埃克森美孚与可再生能源集团（Renewable Energy Group,REG）近期宣布,双方利用了REG旗下的专利发酵技术（fermentation）,共同论证将各类非食用生物质所含糖类转化为生物柴油的可行性。在初步研究阶段,两家公司成功验证了采用REG Life ...埃克森美孚与可再生能源集团（Renewable Energy Group,REG）近期宣布,双方利用了REG旗下的专利发酵技术（fermentation）,共同论证将各类非食用生物质所含糖类转化为生物柴油的可行性。在初步研究阶段,两家公司成功验证了采用REG Life Sciences发酵技术及多项研究方法,展开更多
[Objective] The aim of this study was to find out a new Trichoderma vride K strain highly producing cellulase.[Method] Ultraviolet（UV） was used to induce mutagenesis on T.vride K and to select out a new Trichoderma ...[Objective] The aim of this study was to find out a new Trichoderma vride K strain highly producing cellulase.[Method] Ultraviolet（UV） was used to induce mutagenesis on T.vride K and to select out a new Trichoderma vride strain highly producing cellulase from the first round and further selection.[Result] A new T.vride strain K6 with high yield of cellulase was obtained with the enzyme production amount of 1.39 times over that of starting strain K.This strain showed highest cellulase yield under the culture condition of 28 ℃ for 96 h.[Conclusion] The strain K6 selected out from induced mutation is endowed with better capacity of producing cellulase,which provides a new method for the utilization of straw.展开更多
The dynamic changes in the distribution of lignin and hemicelluloses (xylans and xyloglucans) in cell walls during the differentiation of secondary xylem in Eucommia ulmoides Oliv. were studied by means of ultraviolet...The dynamic changes in the distribution of lignin and hemicelluloses (xylans and xyloglucans) in cell walls during the differentiation of secondary xylem in Eucommia ulmoides Oliv. were studied by means of ultraviolet light microscopy and transmission electron microscopy combined with immunogold labelling. In the cambial zone and cell expansion zone, xyloglucans were localized both in the tangential and radial walls, but no xylans or lignin were found in these regions. With the formation of secondary wall S-1 layer, lignin occurred in the cell corners and middle lamella, while xylans appeared in S-1 layer, and xyloglucans were localized in the primary walls and middle lamella. In pace with the formation of secondary wall S-2 and S-3 layer, lignification extended to S-1, S-2 and S-3 layer in sequence, showing a patchy style of lignin deposition. Concurrently, xylans distributed in the whole secondary walls and xyloglucans, on the other hand, still localized in the primary walls and middle lamella. The results indicated that along with the formation and lignification of the secondary wall, great changes had taken place in the cell walls. Different parts of cell walls, such as cell corners, middle lamella, primary walls and various layers of secondary walls, had different kinds of hemicelluloses, which formed various cell wall architecture combined with lignin and other cell wall components.展开更多
文摘埃克森美孚与可再生能源集团（Renewable Energy Group,REG）近期宣布,双方利用了REG旗下的专利发酵技术（fermentation）,共同论证将各类非食用生物质所含糖类转化为生物柴油的可行性。在初步研究阶段,两家公司成功验证了采用REG Life Sciences发酵技术及多项研究方法,
文摘[Objective] The aim of this study was to find out a new Trichoderma vride K strain highly producing cellulase.[Method] Ultraviolet（UV） was used to induce mutagenesis on T.vride K and to select out a new Trichoderma vride strain highly producing cellulase from the first round and further selection.[Result] A new T.vride strain K6 with high yield of cellulase was obtained with the enzyme production amount of 1.39 times over that of starting strain K.This strain showed highest cellulase yield under the culture condition of 28 ℃ for 96 h.[Conclusion] The strain K6 selected out from induced mutation is endowed with better capacity of producing cellulase,which provides a new method for the utilization of straw.
文摘The dynamic changes in the distribution of lignin and hemicelluloses (xylans and xyloglucans) in cell walls during the differentiation of secondary xylem in Eucommia ulmoides Oliv. were studied by means of ultraviolet light microscopy and transmission electron microscopy combined with immunogold labelling. In the cambial zone and cell expansion zone, xyloglucans were localized both in the tangential and radial walls, but no xylans or lignin were found in these regions. With the formation of secondary wall S-1 layer, lignin occurred in the cell corners and middle lamella, while xylans appeared in S-1 layer, and xyloglucans were localized in the primary walls and middle lamella. In pace with the formation of secondary wall S-2 and S-3 layer, lignification extended to S-1, S-2 and S-3 layer in sequence, showing a patchy style of lignin deposition. Concurrently, xylans distributed in the whole secondary walls and xyloglucans, on the other hand, still localized in the primary walls and middle lamella. The results indicated that along with the formation and lignification of the secondary wall, great changes had taken place in the cell walls. Different parts of cell walls, such as cell corners, middle lamella, primary walls and various layers of secondary walls, had different kinds of hemicelluloses, which formed various cell wall architecture combined with lignin and other cell wall components.
