scholarly journals The role of lead and excess oxygen in uranite

1957 ◽  
Author(s):  
Robert Morris Berman
Keyword(s):  
Excess Oxygen

Vibrational Energy Transfer in Carbon Monoxide

1972 ◽  
Vol 50 (9) ◽  
pp. 889-897 ◽  
Author(s):  
P. H. Dawson ◽  
W. G. Tam
Keyword(s):  
Energy Exchange ◽  
Vibrational Energy ◽  
Transverse Flow ◽  
Vibration Energy ◽  
Excess Oxygen ◽  
Experimental Measurements ◽  
Energy Distributions ◽  
Vibrationally Excited ◽  
Population Distributions

The role of V–V processes in vibrationally excited CO systems in the longitudinal and transverse flow chemical lasers is studied. Initial vibrational energy distributions of CO formed by the O + CS reaction are deduced from chemiluminescent data using calculated values of the vibration energy exchange probabilities. The time evolution of the population distributions is then obtained by computer simulation. The results are compared with experimental measurements. The effects of excess oxygen and of "cold" CO on the population distributions are also discussed.

Neutron structural study of the Bi-monolayer compound (Bi0.5Cu0.5)Sr2(Y0.8Cu0.2)Cu2O7 + ??the Role of excess oxygen in superconductivity

1994 ◽  
Vol 7 (5) ◽  
pp. 857-863 ◽  
Author(s):  
I. K. Gopalakrishnan ◽  
H. Rajagopal ◽  
J. V. Yakhmi ◽  
A. Sequeira ◽  
R. M. Iyer
Keyword(s):  
Structural Study ◽  
Excess Oxygen

Adenosine as a mediator of postcontraction hyperemia in dog gracilis muscle

1984 ◽  
Vol 246 (2) ◽  
pp. H274-H282 ◽  
Author(s):  
J. M. Kille ◽  
R. E. Klabunde
Keyword(s):  
Linear Regression ◽  
Muscular Contraction ◽  
Saline Control ◽  
Excess Oxygen ◽  
Regression Analyses ◽  
Time Integral ◽  
Transport Inhibitor ◽  
Tension Time ◽  
Adenosine Transport

The role of adenosine in postcontraction hyperemia (PCH) following sustained, maximal isometric contractions was studied in free-flowing dog gracilis muscles. The hemodynamic responses to contraction were examined in the presence and absence of dipyridamole (an adenosine transport inhibitor), erythro-9-(2-hydroxy-3-nonyl)adenine (EHNA, an adenosine deaminase inhibitor), or alpha, beta-methyleneadenosine-5'-diphosphate (AOPCP, an inhibitor of 5'-nucleotidase). Each muscle was stimulated to contract for 1, 3, 5, and 10 s during saline and drug infusions. For each contraction, the tension-time integral (TT), excess flow (EQ), and excess oxygen consumption (EVo2) were computed. Linear regression analyses were then performed on EQ vs. TT, EVo2 vs. TT, and EQ vs. EVo2. An alteration of the PCH response by the drug was determined as any significant change from the saline control in the slope of the linear regression of EQ vs. EVo2. Dipyridamole and EHNA caused increases of 73 and 48%, respectively, in the slope of EQ vs. EVo2, whereas AOPCP decreased the slope by 41%. The changes in the PCH produced by these drugs are consistent with the hypothesis that an increase in interstitial adenosine during muscular contraction contributes to PCH.

Benzene Radical Cation Formation on Hydrogen Mordenite. The Role of Adsorbed Oxygen

1972 ◽  
Vol 50 (13) ◽  
pp. 2041-2046 ◽  
Author(s):  
N. H. Sagert ◽  
R. M. L. Pouteau ◽  
M. G. Bailey ◽  
F. P. Sargent
Keyword(s):  
Cation Radical ◽  
Radical Cations ◽  
Acid Sites ◽  
Excess Oxygen ◽  
Oxygen Treatment ◽  
Chemisorbed Oxygen ◽  
Water Of Hydration ◽  
Initial Spectrum ◽  
A Site

The e.p.r. spectrum of benzene on hydrogen mordenite (Zeolon H) has been studied as a function of coverage, degassing temperature, and hydrogen and oxygen treatment. The initial spectrum observed was that due to the benzene cation radical dimer. The maximum number of spins was formed when the solid was completely saturated with benzene. Large yields were obtained only when the zeolitic water and water of hydration of the protons were removed. The largest yields were observed where significant dehydroxylation had occurred. Chemisorbed oxygen was essential, and there was a 1:1.2 ratio between the maximum number of spins observed in the presence of excess oxygen and the amount of oxygen chemisorbed. The largest concentration of radical cations noted (2 × 1018/g) was much smaller than the number of acid sites known to be present (1021/g). In fact, only one unit cell of the hydrogen mordenite in 100 had a site capable of oxidizing benzene to the cation. Hence these sites must be in special positions in the solid.

The role of excess oxygen for modeling high-Mn, low-Ca garnets in metapelites from the northern Central Metasedimentary Belt of the Grenville Province, Ontario, Canada

2021 ◽  
Vol 58 (1) ◽  
pp. 21-37
Author(s):  
Erik Duesterhoeft ◽  
Peter Raase ◽  
Manuel Duguet ◽  
Robert Michael Easton
Keyword(s):  
Field Gradient ◽  
Crustal Thickening ◽  
Excess Oxygen ◽  
Rock Composition ◽  
Grenville Province ◽  
Metamorphic History ◽  
Direct Pressure ◽  
Thrust Zone ◽  
History Of

The Bancroft terrane and the associated Central Metasedimentary Belt boundary thrust zone represent the northern part of the Central Metasedimentary Belt (CMB) of the Canadian Grenville Province. Only a few direct pressure and temperature calculations based on phase equilibrium petrology methods exist in the central Bancroft terrane, and this study applies thermodynamic approaches such as garnet isopleth geothermobarometry to fill this gap and investigate the metamorphic history of the northern CMB. Four metapelitic rock samples were collected in the vicinity of the enigmatic Bancroft shear zone, which approximates the border between the Bancroft terrane and the Elzevir terrane to the south. Garnet isopleths for these samples only intersect if a certain amount of excess oxygen is added to the bulk rock composition corresponding to a Fe3+/Fetot ratio of 0.33–0.38. The northernmost sample records metamorphic peak conditions of approximately 1 GPa and 780 °C, whereas the southernmost sample, which is located in the Elzevir terrane, records a peak metamorphic pressure of approximately 0.9 GPa at a temperature of 520 °C. The latter result contradicts previous pressure estimates of the region and the proposed metamorphic field gradient but is based on a poorly constrained sample in terms of thermodynamic modeling. Hence, we conclude that the metamorphic field gradient in the northern CMB conceals two different P–T trajectories. Such a scenario is commonly observed in crustal thickening models and suggests that the cold upper plate (Elzevir terrane) was thrust over the warm lower plate (Bancroft terrane) in a northwesterly direction.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management

The power of norms to sway fused group members

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam
Keyword(s):  
Evolutionary Anthropology ◽  
Normative Systems ◽  
Violent Extremism ◽  
Identity Fusion ◽  
Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

The role of affect in feelings of obligation

2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish
Keyword(s):  
Positive Emotions ◽  
The Creation ◽  
Sense Of Obligation

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.

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