Diurnal and Thermal Variations in an Oxidative Stress Biomarker of Pseudanabaena foetida: A Model for Environmental Adaptation in Aquatic Ecosystems DOI Creative Commons
Mizanur Rahman, Takashi Asaeda,

Kiyotaka Fukahori

et al.

Stresses, Journal Year: 2025, Volume and Issue: 5(1), P. 20 - 20

Published: March 3, 2025

Pseudanabaena foetida, a filamentous cyanobacterium, is highly sensitive to temperature and light intensity. This study explores its oxidative stress responses under diurnal intensities in variations, utilizing hydrogen peroxide (H2O2) normalized optical density (OD730) levels (H2O2/OD730) as biomarker. The adequate P. foetida cells were distributed three incubators for 22 days at 30 °C, 20 10 °C. Light intensity varied over the course of day, increasing from morning maximum noon, followed by gradual decrease until evening. Measurements H2O2, protein, chlorophyll (Chl a), catalase (CAT) activity carried out every hours, starting 6:00 ending 21:00. Protein concentration Chl increased between 12:00 15:00 temperature. CAT, H2O2/OD730 decreased afterwards each CAT was directly proportional foetida’s H2O2 or cell biomass (H2O2/OD730), which indicates defense mechanism. reduced (30 °C °C) significantly impactful on concentration, protein content. model, based biomass, provides valuable insights into different temperatures, with implications understanding climate change.

Language: Английский

Chemosensors for H2O2 Detection: Principles, Active Materials, and Applications DOI Creative Commons

Meng Zhou,

Hui Sun,

Shuai Chen

et al.

Chemosensors, Journal Year: 2025, Volume and Issue: 13(2), P. 54 - 54

Published: Feb. 6, 2025

Hydrogen peroxide (H2O2), a common oxidant present in the environment, food, and biological systems, has wide-ranging applications. While H2O2 is generally considered non-toxic, prolonged or repeated exposure to high concentrations can be harmful, making its accurate detection crucial environmental monitoring, food safety, healthcare, other fields. This review delves into recent advancements methods, with particular focus on chemosensors. We comprehensively summarize fundamental principles of various chemosensor (e.g., colorimetric, fluorescence, chemiluminescence, electrochemical, chemiresistive approaches), active materials, diverse Additionally, we discuss current challenges future prospects this field, emphasizing need for innovative materials advanced sensing technologies meet growing demand highly sensitive, accurate, reliable, real-time, cost-effective solutions.

Language: Английский

Citations

0
Periphyton Response to Additions of Glucose and Hydrogen Peroxide as Control Measures of Harmful Algal Blooms DOI Open Access

Allison K. Romanski,

Charlyn Partridge, Alan D. Steinman

et al.

Journal of Water Resource and Protection, Journal Year: 2025, Volume and Issue: 17(02), P. 47 - 67

Published: Jan. 1, 2025

Language: Английский

Citations

0
Diurnal and Thermal Variations in an Oxidative Stress Biomarker of Pseudanabaena foetida: A Model for Environmental Adaptation in Aquatic Ecosystems DOI Creative Commons
Mizanur Rahman, Takashi Asaeda,

Kiyotaka Fukahori

et al.

Stresses, Journal Year: 2025, Volume and Issue: 5(1), P. 20 - 20

Published: March 3, 2025

Pseudanabaena foetida, a filamentous cyanobacterium, is highly sensitive to temperature and light intensity. This study explores its oxidative stress responses under diurnal intensities in variations, utilizing hydrogen peroxide (H2O2) normalized optical density (OD730) levels (H2O2/OD730) as biomarker. The adequate P. foetida cells were distributed three incubators for 22 days at 30 °C, 20 10 °C. Light intensity varied over the course of day, increasing from morning maximum noon, followed by gradual decrease until evening. Measurements H2O2, protein, chlorophyll (Chl a), catalase (CAT) activity carried out every hours, starting 6:00 ending 21:00. Protein concentration Chl increased between 12:00 15:00 temperature. CAT, H2O2/OD730 decreased afterwards each CAT was directly proportional foetida’s H2O2 or cell biomass (H2O2/OD730), which indicates defense mechanism. reduced (30 °C °C) significantly impactful on concentration, protein content. model, based biomass, provides valuable insights into different temperatures, with implications understanding climate change.

Language: Английский

Citations

0