• Title/Summary/Keyword: Ts-effect

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Effect of TS Concentration on Anaerobic Digestion using Supernatant of Food Waste (음식물류 폐기물 혐기성 소화에 있어서 TS농도 영향)

  • Jang, Eun-sung;Ruy, Seung-hun;Phae, Chae-gun
    • Journal of the Korea Organic Resources Recycling Association
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    • v.15 no.2
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    • pp.118-127
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    • 2007
  • This study investigated the effect of varying TS concentration levels using supernatant of food waste. The experiment was performed at varying TS concentration levels ranging from 5% to 10% by a $35^{\circ}C$-mesophilic digestion reactor, dual digestion system with acid and methane fermenters combined. As a result, removal efficiency and stabilization were observed at TS concentration of 7~8%, But the removal efficiency notably decreased at 8% or higher TS level. At a stabilized phase of the reactor, more than $0.3m^3/kg{\cdot}vs$ gas was produced, with phenomena such as salt accumulation and increase of pH level being unnoticed. These results indicate that the increase of anaerobic digestion of food waste supernatant TS content has an effect on reaction and that it is necessary to control and operate concentration within 8%, given that the effect is stronger at 8% or higher.

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Effect of Triterpenoidal Glycosides of Dammarane Series and Their Aglycones on Phase Transitions of Dipalmitoylphosphatidylcholine (DPPC의 상전이에 미치는 Dammarane Series의 Triterpenoidal Glycoside와 그 Aglycone의 영향)

  • Kim, Yu.A.;Park, Kyeong-Mee;Park, Hwa-Jin
    • Journal of Ginseng Research
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    • v.20 no.1
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    • pp.23-29
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    • 1996
  • The effect of ginseng glycosides and their aglycones on the thermodynamic characteristics of membranes from dipalmitoylphosphatidylcholine (DPPC) was investigated. Total saponins (TS) from Korean red ginseng, Panax ginseng C.A. Meyer, interacted with the Eel Phase of lipid in the Polar region and did not penetrate the deeper glycerol backbone of lipid molecule. From the all investigated components of TS (aglycons and ginsenosides), only 20-(S)-panaxadiol (PD) had an effect similar to TS. High concentration of TS penetrated in hydrophobic Cl-C8 region. The presence of cholesterol did not influence the interaction of TS with DPPC. An elimination of transition, however, took place at 10~100 $\mu\textrm{g}$/ml of TS. DPPC had a low ability to interact with cholesterol (CHL) as compared with other lecithins except ethanolamine. From our results, only TS and PD, at high concentrations (100 mol%), influenced the phase transition of mixture of DPPC:CHL.

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A study on effects of ISO/TS 16949 quality management system on customer satisfaction and organizational performance (ISO/TS 16949 품질경영시스템이 고객만족과 조직성과에 미치는 영향에 관한 연구)

  • Kim, Min-Kyeong;Kang, Kyung-sik
    • Journal of the Korea Safety Management & Science
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    • v.19 no.1
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    • pp.145-156
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    • 2017
  • This study was conducted to grasp problems of the present and investigate the real condition of organizations by making how an organizational ISO/TS 16949 quality management system has a positive effect on process improvement, perceived organizational support has a significant effect on the relationship between ISO/TS 16949 requirements and process improvement, process improvement has a positive effect on customer satisfaction and organizational performance research projects. For doing them, it tris to suggest an effective application plan of ISO/TS 16949 certification through improvements about corporate quality management systems of the automobile field by investigating and analyzing literature of the precedent studies and ISO/TS 16949 certification effects actually, conducting and analyzing an survey on effects on customer satisfaction and organizational performance, and drawing the problems.

Development of Acoustic Target Strength Analysis System for Submarine

  • Kwon, Hyun-Wung;Hong, Suk-Yoon;Jeon, Jae-Jin;Song, Jee-Hun
    • International Journal of Ocean System Engineering
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    • v.3 no.3
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    • pp.158-163
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    • 2013
  • The acoustic target strength (TS) is one of the most important parameters for a submarine's stealth design. Because modem submarines are larger than their predecessors, TS must be managed at each design stage in order to reduce it. To predict the TS of a submarine, TASTRAN R1 was developed based on a Kirchhoff approximation in a high-frequency range. This program can present TS values that include multi-bounce effect in the exterior and interior of the structure by combining geometric optics (GO) and physical optics (PO) methods, anechoic coating effect by using the reflection coefficient, and response time pattern for a detected target. In this paper, TS calculations for a submarine model with the above effects are simulated by using this developed program, and the TS results are discussed.

The Antioxidant Activity of Nelumbinis Stamen in GC-2 spd(ts) Cells (연수(蓮鬚)가 GC-2 spd(ts) Cell의 항산화에 미치는 영향)

  • Park, Eun-Hwa;Chang, Mun-Seog;Kil, Ki-Jeong;Park, Seong-Kyu
    • The Korea Journal of Herbology
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    • v.27 no.5
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    • pp.15-20
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    • 2012
  • Objectives : The purpose of this study was to estimate the antioxidant activity of water extract of Nelumbinis stamen (WNS) in GC-2 spd (ts) cells. Methods : we investigated the effect of WNS in mouse GC-2 spd (ts) cells by MTT assay. The protective effects of WNS against hydrogen peroxide-induced oxidative stress in GC-2 spd (ts) cells were examined by measuring cell viability. Lipid peroxidation levels and catalase were measured. Results : WNS showed cell viability as 101.9, 108.9, 111.8, 125.8, 134.5% in 2.5, 5, 10, 25, 50 ${\mu}g/ml$ concentrations, respectively. The protective effect of WNS concentration was 2.5 ${\mu}g/ml$ against hydrogen peroxide-induced oxidative stress in GC-2 spd (ts) cells. LPO were decreased significantly at 2.5, 5, 25 ${\mu}g/ml$ of WNS concentrations. Catalase activity was significantly increased at 2.5, 5 and 10 ${\mu}g/ml$ of WNS concentrations, respectively. Conclusions : In conclusion, WNS has antioxidant activities in GC-2 spd(ts) cells against oxidative stress.

Four-Week Repeated Intravenous Dose Toxicity and Toxicokinetic Study of TS-DP2, a Novel Human Granulocyte Colony Stimulating Factor in Rats

  • Lee, JooBuom;Lee, Kyungsun;Choe, Keunbum;Jung, Hyunseob;Cho, Hyunseok;Choi, Kiseok;Kim, Taegon;Kim, Seojin;Lee, Hyeong-Seok;Cha, Mi-Jin;Song, Si-Whan;Lee, Chul Kyu;Chun, Gie-Taek
    • Toxicological Research
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    • v.31 no.4
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    • pp.371-392
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    • 2015
  • TS-DP2 is a recombinant human granulocyte colony stimulating factor (rhG-CSF) manufactured by TS Corporation. We conducted a four-week study of TS-DP2 (test article) in repeated intravenous doses in male and female Sprague-Dawley (SD) rats. Lenograstim was used as a reference article and was administered intravenously at a dose of $1000{\mu}g/kg/day$. Rats received TS-DP2 intravenously at doses of 250, 500, and $1000{\mu}g/kg/day$ once daily for 4 weeks, and evaluated following a 2-week recovery period. Edema in the hind limbs and loss of mean body weight and body weight gain were observed in both the highest dose group of TS-DP2 and the lenograstim group in male rats. Fibro-osseous lesions were observed in the lenograstim group in both sexes, and at all groups of TS-DP2 in males, and at doses of TS-DP2 $500{\mu}g/kg/day$ and higher in females. The lesion was considered a toxicological change. Therefore, bone is the primary toxicological target of TS-DP2. The lowest observed adverse effect level (LOAEL) in males was $250{\mu}g/kg/day$, and no observed adverse effect level (NOAEL) in females was $250{\mu}g/kg/day$ in this study. In the toxicokinetic study, the serum concentrations of G-CSF were maintained until 8 hr after administration. The systemic exposures ($AUC_{0-24h}$ and $C_0$) were not markedly different between male and female rats, between the administration periods, or between TS-DP2 and lenograstim. In conclusion, TS-DP2 shows toxicological similarity to lenograstim over 4-weeks of repeated doses in rats.

Seismic Performance of RC Frame System Retrofitted with TS Seismic Strengthening Method(Part 2:Analytical Study) (TS 제진공법으로 내진보강된 철근콘크리트 골조의 내진성능(Part 2:해석적 연구))

  • Jung, Myung-Cheol;Song, Jeong-Weon;Song, Jin-Kyu
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.22 no.2
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    • pp.148-153
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    • 2018
  • In this study, the nonlinear time history analysis of seismic retrofitted structures with TS damper for seven ground motion records was conducted for the purpose of verifying the seismic strengthening effect of TS seismic retrofitting method. Through comparison of the interstory drift ratio and the energy dissipation amount of the non - reinforced structure obtained and those of retrofitted structures with TS damper from the nonlinear time history analysis, the interstory drift ratio was reduced by about 30% and the amount of energy dissipation through the structure was halved. As a result, it was confirmed that the damping performance of the TS seismic retrofitting method is excellent.

Development of an Input Impedance Evaluation of the AC-DC Transfer Standard for Low Level AC Voltage Standard (교류 저전압 표준용 교류-직류 변환기의 입력임피던스 평가기술 개발)

  • Kwon, Sung-Won;Jung, Jae-Kap;Lee, Sang-Hwa;Kim, Myung-Soo;Kim, Han-Jun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.2
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    • pp.229-234
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    • 2008
  • An AC-DC transfer standard(TS) is used for the AC voltage standard in the range of 2 mV to 1000 V below 1 MHz. Micro-potentiometer(${\mu}Pot$) is used to evaluate the ac-dc transfer difference(ADD) of the TS below 200 mV range. The ADD of the TS were changed by the loading effect caused from the input impedance change of the TS depend on frequency. An input impedance evaluation technique of the TS using ${\mu}Pot$ has been developed.

The Study on an Using Effect of Head Mounted Display to the Body in Virtual Environments (가상환경에서의 HMD사용이 인체에 미치는 영향에 관한 연구)

  • 이창민;정진희
    • Journal of Korea Multimedia Society
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    • v.3 no.4
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    • pp.389-398
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    • 2000
  • The focus of this study is to investigate how personal display system - Head Mounted Display(HMD) and VDU-affect to the body in virtual environments. This prediction was tested by a comparing of playing 3D games while wearing a HMD and monitoring a VDU for an hour. As quantitative measuring and analyzing tools, SSQ, RSSQ, pre and post posture stability test and vision test are used. The results showed that SSQ and RSSQ total score (TS) are related with the results of pre and post posture stability test and SSQ and RSSQ TS of HMD is higher than TS of VDU by one point five times. Especially, TS of MRG3C, having large field of view, has a possibility by two times of simulator sickness (SS). And in order to investigate the degree of SS regarding to the simulator control condition, two conditions, subjective-passive and subjective-active environments were compared. However, there was no significant difference between two environments. The repetition of the same environment has no effect to reduce the SS. Disorientation and oculomotor scores of the SSQ and RSSQ are higher than that of another symptoms. In addition, RSSQ score of strain/confusion is higher than that of nausea. Therefore, we assume that personal fear could possibly increase the simulator sickness in virtual environments.

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Phenol Hydroxylation over TS-1 Synthesized by Hydrothermal and Microwave Heating Method: Solvent Dependence (수열 합성법과 마이크로파 가열법으로 제조한 TS-1 촉매에 의한 페놀 수산화 반응: 용매의 영향)

  • Kwon, Song-Yi;Yoon, Song-Hun;Lee, Jong-Min;Chang, Jong-San;Lee, Chul-Wee
    • Korean Chemical Engineering Research
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    • v.49 no.2
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    • pp.151-154
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    • 2011
  • Catalytic activity such as conversion and selectivity on the phenol hydroxylation over TS-1 prepared by hydrothermal method and microwave heating method, respectively, was compared and discussed for understanding the dependence of solvent such as water, methanol, acetone, respectively, during phenol hydroxylation, with hydrogen peroxide. Basic physical properties such as XRD, EDS, SEM and $N_{2}$ adsorption/desorption were determined and compared. The relationship between catalytic activity and physical properties of TS-1 was explained.