Results 21 to 30 of about 4,263,798 (432)

EFFECT OF HYDROGEN ION AND OXYGEN CONCENTRATIONON RESPIRATION PHYSIOLOGY ON SEAWATER SNAILPLANAXIS SULCATUS [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2012
The effect of some exogenous factors such as oxygen concentration and hydrogen ions concentration on the rate of oxygen consumption of seawater snail Planaxis sulcatus .
JASSIM M. ALI, SUADOD O. AL-KHATEEB
doaj   +1 more source

Free Radical Properties, Source and Targets, Antioxidant Consumption and Health

Oxygen, 2022
Free radicals have acquired growing importance in the fields of biology and medicine. They are produced during many different endogenous and exogenous processes.
G. Martemucci, C. Costagliola, M. Mariano, L. D’andrea, P. Napolitano, A. D’Alessandro   +5 more
semanticscholar   +1 more source

May oxygen depletion explain the FLASH effect? A chemical track structure analysis [PDF]

, 2021
Background and purpose: Recent observations in animal models show that ultra-high dose rate ("FLASH") radiation treatment significantly reduces normal tissue toxicity maintaining an equivalent tumor control. The dependence of this "FLASH" effect on target oxygenation has led to the assumption that oxygen "depletion" could be its major driving force ...
arxiv   +1 more source

Baseline oxygen consumption decreases with cortical depth.

PLoS Biology, 2022
The cerebral cortex is organized in cortical layers that differ in their cellular density, composition, and wiring. Cortical laminar architecture is also readily revealed by staining for cytochrome oxidase-the last enzyme in the respiratory electron ...
Philipp Mächler, Natalie Fomin-Thunemann, Martin Thunemann, Marte Julie Sætra, Michèle Desjardins, Kıvılcım Kılıç, Layth N Amra, Emily A Martin, Ichun Anderson Chen, Ikbal Şencan-Eğilmez, Baoqiang Li, Payam Saisan, John X Jiang, Qun Cheng, Kimberly L Weldy, David A Boas, Richard B Buxton, Gaute T Einevoll, Anders M Dale, Sava Sakadžić, Anna Devor   +20 more
doaj   +1 more source

Oxygen depletion hypothesis remains controversial: a mathematical model of oxygen depletion during FLASH radiation [PDF]

Radiation Research . 2022. 197(2):175-183, 2020
Background: Experiments have reported low normal tissue toxicities during FLASH radiation, but the mechanism has not been elaborated. Several hypotheses have been proposed to explain the mechanism. The oxygen depletion hypothesis has been introduced and mostly studied qualitatively.
arxiv   +1 more source

Anaesthesia-Specifi c Oxygen Transport Assessment in Robot-Assisted Pelvic Surgery: a Clinical Trial

Креативная хирургия и онкология, 2021
Background. Robot-assisted pelvic surgery rapidly becomes a choice in surgeries for gynaecological oncology and urology. These interventions require special settings (pneumoperitonaeum and Trendelenburg position), which inevitably and systemically impact
I. I. Lutfarakhmanov, S. T. Lazarev, N. A. Zdorik, A. D. Lifanova, A. A. Grazhdankin, I. R. Galeev, I. I. Musin, P. I. Mironov, V. N. Pavlov   +8 more
doaj   +1 more source

Well-posedness and singularity formation for inviscid Keller-Segel-fluid system of consumption type [PDF]

, 2021
We consider the Keller-Segel system of consumption type coupled with an incompressible fluid equation. The system describes the dynamics of oxygen and bacteria densities evolving within a fluid. We establish local well-posedness of the system in Sobolev spaces for partially inviscid and fully inviscid cases. In the latter, additional assumptions on the
arxiv   +1 more source

Measuring and Modeling Oxygen Transport and Consumption in 3D Hydrogels Containing Chondrocytes and Stem Cells of Different Tissue Origins

Frontiers in Bioengineering and Biotechnology, 2021
Understanding how the local cellular environment influences cell metabolism, phenotype and matrix synthesis is crucial to engineering functional tissue grafts of a clinically relevant scale.
Simon F. Carroll, Simon F. Carroll, Conor T. Buckley, Conor T. Buckley, Conor T. Buckley, Conor T. Buckley, Daniel J. Kelly, Daniel J. Kelly, Daniel J. Kelly, Daniel J. Kelly   +9 more
doaj   +1 more source

Substantial oxygen consumption by aerobic nitrite oxidation in oceanic oxygen minimum zones

Nature Communications, 2021
Oxygen is fundamental for marine life, yet it is absent from large areas of the ocean. Here the authors demonstrate that microbial nitrite oxidation effectively consumes oxygen where oxygen concentrations are low, playing a pivotal role in these regions.
J. M. Beman, S. M. Vargas, J. M. Wilson, E. Perez-Coronel, J. S. Karolewski, S. Vazquez, A. Yu, A. E. Cairo, M. E. White, I. Koester, L. I. Aluwihare, S. D. Wankel   +11 more
doaj   +1 more source

Sources of variation in oxygen consumption of aquatic animals demonstrated by simulated constant oxygen consumption and respirometers of different sizes.

Journal of Fish Biology, 2016
As intermittent-flow respirometry has become a common method for the determination of resting metabolism or standard metabolic rate (SMR), this study investigated how much of the variability seen in the experiments was due to measurement error ...
M. B. Svendsen, P. Bushnell, E. A. Christensen, J. Steffensen   +3 more
semanticscholar   +1 more source