• Title/Summary/Keyword: LC3

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Lactococcus lactis Culture Methods for the Enhanced Depression of Inducers in Atopic Diseases (아토피유발인자 억제효과를 증대하는 Lactococcus lactis의 배양방법)

  • Jo, Yu-Ran;Kang, Sang-Mo
    • Microbiology and Biotechnology Letters
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    • v.40 no.4
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    • pp.310-318
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    • 2012
  • We conducted a screening and checked the cultivation methods of lactic acid bacteria, which have anti-atopic dermatitis functions, by determining the lactic acid bacteria's immune enhancement by FACS, and antimicrobial activity against Staphylococcus aureus. The increase of Tcell CD4+/CD25+/foxp3+ was bigger in Lactobacillus plantarum than Lactococcus lactis subsp. lactis (Lc. lactis) and the antimicrobacterial activity against S. aureus was the opposite. The antimicrobial activity of Lb. plantarum culture with medium containing Lc. lactis culture broth was not enhanced, but the antimicrobial activity of Lc. lactis cultured in a medium containing Lb. plantarum culture broth was enhanced. As the optimal method caltivation of Lc. lactis in a medium containing 10% of heat-killed Lb. plantarum culture broth was chosen. By this method, the antibacterial activity of the pure Lc. lactis culture increased sharply at the end of the log phase, while a restraint effect on the growth of S. aureus increased 1.29 times.

Design of Variable Active Inductor with Feedback LC-Resonator for Improvement of Q-Factor and Tuning of Operating Frequency (Q 지수의 개선과 동작 주파수 조절을 위해 궤환 LC-공진기를 이용한 가변 능동 인덕터의 설계)

  • Seo, Su-Jin;Ryu, Nam-Sik;Choi, Heung-Jae;Jeong, Yong-Chae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.19 no.3
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    • pp.311-320
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    • 2008
  • In this paper, a new variable active inductor using a conventional grounded active inductor with feedback variable LC-resonator is proposed. The grounded active inductor is realized by the gyrator-C topology and the variable LC-resonator is realized by the low-Q spiral inductor and varactor. This variable LC-resonator can compensate the degradation of Q-factor due to parasitic capacitance of a transistor, and the frequency range with high Q-factor is adjustable by resonance frequency adjustment of LC-resonator. The fabricated variable active inductor with Magnachip $0.18{\mu}m$ CMOS process shows that high-Q frequency range can be adjusted according to varactor control voltage from 4.66 GHz to 5.45 GHz and Q-factor is higher than 50 in the operating frequency ranges. The measured inductance at 4.9GHz can be controlled from 4.12 nH to 5.97 nH by control voltage.

Performance Analysis or MC / DS CDMA System with Hybrid SC / MRC Diversity over Multi-path Fading Channels (다중경로 페이딩 채널에서 Hybrid SC/MRC 기법이 적용된 MC / DS CDMA 시스템의 성능분석)

  • 김원섭;박진수
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.7A
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    • pp.748-755
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    • 2004
  • In this paper, the hybrid SC/MRC technique was applied to the MC/DS-CDMA system in the Nakagami-m multi-path fading environment. The applied scheme was compared with other cases when the MRC technique was applied and then performances were analyzed. The result of analysis showed that the performance of the applied system, whose number of branches (L) for the input diversity of each carrier wave was 3 and かme selected number of branches ( Lc) was 2, was better than that of the MRC technique when the Lc of the MRC technique was 2. The performance of the applied system was lower than that of the MRC technique, then the Lc of the MRC technique was 3. However, as the fading index was lowered, which means the telecommunication environment deteriorated, the performance of the hybrid SC/MRC-(2/3) diversity technique when Lc of MRC technique was 3, was almost the same as that of the MRC technique. The hybrid SC/MRC-(2/3) diversity technique shows a similar performance to that of the MRC technique, when the Lc of the MRC technique was 4. Therefore, it was confirmed that the MC/DS-CDMA system could reduce complexity and achieve similar performance to that of the MRC by applying the hybrid SC/MRC technique, which utilized the advantages of the SC technique and high performance of the MRC scheme, rather than the MRC diversity technique that requires bit synchronization, frequency of fading, and phase synchronization for every diversity branch.

Acute Toxicity on Daphnia Magna for Electric Cable Factory Wastewater (물벼룩에 의한 전선공장폐수의 급성독성가)

  • Chae, Su-Gwon;Kim, Nam-Cheon;Kim, Geon-Heung
    • Water for future
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    • v.25 no.2
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    • pp.61-66
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    • 1992
  • This study was to determine the static acute toxicity on Daphnia magna for the Electric cable Factory Wastewater. Activated sludge process was used to treat the wastewater with three different F/M ratios, 0.36, 0.2, 0.1 mg COD/day.mg MLSS. The results of laboratory bioassay with Daphnia magna were as follows. 1)24hr, 48hr-LC$ of the influent were 17.33% and 11.73%. 2)24hr-LC $ of effluents treated with F/M ratio 0.36,0.26 and 0.1mg COD/day.mg MLSS were 26.69% 32.70% and 38.36% respectively, 48-LC$ of these effluents were 14.48% 27.88% and 31.58% respectively. 3)According to various F/M ratios, the ratios of dffluent 48hr-LC$ to filtrated 48hr-LC$ were 1.58, 1.83 and 1.47respectively 4)Activated sludge process effluents treated with activated carbon had little toxicity on Daphnia magna.

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Analysis of Output Characteristics and Design of LC Filter for Line-Interactive 3-Phase APF (3상 라인인터액티브형 능동전력필터 시스템을 위한 LC필터 출력특성 해석 및 설계)

  • 김응진
    • Proceedings of the KIPE Conference
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    • 2000.07a
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    • pp.127-132
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    • 2000
  • This paper describes a 3-phase Line-Interactive APF system and analyzes its operating characteristics considering LC Filter output characteristics. Topology of APF is similar to that of Off-Line UPS in the point of parallelly operating inverter system. So it is possible to be multi-functioned active compensating system according to power condition. Likewise this actively operating system from APF to UPS and vice versa is often to be called Line-Interactive system. And more than that Line-Interactive system needs precise design of LC filter on converter output side to make this system fully operate in both APF and UPS modes. The problem in this point is how to design LC Filter to be contented with two different system characteristics so this paper analyzes this problem and proposes its design procedures. Then suggested filter design is verified to be contented by the simulations and experimental results

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Analysis of Entamoeba histolytica Membrane via LC-MALDI-TOF/TOF

  • Ujang, Jorim Anak;Noordin, Rahmah;Othman, Nurulhasanah
    • Mass Spectrometry Letters
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    • v.10 no.3
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    • pp.84-87
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    • 2019
  • Liquid chromatography mass spectrometry is widely employed in proteomics studies. One of such instruments is the Liquid Chromatography (LC)-Matrix-assisted laser desorption ionisation (MALDI)-Time of flight (TOF) or LC-MALDI-TOF/TOF. In this study, this instrument was used to identify the membrane proteins of a protozoan parasite namely Entamoeba histolytica. It causes amoebiasis in human. The E. histolytica trophozoites were cultured prior to the membrane protein extraction using the conventional method, $ProteoPrep^{(R)}$ and $ProteoExtract^{(R)}$ kits. Then, the membrane protein extracts were trypticdigested and analysed by LC-MALDI-TOF/TOF. Approximately, 194 proteins were identified and 27.8% (54) were predicted as membrane proteins having 1 to 15 transmembrane regions and signal peptides by combining all three extraction methods. Also, this study has discovered 3 unique proteins as compared to our previous study which merit further investigation.

Effects of Lonicerae Caulis (LC) on Allergic Contact Dermatitis (ACD) induced by DNCB in mice (인동등(忍冬藤)이 DNCB로 유발된 알레르기성 접촉피부염에 미치는 영향)

  • Lee, Yu-Jin;Lee, Ho-Chan;Choi, Jung-Hwa;Kim, Jong-Han;Park, Soo-Yeon
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.30 no.3
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    • pp.46-61
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    • 2017
  • Objectives : Allergic contact dermatitis(ACD) is a type IV delayed hypersensitivity reaction that results from cumulative exposures and subsequent sensitization to an environmental chemical. Lonicerae Caulis(LC) can clear away heat and relieve toxin, disperse wind and heat, dredge the channel. The present study was designed to investigate the effects of LC on allergic contact dermatitis(ACD) induced by 2,4-dinitrochlorobenzene(DNCB) in mice. Methods : In this experiment, the effects of LC on changes in body weights, ear and dorsum skin thicknesses, ear weights, clinical aspects on the dorsum skin, histopathological changes, spleen/body ratio, cytokines were investigated. In addition, the effects on proliferations of splenocytes were also investigated in vitro and vivo study. Results : LC spread(SPR) group and LC spread and administered(SPR+ADM) group showed diminished ear thicknesses. In SPR+ADM group, ear weights were lowered significantly compared to contact dermatitis control(CTL) group. LC treatment diminished erythema, desquamation and keratosis which were induced by repeated painting of DNCB. In histopathological observation, spongiosis and edema were diminished in SPR and SPR+ADM group. In cytokines, SPR+ADM group were increased in IL-10, and SPR and SPR+ADM group were decreased in TNF-${\alpha}$ compared with control group. Conclusions : These data suggest that LC can decrease symptoms of ACD, then LC is useful to treat patient with ACD.

Input LC Fiter Design of Diode Rectifiers Considering Filter VA Rating Reduction (필터소자의 용량 저감을 고려한 다이오드 정류기의 입력LC필터 설계)

  • 임영철;정영국
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.12 no.1
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    • pp.35-44
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    • 1998
  • In this paper, input LC filter design of diode rectifiers considering filter V A rating reduction has been propoesd. It consisted of an input LC parallel resonent tank whose inductor and capacitor values are se$.$ lected so that the input filter presents an infinite impedance to harmonic input ac current component. The operation of proposed input filter has been analyzed in detail under steady state conditions. Performance evaluation and related design data have been provided on Per Unit basis for the proper implementation of diode rectification system. Finally, Detailed input and output current analysis has shown that the proposed input filter yield high quality input ac current waveforms, in particular, high input power factor values and more reliabilty which reducing the V A rating of passive components as compared to the standard type LC filter.filter.

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The Current and Power Waveform Improvement of a $3{\Phi}$ Induction Motor with LC Filter Driven by a Digital Bridge Inverter (디지탈 브리지형 인버터로 구동되는 3상유도전동기의 LC 필터에 의한 전류 및 전력 파형 개선)

  • Chung, J.Y.;Park, J.G.;Kang, C.N.
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.553-555
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    • 1996
  • This paper concerns with a method to improve the current and power waveforms of the variable speed $3{\Phi}$ AC motor system driven by the single-pulse PWM, and the current waveforms and $3{\Phi}$ power waveforms are analyzed by FFT under various running conditions. By the performance analysis through the experiments, the following results have been obtained. AC source of pseudo sine waveform can be obtained from the modulated alternating square voltage by means of the well designed LC filter. It is confirmed that current waveforms and $3{\Phi}$ power waveforms can be improved by utilizing the high order low pass LC filter than that of lower order. Especially, current waveforms and $3{\Phi}$ power waveforms tan be much improved at low frequency domain. $3{\Phi}$ power waveforms have a smatter ripple and bigger power by utilizing the high order low pass LC filter than that of lower order. Also, the running condition of $3{\Phi}$ AC motor is good at low frequency domain.

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Use of Pellet Type Phenolic Foam as a Medium for Production of Plug Seedlings of 'Madison' Tomato (토마토 플러그 묘 생산을 위한 배지로서 펠릿형 Phenolic Foam의 이용)

  • No, Kyoung Ok;Kang, Jeong Hwa;Kim, Hye Min;An, Chul Geon;Jeong, Byong Ryong;Hwang, Seung Jae
    • Journal of Bio-Environment Control
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    • v.21 no.3
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    • pp.199-206
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    • 2012
  • This study was conducted in a glasshouse to examine the possibility of producing tomato plug seedlings in a newly-developed inert phenolic foam medium. Plug seedlings of 'Madison' tomato were grown in four pellet type media, Grodan rockwool, UR rockwool, phenolic foam LC, and phenolic foam LC-lite. Seed germination was checked for 7 days. Seedling growth was measured at 19 days after sowing. The greatest germination was obtained in the phenolic foam LC and phenolic foam LC-lite. Plant height, hypocotyl length, leaf area, dry weight, and fresh weight were significantly greater in the rockwool medium than those in the other media. However, the T/R ratio and stem diameter were the greatest in the phenolic foam LC than those in the other media. The total porosity and container capacity of the phenolic foam LC was higher than in the other media. The air space (%) was lowest in the phenolic foam LC. Overall, the phenolic foam LC and phenolic foam LC-lite produced seedlings with similar growth as the rockwool. These results suggested that both phenolic foam LC and phenolic foam LC-lite have potential to be used in production of plug seedlings of 'Madison' tomato.