Reduced graphene oxide/polypyrrole composite: an advanced electrode for high-performance symmetric/asymmetric supercapacitor

Liu Guijing,Shi Yanying,Wang Lei,Song Yadong,Gao Shanmin,Liu Dong,Fan Leqing 한국탄소학회 2020 Carbon Letters Vol.30 No.4

Polypyrrole (PPy) decorated on reduced graphene oxide (rGO) flms is successfully prepared with pyrrole (Py) monomers and rGO through one-step combining oxidation with polymerization reaction. Compared with the pure individual compo�nents, rGO/PPy compound turns out better electrochemical characteristics owing to the introduction of rGO sheets, which improves the specifc surface area and the conductivity of composite material. When the amount of rGO is 10% of the total, the rGO/PPy compound delivers the best capacitance of 389.3 F g−1 at 1.0 A g−1 in a three-electrode system and 266.8 F g−1 at 0.25 A g−1 in the symmetric supercapacitor system. In addition, asymmetric device (rGO/PPy//AC) has been success�fully fabricated using optimized rGO/PPy compound as positive electrode, activated carbon as negative electrode (AC) and 1 M Na2SO4 aqueous solution as electrolyte. The device obtains long cycle stability under the high-voltage region from 0 to 1.6 V, meanwhile displaying the satisfed energy density of 19.7 Wh kg−1 at 478.1 W kg−1. Besides, the rGO/PPy//AC device presents satisfactory rate capability and long life time.

英语被动句的汉译探析

刘亚妮(Yani Liu) YIXIN 출판사 2024 Journal of Humanities and Social Sciences Vol.2 No.2

在英语翻译专业的学术研究和实践领域,对英语被动句及其汉语翻译策略进行深入分析和探讨具有重要意义。本文通过综合运用直接转换、主动句转换、增译、减译以及分译等多种汉译策略,揭示和解析在翻译英语被动句到汉语过程中,必须考虑到的包括词性、语法结构以及特有语言习惯在内的关键因素,强调了这些因素在保证翻译准确性和流畅性方面的重要性。本文希望能够帮助英语翻译专业的学者和学习者不仅更深入地理解英语被动句的语法和语义特点,掌握和应用有效的翻译技巧,提高将英语被动句准确翻译为汉语的能力。 In the academic research and practice of English translation, in-depth analysis and discussion on English passive sentences and their Chinese translation strategies are of great significance. This article employs a variety of Chinese translation strategies including direct conversion, active sentence conversion, addition, omission, and segmentation to unveil and analyze the essential factors that must be considered in the process of translating English passive sentences into Chinese. These factors encompass word class, grammatical structure, and specific language habits, underscoring their importance in ensuring the accuracy and fluency of translations. This paper aims to assist scholars and learners in the field of English translation not only to gain a deeper understanding of the grammatical and semantic characteristics of English passive sentences but also to master and apply effective translation techniques to enhance their ability to accurately translate English passive sentences into Chinese.

Adsorption differences and mechanism of chitooligosaccharides with specific degree of polymerization on macroporous resins with different functional groups

Yanying Hou,Lujie Liu,Xingxing Zhang,Yuechao Zhu,Yongjun Qiu,Liming Zhao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-

Ion exchange resins are promising materials for separating chitooligosaccharides (COSs) with differentdegrees of polymerization (DP). The adsorbent functional groups significantly determine the interactionswith COSs and affect their adsorption and separation efficiency. This study investigated the adsorptionbehaviors of COSs on macroporous cation exchange resins with different functional groups to clarifythe functional group effect on the adsorption of COSs with different DP, which can also help to providea theoretical basis for the selection of separation medium and optimization of the separation technicsof COSs. The results showed that the adsorption of COSs on sulfonic-acid type resin DX-10 andcarboxylic-acid type resin DC-10 were favorable, and the adsorption isotherms were in accord withthe Sips model. Adsorption thermodynamics showed that temperature had opposite effects on the tworesins’ equilibrium adsorption capacity of COSs. The diffusion coefficient of COSs on DX-10 resin wasgreater, and the affinity gap between COSs on DX-10 resin was larger than that of DC-10 resin, whichis beneficial for improving the separation resolution of COSs. In contrast, the interaction energy betweenCOSs with high DP and DC-10 resin was weaker compared with DX-10, which made the elution of COSswith high DP easier.

WEAK NORMAL PROPERTIES OF PARTIAL ISOMETRIES

Liu, Ting,Men, Yanying,Zhu, Sen Korean Mathematical Society 2019 대한수학회지 Vol.56 No.6

This paper describes when a partial isometry satisfies several weak normal properties. Topics treated include quasi-normality, subnormality, hyponormality, p-hyponormality (p > 0), w-hyponormality, paranormality, normaloidity, spectraloidity, the von Neumann property and Weyl's theorem.

The new focus of energy storage: flexible wearable supercapacitors

Yani Yan,Yi Zhou,Yongfeng Li,Yanzhen Liu 한국탄소학회 2023 Carbon Letters Vol.33 No.6

As the demand for flexible wearable electronic devices increases, the development of light, thin and flexible high-performance energy-storage devices to power them is a research priority. This review highlights the latest research advances in flexible wearable supercapacitors, covering functional classifications such as stretchability, permeability, self-healing and shapememory capabilities, as well as practical studies on energy harvesting capabilities.

Weak normal properties of partial isometries

Ting Liu,Yanying Men,Sen Zhu 대한수학회 2019 대한수학회지 Vol.56 No.6

This paper describes when a partial isometry satisfies several weak normal properties. Topics treated include quasi-normality, subnormality, hyponormality, $p$-hyponormality ($p>0)$, $w$-hyponormality, paranormality, normaloidity, spectraloidity, the von Neumann property and Weyl's theorem.

Analysis of the effect of Rhodopseudomonas palustris on the lead exposure rat model using 1H-NMR-based metabolomics of urine and plasma

Chai Shutong,Zheng Ziyun,Liu Yani,Liang Yanhui,Yang Hong,Chen Jie,Bai Hongjuan,Yang Guan-e 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2

Background Rhodopseudomonas palustris had the eff ect of adsorbing and removing lead ions. Metabolomics is a comprehensive analysis based on several metabolites or biomarkers. Objective The paper aimed to investigate the restorative eff ect and the potential mechanisms of R. palustris in rats with the lead exposure model using 1 H-NMR metabolomics. Results Nine endogenous metabolites from rat plasma and 13 endogenous metabolites from rat urine were identifi ed as potential biomarkers of the symptoms of lead poisoning. The changes of metabolites levels in the plasma included lower levels of valine, acetoacetate, and N-acetyl-glycoprotein and a higher concentration of lactate, acetate, creatine, threonine, glutamine, and asparagine in model group compared with control group. Furthermore, increased citrate, succinate, dimethylamine, pyruvate, acetoacetate, α -oxoglutarate and asparagine, accompanied by decreased LDL/VLDL, taurine, creatinine, glucose and hippurate levels were observed in the model group compared with the control group in the urine. Biochemical parameters and histopathology examination dovetailed well with the metabolomics data. Treatment with R. palustris at a certain degree returned the levels of these metabolites to normal levels. Plasma and urine metabolomic analysis showed changes associated with energy metabolism, amino acids and fatty acid metabolism of lead exposure rats. Conclusion The eff ects of removing lead ions of R. palustris in rats with lead exposure were confi rmed. This research demonstrated that 1 H-NMR-based metabolomics was a promising tool to identify potential biomarkers and unravel protective eff ect mechanisms of R. palustris in lead poisoning rats.

Thioredoxin A of Streptococcus suis Serotype 2 Contributes to Virulence by Inhibiting the Expression of Pentraxin 3 to Promote Survival Within Macrophages

Zhao Chijun,Jia Xinglin,Pan Yanying,Liao Simeng,Zhang Shuo,Ji Chunxiao,Kuang Guangwei,Wu Xin,Liu Quan,Tang Yulong,Fang Lihua 한국미생물학회 2023 The journal of microbiology Vol.61 No.4

Streptococcus suis serotype 2 (SS2) is an important zoonotic pathogen that can infect humans in contact with infected pigs or their byproducts. It can employ different types of genes to defend against oxidative stress and ensure its survival. The thioredoxin (Trx) system is a key antioxidant system that contributes adversity adaptation and pathogenicity. SS2 has been shown to encode putative thioredoxin genes, but the biological roles, coding sequence, and underlying mechanisms remains uncharacterized. Here, we demonstrated that SSU05_0237-ORF, from a clinical SS2 strain, ZJ081101, encodes a protein of 104 amino acids with a canonical CGPC active motif and an identity 70–85% similar to the thioredoxin A (TrxA) in other microorganisms. Recombinant TrxA efficiently catalyzed the thiol-disulfide oxidoreduction of insulin. The deletion of TrxA led to a significantly slow growth and markedly compromised tolerance of the pathogen to temperature stress, as well as impaired adhesion ability to pig intestinal epithelial cells (IPEC-J2). However, it was not involved in H2O2 and paraquat-induced oxidative stress. Compared with the wild-type strain, the ΔTrxA strain was more susceptible to killing by macrophages through increasing NO production. Treatment with TrxA mutant strain also significantly attenuated cytotoxic effects on RAW 264.7 cells by inhibiting inflammatory response and apoptosis. Knockdown of pentraxin 3 in RAW 264.7 cells was more vulnerable to phagocytic activity, and TrxA promoted SS2 survival in phagocytic cells depending on pentraxin 3 activity compared with the wild-type strain. Moreover, a co-inoculation experiment in mice revealed that TrxA mutant strain is far more easily cleared from the body than the wild type strain in the period from 8–24 h, and exhibits significantly attenuated oxidative stress and liver injury. In summary, we reveal the important role of TrxA in the pathogenesis of SS2.

Synergic adsorption of acid blue 80 and heavy metal ions (Cu2+/Ni2+) onto activated carbon and its mechanisms

Xinsheng Luo,Ziqiang Lei,Pengxin Zhou,Yani Liu,Guofu Maa,Zhe Zhang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-

A novel synergic adsorption process of acid blue 80 dye (AB80) and heavy metal ions (Cu2+ or Ni2+) on alow-cost activated carbon (PRAC) which was prepared from potato residue was reported. The resultsindicated that the maximum adsorption capacity of PRAC for AB80 and Cu2+ were 294.7 mg/g and45.0 mg/g in the AB80-Cu2+ system, respectively. In the mono-component system, the values were173.0 mg/g and 26.8 mg/g, respectively. Compared with mono-component system, the AB80 and Cu2+showed good synergistic effect on PRAC. The similarly result was revealed in the AB80-Ni2+ system. For abinary system, the adsorption isotherm of AB80 and heavy metal ions followed the non-modified Sipsmodel, and the adsorption kinetic models followed the pseudo-second order kinetic model. The effect ofpH also was discussed, and showed significant role in the binary-component system adsorption. Theselectivity in synergic adsorption was discussed. BET, FE-SEM/EDX and XPS were used to characterizePRAC with and without adsorbed dye and heavy metal ions, possible mechanisms of AB80 and heavymetal ions synergic adsorption process were proposed.

法門寺 地宮 茶具 考察

이주현(Juhyeon Lee),진응염(Yingyan Chen),왕예(rui Wang),진엄영(Yanying Chen),류심죽(Xinzhu Liu),유병희(Byeonghee Yoo) 한국차문화학회 2020 한국차문화 Vol.11 No.-

This study compares the tea set unearthed at the Famen Temple with The fourth chapter of Tea Classics, and analyses the use of tea set based on the location of the unearthed artefacts and the record of the Account Tablet of the recordation of gold, silver and jewelry dedicated to Bodhisattva. The characteristics of the tea set in Famen Temple are as follows. Firstly, The material is silver, and the ornamentation is gilding.The tea set from Famen Temple is for the royal family only, which is given the supreme status. However, these features are different from the idea of Lu Yu, who advocated the elegance and simplicity of tea-drinking culture. Secondly, the tea set is generally heavy, with inscription describing weight, location of production, artisan, supervisor, and commissioner. Thirdly, The saucer was used as a tea set along with the glass teacup. The pale yellow, no pattern glass teacups and saucers are not as thransparent as those made around the same time in Western Asia, but at least they indicate that glass tea sets were already being made during the Tang Dynasty. Fourthly, The unearthed artefacts are divided into three categories, based on the records in the Account Tablet and the location where they were unearthed. The first category(6 pieces) are tea sets, the second(2 pieces) are inferred to be tea sets in comparison with The fourth chapter of Tea Classics, and the third(5 pieces) are incense utensils. Finally, tea pots from the Lu Yu period have yet to be unearthed. Based on the inclination of the unearthed teacups, it can be deduced that the tea-drinking method at the palace was not identical to the Lu Yu period, but more in-depth follow-up research is needed. The Famen Temple tea set used in the royal family is the oldest and highest ranking tea set found so far, which is fully representative.If the Tea Classic is the crystallization of the theory of contemporary tea culture, the tea set in the underground palace can be regarded as an empirical argument for the theory of contemporary tea culture.