• Microbiology and Biotechnology Letters
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• v.23 no.5
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• pp.506-512
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• 1995

A cell aggregation factor produced by Aspergillus sp. LAM 94-142 was purified and partially characterized. The factor was purified about 15 folds from culture broth by IRA 420 and IRC 120 treatment, 1% NaCl added acetone precipitation, and Sepharose 4B column chromatography with overall yield of 48%. It was heteropolysaccharide consisted of mannose, arabinose, and glucose with a molar ratio, 31:17:2, and its molecular weight was estimated to be about 900,000 daltons by Sepharodse 4B gel filtration method. The optimum pH and temperature was 8 and 40$\circ$C, respectively. The factor was stable in pH range of 3-9 and at 100$\circ$C for 90 min. The cell aggregation activity of the factor was inhibited by the addition of Hg$^{2+}$, Fe$^{2+}$, Cu$^{2+}$, and some polypeptides such as milk casein or hemoglobin. The factor aggregated Bacillus subtilis, B. macerans, B. turingiensis, E. coli, Peudomonas aeruginosa, P. fluorescens, P. malophilia, and weakly aggregated Staphylococcus sp., Sarcina lutea, P. putida and Cryptococcus neoformnans, but it didn't aggregate various strains of Candida sp. and Saccharomyces sp.

• Proceedings of the KAIS Fall Conference
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• 2006.05a
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• pp.596-598
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• 2006

본 논문에서는 수지 조성비 및 수지탑 배열이 이온교환 특성에 미치는 영향을 조사하기 위하여 전해질 농도는 $Na^+\;125ppm$, $Cl^-\;315ppm$ 유속은 500ml/min, 이온교환 수지는 ROHM&HAAS IR 120 양이온 수지와 ROHM&HAAS IRA 402 음이온 수지를 사용하였고, 수지탑 배열은 혼상-혼상-음이온, 혼상-음이온-혼상, 음이온-혼상-혼상 수지탑 순으로, 이온교환 수지탑의 양 음이온교환 수지의 조성 비율은 1:1, 1:2, 1:3 로 변화하여 실험한 결과 이온교환 수지의 조성비 변화에서는 양 음이온교환 수지 조성비 1:2의 경우 1:1, 1:3의 경우보다 파과시간이 연장되었다. 수지탑 배열이 음이온-혼상-혼상 수지탑인 경우 혼상-혼상-음이온 수지탑 배열과 파과시간을 비교해보면 약 60% 파과시간이 연장되었다. 따라서 수지탑 배열은 음이온-혼상-혼상 수지탑 순으로, 수지 조성비는 1:2일 때 가장 효율적인 것으로 나타났다.

• Journal of The Korean Astronomical Society
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• v.39 no.3
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• pp.73-80
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• 2006

We analyze the extinction law towards several B1V stars-members of our Galaxy, searching for possible discrepancies from the galactic average extinction curve. Our photometric data allow to build extinction curves in a very broad range: from extreme UV till infrared. Two-colour diagrams, based on the collected photometric data from the ANS UV satellite, published UBV measurements and on the infrared 2MASS data of the selected stars, are constructed. Slopes of the fitted straight lines are used to build the average extinction curve and to search for discrepant objects. The selected stars have also been observed spectroscopically from the Terskol and ESO Observatories; these spectra allow to check their Sp/L's. The spectra of only about 30% of the initially selected objects resemble closely that of HD144470, considered as the standard of B1 V type. Other spectra either show some emission features or belong clearly to another spectral types. They are not used to build the extinction curve. Two-colour diagrams, constructed for the selected B1 V stars, showing no emission stellar features, prove that the interstellar extinction law is homogeneous in the Galaxy. Both the shape of the curve and the total-to-selective extinction ratio do not differ from the galactic average and the canonical value(3.1) respectively. The circumstellar emissions usually cause some discrepancies from the average interstellar extinction law; the discrepancies observed in the extraterrestrial ultraviolet, usually follow some misclassifications.

• PNF and Movement
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• v.18 no.2
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• pp.223-231
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• 2020

Purpose: The purpose of the study was to compare the effects of different methods of pelvic control on abdominal muscle activity and lumbopelvic rotation angle during active straight leg raising (ASLR) in patients with chronic back pain. Methods: The study participants were patients with low back pain (n = 30). They were instructed to perform ASLR with pelvic control, ASLR with pelvic belt, and ASLR only. Surface electromyography data were collected from the ipsilateral rectus femoris (IRF), ipsilateral internal oblique (IIO), contralateral external oblique (CEO), and ipsilateral rectus abdominal (IRA) muscles, and lumbopelvic rotation angle was measured using a motion analysis device. Results: Activation of all abdominal muscles was greater in the ASLR with pelvic control group than in the ASLR with pelvic belt and ASLR groups. The lumbopelvic rotation angle was lower in the ASLR with pelvic control group than in the other two groups (p < 0.05). Conclusion: These results suggest that ALSR with pelvic control is an effective means of increasing abdominal muscle activity and reducing unwanted lumbopelvic rotation in patients with chronic low back pain. Controlling the pelvis using the opposite leg is an effective form of ASLR exercise for patients with chronic low back pain.

• Journal of Microbiology and Biotechnology
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• v.18 no.11
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• pp.1789-1791
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• 2008

This study was aimed (i) to develop an effective method for the purification of ginsenosides for industrial use and (ii) to compare the distribution of ginsenosides in cultured wild ginseng roots (adventitious root culture of Panax ginseng) with those of red ginseng (steamed ginseng) and white ginseng (air-dried ginseng). The crude extracts of cultured wild ginseng roots, red ginseng, and white ginseng were obtained by using a 75% ethanol extraction combined with ultrasonication. This was followed sequentially by AB-8 macroporous adsorption chromatography, Amberlite IRA 900 Cl anion-exchange chromatography, and Amberlite XAD16 adsorption chromatography for further purification. The contents of total ginsenosides were increased from 4.1%, 12.1%, and 11.3% in the crude extracts of cultured wild ginseng roots, red ginseng, and white ginseng to 79.4%, 71.7%, and 72.5% in the final products, respectively. HPLC analysis demonstrated that ginsenosides in cultured wild ginseng roots were distributed in a different ratio compared with red ginseng and white ginseng.

• Journal of the Korean Chemical Society
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• v.34 no.1
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• pp.98-101
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• 1990

A new spectrophotometric determination method of scandium in the tin slag solution has been investigated using methyl thymol blue as a colorimetric reagent. Scandium is recovered by the anion exchange resin, Amberlite IRA 400, using the mixture solution of ammonium sulfate and sulfuric acid and an eluent. The mole ratio of complex of scandium and MTB at pH 6 is 1 to 1 and the wave length of the maximum absorbance is 585 nm and the molar absorptivity at this wave length is $2.0 {\times} 10^4\;\iota{\cdot}mol^{-1}{\cdot}cm^{-1}$. When tin slag solution is loaded into anion exchange resin and eluted, ions in the solution except scandium ion are eluted rapidly and scandium is eluted lately. So scandium is recovered easily.

• Journal of Korean Society for Quality Management
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• v.42 no.1
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• pp.111-127
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• 2014

Purpose: Simple part or equipment is necessary TRA(Technology Readiness Assessment) or MRA(Manufacturing Readiness Assessment). But sole maturity like TRA, MRA has limit complex systems or SoS(System of System). Especially complex weapon system need from the System Maturity Point of view. This research shows necessity of SRA(System Readiness Assessment). Methods: In case of complex systems, it is essential to SRA(System Readiness Assessment). For the purpose of calculating SRL(System Readiness Level), TRL and IRL must be calculated. And then SRL can obtain know from equation of TRL and IRL. To prove SRA effectiveness, it is calculated SRL of JTDLS(Joint Tactical DataLink System) programs. Results: SRA procedure is proposed and case study shows as examples of JTDLS programs. Although result of TRA is TRL6, result of SRA is not 0.6. From this research, we can know necessity of SRA. Especially complex systems or SoS(System of System) is essential to SRA. Conclusion: SRA(System Readiness Assessment) is required to overcome limitation of sole maturity and to achieve a successful acquisition of high quality weapon system. This research intended to suggest SRA procedure and case study in complex defense system.

• Journal of English Language & Literature
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• v.64 no.2
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• pp.151-170
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• 2018

This paper examines the relationship and ideas of Hannah Arendt and Philip Roth including how they met, their correspondence and intellectual parallels, particularly in their shared criticism of Jewish ideals and culture in Europe and North America. It analyzes similarities in their careers and texts, especially between Eichmann in Jerusalem and Operation Shylock, as well as The Ghost Writer, while measuring their reception as social commentators and writers. Kafka was an important figure for both writers, Arendt's earliest writing engaged with the significance of Kafka in understanding and criticizing twentieth century political and cultural values in Europe. For Roth, Kafka offered a similar critique of moral principles he found corroded in North American Jewish life. Arendt connected with other writers, notably Isak Dinesen, W. H. Auden, Randall Jarrell and William Styron who further linked the two: he knew both Arendt and Roth and cited, incorrectly, a work by Arendt as the source for the key incident in his 1979 novel Sophie's Choice. He claimed it was Eichmann in Jerusalem; it was Arendt's The Origins of Totalitarianism. Arendt's reaction to Roth's fiction, however, remains a mystery: she died in 1975, before Roth began to seriously and consistently engage with Holocaust issues in works like The Ghost Writer (1979) and Operation Shylock (1993). Yet even in death they are joined. Their graves are only steps apart at the Bard College Cemetery in Annandale-on-Hudson, New York.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.3
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• pp.874-890
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• 2021

With the widespread deployment of the fifth-generation (5G) communication networks, various real-time applications are rapidly increasing and generating massive traffic on backhaul network environments. In this scenario, network congestion will occur when the communication and computation resources exceed the maximum available capacity, which severely degrades the network performance. To alleviate this problem, this paper proposed an intelligent resource allocation (IRA) to integrate with the extant resource adjustment (ERA) approach mainly based on the convergence of support vector machine (SVM) algorithm, software-defined networking (SDN), and mobile edge computing (MEC) paradigms. The proposed scheme acquires predictable schedules to adapt the downlink (DL) transmission towards off-peak hour intervals as a predominant priority. Accordingly, the peak hour bandwidth resources for serving real-time uplink (UL) transmission enlarge its capacity for a variety of mission-critical applications. Furthermore, to advance and boost gateway computation resources, MEC servers are implemented and integrated with the proposed scheme in this study. In the conclusive simulation results, the performance evaluation analyzes and compares the proposed scheme with the conventional approach over a variety of QoS metrics including network delay, jitter, packet drop ratio, packet delivery ratio, and throughput.

• Asian-Australasian Journal of Animal Sciences
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• v.27 no.5
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• pp.609-615
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• 2014

Appetite-related neuropeptides proopiomelanocortin (POMC) and Neuropeptide Y (NPY) are essential for regulating feeding behavior and energy homeostasis. The objective of this study was to evaluate the effects of variants in POMC and NPY genes on growth, carcass and meat quality traits in rabbits. A total of six SNPs were identified for POMC (n = 2) and NPY (n = 4) genes by direct sequencing. Three SNPs were subsequently genotyped by using MassArray system (Sequenom iPLEXassay) in 235 individuals, which belong to three meat rabbit breeds, including 93 Ira rabbits; 81 Champagne rabbits and 61 Tianfu black rabbits. The SNP c.112-12G>T was in intron-exon boundaries (intron 1) of POMC gene, and the association analysis showed that individuals with TT genotype had a greater 84 d body weight (BW84), eviscerated weight and semi-eviscerated weight than those with GT genotype (p<0.05); the TT individuals were also higher than those GG in the ripe meat ratio (RMR) (p<0.05). The g.1778G>C SNP, which was in complete linkage with other three SNPs (g.1491G>A, g.1525G>T and g.1530C>T) in intron 1 of NPY gene, was significantly correlated with eviscerated slaughter percentage and semi-eviscerated slaughter percentage in rabbits, and the individuals with CC genotype had a better performance than CG genotype (p<0.05). These findings would provide primary clues for the biological roles of POMC and NPY underlying the rabbit growth-related traits.