• Title/Summary/Keyword: 동포자

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Effects of nutrient Source, Temperature, pH, and Light on Sporidial Production of Ustilago maydis and It Viability for Long-term Storage (Ustilago maydis의 소생자 형성에 미치는 영양원, 온도, 광의 효과 및 자기보존 후의 생존력)

  • 박경석;김충회
    • Korean Journal Plant Pathology
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    • v.12 no.2
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    • pp.142-146
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    • 1996
  • 옥수수 깜부기병균 Ustilago maydis 동포자를 풍건한 후 모래나 silica gel을 보존매체로 해서 4$^{\circ}C$나 그 이하 온도에서 24개월 두었을 때 동포자 생존율은 40~45%였다. 동포자는 28$^{\circ}C$ PDA상에서 쉽게 발아하여 많은 소생자를 형성하였다. U. maydis 동포자로부터 소생자 형성의 최적배지는 corn meal broth였고, carrot broth와 potato-dextrose broth의 순으로 좋았다. 소생자 형성에 가장 적합한 조건은 온도 28~3$0^{\circ}C$, pH5~7이었다. 소생자 형성은 암조건에서 보다 좋았다.

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Smut Induction on Corn Seedlings by Indoculation of Sporidia and Teliospores of Ustilago maydis in Greenhouse Conditions (온실조건에서 Ustilago maydis의 소생자 및 동포자 접종에 의한 옥수수 유묘의깜부기병 발병유도)

  • 김충회;이현주
    • Korean Journal Plant Pathology
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    • v.12 no.3
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    • pp.291-296
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    • 1996
  • 옥수수 유묘접종시 깜부기병이 가장 잘 발병하는 조건은 4엽기 옥수수묘를 10\ulcorner~10\ulcorner/ml 농도의 소생자 현탁액으로 경엽살포한 후 28~3$0^{\circ}C$의 습실상에서 24시간 둔 후 꺼내어 온실에 두었을 때였다. 유묘의 엽기가 이보다 어리거나 접종원 농도가 이보다 높을 때, 혹은 습실상내 처리기간이 길어지면 접종후 유묘의 이른 고사를 초래하였다. 또한 습실상의 온도가 낮아질수록 깜부기병의 발병정도도 감소하였다. 깜부기병의 발생은 소생자 현탁액의 경엽살포 및 줄기주사접종에 의해서는 가능하였지만 토양관주에 의해서는 발병하지 않았다. 소생자 현탁액은 별도의 영양원의 첨가 없이도 발병을 잘 유도하였다. 동포자 현탁액을 직접 경엽살포하거나 줄기주사접종하여도 발병하였으나 소생자 현탁액접종에 비하여 발병정도가 현저히 낮았다.

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Occurrence of White Rust and Growth of Chrysanthemum 'Baekma' under Various Relative Humidity and Temperature Conditions in the Greenhouse (시설 내 상대습도 및 온도 조건에 따른 국화 '백마'의 생육과 흰녹병 발생)

  • Yoo, Yong Kweon;Roh, Yong Seung
    • Horticultural Science & Technology
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    • v.32 no.6
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    • pp.803-811
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    • 2014
  • This study was carried out to investigate the effect of relative humidity (70, 80, 90, and 95%) and to examine the interrelationship of temperature (15, 20, and $25^{\circ}C$) and relative humidity (60, 70, 80, and 90%) in the greenhouse on growth and occurrence of white rust in chrysanthemum 'Baekma'. The developmental stages of white rust were monitored from the initial occurrence to sporidium formation in teliospores. When the relative humidity of greenhouse was adjusted to 90% or more for 40 days, the occurrence rate of white rust, the number of infected leaves, and the number of symptoms per leaf were more than 97%, 10, and 55, respectively. However, in the treatment with 70% relative humidity, the occurrence rate of white rust dropped to 30% and only two spots of symptoms were observed with only 1 or 2 infected leaves per plant. The growth of cut flowers, such as fresh weight and leaf number, was the highest in 70% relative humidity. In the 90% relative humidity treatment, the first symptom of white spot appeared at 6 days after planting in chrysanthemum infected with white rust (stage 1), and then after one day, teliospores came out through the epidermal tissue of leaf (stage 2). The telium was formed with increasing teliospores after 1 to 2 days (stage 3), and then the promycelia developed from teliospores (stage 4). After a lapse of 4 to 5 days, sporidia formed on promycelia (stage 5). Regardless of relative humidity, white rust did not occur at all in treatments at $25^{\circ}C$. In treatments at $20^{\circ}C$, the number of sporidia was high regardless of relative humidity, but white rust did not occur in 60% and 70% relative humidity. As the relative humidity was higher, the number of sporidia and occurrence rate of white rust greatly increased, but the occurrence rate of white rust decreased to less than 14% in 60% and 70% relative humidity in treatment at $15^{\circ}C$.

A Study on Variation of Chinese-Korean's Recognition to the Local Community in their Enclave (중국동포(Chinese-Korean) 집단적 거주지에 나타난 지역사회에 대한 중국동포의 인식변화에 관한 연구)

  • Kim, Young-Ro
    • Korean Journal of Social Welfare
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    • v.63 no.3
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    • pp.133-156
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    • 2011
  • This study used the qualitative research for deeply interviewing Chinese-Koreans who live and work in Dearim-dong area, Yeongdeungpo-gu, Seoul, collectively. The variation of recognition to the local community at the migration early and the present and their response for overcoming their pending issues are studied through this, To understand the reality and conflict they encounter, the effort for overcoming the pending issues, the inner change of their own community, their fixed direction and so on becomes the core variables for integrating them to our society. They have formed the enormous cluster and have been already developed as the minority group. They are doing 'the struggle for recognition' for being recognized from the dominant group and trying to approach the politics for overcoming the inferiority of power. Accordingly, the intervention of social welfare to this minority group should be a more active working to protect the fragmentation of our society which can be resulted from the increasing influx of the foreigners and be also an approach to mutual enlightenment for making our society adapt to the phenomena of multi-nations and multi-cultures and for accepting them as the population.

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Foreign Domestic Workers in Korea (한국내 외국인 가정부 고용에 관한 연구)

  • Lee, Hye-Kyung
    • Korea journal of population studies
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    • v.27 no.2
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    • pp.121-153
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    • 2004
  • 본 연구는 국내 외국인 가정부 고용에 대한 연구로 국내 가정부 고용의 역사와 추이를 살펴 본 후, 외국인 가정부의 고용현황 및 실태를 분석하였다. 본 연구는 가정학계 쪽의 문헌 및 신문자료의 검토를 통해 조선시대 이후, 특히 1960년대 이후 내국인 가정부의 고용추이와 특성을 파악하였고, 지역별 사회복지관과 YWCA 담당자 전화조사를 통해 현재 국내 가정부 노동시장의 수요와 공급 정도를 살펴 본 후, 법무부 출입국관리국의 통계자료와 2002년 불법체류 자진신고자료 및 2001년 말부터 2004년 초까지 인터넷 웹사이트를 통한 외국인 가정부 구인구직 광고내용을 분석하여, 국내 외국인 가정부 고용의 현황과 특성을 파악하였다. 이 연구의 주요 발견은 다음과 같다. 첫째, 그간 국내에서 외국인 가정부가 활성화되지 못한 가장 중요한 이유는 다른 아시아 신흥공업국에 비해 국내 기혼여성 특히 중류층 이상의 고학력 기혼여성의 취업이 저조하였기 때문이다. 동시에, 하류층 기혼여성의 취업기회도 제한적이므로, 현재까지는 내국인 시간제 파출부 시장에서 수요보다는 공급이 더 많기 때문이다. 둘째, 필리핀인 여성 대신에 중국동포가 국내의 외국인 가정부 시장을 독점한 이유는 중국동포는 한국어는 물론 우리의 풍습을 많이 유지하고 있어서 이들을 고용하는 것이 더 편하기 때문이다. 그러나 그동안 주로 40대 이상의 중${\cdot}$고령층의 중국동포 여성이 국내로 유입되었다는 점도 이들을 '탈여성화'된 그리고 '모성적'인 입주가정부로 활용하게 된 중요한 이유이다.

협회소식 및 회장동정

  • Korea Advanced Farmers Association, Inc
    • 농업기술회보
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    • v.42 no.7 s.501
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    • pp.39-44
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    • 2005
  • 2기 도시민 웰빙농사교육 호응/"도시민 웰빙농사" 수강소감/중국, 흑룡강성 동포 농촌간부 및 농촌지도자 협회방문/본회 조춘선,유승윤 2명의 지도위원 별세/ 사과 고품질 및 피롤농업 세미나 개최/제주 문시병,진천 이문희, 임실 이재연 3명 회우 조합장 당선/복분자·뽕나무(오디)·땅콩의 묘목 및 씨앗분양안내/초대 경 기도지부장 이영순 선생 방문

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Korea's Policy on Overseas Koreans: Factors that Strengthen Korean Americans' Sentiment towards the Motherland (재외동포정책: 차세대 재미한인 교육지원 방향 중심으로)

  • Jang, Ahnlee
    • The Journal of the Korea Contents Association
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    • v.19 no.12
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    • pp.362-375
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    • 2019
  • Since Kim Dae-jung's administration, the Korean government has established policy for overseas Koreans to provide nationalism education to their descendants. While the policy is still in effect today, as to how the recipients of the support in the USA make meaning of the programs given much changes in the social climate in respect to Korean culture, has not been examined in-depth. Therefore, through in-depth interviews with Korean Americans, the current study examined how the recipients of the educational program perceive policy on education program towards Korean Americans and whether it has strengthened their nationalism or sentiment towards motherland. The study further examines the factors that influences their sentiments towards the motherland as identified by Korean Americans. The findings show that exposure to the culture and parents' teachings of the Korean values have helped them embrace Korean heritage. Moreover, findings revealed that their sense of Koreanness were due to positive memories from visits they had when they were young and changes in Korea's status in the global arena. Future direction of the policy and suggestion for specific programs for Korean Americans, as well as implications of the findings are discussed.

First Report of Rust Disease on Fringe Tree by Puccinia sp. and Its Alternative Host (Puccinia sp.에 의한 이팝나무 잎녹병 발생 및 중간기주 보고)

  • Yu, Nan Hee;Park, Ae Ran;Yoon, Hyeokjun;Son, Youn Kyoung;Lee, Byoung-Hee;Kim, Jin-Cheol
    • Research in Plant Disease
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    • v.26 no.3
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    • pp.179-182
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    • 2020
  • In July 2018, a serious rust symptom was found throughout the fringe trees planted in Gangjin-gun, Korea. Yellow and brown spots were observed on the adaxial (topside) surface of the collected fringe tree leaves, and yellow color aecia were observed on the abaxial (underside) surface leaves. The size of aeciospore and urediniospores of JCK-KCFR1 strain were measured to 41.2 ㎛ (Φ) and 28.84 ㎛ (Φ) with a light microscope. Phylogenetic analysis of the small subunit rRNA, internal transcribed spacer, and large subunit rRNA region indicated that JCK-KCFR1 strain is novel species of the genus Puccinia and closely related to Puccinia kusanoi, which has been reported a rust pathogen on bamboo. In May 2019, rust symptoms were also discovered on the bamboo leaves planted around the fringe tree on Muwisa-ro, and their telia and teliospores were observed on the abaxial leaf surfaces of the bamboo with 100% sequence homology with the rust of the fringe tree. This is the first report that Puccinia sp. JCK-KCFR1 is a new species that requires both primary (fringe tree) and alternative (bamboo) host plants to complete its life cycle in Korea.