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RISS 인기검색어
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- 저자 : Liu Shenghao (검색결과 3 건)
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Enrichment and isolation of phenol from its aqueous solution using foam fractionation
Shenghao Guo,Zhao Liang Wu,Wei Liu,Hongzhen Li,Di Huang,Nan Hu 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
In this work, the feasibility of foam fractionation for the enrichment and isolation of phenol from itsaqueous solution was studied by using cetyltrimethyl ammonium bromide (CTAB) as the collector. Atwo-stage foam fractionation technology was developed for simultaneously obtaining a high enrichmentratio and a high recovery percentage. Under the suitable operating conditions, the enrichment ratio andrecovery percentage of phenol reached as high as 84.46 and 93.43%, respectively. Subsequently, foamfractionation was also used to isolate phenol from CTAB in the first stage foamate, in which theinteraction between phenol and CTAB could be weakened by adjusting pH. The concentration of CTABsignificantly decreased from 11.230 g/L in the feeding solution to 0.620 g/L in the residual solution byusing the foam fractionation, while the concentration of phenol slightly decreased from 2.533 g/L to2.450 g/L. The results indicated that it was practicable to successively enrich and isolate phenol from itsaqueous solution by using foam fractionation.
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Huaping Xu,Shengji Liu,Bifeng Yin,Hekun Jia,Shenghao Yu 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.6
Although exhaust gas recirculation (EGR) is a common way to suppress the nitrogen oxide (NO X ) emissions, it also brings some negative impact on soot emissions and the thermal efficiency in internal combustion engines. We investigated the effects of ambient oxygen concentrations on engine performance, combustion characteristics, and emissions using a four-cylinder diesel engine equipped with an endoscopic visualization system. To estimate the flame temperature and soot distribution, we analyzed these images using a postprocessing program. Experimental results showed that the luminosity of flames in the images was degraded comparatively for the reduced oxygen concentration. Flame temperature distribution also showed similar behavior. As the oxygen concentration decreased, area of soot distribution significantly reduced at IMEP = 0.13 MPa, and only a slight decrease at IMEP = 0.3 MPa. But locally high soot concentration regions increased.
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Li Chaochao,Xu Xinhui,Liu Shenghao,Zhang Pengying 한국식물생명공학회 2024 Plant biotechnology reports Vol.18 No.1
Chalcone synthase (CHS), a key enzyme in plant flavonoid synthesis, is essential for plant tolerance to abiotic stress. However, little research on CHS from the earliest terrestrial plants, such as mosses, has been reported. Here, the biological function of a CHS gene from Antarctic moss Pohlia nutans (PnCHS1) was studied. PnCHS1 had a 32.8–53.7% similarity to CHS from other species, however it still had highly conserved motifs of CHS such as Catalytic site (Asn366, His333) and Co-A binding site (Ser146). Subcellular localization analysis showed that PnCHS1 was distributed in the cell membrane and in the membranes of endothelial organelles. Heterologous expression of PnCHS1 increased flavonoid content in 5-day-old Arabidopsis grown with 24 h light and 17-day-old Arabidopsis cultured with sucrose, as well as anthocyanin content in the latter. PnCHS1 heterologous expression in Arabidopsis increased plant tolerance to salt stress, including a high germina- tion rate and a long taproot. Heterologous expression of PnCHS1 boosted tolerance to oxidative stress while decreasing the sensitivity to ABA. Under H2O2 or ABA stress, the expression pattern of PnCHS1, ROS scavenging enzyme gene (FeSOD1, FeSOD2, Cu-Zn-SOD2, and Cu-Zn-SOD3) and three genes of ABA signal pathway (RAB18, RD29B, and NCED3) were considerably up-regulated by real-time quantitative analysis. It indicates that PnCHS1 could enhance plant tolerance to NaCl and oxidative stresses, and may play a role in the adaptation of Antarctic moss to extreme environments.
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