The Experts below are selected from a list of 6246 Experts worldwide ranked by ideXlab platform
Zhihui Bai - One of the best experts on this subject based on the ideXlab platform.
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Manipulation of nitrogen leaching from tea field soil using a Trichoderma Viride biofertilizer
Environmental Science and Pollution Research, 2017Co-Authors: Shengjun Xu, Cancan Jiang, Shuanglong Ma, Zhihui Bai, Guoqiang Zhuang, Sining Zhou, Shanghua Wu, Xuliang ZhuangAbstract:With the increasing use of chemical fertilizers, negative environmental impacts have greatly increased as a result from agricultural fields. The fungus Trichoderma Viride used as a biofertilizer can efficiently reduce nitrous oxide (N2O) emissions from subtropical tea fields in southern China. In this paper, it was further found that T. Viride biofertilizer could alleviate nitrogen (N) leaching in tea fields. Gross N leaching was 1.51 kg ha−1 year−1 with no external fertilizer input, but when 225 kg N ha−1 year−1was applied, it increased to 12.38 kg ha−1 year−1 using T. Viride biofertilizer but 53.46 kg ha−1 year−1 using urea. Stepwise linear regression analysis identified the factors responsible for N leaching to be soil nitrate concentration and soil interflow, simulated here using the water balance simulation model (WaSiM-ETH). Finally, mass-scale production of T. Viride biofertilizer from waste reutilization using sweet potato starch wastewater and rice straw was found to be cost-effective and feasible. These procedures could be considered a best management practice to reduce N leaching from tea fields in subtropical areas of central China and to reduce pollution from other agricultural waste products.
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mitigating nitrous oxide emissions from tea field soil using bioaugmentation with a Trichoderma Viride biofertilizer
The Scientific World Journal, 2014Co-Authors: Zhihui Bai, Runlin Xiao, Guoqiang ZhuangAbstract:Land-use conversion from woodlands to tea fields in subtropical areas of central China leads to increased nitrous oxide (N2O) emissions, partly due to increased nitrogen fertilizer use. A field investigation of N2O using a static closed chamber-gas chromatography revealed that the average N2O fluxes in tea fields with 225 kg N ha−1 yr−1 fertilizer application were 9.4 ± 6.2 times higher than those of woodlands. Accordingly, it is urgent to develop practices for mitigating N2O emissions from tea fields. By liquid-state fermentation of sweet potato starch wastewater and solid-state fermentation of paddy straw with application of Trichoderma Viride, we provided the tea plantation with biofertilizer containing 2.4 t C ha−1 and 58.7 kg N ha−1. Compared to use of synthetic N fertilizer, use of biofertilizer at 225 kg N ha−1 yr−1 significantly reduced N2O emissions by 33.3%–71.8% and increased the tea yield by 16.2%–62.2%. Therefore, the process of bioconversion/bioaugmentation tested in this study was found to be a cost-effective and feasible approach to reducing N2O emissions and can be considered the best management practice for tea fields.
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utilization of winery wastes for Trichoderma Viride biocontrol agent production by solid state fermentation
Journal of Environmental Sciences-china, 2008Co-Authors: Zhihui Bai, Bo Jin, L I Yuejie, Jian Chen, L I ZumingAbstract:Abstract Biocontrol agents are safe and environmental friendly alternatives for pesticides in agriculture application. Trichoderma Viride WEBL0703 performed a high level of antagonistic activity toward a broad spectrum of phytopathogens and was determined as a biocontrol agent, which was produced by solid state fermentation using grape marc and wine lees. The maximum yield of T. Viride conidia was up to 6.65 × 10 9 CFU/g initial dry substrate (IDS) after 10 d fermentation. As important enzymes for protecting plants from disease, chitinase, β-glucanase, and pectinase yields were 47.8 U/g IDS, 8.32 U/g IDS and 9.83 U/g IDS, respectively. These results show that it is feasible to convert winery wastes to a value-added and environmental friendly biocontrol agent.
Xuliang Zhuang - One of the best experts on this subject based on the ideXlab platform.
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Manipulation of nitrogen leaching from tea field soil using a Trichoderma Viride biofertilizer
Environmental Science and Pollution Research, 2017Co-Authors: Shengjun Xu, Cancan Jiang, Shuanglong Ma, Zhihui Bai, Guoqiang Zhuang, Sining Zhou, Shanghua Wu, Xuliang ZhuangAbstract:With the increasing use of chemical fertilizers, negative environmental impacts have greatly increased as a result from agricultural fields. The fungus Trichoderma Viride used as a biofertilizer can efficiently reduce nitrous oxide (N2O) emissions from subtropical tea fields in southern China. In this paper, it was further found that T. Viride biofertilizer could alleviate nitrogen (N) leaching in tea fields. Gross N leaching was 1.51 kg ha−1 year−1 with no external fertilizer input, but when 225 kg N ha−1 year−1was applied, it increased to 12.38 kg ha−1 year−1 using T. Viride biofertilizer but 53.46 kg ha−1 year−1 using urea. Stepwise linear regression analysis identified the factors responsible for N leaching to be soil nitrate concentration and soil interflow, simulated here using the water balance simulation model (WaSiM-ETH). Finally, mass-scale production of T. Viride biofertilizer from waste reutilization using sweet potato starch wastewater and rice straw was found to be cost-effective and feasible. These procedures could be considered a best management practice to reduce N leaching from tea fields in subtropical areas of central China and to reduce pollution from other agricultural waste products.
Liu Deming - One of the best experts on this subject based on the ideXlab platform.
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effects of air pressure amplitude on cellulase productivity by Trichoderma Viride sl l in periodic pressure solid state fermenter
Process Biochemistry, 1999Co-Authors: Sun Tao, Li Zuohu, Liu Beihui, Liu DemingAbstract:Air pressure amplitude serves as a critical control parameter of periodic pressure solid state fermentation process. Effects of different air pressure amplitudes on cellulase production by Trichoderma Viride-SL were investigated. Experiments were carried out in the same fermenter as reported earlier. Under the optimum periodic pressure amplitude, 1400 IU/g CMCase activity can be obtained in the system against 450 IU/g compared with the tray fermenter.
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a novel design of solid state fermenter and its evaluation for cellulase production by Trichoderma Viride sl 1
Biotechnology Techniques, 1996Co-Authors: Li Zuohu, Liu DemingAbstract:A novel design of a large scale solid state fermenter, designated as PPSSF--Periodic Pressure Solid State Fermenter-- was constructed. Due to the respiration created by periodical variations of air pressure, air was uptaken / expelled from the fermenting mass and heat moved from the fermenter easily. It is possible to operate the unit at different capacities simply by adding or removing the bins. The results of its evaluation for enzyme formation by Trichoderma Viride SL-1 indicated that a 2-3 fold increased cellulase production can be obtained in this system.
Jeroen S Dickschat - One of the best experts on this subject based on the ideXlab platform.
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2h pyran 2 ones from Trichoderma Viride and Trichoderma asperellum
European Journal of Organic Chemistry, 2013Co-Authors: Susanne Wickel, Christian A Citron, Jeroen S DickschatAbstract:Volatiles emitted by the soil fungi Trichoderma Viride 272 and Trichoderma asperellum 328 were collected by using the closed loop stripping analysis (CLSA) headspace technique, and the obtained extracts were analysed by GC/MS. Several alkyl- and alkenyl-2H-pyran-2-ones, including known compounds 6-pentyl-2H-pyran-2-one and (E)-6-(pent-1-en-1-yl)-2H-pyran-2-one, and the new derivatives (E)-6-(pent-2-en-1-yl)-2H-pyran-2-one, 6-propyl-2H-pyran-2-one, and 6-heptyl-2H-pyran-2-one were found. The alkenyl derivative (E)-6-(hept-1-en-1-yl)-2H-pyran-2-one, previously tentatively identified from a marine Botrytis by MS analysis, was also detected. All alkenyl pyrones were synthesised by using a reported Stille coupling followed by lactonisation, whereas the alkylated pyrones were obtained through a reported synthetic approach by radical bromination of 5-alkylpent-2-en-5-olides and dehydrobromination. Because the yields in both cases were not satisfactory and fell a long way short of the yields reported for similar compounds, all compounds were synthesised again using a gold-catalysed coupling of terminal alkynes with propiolic acid recently developed by Schreiber and co-workers, giving high yields in all cases. A comparison of the synthetic methods is given.
Mohamed A. Ali - One of the best experts on this subject based on the ideXlab platform.
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Isolation and characterization of the bioactive metabolites from the soil derived fungus Trichoderma Viride.
Mycology, 2018Co-Authors: Nagwa E. Awad, Hanaa A. Kassem, Manal A. Hamed, Amal M. El-feky, Mohamed A. A. Elnaggar, Khaled Mahmoud, Mohamed A. AliAbstract:ABSTRACTThe aim of the present study was to evaluate different biological activities of Trichoderma Viride fungus (Family Hypocreaceae). Trichoderma Viride isolated for the first time from the cucumber soil (rhizosphere). It was tested as antimicrobial, antioxidant and anticancer agent. Trichoderma Viride from the cucumber soil (rhizosphere) caused inhibition of the mycelial growth of Fusarium solani, Rhizoctonia solani and Sclerotium rolfsii. Also, the alcoholic extract of the fungal mycelia proved a potent antibacterial activity against Bacillus subtilis, Escherichia coli and Pseudomonas fluorescens. In addition, it exhibited a significant antifungal activity against Candida albicans, Fusarium solani, Fusarium oxysporium, Rhizoctonia solani and Pythium ultimum at 100 µg/disc. Study of the antimicrobial and antioxidant activities of the volatile constituents had been done. The in vitro antioxidant, anticancer and antiviral activities of the isolated proteins, and carbohydrates were determined. Furthermor...
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Isolation and characterization of the bioactive metabolites from the soil derived fungus Trichoderma Viride
Taylor & Francis Group, 2018Co-Authors: Nagwa E. Awad, Hanaa A. Kassem, Manal A. Hamed, Amal M. El-feky, Mohamed A. A. Elnaggar, Khaled Mahmoud, Mohamed A. AliAbstract:The aim of the present study was to evaluate different biological activities of Trichoderma Viride fungus (Family Hypocreaceae). Trichoderma Viride isolated for the first time from the cucumber soil (rhizosphere). It was tested as antimicrobial, antioxidant and anticancer agent. Trichoderma Viride from the cucumber soil (rhizosphere) caused inhibition of the mycelial growth of Fusarium solani, Rhizoctonia solani and Sclerotium rolfsii. Also, the alcoholic extract of the fungal mycelia proved a potent antibacterial activity against Bacillus subtilis, Escherichia coli and Pseudomonas fluorescens. In addition, it exhibited a significant antifungal activity against Candida albicans, Fusarium solani, Fusarium oxysporium, Rhizoctonia solani and Pythium ultimum at 100 µg/disc. Study of the antimicrobial and antioxidant activities of the volatile constituents had been done. The in vitro antioxidant, anticancer and antiviral activities of the isolated proteins, and carbohydrates were determined. Furthermore, the volatile constituents were isolated from fresh mycelia of Trichoderma Viride and subjected to GC/MS analysis. Total protein (10%), carbohydrate (19.57%), steroidal (13.95%) and triterpenoidal content (38.34%) were determined in the alcoholic extract of Trichoderma Viride mycelia. In conclusion, this fungus showed antioxidant, anticancer, antiviral and antibacterial effects. Further studies must be done to identify the molecules responsible for its effect and to consider its application in the pharmacological and medicinal purposes
