نتایج جستجو برای: oxygen level

تعداد نتایج: 1265979  

Journal: :Biological Psychiatry: Cognitive Neuroscience and Neuroimaging 2018

Journal: :Applied and environmental microbiology 1987
D Hernandez J J Rowe

Oxygen had an immediate and reversible inhibitory effect on nitrate respiration by denitrifying cultures of Pseudomonas aeruginosa. Inhibition of nitrate utilization by oxygen appeared to be at the level of nitrate uptake, since nitrate reduction to nitrite in cell extracts was not affected by oxygen. The degree of oxygen inhibition was dependent on the concentration of oxygen, and increasing n...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2004
P M Matthews P Jezzard

Blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) is a powerful approach to defining activity in the healthy and diseased human brain. BOLD fMRI detects local increases in relative blood oxygenation that are most probably a direct consequence of neurotransmitter action and thus reflect local neuronal signalling. The method allows localisation to volumes of th...

2017
Zening Fu Yiheng Tu Xin Di Bharat B. Biswal Vince D. Calhoun Zhiguo Zhang

Functional brain imaging has revealed two types of dynamic patterns of brain in the resting-state: the dynamics of spontaneous brain activities and the dynamics of functional interconnections between spontaneous brain activities. Although these two types of brain dynamics are usually investigated separately in the literature, recent functional magnetic resonance imaging (fMRI) studies have show...

Journal: :Progress in Neuro-Psychopharmacology and Biological Psychiatry 2011

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