• Title/Summary/Keyword: 가해특성

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'생태와 특성을 파악하자' -월동산림해충의 방제대책-

  • 고제호
    • The Bimonthly Magazine for Agrochemicals and Plant Protection
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    • v.5 no.11
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    • pp.87-95
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    • 1984
  • 봄철부터 여름한철 산림에서 각종수목을 가해하며 늘어난 산림해충들은 가을을 맞아 기온이 낮아지면서 제 나름대로의 모습으로 깊은 겨울잠(동면)으로 들어간다. 우리나라의 산림은 지난 10여년 동안에 완전히 녹화되어 훌륭히 자라고 있으며 그동안 인공조림지(人工造林地)가 늘면서 한가지 수종으로 숲을 이루는 단순림(單純林)이 늘어남에 따라 과거에 큰 피해를 주었던 몇가지 살림해충의 피해가 적어지면서 이제까지 그리 피해가 많지 않았던 곤충이 해충화하는 경향이 있다.

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Insect Damage to Plants and Structure of Ecological Community: Indirect Interaction Mediated by Insect Damaged Plants (곤충의 가해와 생물군집 구조- 피해식물이 개재된 간접적 상호관계를 중심으로 -)

  • Hyun, Jai-sun
    • Korean journal of applied entomology
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    • v.54 no.2
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    • pp.137-144
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    • 2015
  • Plants can affect adversely the interaction among herbivores by inducing insect resistance chemicals and change of attack behavior of natural enemies. Also, plants may induce favorable effects to herbivores by production of allelochemicals, nutritional variation, or morphological changes. In this review, we examined the effects of the interaction among herbivores mediated by plants and plant-response induced by insect attack, or the life history strategies of insects on the community structure of herbivore insects, and discussed its ecological significance in community level.

The Effects of Driving Behavior Determinants on Dangerous Driving and Traffic Accidents in the Reckless Drivers Group: A Path Analysis Study (사고 및 음주운전자들의 운전행동결정요인 특성이 위험행동 및 교통사고에 미치는 영향: 경로분석 연구)

  • O, Ju-Seok;Lee, Sun-Cheol
    • Journal of Korean Society of Transportation
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    • v.25 no.2 s.95
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    • pp.95-105
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    • 2007
  • Speeding and drunken driving make drivers fail to detect hazards and cope with various driving situations. These behaviors also raise the possibility of being involved in traffic accidents and tend to increase the number of fatalities. The authors compared the driving behavior determinants of a rockless drivers group, consisting of individuals who have committed traffic accidents or offended regulations through drunken driving, with a normal drivers group. In the results, the reckless drivers group showed high scores of 'speeding' and 'drunken driving', and they also stated that they had more experiences of speeding, drunken driving and traffic accidents. In the path analysis study, it was found that the impacts of the rockless drivers group's 'risk sensitivity' and 'situational adaptability' on traffic accidents were stronger than those of normal drivers. This means 'risk sensitivity' and 'situational adaptability' can explain the origins of traffic accidents better in the reckless drivers group than accidents of the normal drivers group.

Studies on the Risk Class and Morphological Characteristics of Injured Microorganisms in Wooden Cultural Properties (목조문화재 가해 미생물의 형태학적 특성 및 가해위험도 연구)

  • Lee, Min-Young;Jeong, Seon-Hye;Kim, Eun-Song;Kim, Dae-Woon;Chung, Yong-Jae
    • 보존과학연구
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    • s.30
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    • pp.31-46
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    • 2009
  • In the study, we confirmed morphological traits and calculated the Risk Class of 25 mould species, including Tyromyces palustris, through decomposition rate of substrate for characteristic confirmation of injured microorganisms. We received the injured microorganisms in wood and it was pure cultivated. We observed growth traits and decomposition rate of substrate. Also, it allows the calculation of Risk Class to be worried in the case of growth in wooden cultural properties. As a result, Tyromyces palustris, representative of brown-rot, has the characteristics about decomposition rate of substrate - Cellulose ; more active(+++), Lignin ; more active(+++), Xylan ; more active(+++), Starch ; active(++). We classified Tyromcyes palustris as a first Risk Class and as a second Risk Class about Schizophyllum commune et al(9 species, See table 1. We look forward to offering standard data base for evaluating Risk Class as a matter of applying preventive conservation in wooden cultural properties through our study.

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First Report of Meloidogyne marylandi (Tylenchida : Heteroderidae) in Korea (한국미기록종인 잔디뿌리혹선충, Meloidogyne marylandi (참선충목 : 씨스트선충과)에 대한 보고)

  • 강상진;박병용;최동로;한상찬
    • The Korean Journal of Soil Zoology
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    • v.7 no.1_2
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    • pp.45-49
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    • 2002
  • Meloidogyne marylandi Jepson & Golden, 1987 is described from Zoysia grass collected in Cheonan, Korea. The nematode did not produce galls, and females were generally surrounded by a massive egg sac. Perineal patterns of female were a high to rounded arch with shoulders, wavy striae usually forming a rough. Vulva and anus were sunken. Second-stage juvenile body length was 390.3 $\mu\textrm{m}$ (290-430), tail length 55.1 $\mu\textrm{m}$ (49-59) and lateral field with 4 incisures. Male stylet length was 18.1 $\mu\textrm{m}$ (15-24), spicules length 26.2 $\mu\textrm{m}$ (23-29) and lateral field with 4-5 incisures.

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Comparative Effects of Gamma Irradiation and Methyl Bromide Fumigation on Disinfestation and Physicochemical Properties of Mung Bean (감마선과 Methyl Bromide 처리가 녹두의 살충 및 이화학적 특성에 미치는 영향)

  • 노미정;권중호;권용정;허은엽;권용순;변명우
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.30 no.3
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    • pp.444-449
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    • 2001
  • Comparative effects of gamma irradiation and methyl bromide (MeBr) fumigation on disinfestation and physicochemical attributes of mung bean were investigated. Insects in domestic mung bean were identified to be Collosobruchus chinensis Linne. Ina disinfestation test, MeBr showed 100% disinfestation effect on Larva and adult at 5th day after treatments, while irradiation dose above 3 kGy was effective for disinfesting all larva at that time. Adults were more sensitive to radiation than larva. Around 1 kGy was enough to control larva and adult in mung bean following 10 to 15 days of irradiation. In physicochemical properties of treated sampels, nitrogen solubility, TBA value, amino acid and fatty acid compositions were not different among the control, 2.5 kGy-irradiated and MeBr-fumigated samples. MeBr fumigation caused the decrease in lightness (Hunter's L value) and the increase in redness (a value) and yellowness (b value), thereby resulting in overall color difference (${\Delta}E$) in a noticeable level (NBS 2.61~2.94).

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부산항 항로표지 영상감시시스템 구축 사례

  • An, Hyeon-Gyu;Lee, Tae-Gyeong
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2017.11a
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    • pp.151-153
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    • 2017
  • 해상 특성으로 야간에 항로표지 충돌사고가 빈번하게 발생함에 따라 야간에도 주간처럼 사물 식별이 가능한 영상정보를 확인할 수 있는 고성능 촬영장비 도입하고 부산항 주요항로에 운영되고 있는 항로표지시설의 주 야간 상태 정보를 감시하여 항로표지 고시기능 유지 여부를 확인하고 선박 충돌에 의한 등부표 사고 발생시 가해선박을 색출하여 원인자에게 피해시설을 복구토록 함.

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Study on Metal Plate Connections and Plywood Gusset Plate Connections for Light-Frame Wood Truss Tension Joint (목재 트러스 접합부의 toothed metal plate 접합과 plywood gusset plate 접합에 관한 연구)

  • Cha, Jae-Kyung
    • Journal of the Korean Wood Science and Technology
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    • v.20 no.1
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    • pp.46-50
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    • 1992
  • 본 연구는 잣나무 간벌재를 이용한 plywood gusset plate 접합과 toothed metal plate 접합에 대하여 인장력을 가해 조사하였다. plywood gusset plate 접합에 있어서는 합판과 부재 사이를 상온 경화제(초산 비닐 수지)로 접착한 후 6d 못으로 접합한 형태와 단지 합판만을 사용한 형태의 plywood gusset plate 접합 사이의 기계적 특성 차이를 조사했다. toothed metal plate 접합은 plywood gusset plate 접합보다 인장력에서 좋은 behavior를 보였다. 또한 접착제를 가한 plywood gusset plate 접합은 접합제를 가하지 않은 형태보다 큰 하중 지지력을 보였다.

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