• 한국동물위생학회지
• /
• 제23권4호
• /
• pp.335-340
• /
• 2000

The study was Investigated detectable limits of antibiotic drugs in treatment of mastitis by TTC II reduction test. The detectable limits of antibiotic drugs by TTC II reduction test were summarized as follows, 1. Detectable limits to compounds drugs were higher than those of monodrugs. 2. Detectable limits to ointments were lower than injections.

• Journal of Astronomy and Space Sciences
• /
• 제16권2호
• /
• pp.191-198
• /
• 1999

Results of RF compatibility test between KOMPSAT(Korea Multi-Purpose SATellite) and TTC(Tracking, Telemetry, and Command) station are described. S/C(Spacecreft) RF Test, telemetry test, command test, ranging test, and tracking receiver test were performed with respect to pass/fail criteria. To provide physical RF interface between KOMPSAT and TTC equipment, direct low cable and antenna-to-antenna interface were implemented. Through RF compatibility test, it was fully demonstrated that KOMPSAT and TTC equipment are functionally workable.

• 한국동물위생학회지
• /
• 제15권2호
• /
• pp.101-108
• /
• 1992

This study was carried out to investigate the effect of sulfamethazine and trimethoprim on TTC test in raw milk. Ten raw milks which does not contain any antibiotics were collected from milk farms and one hundred twenty raw milks which collected from three raw milk receiving stations and those milk samples were mixed up sulfamethazine and trimethoprim for TTC test. The results were as follows ; 1. Positive reactions of TTC test were shown above the concentration of 3, 000ppm for sulfamethazine and 10ppm for trimethoprim. 2. When the TTC test was conducted with trimethoprim and sulfamethazine mixture, a pair of the concentration of trimethoprim and sulfamethazine shown to positive reaction were 0.1-2, 000ppm, 0.5-1, 000ppm, 1.0-250ppm and 2.0-100ppm, respectively. 3. Of 120 raw milk samples tested, 16 samples(13%) were shown quasi-positive reaction when the trimethoprim at the concetration of 2ppm was added in the samples.

• 아시안잔디학회지
• /
• 제3권1호
• /
• pp.13-15
• /
• 1989

In oder to find out the effective seed germination testing method to the field emergence, an experiment was conducted ; 1. TTC testing results were higher percentage than any other germination testing methods . 2. On the corn seed , field emergence was highly correlated with germinator test, TTC test and AA test hut cold test was lower percentage . 3. Field emergence , on the soybean seeds was highly correlated with AA test and cold test but germinator test and TTC test was higher percentage .

• 한국우주과학회:학술대회논문집(한국우주과학회보)
• /
• 한국우주과학회 2004년도 한국우주과학회보 제13권2호
• /
• pp.344-346
• /
• 2004

KOMPSAT-2 (Korea Multi Purpose Satellite 2) which is scheduled to launch in 2005 year will communicate with KARI TTC (Tracking, Telemetry, and Command) station flying along sun synchronous orbits (685 km). The command from KARI TTC passes S-band omni-antenna, RF assembly, and transponder and finally reachs OBC (On Board Computer). The telemetry from KOMPSAT-2 arrives at KARI TTC through inverse procedure. In this paper, RF compatibility test between KOMPSAT-2 and KARI TTC station is demonstrated. RF interface for this test was established through real space and uplink signal test and downlink signal test and uplink & downlink signal test were performed.

• 대한수의학회지
• /
• 제39권3호
• /
• pp.609-615
• /
• 1999

From July of 1997 to June of 1998, total 279 raw milk samples over withdrawal period after mastitis treatment from dairy farms located in the provinces of Kyonggi and Choongchung were collected to test drug residues. Each sample was tested by TTC- II test and Delvotest SP. Among the total 152 raw milk samples of cow treated by ${\beta}$-lactams, 32 samples(21.2%) were positive on the Delvotest and 15 samples(9.9%) showed positive on the TTC-II test. Also, from the total 37 samples treated by sulfonamides, 5 samples(13.5%) were positive on the Delvotest and 3 samples(8.1%) showed positive on the TTC-II test. For the total 55 raw milk samples of cow treated by tetracyclines, 9 samples(16.4%) were positive on the Delvotest and 5 samples(9.1%) showed positive on the TTC-II test. In addition, from the total 35 samples treated by aminoglycosides, 7 samples(20.0%) were positive on the Delvotest and 5 samples(14.3%) showed positive on the TTC-II test. Our study shows that it is possible that drugs are to be detected by the drug residues test of an individual raw milk even over the withdrawal period after mastitis treatment and the raw milk of bulk tank.

• 대한화장품학회지
• /
• 제40권3호
• /
• pp.307-311
• /
• 2014

2,3,5-Triphenyltetrazolium chloride (TTC)는 산화환원지시약으로 미생물의 증식에 의한 산소 소비를 쉽게 확인할 수 있다. 용해 후 무색의 형태를 띠고 있으나 생리활성이 있는 조직에서는 탈수소 효소(dehydrogenases)에 의해 환원되어 빨간색의 불용성 1,3,5,-triphenylformazan (TPF)가 된다. 본 연구에서는 병원성 미생물(Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Enterococcus faecium, Candida albicans)에 TTC 지시약을 활용하여 미생물 성장시험에 대해 확인하였다. 시험 균주에 TTC를 첨가하여 확인한 결과, 모두 탈수소효소 반응으로 인한 TPF 형성으로 붉은색 콜로니를 관찰하였다. 이후 TTC 0.04% 이상의 농도 및 12 h 이상 배양조건으로 최적화 실험 후 균주별 CFU 값을 통해 TPF 발현능을 확인하였다. 결국 TTC가 병원성 세균 및 효모균 성장에 큰 영향을 끼치지 않으며 배양 시 세균의 경우 12 h, 효모균의 경우 48 h 이후부터 확인이 가능하였다. 이러한 결과들로부터 TTC를 활용한 미생물 성장 확인 시험법이 더 신속 정확한 방법으로 화장품 연구에 활용 가능할 것으로 사료된다.

• 한국동물위생학회지
• /
• 제22권1호
• /
• pp.93-101
• /
• 1999

This test process on screening method for the detection of residual antibiotics in milk is simple, economic, sensitive to residual antibiotics and was given approval international organs. Thus, this study was carried out the comparison of Disk assay method and TTC-II method for sensitivity and minimum detectable range of antibiotics in raw milk. The results of this study was summarized as follows ; 1. The number of samples requested for treatment of mastitis was 198 samples. Comparison or analytical results among the methods of TTC-II, disk assay and Delve sp was that TTC-II 37 samples(18.6% ), Disk assay 125samples(63.1%), Delve SP 130 samples(65.7% ) reacted positively. Conformity rate of Delve SP and Disk assay was 70%. 2. Detectable limits of disk assay method in some antibiotics were more sensitive than those of official method(0.05-0.0025ppm in the $\beta$-lactams, 1ppm in two aminoglycoside, 0.2 ppm in one tetracycline, similar in one macrolide) 3. For sensitivity of residual sulfonamides TTC-II was much more sensitive than disk assay. Detectable limits of sulfamethazine and sulfadimethoxine were 30 to 50ppm levels. 4. The best medium preservation period is 1-2 days. 5. Concentration of brome cresol purple related to resistance for B stearothermophilus culture was 24ppm/ml. These results show that disk assay method for screening detection of antibiotics residuces in milk is worthy of use.

• Journal of Electrical Engineering and Technology
• /
• 제7권4호
• /
• pp.493-500
• /
• 2012

In this paper the performance of meta-heuristics algorithms such as GA (Genetic Algorithm), DE (Differential Evolution), PSO (Particle Swarm Optimization) and SA (Simulated Annealing) for the problem of TTC enhancement using FACTS devices are compared. In addition to that in the assessment procedure of TTC two novel techniques are proposed. First the optimization algorithm which is used for TTC enhancement is simultaneously used for assessment of TTC. Second the power flow is done using Broyden - Shamanski method with Sherman - Morrison formula (BSS). The proposed approach is tested on WSCC 9 bus, IEEE 118 bus test systems and the results are compared with the conventional Repeated Power Flow (RPF) using Newton Raphson (NR) method which indicates that the proposed method provides better TTC enhancement and computational efficacy than the conventional procedure.

• 대한환경공학회지
• /
• 제37권2호
• /
• pp.73-80
• /
• 2015

본 연구에서는 잔류의약물질로써 환경에서 노출 빈도가 높은 항생물질인 Tetracycline (TTC)을 대상으로 수용액 상에서의 망간산화물(birnessite)을 이용한 산화-변환 반응을 통한 제거와 용존성 자연유기물인 휴믹산(HA) 존재에 따른 영향을 조사하였다. TTC의 산화-변환 제거 특성 실험은 다양한 반응조건(반응시간, 망간산화물 주입량 및 pH 등)에서 회분식으로 조사하였으며, HA의 영향은 pH (3~9)와 HA농도 변화에 따라 조사하였다. 실험결과는 유사-일차 반응속도식을 적용하여 해석하였으며, 본 실험조건(TTC=0.25 mM, ${\delta}-MnO_2=1.0g/L$)에서의 TTC의 산화-변환 제거 반응속도상수(k, $hr^{-1}$)는 pH가 감소함에 따라 0.98 (pH 9)에서 2.97 (pH 3)로 일정하게 증가하였고, 망간산화물 주입량(1~2 g/L)이 2배 증가할 때 반응속도 상수는 약 1.3배 정도 증가하였다. HA (5 mg-C/L) 존재 시 망간산화물에 의한 TTC 변환제거는 $pH{\geq}6$에서 반응효율 상승을 나타냈으며, HA의 주입농도(1~10 mg-C/L, at pH 6)의 증가에 따라 일정하게 증가함을 확인하였다. 이상에서 얻은 연구결과는 기존 문헌에 제시된 TTC 반응기작과 비교 해석하였고, 망간산화물을 매개로 한 TTC의 산환-변환 제거 반응특성과 HA의 존재가 미치는 영향에 대하여 고찰하였다.