Characteristics of THz Pulse Propagation on Teflon Covered Two-Wire Lines

조정상,전태인 한국광학회 2015 Current Optics and Photonics Vol.19 No.6

We report efficient direct coupling of THz dipole antenna pulses onto air spaced two-wire transmissionlines and Teflon covered two-wire lines. The air spaced two-wire lines show TEM mode propagation withvery small group velocity dispersion (GVD) and relatively low attenuation. The Teflon covered two-wirelines showed comparatively much higher attenuation and GVD. However, the Teflon covered two-wirelines show a very good guiding property when the lines are curved. Although the lines are circled only5.0 cm in diameter, there is no additional attenuation compared to straight the lines

초음파탐상시험의 최신응용

조정상 대한용접접합학회 1994 대한용접·접합학회지 Vol.12 No.4

컴퓨터의 발달과 아울러 High Technology분야에서 급속도로 발전되어 FULL DIGITAL 초음 탐상기도 제 3세대의 NoteBook타입 초음파 탐상기가 선보인 것이다. 휴대하기 간편하며, 다양한 기능을 갖추었으면서도 사용하기 아주 쉽게 된 것이 특징이다. 산업의 고도화 성장과 급속한 발전으로 인하여 다양한 재질, 다양한 형태, 다양한 적용범위가 폭 넓어지고 있기 때문에 여기에 가장 알맞는 기능을 가진 초음파 두께기의 탐상기를 고려하지 않으면 외화낭비, 시간낭비, 그 밖에 여러 가지 낭비가 되게된다. 따라서 이제부터 초음파 두께기분야와 초음파 탐상기분야에서 어떻게 변천되어왔고, 어떻게 산업에 응용할 수 있는지를 살펴보자.

접착제,도료,잉크; 2P-432 점도 측정을 통한 자성입자 콜로이드 분산액의 분산성 평가

조정상,구상균 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.0

Effects of Streptomyces griseofuscus 200401 on Melon Powdery Mildew inGreenhouse

임태헌,조정상,강상재,Iruthayasamy Johnson,차병진,최용화 한국식물병리학회 2008 Plant Pathology Journal Vol.24 No.1

The fermentation broth (FB) of Streptomyces griseofuscus 200401 isolated from non-farming soil showed antagonistic activity against powdery mildew fungus both in melon leaf/seedling assay and in field trials. The FB of S. griseofuscus 200401 was tested at different concentrations. In primary test, the control value of 2- fold diluted FB of S. griseofuscus 200401, compared to control, reached to 82.8%. The protective activity recorded 80.5% in 2-fold dilution of FB. The effect was reduced to 28.9% in high dilution (100-fold) treatment. The curative effect was relatively lower than protective activity. In field test, the antifungal activities of S. griseofuscus 200401 remained low in blocks sprayed with 100-fold diluted FB and the control values were 15.2 and 15.9% in 2005 and 2006, respectively. However, the activities were as high as 65% and 67.3% in the blocks treated with 2-fold dilution of FB during the same period.

고추 역병에 대한 아인산(phosphorous acid) 의 방제 효과

이용세,장태현,임태헌,류연주,조정상 한국환경농학회 2001 한국환경농학회지 Vol.20 No.3

아인산 (phosphorous acid, H₃PO₃) 고추역병균 (Phytophthora capsici)에 대한 생물활성을 in vitro와 in vivo에서 검정하였다. 아인산이 1,000 및 10,000 ㎍ a.i./mL 농도로 첨가되었을 경우 액체배지와 고체배지에서 무처리구에 비하여 97%이상 균사 생장이 억제되었으나. 10 ㎍ a.i./mL 농도의 경우 액체배지에서는 무처리구에 비하여 46.2%, 고체배지에서는 4.9% 생장이 억제되었다. 액체배지에서 균사생장에 대한 EC_(50)은 12.0 ㎍ a.i./mL 였다. 아인산의 100 ㎍ a.i./mL 농도에서 유주자낭의 형성은 무처리구에 비하여 89.1% 억제되었다. 아인산이 10,000 및 1,000 ㎍ a.i./mL 농도로 첨가되었을 경우에 고추역병균의 유주자낭 발아율은 각각 0% 및 15.3% 발아하여 97.3% 발아한 무처리구에 비하여 100%와 84.3% 발아가 억제되었으며, 100 ㎍ a.i./mL 농도에서는 54.3%가 발아하여 44.2% 발아가 억제되었다. 10 ㎍ a.i./mL 농도에서는 90.9% 발아하여 6.6% 발아가 억제되었으나, 유주자낭은 발아하여도 정상적인 발아관의 신장에 이은 균사생장이 이루어지지 않고 균사신장이 극히 저조하거나, 비정상적인 형태를 나타내었다. 온실에서 아인산제제의 고추역병발생억제 효과를 검정한 결과 아인산제제는 77.0∼62.0%의 방제가를 보였다. 고추를 포장에서 관행 재배하면서 아인산제제의 효과를 검정한 결과 무처리구와 비교하였을때 54% 역병발생이 억제되어 아인산의 병발생억제효과가 있는 것으로 나타났다. 아인산이 고추 생육에 미치는 영향을 조사한 결과 무처리구에 비해 초장은 108.5%, 한 주당 고추 열매 수는 123.8% 무게는 119.7% 생육이 증진되었다. Control effects of phosphorous acid were investigated on Phytophthora blight of red pepper plants in greenhouse and field. In vitro test, the mycelial growth of Phytophthora capsici was inhibited by the phosphorous acid more than 97% at 1,000 ㎍ and 10,000 ㎍ a.i./mL in the liquid and solid culture, respectively. At concentration of 10 ㎍ a.i./mL of phosphorous acid, in the liquid culture the mycelial growth of P. capsici was inhibited 46.2%, however inhibited only 4.9% on the soild culture. Zoosporangial formation was also inhibited 89.1% by phosphorous acid at 100 ㎍ a.i./mL. Phosphorous acid affected more zoosporangial formation of P. capsici than its mycelial growth. At the concentrations of 10,000, 1,000 and 100 ㎍ a.i./mL of phosphorous acid, germination of zoosporangia was inhibited 100, 84.3 and 44.2%, respectively. Mycelial growth and zoosporangial formation of P. capsici were little affected at the concentration of 10 ㎍ a.i./mL of phosphorous acid. Cermination of zoosporangia was also little affected at this concentration, however growth of the germ tubes was inhibited and the abnormal mycelial growth was observed. Phosphorous acid suppressed the incidence of Phytophthora blight of red pepper plants up to 77.0∼62.0%, in greenhouse. Phosphorous acid suppressed the incidence of Phytophthora blight of red pepper plants up to 54.0% at the conventional culture in field. Treatments of phosphorous acid increased up to 113% in height, 135% in number of fruit, and 129% in weight of fruit.

The protective efficacy of the enterotoxigenic Escherichia coli vaccine candidate by GI24 against neonatal piglet colibacillosis

최영환,문자영,서병주,김원경,조정상,최민수,임재삼,김성복,김원일,허진 한국동물위생학회 2017 韓國家畜衛生學會誌 Vol.40 No.4

Enterotoxigenic Escherichia coli (ETEC) strains producing each F4, F5, F6 and F41 fimbriae were lysed by GI24 peptide. The lysate cells were used as ETEC vaccine candidate. This study was carried out to examine whether intramuscular (im) immunization of pregnant sows with the novel vaccine candidate could effectively protect their neonatal piglets against ETEC colibacillosis. All pregnant sows were primed at 11 weeks and were boosted at 14 weeks of pregnancy. Group A sows were im inoculated with PBS. Group B sows were im immunized with 2×109 the mixture. Seral IgG, colostral IgA and IgG titers from group B sows, and seral IgG and IgA levels in group B piglets were significantly higher than those of group A sows and piglets, respectively. After challenge with wild-type ETEC, diarrhea and mortality was not observed in group B piglets. However, diarrhea was observed in 66.7% of group A piglets, and 33.3% mortality was observed. These findings indicate that im immunization of sows with the mixture of the novel vaccine candidate can effectively protect their offspring from ETEC colibacillosis.

Multi-channel-contained few-layered MoSe2 nanosheet/N-doped carbon hybrid nanofibers prepared using diethylenetriamine as anodes for high-performance sodium-ion batteries

정선영,Subrata Ghosh,김재광,강동원,정상문,강윤찬,조정상 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.75 No.-

A facile new strategy for the synthesis of multi-channel-contained N-doped carbon nanofibers composedof few-layered MoSe2 nanosheets (denoted as MC-NCNF/MoSe2) was introduced and the composite wasdemonstrated as an anode material for sodium-ion batteries. This was thefirst time that diethylenetri-amine was introduced as a pore generator in the electrospinning process and played a key role ingenerating multi-channels in the structure by phase-separation from the molybdenum salt andsubsequent volatilization without any additional process. Polyvinylpyrrolidone was used as a carbonprecursor and played the role of a N-doping source for the carbon matrix. MC-NCNF/MoSe2 achieved ahigh reversible discharge capacity of 386 mA h g 1 at a current density of 0.5 A g 1 after the 300th cycleand superior rate capability of 285 mA h g-1 at 10.0 A g 1. The multi-channeled structure of MC-NCNF/MoSe2 facilitated effective Na+ and electron diffusion during repeated discharge/charge processes andaccommodated the huge volume expansion of the MoSe2 nanosheets induced by electrochemicalreaction of the Na+ ion.

인수공통전염병에서의 브루셀라병

문자영 ( Ja Young Moon ),김원경 ( Won Kyong Kim ),조정상 ( Jeong Sang Cho ),최민수 ( Min Su Choi ),최영환 ( Yeong Hwan Choi ),허진 ( Jin Hur ) 한국식품위생안전성학회 2017 Safe Food Vol.12 No.1

Designing metal oxide-vertical graphene nanosheets structures for 2.6 V aqueous asymmetric electrochemical capacitor

Subrata Ghosh,S.R. Polaki,Gopinath Sahoo,En Mei Jin,M. Kamruddin,조정상,정상문 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-

The asymmetric electrochemical capacitor was realized by MnO2/Vertical graphene nanosheets (VGN)and Fe2O3/VGN as positive and negative electrodes, respectively. The surface of VGN skeleton isindependently decorated with MnO2 having sponge gourd-like morphology and Fe2O3 having nanoricelike morphology. Both the electrodes have shown around 250 times higher charge-storage capacity thanthe bare VGN (0.47 mF/cm2) with the specific capacitance of 118 (MnO2/VGN) and 151 mF/cm2 (Fe2O3/VGN). The fabricated asymmetric device exhibited a specific capacitance of 76 mF/cm2 and energydensity of 71 mWh/cm2 with an excellent electrochemical stability up to 12,000 cycles, over a potentialwindow of 2.6 V.