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1,335 results for “oxidative stress”
Outdoor mesocosm study evaluating how mass, NaCl tolerance, and pesticide tolerance affect oxidative stress biomarkers (CAT, SOD, GR, GPx, TBARS) in larval wood frogs (Rana sylvatica) exposed to baseline and NaCl-contaminated conditions, 2019
Biomarkers of oxidative stress can aid in wildlife monitoring by allowing conservationists to detect sublethal environmental shifts. However, interpretation of stress responses can be complicated by multiple interacting factors (e.g., individual development, evolved physiological tolerance to stressors) which alter biomarker expression. Here, we investigated how individual ontogenetic traits and population-level tolerance traits influence oxidative stress responses under baseline and contaminated environmental conditions. For our model contaminant, we used NaCl (common freshwater contaminant due to factors such as coastal flooding, irrigation, airborne salt circulation, drought, runoff from road deicing salts). For our model wildlife populations, we used larval wood frogs (Rana sylvatica) from six noninteracting populations known to vary in two population-level tolerance traits: NaCl tolerance (calculated as average time to death from lethal NaCl exposure) and pesticide tolerance (determined by proxy of distance to agriculture - a consistent and highly repeatable relationship). At an outdoor research facility, R. sylvatica tadpoles were exposed to either baseline conditions (0 g/L NaCl added) or NaCl-contaminated conditions (1 g/L NaCl added for 21 days, then reduced to 0.5 g/L NaCl). Exposures were conducted in individual units with 40 replicates per population for each treatment. The experiment was terminated per individual to capture the full term of larval development (Developmental stage: Gosner stage 36), lasting between 33-48 days. For each individual, we measured mass, Snout-Vent-Length, and developmental stage before processing for biomarker expression. Individual homogenates were assayed for oxidative stress biomarkers superoxide dismutase (SOD; responsible for Reactive Oxygen Species capture and peroxide production), glutathione peroxidase (GPx; responsible for high-affinity peroxide reduction), catalase (CAT; responsible for low-affinity peroxide reducti
Increased inflammation and oxidative stress caused by accumulated metal particle exposure among metro station staff, Tianjin, China, 2023
Metro is a significant part of world transport, delivering over 58 billion passengers annually. The dilution effect of particulate matter (PM) from natural ventilation was limited in underground metro stations. What's worse, train operation processes generated PM rich in heavy metals. Though PM pollution in metro stations was reported widely, there is limited evidence of the adverse health effect of metro station PM. This dataset collected urinary samples from 74 metro station staff from three different metro stations in Tianjin, China, for inflammation and oxidative stress biomarker tests to better understand the potential health effects induced by metal particulates in metro stations. Also, an indoor air quality survey was conducted simultaneously in the metro stations.
Stress analysis and Q-factor of free-standing (La,Sr)MnO3 oxide resonators (Dataset)
<p>Datafiles of the article "Stress analysis and Q-factor of free-standing (La,Sr)MnO3 oxide resonators"</p>
Metabolomics data associated with "Glial swip-10 controls systemic mitochondrial function, oxidative stress, and neuronal viability via copper ion homeostasis"
<p>Raw feature tables used for metabolomic analysis of the <em>Caenorhabditis elegans</em> mutant <em>swip-10</em>. The data were generated using liquid chromatography coupled high-resolution mass spectrometry. Two different columns were used: HILIC (+ ESI) and C18 (-ESI), coupled to a Thermo Q-Exactive Orbitrap mass spectrometer. The feature tables were generated using open-source peak peaking and alignment R packages: apLCMS and xMAanalyzer. See more details in the associated manuscript.</p>
Fig. 3 in Water pH and hardness alter ATPases and oxidative stress in the gills and kidney of pacu (Piaractus mesopotamicus)
Fig. 3. Thiobarbituric acid reactive substances (TBARS) content (nmol TMP mg wet tissue-1) in a. gills and b. kidney of pacu (Piaractus mesopotamicus) juveniles under different water hardness and pH at different times. LWH = low water hardness (50 mg CaCO L-1); HWH = high water hardness (120 mg CaCO L-1). Data are presented as the means ± SEM (n = 3 3 9 fish treatment–1). Different uppercase letters indicate statistically differences between pH at the same hardness (P <0.05). Different lowercase letters indicate statistically differences between hardness at the same pH (P <0.05).
Fig. 2 in Water pH and hardness alter ATPases and oxidative stress in the gills and kidney of pacu (Piaractus mesopotamicus)
Fig. 2. Total antioxidant capacity against peroxyl radicals (ACAP) (relative area) in a. gills and b. kidney of pacu (Piaractus mesopotamicus) juveniles under different water hardness and pH at different times. LWH = low water hardness (50 mg CaCO L-1); HWH = high water hardness (120 mg CaCO L-1). Data are presented as the means ± SEM (n = 9 fish treatment–1). 3 3 Different uppercase letters indicate statistically differences between pH at the same hardness (P <0.05).
Accelerated Stress Tests for Solid Oxide Cells via Artificial Aging of the Fuel Electrode
<p><strong>AD ASTRA: Data from Experiments for Artificial Aging of the Fuel Electrode in Solid Oxide Cells via Redox Cycling</strong></p> <p>One of the big hurdles towards fast deployment of Solid Oxide Cells (fuel cells or electrolyzers) is durability. Although intensive works are carried out for life time improvement, they meet a serious problem concerning long term electrochemical tests for accumulation of reliable data that may continue several years, which is unaffordable. A problem-solving approach is the introduction of Accelerated Stress Tests (AST) applying high levels of stress for a shorter period thus reducing the test time for degradation qualification.</p> <p>Since there are no definite criteria for the level of acceleration of a specific degradation phenomenon, the selection of aggravating conditions is a critical moment which is under studies in the FCH JU Project AD ASTRA (GA 825027).</p> <p>Herein we present data accumulated during the development of a procedure for artificial accelerated aging of the fuel electrode via redox cycling. They include electrochemical testing (current-voltage curves and impedance measurements) and microstructural characterization (SEM-BSE image analysis), as well as procedure for redox cycling.</p>
Supplementary Materials of Bacillus subtilis Protects the Ducks from Oxidative Stress Induced by Escherichia coli: Efficacy and Molecular Mechanism
<p>Figure S1: The KEGG classification of DEGs; Table S1: Analysis composition of basal diets and nutrient level (air-dry basis, %); Table S2: Primers used for the RT-qPCR in this study.</p>
Figure 3 in Multiple metals and agricultural use affects oxidative stress biomarkers in freshwater Aegla crabs
Figure 3. Biomarkers grouped by hydrographic basin (Suzana River basin, Ligeirinho-Leãozinho River basin, Dourado River basin). Different letters indicate significant differences (p <0.05), as compared by one-way ANOVA plus Tukey post-test (between basins).
Figure 2 in Multiple metals and agricultural use affects oxidative stress biomarkers in freshwater Aegla crabs
Figure 2. Biplot of PCA ordination for the metal concentration in sediment of the three studied basins. Suzana River basin (S); Ligeirinho-Leãozinho River basin (L); Dourado River basin (D).
Figure 1 in Multiple metals and agricultural use affects oxidative stress biomarkers in freshwater Aegla crabs
Figure 1. Map of the sampling sites. (A) Suzana River basin (between 27°35'38" and 27°36'16"S; 52°11'11" and 52°13'41"W); (B) Ligeirinho-Leãozinho River basin (between 27°40'15" and 27°36'16"S; 52°16'03" and 52°13'41"W); (C) Dourado River basin (between 27°33'59" and 27°37'13"S; 52°17'46" and 52°19'36"W). The circles (•) indicate the sampled streams. The numbered boxes indicate the areas of land uses analysis.
Fig.3. Relation between depression level expresed Fig.4 in Oxidative Stress Indicators, Depression And Qua Lity Of Live L Evel S In Co Rona Ry Heart Disease Patients
Fig.3. Relation between depression level expresed Fig.4. Box plot displaying the distribution of the in Geriatric depression score points and oxidative data showing differences in Geriatric depression stress parameter (GPx) score points in primary and recurrent SCHD patients according to gender.
Fig.1. Relation between depression level expresed Fig.2 in Oxidative Stress Indicators, Depression And Qua Lity Of Live L Evel S In Co Rona Ry Heart Disease Patients
Fig.1. Relation between depression level expresed Fig.2. Relation between depression level expresed in Geriatric depression score points andlevelof in Geriatric depression score points and oxidative life Quality. stress parameter (MDA).
Fig. 1 in The Influence Of Thermal Preadaptation On Some Oxidative Processes In The First Leaves Of Wheat Seedlings (Triticum Aestivum L.) Under Heat Stress
Fig. 1. The rate of superoxide (O2˙ˉ) production (µmol/h) in the etiolated first leaves at the early (from 4th to 5th days) and late (from 7th to 8th days) stages of seedlings development.
Fig. 2 in The Influence Of Thermal Preadaptation On Some Oxidative Processes In The First Leaves Of Wheat Seedlings (Triticum Aestivum L.) Under Heat Stress
Fig. 2. Catalase activity in the etiolated first leaves at the early (from 4th to 5th days) and late (from 7th to 8th days) stages of seedling development.
Fig. 4 in The Influence Of Thermal Preadaptation On Some Oxidative Processes In The First Leaves Of Wheat Seedlings (Triticum Aestivum L.) Under Heat Stress
Fig. 4. Catalase activity in the etiolated first leaves at the (A) early (from 4th to 5th days) and (B) late (from 7th to 8th days) stages of seedling development (C ‒ control 26oC; E ‒ 26oC → 32oC; E1 ‒ 32o→42oC; E2 ‒ 26oC → 42oC).
Fig. 3 in The Influence Of Thermal Preadaptation On Some Oxidative Processes In The First Leaves Of Wheat Seedlings (Triticum Aestivum L.) Under Heat Stress
Fig. 3. The rate of superoxide (O2˙ˉ) production (µmol/h) in the etiolated first leaves at the (A) early (from 4th to 5th days) and (B) late (from 7th to 8th days) stages of seedlings development (C ‒ control 26oC; E ‒ 26oC → 32oC; E1 ‒ 32o→42oC; E2 ‒ 26oC → 42oC).
Fig. 1 in Oxidative stress parameters in juvenile Brazilian flounder Paralichthys orbignyanus (Valenciennes, 1839) (Pleuronectiformes: Paralichthyidae) exposed to cold and heat shocks
Fig. 1. (TBARS), (GST) and (CAT) activity in the liver of Paralichthys orbignyanus juveniles exposed to different temperatures (17.1, 23.0 and 28.8ºC) as a function of time exposition (72 h). Values are expressed as means ± SEM, N=5. aLower case letters indicate significantly different at the different temperatures and same time (P <0.05), determined by two-way ANOVA and by Dunnet test. ACapital letters indicate significantly different at the same temperatures and different times (P <0.05), determined by two-way ANOVA and by Dunnet test.
The proteasome-interacting Ecm29 protein disassembles the 26S proteasome in response to oxidative stress
<p>This repository contains the modeling files and the analysis related to the article <a href="https://www.ncbi.nlm.nih.gov/pubmed/28821611">"The proteasome-interacting Ecm29 protein disassembles the 26S proteasome in response to oxidative stress"</a> by Wang et al. in J Biol Chem 2017.</p> <p><strong>For more information</strong> about how to reproduce this modeling, see the <a href="https://salilab.org/ecm29/">Sali lab website</a> or the README file.</p>
Figure 1 in Cardiotoxic effects of enrofloxacin on electrophysiological activity, cardiac markers, oxidative stress, and haematological findings in rabbits
Figure 1. Histological examination of rabbit heart in the negative control (A) shows normal morphology. Histological examination of rabbit heart in group 1 (B) and group 2 (C) shows normal morphology except for some minor abnormalities including hyperaemia in some areas (H&E, 400×).
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