Results 31 to 40 of about 94,948 (251)

Chemical Diversity and Biochemical Transformation of Biogenic Organic Sulfur in the Ocean

Frontiers in Marine Science, 2020
Organic sulfur compounds are not only essential for organismal survival but also indispensable for the sulfur cycle. Over the past few decades, dimethylsulfoniopropionate (DMSP) and dimethyl sulfide (DMS) cycling in the upper ocean have been well ...
Kai Tang
doaj   +1 more source

Multifunctional role of the biological sulfur cycle in wastewater treatment: Sulfur oxidation, sulfur reduction, and sulfur disproportionation

Desalination and Water Treatment
The biological sulfur cycle, a crucial biogeochemical process in nature, demonstrate significant engineering potential in pollutant removal and resource recovery.
Xin Jin, Hao Wang, Qingxuan Wu, Jiaxuan Zhang, Simin Li   +4 more
doaj   +1 more source

Photochemical and thermochemical pathways to S2 and polysulfur formation in the atmosphere of Venus

Nature Communications, 2022
Polysulfur compounds have been ascribed as the unknown near-UV absorbers in Venusian atmosphere and play a key role in the sulfur chemical cycle of this planet.
Antonio Francés-Monerris, Javier Carmona-García, Tarek Trabelsi, Alfonso Saiz-Lopez, James R. Lyons, Joseph S. Francisco, Daniel Roca-Sanjuán   +6 more
doaj   +1 more source

The therapeutic opportunities and pitfalls of using iron ion chelators to treat neurodegenerative diseases

FEBS Letters, EarlyView.
Although too much iron in the brain promotes neurodegeneration, iron ion chelators have had mixed effects in clinical trials. This review explains why; some chelators do not render the iron redox‐inactive (e.g., L1) whereas others do (e.g., desferrioxamine).
Barry Halliwell
wiley   +1 more source

Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone

Nature Communications, 2021
To explore the importance of local vs. global sulfur-cycle controls on variations in pyrite sulfur isotopes, the authors couple carbon-nitrogen-sulfur concentrations and stable isotopes of sediments from the Peruvian oxygen minimum zone, identifying a ...
Virgil Pasquier, David A. Fike, Itay Halevy   +2 more
doaj   +1 more source

A yeast model of 5‐oxoproline accumulation reveals a general toleration to 5‐oxoproline

FEBS Open Bio, EarlyView.
Using a yeast model, we show that even high accumulation of 5‐oxoproline causes only mild cellular stress and does not trigger oxidative stress. Instead, cells adapt by activating efflux pumps and diverse protective pathways, suggesting that previously proposed harmful effects of 5‐oxoproline may arise from indirect metabolic imbalances rather than the
Pratiksha Dubey, Vaishnavi Sanjayan, Praveen Singh, Shantanu Sengupta, Anand Kumar Bachhawat   +4 more
wiley   +1 more source

Sustainable Synthesis of Sulfur-Single Walled Carbon Nanohorns Composite for Long Cycle Life Lithium-Sulfur Battery

Nanomaterials, 2022
Lithium–sulfur batteries are considered one of the most appealing technologies for next-generation energy-storage devices. However, the main issues impeding market breakthrough are the insulating property of sulfur and the lithium-polysulfide shuttle ...
Eleonora Venezia, Pejman Salimi, Susana Chauque, Remo Proietti Zaccaria   +3 more
doaj   +1 more source

Lipopolysaccharide uptake is augmented in lipopolysaccharide‐tolerant mouse macrophage‐like cells via increased CD14 expression

FEBS Open Bio, EarlyView.
In normal (nontolerant) cells, CD14 is crucial for both LPS uptake and LPS signaling. In LPS‐tolerant cells, in which LPS‐induced TNF‐α and IFN‐β production is suppressed, there is a dramatic increase in surface CD14 expression. The overexpressed CD14 in LPS‐tolerant cells is responsible for the enhanced LPS uptake without inducing pro‐inflammatory ...
Saeka Nishihara, Takayuki Manabe, Mika Jouta, Kiyoshi Kawasaki   +3 more
wiley   +1 more source

Sulfate-reducing microorganisms in wetlands – fameless actors in carbon cycling and climate change

Frontiers in Microbiology, 2012
Freshwater wetlands are a major source of the greenhouse gas methane but at the same time can function as carbon sink. Their response to global warming and environmental pollution is one of the largest unknowns in the upcoming decades to centuries.
Michael ePester, Klaus-Holger eKnorr, Michael W. Friedrich, Michael eWagner, Alexander eLoy   +4 more
doaj   +1 more source

Microbial Communities Involved in Methane, Sulfur, and Nitrogen Cycling in the Sediments of the Barents Sea

Microorganisms, 2021
A combination of physicochemical and radiotracer analysis, high-throughput sequencing of the 16S rRNA, and particulate methane monooxygenase subunit A (pmoA) genes was used to link a microbial community profile with methane, sulfur, and nitrogen cycling ...
Shahjahon Begmatov, Alexander S. Savvichev, Vitaly V. Kadnikov, Alexey V. Beletsky, Igor I. Rusanov, Alexey A. Klyuvitkin, Ekaterina A. Novichkova, Andrey V. Mardanov, Nikolai V. Pimenov, Nikolai V. Ravin   +9 more
doaj   +1 more source