A liquid phase deposited porous flower-like HNaV6O16⋅4H2O film developed for a novel adsorbent to remove Pb2+, Cu2+, Mn2+ and Cd2+

Xu Hai-Yan,Yang Yi Cai,Li Dong-Cai,Wu Ran Ran,Wang Ai-Guo,Sun Dao-Sheng,Zhang Feng-Jun,오원춘 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.3

Heavy metal ion pollution of water resources is becoming increasingly serious, and adsorption is one of the most effective strategies for removing heavy metal ions. In the paper, hydrated hydrogen sodium vanadium oxide (HNaV 6O164H2O) fi lm developed for heavy metal ion adsorption was prepared directly via a low-temperature liquid-phase deposition approach. The prepared film shows an interesting porous flower-like morphology and has large spacing ( d = 10.87 Å). The highest adsorption capacity of the obtained HNaV 6O164H2O fi lm for Pb 2+, Cu 2+, Cd 2+ and Mn 2+ is 513 mg/g (2565 mg/m 2), 430 mg/g (2150 mg/m 2), 134 mg/g (875 mg/m 2) and 175 mg/g (670 mg/m 2), respectively. The adsorption percentage of the sample decreased from 92.2 to 86.3% after 4 cycles. The adsorption process follows the Langmuir adsorption isotherm and the pseudo second-order dynamic model, indicating that heavy metal ion adsorption by the fi lm is a single molecular layer chemical adsorption. In combination with various characterizations and comparison tests of samples after adsorption, the adsorption mechanisms include surface electrostatic attraction, complexation, and cation exchange. The results indicate that the fi lm is a potential material to remove heavy metal ions from the aqueous solution.

Research on the Formulation and Properties of a High-Performance Geopolymer Grouting Material Based on Slag and Fly Ash

Jun Xu,Ai Hong Kang,Zheng Guang Wu,Peng Xiao,Bo Li,Yi Miao Lu 대한토목학회 2021 KSCE Journal of Civil Engineering Vol.25 No.9

In this paper, a high-performance geopolymer grouting material based on slag and fly ash was developed and the properties were investigated. The fluidity, setting time, compressive strength, water resistance and drying shrinkage were studied to evaluate the workability and mechanical properties of geopolymer grouting material (GGM). X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to analyze the microstructural performance of GGM. The results show that the concentration of alkaline activator and slag content plays a significant role in properties of GGM and the optimum formula has been obtained. In the course of the study, the effect of concentration of alkaline activator and the content of slag on the workability and mechanical performance of GGM is different. All properties of geopolymer were considered comprehensively, the slag content and concentration of alkaline activator were 70% and 37%, which indicated that the geopolymer grouting material made from slag and fly ash could meet the requirements of concrete reinforcement well and was friendly to the environment.

Preparation of lithium-doped NaV6O15 thin film cathodes with high cycling performance in SIBs

Xu Hai-Yan,Ruan Jun Hai,Liu Fang Lin,Li Dong-Cai,Zhang Feng-Jun,Wang Ai-Guo,Sun Dao-Sheng,오원춘 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.3

Lithium ions-doped NaV6O15 thin films have been prepared using a simple low temperature liquid phase deposition method and subsequent annealing process. X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), scanning elec- tron microscopy (SEM), and photoelectron spectroscopy (XPS) have been used to study the structural and physicochemical characteristics of the NaV6O15 film. The films were grown on the FTO conductive glass and used directly as an electrode of sodium ion batteries. The prepared lithium ions-doped NaV6O15 thin film electrodes showed an excellent cycling stability and discharge capacity, which may be attributed to the stability of the Li+ embedded into the gap between the V–O layers to maintain the structure and its stable β-phase structure transformed after the first cycle. The cycling stability greatly improved with increasing annealing temperature, while the discharge capacity decreased. The capacities of the film electrodes annealed at 400 °C and 450 °C maintained above 97% after 100 cycles. The lithium-doped NaV6O15 underwent a phase transition dur- ing the first charge/discharge cycle. The new transformed phase has perfect crystal structure stability undergoing insertion and deinsertion of Na+. Therefore, the lithium-doped NaV6O15 thin film possesses good cycling stability and is expected to be a promising thin film cathode for sodium-ion batteries.

Preparation of porous cordierite ceramic with acid-leached coal gangue

Wang Xu-Dong,Xu Hai-Yan,Zhang Feng-Jun,Li Dong-Cai,Wang Ai-Guo,Sun Dao-Sheng,오원춘 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.4

The eff ect of impurities in coal gangue on the sintering and properties (porosity and compressive strength) of porous cordierite ceramics has been investigated by adjusting the amount of impurities by controlling the acid–gangue ratio during acid leaching. The sintering behavior and microstructure of the porous ceramics have been characterized via X-ray diff ractometry and scanning electron microscopy. The eff ects of both the acid–gangue ratio and sintering temperature on the porosity and compressive strength have been also investigated. The results indicated that both porosity and compressive strength of the porous cordierite ceramics prepared using acid-leached coal gangue were evidently improved. The content of the impurities in coal gangue was adjusted via acid leaching by controlling the acid–gangue ratio. The appropriate content of impurities in coal gangue facilitated the sintering process and improved the porosity and compressive strength of the obtained porous cordierite ceramics.

Neutropenia during the First Cycle of Induction Chemotherapy Is Prognostic for Poor Survival in Locoregionally Advanced Nasopharyngeal Carcinoma: A Real-World Study in an Endemic Area

Cheng Xu,Shi-Ping Yang,Yuan Zhang,Ling-Long Tang,Guan-Qun Zhou,Xu Liu,Yan-Ping Mao,Rui Guo,Wen-Fei Li,Lei Chen,Ai-Hua Lin,Ying Sun,Jun Ma 대한암학회 2018 Cancer Research and Treatment Vol.50 No.3

Purpose The purpose of this study was to investigate the effect of neutropenia during the first cycle of induction chemotherapy (IC-1) on survival in locoregionally advanced nasopharyngeal carcinoma (LANPC). Materials and Methods Eligible patients (n=545) with LANPC receiving IC+concurrent chemoradiotherapy were included. Based on nadir neutrophil after IC-1, all patients were categorized into three groups: no/grade 1-2/grade 3-4 neutropenia. Five-year overall survival (OS) and disease-free survival (DFS) were compared between groups and subgroups stratified by IC regimen. We also explored the occurrence of IC-1–induced myelosuppression events and the minimal value of post-treatment neutrophil-to-lymphocyte ratio (post-NLRmin). Univariate/multivariate analyses were performed to investigate the effect of IC-1–induced neutropenia, timing of neutropenia, number of myelosuppression events, and high post-NLRmin on OS/DFS. Results Grade 1-2/grade 3-4 neutropenia were associated with poorer OS/DFS than no neutropenia (all p < 0.05); OS/DFS were not significantly different between patients experiencing grade 1-2 vs. 3-4 neutropenia. Neutropenia had no significant effect on OS/DFS in patients receiving docetaxel–cisplatin–5-fluorouracil (TPF). Grade 1-2 (grade 3-4) neutropenia negatively influenced OS/DFS in patients receiving cisplatin–5-fluorouracil (PF) (PF and docetaxel– cisplatin [TP]; all p < 0.05). Neutropenia, two/three myelosuppression events, and high post-NLRmin ( 1.33) was most frequent on days 5-10, second and third week of IC-1, respectively. After adjustment for covariates, IC-1–induced neutropenia, two/three myelosuppression events, and post-NLRmin  1.33 were validated as negative predictors of OS/DFS (all p < 0.05); timing of neutropenia had no significant effect. Conclusion Occurrence of neutropenia, number of myelosuppression events, and high post-NLRmin during PF/TP IC-1 have prognostic value for poor survival in LANPC.

Cryptotanshinone Induces Inhibition of Breast Tumor Growth by Cytotoxic CD4+ T Cells through the JAK2/STAT4/ Perforin Pathway

Zhou, Jun,Xu, Xiao-Zhen,Hu, Yao-Ren,Hu, Ai-Rong,Zhu, Cheng-Liang,Gao, Guo-Sheng Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6

Cryptotanshinone (CPT), is a quinoid diterpene isolated from the root of the Asian medicinal plant, Salvia miotiorrhiza bunge. Numerous researchers have found that it could work as a potent antitumor agent to inhibit tumor growth in vitro, buith there has been much less emphasis on its in vivo role against breast tumors. Using a mouse tumor model of MCF7 cells, we showed that CPT strongly inhibited MCF7 cell growth in vivo with polarization of immune reactions toward Th1-type responses, stimulation of naive CD4+ T cell proliferation, and also increased IFN-${\gamma}$ and perforin production of CD4+ T cells in response to tumor-activated splenocytes. Furthermore, data revealed that the cytotoxic activity of CD4+ T cells induced by CPT was markedly abrogated by concanamycin A(CMA), a perforin inhibitor, but not IFN-${\gamma}$ Ab. On the other hand, after depletion of CD4+ T cells or blocked perforin with CMA in a tumor-bearing model, CPT could not effectively suppress tumor growth, but this phenomenon could be reversed by injecting naive CD4+ T cells. Thus, our results suggested that CPT mainly inhibited breast tumor growth through inducing cytotoxic CD4+ T cells to secrete perforin. We further found that CPT enhanced perforin production of CD4+ T cells by up-regulating JAK2 and STAT4 phosphorylation. These findings suggest a novel potential therapeutic role for CPT in tumor therapy, and demonstrate that CPT performs its antitumor functions through cytotoxic CD4+ T cells.

중국 실경공연〈인상유삼저(印象劉三姐)〉에 나타난 공연예술과 지역사회의 문화산업적 요소 연구

슈아이잉(Xu, Ai Ying),이준표(Lee, Jun Pyo),이승희(Lee, Seung hee) 한국문화산업학회 2014 문화산업연구 Vol.14 No.4

본 연구는 실경공연의 개념과〈인상유삼저〉의 개발배경 및 세부사항을 살펴보고 지역사회와의 문화산업적 요소를 모색하고자 한다. 또한 한국에서 적용되고 있는 실경공연의 사례를 분석하고 그 문제점을 제시하여 현재 진행 중인 실경공연과 지역사회의 문화산업연구에 이론적인 자료를 제공하고자 한다. 연구방법은 실경공연에 관한 학위논문, 학술지논문 등 문헌조사를 통한 이론적인 고찰 및 신문기사, 인터뷰, 영상자료 등의 자료분석으로 이루어 졌다. 연구범위는 실경공연의 개념과〈인상유삼저〉의 개발배경 및〈인상유삼저〉에 나타난 지역사회와의 문화산업적 요소를 분석하고, 한국의 적용사례와 문제점을 제시한 결과가 포함된다. 분석결과 실경공연의 특징은 다음과 같다. 첫째, 자연환경에 공연요소를 접목한 특징이 있다. 둘째, 지역문화에 뿌리를 둔 소수민족의 민간 전설을 현대적 공연예술로 재창조 했다. 셋째, 지역주민들의 참여로 만들어진 작품이라는 것이다. 결과적으로, 이러한 3가지 특징들에 의해 나타난 문화산업적 영향은 지역사회의 경제적 효과이다. 이를 기반으로 국내에서 기획된 실경공연 중〈인상시리즈〉를 벤치마킹한 안동의〈부용지애〉에 대해서도 연구하였다. 이 작품 역시 실경공연의 특징이 발견된다. 하지만 결과적으로 경제적인 효과 면에는 성공하지 못하였다.〈인상유삼저〉의 지역사회와의 문화산업적 요소를 모델로 삼아 한국의 실정에 맞는 한국형 실경공연 모델을 만들어야 할 것이다. This research is intended to look at the concept of nature scene performance and the developmental background of〈Impression Yusamieo〉to find ways to amalgamate with the local community. Also it is going to analyze nature scene performance cases that is being applied in Korea and find problems to provide theoretical data for the research on the cultural industry of performing arts inside the nature scene performance and local community. Research method includes, theoretical consideration through examining a master’s thesis about nature scene performance and a scientific treatise with investigation on news article, interviews, image materials and so on. The research ranges inside the nature scene performance concept and〈Impressions Yusamieo〉’s developmental background with amalgamative elements in〈Impressions Yusamjeo〉. Also the problems in applying nature scene performance in Korea and the outcomes are included in the research, The results in the cultural industry of nature scene performance and local community are shown below. First, it is an cultural industry of performance arts and the natural environment. Second, recreated the people’s legend from a minority race based on local culture through modern performing arts. Third, this performance was made from the participation of local residence. Fourth, it is the impact on the local economy resulted from these 3 amalgamative elements. Also researched Andong’s〈Buyong JiAae〉which bench marked〈Insang Series〉, one of the nature scene performance projected in Korea. This performance also showed amalgamative elements with the local society. However, it wasn’t economically successful. Korea should bench mark 〈Impression Yusamieo〉’s cultural industry with local society to make a Korean nature scene performance model customized for Korea. 본 연구는 실경공연의 개념과〈인상유삼저〉의 개발배경 및 세부사항을 살펴보고 지역사회와의 문화산업적 요소를 모색하고자 한다. 또한 한국에서 적용되고 있는 실경공연의 사례를 분석하고 그 문제점을 제시하여 현재 진행 중인 실경공연과 지역사회의 문화산업연구에 이론적인 자료를 제공하고자 한다. 연구방법은 실경공연에 관한 학위논문, 학술지논문 등 문헌조사를 통한 이론적인 고찰 및 신문기사, 인터뷰, 영상자료 등의 자료분석으로 이루어 졌다. 연구범위는 실경공연의 개념과〈인상유삼저〉의 개발배경 및〈인상유삼저〉에 나타난 지역사회와의 문화산업적 요소를 분석하고, 한국의 적용사례와 문제점을 제시한 결과가 포함된다. 분석결과 실경공연의 특징은 다음과 같다. 첫째, 자연환경에 공연요소를 접목한 특징이 있다. 둘째, 지역문화에 뿌리를 둔 소수민족의 민간 전설을 현대적 공연예술로 재창조 했다. 셋째, 지역주민들의 참여로 만들어진 작품이라는 것이다. 결과적으로, 이러한 3가지 특징들에 의해 나타난 문화산업적 영향은 지역사회의 경제적 효과이다. 이를 기반으로 국내에서 기획된 실경공연 중〈인상시리즈〉를 벤치마킹한 안동의〈부용지애〉에 대해서도 연구하였다. 이 작품 역시 실경공연의 특징이 발견된다. 하지만 결과적으로 경제적인 효과 면에는 성공하지 못하였다.〈인상유삼저〉의 지역사회와의 문화산업적 요소를 모델로 삼아 한국의 실정에 맞는 한국형 실경공연 모델을 만들어야 할 것이다. This research is intended to look at the concept of nature scene performance and the developmental background of〈Impression Yusamieo〉to find ways to amalgamate with the local community. Also it is going to analyze nature scene performance cases that is being applied in Korea and find problems to provide theoretical data for the research on the cultural industry of performing arts inside the nature scene performance and local community. Research method includes, theoretical consideration through examining a master’s thesis about nature scene performance and a scientific treatise with investigation on news article, interviews, image materials and so on. The research ranges inside the nature scene performance concept and〈Impressions Yusamieo〉’s developmental background with amalgamative elements in〈Impressions Yusamjeo〉. Also the problems in applying nature scene performance in Korea and the outcomes are included in the research, The results in the cultural industry of nature scene performance and local community are shown below. First, it is an cultural industry of performance arts and the natural environment. Second, recreated the people’s legend from a minority race based on local culture through modern performing arts. Third, this performance was made from the participation of local residence. Fourth, it is the impact on the local economy resulted from these 3 amalgamative elements. Also researched Andong’s〈Buyong JiAae〉which bench marked〈Insang Series〉, one of the nature scene performance projected in Korea. This performance also showed amalgamative elements with the local society. However, it wasn’t economically successful. Korea should bench mark 〈Impression Yusamieo〉’s cultural industry with local society to make a Korean nature scene performance model customized for Korea.

Selection of High Laccase-Producing Coriolopsis gallica Strain T906: Mutation Breeding, Strain Characterization, and Features of the Extracellular Laccases

( Xiaoli Xu ),( Lei Feng ),( Zhenya Han ),( Sishi Luo ),( Ai`min Wu ),( Jun Xie ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.9

Commercial application of laccase is often hampered by insufficient enzyme stocks, with very low yields obtained from natural sources. This study aimed to improve laccase production by mutation of a Coriolopsis gallica strain and to determine the biological properties of the mutant. The high-yield laccase strain C. gallica TCK was treated with N-methyl-N-nitro Nnitrosoguanidine and ultraviolet light. Among the mutants isolated, T906 was found to be a high-production strain of laccases. The mutant strain T906 was stabilized via dozens of passages, and the selected ones were further processed for optimization of metallic ion, inducers, and nutritional requirements, which resulted in the optimized liquid fermentation medium MF9. The incubation temperature and pH were optimized to be 30°C and 4.5, respectively. The mutant strain T906 showed 3-times higher laccase activity than the original strain TCK under optimized conditions, and the maximum laccase production (303 U/ml) was accomplished after 13 days. The extracellular laccase isoenzyme 1 was purified and characterized from the two strains, respectively, and their cDNA sequence was determined. Of note, the laccase isoenzyme 1 transcription levels were overtly increased in T906 mycelia compared with values obtained for strain TCK. These findings provide a basis for C. gallica modification for the production of high laccase amounts.

Effect of In Situ Thermal Stretching during Oxidative Stabilization on the Orientation of Cyclized Ladder Structure and Its Carbon Fiber

Shuai Wu,Ai-jun Gao,Liang-hua Xu 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6

The effect of in situ thermal stretching during oxidative stabilization on the orientation of cyclized ladder structure was investigated. Based on the structure evolution of PAN fibers with the increasing stabilization temperatures, the stabilization process was classified into three different stages, namely before the onset of cyclization, during cyclization in amorphous region, and during cyclization in crystalline region. The polyacrylonitrile (PAN) precursor fibers were stretched at the three stages with stretching ratios from 0 % to 8 % during continuous stabilization process. The results show that the orientation degree of cyclized ladder structure increases with the increase of stretching ratio at the three stages and the maximum orientation efficiency of cyclized ladder structure is obtained when PAN fibers are stretched at the stage of during cyclization in crystalline region. The orientation of resulting carbon fibers strongly depends on the orientation degree of cyclized ladder structure. The orientation efficiency of turbostratic graphite crystallite also agrees well with that of cyclized ladder structure. Meanwhile, the orientation efficiency of turbostratic graphite crystallite is higher than that of cyclized ladder structure and the difference values between orientation efficiency of the two structures decrease firstly then increase with the increase of degree of cyclization.

Heat stress protection in Aspen sp1 transgenic Arabidopsis thaliana

( Bo Zhu ),( Ai Sheng Xiong ),( Ri He Peng ),( Jing Xu ),( Jun Zhou ),( Jin Tao Xu ),( Xiao Fen Jin ),( Yang Zhang ),( Xi Lin Hou ),( Quan Hong Yao ) 생화학분자생물학회 2008 BMB Reports Vol.41 No.5