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제주 옥수수에서 열대거세미나방 비래 세대 및 후세대의 피해양상 특성
허진우,김수빈,김동순 한국응용곤충학회 2021 한국응용곤충학회지 Vol.60 No.2
열대거세미나방(Spodoptera fruligiperda)은 열대성 비래해충으로서 우리나라에서도 최근 비래하여 피해가 발견되고 있다. 본 연구는 열대 거세미나방 비래 세대와 후세대의 옥수수에 대한 피해양상을 파악하고자 수행하였다. 옥수수 품종별 열대거세미나방 비래 세대에 의한 피해주율은 적게는 4.3% (알록이옥수수)에서 많게는 33.0% (초당옥수수)로 다양하였으며, 전체 평균 피해주율은 13.2% 이었다. 열대거세미나방에 피해 를 받은 옥수수 중에서 최종 번데기까지 이르는 데에 성공한 주의 비율은 19.3% 이었다. 비래 후세대가 암이삭에 미치는 피해는 비래세대에서 거의 무시할 수준으로 확인된 것과는 달리 높게 나타났으며, 종자까지 피해받은 암이삭의 비율은 60%가 되었다. 유충의 분산은 2령기에 가장 활발하였으며, 한 이랑을 따라서 일렬로 일어났다. 기타 열대거세미나방의 피해발달과 본결과의 활용방안에 대하여 고찰하였다. The fall armyworm (FAW), Spodoptera frugiperda (Smith), is a notorious invasive migratory pest native to the tropics that has recently invaded South Korea with subsequent damage to cornfields. This study was conducted to evaluate the damage patterns on corn plants caused by the migratory and subsequent generations of FAW. The early migrant generation-related infestation rates reached an average of 13.2%, ranging from a minimum of 4.3% (‘Allog-i’) to a maximum of 33.0% (‘Chodang’), depending on the corn cultivar. The proportion of FAW larvae-infested corn plants, in which the FAW survived until the pupal stage was 19.3%. The subsequent FAW generation caused considerable damage to the ears, resulting in 60% of ears with damaged kernels. This damage was markedly different from the nearly negligible damage caused by the migratory generation. The FAW larval dispersion was the most dynamic during the second instar stage and occurred along the same cornrow in line. In addition, we discuss the development of corn pant damage patterns caused by FAW. In summary, the results of the present study would provide useful basic information for the damage analysis of this pest for future studies.
고출력용 산업안전 보조전원의 Supercapacitor
허진우,강안수 대한안전경영과학회 2003 대한안전경영과학회 학술대회논문집 Vol.2003 No.11
In the electrode fabrication of unit cell, it was ascertained that electrochemical characteristics were greatly increased with 90 wt.% of BP-20, 5 wt.% of Super P and 5 wt.% of mixed binder [P(VdF-co-HFP) : PVP =7 : 3] The self-discharge of unit cell showed that diffusion process was controlled by the ion concentration difference of initial electrolyte due to the characteristics of Electric Double Layer Capacitor (EDLC) charged by ion adsorption in the beginning, but this by current leakage through the double-layer at the electrode/electrolyte interface had a minor effect and voltages of curves were remained constant regardless of electrode material. The electrochemical characteristics of 2.3 V/3,000 F grade EDLC were as follows: 0.35 m of DC-ESR (100 A discharge), 0.14 mof AC-ESR (AC amplitude 100 mV), 2.80 Wh/kg (3.73 Wh/L) of energy density and 4.64 kW /kg (6.19 kW/L) of power density. Power output was compatible with electric vehicle applications, uninterrupted power supply and engine starter, in due consideration of Ragone relations.
유즙 호르몬 과분비 선종에 대한 감마 나이프 수술의 역할
허진우,임영진,임언,양재영,고준석,김태성,이봉암,김국기,Hur, Jin Woo,Lim, Young Jin,Leem, Won,Yang, Jae Young,Koh, Jun Seok,Kim, Tae Sung,Rhee, Bong Arm,Kim, Gook Ki 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.3
Objective : The treatment for prolactin secreting pituitary adenoma(prolactinoma) include pharmacology, surgery, radiation therapy or radiosurgery. The recent development of radiological imaging and microsurgery has made transsphenoidal microsurgery the treatment of choice for most prolactin secreting pituitary adenoma. Despite its low morbidity and mortality, relatively high recurrence and failure rate have been reported. Recent advances in neuroimaging provide a precise targeting in radiosurgery for treatment of prolactin secreting pituitary adenoma. In this regard, Gamma knife radiosurgery has been proposed as an alternative primary treatment modality or adjuvant therapy. Patients and Methods : Twenty three patients with prolactin secreting pituitary adenoma have been treated with Gamma knife radiosurgery in our institute from March 1992 to September 1998. We analyzed clinical, radiological and endocrinological changes in 21 patients who were followed up for an average of 35.7 months. Results : The mean age was 34.9 years and 16 patients were treated with Gamma knife radiosurgery as primary treatment and 5 patients underwent Gamma knife radiosurgery for residual tumors after microsurgery. The margin of the tumor was incorporated within the 40 to 80% and the mean marginal dose was 24.5 Gy. Clinical improvement in the last follow-up were present in 17 cases(81.0%) and 3 of 5 infertility patients became pregnant after Gamma knife radiosurgery. Tumor control rate after Gamma knife radiosurgery was 100%. Endocrinological normalization in the last follow-up were obtained in 12 cases(57.1%). In three cases, hormonal normalizations were present in early period(3-32 months) but serum hormone levels were elevated subsequently. Conclusion : We conclude that the Gamma knife radiosurgery for prolactin secreting pituitary adenoma seems to be safe and effective as adjuvant therapy after microsurgery and primary treatment modality in selective patients.
허진우,전환진,안치원 한국물리학회 2017 Current Applied Physics Vol.17 No.11
The development of practical flexible transparent electrodes is one of the major core technology fields for future nanoscale optoelectronics. Despite the many efforts to replace the indium tin oxide (ITO) electrode, preparing practical alternatives that satisfy the essential requirements of flexible transparent electrodes remains a challenge. In this work, core-shell-structured carbon/metal hybrid mesh (CSCMHM) films, comprised of a metal layer coated onto conductive carbon nanofiber network structures, were fabricated using electrospinning and electroplating and demonstrated potential for use as flexible transparent electrodes. In contrast to previously described techniques that use conventional polymer fibers as sacrificial structures, the conductive carbon nanofibers used in the current technique that we developed provided bi-functionality: they formed conductive core channels and artificial supports of the metal structures. The CS-CMHM films displayed superior optoelectrical, mechanical, and thermal properties: they transmitted ~91% of visible light, showed a low sheet resistance of ~2.7 U/sq, and displayed excellent mechanical stability even after 10000 cycles of bending the films to a radius of 5 mm; also, applying a voltage of only 3 V to a transparent heater based on CS-CMHM films resulted in the temperature of the film surface increasing very rapidly in the first 20 s, and soon thereafter reaching ~280 C. Based on these results, we believe that the use of CS-CMHM films and the process we developed to fabricate them open up great opportunities for high-performance flexible transparent electronics.