단감나무 둥근갈색 무늬병균 Pestalotiopsis spp.의 isozyme을 통한 유전다양성 분석

임태헌,김경수,김명조,이윤수,심재욱,장태현,우수진,최혜선,강원희 한국식물병리학회 1998 Plant Pathology Journal Vol.14 No.5

난청 환자에서 청성뇌간반응검사와 순음청력검사 간 주파수별 역치 차이 분석

임태헌,김종양,오주형,주준범,조주은,박보나 대한이비인후과학회 2023 대한이비인후과학회지 두경부외과학 Vol.66 No.1

Background and Objectives There is no clear standard for the difference in the thresholdsof auditory brainstem response (ABR) and pure tone audiometry (PTA) when using ABR toevaluate the reliability of PTA. Therefore, we assessed the difference in the thresholds of ABRand PTA for each frequency. Consequently, we present here the actual difference values betweenthe two tests that can be used as a reference in the clinic. Subjects and Method We retrospectively assessed the audiometry results of 129 ears. Earsin which the hearing thresholds of each frequency continuously declined were classified as thedownward group. We compared the average of differences between the two tests by frequency. The differences were compared for each hearing level from 50 dB or higher. Results For all ears, the appropriate range of difference value was ±5 dB at 2 kHz. At 1 kHz,the ABR threshold was 10 dB higher than PTA, and it was 10 dB less than PTA at 4 kHz. Inthe downward group, the difference value increased by 10 dB at 1 kHz and 4 kHz. In the subgroupsat each hearing level, the difference value showed similar results (p<0.05). Conclusion The difference in the threshold, regardless of the severity or tendency of hearingloss, was the smallest at 2 kHz and the range was ±5 dB. ABR was 10 dB higher at 1 kHz andand 10 dB lower at 4 kHz than PTA. In the downward group, the difference at 1 kHz and 4kHz increased by 10 dB each.

로봇 매니퓰레이터의 LQG 시각 서보제어

임태헌,전향식,최영규,김성신 제어로봇시스템학회 1999 제어로봇시스템학회 국내학술대회 논문집 Vol.1 No.10

복숭아 미이라과로부터 분리한 방선균의 항균 활성 및 동정

임태헌,이정목,장태현,차병진 한국산업미생물학회 2000 한국미생물·생명공학회지 Vol.28 No.3

Monilinia fructicola에 의해 감염되어 미이라화된 복숭아 열매로부터 Monilinia fructicola에 강한 항진균성 물질, chitinase 및 urease을 분비하는 방선균을 분리하였다. 선발된 TH-04 균주는 배양적·형태적 특성, 세포벽 성분 및 세포내 당 성분을 분석한 결과, 전형적인 Streptomyces속에 속하는 방선균으로 동정되었다. TH_04 균주는 Monilinia fructicola, Colletotrichum gloeosporioides, Magnaporthe grisea, Rhizoctonia solani, Phytophthora capsici, Alternaria kikuchiana, Fusarium solani 및 Fusarium oxysporum 등 8종의 식물병원균에 대하여 항진균 활성을 나타냈다. 항생물질 생산을 위한 배양조건은 온도 20℃, pH 7 및 배양기간 7일로 확인되었다. An actinomycetes strain which produced chitinase, urease, and antifungal substances to Monilinia fructicola was isolated from peaches mummified by Monilinia fructicola. The strain TH-04 was identified as Streptomyces sp. based on cultural and morphological characteristics, cell wall diaminopimelic acid, and sugar patterns of whole-cell extracts. Streptomyces sp. TH-04 showed antifungal activity to several fungi including Monilinia fructicola, Colletotrichum gloeosporioides, Magnaporthe grisea, Rhizoctonia solani, Phytophthora capsici, Alternaria kikuchiana, Fusarium solani, and Fusarium oxysporum. The optimum cultural conditions for the production of antifungal substances were 20℃, pH 7, and 7 days.

난청 환자에서 어음명료도 반복 검사 시의 편차 분석

임태헌,오주형,황준호,주준범,조주은,김종양 대한이비인후과학회 2022 대한이비인후과학회지 두경부외과학 Vol.65 No.1

Background and Objectives The diagnosis of hearing impairment is based on repeatedaudiometry, including pure tone audiometry (PTA), speech reception threshold test (SRT), andspeech discrimination test (SDT). SDT results particularly show a wide discrepancy upon repeatedtesting, while malingering is suspected when having more than 12% difference between3 individual SDT results. Therefore, in this study, we compared the proportion of malingeringfound in repeated SDT with that found in other audiometric tests and analyzed the characteristicsof malingering group in order to reevaluate the current criteria of defining malingering. Subjects and Method We retrospectively assessed the audiometry results of 113 patients(226 ears) with hearing impairment. Each ear was divided into a malingering group and a truehearing loss group. The proportion of ears corresponding to each malingering criterion wascompared using a chi-square test. An independent sample t-test was performed to identify thedifferences between the characteristics between the two groups. Results The number of ears that met the malingering criteria were 19 (8.41%) in PTA, 15(6.64%) in SRT, and 75 (33.19%) in SDT. There was a significant difference in the proportionof malingering between the 3 hearing test modalities (p<0.001). There was no significant differencein auditory brainstem response, mean age and sex distribution between the malingeringgroup and the true hearing loss group. Conclusion When conducting repeated SDT, there is a risk of misdiagnosing an actualhearing loss patient as a malingering patient under the current malingering criteria. Therefore,the current criteria on SDT requires reevaluation.

일반국도의 소형트럭 과적 분포에 관한 연구

임태헌,이상수,박장호 한국ITS학회 2022 한국ITS학회논문지 Vol.21 No.4

In this study, data on traffic volume and weight of small trucks were collected from three National Highways to identify the overload status of small trucks excluded from domestic overloaded vehicle enforcement. These data were classified according to the vehicle type, day of the week, and time of day to analyze the overload distributions by the vehicle total weight. From the analysis results by vehicle type, on average, the overload ratios for trucks of 1.5 tons or less, 2.5 tons or less, 3.5 tons or less were 6.2%, 31.7%, and 13.7%, respectively. In addition, for the same vehicle model, there was a difference by collection point, and the smaller the total weight of the small truck, the higher the overload ratio. From the results according to the day of the week, there was no tendency for the overload ratio to appear high on a specific day, but there was a predictable occurrence pattern at each site. In addition, from the results by the time of day, the overload ratio was the highest on average after lunch (13:00–15:59) at all sites. 본 연구에서는 국내 과적차량 단속 대상에서 제외된 소형트럭에 대한 과적 운행 여부를 파악하기 위하여 국도 3개 지점에서 소형트럭의 교통량과 중량 자료를 수집하였다. 그리고 이를차종별, 요일별, 시간대별로 구분하여 차량 총중량별 과적 분포를 분석하였다. 차종별 분석 결과, 평균적으로 1.5톤 이하 트럭은 6.2%, 2.5톤 이하 트럭은 31.7%, 그리고3.5톤 이하 트럭은 13.7%의 과적비율로 나타났다. 그리고 동일한 차종에 대하여 수집 지점별로차이가 나타났고, 소형트럭의 총중량 무게가 적을수록 과적 비율이 높게 나타났다. 요일별 분석 결과, 특정요일에 과적비율이 높게 나타나는 경향은 없었으나 각 지점별로 요일별 예측 가능한 발생 패턴이 있는 것으로 보였다. 그리고 시간대별 분석 결과 모든 지점에서 점심시간이후 시간(13:00~15:59)대에 과적차량의 비율이 평균적으로 가장 높은 것으로 파악되었다.

포도 수출단지 과원과 수출포도의 병 발생현황

임태헌,이석준,이채민,송진선,한상섭,이동운 경상대학교 농업생명과학연구원 2017 농업생명과학연구 Vol.51 No.2

From 2010 to 2012, this study conducted to survey occurrence of quarantine diseases occurrence on cultivation, harvest period of grapevine, and sorting places for export grapevine in export complex areas(domestic vs. export; Hwaseong in Gyeonggii, Sangju and Yeongcheon in Kyeongbuk, Namwon in Jeonbuk and Yeongdong in Chungbuk). Diagnosed diseases in this study were gray mold by Botrytis cinerea, blact rot by Botryosphaeria dothidea, anthracnose by Colletotrichum gloeosporioides, bird,s eye rot by Elsinoe ampelina, Phomopsis cane by Phomopsis viticola, downy mildew by Plasmopara viticol, leaf blight by Pseudocercospora vitis, and powdery mildew by Uncinula necator. The leaf blight disease incidence and severity showed the highest infection rate in all surveyed fields. Occurrence rate of investigated all diseases was different depending on individual farmer and occurrence rate of disease was lower in export farms than that of domestic sale farms. Disease infested grapes were eliminated during selection process and ratio of removed the infection fruit is relatively well-performed in export facilities than domestic packing facilities.

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.

Ag촉매를 이용한 NOx의 탄화수소 선택적촉매환원 반응 특성

임태헌,현영진,목영선 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

발전소, 디젤엔진, 소각에서 발생하는 NOx, HC, PM, SOx, CO, CO₂, 분진 등 대기오염 물질로 이루어진 배기가스가 배출되고 있고 그 중 NOx는 광학스모그, 오존, 산성비를 유발시킨다. 따라서 전세계적으로 대기오염에 관심이 증가되면서 NOx의 규제도 강화되는 추세이다. 본 연구는 NOx를 제거 하기 위해 선택적촉매 환원법을 이용 하였다. 촉매로는 Ag/r-Al₂O₃으로 선정하였으며, 입자 크기(20, 50, 80 nm) 에 따른 물리적 특성을 조사 하였으며, 환원제의 비율에 따른 NOx 제거율을 알아보았다. 환원제는 안전성, 촉매의 수명에 있어서 유리한 Alkane께 탄화수소 n-heptane을 사용 하였으며 산소 10% 조건에서 실험을 수행하였다. 촉매 전체적으로 300~400℃에서 NOx제거율이 90% 이상이며, 촉매의 크기가 작을수록 250℃에서 제거율이 높은 것을 확인 할 수 있었다. BET, FE-SEM를 이용하여 촉매의 표면특성을 조사 하였으며, H₂-TPR 실험을 통해 촉매의 환원특성을 조사하였다.

금속 촉매의 형태에 의한 질소산화물 HC-SCR 특성

임태헌,목영선,현영진 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

질소산화물(NOx)은 대기오염원 중 하나로서 광학스모그, 산성비로 인한 토양의 pH저하의 원인이다. 그렇기 때문에 전세계적으로 질소산화물 배출에 관한 환경법규는 강화되고 있다. 선행 연구에 의하면 질소산화물의 배출을 저감하기 위해 선택적 촉매환원법을 이용하였으며, 암모니아를 환원제로 사용 할 경우, 미 반응한 암모니아가 설비를 부식시켜 장비수명을 단축하는 단점이 있지만, 알칸족 탄화수소를 사용 할 경우 이런 문제를 해결 할 수 있으며, 안전성 촉매의 수명에 있어서 유리하다. 본 연구에서는 Ag, Cu, RuO₂ 촉매를 선정하였으며 r-Al₂O₃를 지지체로 사용하였다. 환원제로는 알칸족 n-heptane를 이용하였으며, 반응 온도조건은 200~500°C로 50°C간격으로 측정하였다. 금속 촉매의 형태에 의한 NOx제거율은 Ag, RuO₂는 입자형태의 촉매가 좋았으며, Cu 경우 선형형태에 촉매가 입자형태 촉매보다 NOx제거율이 높은 것을 확인 할 수 있었다. 촉매의 활성을 알아보기 위해 TPR 분석을 하였으며, BET, FE-SEM를 이용하여 촉매의 물리화학적 표면특성을 조사하였다.