회수수에 처리되는 당류계 안정화제의 혼입률 변화가 콘크리트의 품질에 미치는 영향

文學龍,金虎林,우종완,한민철,한천구 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

The objective of present paper is to investigate the engineering properties of concrete using recycling water incorporating saccharic based stabilizing agent in order to improve qualities of concrete in the region of normal strength and high strength. According to test results, fluidity and air content do not exhibit significant difference with an increase in stabilizing agent contents. Bleeding was not observed at 30% of W Ie, regardless of stabilizing agent contents, nonetheless, concrete with stabilizing agent of 0.15% was observed to occur the least bleeding at 40 and 50% of W IC. For setting time, although presence of recycled water accelerates setting time, setting time shows to be retarded gradually with an increase in stabilizing agent content. For compressive strength, use of stabilizing agent enhanced compressive strength of concrete compared with that of concrete without stabilizing agent. In the side of strength enhancement, adequate dosage of stabilizing agent is found to be 0.15%. As dosage of stabilizing agent increased above 0.15%, drying shrinkage exhibited a tendency to decrease.

시멘트의 분말도 변화에 따른 시멘트 모르터의 역학적 특성

文學龍,김경민,전충근,윤기원,양성환,한천구 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

This study discusses the influence of fineness of cement on mechanical properties of cement mortar. According to the result, compressive strength increases in order of C>B>OPC>A and C>B>A>OPC at mixture proportion of 1:1 and 1:3 respectively. An increase of compressive strength by increase of fineness of cement is because internal structure of concrete grows dense by an increase of hydration reaction. As for curing condition, compressive strength is higher in standard curing than in air curing at mixture proportion of 1:1 and 1:3. There is not any tendency of strength development with age and fineness of cement by 91days. Length change by drying shrinkage increases in order of C>B>OPC>A at mixture proportion of 1:1 and 1:3 due to an increase of water content by variation of W/C.

경영에서 grab start와 track start의 운동학적 분석

김연정,이민형,원문학,김헌수 한국운동역학회 2000 한국운동역학회지 Vol.10 No.1

본 연구는 남녀 수영 선수 6명씩을 대상으로 grab start와 track start를 실시하여 두 집단간과 두 출발법간의 동작 특성을 운동학적으로 분석한 후 변인들을 정량화 하여 선수들에게 출발법에 대한 심층적인 이해를 제공하고 효과적인 훈련에 기여하도록 하는 것이 목적이며 실험으로 카메라 4대를 이용하였으며 분석을 위해 권(1993)이 개발한 Kwon3D 동작 분석 프로그램으로 3차원 영상 분석을 실시하였다. 결과의 통계 처리 자료로는 SPSS 프로그램을 사용하였으며 출발에 관련된 운동학적 변인을 수평방향과 수직방향에서의 인체 중심점 위치와 속도의 변화를 측정하였다. 위치 변화에서는 출발대를 떠나는 지점에서 남자 선수들은 수직 지향을 여자 선수들은 수평 지향을 함을 알 수 있었고 속도 변화에서 출발대를 떠나는 순간 track start가 속도값이 크기는 하나 두 출발법 사이에 유의한 차이는 나타나지 않았다. The research has the aim to analyze and find out kinematic features of grab start and track start between male and femail. With having selected 6 swimmers form each for this experiment four video-cameras(60 frames/sec) and control-box(length-2m, width-1m, hight-1m) to get real space coordinates were used. The DLT method was employed to obtain the 3-dimensional coordinates of the 25 body points for digitizing with Kwon3D Motion Analysis Package developed by Kwon, Young-hoo (1993). SPSS was used for statistic process. Kinematic variable were measured in start: The center of mass of body in horizontal and vertical, variation of velocity, entry distance. The following are the results. 1. In change of the body-center, the starting methods of man and women are same in horizontal directions, but in vertical directions the amount of women´s body changement is decreasing ever, while the amount of man´s body changement is increasing continuously with his foot off the start line. The change of the position and velocity in vertical directions is changing with the same tendency in case of starting ways of both man and women, but in vertical directions man´s amount of changement has steep increasing curve, and women´s one has decreasing curve. 2. Horizontal ANOVA analysis of body-center shows that starting method represent not such difference at taking-off moment but significant difference at initial moving point(F=237.016, p<.01). Vertical analysis shows significant difference in gender and starting method(for each F=31.132, p<.01, f=22.591, p<.01)

Covalent Immobilization of Penicillin G Acylase onto Fe₃O₄@Chitosan Magnetic Nanoparticles

( Xiao Min Ling ),( Xiang Yu Wang ),( Ping Ma ),( Yi Yang ),( Jie Mei Qin ),( Xue Jun Zhang ),( Ye Wang Zhang ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.5

Penicillin G acylase (PGA) was immobilized on magnetic Fe₃O₄@chitosan nanoparticles through the Schiff base reaction. The immobilization conditions were optimized as follows: enzyme/support 8.8 mg/g, pH 6.0, time 40 min, and temperature 25℃. Under these conditions, a high immobilization efficiency of 75% and a protein loading of 6.2 mg/g-support were obtained. Broader working pH and higher thermostability were achieved by the immobilization. In addition, the immobilized PGA retained 75% initial activity after ten cycles. Kinetic parameters Vmax and Km of the free and immobilized PGAs were determined as 0.113 mmol/min/mg-protein and 0.059 mmol/min/mg-protein, and 0.68 mM and 1.19 mM, respectively. Synthesis of amoxicillin with the immobilized PGA was carried out in 40% ethylene glycol at 25℃ and a conversion of 72% was obtained. These results showed that the immobilization of PGA onto magnetic chitosan nanoparticles is an efficient and simple way for preparation of stable PGA.

Study on Corner Reflectors Identification in Highway Deformation Monitoring

Xue Min Xing,De Bao Wen,Fang Bin Zhou 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.12

CRInSAR is a newly developed technique to monitor ground deformation. In CRInSAR algorithm, the identification of Corner Reflectors in SAR images is necessary. Due to the uncertainty of traditional identification method, a new method based on the intensity and correlation coefficient of each CR candidates in SAR images is presented. The method has been successfully used to determine the locations of 11 CRs installed along a highway in six SAR images over the study area. The results show that the identification accuracy of the new method is about 1 pixel. It is effective and reliable especially in the area with lots of lightspots around the CR points. The method proposed can play important role in the highway deformation monitoring within CRInSAR algorithm.

Characterization of a novel Cotesia vestalis polydnavirus (CvBV) gene containing a ser-rich motif expressed in Plutella xylostella Larvae

Min Shi,Ya Feng Chen,Fang Huang,Xue Ping Zhou,Xue Xin Chen 한국생화학분자생물학회 2008 BMB Reports Vol.41 No.8

Size-selective pH-operated megagates on mesoporous silica materials.

Xue, Min,Cao, Dennis,Stoddart, J Fraser,Zink, Jeffrey I RSC Pub 2012 Nanoscale Vol.4 No.23

<P>pH-responsive megagates have been fabricated around mesoporous silica material SBA-15 in order to mechanize the mesopores. These megagates remain closed in neutral conditions, but open at pH 5. The capping components of the megagates were designed to be capable of controlling pores up to 6.5 nm in diameter. Selectivity of payloads with different sizes can be achieved through the use of different capping components. The operation of the megagates was demonstrated by time-resolved fluorescence spectroscopy which is capable of monitoring the release of both the payload and the cap. This study opens up new possibilities in the field of controllable release.</P>

Who prepares dinner tonight?

Min, Xue 이화여자대학교 아시아여성학센터 1999 Asian Journal of Women's Studies(AJWS) Vol.5 No.1

Plasma Macrophage Migration Inhibitory Factor and CCL3 as Potential Biomarkers for Distinguishing Patients with Nasopharyngeal Carcinoma from High-Risk Individuals Who Have Positive Epstein-Barr Virus Capsid Antigen-Specific IgA

Ning Xue,Jian-Hua Lin,Shan Xing,Dan Liu,Shi-Bing Li,Yan-Zhen Lai,Xue-Ping Wang,Min-Jie Mao,Qian Zhong,Mu-Sheng Zeng,Wan-Li Liu 대한암학회 2019 Cancer Research and Treatment Vol.51 No.1

Purpose The purpose of this study was to identify novel plasma biomarkers for distinguishing nasopharyngeal carcinoma (NPC) patients from healthy individuals who have positive Epstein-Barr virus (EBV) viral capsid antigen (VCA-IgA). Materials and Methods One hundred seventy-four plasma cytokines were analyzed by a Cytokine Array in eight healthy individuals with positive EBV VCA-IgA and eight patients with NPC. Real-time polymerase chain reaction, Western blotting, enzyme-linked immunosorbent assay (ELISA), and immunohistochemistry were employed to detect the expression levels of macrophage migration inhibitory factor (MIF) and CC chemokine ligand 3 (CCL3) in NPC cell lines and tumor tissues. Plasma MIF and CCL3 were measured by ELISA in 138 NPC patients, 127 EBV VCA-IgA negative (VN) and 100 EBV VCA-IgA positive healthy donors (VP). Plasma EBV VCA-IgA was determined by immunoenzymatic techniques. Results Thirty-four of the 174 cytokines varied significantly between the VP and NPC group. Plasma MIF and CCL3 were significantly elevated in NPC patients compared with VN and VP. Combination of MIF and CCL3 could be used for the differential diagnosis of NPC from VN cohort (area under the curve [AUC], 0.913; sensitivity, 90.00%; specificity, 80.30%), and combination of MIF, CCL3, and VCA-IgA could be used for the differential diagnosis of NPC from VP cohort (AUC, 0.920; sensitivity, 90.00%; specificity, 84.00%), from (VN+VP) cohort (AUC, 0.961; sensitivity, 90.00%; specificity, 92.00%). Overexpressions of MIF and CCL3 were observed in NPC plasma, NPC cell lines and NPC tissues. Conclusion Plasma MIF, CCL3, and VCA-IgA combination significantly improves the diagnostic specificity of NPC in high-risk individuals.

Use of Beauveria bassiana in combination with commercial insecticides to manage Phauda flammans (Walker) (Lepidoptera: Phaudidae): Testing for compatibility and synergy

Chen Xue-Min,Wang Xiao-Yun,Lu Wen,Zheng Xia-Lin 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.2

An entomopathogenic fungal strain, Beauveria bassiana PfBb, was identified from Phauda flammans (Lepidoptera: Phaudidae) larvae. The compatibility and synergy of B. bassiana PfBb employed in combination with three concentrations (i.e., recommended concentration, 20% and 10% of the recommended concentration) of five commercial insecticides were determined. Beta cypermethrin at 10% of recommended concentration had the lowest inhibitory effect on the mycelial growth of B. bassiana PfBb compared with other insecticides. Insecticides utilized at recommended concentration had no significant effect on the sporulation of B. bassiana PfBb, while the extent of their effect at 20% and 10% of recommended concentration differed among insecticides. Insecticides at 10% of recommended concentration had the lowest inhibition of sporulation and conidial germination compared with other concentrations. The conidial germination of B. bassiana PfBb was the highest after treatment with beta cypermethrin at 10% of recommended concentration. The cumulative mortality for 1 × 10 7 spores/mL B. bassiana PfBb combined with each insecticide at 10% of recommended concentration was higher than that observed with the application of insecticides alone. The percent cadavers of Phauda flammans larvae observed after treatment with B. bassiana PfBb combined with beta cypermethrin at 10% of recommended concentration were not significantly different from those observed after infection with B. bassiana PfBb alone. Our findings demonstrate that B. bassiana PfBb combined with beta cypermethrin at 10% of recommended concentration could increase the efficiency of this insecticide.