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Xun-an Ning,Chongyang Yang,Yujie Wang,Zuoyi Yang,Jingyu Wang,Ruijing Li 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.4
A strict aerobic Acinetobacter baumanniiYNWH 226, isolated from an activated sludge reactortreating textile wastewater, was able to grow on Congo redas the sole carbon source under aerobic conditions. Thedecolorization and TOC reduction efficiency were 99.1 and93.72%, respectively. The effects of the Congo redconcentration were studied. The environmental factors (i.e.,pH, temperature and agitation speed) on the biodegradationof Congo red in aqueous phase were studied and evaluatedusing response surface methodology. The results indicatedthat when the Congo red concentration was 100 mg/L, theoptimal decolorization conditions were as follows: 37°C,pH 7.0 and 180 rpm. The single A. baumannii YNWH 226was able to form aromatic amines by reductive breakage ofthe azo bond and then oxidize them into non-toxicmetabolites.
The effect of SiO2 on the performance of inorganic sludge-based structural concretes
Zheng Xun Yang,Na Ra Ha,이종국,Min Sik Jang,황규홍 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.3
As a relatively new material, geopolymer concrete offers benefits as a construction material for sustainable development. It utilizes waste materials such as recycled concrete sludge, fly ash, etc. It has a very low rate of green house gas emission when compared to ordinary Portland cement. In this study, the components of geopolymer are concrete sludge, metakaolin and water glass. NaOH was used as an alkaline activator. To improve the mechanical properties, silica fume was added as a bonding matrix from 0%-10% to replace part of the concrete sludge, and the specimens were cured in air, then their mechanical properties such as compressive strength and bending strength were measured and their microstructures were investigated.
Yuejiao Yang,Jie Chen,Liming Yang,Bin Chen,Zhenmei Sheng,Wenyun Luo,Guoping Sui,Xun Lu,Jianxin Chen 한국원자력학회 2016 Nuclear Engineering and Technology Vol.48 No.3
D-(+)-glucose (Glc) was added to the original Fricke polyvinyl alcoholeglutaraldehydeexylenol orange (FPGX) hydrogel dosimeter system to make a more stable FPGX hydrogelthree-dimensional dosimeter in this paper. Polyvinyl alcohol was used as a substrate,which was combined with Fricke solution. Various concentrations of Glc were tested withlinear relevant fitting for optimal hydrogel production conditions. The effects of variousformulations on the stability and sensitivity of dosimeters were evaluated. The resultsindicated that D-(+)-Glc, as a free radical scavenger, had a great effect on stabilizing thedose response related to absorbency and reducing the auto-oxidization of ferrous ions. Acareful doping with Glc could slow down the color change of the dosimeter before and afterradiation without any effect on the sensitivity of the dosimeter.
楊焄(Xun Yang) 중국어문논역학회 2009 中國語文論譯叢刊 Vol.0 No.25
韓國의 歷代 詞文學 創作에 대한 ?究는 지금까지 그 대부분이 高麗時期의 李奎報와 李齊賢을 비롯한 그리 많지 않은 작가에게만 집중되어 있었다. 이는 바로 韓國의 歷代 詞 작품에 대한 체계적이고 총체적인 정리작업이 오래도록 이루어지지 못했던 것이 가장 큰 원인이라고 할 수 있다. 柳己洙 교수가 최근 들어 엮어낸 《歷代韓國詞總集》에는 高麗 시기에서부터 朝鮮 시기에 이르기까지의 모두 171명 작가의 1250수 남짓한 작품이 실려 있다. 이 책은 현재로서는 가장 잘 두루 갖춰진 韓國詞總集이라고 할 수 있다. 韓國의 詞를 연구하려면, 이 책은 빠트릴 수 없는 가장 기본적인 문헌이다. 그러나 이 책에는 적잖은 문제점들이 있으니, 이러한 한계를 넘어서 보다 나아간 연구를 이루어내기 위해서는, 이 책의 정리과정에서 나타난 몇몇 잘못들을 밝혀내 바로 잡을 필요가 있다. 본 논문은 이 책에 나타나는 일부 잘못들을 표점(標點)의 잘못, 자구(字句)의 오독, 내용의 뒤섞임, 중복수록, 고증의 한계 다섯 종류로 나누어 교정 작업을 진행하였고 나아가 잘못이 벌어지게 된 원인을 살펴보았다. 본서가 앞으로 내용적으로 보다 더 충실하기 위해서는, 중국과 일본의 관련이 있는 문헌 자료에 대하여 보다 더 많은 주의를 기울여야만 할 것이다. 이 밖에도 한국의 학자들이 앞으로 《歷代韓國詞總集》을 보다 더 완벽하게 교정하기를 희망하며, 그와 동시에 한국에서도 중국의 《詞林紀事》와 《詞話叢編》을 닮은 저작들이 나타나기를 희망한다.
Yang, Fan,Li, Ya,Sheng, Xun,Liu, Yu The Korean Society of Pharmacology 2021 The Korean Journal of Physiology & Pharmacology Vol.25 No.2
Neonatal hypoxia/ischemia (H/I), injures white matter, results in neuronal loss, disturbs myelin formation, and neural network development. Neuroinflammation and oxidative stress have been reported in neonatal hypoxic brain injuries. We investigated whether Paeoniflorin treatment reduced H/I-induced inflammation and oxidative stress and improved white matter integrity in a neonatal rodent model. Seven-day old Sprague-Dawley pups were exposed to H/I. Paeoniflorin (6.25, 12.5, or 25 mg/kg body weight) was administered every day via oral gavage from postpartum day 3 (P3) to P14, and an hour before induction of H/I. Pups were sacrificed 24 h (P8) and 72 h (P10) following H/I. Paeoniflorin reduced the apoptosis of neurons and attenuated cerebral infarct volume. Elevated expression of cleaved caspase-3 and Bad were regulated. Paeoniflorin decreased oxidative stress by lowering levels of malondialdehyde and reactive oxygen species generation and while, and it enhanced glutathione content. Microglial activation and the TLR4/NF-κB signaling were significantly down-regulated. The degree of inflammatory mediators (interleukin 1β and tumor necrosis factor-α) were reduced. Paeoniflorin markedly prevented white matter injury via improving expression of myelin binding protein and increasing O1-positive olidgodendrocyte and O4-positive oligodendrocyte counts. The present investigation demonstrates the potent protective efficiency of paeoniflorin supplementation against H/I-induced brain injury by effectually preventing neuronal loss, microglial activation, and white matter injury via reducing oxidative stress and inflammatory pathways.
Provably Secure Aggregate Signcryption Scheme
Xun-Yi Ren,Zheng-Hua Qi,Yang Geng 한국전자통신연구원 2012 ETRI Journal Vol.34 No.3
An aggregate signature scheme is a digital signature scheme that allows aggregation of n distinct signatures by n distinct users on n distinct messages. In this paper, we present an aggregate signcryption scheme (ASC) that is useful for reducing the size of certification chains (by aggregating all signatures in the chain) and for reducing message size in secure routing protocols. The new ASC scheme combines identity-based encryption and the aggregation of signatures in a practical way that can simultaneously satisfy the security requirements for confidentiality and authentication. We formally prove the security of the new scheme in a random oracle model with respect to security properties IND-CCA2, AUTH-CMA2,and EUF-CMA.
LMI Stability Criterion with Less Variables for Time-delay Systems
Xun-Lin Zhu,Tao Li,Chong Lin,Lei Guo,Guang-Hong Yang 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.4
Slack variables approach is an important technique for tackling the delay-dependent stability problem for systems with time-varying delay. In this paper, a new delay-dependent stability criterion is presented without introducing any slack variable. The technique is based on a simply integral inequal-ity. The result is shown to be equivalent to some existing ones but includes the least number of vari-ables. Thus, redundant selection and computation can be avoided so that the computational burden can be largely reduced. Numerical examples are given to illustrate the effectiveness of the proposed stabil-ity conditions.