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51,832 Results Found

  • Article
  • Open Access
9 Citations
3,659 Views
16 Pages

15 March 2022

The Cu-based oxygen carrier is a promising material in the chemical looping with oxygen uncoupling (CLOU) process, while its performance in the CLOU is significantly dependent on the oxygen release properties. However, the study of oxygen release mec...

  • Article
  • Open Access
2,344 Views
11 Pages

18 November 2022

An oxygen pump sensor was constructed using yttria-stabilized zirconia, which is an oxide ion conductor, and oxygen was discharged from steam to generate hydrogen. The oxygen pump sensor consisted of a pump that discharges oxygen and a sensor that co...

  • Editorial
  • Open Access
12 Citations
5,235 Views
6 Pages

Oxygen: A Stimulus, Not “Only” a Drug

  • Costantino Balestra and
  • Jacek Kot

25 October 2021

Depending on the oxygen partial pressure in a tissue, the therapeutic effect of oxygenation can vary from simple substance substitution up to hyperbaric oxygenation when breathing hyperbaric oxygen at 2.5–3.0 ATA. Surprisingly, new data showed that i...

  • Article
  • Open Access
1 Citations
2,156 Views
11 Pages

29 June 2023

Oxygen nozzles play an important role in aircraft oxygen systems, and the oxygen valve is one of the most important components of the oxygen nozzle. In order to investigate the ignition source of three fires of a certain type of aircraft, combustion...

  • Review
  • Open Access
1 Citations
1,416 Views
16 Pages

Does Oxygen Work? Evidence for Oxygenation During Kidney Graft Preservation: A Review

  • Andres Calva Lopez,
  • Jose Enrique Robles Garcia,
  • Carlos Andres Yanez Ruiz,
  • Mario Daniel Tapia Tapia,
  • Vanessa Talavera Cobo,
  • Carmina Alejandra Muñoz Bastidas,
  • Bernardino Miñana Lopez and
  • Daniel Sanchez Zalabardo

13 March 2025

Kidney transplantation (KT) is the gold-standard treatment of end-stage kidney disease (ESKD). Traditional preservation methods, such as static cold storage (SCS), have been replaced by modern and more effective preservation methods, especially hypot...

  • Article
  • Open Access
4 Citations
3,737 Views
12 Pages

Portable Oxygen Therapy: Is the 6-Minute Walking Test Overestimating the Actual Oxygen Needs?

  • Daniel Sanchez-Morillo,
  • Alejandro Lara-Doña,
  • Blanca Priego-Torres,
  • Maria Morales-Gonzalez,
  • Francisca Montoro-Ballesteros and
  • Antonio Leon-Jimenez

11 December 2020

The appropriate titration for the personalized oxygen needs of patients with chronic obstructive pulmonary disease (COPD) and severe hypoxemia is a determining factor in the success of long-term oxygen therapy. There are no standardized procedures to...

  • Article
  • Open Access
12 Citations
4,211 Views
14 Pages

Sodium Borohydride Treatment to Prepare Manganese Oxides with Oxygen Vacancy Defects for Efficient Oxygen Reduction

  • Shuo Sun,
  • Haoran Yu,
  • Lanlan Li,
  • Xiaofei Yu,
  • Xinghua Zhang,
  • Zunming Lu and
  • Xiaojing Yang

21 June 2022

Manganese oxides are often used as catalysts for oxygen reduction reactions due to their low price and high stability, and they have been extensively studied. However, the poor electrical conductivity and low intrinsic activity of manganese oxides re...

  • Review
  • Open Access
23 Citations
6,763 Views
28 Pages

The Ambiguous Aspects of Oxygen

  • Gaetana Napolitano,
  • Gianluca Fasciolo and
  • Paola Venditti

14 September 2022

For most living beings, oxygen is an essential molecule for survival, being the basis of biological oxidations, which satisfy most of the energy needs of aerobic organisms. Oxygen can also behave as a toxic agent posing a threat to the existence of l...

  • Article
  • Open Access
2,763 Views
15 Pages

We have developed a dissolved oxygen (DO) method with differential equation (DE) correction. We measured the oxygen content in La-based and Y-based superconductors, and succeeded in measuring the oxygen content simply in one-third of the time require...

  • Proceeding Paper
  • Open Access
205 Views
5 Pages

Veterinary Blood Oxygen Detection

  • Kimberly Mpala and
  • Trudi-Heleen Joubert

28 November 2025

A multimodal sensor was developed to record dissolved oxygen, L*a*b* colour, temperature, and pH. This work builds on an existing model that correlates blood oxygen saturation with L*a*b* colour values. An L*a*b* colour sensor was constructed from an...

  • Article
  • Open Access
2 Citations
769 Views
8 Pages

Comparison of Results of Sequential Home Oxygen Therapy Inpatients Using Stationary or Portable Oxygen Sources

  • Małgorzata Czajkowska-Malinowska,
  • Beata Połtyn,
  • Anna Ciesielska,
  • Katarzyna Kruża and
  • Paweł Jesionka

19 June 2012

Introduction: Home-based oxygen therapy (long-term oxygen therapy, LTOT) uses two sources of oxygen: stationaryoxygen concentrator (OC) or portable liquid oxygen system (LO). Polish National Healthcare System reimburses only...

  • Article
  • Open Access
6 Citations
3,606 Views
10 Pages

Remarkably Enhanced Lattice Oxygen Participation in Perovskites to Boost Oxygen Evolution Reaction

  • Aditya Narayan Singh,
  • Amir Hajibabaei,
  • Muhammad Hanif Diorizky,
  • Qiankai Ba and
  • Kyung-Wan Nam

27 February 2023

Enhancing the participation of the lattice oxygen mechanism (LOM) in several perovskites to significantly boost the oxygen evolution reaction (OER) is daunting. With the rapid decline in fossil fuels, energy research is turning toward water splitting...

  • Article
  • Open Access
2 Citations
2,788 Views
11 Pages

Estimating Coronary Sinus Oxygen Saturation from Pulmonary Artery Oxygen Saturation

  • Alexander Gall,
  • Hosamadin S. Assadi,
  • Rui Li,
  • Zia Mehmood,
  • Bahman Kasmai,
  • Gareth Matthews and
  • Pankaj Garg

16 November 2024

Background and Objectives: Coronary sinus oxygen saturation is a useful indicator of health and disease states. However, it is not routinely used in clinical practice. Cardiovascular magnetic resonance imaging (CMR) oximetry can accurately estimate o...

  • Article
  • Open Access
5 Citations
2,860 Views
11 Pages

2 April 2023

Interaction of molecular oxygen 3O2 with the flavin-dependent protein miniSOG after light illumination results in creation of singlet oxygen 1O2 and superoxide O2●−. Despite the recently resolved crystal structures of miniSOG variants, ox...

  • Article
  • Open Access
13 Citations
3,134 Views
12 Pages

Platelets in Fetal Growth Restriction: Role of Reactive Oxygen Species, Oxygen Metabolism, and Aggregation

  • Joanna Nowaczyk,
  • Barbara Poniedziałek,
  • Piotr Rzymski,
  • Dominika Sikora and
  • Mariola Ropacka-Lesiak

18 February 2022

Fetal growth restriction (FGR) is mainly caused by failure of the uteroplacental unit. The exact pathogenesis remains unclear. The cause is thought to be related to abnormal platelet activation, which may result in microthrombus formation in the smal...

  • Article
  • Open Access
2 Citations
2,679 Views
13 Pages

19 June 2024

Developing cost-effective and highly active electrocatalysts for the oxygen evolution reaction (OER) is crucial for advancing sustainable energy applications. High-entropy alloys (HEAs) made from earth-abundant transition metals, thanks to their rema...

  • Review
  • Open Access
62 Citations
10,427 Views
39 Pages

Significance of Singlet Oxygen Molecule in Pathologies

  • Kazutoshi Murotomi,
  • Aya Umeno,
  • Mototada Shichiri,
  • Masaki Tanito and
  • Yasukazu Yoshida

1 February 2023

Reactive oxygen species, including singlet oxygen, play an important role in the onset and progression of disease, as well as in aging. Singlet oxygen can be formed non-enzymatically by chemical, photochemical, and electron transfer reactions, or as...

  • Article
  • Open Access
14 Citations
3,408 Views
16 Pages

Complex characteristics of the plateau environment such as low oxygen content seriously restrict the exploitation of abundant mineral resources in plateau areas. To regulate the hypoxia environment and improve the comfort of workers engaged in intens...

  • Article
  • Open Access
37 Citations
7,073 Views
15 Pages

A Comparison of Singlet Oxygen Explicit Dosimetry (SOED) and Singlet Oxygen Luminescence Dosimetry (SOLD) for Photofrin-Mediated Photodynamic Therapy

  • Michele M. Kim,
  • Rozhin Penjweini,
  • Nathan R. Gemmell,
  • Israel Veilleux,
  • Aongus McCarthy,
  • Gerald S. Buller,
  • Robert H. Hadfield,
  • Brian C. Wilson and
  • Timothy C. Zhu

6 December 2016

Accurate photodynamic therapy (PDT) dosimetry is critical for the use of PDT in the treatment of malignant and nonmalignant localized diseases. A singlet oxygen explicit dosimetry (SOED) model has been developed for in vivo purposes. It involves the...

  • Article
  • Open Access
21 Citations
4,255 Views
14 Pages

Change of the Chemical and Mineralogical Composition of the Slag during Oxygen Blowing in the Oxygen Converter Process

  • Dana Baricová,
  • Alena Pribulová,
  • Peter Futáš,
  • Branislav Buľko and
  • Peter Demeter

18 October 2018

The article presents the results of the investigation of changes in the chemical and mineralogical composition of slag during steel production in a blown oxygen converter. This process was monitored using the slag samples that were collected during t...

  • Review
  • Open Access
51 Citations
11,788 Views
13 Pages

Photoacoustic Imaging in Oxygen Detection

  • Fei Cao,
  • Zhihai Qiu,
  • Huanhao Li and
  • Puxiang Lai

4 December 2017

Oxygen level, including blood oxygen saturation (sO2) and tissue oxygen partial pressure (pO2), are crucial physiological parameters in life science. This paper reviews the importance of these two parameters and the detection methods for them, focusi...

  • Article
  • Open Access
8 Citations
4,287 Views
14 Pages

Simulation of the Oxygen Permeability of a Composite Container

  • Virginie Defauchy,
  • Hélène Le Corre and
  • Xavier Colin

A kinetic model has been derived from the classical (Fick and Henry’s) laws of the gas theory for predicting the oxygen permeability of a closed composite container, initially filled by pure nitrogen under a pressure slightly higher than the atmosphe...

  • Article
  • Open Access
597 Views
21 Pages

Simulation of Oxygen Diffusion in Lead–Bismuth Eutectic for Gas-Phase Oxygen Management

  • Zhihong Tang,
  • Bin Yang,
  • Wenjun Zhang,
  • Ruohan Chen,
  • Shusheng Guo,
  • Junfeng Li,
  • Liyuan Wang and
  • Xing Huang

Lead–bismuth eutectic (LBE), while advantageous for advanced nuclear reactors due to its thermophysical properties, faces oxidation and corrosion challenges during operation. This study aims to optimize gas-phase oxygen control by computational...

  • Article
  • Open Access
5 Citations
2,197 Views
12 Pages

Synthesis of High-Entropy Perovskite Hydroxides as Bifunctional Electrocatalysts for Oxygen Evolution Reaction and Oxygen Reduction Reaction

  • Sangwoo Chae,
  • Akihito Shio,
  • Tomoya Kishida,
  • Kosuke Furutono,
  • Yumi Kojima,
  • Gasidit Panomsuwan and
  • Takahiro Ishizaki

17 June 2024

Oxygen reduction reaction (ORR) and oxygen evolutionc reaction (OER) are important chemical reactions for a rechargeable lithium–oxygen battery (LOB). Recently, high-entropy alloys and oxides have attracted much attention because they showed go...

  • Review
  • Open Access
44 Citations
6,866 Views
15 Pages

Oxygen Transport during Ex Situ Machine Perfusion of Donor Livers Using Red Blood Cells or Artificial Oxygen Carriers

  • Silke B. Bodewes,
  • Otto B. van Leeuwen,
  • Adam M. Thorne,
  • Bianca Lascaris,
  • Rinse Ubbink,
  • Ton Lisman,
  • Diethard Monbaliu,
  • Vincent E. De Meijer,
  • Maarten W. N. Nijsten and
  • Robert J. Porte

28 December 2020

Oxygenated ex situ machine perfusion of donor livers is an alternative for static cold preservation that can be performed at temperatures from 0 °C to 37 °C. Organ metabolism depends on oxygen to produce adenosine triphosphate and temperature...

  • Article
  • Open Access
6 Citations
2,493 Views
11 Pages

1 October 2023

Respiratory dysfunction often decreases arterial oxygen content. Four common oxygen delivery techniques—flow-by, nasal prongs, a tight-vented mask, and a tight mask connected to a Venturi valve—were evaluated for their effectiveness in in...

  • Article
  • Open Access
2,152 Views
13 Pages

17 October 2023

In this paper, we investigate the optimization of an oxygen removal system for water electrolysis plants because high oxygen concentrations can be dangerous and compromise the quality of the hydrogen produced. The design of an oxygen removal system w...

  • Article
  • Open Access
2 Citations
6,034 Views
13 Pages

The “Oxygen Sink” of Bamboo Shoots Regulates and Guarantees the Oxygen Supply for Aerobic Respiration

  • Manchang Huang,
  • Aoshun Zhao,
  • Xingcui Ding,
  • Jian Li,
  • Jiajia Zhang,
  • Ruixiang Ma,
  • Zizhang Xiao,
  • Hanjiang Cai,
  • Anke Wang and
  • Yufang Bi

4 May 2023

The amazingly rapid growth of bamboo shoots requires strong respiration and provides a large amount of energy and intermediate metabolites. Strong aerobic respiration requires a large amount of O2. This raises the following question: What is the sour...

  • Article
  • Open Access
53 Citations
9,581 Views
16 Pages

17 February 2017

Dissolved oxygen is an influential factor of aquatic ecosystem health. Future predictions of oxygen deficits are paramount for maintaining water quality. Oxygen demands depend greatly on a waterbody’s attributes. A large sediment–water interface rela...

  • Viewpoint
  • Open Access
267 Views
17 Pages

Precision Oxygen Therapy in the Intensive Care Unit: Matching Oxygen Exposure to Patient Phenotypes

  • Jhon Jairo Botello Jaimes,
  • Angie Katherine Turriago Castañeda,
  • Kevin Fernando Montoya-Quintero and
  • Johana Galván Barrios

12 March 2026

Oxygen therapy is one of the most widely used interventions in critical care, yet it remains poorly individualized. Recent trials and meta-analysis suggest no mortality difference between conservative and liberal oxygen strategies, reinforcing the pe...

  • Article
  • Open Access
1 Citations
1,466 Views
40 Pages

Stream metabolism is traditionally defined as the combined metabolism of all aerobic organisms in a stream. Its component processes of oxygenic photosynthesis and aerobic respiration create and consume dissolved oxygen (DO) and therefore can be measu...

  • Article
  • Open Access
10 Citations
4,115 Views
21 Pages

Water of Increased Content of Molecular Oxygen

  • Jarosław Chwastowski,
  • Wojciech Ciesielski,
  • Karen Khachatryan,
  • Henryk Kołoczek,
  • Damian Kulawik,
  • Zdzisław Oszczęda,
  • Jacek A. Soroka,
  • Piotr Tomasik and
  • Mariusz Witczak

5 September 2020

Deionized and tap water were saturated with molecular oxygen either prior to (WST), or after (WTS), treatment with low-temperature, low-pressure glow plasma of low frequency (LPGP) for 0, 5, 15, 30, 60, 90, and 120 min. Physical and physicochemical p...

  • Article
  • Open Access
5 Citations
6,230 Views
15 Pages

Enhanced Electrocatalytic Oxygen Reduction Reaction of TiO2 Nanotubes by Combining Surface Oxygen Vacancy Engineering and Zr Doping

  • Maged N. Shaddad,
  • Prabhakarn Arunachalam,
  • Mahmoud S. Hezam,
  • Saba A. Aladeemy,
  • Mamduh J. Aljaafreh,
  • Sharif Abu Alrub and
  • Abdullah M. Al-Mayouf

16 February 2024

This work examines the cooperative effect between Zr doping and oxygen vacancy engineering in anodized TiO2 nanotubes (TNTs) for enhanced oxygen reduction reactions (ORRs). Zr dopant and annealing conditions significantly affected the electrocatalyti...

  • Article
  • Open Access
9 Citations
4,437 Views
14 Pages

Fire Safety of Healthcare Units in Conditions of Oxygen Therapy in COVID-19: Empirical Establishing of Effects of Elevated Oxygen Concentrations

  • Wojciech Wróblewski,
  • Norbert Tuśnio,
  • Paweł Wolny,
  • Dorota Siuta,
  • Janusz Trzebicki,
  • Teresa Bączkowska,
  • Olga Dzikowska-Diduch and
  • Piotr Pruszczyk

5 April 2022

Large-scale usage of oxygen therapy (OT) may lead to increased oxygen concentrations (OC) in places where COVID-19 patients are treated. The aim of the study was to establish in an empirical way the OC in COVID-19 at the patient’s bedside and t...

  • Review
  • Open Access
7 Citations
3,695 Views
12 Pages

Protecting the Eye Lens from Oxidative Stress through Oxygen Regulation

  • Witold Karol Subczynski,
  • Marta Pasenkiewicz-Gierula and
  • Justyna Widomska

20 September 2023

Molecular oxygen is a primary oxidant that is involved in the formation of active oxygen species and in the oxidation of lipids and proteins. Thus, controlling oxygen partial pressure (concentration) in the human organism, tissues, and organs can be...

  • Article
  • Open Access
3 Citations
4,433 Views
11 Pages

The prediction of the cell yield in large-scale bioreactor culture is an important factor for various cell therapy bioprocess operations to ensure consistency in cell quality and efficient use of resources. However, the shear sensitivity of cells use...

  • Case Report
  • Open Access
4 Citations
2,200 Views
11 Pages

24 October 2023

Due to the imbalance between the supply and demand of oxygen, the oxygen systems of iron- and steel-making enterprises in China have problems with high oxygen emissions and high pressure in the pipelines, resulting in the energy consumption of oxygen...

  • Opinion
  • Open Access
5 Citations
3,333 Views
4 Pages

Physiology and Pathophysiology of Oxygen Sensitivity

  • Robert S. Fitzgerald and
  • Asuncion Rocher

Oxygen is an essential requirement for metabolism in mammals and many other animals. Therefore, pathways that sense a reduction in available oxygen are critical for organism survival. Higher mammals developed specialized organs to detect and respond...

  • Communication
  • Open Access
1,272 Views
12 Pages

Evidence of Enhanced Molecular Oxygen Activity Induced by the Synergistic Effect of Oxygen Vacancies and Ag Nanoparticles in Ag3PO4

  • Xu Zhang,
  • Futao Yi,
  • Li Zhou,
  • Weifeng Xie,
  • Zhenqi Wang,
  • Huaqiang Chu,
  • Xuefei Zhou and
  • Yalei Zhang

26 May 2025

This study investigates the synergistic enhancement of molecular oxygen activation (MOA) in silver phosphate (Ag3PO4) photocatalysts modified with oxygen vacancies (OVs) and silver nanoparticles (Ag0). The vacuum-calcined Ag3PO4 exhibited a 2.05-fold...

  • Article
  • Open Access
11 Citations
4,495 Views
13 Pages

One Simple Strategy towards Nitrogen and Oxygen Codoped Carbon Nanotube for Efficient Electrocatalytic Oxygen Reduction and Evolution

  • Jing Sun,
  • Shujin Wang,
  • Yinghua Wang,
  • Haibo Li,
  • Huawei Zhou,
  • Baoli Chen,
  • Xianxi Zhang,
  • Hongyan Chen,
  • Konggang Qu and
  • Jinsheng Zhao

6 February 2019

The development of advanced electrocatalysts for oxygen reduction and evolution is of paramount significance to fuel cells, water splitting, and metal-air batteries. Heteroatom-doped carbon materials have exhibited great promise because of their exce...

  • Review
  • Open Access
2 Citations
8,388 Views
11 Pages

26 August 2022

This review deals with the production of oxygen by photo-oxidation of water, which is a topic fitting a journal devoted to oxygen. Most of the present biosphere, including mankind, depends on oxygen. Elucidating the mechanism is of importance for sol...

  • Review
  • Open Access
36 Citations
10,228 Views
23 Pages

Supramolecular Control of Singlet Oxygen Generation

  • Akshay Kashyap,
  • Elamparuthi Ramasamy,
  • Vijayakumar Ramalingam and
  • Mahesh Pattabiraman

Singlet oxygen (1O2) is the excited state electronic isomer and a reactive form of molecular oxygen, which is most efficiently produced through the photosensitized excitation of ambient triplet oxygen. Photochemical singlet oxygen generation (SOG) ha...

  • Review
  • Open Access
9 Citations
4,657 Views
17 Pages

Oxygen for the Newborn: Friend or Foe?

  • Serafina Perrone,
  • Sara Manti,
  • Chiara Petrolini,
  • Valentina Giovanna Dell’Orto,
  • Giovanni Boscarino,
  • Chiara Ceccotti,
  • Mattia Bertini,
  • Giuseppe Buonocore,
  • Susanna Maria Roberta Esposito and
  • Eloisa Gitto

17 March 2023

Oxygen supplementation is widely used in neonatal care, however, it can also cause toxic effects if not used properly. Therefore, it appears crucial to find a balance in oxygen administration to avoid damage as a consequence of its insufficient or ex...

  • Feature Paper
  • Review
  • Open Access
148 Citations
13,093 Views
22 Pages

31 March 2017

Discovering new energy materials is a key step toward satisfying the needs for next-generation energy conversion and storage devices. Among the various types of oxides, Ruddlesden–Popper (RP) oxides (A2BO4) are promising candidates for electrochemica...

  • Article
  • Open Access
19 Citations
8,296 Views
21 Pages

29 May 2015

Co-Mn-Mg-Al oxides were synthesized using auto-combustion and co-precipitation techniques. Constant ratios were maintained with (Co + Mn + Mg)/Al equal to 3.0, (Co + Mn)/Mg equal to 1.0 and Co/Mn equal to 0.5. The chemical and structural composition...

  • Feature Paper
  • Review
  • Open Access
5 Citations
7,703 Views
12 Pages

Solid and Liquid Oxygen under Ultrahigh Magnetic Fields

  • Toshihiro Nomura,
  • Yasuhiro H. Matsuda and
  • Tatsuo C. Kobayashi

25 May 2022

Oxygen is a unique molecule that possesses a spin quantum number S=1. In the condensed phases of oxygen, the delicate balance between the antiferromagnetic interaction and van der Waals force results in the various phases with different crystal struc...

  • Article
  • Open Access
2 Citations
1,740 Views
5 Pages

Identification of the Optimal Position of a Nasal Oxygen Cannula for Apneic Oxygenation: A Technical Simulation

  • Wolfgang A. Wetsch,
  • Daniel C. Schroeder,
  • Susanne J. Herff,
  • Bernd W. Böttiger,
  • Volker Wenzel and
  • Holger Herff

17 November 2022

Background: In a cannot-ventilate-cannot-intubate situation, careful preoxygenation with high FiO2 allowing subsequent apneic oxygenation can be life-saving. The best position for an oxygen supply line within the human airway at which oxygen insuffla...

  • Proceeding Paper
  • Open Access
1,412 Views
6 Pages

Development and Prototyping of Oxygen Analyzer

  • Bidheyak Pokharel,
  • Deepa Beeta Thiyam,
  • Sachin Devkota and
  • Devanand Kumar Sah

25 November 2024

In the context of developing countries, medical instruments are imported from foreign countries. To overcome this challenge, herein the design of an oxygen analyzer using ultrasonic flow sensor technology and a microcontroller while promoting local i...

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