Saussurea chabyoungsanica Im ( Compositae ), a New Species from Mt. Chabyoung-san , Korea

Hyoung Tak Im,Hang Hwa Hong,Chung Il Choi 한국식물학회 1997 Journal of Plant Biology Vol.40 No.4

고깔제비꽃, 왜제비꽃, 남산제비꽃 집단의 광조건에 따른 영양생장적 특징

임형탁 ( Hyoung Tak Im ),홍행화 ( Hang Hwa Hong ) 한국환경생물학회 2013 환경생물 : 환경생물학회지 Vol.31 No.4

임상의 동일 공간에 생육하고 있는 제비꽃속 세 종(고깔제비꽃, 왜제비꽃, 남산제비꽃)의 영양생장적 특징과 광량의 관계를 통해 각 종의 전략자적 특징을 알아보았다. 본 연구는 광주광역시에 위치한 무등산의 다섯개 지점으로부터 1994년, 1995년, 2000년에 중점 조사가 수행되었고, 2007년과 2010년 추가 조사가 진행되었다. 각 종의 집단 내 개체수의 변동, 개체의 건중량과 엽수, 조도에 따른 종의 분포 유형 분석을 통해 세 종이 임상의 광양에 의해 서로 다른 생태적 지위를 얻고 있음을 알 수 있었다. 고깔제비꽃은 K-전략자로서, 왜제비꽃은r-전략자로서, 남산제비꽃은 두 종의 중간에서 그 생태적 지위를 차지하는 것으로 해석되었다. In this study we investigated the relationship between characteristics of vegetative growth of three species of Viola (V. rossii, V. japonica, and V. dissecta var. chaerophylloides) and light in order to explain how these three species could live together under a closed space in a forest. This studywas carried out at five sites in Mudeung-san (Mt.) on 1994, 1995, and 2000 and additional investigations were performed on 2007 and 2010 at the same sites. In order to find the relationship, three main investigations were conducted: counting number of individuals for each investigated year, measuring dry mass and counting developed leaves per plant, and finding presenting patterns of each species with reference to incidence of light. As a result, we found that three species could share the closed space in a forest because of their different adaptive strategies like V. rossii as Kstrategist, V. japonica as r-strategist, and V. dissecta var. chaerophylloides as an intermediator between two species.

Pollination of Cleisostoma scolopendrifolium (Orchidaceae) by megachilid bees and determinants of fruit set in southern South Korea

Son, Hyun-Deok,Im, Hyoung-Tak,Choi, Sei-Woong The Ecological Society of Korea 2019 Journal of Ecology and Environment Vol.43 No.1

We investigated the pollinators of Centipede's foot orchid (Cleisostoma scolopendrifolium) at five locations in southern Korea. Only one species of megachilid bee (Megachile yasumatsui) was observed at three of the sites (Mokpo, Haenam, and Wando). We assumed that the megachilid bee worked as a sole pollinator of C. scolopendrifolium based on the visiting behavior of the bees the attached pollinia. Fruits were observed at the three locations that bees visited: 74% fruit set at Mokpo, 59% at Wando, and 31% at Haenam. By contrast, at two of the locations where megachilid bees did not visit the plants (Naju and Jindo), there were no fruits set. The differences in fruit set rates at the three orchid populations where bees were observed appear to be related to bee abundance and flower visitation rate rather than to differences in flower abundance. The pollination interaction between C. scolopendrifolium and megachilid bees appears to involve sexual deception since only male bees were attracted to the flowers. The underlying mechanism involved in this interaction needs investigation.

Pollination biology of Caesalpinia decapetala (Leguminosae) in Korea

Hyun-Duk Son,Hyoung-Tak Im 국립생물자원관 2015 Journal of species research Vol.4 No.2

Morphological changes of flowers and insect visitors were observed to investigate pollinator of Caesalpinia decapetala. The flowers of C. decapetala are protandrous. Functionally, the flower is changed from male to female. As a male, pollen grain is released after anther dehisced while style is immature. After completed pollen grain release, the style starts to lengthen. It helps the stigma to easily touch the carpenter bee’s thorax covered with pollen grain. At this time, flower functions as a female. The majority of taxa and individuals observed were Hymenoptera. The most frequent visitor was the Xylocopa appendiculata circumvolans, carpenter bee. Carpenter bees exhibited only typical pollinator behavior among flower visitors, with touching reproductive organs and seeking nectar at the same time. The pollination behavior is as follows. Soon after carpenter bees perceived guide mark, they foraged rightward and grasped style and stamens with legs and they inserted proboscis into standard petal to seek nectar. With this behavior, the pollen grains of the male flower transfer to the ventral thorax of the carpenter bee. As the carpenter bee moves to another female flower, the deposited pollen grains are delivered to the stigma.

Pollination biology of Caesalpinia decapetala (Leguminosae) in Korea

Son, Hyun-Duk,Im, Hyoung-Tak The National Institute of Biological Resources 2015 Journal of species research Vol.4 No.2

Morphological changes of flowers and insect visitors were observed to investigate pollinator of Caesalpinia decapetala. The flowers of C. decapetala are protandrous. Functionally, the flower is changed from male to female. As a male, pollen grain is released after anther dehisced while style is immature. After completed pollen grain release, the style starts to lengthen. It helps the stigma to easily touch the carpenter bee's thorax covered with pollen grain. At this time, flower functions as a female. The majority of taxa and individuals observed were Hymenoptera. The most frequent visitor was the Xylocopa appendiculata circumvolans, carpenter bee. Carpenter bees exhibited only typical pollinator behavior among flower visitors, with touching reproductive organs and seeking nectar at the same time. The pollination behavior is as follows. Soon after carpenter bees perceived guide mark, they foraged rightward and grasped style and stamens with legs and they inserted proboscis into standard petal to seek nectar. With this behavior, the pollen grains of the male flower transfer to the ventral thorax of the carpenter bee. As the carpenter bee moves to another female flower, the deposited pollen grains are delivered to the stigma.

Outcome of Reinduction Chemotherapy with a Modified Dose of Idarubicin for Children with Marrow-Relapsed Acute Lymphoblastic Leukemia: Results of the Childhood Acute Lymphoblastic Leukemia (CALL)-0603 Study

Koh, Kyung-Nam,Im, Ho Joon,Kim, Hyery,Kang, Hyoung Jin,Park, Kyung Duk,Shin, Hee Young,Ahn, Hyo Seop,Lee, Ji Won,Yoo, Keon Hee,Sung, Ki Woong,Koo, Hong Hoe,Lim, Young Tak,Park, Jun Eun,Park, Byung-Kiu KOREAN ACADEMY OF MEDICAL SCIENCE 2017 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.32 No.4

<P>This multicenter, prospective trial was conducted to develop an effective and safe reinduction regimen for marrow-relapsed pediatric acute lymphoblastic leukemia (ALL) by modifying the dose of idarubicin. Between 2006 and 2009, the trial accrued 44 patients, 1 to 21 years old with first marrow-relapsed ALL. The reinduction regimen comprised prednisolone, vincristine, L-asparaginase, and idarubicin (10 mg/m<SUP>2</SUP>/week). The idarubicin dose was adjusted according to the degree of myelosuppression. The second complete remission (CR2) rate was 72.7%, obtained by 54.2% of patients with early relapse < 24 months after initial diagnosis and 95.0% of those with late relapse (<I>P</I> = 0.002). Five patients entered remission with extended treatment, resulting in a final CR2 rate of 84.1%. The CR2 rate was not significantly different according to the idarubicin dose. The induction death rate was 2.3% (1/44). The 5-year event-free and overall survival rates were 22.2% ± 6.4% and 27.3% ± 6.7% for all patients, 4.2% ± 4.1% and 8.3% ± 5.6% for early relapsers, and 43.8% ± 11.4% and 50.0% ± 11.2% for late relapsers, respectively. Early relapse and slow response to reinduction chemotherapy were predictors of poor outcomes. In conclusion, a modified dose of idarubicin was effectively incorporated into the reinduction regimen for late marrow-relapsed ALL with a low toxic death rate. However, the CR2 rate for early relapsers was suboptimal, and the second remission was not durable in most patients.</P>

멸종위기종 지네발란(Sarcanthus scolopendrifolius Makino)의 수분작용에 기여하는 가위벌 및 수분 기작 연구

손현덕(Hyun-Deok Son),임형탁(Hyoung-Tak Im),최세웅(Sei-Woong Choi) 한국양봉학회 2017 韓國養蜂學會誌 Vol.32 No.3

도시형 삼림욕장 목초본식물의 내음성 연구

김종진,홍성각,임형탁 한국임학회 2000 한국산림과학회지 Vol.89 No.5

The studies were carried out to know shade tolerance of the plants for the urban forest aromatic bath. The one to two year old potted seedlings were grown under the one of the five light conditions such as 100%, 50%, 30%, 10% and 2% of the full sun light intensities. Pinus densiflora S. et Z., P. sylvestriformis (Takenouchi) Chien., Thymus quinquecastatus Celak, Lonicera japonica Thunb, and Zingiber officinale Roscoe showed decreasing tendencies in height and root collar diameter growth, and dry mass production as the light intensity decreases. Exceptionally Thuja koraiensis Nakai showed the best growth in the 50% of full sun light intensity. Athyrium yokoscense (Fr. et Sab.) H. Christ showed better growth in the relative light intensity of 10 to 15% than in the in the relative light intensity of 25 to 30% in the bath green house.

조직배양 지치의 염색

박수영(Soo-Young Park),임형탁(Hyoung-Tak Im),황성진(Sung-Jin Hwang) 한국조형디자인학회 2005 조형디자인연구 Vol.8 No.1

본 연구는 식물염색의 생물 산업화에 있어서 기초가 되는 지속적 염료 공급의 가능성을 제시하기 위해 수행되었다. 생물 산업은 양질의 재료식물의 지속적 공급에 기반을 둔다. 전래의 중요한 염료식물인 지치는 과도한 채취로 절멸 위기에 처해 있으며 재배 또한 어려운 실정이다. 조직배양을 통해 증식시킨 모상근(hairy root)을 이용하여 지치의 알코올염색을 시도하였다. 1. 식물염색은 생물 산업으로 발전되어야 한다. 2. 생물 산업에는 고품질 식물재료의 지속적 공급이 필요하다. 3. 중요한 염료 및 약용자원식물인 지치는 희귀식물이 되었다. 4. 조직배양으로 지치를 대량 증식하고,알코올로 색소를 추출한다. 5. 공예와 생물학의 연결로 식물염색의 생물 산업화가 가능해진다. This study has been carried out to demonstrate the possibility of a sustainable supply of dyeing stuffs , which is the basis for industrialization of plant dyeing. The biotechnology industry is based onthe sustainable supply of quality raw plant s. Gromwell, one of the more important traditional dyes, is at risk of extinction due to heavy culling. Furthermore, its horticulture has turned out to be very difficult. This study tries to alcohol(ETOH extracting gromwell dye from hairy roots cultivated through tissue culture. 1. Plant dyeing should be developed into an industry. 2. The biotechnology industry requires a sustainable supply of quality raw plants. 3. Gromwell, an important dyes and medicinal plant, has become an endangered species . 4. Dye is extracted from gromwell using ETOH, which is cultivated on a large scale through tissue culture. 5. Linkage of cut craft with biology enables the industrialization of plant dyeing.

천관산 지역의 관속식물상

임동옥 ( Dong Ok Lim ),임형탁 ( Hyoung Tak Im ) 한국환경생태학회 2003 한국환경생태학회지 Vol.16 No.3