Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and qua...Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and quality.A different mutant strain with lower acetaldehyde production and improved ethanol tolerance was constructed using the ARTP-ALE mutagenesis strategy with 4-methylpyrazole-disulfiram.As a result of the mutation,the alcohol dehydrogenase activity of the mutant strain decreased to about 71.22%of that of the wild-type strain.At the same time,the fermentation properties and genetic stability of the newly screened strain showed slight differences from the wild-type strain,and there were no safety concerns regarding industrial use of the mutant strain.展开更多
Cold plasma at room temperature and pressure is an emerging and novel tool for the inactivation of cell derived from its ionic energy,which is capable of breaking bonds such as carbon-carbon,carbon-hydrogen,carbon-oxy...Cold plasma at room temperature and pressure is an emerging and novel tool for the inactivation of cell derived from its ionic energy,which is capable of breaking bonds such as carbon-carbon,carbon-hydrogen,carbon-oxygen,among others,these being the ones that support the biological structure of microorganisms.This work tries to create its own infrastructure that includes a high voltage source,an infrared trigger which reduces the effect of the ozone created,an ionic reactor in which the plasma acts at atmospheric temperature and pressure,and a magnetic field that allow aligning the plasma to the combined processes that are carried out.展开更多
Pyridine-containing anion-based ionic liquids(PA-ILs) with two kinds of interaction sites to bind CO_2, e.g., [P4444][2-OP], were found to be highly efficient for catalysing the cycloaddition reactions of atmospheric ...Pyridine-containing anion-based ionic liquids(PA-ILs) with two kinds of interaction sites to bind CO_2, e.g., [P4444][2-OP], were found to be highly efficient for catalysing the cycloaddition reactions of atmospheric CO_2 with epoxides at room temperature under metal-and halogen-free conditions, producing a series of cyclic carbonates in high yields. It was demonstrated that the cooperative interaction from two interaction sites in the anions of PA-ILs activated CO_2, while the cation activated the epoxides substrates via coordination to the central P+ unit, thus resulting in the high activity of the IL catalysts.展开更多
基金Supported by Heilongjiang Natural Science Foundation Joint Guide Project(LH2019C022)。
文摘Higher levels of acetaldehyde in beer are one of the major concerns in the current beer industry.Yeast produces acetaldehyde during alcoholic fermentation,and its modification significantly affects beer flavor and quality.A different mutant strain with lower acetaldehyde production and improved ethanol tolerance was constructed using the ARTP-ALE mutagenesis strategy with 4-methylpyrazole-disulfiram.As a result of the mutation,the alcohol dehydrogenase activity of the mutant strain decreased to about 71.22%of that of the wild-type strain.At the same time,the fermentation properties and genetic stability of the newly screened strain showed slight differences from the wild-type strain,and there were no safety concerns regarding industrial use of the mutant strain.
文摘Cold plasma at room temperature and pressure is an emerging and novel tool for the inactivation of cell derived from its ionic energy,which is capable of breaking bonds such as carbon-carbon,carbon-hydrogen,carbon-oxygen,among others,these being the ones that support the biological structure of microorganisms.This work tries to create its own infrastructure that includes a high voltage source,an infrared trigger which reduces the effect of the ozone created,an ionic reactor in which the plasma acts at atmospheric temperature and pressure,and a magnetic field that allow aligning the plasma to the combined processes that are carried out.
基金supported by the National Natural Science Foundation of China(21403252,21533011)the Chinese Academy of Sciences(QYZDY-SSW-SLH013)
文摘Pyridine-containing anion-based ionic liquids(PA-ILs) with two kinds of interaction sites to bind CO_2, e.g., [P4444][2-OP], were found to be highly efficient for catalysing the cycloaddition reactions of atmospheric CO_2 with epoxides at room temperature under metal-and halogen-free conditions, producing a series of cyclic carbonates in high yields. It was demonstrated that the cooperative interaction from two interaction sites in the anions of PA-ILs activated CO_2, while the cation activated the epoxides substrates via coordination to the central P+ unit, thus resulting in the high activity of the IL catalysts.
