scholarly journals Carbon availability mediates the effect of nitrogen on CO2 release from soils

Soil Security ◽  
2022 ◽  
pp. 100041
Author(s):  
Yunyun Zheng ◽  
Xiaojuan Wang ◽  
Jian Jin ◽  
Gary J Clark ◽  
Caixian Tang
Keyword(s):  
Carbon Availability ◽  
Co2 Release

The Importance of Carbon Availability for SND: Improved Nitrogen Removal at Low DO Concentration is not Guaranteed

2018 ◽  
Vol 2018 (5) ◽  
pp. 28-33
Author(s):  
Stephanie Klaus ◽  
Lindsey Ferguson ◽  
Cody Campolong ◽  
Chris Wilson ◽  
Bernhard Wett ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Carbon Availability ◽  
Do Concentration ◽  
Low Do

Photo-triggered CO2 release from Mussel-inspired Polymers

2021 ◽  
pp. 129382
Author(s):  
Jubao Gao ◽  
Zhijun Zhao ◽  
Bin Wu ◽  
Yongsheng Zhao
Keyword(s):  
Co2 Release

scholarly journals Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion

2021 ◽  
Vol 14 (4) ◽  
pp. 211-216
Author(s):  
Aaron Bufe ◽  
Niels Hovius ◽  
Robert Emberson ◽  
Jeremy K. C. Rugenstein ◽  
Albert Galy ◽  
...  
Keyword(s):  
Erosion Rate ◽  
Global Climate ◽  
Stream Water ◽  
Sulfide Oxidation ◽  
Silicate Weathering ◽  
Emission Rates ◽  
Mountain Ranges ◽  
Weathering Rates ◽  
Southern Taiwan ◽  
Co2 Release

AbstractGlobal climate is thought to be modulated by the supply of minerals to Earth’s surface. Whereas silicate weathering removes carbon dioxide (CO2) from the atmosphere, weathering of accessory carbonate and sulfide minerals is a geologically relevant source of CO2. Although these weathering pathways commonly operate side by side, we lack quantitative constraints on their co-variation across erosion rate gradients. Here we use stream-water chemistry across an erosion rate gradient of three orders of magnitude in shales and sandstones of southern Taiwan, and find that sulfide and carbonate weathering rates rise with increasing erosion, while silicate weathering rates remain steady. As a result, on timescales shorter than marine sulfide compensation (approximately 106–107 years), weathering in rapidly eroding terrain leads to net CO2 emission rates that are at least twice as fast as CO2 sequestration rates in slow-eroding terrain. We propose that these weathering reactions are linked and that sulfuric acid generated from sulfide oxidation boosts carbonate solubility, whereas silicate weathering kinetics remain unaffected, possibly due to efficient buffering of the pH. We expect that these patterns are broadly applicable to many Cenozoic mountain ranges that expose marine metasediments.

Photoinhibition of respiratory CO2 release in the green alga Scenedesmus

1984 ◽  
Vol 60 (4) ◽  
pp. 557-560 ◽  
Author(s):  
Siegfried Scherer ◽  
Erwin Sturzl ◽  
Peter Boger
Keyword(s):  
Green Alga ◽  
Co2 Release

Stem CO2 release under illumination: corticular photosynthesis, photorespiration or inhibition of mitochondrial respiration?

2006 ◽  
Vol 29 (6) ◽  
pp. 1149-1158 ◽  
Author(s):  
CHRISTIANE WITTMANN ◽  
HARDY PFANZ ◽  
FRANCESCO LORETO ◽  
MAURO CENTRITTO ◽  
FABRIZIO PIETRINI ◽  
...  
Keyword(s):  
Mitochondrial Respiration ◽  
Corticular Photosynthesis ◽  
Co2 Release

Summer rain pulses may stimulate a CO2 release rather than absorption in desert halophyte communities

2013 ◽  
Vol 373 (1-2) ◽  
pp. 799-811 ◽  
Author(s):  
Ran Liu ◽  
Ellen Cieraad ◽  
Yan Li
Keyword(s):  
Rain Pulses ◽  
Summer Rain ◽  
Co2 Release ◽  
Desert Halophyte

scholarly journals Serine synthesis pathway inhibition cooperates with dietary serine and glycine limitation for cancer therapy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mylène Tajan ◽  
Marc Hennequart ◽  
Eric C. Cheung ◽  
Fabio Zani ◽  
Andreas K. Hock ◽  
...  
Keyword(s):  
Therapeutic Efficacy ◽  
De Novo ◽  
Carbon Availability ◽  
Global Protein Synthesis ◽  
Enhanced Expression ◽  
One Carbon Metabolism ◽  
Amino Acid Depletion ◽  
Pathway Inhibition

AbstractMany tumour cells show dependence on exogenous serine and dietary serine and glycine starvation can inhibit the growth of these cancers and extend survival in mice. However, numerous mechanisms promote resistance to this therapeutic approach, including enhanced expression of the de novo serine synthesis pathway (SSP) enzymes or activation of oncogenes that drive enhanced serine synthesis. Here we show that inhibition of PHGDH, the first step in the SSP, cooperates with serine and glycine depletion to inhibit one-carbon metabolism and cancer growth. In vitro, inhibition of PHGDH combined with serine starvation leads to a defect in global protein synthesis, which blocks the activation of an ATF-4 response and more broadly impacts the protective stress response to amino acid depletion. In vivo, the combination of diet and inhibitor shows therapeutic efficacy against tumours that are resistant to diet or drug alone, with evidence of reduced one-carbon availability. However, the defect in ATF4-response seen in vitro following complete depletion of available serine is not seen in mice, where dietary serine and glycine depletion and treatment with the PHGDH inhibitor lower but do not eliminate serine. Our results indicate that inhibition of PHGDH will augment the therapeutic efficacy of a serine depleted diet.

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