It was found that Dynol-604, a non-fluorous and no silicon-containing nonionic surfactant, was soluble in supercritical (SC) CO2. The phase behavior of SC CO2/Dynol-604/water system was studied. The results showed t...It was found that Dynol-604, a non-fluorous and no silicon-containing nonionic surfactant, was soluble in supercritical (SC) CO2. The phase behavior of SC CO2/Dynol-604/water system was studied. The results showed that one-phase water-in-CO2 microemulsions could be formed. The solubilization of methyl orange in the microemulsions proved further the existence of water domain in the microemulsions.展开更多
Gt factor is a low-molecular-weight peptide isolated from the extracellular culture of wood-degrading fungus Gloeophyllum trabeum. It is capable of enhancing degradation of cellulose. Its action mechanism was invest...Gt factor is a low-molecular-weight peptide isolated from the extracellular culture of wood-degrading fungus Gloeophyllum trabeum. It is capable of enhancing degradation of cellulose. Its action mechanism was investigated and it was found that Gt factor could reduce Fe3+ to Fe2+. Electron paramagnetic resonance (EPR) spectroscopy revealed in the presence of O2, Gt factor could drive the formation of H2O2 via a superoxide anion O2.- intermediate and mediate the generation of hydroxyl radical HO˙ in a Fenton-type reaction. All these provided evidence for the formation of HO˙ in some wood-degrading fungi.展开更多
基金The authors are grateful to the National Natural Science Foundation of China and Ministry of Science and Technology for the financial support(29725308,G20000781).
文摘It was found that Dynol-604, a non-fluorous and no silicon-containing nonionic surfactant, was soluble in supercritical (SC) CO2. The phase behavior of SC CO2/Dynol-604/water system was studied. The results showed that one-phase water-in-CO2 microemulsions could be formed. The solubilization of methyl orange in the microemulsions proved further the existence of water domain in the microemulsions.
基金This work was supported by grant 39970004 from the National Natural Science Foundation of China.
文摘Gt factor is a low-molecular-weight peptide isolated from the extracellular culture of wood-degrading fungus Gloeophyllum trabeum. It is capable of enhancing degradation of cellulose. Its action mechanism was investigated and it was found that Gt factor could reduce Fe3+ to Fe2+. Electron paramagnetic resonance (EPR) spectroscopy revealed in the presence of O2, Gt factor could drive the formation of H2O2 via a superoxide anion O2.- intermediate and mediate the generation of hydroxyl radical HO˙ in a Fenton-type reaction. All these provided evidence for the formation of HO˙ in some wood-degrading fungi.
