• 한국생물공학회:학술대회논문집
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• 2001.11a
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• pp.808-811
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• 2001

The rheological properties of exopolysaccharide(EPS-R) produced by marine bacteria Hahella chjuensis KCTC 2395 was investigated. EPS-R solution showed a characteristic non-Newtonian behavior fluid properties. In aqueose dispersions of EPS-R 1%, consistency index(K) and flow behavior index(n) were 1,410 cp and 0.73. EPS-R solution was pseudoplastic fluid by power-low model. Rheological propertie of EPS-R was found to be influenced by the concentration of salt, pH, temperature and ionic compounds.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.1
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• pp.53-57
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• 1996

Xanthomonas sp. EPS-1으로부터 생산된 다당류 EPS-1 용액의 농도가 0.04(g/dl)일 때, 비점도는 0.137, 환원 점도는 3.425, 상대점도는 1.137, 고유점도는 3.209임을 알 수 있었다. 겉보기 점도는 온도상슴에 따라 낮아졌으나 다시 온도를 증가하였을때는 서서히 증가하였다. 열처리 후에도 물성은 거의 변화지 않았으며, 응집성은 좋지 않았으나 locust bean gum과의 혼합효과는 우수하였다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.352-356
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• 2011

주로 탄화수소화합물로 구성된 EPS(Expended poly styrene)는 뛰어난 단열성능, 경제성, 건식공법의 시공편리성으로 단열재로 많이 사용되지만 화재에 취약한 단점이 있다. 최근 EPS패널의 다양한 난연화를 통해 난연EPS패널제품이 개발되고 있고 시장에서의 사용이 증가되고 있다. 그러나 가짜 난연EPS제품의 사용이 사회적 문제가 되고 있는 것도 현실이다. 본 연구에서는 난연EPS와 일반EPS가 성분이 다른점을 이용하여, 현장에서 시공되고 있는 시료의 진위여부 판단을 위해 X-선형광분석기(XRF)를 사용한 원소분석을 시도하였다. 분석결과 매우 간단한 방법으로 시료의 진위여부를 확인할 수 있었으며, 따라서 현장에서 사용될 수 있는 분석법으로 적용가능성에 대하여 고찰하였다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.1
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• pp.76-79
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• 2000

The effects of packaging conditions on freshness extension of squash (Cucurbita moscata) were investigated during 7-day storage at 2$0^{\circ}C$. Weight loss of squash packed with corrugated paperboard box (control) was 5.5%, and those of LDPE (low density polyethylene, Ф0.02 mm), LDPE (Ф0.04mm) film and EPS (expanded polystyrene) box were 0.9%, 0.8%, and 1.1%, respectively. Firmness of EPS was 11% higher than that of control, chlorophill content of squash packed with EPS box was 18.9% higher, and total ascorbic acid content of squash packed with EPS box was 29.4% higher than that of control. Quality of packed squash was not different between EPS packages and LDPE packages. Decay of control was 1~2 pieces per box, but was not found in the LDPE, EPS box. Preferences in overall appearences of LDPE, EPS box was better than those of control.

• Journal of the Korean Society for Railway
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• v.5 no.2
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• pp.61-69
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• 2002

Recycling of dredged soils as construction materials is experimently discussed in this paper. The strength of light-weighted soils(LWS) consisting of expanded polystyrene(EPS), dredged soils and cement is characterized by uniaxial and triaxial compression tests with varying initial water contents of dredged soils, the EPS volume and cement contents, and expanded ratio of EPS. Test results show that the strength of light-weighted soils increases with adding cement contents, whereas the strength increases with decreasing initial water contents of dredged soils and expanded ratio of EPS. It was, however, found that increasing the EPS volume makes a lower the strength of light-weighted soils.

• 환경사랑
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• s.60
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• pp.6-7
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• 2011

2011년도 EUMEPS(유럽EPS생산자기구) 총회가 지난 5월 9일, 10일 체코 프라하에서 개최되었다. 아시아EPS생산자기구(AMEPS)를 대표하여 회의에 참석했던 협회 최주섭 부회장이 정리한 유럽의 EPS재활용 현황의 주요 내용을 소개한다.

• Journal of Microbiology and Biotechnology
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• v.17 no.1
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• pp.44-51
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• 2007

Marine bacterial strains were isolated trom coastal regions of Goa and screened for the strains that produce the highest amount of mucous expolysaccharide (EPS). Our screening resulted in the identification of the strain Vibrio furnissii VB0S3 (hereafter called VB0S3), as it produced the highest EPS in batch cultures during the late logarithmic growth phase. The isolate was identified as VB0S3 based on morphological and biochemical properties. Growth and EPS production were studied in mineral salts medium supplemented with NaCl (1.5%) and glucose (0.2%). The exopolymer was recovered from the culture supernatant by using three volumes of cold ethanol precipitation and dialysis procedure. Chemical analyses of EPS revealed that it is primarily composed of neutral sugars, uronic acids, and proteins. Fourier-transform infrared (FT-IR) spectroscopy revealed the presence of carboxyl, hydroxyl, and amide groups, which correspond to a typical heteropolymeric polysaccharide, and the EPS also possessed good emulsification activity. The gas chromatographic analysis of an alditol-acetate derivatized sample of EPS revealed that it was mainly composed of galactose and glucose. Minor components found were mannose, rhamnose, fucose, ribose, arabinose, and xylose. EPS was readily isolated from culture supernatants, which suggests that the EPS was a slime-like exopolysaccharide. This is the first report of exopolysaccharide characterization that describes the isolation and characterization of an EPS expressed by Vibrio surnissii strain VB0S3. The results of the study contribute significantly and go a long way towards an understanding of the correlation between growth and EPS production, chemical composition, and industrial applications of the exopolysaccharide in environmental biotechnology and bioremediation.

• Food Science and Preservation
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• v.6 no.3
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• pp.255-259
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• 1999

This study was measured weight loss, total ascorbic acids, titratable acidity and soluble solids contents to investigate the effect of EPS(expended polystrene foam) box, double wall corrugated paperboard box and LDPE film pouches during storage at 25oC. The rate of weight loss was 5.9% in corrugated paperboard box after 7 days, but those of 20LD, 40LD film and EPS box were 1.1, 1.0, and 1.1% , respectively. Total ascorbic acid content of EPS box was 20% higher than that in corrugated paperboard box, but the obvious differents were not observed among the LDPE film pouches and EPS box. The titratable acidity was decrease during storage, but total soluble solids content was increase. Overall appearences of LDPE pouches and EPS box were better than those of corrugated paperboard box.

• Journal of Korean Society on Water Environment
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• v.39 no.2
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• pp.175-180
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• 2023

The aim of this study was to compare the fouling characteristics of Extracellular polymeric substances (EPS) secreted by Chlorella vulgaris with the case of Bacterial-MBR (BMBR), Microalgal-MBR (MMBR) for advanced wastewater treatment using the Laboratory scale, in order to suggest a method to minimize fouling in MMBR by identifying the effects of amounts and compositions of EPS secreted by C. vulgaris and bacteria in the activated sludge on fouling. Contrary to expectations, fouling occurred relatively severely in the MMBR from the beginning of the operation than in the BMBR. Reasons for such a fouling pattern were considered to be the effect of C-EPS, which accumulates on the membrane surface of MMBR 30 times more than that on the membrane surface of activated sludge (BMBR). In this respect, according to the results of this experiment and a comparative review of several previous studies, it was confirmed that unlike activated sludge, in which the ratio of P-EPS was relatively higher than that of C-EPS, in case of C. vulgaris, the ratio of C-EPS to P-EPS was relatively higher than that in case of activated sludge. This was presumed to be the main cause of the significant fouling phenomenon in MMBR. However, an increase in TMP with increasing C-EPS concentration was not observed.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.1874-1879
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• 2004

This paper validates new type electric power steering (EPS) system which is driven by a uni-direction rotational motor and two electromagnetic clutches. The assist motor of the new type EPS produces a torque for assisting the steering in only one direction and two electromagnetic clutches transmit the assist torque to the pinion gear in either left or right direction with respect to the steering rotation. In order to evaluate the static and dynamic characteristics of the new type EPS, the EPS has been modeled by using the well known customized software such as MSC.ADAMS and MSC.CarSim. The ADAMS software has been used to investigate the static characteristics of the proposed system. ADAMS, however, can not describe dynamics of a vehicle and perform the simulation under the various road conditions. Thus the dynamic characteristics of the vehicle including the EPS are analyzed very well by using the CarSim software. A sinusoidal steering input command is applied to the propose EPS system in order to evaluate the static characteristics, while the double lane changes are applied to the vehicle with the EPS in order to evaluate the dynamic performance. Through a series of simulations, we can conclude that the propose EPS shows the stable dynamic characteristics when the rotational direction is changed.