http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kinetics of polyvinyl butyral hydrolysis in ethanol/water solutions
Wenwen Luan,Chunyu Wang,Zuoxiang Zeng,Weilan Xue,Xuelian He,Yu Bai 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.9
The hydrolysis kinetics of polyvinyl butyral (PVB) was studied in ethanol/water mixed solvents in the temperature range of 339.15-355.15 K, and a three-step hypothesis was proposed to describe the hydrolysis process. The influences of stirring speed, ethanol content and temperature on the hydrolysis of PVB were investigated, and an induction period (IP) phenomenon was found in the process of PVB hydrolysis. The ethanol content in the mixed solvents has a great influence on IP, which is due to the formation of the two kinds of water-ethanol clusters in the system. Temperature influences the IP by changing the catalytic activity of hydroxylamine hydrochloride (HH) on the hydrolysis of PVB. The shrinking core models with three controlling steps were used to fit the kinetic data, and the results indicate that the model controlled by chemical reaction is suitable to describe the kinetic behavior of PVB hydrolysis.
Caihong Qin,Wenwen Bai,Pin Liu,Jiayu Huang,Hui Guo,Xuemin Huang,Xiaoqing Dang,Dongjie Yan 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
The removal of toluene using a cycling adsorption and plasma mineralization process was investigated ina packed reactor. The supports of catalysts were optimized in regards to mineralization rate (MR), CO2selectivity (SCO2), and the production of by-products. The hybrid support g-Al2O3-HY showed a muchbetter MR in comparison to that of HY alone. Using hybrid HY-g-Al2O3 as supports, loading Ag–Mn ononly HY or g-Al2O3 had a better MR than loading Ag–Mn on both HY and g-Al2O3. The stability studyshowed that intermediates accumulated on the surface of the catalyst lead to its deterioration.
Caihong Qin,Hui Guo,Pin Liu,Wenwen Bai,Jiayu Huang,Xuemin Huang,Xiaoqing Dang,Dongjie Yan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.63 No.-
Toluene abatement through adsorption and then plasma oxidation using ZSM-5, ZSM-5-γ-Al2O3 (Z-Al), ZSM-5-TiO2 (Z-Ti), ZSM-5-BaTiO3 (Z-Ba), and AgMn/ZSM-5-BaTiO3 (AgMn/Z-Ba) as adsorbents/catalysts was investigated. The efficiency of toluene removal reached ∼100% for all the tested adsorbents/catalysts. ZSM-5 had the lowest mineralization rate (MR) of ∼43%, while Z-Ba had the highest MR (88%) with an SCO2 of ∼80%. After loading AgMn onto Z-Ba, both the breakthrough capacity of toluene and SCO2 was increased, while the production of byproduct O3 and MR was decreased. The mixed materials created a higher amount of active species capable of deeply oxidizing adsorbed toluene.
Yi, Wei-Min,Wang, Feige,Wu, Xue-Bing,Yang, Jinyi,Bai, Jin-Ming,Fan, Xiaohui,Brandt, William N.,Ho, Luis C.,Zuo, Wenwen,Kim, Minjin,Wang, Ran,Yang, Qian,Zhang, Ju-jia,Wang, Fang,Wang, Jian-Guo,Ai, Yanl IOP Publishing 2014 ASTROPHYSICAL JOURNAL LETTERS - Vol.795 No.2
<P>Very few of the z > 5 quasars discovered to date have been radio-loud, with radio-to-optical flux ratios (radio-loudness parameters) higher than 10. Here we report the discovery of an optically luminous radio-loud quasar, SDSS J013127.34-032100.1 (J0131-0321 in short), at z = 5.18 +/- 0.01 using the Lijiang 2.4 m and Magellan telescopes. J0131-0321 has a spectral energy distribution consistent with that of radio-loud quasars. With an i-band magnitude of 18.47 and a radio flux density of 33 mJy, its radio-loudness parameter is similar to 100. The optical and near-infrared spectra taken by Magellan enable us to estimate its bolometric luminosity to be L-bol similar to 1.1 x 10(48) erg s(-1), approximately 4.5 times greater than that of the most distant quasar known to date. The black hole mass of J0131-0321 is estimated to be 2.7 x 10(9) M-circle dot, with an uncertainty up to 0.4 dex. Detailed physical properties of this high-redshift, radio-loud, potentially super-Eddington quasar can be probed in the future with more dedicated and intensive follow-up observations using multi-wavelength facilities.</P>
Identification of a Novel Human Zinc Finger Gene, ZNF438, with Transcription Inhibition Activity
Zhong, Zhaomin,Wan, Bo,Qiu, Yun,Ni, Jun,Tang, Wenwen,Chen, Xinya,Yang, Yun,Shen, Suqin,Wang, Ying,Bai, Meirong,Lang, Qingyu,Yu, Long Korean Society for Biochemistry and Molecular Biol 2007 Journal of biochemistry and molecular biology Vol.40 No.4
There were many different families of zinc finger proteins that contained multiple cysteine and/or histidine residues and used zinc to stabilize their folds. The classical C2H2 zinc finger proteins were the founding members of this superfamily and were among the most abundant proteins in eukaryotic genomes. C2H2 proteins typically contained several C2H2 fingers that made tandem contacts along the DNA. Here we reported a novel C2H2 type zinc finger gene, ZNF438, which encoded 828 amino acids that formed five zinc finger domains. Bioinformatics analysis revealed that the ZNF438 was mapped to human chromosome 10p11.2 and shared 62% identity with rat and mouse homologues. RT-PCR analysis indicated that it was ubiquitously expressed in 18 human adult tissues. With immunofluorescence assay, it was shown that the exogenous Flag-tagged ZNF438 was located in nucleus of COS-7 cells. To further explore the function of ZNF438, we examined the transcriptional activity of ZNF438 protein by transfecting recombinant pM-ZNF438 into mammalian cells. The subsequent analysis based on the duel luciferase assay system showed that ZNF438 was a transcriptional repressor.
Caihong Qin,Rongrong Liu,Chaochao Jiang,Mengke Guo,Rui Yu,Jiayu Huang,Wenwen Bai,Xiaoqing Dang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Non-thermal plasma coupling Fe2+ containing liquid-phase catalysis (NTP-LC/ Fe2+) can effectively reusethe byproduct ozone (O3) of NTP in LC/ Fe2+ for volatile organic compounds (VOCs) degradation. However,the low recycling rate of Fe2+/Fe3+ resulted in poor catalytic effect of the coupling system. In this study,the chelator protocatechuic acid (PCA) was added to LC/Fe2+ to enhance the removal of representativeVOC acetone. The results showed that adding PCA increased the acetone removal efficiency to 91% andkept O3 100% removed within 180 min. The mechanism of PCA-enhanced acetone degradation was thatPCA accelerated the Fe3+/Fe2+ cycle by generating PCA-Fe3+ chelates, which prevented the Fe3+ from precipitationand promoted the production of OH and O2 - for acetone oxidation.