Pleurotus sp2 and Trametes gallica were selected in this assay because of their high activities of lignocellulolytic enzymes and the enzyme peaks appeared at the early stage of liquid state fermentation.Solid state fe...Pleurotus sp2 and Trametes gallica were selected in this assay because of their high activities of lignocellulolytic enzymes and the enzyme peaks appeared at the early stage of liquid state fermentation.Solid state fermentation was also investigated for their abilities and behaviors of enzyme\|production.The capabilities and characteristics of the two strains in degrading biomass were studied.When \Pleurotus sp2\ was incubated in wheat straw powder containing the liquid medium of low\|nitrogen,no\|carbon and high inorganic salt,the activities of MnP and Lac reached the peaks on the tenth day,but the activities of hemicellulases reached the peak on the 40th day.\Pleurotus sp2\ caused 17.6 of biomass loss.When \T.gallica was incubated in wheat straw powder containing the liquid medium of hlig\|nitrogen,or low\|nitrogen,no\|carbon and high inorganic salt,the activities of MnP reached the peaks on the tenth day,the lac and hemicelluloses on the 40th day,and the lignin peroxidases reached the peaks on the 50th day,and it caused more than 64% of biomass loss.Among them the hemicellulose was degraded by 71.96%,and the cellulose 66.21%. T.gallica% was very capable of degrading lignin of wheat straw and caused 34.37 loss during 20 days,46.71 loss during 30 days and 70.14% loss during 60 days.It was interesting that \T.gallica \degraded lignin preferentially with respect to cellulose,which was very beneficial to biopulping of paper industry.展开更多
We amplified the 197 bp HMG box sequence by using Polymerase Chain Reaction (PCR) with primers according to the known SRY sequence from male raccoon genomic DNA, and then cloned and sequenced. The nucleic acid and ami...We amplified the 197 bp HMG box sequence by using Polymerase Chain Reaction (PCR) with primers according to the known SRY sequence from male raccoon genomic DNA, and then cloned and sequenced. The nucleic acid and amino acid sequence comparison between raccoon and other mammals revealed high conservation of the SRY HMG box in mammals (about 80%), which implied that the DNA binding activity was crucial to mediate the action of SRY in sex determination. The variation of raccoon HMG box sequence mainly occurred on purine by replacement and missense mutation, which implicated that only the HMG box protein with advanced structure had efficient activity. The homology and difference between mammals HMG box was accorded to the evolution systematic tree.展开更多
文摘Pleurotus sp2 and Trametes gallica were selected in this assay because of their high activities of lignocellulolytic enzymes and the enzyme peaks appeared at the early stage of liquid state fermentation.Solid state fermentation was also investigated for their abilities and behaviors of enzyme\|production.The capabilities and characteristics of the two strains in degrading biomass were studied.When \Pleurotus sp2\ was incubated in wheat straw powder containing the liquid medium of low\|nitrogen,no\|carbon and high inorganic salt,the activities of MnP and Lac reached the peaks on the tenth day,but the activities of hemicellulases reached the peak on the 40th day.\Pleurotus sp2\ caused 17.6 of biomass loss.When \T.gallica was incubated in wheat straw powder containing the liquid medium of hlig\|nitrogen,or low\|nitrogen,no\|carbon and high inorganic salt,the activities of MnP reached the peaks on the tenth day,the lac and hemicelluloses on the 40th day,and the lignin peroxidases reached the peaks on the 50th day,and it caused more than 64% of biomass loss.Among them the hemicellulose was degraded by 71.96%,and the cellulose 66.21%. T.gallica% was very capable of degrading lignin of wheat straw and caused 34.37 loss during 20 days,46.71 loss during 30 days and 70.14% loss during 60 days.It was interesting that \T.gallica \degraded lignin preferentially with respect to cellulose,which was very beneficial to biopulping of paper industry.
基金This work was supported by Ministry of Sciences and Technology China (No. 2002CB111301) and Program for Changjiang Scholars and Innovative Research Team in University (No. IRT0453)and also Sichuan Science & Technology Department and Sichuan Education Department.
文摘We amplified the 197 bp HMG box sequence by using Polymerase Chain Reaction (PCR) with primers according to the known SRY sequence from male raccoon genomic DNA, and then cloned and sequenced. The nucleic acid and amino acid sequence comparison between raccoon and other mammals revealed high conservation of the SRY HMG box in mammals (about 80%), which implied that the DNA binding activity was crucial to mediate the action of SRY in sex determination. The variation of raccoon HMG box sequence mainly occurred on purine by replacement and missense mutation, which implicated that only the HMG box protein with advanced structure had efficient activity. The homology and difference between mammals HMG box was accorded to the evolution systematic tree.
