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Oxygen
Scopus
ISSN 2673-9801 · MDPI AG · 136 artikel di indeks
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Artikel Jurnal Teks lengkap
Tree Proximity Matters: A Novel Framework for Soil Greenhouse Gas Emissions
We introduce triproximity, a conceptual framework that organizes tree–soil greenhouse gas (GHG) interactions across three spatial dimensions: (i) horizontal distance from tree stems, (ii) vertical soil profile depth, and (iii) structural position relative to tree components including the stem…
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The Antioxidant Activity of α-Tocopherol Metabolites in Comparison with the Parent Compound in Hepatocytes
α-Tocopherol (αT) is the major form of vitamin E. Although it is metabolized in the liver when high levels of αT are present, the function of its metabolites has not yet been fully elucidated. This study aimed to evaluate the antioxidant activities of the αT metabolites, α-carboxyethyl…
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Home Oxygen Therapy Utilization in a Newborn Intensive Care Unit Population at Altitude
Neonates born at higher altitudes may be at increased risk for adverse outcomes due to lower ambient oxygen availability. Despite frequent use of home oxygen therapy following neonatal intensive care unit (NICU) discharge, evidence-based guidelines assessing discharge readiness and oxygen…
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Highly Oxygenated Biomolecules: Carbohydrates, Boron Complexes, and Their Biological Interfaces
Carbohydrates are among the most highly oxygenated biomolecules in nature, possessing dense arrays of hydroxyl, ether, carbonyl, carboxylate, phosphate, and sulfate functionalities that govern hydration, hydrogen bonding, molecular recognition, and supramolecular organization. Their…
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The ROS Gatekeeper Hypothesis: A Conceptual Framework for Gasotransmitter Signaling in Pressure Ulcers
Pressure ulcers are a major clinical problem in patients with severe immobility; however, their pathophysiology extends beyond mechanical pressure and localized ischemia. Repetitive ischemia–reperfusion promotes sustained reactive oxygen species (ROS) production, leading to persistent inflammation…
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The Potential for Severe, Acute Inflammation to Impact Tissue Oxygenation—A Narrative Review
Arguably, the most vital function of the cardiovascular system (CVS) is its ability to facilitate the oxygenation of blood in the lungs, and to deliver that oxygen to the rest of the body. This relies on the ability of oxygen to diffuse in and out of the bloodstream, as well as for the CVS to…
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Resting and Physical Activity Energy Expenditure Across an Altitudinal Gradient: An Adjusted Analysis
Introduction: Survival at high altitudes requires efficient energy management. Although hypobaric hypoxia alters thermodynamic efficiency, the independent impact of altitude versus demographic factors on basal and exertional caloric costs remains uncertain. We evaluated these variables in chronic…
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Stokes Components of Raman-Induced Singlet Oxygen
We studied the Stokes signals generated following the Raman photoexcitation of dissolved oxygen in water. When a water sample is pumped with intense nanosecond radiation, Stokes signals of different origins are generated. These signals form a characteristic nonlinear diffraction pattern, comprising…
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Reactivity of Tertiary Amines with Singlet Oxygen and as Electron Donors in Riboflavin-Mediated Quinone Photoreduction
Singlet oxygen is produced by light-dependent excitation of molecular oxygen using photosensitizers. Using blue light and riboflavin (RF) or riboflavin phosphate (RFP) as photosensitizers, we studied the reaction of singlet oxygen with tertiary amines in aqueous solution because many are used as…
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Ozone Therapy as a Controlled Modulator of Redox Signaling and Adaptive Stress Responses: Molecular Mechanisms, Hormetic Effects, and Biomedical Implications
Medical ozone has emerged as a potential redox-modulating intervention in inflammatory and degenerative conditions, particularly in dermatological contexts characterized by chronic oxidative imbalance and impaired tissue remodeling. Unlike conventional pharmacological agents, ozone exerts its…
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Hydroperoxides: Plant Steroids and Triterpenoids as Promising Candidates for Anti-Dementia Therapy
Hydroperoxides (R–OOH, organic hydroperoxides) constitute a relatively small but structurally diverse class of natural metabolites occurring in higher plants, fungi, and marine organisms. Their formation is closely associated with oxidative processes involving redox-active metal ions, particularly…
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Higher Prevalence of Cognitive Impairment in Residents of High-Altitude Regions
Introduction: A major health issue in individuals living at high-altitude regions is an increase in the number of red blood cells (RBCs). This condition generates a series of physiological alterations including the nervous system, where damage can occur due to increased blood viscosity. This…
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Correction: Zouridi et al. The Effect of Additives on the Hydrothermal Synthesis and Thermochromic Performance of Monoclinic Vanadium Dioxide Powder. Oxygen 2022, 2, 410–423
The authors requested to update Equation (5) in the original publication [...]
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Redox-Based Mechanisms of O2 Sensing in Hypoxic Pulmonary Vasoconstriction: Where Are We Now?
Hypoxic pulmonary vasoconstriction (HPV) is a rapid and reversible constrictor response of the pulmonary vasculature, and especially its small muscular precapillary arteries, which is initiated by episodes of local alveolar hypoxia. Acting as a protective homeostatic vasomotor mechanism, HPV…
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Correction: Ahmed et al. The Role of Zinc Oxide Nanoparticles in Boosting Tomato Leaf Quality and Antimicrobial Potency. Oxygen 2026, 6, 2
The authors have requested to replace the Molecular Operating Environment (MOE) mentioned in the main text with AutoDock (SWISS Dock, (version 1 [...]
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The Role of Zinc Oxide Nanoparticles in Boosting Tomato Leaf Quality and Antimicrobial Potency
Salt stress is a major agricultural issue. A promising modern agriculture method is the foliar treatment of zinc oxide nanoparticles (ZnONPs). This approach has shown promise in boosting challenged tomato yields, fruit quality, and leaf extract antibacterial activity against pathogens. A greenhouse…
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Design and Synthesis of Fused Derivatives of 7-Hydroxycoumarin (Umbelliferone) with the Flavonol Quercetin and the Flavone Luteolin-Analysis of Their Antioxidant and Physicochemical Properties
Oxidative stress seems to be part of many deranged processes in the organism, affecting multiple degenerative conditions at a cellular and tissue level. Coumarins and flavonoids comprise two main categories of naturally derived compounds with multiple effects and applications. Our aim in this paper…
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The Role of Supplemental Oxygen for Rescuers Performing External Cardiac Compressions: A Double-Blinded Randomized Crossover Trial
Background: The aim of this study was to assess the effectiveness of supplemental low-flow oxygen on emergency clinicians in improving their quality and length of performance of external chest compressions (ECCs) on a resuscitation manikin. Methods: This was a double-blinded randomized crossover…
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Targeting Catechol Oxidation via Boron Complexation: From Chemistry to Biology
Catechol (benzene-1,2-diol) is a highly versatile chemical motif that plays a central role in both terrestrial and marine systems, where its reactivity is governed by a combination of enzymatic oxidation and non-enzymatic interactions. This review examines the diverse enzymatic pathways responsible…
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Characterization of Mixed Metal Biogenic Manganese Oxide Materials for Catalysis and Rare Earth Element Sequestration
This study explores the potential of utilizing biogenic manganese oxides (BMOs) produced by Mn-oxidizing Pseudomonas putida MnB1 to facilitate metal cation uptake for rare earth element (REE) sequestration and the synthesis of novel materials. Previous studies have shown that P. putida MnB1…