Water-Soluble Carbon and the Carbon Dioxide Pulse are Regulated by the Extent of Soil Drying and Rewetting

2014 ◽  
Vol 78 (4) ◽  
pp. 1267-1278 ◽  
Author(s):  
Xiaobin Guo ◽  
Craig F. Drury ◽  
Xueming Yang ◽  
W. Daniel Reynolds
Keyword(s):  
Carbon Dioxide ◽  
Water Soluble ◽  
Soil Drying ◽  
Drying And Rewetting ◽  
Soluble Carbon

scholarly journals Photodriven Charge Accumulation and Carrier Dynamics in a Water‐Soluble Carbon Nitride Photocatalyst

ChemSusChem ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1728-1736
Author(s):  
Chunyu Li ◽  
Elisabeth Hofmeister ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Christiane Adler ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Carrier Dynamics ◽  
Water Soluble ◽  
Charge Accumulation ◽  
Soluble Carbon

scholarly journals Assessment of Voltage Influence in Carbon Dioxide Fixation Process by a Photo-Bioelectrochemical System under Photoheterotrophy

2021 ◽  
Vol 9 (3) ◽  
pp. 474
Author(s):  
Sara Díaz-Rullo Edreira ◽  
Silvia Barba ◽  
Ioanna A. Vasiliadou ◽  
Raúl Molina ◽  
Juan Antonio Melero ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Source ◽  
Future Development ◽  
Metabolic Pathways ◽  
Co2 Fixation ◽  
Oxygen Demand ◽  
Carbon Uptake ◽  
Bioelectrochemical System ◽  
Electron Sink ◽  
Soluble Carbon

Bioelectrochemical systems are a promising technology capable of reducing CO2 emissions, a renewable carbon source, using electroactive microorganisms for this purpose. Purple Phototrophic Bacteria (PPB) use their versatile metabolism to uptake external electrons from an electrode to fix CO2. In this work, the effect of the voltage (from −0.2 to −0.8 V vs. Ag/AgCl) on the metabolic CO2 fixation of a mixed culture of PPB under photoheterotrophic conditions during the oxidation of a biodegradable carbon source is demonstrated. The minimum voltage to fix CO2 was between −0.2 and −0.4 V. The Calvin–Benson–Bassham (CBB) cycle is the main electron sink at these voltages. However, lower voltages caused the decrease in the current intensity, reaching a minimum at −0.8 V (−4.75 mA). There was also a significant relationship between the soluble carbon uptake in terms of chemical oxygen demand and the electron consumption for the experiments performed at −0.6 and −0.8 V. These results indicate that the CBB cycle is not the only electron sink and some photoheterotrophic metabolic pathways are also being affected under electrochemical conditions. This behavior has not been tested before in photoheterotrophic conditions and paves the way for the future development of photobioelectrochemical systems under heterotrophic conditions.

scholarly journals Supercritical carbon dioxide design strategies: from drug carriers to soft killers

2015 ◽  
Vol 373 (2057) ◽  
pp. 20150009 ◽  
Author(s):  
Ana Aguiar-Ricardo ◽  
Vasco D. B. Bonifácio ◽  
Teresa Casimiro ◽  
Vanessa G. Correia
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Three Dimensional ◽  
Polymeric Materials ◽  
Drug Carriers ◽  
Water Soluble ◽  
Materials Processing ◽  
Design Strategies ◽  
Simple Economic ◽  
Supercritical Carbon

The integrated use of supercritical carbon dioxide (scCO 2 ) and micro- and nanotechnologies has enabled new sustainable strategies for the manufacturing of new medications. ‘Green’ scCO 2 -based methodologies are well suited to improve either the synthesis or materials processing leading to the assembly of three-dimensional multifunctional constructs. By using scCO 2 either as C1 feedstock or as solvent, simple, economic, efficient and clean routes can be designed to synthesize materials with unique properties such as polyurea dendrimers and oxazoline-based polymers/oligomers. These new biocompatible, biodegradable and water-soluble polymeric materials can be engineered into multifunctional constructs with antimicrobial activity, targeting moieties, labelling units and/or efficiently loaded with therapeutics. This mini-review highlights the particular features exhibited by these materials resulting directly from the followed supercritical routes.

Encapsulation of propolis flavonoids in a water soluble polymer using pressurized carbon dioxide anti-solvent crystallization

2014 ◽  
Vol 94 ◽  
pp. 138-146 ◽  
Author(s):  
Shang-Jung Yang ◽  
Jia-Jiuan Wu ◽  
Yuan-Chuen Wang ◽  
Chih-Feng Huang ◽  
Tzong-Ming Wu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Soluble ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Solvent Crystallization

Depolymerization of Straw Lignin by Manganese Peroxidase from Nematoloma frowardii is Accompanied by Release of Carbon Dioxide

Holzforschung ◽  
1999 ◽  
Vol 53 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Martin Hofrichter ◽  
Katrin Scheibner ◽  
Friedemann Bublitz ◽  
Ivonne Schneegaß ◽  
Dirk Ziegenhagen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Manganese Peroxidase ◽  
Gel Permeation Chromatography ◽  
Water Soluble ◽  
White Rot ◽  
White Rot Fungus ◽  
Lignin Fraction ◽  
Molecular Masses ◽  
Total Lignin ◽  
Soluble Part

SummaryManganese peroxidase preparations (MnP) from the white-rot fungusNematoloma frowardiiwere able to release14CO2directly from14C-labeled milled wheat straw (MWS; total lignin fraction) and milled straw lignin (MSL; dioxane soluble part of MWS). Apart from the formation of14CO2(4–10 %) the treatment of insoluble MWS and MSL with MnP resulted in the formation of water-soluble14C-lignin fragments (lignin solubilization, 14–25%). Analyses with gel permeation chromatography (GPC) demonstrated the formation of lignin fragments with predominant molecular masses around 1 kDa. The extent of MWS mineralization and solubilization was enhanced in the presence of reduced glutathione (GSH) acting as thiol mediator, whereas MSL mineralization was not stimulated by GSH. The principle of direct extracellular mineralization of lignin catalyzed by the MnP system may make a significant contribution to the formation of carbon dioxide in lignincellulose containing habitats.

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