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Xueli Dong,Jing Ji,Songhao Zhang,Danliu Peng,Yurong Wang,Lishuang Zhang,Jiali Li,Gang Wang 한국생물공학회 2022 Biotechnology and Bioprocess Engineering Vol.27 No.4
The biodegradation of straw by cellulosedegrading strains plays an important role in the disposal of agricultural waste. In this study, a Penicillium sp. strain JiTF01 that could degrade cellulose was isolated at the low temperature (10oC), and its fermentation conditions were optimized by response surface method. Strain JiTF01 was applied to degrade rice straw at 10oC. It was found that the straw degradation ratio could reach to 46.53% on the 25th day of culture with the enzyme activity of 44.30 U/mL under optimized fermentation conditions. In addition, given that strain JiTF01 showed excellent acid resistance and the cellulase produced by strain JiTF01 exhibited higher enzymatic activity and stability under acidic conditions, the uninterrupted integration process of acid pretreatment and acid fermentation of straw was then performed. The results showed that the degradation ratio of 53.61% was observed after 25 days of the fermentation at pH 3, which increased by 7.08% than that under optimized conditions. Besides, the effect of straw fermentation broth on the growth of rice seed was also investigated, and the 10-5 and 10-6 diluted fermentation broth was found that could significantly promote the growth of rice seedlings and enhance the germination rate of rice seeds under the salt stress of 100 and 200 mmol/L. The conclusions found in this article might have important implications for straw recycling in cold regions.
Porous membranes in pressure-assisted forward osmosis: Flux behavior and potential applications
Yang Yang,Xueli Gao,Zhaokui Li,Qun Wang,Senjie Dong,Xiaojuan Wang,Zhun Ma,Leyi Wang,Xinyan Wang,Congjie Gao 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-
In this work, pressured-assisted forward osmosis (PAFO) was performed using porous membranes to achieve higher fluxes. The effects of additional pressure and membrane orientation on membrane performance were investigated. When ultralow additional pressure (0.04 bar) was applied, the water flux at AL-FS orientation (i.e. active layer facing the feed solution) was observed to double. Reverse solute diffusion was also inhibited dramatically at both membrane orientations in PAFO. Filtration tests revealed that porous membranes with ultralow pressure in FO were more applicable than ultrafiltration (UF) because mild condition (i.e., 0.12 bar versus 1.25 bar) is conducive to preserving microalgae cell integrity.
Zhen Chen,Han-lai Zeng,Haixia Li,Xueli Ma,Hongxia Dong,Dong Ma 한국유전학회 2014 Genes & Genomics Vol.36 No.6
The two-line system has been widely used inhybrid rice seed production, and the reverse photoperiodsensitivegenic male sterile line is a new germplasm withan opposite phenotype compared with normal photoperiodsensitivegenic male sterile rice. To better understand themolecular mechanisms of fertility regulation in reversephotoperiod-sensitive genic male sterile rice, a comparativeproteomic approach was used to analyze the proteinprofiles of three different tissues (young panicles, flagleaves and leaf sheaths) of D52S during the sensitive periodof pollen fertility transformation under sterile and fertileconditions. By quantitative analysis, 66 protein spotswere identified to be significantly changed in the threetissues. Bioinformatics analyses revealed that in sterilerice, a number of proteins involved in lignin-flavonoidbiosynthesis pathway were down-accumulated in panicles. The majority of proteins associated with energy metabolismwere down-accumulated in leaf sheaths while theproteins up-accumulated in leaves and leaf sheaths wereexclusively photosynthesis and defense related. Based onthe proteomics data, a short-day induced male sterilityprotein network was proposed. In addition, the genes ofselected protein spots were further analyzed by qPCR. These findings provide data for better understanding theregulation of pollen fertility in reverse photoperiodsensitivegenic male sterile rice, which could assist in thedevelopment of practical reverse photoperiod-sensitivegenic male sterile rice for large-scale crop breedingprograms.
( Xue Li ),( Yan-hua Liu ),( Xin Zhang ),( Chang-ming Ge ),( Ren-zhe Piao ),( Wei-dong Wang ),( Zong-jun Cui ),( Hong-yan Zhao ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.3
The development and utilization of crop straw biogas resources can effectively alleviate the shortage of energy, environmental pollution, and other issues. This study performed a continuous batch test at 35°C to assess the methane production potential and volatile organic acid contents using the modified Gompertz equation. Illumina MiSeq platform sequencing, which is a sequencing method based on sequencing-by-synthesis, was used to compare the archaeal community diversity, and denaturing gradient gel electrophoresis (DGGE) was used to analyze the bacterial community diversity in rice straw, dry maize straw, silage maize straw, and tobacco straw. The results showed that cumulative gas production values for silage maize straw, rice straw, dry maize straw, and tobacco straw were 4,870, 4,032.5, 3,907.5, and 3,628.3 ml/g ·VS , respectively, after 24 days. Maximum daily gas production values of silage maize straw and rice straw were 1,025 and 904.17 ml/g ·VS, respectively, followed by tobacco straw and dry maize straw. The methane content of all four kinds of straws was > 60%, particularly that of silage maize straw, which peaked at 67.3%. Biogas production from the four kinds of straw was in the order silage maize straw > rice straw > dry maize straw > tobacco straw, and the values were 1,166.7, 1,048.4, 890, and 637.4 ml/g ·VS, respectively. The microbial community analysis showed that metabolism was mainly carried out by acetateutilizing methanogens, and that Methanosarcina was the dominant archaeal genus in the four kinds of straw, and the DGGE bands belonged to the phyla Firmicutes, Bacteroidetes, and Chloroflexi. Silage maize is useful for biogas production because it contains four kinds of straw.