• 한국환경복원기술학회지
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• 제17권4호
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• pp.57-67
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• 2014

The vigor condition of trees is an important indicator for the management of urban forested area. But difficulties in how to assess the tree vigor condition still remain. Previous efforts were limited in the 1) measurement of single indicator rather than using multiple indices, 2) purpose-oriented measurement such as for air-pollution effect or specific pathological symptom, and 3) ordinal-scale evaluations by field crews 4) despite human errors based on his/her experiences or prior knowledge. Therefore, this study attempted to develop a quantitative and objective methodology for assessing tree vigor condition, by measuring multiple modules and building the profile inventory. Furthermore, the possibility and limitations were discussed in terms of schematic frames describing tree vigor condition. The vigor condition of 56 flowering cherry plants in urban park were assessed by in-situ measurements of following eight items; growth of crown(Gc), growth of shoots, individual tree volume(Vol), plant area index, woody area index, leaf area index, leaf chlorophyll content(Lc) and leaf water content(Lw). For validation, these measurements were compared with the ranks of holistic tree vigor condition, which were visually assessed using a 4-point grading scale based on the expert's knowledge. As a result, the measures of each evaluation item successfully highlighted a variety of aspects in tree vigor condition, including the states of both photosynthetic and non-photosynthetic parts. The variation in the results depending on evaluated parts was shown within an individual tree, even though the broad agreement among the results was found. The result of correlation analysis between the tested measurements and 4-point visual assessment, demonstrated that the state of water-stressed foliage of the season (Lw) or the development of plant materials since sapling phase (Vol) could be better viewed from the outer appearance of trees than other symptoms. But only based on the visual assessment, it may be difficult to detect the quality of photosynthesis (Lc) or the recent trend in growth of trees (Gc). To make this methodology simplified for the broad-scale application, the tested eight measurements could be integrated into two components by principal component analysis, which was labelled with 'the amount of plant materials' and 'vigor trend', respectively. In addition, the use of these quantitative and multi-scale indicators underlies the importance of assessing various aspects of tree vigor condition, taking into account the response(s) on different time and spatial scale of pressure(s) shown in each evaluated module. Future study should be advanced for various species at diverse developing stages and environment, and the application to wide areas at a periodic manner.

• Bulletin of the Korean Chemical Society
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• 제9권3호
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• pp.149-152
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• 1988

A mixture of (Z,Z)-3,13-octadecadien-1-yl acetate(1) and its (E,Z)-isomer(2), the sex pheromone of the cherry tree borer, Synanthedon hector Butler was synthesized. (Z)-11-Octadecen-1-al(3) was prepared from 1,10-decandiol. The Wittig reaction the above aldehyde3 with carboethoxymethylenetriphenylphosphorane, or the Wadsworth-Emmons reaction of the above aldehyde3 with the anion of triethylphosphonoacetate gave ethyl (Z,Z)-2,13-octadecadienoate and its (E,Z)-isomer. Deconjugative protonation of ethyl (Z,Z)-2,13-octadecadienoate and its (E,Z)-isomer with potassium hexamethyldisilazide followed by aqueous ammonium chloride work-up afforded stereoselectiv디y ethyl (E,Z)-3,13-octadecadienoate and its (Z,Z)-isomer, respectively, of which stereoselectivity was adjusted to give the product in the required ratio. Exposure of the above deconjugated ester to excess lithium aluminium hydride resulted in formation of the penultimate (Z,Z)-3,13-octadecadien-1-ol and its (E,Z)-isomer. Acetylation of the desired alcohols afford the final products, (Z,Z)-3,13-octadecadien-1-yl acetate(1) and its (E,Z)-isomer(2).

• 한국균학회지
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• 제49권3호
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• pp.315-324
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• 2021

In this study, the fungal strains KNU-Gunwi 2B and KNU-SOT5 were isolated from root-soil in a hillside and the cherry tree bark (Prunus serrulata), respectively from Gyeongbuk province in Korea. The strain KNU-SOT5 produced dark brown chlamydospores that were smooth to lightly rough-walled, globose to ellipsoidal, and the conidia were aseptate, guttulate, mostly fusiform with a diameter of 5.3-17.6×4.2-7.0 ㎛. Strain KNU-Gunwi 2B produced phialides that were smooth-walled, cylindrical with semi-papillate apices and the conidia were pale-green, broadly ellipsoid, and sometimes cylindrical with a diameter of 4.4-8.0×2.3-4.0 ㎛. The strain KNU-SOT5 and KNU-Gunwi 2B were resolved based on cultural and morphological characteristics, along with the phylogenetic analysis using the small subunit (SSU), large subunit (LSU), and internal transcribed spacers (ITS) regions. The fungal strains KNU-SOT5 and KNU-Gunwi 2B were identified as Dothidea insculpta and Metarhizium rileyi, which have not been reported in Korea.

• 한국전통조경학회지
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• 제29권4호
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• pp.124-136
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• 2011

조경분야에서 식물은 생태적 외형적 특징뿐만 아니라 설계자의 의도와 이용자 행태의 매개체 역할로 중요한 요소이다. 그러나 식물에 대한 연구는 생태 특성과 재배 환경에 집중되어있고, 식물을 통한 시대상 분석은 희소하다. 벚나무의 경우 현재는 보편화된 수종이지만, 일제강점기라는 도입배경으로만 설명된다. 따라서 벚나무로 인해서 변하게 된 전퉁적인 행락문화의 변화에 대한 연구가 필요한 시점이다. 이에 벚나무를 연대기적 시선으로 도입과 확산, 정착 과정과 상징 의미의 변천을 살펴 본 결과는 다음과 같다. 첫째, 왕벚나무는 1907년 도쿄와 오사카에서 3년생 묘목 1,500본을 최초로 수입하여 남산 왜성대 공원에 식재하였다. 이후 조선의 전통공간 근대공원 신작로에 식재하였는데, 식재의 증가 배경에는 총독부의 적극적인 지원하에 묘목을 양육하여 판매한 것에도 기인한다. 벚나무 확산으로 말미암아 왕벚나무는 제주도가 원산지라는 것에 대한 논쟁이 발생했다. 둘째, 벚나무가 대규모로 식재된 공간은 벚꽃 명소가 되었고, 당시 매체의 적극적인 홍보로 관앵과 야앵이 경성의 상춘문화로 정착하는 계기가 되었다. 셋째, 관앵과 야앵이 보편화된 행락문화가 되었지만, 벚나무에 대한 이중적 시선과 태도는 구분된 명칭 사용으로 표출되었다. 벚꽃 앵 사쿠라가 혼재되었고, 밤벚꽃놀 이도 요자쿠라 아닌 야앵 밤벚꽃놀이를 사용하였다. 혼재된 벚꽃에 대한 단어 사용의 이면에는 벚꽃놀이를 저급한 문화로 보는 시선도 공존했다. 넷째, 벚꽃이 식재된 조선의 상징공간은 위락공간화 되어 소비되는 공간으로 변모했다. 벚꽃놀이는 연예 행사 영화 상영 레뷰걸의 공연과 함께 진행되었고, 입장료만 내면 누구든지 즐길 수 있었기 때문이다. 기존 전통적인 행락문화의 계급성은 벚꽃놀이 공간에서 와해되어 무질서한 모습이 문제 시 되기도 하였다. 이처럼 벚꽃(벚나무)는 일제강점기라는 역사적 시기를 거치면서 전통적인 행락문화를 변화시키는 변이점이 되었고, 더불어 현재의 일상적인 상춘문화로 정착되었다.

• 한국산림과학회지
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• 제96권2호
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• pp.208-213
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• 2007

This study is designed to provide forest managers and landowners with tools to estimate the effect of forest management on carbon storage, investigating living tree biomass, detritus, and harvested wood products as variables. Thinning, selection cutting, and uncutting were applied to the three different forest types in New York, USA. Carbon storage of the original stands was 90, 56, and $101Mg\;ha^{-1}$ at the Allegheny hardwood forest, Northern hardwood forest, and Oak - black cherry forest, respectively. Among treatments, uncutting generally stored the greatest amount carbon. However, the rate of carbon storage was the smallest at the uncut treatment in all the sites. The 50% thinning, 50% selection, and 50% thinning treatments were the highest rate of carbon storage at the Allegheny hardwood forest, Northern hardwood forest, and Oak - cherry forest, respectively. In this study, only short term was applied to simulate carbon sequestration after silvicultural treatment. So, more research is needed to determine whether any silvicultural treatment can store significantly more carbon than no treatment over the long term.

• 한국토양비료학회지
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• 제45권5호
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• pp.787-791
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• 2012

펩타이드는 Asp, Glu, Leu을 주요 구성 아미노산으로 하는 한우 혈청을 단백질 분해효소로 분해 후 한외여과를 거쳐 제조하였다. 단백질 분해효소는 alcalase, esperase, flavourzyme, protamex를 이용하였고 alcalase가 가장 좋은 분해력을 나타내어 폡타이드 생산을 위한 혈청 분해에 활용하였다. 한우 혈청으로부터 분리한 펩타이드와 킬레이트 결합한 칼슘 (chelate-Ca)과 게르마늄 (chelate-Ge)을 방울토마토에 적용하여 흡수 변화를 확인하고자 시험을 수행하였다. Chelate Ca을 500, 1,000, 2,000배로 희석하여 방울토마토 재배에 적용한 결과, 처리 농도 및 횟수 증가에 따라 엽과 과실의 칼슘함량이 다소 증가하여 대조처리 Calciolid Ca-300 (3409.1, $67.5mg\;kg^{-1}$)이 Chelate Ca-200 (3781.1, $78.0mg\;kg^{-1}$) 보다 처리농도가 높음에도 불구하고 그 함량이 낮아 킬레이트 칼슘의 흡수율이 더 많았다. Chelate Ge을 50, 100, 200배로 희석하여 적용한 결과, 방울토마토 엽의 게르마늄 함량이 처리 농도가 높을수록 많아져 대조구와 Ge $132^{(R)}$-20 보다 모든 처리구에서 2배 이상의 높은 함량을 나타내었다. 본 연구를 통해 펩타이드와 킬레이트 결합한 칼슘과 게르마늄을 방울토마토에 시용할 경우 그 흡수율이 증가되는 것을 확인하였다.

• 농업생명과학연구
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• 제43권3호
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• pp.1-6
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• 2009

빗자루병에 의하여 심각하게 이병된 제주도 5.16도로의 왕벚나무 가로수들에 대하여 피해 상황과 이병 발병 원인을 생태적으로 밝히고 그에 따른 방제 대책을 마련키 위하여 본 연구를 수행하였다. 왕벚나무 가로수 중 45년생 이상의 노거수들은 거의 모두가 심각한 정도의 빗자루병에 감염되었으며, 30년생 역시 모든 나무들이 감염되었으나 중간 정도의 발병 반응을 보이고 있었다. 그러나 수령이 23년생 미만의 왕벚나무들은 병징을 찾아볼 수 없는 건전주로 생장하고 있었다. 3년 주기로 전정 작업을 실시한 제주대학교 입구에 식재된 왕벚나무에서는 도로변 남쪽면의 나무들이 북쪽면에 비해 병 발생이 심하고 생육 또한 저조하였다. 병 발생이 심각한 산천단으로부터 견월악까지의 횡단로 좌우 인근 30m내에 자생하는 벚나무들은 수령에 따라 차이는 있지만 병 발생이 경미하였다.

• 대한수학회논문집
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• 제25권1호
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• pp.149-160
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• 2010

Among the distance based algorithms in phylogenetic tree reconstruction, the neighbor-joining algorithm has been a widely used and effective method. We propose a new algorithm which counts the number of consistent quartets for cherry picking with tie breaking. We show that the success rate of the new algorithm is almost equal to that of neighbor-joining. This gives an explanation of the qualitative nature of neighbor-joining and that of dissimilarity maps from DNA sequence data. Moreover, the new algorithm always reconstructs correct trees from quartet consistent dissimilarity maps.

• 한국조경학회지
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• 제32권5호
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• pp.52-62
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• 2004

This research is basic research about 「the afforestation project of the Shilla Dynasty's capital forest」 which is controlled by the research institute of forest and environment of Kyungbuk province. The results of the investigation about target places and selection of major species of trees is as follows. 1. In the Shilla Dynasty's times, the peach tree was the indicator of unusual changes in weather, and was also the symbol of unsurpassed beauty. Peach trees were so prevalent that people called the forest peach-hill or peach-forest. Therefore, the main tree of Shilla Dynasty's capital forest would have to be a peach tree. 2. From several records, pine and bamboo were planted or grown together. The pattern of planting trees like this case is also historic, so should be utilized positively. 3. In order to afforest the capital forest, the bamboos have to be planted on Nam-mountain in Kyung-ju, and maple trees have to be planted on Kumgang mountain. 4. There were many big trees during the Shilla Dynasty, and the name of one of the Six Main Villages was 'Big Tree Village'. Therefore, big and long-lived trees have to be planted also. 5. The willow tree has to be considered for afforesting the capital forest even though the willow trees are misunderstood to cause allergies. They are traditional landscape architecture trees. In the traditional literature, the willow tree stands for good news. 6. Japanese cornellian cherry(Cornus officinalis), which is related with old narrative literature in the era of King Kyungmun, has to be planted for the forest, and has to be considered to be an educational tree. 7. Korean Rhododendron, which is related with Madam Suro's story, has to be planted in stone gardens.8. Lotus, Korean pulsatilla, Boxwood, Bombycis Mulberry, and Japanese Apricot have been recorded just one time, but these are also important plants which have to be reflected on afforestation of capital forest project. 9. The forests of Shilla on the old records exist in 17 places. The afforestation project has to be undertaken at these places. 10. The people of Shilla deified the forest and trees, which were the places where ancestral rites had been performed. For example, Gyerim, Sinyurim, and Wanggasu were the sacred forests of the capital forest.

• The Korean Journal of Ecology
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• 제2권1호
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• pp.1-8
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• 1978

Epiphytic lichens were sampled quantitatively on the cherry trees (Prunus serrulata) at Jeonju and Hadong along both north and south exposures of tat trees. Coverage of lichens was determinated for each species by 10*20cm quadrat. Lichen species diversities such as total diversity (D), mean diversity (D), Shannon diversity (D') and redundancy (R) were estimated according to Brillouin and Shannon equation. The importance value of lichen species was meassured by niche preemption model, The importance value transformed into some fraction k of the niche space. The value of k was compared with aggregation of lichens communities in to areas. The ten most important awariensis, Parmelia incurva, Parmelia crinita, Dirinaria applanta, Parmelia wallichiana, Parmelia austrosinensis and Cetraria platyphylla. The mean coverage epiphytic lichens on north side of tree was higher than of south side in two areas. The species diversities of epiphytic lichen of two areas shows that a change in the value of D' along vertical was not paralled with the D and R. In Kumsan-sa, D, D and D' increased upward along the tree of north exposure, but did not follow this trend in south, However in Sangge-sa, D, D and D' of both sides increased.