• 한국전자파학회논문지
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• 제27권9호
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• pp.834-843
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• 2016

본 논문에서는 PIN 다이오드를 이용한 S-대역 고출력 경로선택형 SP4T 및 SP4T 구동회로의 설계를 보였다. 격리도 개선을 위하여 SP4T의 각 경로(path)는 직렬 및 병렬 PIN 다이오드 2개를 cascade하여 구성하였다. 설계된 SP4T 회로는 칩-형 PIN 다이오드와 박막(thin-film) 기법으로 제작된 20 mil AIN 기판을 사용하여 구현하였다. 또한, 설계된 SP4T의 구동회로는 1개의 multiplexer와 4개의 NMOS-PMOS push-pull 쌍을 이용하여 구성하였다. 온-웨이퍼 측정결과, 제작된 SP4T는 최대 삽입손실 1.1 dB, 최소격리도 41 dB의 특성을 보였다. 구동회로의 PIN 다이오드의 on-off, off-on 천이시간은 동일 PIN 다이오드의 패키지를 이용하여 시험하였으며, 모두 약 100 nsec 이하의 천이시간을 보였다. 150 W 입력 고출력 시험 결과, 격리도와 삽입손실은 동축 패키지의 손실 및 부정합을 고려하면 온-웨이퍼 측정결과에 준하는 결과를 얻었다.

• 한국전자파학회논문지
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• 제13권5호
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• pp.451-458
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• 2002

6-18 GHz 주파수대역에서 사용되는 흡수형의 SP3T 및 SP8T 스위치 모듈을 설계 및 제작하였다. 스위치 모듈에 사용된 MMIC 칩의 에피구조는 저 손실과 고 전력용으로 설계되었다. 최대입력전력은 SP3T 스위치 모듈이 2 W이고 SP8T 스위치 모듈이 1 W이다. 200 nsec의 고속 스위칭을 위한 구동회로를 모듈에 내장하였다. 모듈의 최대삽입손실은 SP3T 및 SP8T에 대해 각각 2.8 dB, 4.2 dB로 측정되었다. 입ㆍ출력포트간 분리도는 모두 55 dB 이상을 얻을 수 있었다. 두 스위치 모듈은 전자전 시스템에 적용하기 위한 관련 환경시험을 모두 통과하였다.

• 한국양식학회지
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• 제11권2호
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• pp.231-240
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• 1998

온도와 염분에 대하여 내성이 강하고 대량배양이 쉬워서 조개류의 인공종묘생산시 먹이로서 많이 사용하고 있는 5종의 Tetraselmis (T. tetrathele, T. suecica, T. subcordiformis, T. sp. (Haeundae), T. sp (China)) 중 우리나라 기후 환경에 대향배양이 가장 적합한 종을 선택하기 위핵서 최적 배양환경 (온도, 염분)을 조사하고 이때의 세포크기와 영양성분을 조사하였다. 5종의 Tetraselmis의 세포크기 및 체적은 T. sp. (Haeundea)가 장경 $17.6{\pm}1.87$${\mu}$m, 체적 727${\mu}$$m^3$로 가장 대형종이었으며 중국산 T. sp.가 장경14.6+- 1.46${\mu}$m, 체적 625${\mu}$$m^3$으로 가장 소형종이였다. Tetraselmis는 광염성, 광온성이나 최적성장을 위한 수온과 염분 구간은 각각 24~$30^{\circ}C.$와 27~30%.였다. 5종의 Tetraselmis에서 고수온에 대한 내성은 중국산 Tetraselmis, 저수온데 대한 내성은 T. tetrathele가 높은 것으로 나타났다. 5종의 Tetraselmis중 배양밀도가 가장 높았던 종은 T. suecica였으며, 이 종은 배양 7일째 $24^{\circ}C.$, 30%.에서 세포수가 $141{\times}10^4$cells/ml (s.g.r., 0.3906)로 성장이 가장 좋았다. 5종의 Tetraselmis의 화학성분중 조단백질 함량은 T. suecica가 44.50%로 가장 높게 나타났고 조지방은 해운대산 T. sp.가 7.13%로 높게 나타났다. 필수아미노산은 해운대산 .T.sp.에서 50.40%로 가장 높게 나타났고, 불포화지방산은 중국산 T.sp.에서 11.7%로 가장 높게 나타났다. 5종의 Tetraselmis의 성장과 영양성분 결과로 보아 우리나라에서 대량배양이 가장 적합한 종은 T. seucica임을 알수 있었다.

• Korean Journal of Acupuncture
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• 제28권3호
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• pp.25-32
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• 2011

Objectives : The purpose of this study is to find parameters to compare the effects of Sa-Am acupuncture with stomach-tonification (ST) and Sa-Am acupuncture with spleen-tonification (SP) on radial pulse. Methods : Forty healthy subjects participated in this study. Radial pulse was measured using 3 dimensional pulse imaging system (DMP-3000) before, right after, 30 minutes after, and 60 minutes after acupuncture. Results : 1. The parameters analysed in this study were changed in the same direction with different degrees by ST and SP. 2. In males, SP manipulation showed significantly increased pulse period and (T-T4)/T, and significantly decreased T1/T, T4/T, T4/(T-T4), and F1~F3 frequencies compared to ST. 3. In females, ST manipulation showed significantly increased (T-T4)/T, and significantly decreased F1~F3 frequencies compared to SP. Conclusions : The parameters analysed in this study may be used to differentiate the effects between ST and SP on radial pulse. These parameters are more strongly affected by SP than ST in males whereas more strongly affected by ST than SP in females.

• 여성건강간호학회지
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• 제8권2호
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• pp.244-256
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• 2002

The purpose of this study was to examine the effects on labor pain and duration of delivery time for primipara women treated by San-Yin-Jiao(SP-6) and Hob-Gog(LI-4) acupressure. The design of this study was a nonequivalent control group non-synchronizedpost test only design. It was done to identify the effects of SP-6 acupressure or LI-4 acupressure on labor pain in primipara women. The benefits of using SP-6 acupressure or LI-4 acupressure were evaluated by comparing three groups, a SP-6 acupressure group, a LI-4 acupressure group and a control group, not treated with acupressure. The participants included 192 primiparas who underwent vaginal delivery, 72 primiparas in the control group, 71 in the SP-6 acupressure group and 49 in the LI-4 acupressure group. Data were collected using a structured questionnaire consisting of general characteristics, a subjective labor pain scale (Johnson, 1974), and measurement of duration of delivery time. The results of this study are summarized as follows : 1. Differences in the acupressure effect for SP-6 and LI-4 were analyzed using Scheffe's test which showed that differences in the control group vs the SP-6 group and the control group vs the LI-4 group were statistically significant (t=21.767, p<0.05; t=23.923, p<0.05), but the SP-6 group vs the LI-4 group showed no significant differences. 2. The duration of delivery time in the group which had SP-6 acupressure or LI-4 acupressure was shorter (400.77${\pm}$153.34; 379.10${\pm}$127.60) than in the control group (528.68${\pm}$239.08). Differences in the effects of acupressure with SP-6 and LI-4 were also analyzed by Scheffe's test. Control group vs SP-6 group and Control group vs LI-4 group were significantly different(t=127.91, p<0.05; t=149.58, p<0.05), but the SP-6 group vs the LI-4 group did not show any statistically significant difference (t=21.67). This study has shown that SP-6 and LI-4 acupressure were both effective in relation to labor pain and duration of delivery time for primiparas. But it is necessary to replicate the study with a larger number of participants to generalize of the results.

• Journal of Microbiology and Biotechnology
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• 제34권7호
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• pp.1475-1483
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• 2024

Three Gram-stain-positive, aerobic, rod-shaped, and non-motile bacteria, labelled as W11^T, SW19^T, and YR1^T, were isolated from soil, and performed their polyphasic taxonomic investigation. The phylogenetic and 16S rRNA gene sequence analysis showed that strains W11^T, SW19^T, and YR1^T belonged to the genera Agromyces, Rathayibacter, and Nocardioides, respectively. Strain W11^T was closely affiliated with Agromyces cavernae SYSU K20354^T (98.1%), strain SW19^T showed the closest affiliation with Rathayibacter rubneri ZW T2_19^T (97.0%), and strain YR1^T was most closely related to Nocardioides marmorisolisilvae KIS18-7^T (98.0%). The genome sizes of strains W11^T, SW19^T, and YR1^T were 4,181,720 bp, 4,740,677 bp, and 4,228,226 bp, respectively, with DNA G+C contents of 70.5%, 64.2%, and 69.7%, respectively. Average nucleotide identity and digital DNA-DNA hybridization values of W11^T, SW19^T, and YR1^T with their respective reference species were <79.6% and <23.6%, respectively. The predominant cellular fatty acids detected in strain W11^T were anteiso-C_15:0, iso-C_16:0, and anteiso-C_17:0. In strain SW19^T, they were summed feature 9 (C_16:0 10-methyl and/or iso-C_17:1ω 9c), anteiso-C_17:0, and anteiso-C_15:0. Strain YR1^T exhibited C_18:1ω 9c, C_18:0 10-methyl, TBSA, and anteiso-C_15:0 as its major cellular fatty acids. Overall, the polyphasic taxonomic comparisons indicated that strains W11^T, SW19^T, and YR1^T represent novel species within the genera Agromyces, Rathayibacter, and Nocardioides, respectively. Accordingly, we propose the names Agromyces silvae sp. nov., with the type strain W11^T (=KCTC 49818^T =NBRC 115999^T), Rathayibacter soli sp. nov., with the type strain SW19^T (=KCTC 49860^T =NBRC 116108^T), and Nocardioides terrisoli sp. nov., with the type strain YR1^T (=KCTC 49863^T =NBRC 116165^T).

• 한국균학회지
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• 제51권4호
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• pp.361-371
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• 2023

The study was undertaken to isolate and characterize wild yeast strains from soil samples collected in Seoul, Korea. Among the 19 yeast strains obtained, 17 were previously recorded species. The remaining two strains, Wickerhamomyces sp. GW1-4 and Archaeorhizomyces sp. YB4-103 were new species candidates. The genomic and microbiological characteristics of GW1-4 and YB4-103 were investigated. Phylogenetic analyses based on the 26S rRNA gene sequences and internal transcribed sequences, GW1-4 and YB4-103, represent a distinct lineage within the family Phaffomycetaceae and Archaeorhizomycetaceae, respectively. The GW1-4 and YB4-103 strains had the highest sequence homology with Wickerhamomyces xylosivorus NBRC 111553^T (88.97%) and Archaeorhizomyces finlayi CBS 128710^T (87.55%), respectively.

• 대한전자공학회논문지TC
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• 제48권1호
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• pp.97-101
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• 2011

개인 휴대통신의 서비스 대역에 대응하는 4중 대역 p-HEMT SP6T 스위치를 구현하였다. 낮은 삽입손실과 높은 격리특성을 달성하기 위하여, 트랜지스터 단위소자의 최적화를 통해 On-Off간 상호 보완적 관계를 고려하였으며, 특히 송수선간 격리 특성의 경우, 큰 커패시터 삽입을 통하여 우수한 격리 특성을 달성하는 동시에 단일의 전압제어와 백비아를 사용한 접지를 통해 소형화를 달성하였다. 구현된 SP6T 스위치는 $950um{\times}100um$의 크기를 가지며 공정상 게이트 우물의 오류를 감안할 때, 각 주파수 대역에서 우수한 삽입손실 및 격리특성을 확인 할 수 있었다.

• 미생물학회지
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• 제41권3호
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• pp.195-200
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• 2005

Comamonas sp. strain DJ-12의 pmcABCDEFT 유전자군은 protocatechuate (PCA)의 분해과정에 관여하는 PCA 4,5-dioxygenase, 4-carboxy-2hydroxymuconic semialdehyde (CHMS) dehydrogenase, 2-pyrone04,5-dicarboxylate(PDC) hydrolase, 4-oxalomesaconate (OMA) hydratase, 그리고 4-oxalocitramalate (OCM) aldolase 등의 효소들을 생산하는 유전자들과 transporter의 역학을 하는 유전자로 각각 확인되었다. 이 유전자군은 Comamonas sp. strain DJ-12의 chromosomal DNA로부터 얻은 PCR 산물들을 T-vector에 ligation하여 재조합 플라스미드 pMT1, pMT2, pMT3, pMT4, pMT5, pMT6, pMT7, pMT8, pMT9, pMT10을 제조하였다. 이들 재조합 플라스미드의 염기서열을 분석한 결과 PCA 4,5-dioxygenase 유전자는 alpha(pmcA)와 beta(pmcB) 두 개의 subunit으로 구성 되어있으며, 각각 450 bp와 870 bp이었다. CHMS dehydrogenase 유전자(pmcC)는 960 bp, PDC hydrolase 유전자(pmcD)는 918 bp이였으며, OMA hydratase 유전자(pmcE)는 1029 bp, OCM aldolase 유전자 (pmcF)는 689 bp, 그리고 transporter 유전자(pmcT)는 1,398 bp이였다. 이들 pmc 유전자들은 pmcT-pmcE-pmcF-pmcD-pmcA-pmcB-pmcC의 순서로 배열되어 있었다. Comamonas sp. strain DJ-12의 pmcABCDEFT 유전자산물의 아미노산 서열을 분석한 결과, Comamonas testosteroni BR6020 및 Psedomonas ochraceae NG.J1와 $94{\~}98\%$의 높은 유사성을 보였고, 그 유전자들의 배열 순서도 동일하였다. 그러나 Sphingomonas paucimobilis SYK-6, Sphingomonas sp. LB126, 그리고 Arthrobacter keyser 12B와는 아미노산 서열이 $52{\~}74\%$의 유사성을 보였고, 그 유전자의 배열 구조도 상이하였다.

• 대한수의학회지
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• 제22권2호
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• pp.121-138
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• 1982

The present study was conducted in order to investigate the role of yeast-like fungi in bovine mastitis. Attempts were made to isolate and identify yeast-like fungi from the milk from normal udders and those with clinical or subclinical mastitis and from feces. Also incuded in the study were trials for the pathogenicity of the isolates for laboratory animals and efficacy of an anti-fungal drug for the treatment of mastitis. A total of 133 isolates of yeast-like fungi was made from milk and feces and they were identified as Candida (C.) albicans (5 isolates), C. krusei (63 isolates), C. tropicalis (27 isolates), Torulopsis (T.) glabrata (10 isolates), Rhodotourla sp. (6 isolates), Hansenula sp. (6 isolates) and Pichia sp. (1 isolate). Sixty seven strains of yeast-like fungi were isolated from the milk of 64 quarters (4.3% of quarters examined) of 55 cows (14.3% of cows examined). C. krusei, C. tropicalis, C. pseudotropicalis, C. parapsilosis and T. glabrata were isolated as the causative agents from 20 quarters (1.3% of quarters examined) with clinical mastitis. C. krusei, C. tropicalis, C. albicans, C. pseudotropicalis, T. glabrata, Rhodotorula sp. and Hansenula sp. were isolated as the causative agents from 22 quarters (1.5% quarters examined) with subclinical mastitis. C. tropicalis, C. krusei, T. glabrata and Rhodotorula sp. were isolated as the contaminants from 22 normal quarters (1.5% of quarters examined). C. krusei, C albicans, C. tropicalis, C. pseudotropicalis, C. parapsilosis, T. glabrata, Hansenula sp., Rhodotorula sp. and Pichia sp. were isolated as the contaminants from feces and all of the species except Pichia sp. were isolated from milk of the same cows at the some time. Intramammary infusion of nystatin was effective for the treatment of mastitis caused by C. albicans, C. krusei, C. tropicalis, C. pseudotoropicalis, C. parapsilosis, T. glabrata and Rhodotorula sp. C. albicans, C. krusei, C. tropicalis, C. pseudotropicalis, T. glabrata, Hamsenula sp. and Pichia sp. were pathogenic for rat but C. parapsilosis and Rhodotorula sp. were not.