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- 저자 : Xinyue Pei (검색결과 3 건)
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Pei Wang,Xinyue Li,Lu Tian,Zhenxin Gu,Runqiang Yang 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.1
Broccoli sprouts produce several bioactive compounds and are recognized as a health-promoting vegetable. In this study,the eff ect of salinity (NaCl) on the growth of broccoli sprouts was investigated. Broccoli seeds were germinated for 4 and 8d with spraying 0–120 mM NaCl and then harvested to evaluate changes in endogenous hormones, photosynthetic indices,chlorophyll fl uorescence parameters and chloroplast ultrastructure. The growth of sprouts was signifi cantly promoted by lowsalinity (40 and 80 mM NaCl) and inhibited by high salinity treatment (120, 160 and 200 mM NaCl). In 8-day-old sproutstreated with 80 mM NaCl, levels of abscisic acid, cytokinin, brassinolide, indole-3-acetic acid and gibberellic acid weresignifi cantly enhanced, while net photosynthetic rate increased in low salinity conditions was due to the elevated chlorophyllcontent and increased photosystem II activity. Furthermore, low salinity increased the leaf area maximally in both 4- and8-day-old sprouts. Enlarged chloroplast and an increased number of grana also contributed to improved photosynthesis. Low salinity conditions induced endogenous growth hormone synthesis and improved photosynthesis, thereby promotingthe growth of broccoli sprouts. This study provides a theoretical basis for the improved production of broccoli sprouts inlow salinity conditions.
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Reactivation of spent FCC catalyst by mixed acid leaching for efficient catalytic cracking
Guojian Lu,Xinyu Lu,Pei Liu 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.92 No.-
This work focuses on the reactivation offluid catalytic cracking (FCC) catalyst via mixed acid to leach outpollutant Ni and Fe oxides and reserve acidic sites provider Al2O3 in zeolite. The micro-structure,morphology and chemical composition of reactivated catalysts were characterized by X-ray diffraction(XRD), scanning electron microscope (SEM), and energy dispersive X-ray analysis (EDXA), respectively. The change of micro-structure and catalytic performance of the catalyst after reactivation werediscussed. The blocked micro- and meso-pores in the spent catalyst are opened by acid leaching, and thespecific surface area is doubled, which is close to that of fresh catalyst. The catalytic performance of thereactivated catalyst is evaluated in heavy oil micro-reactor. It results in 6.3% increase of conversion thanthe spent catalyst, and 2.31% increase of gasoline yield and 11.60% increase of diesel yield. This method forspent FCC catalyst reactivation has strong practicability and is of great significance for environmentprotection and resources recycling.
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Fei Liu,Bing-Bing Li,De Sun,Fenggang Li,Xinyue Pei 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.5
Membrane hydrophilicity is a crucial factor in evaluating ultrafiltration processes. In this paper, chitosan(CS) was selected for the hydrophilic modification of the polylactic acid (PLA) membrane, and PLACS membranes wereprepared for the densification of the yeast solution. By non-solvent phase inversion method (NIPS), the PLACS microfiltrationmembranes were prepared by using chitosan (CS) acetic acid solution as the coagulation bath and glutaraldehydeas the crosslinking agent. PLACS membranes were characterized by water contact angle, porosity, pore sizedistribution, mechanical properties, ATR-FTIR, SEM, TGA and the ultrafiltration experiment. The viscosity of coagulationbath solution can severely influence the exchange rate of the solvent and the non-solvent as well during phaseinversion; therefore, it can regulate the precipitation kinetics and membrane morphology. The results showed that chitosan(CS) was presented as granular on the pore surfaces of the PLACS membranes. When chitosan (CS) contentincreased, gel rate became smaller and membrane forming process was prolonged; the porosity and pore size of thePLACS were increased compared to the polylactic acid (PLA) membrane, pure water flux increased from 90.31 L·m2·h1to 120.14 L·m2·h1, and yeast rejection rate increased from 75% to more than 90%.
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