
Heihachi MIGITA ◽  
Shigenori YOSHITAKE ◽  
Yutaka ISAKOZAWA ◽  
Shingo TAKESAWA ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Partial Pressure Of Oxygen ◽  
High Partial Pressure

scholarly journals Effect of Oxygen Mole Fraction on Static Properties of Pressure-Sensitive Paint

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1062
Author(s):  
Tomohiro Okudera ◽  
Takayuki Nagata ◽  
Miku Kasai ◽  
Yuji Saito ◽  
Taku Nonomura ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Mole Fraction ◽  
Ambient Pressure ◽  
Low Pressure ◽  
Pressure Sensitive Paint ◽  
Partial Pressure Of Oxygen ◽  
Static Properties ◽  
Pressure Sensitive ◽  
High Partial Pressure ◽  
Oxygen Mole Fraction

The effects of the oxygen mole fraction on the static properties of pressure-sensitive paint (PSP) were investigated. Sample coupon tests using a calibration chamber were conducted for poly(hexafluoroisopropyl methacrylate)-based PSP (PHFIPM-PSP), polymer/ceramic PSP (PC-PSP), and anodized aluminum PSP (AA-PSP). The oxygen mole fraction was set to 0.1–100%, and the ambient pressure (Pref) was set to 0.5–140 kPa. Localized Stern–Volmer coefficient Blocal increased and then decreased with increasing oxygen mole fraction. Although Blocal depends on both ambient pressure and the oxygen mole fraction, its effect can be characterized as a function of the partial pressure of oxygen. For AA-PSP and PHFIPM-PSP, which are low-pressure- and relatively low-pressure-type PSPs, respectively, Blocal peaks at PO2ref<12 kPa. In contrast, for PC-PSP, which is an atmospheric-pressure-type PSP in the investigated range, Blocal does not have a peak. Blocal has a peak at a relatively high partial pressure of oxygen due to the oxygen permeability of the polymer used in the binder. The peak of SPR, which is the emission intensity change with respect to normalized pressure fluctuation, appears at a lower partial pressure of oxygen than that of Blocal. This is because the intensity of PSP becomes quite low at a high partial pressure of oxygen even if Blocal is high. Hence, the optimal oxygen mole fraction depends on the type of PSP and the ambient pressure range of the experiment. This optimal value can be found on the basis of the partial pressure of oxygen.

Action Mechanism of β-Si3N4 in Bauxite Sintering

2014 ◽  
Vol 543-547 ◽  
pp. 3834-3838
Author(s):  
Jun Hong Chen ◽  
Bin Li ◽  
Hua Sheng Zhan ◽  
Jin Dong Su ◽  
Ming Wei Yan ◽  
...  
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Partial Pressure ◽  
Sodium Oxide ◽  
Potassium Oxide ◽  
Oxide Content ◽  
Partial Pressure Of Oxygen ◽  
Action Mechanism ◽  
High Potassium ◽  
High Partial Pressure

In this paper, we added silicon nitride in the samples of common bauxite and the bauxite with high potassium and sodium oxide content, treated them at the high temperature of 1,400°Cand 1,500°C, and then conducted analysis with XRD, SEM and EDS. The results are as follows: After adding β-Si3N4 in sintered bauxite, the partial pressure of oxygen in the composite materials will be reduced, the decomposition and volatilization of compounds with high partial pressure of oxygen (such as potassium oxide and sodium oxide) will be promoted, the content of these compounds in the bauxite will be lowered, and the hazards of the compounds with low melting point will be weakened; meanwhile, with the reduction of potassium, sodium and iron oxide, the lattice of alumina will be activated, the β-Sialon phase will be easily formed and the high temperature properties of sintered bauxite materials will be strengthened.

ARTIFICIAL HYPOBIOSIS AS A METHOD TO MITIGATE THE NEGATIVE EFFECT OF OXYGEN AT AN ELEVATED PARTIAL PRESSURE

2021 ◽  
Vol 55 (5) ◽  
pp. 64-68
Author(s):  
A.F. Makarov ◽  
◽  
M.A. Kotsky ◽  
А.А. Ton'shin ◽  
I.V. Bukhtiyarov ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Gas Pressure ◽  
Pressure Reduction ◽  
Partial Pressure Of Oxygen ◽  
High Partial Pressure ◽  
Artificial Hypobiosis ◽  
Negative Effect ◽  
Effect Of Oxygen

To assess how hypobiosis modifies the negative effect of a high partial pressure of oxygen, goldhamsters were put into artificial hypobiosis followed by a simulated O2 poisoning at absolute gas pressure of 7 kgf/cm2. The experiment showed an increase in 1.4 times (p = 0.0579) of the period preceding convulsions; reduction in 3.7 times (p = 0.0009) of the period of stabilization on return to normal O2 pressure, reduction of the total convulsions period in 2.3 times (p = 0.0003).

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