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Exploring the climate change discourse on Chinese social media and the role of social bots
In: Asian journal of communication, Band 34, Heft 1, S. 109-128
ISSN: 1742-0911
Effects of compost containing oxytetracycline on enzyme activities and microbial communities in maize rhizosphere soil
In: Environmental science and pollution research: ESPR, Band 25, Heft 29, S. 29459-29467
ISSN: 1614-7499
Treatment of municipal sludge by Fenton oxidation combined vacuum preloading
In: Environmental science and pollution research: ESPR, Band 25, Heft 16, S. 15990-15997
ISSN: 1614-7499
SSRN
Increasing Diversity and Biotic Homogenization of Lake Plankton During Recovery from Acidification
In: STOTEN-D-22-20256
SSRN
Protecting Chinese Investors Through Oppression Actions: An Examination in Light of the Position in the United Kingdom
In: Australian Journal of Asian Law, 2020, Vol 21 No 1, Article 05: 77-93
SSRN
Mechanisms of oxidative response during biodegradation of malathion by S. oneidensis MR-1
In: Environmental science and pollution research: ESPR, Band 31, Heft 11, S. 16832-16845
ISSN: 1614-7499
AbstractMalathion, an extensively used organophosphorus pesticide, poses a high potential risk of toxicity to humans and the environment. Shewanella (S.) oneidensis MR-1 has been proposed as a strain with excellent bioremediation capabilities, capable of efficiently removing a wide range of hard-to-degrade pollutants. However, the physiological and biochemical response of S. oneidensis MR-1 to malathion is unknown. Therefore, this study aimed to examine how S. oneidensis MR-1 responds physiologically and biochemically to malathion while also investigating the biodegradation properties of the pesticide. The results showed that the 7-day degradation rates of S. oneidensis MR-1 were 84.1, 91.6, and 94.0% at malathion concentrations of 10, 20, and 30 mg/L, respectively. As the concentration of malathion increased, superoxide dismutase and catalase activities were inhibited, leading to a significant rise in malondialdehyde content. This outcome can be attributed to the excessive production of reactive oxygen species (ROS) triggered by malathion stress. In addition, ROS production stimulates the secretion of soluble polysaccharides, which alleviates oxidative stress caused by malathion. Malathion-induced oxidative damage further exacerbated the changes in the cellular properties of S. oneidensis MR-1. During the initial stages of degradation, the cell density and total intracellular protein increased significantly with increasing malathion exposure. This can be attributed to the remarkable resistance of S. oneidensis MR-1 to malathion. Based on scanning electron microscopy observations, continuous exposure to contaminants led to a reduction in biomass and protein content, resulting in reduced cell activity and ultimately leading to cell rupture. In addition, this was accompanied by a decrease in Na+/K+- ATPase and Ca2+/Mg2+-ATPase levels, suggesting that malathion-mediated oxidative stress interfered with energy metabolism in S. oneidensis MR-1. The findings of this study provide new insights into the environmental risks associated with organophosphorus pesticides, specifically malathion, and their potential for bioremediation.
Graphical Abstract
Biodegradable mesoporous Co3O4 based nanocarriers with intrinsic lung carcinoma suppression for NIR II fluorescence bioimaging and photothermal augmented photodynamic therapy
In: Materials and design, Band 233, S. 112267
ISSN: 1873-4197
A novel esterase LanE from Edaphocola flava HME-24 and the enantioselective degradation mechanism of herbicide lactofen
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 205, S. 111141
ISSN: 1090-2414
Sunflower resistance against Sclerotinia sclerotiorum is potentiated by selenium through regulation of redox homeostasis and hormones signaling pathways
In: Environmental science and pollution research: ESPR, Band 29, Heft 25, S. 38097-38109
ISSN: 1614-7499
Factors that affect the occurrence and distribution of antibiotic resistance genes in soils from livestock and poultry farms
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 180, S. 114-122
ISSN: 1090-2414
New Insights into the Associations of Copper and Zinc with Nitrogen Metabolism During Manure Composting with Shrimp Shell Powder
In: BITE-D-21-07236
SSRN
Optimisation of biotransformation conditions of theaflavin-3'-gallate
In: International food research journal: IFRJ, Band 31, Heft 2, S. 387-397
ISSN: 2231-7546
Theaflavin-3'-gallate was synthesised using polyphenol oxidase (PPO) from gallocatechin (EGC) and epicatechin gallonic acid (ECG). Using PPO, Box-Behnken design, and single factor test, the optimal reaction conditions were determined: ECG/EGC ratio of 3:7, magnetic stirring speed of 200 rpm, reaction temperature of 37°C, and enzyme concentration of 20 mg/100 mL. Under these conditions, the yield of TF-3'-G was 18.1%. These parameters represent the optimal conversion conditions for theaflavin-3'-monogallate.
Assessment of Anti-Mullerian Hormone and Anti-Mullerian Hormone Type II Receptor Variants in Women with Repeated Implantation Failures
In: Reproductive sciences: RS : the official journal of the Society for Reproductive Investigation, Band 28, Heft 2, S. 406-415
ISSN: 1933-7205