• Landscaping Tree
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• s.96
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• pp.16-18
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• 2007

전.남북, 경.남북, 제주도, 울릉도 등 남부 도서지방의 표고 700m이하에서 자라는 상록활엽고목으로 수고 20m, 직경 1m까지 자란다. 특히 일부 지자체에서는 지방을 상징하는 나무로 지정되어 주민의 사랑을 받고있다. 녹나무과에 속하는 후박나무는 잎이 광택을 띠며, 봄에 나는 새순은 단풍과 같이 붉게 물들어 아름답다. 가로수, 조경수로 많이 식재되고 있어 봄과 여름에는 다른 수종들과 어울러져 남들을 더욱 돋보이게 하고 가을과 겨울에는 혼자만이 꿋꿋이 녹색을 띠면서 적막한 도시의 거리를 조금이나마 부드럽고 훈훈하며 따뜻한 느낌을 주는 나무이다. 이러한 후박나무를 가해하는 해충으로 나무좀류와 기타 해충에 대한 생태 및 방제법을 간략하게 소개하고자 한다.

• Journal of Conservation Science
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• v.31 no.4
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• pp.341-350
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• 2015

The preservation has been conducted for wooden ship timber excavated from Bonghwang-Dong, Gimhae, Korea. The species were analyzed for conservation as pre-treatment. Outer panel was analyzed as Cinnamomum spp. and trapezoid wooden material, wooden wedge was Cryptomeria japonica D. Don.. Wooden ship timber have been treated by vacuum-freeze drying after impregnation with aqueous PEG#3,350 solution(almost 45%). The timber of Bonghwang-Dong ship is considered as Japanese ship that many data such as conformation of ship, location of site, japanese artifact of around site were confirmed. In addition, The ship timber give us the important information about the international trade with Japan.

• Journal of Korean Society of Forest Science
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• v.76 no.4
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• pp.317-329
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• 1987

A comparative anatomy between the secondary xylem in the root and the stem of some Korean Lauraceae, including 6 genera and 7 species, was carried out in this study. The results are as follows; diameter and length of vessel element and fiber are wider and longer in the root than the stem. The angle of end wall of vessel element is more inclined in the root than the stem. Also more number of bar on the perforation plate of vessel element in root wood is found. From the anatomical characters of root and stem wood in some Lauraceous species, it is suggested that the wood of the root is phylogenetically mote primitive than that of the stem, except the diameter of vessel element.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.55-55
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• 2019

본 연구에서는 실내에 조사되는 다양한 광량하에서 녹나무과 목본 2종을 재배하면서 생육반응을 조사하였다. 식물재료는 참식나무[Neolitsea sericea (Blume) Koidz.]와 후박나무(Machilus thunbergii Siebold & Zucc.)의 3년생 실생묘를 사용하였다. 실험공간은 광량을 10, 50, 100 및 200 PPFD (${\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)로 달리하였으며, 광주기(12/12 h), 온도($25{\pm}1^{\circ}C$), 습도($55{\pm}3%$) 및 관수(1회/3일) 조건이 동일하게 유지되는 밀실로 조성되었다. 각 광량조건 하에서 8주간 재배된 식물의 생육특성 및 광화학반응이 조사되었으며, 유리온실에 동일 기간동안 재배한 식물과 비교하였다. 연구 결과, 참식나무는 광량에 관계없이 초장을 제외한 전반적인 생육반응이 유사하였으며, 엽록소함량(SPAD)은 광량이 증가함에 따라 감소하는 경향이었다. 최대양자수율(Fv/Fm) 및 스트레스지수(Fm/Fo)는 200 PPFD에서 유의한 차이를 나타냈으며, 이는 대조구와 유사한 경향이었다. 후박나무는 대조구와 비교하여 모든 광량조건에서 초장이 감소하였으며, 특히 10 PPFD에서는 잎의 탈락에 따른 관상가치가 저하되었다. 엽록소함량은 100, 200 PPFD 광량에서 감소하였으며, 대조구도 유사한 경향을 나타냈다. 또한 유리온실의 대조구와 100, 200 PPFD 광량에서 최대양자수율, 스트레스지수 및 PSII 성능지수(Pi_Abs)의 유의한 차이가 확인되었다.

• Landscaping Tree
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• s.120
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• pp.25-27
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• 2011

남부지역인 전 남북, 경 남북, 제주도, 울릉도 등 남부도 도서지방의 표고 700m이하에서 자라는 상록활엽고목으로 일부 지자체에서는 지방을 상징으로 나무로 지정되어 주민의 사랑을 받고 있다. 특히 경남 통영, 남해 지역에서는 가로수로 집단화되어 최근 많은 해충들로 몸살을 앓고 있다. 특히 철쭉류에서만 서식하는 것으로 보고된 진달래방패벌레과, 호두나무와 가래나무에 피해를 많이 주는 벼슬집명나방이 후박나무 집단 가로수 식재지에서 2010년 조사에서 처음으로 발견되었다. 그리고 피해도 기존의 해충으로 등록된 다른 해충보다도 피해가 심했다. 따라서 이들 해충에 대한 정밀조사가 필요하다고 하겠다. 녹나무과에 속하는 후박나무는 잎이 광택을 띠며, 봄에 나는 새순은 단풍과 같이 붉게 물들어 아름답다. 가로수, 조경수로 많이 식재되고 있어 봄과 여름에는 다른 수조들과 어울러져 남들을 더욱 돋보이게 하고 가을과 겨울에는 혼자만이 꿋꿋이 녹색을 띠면서 적막한 도시의 거리를 조금이나마 부드럽고 훈훈하며 따뜻한 느낌을 주는 후박나무에 새로운 가해해충에 대한 정보를 소개하여 피해를 최소화 하고자 한다.

• Journal of Plant Biology
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• v.29 no.4
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• pp.329-340
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• 1986

This study is attemped to discuss the taxonomic significances as have been raised up to now in the study of Lauraceous inflorescence. Lauraceous inflorescences are recognized as panicle, umbel, dichasium, or fascicle by various investigators. Reconsidering the inflorescence or existence of involucre, which has been accepted as important character in the present classification system, it is assumed that the study about them has not so far carried out a deliberate analysis over inflorescent morphology, nor has recognized the existence of involucre. Furthermore, all the materials examined in this study have fugacious or persistent involucres which are leafy, scaly or membraneous. Therefore, it was found that the kinds, fugacity or persistency of involucres are significant in the problems of classification of Laureaceae. Korean Lauraceous inflorescence has evolved into the direction of continuous reduction in its peduncle: from compound dichasium to capitate umbel.

• Journal of Plant Biology
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• v.27 no.3
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• pp.149-162
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• 1984

Anatomical characters of the secondary xylem in roots of Lauraceae, including 6 genera and 13 species grown in Korea, were studied systematically. Lauraceors members studied anatomically possess characters of the secondary xylem that are in the main more specialized than those found in the primitive angiosperm families. The specialized characters are as follows; (1) mostly solitary pores with some radially multiples, (2) mostly simple perforation plates and partially scalariform perforation plates in all species, (3) slightly oblique end wall of vessel element, (4) predominantly alternate intervascular pitting, (5) paratracheal axial parenchyma in all species, (6) heterogeneous II or III vascular rays. It is considered that the series of specialization in this family from the perforation plates and angle of end wall to the vessel axis is as follows; MachiluslongrightarrowNeolitsealongrightarrowLinderalongrightarrowCinammomumlongrightarrowIozostelongrightarrowLitsea.

• Journal of Plant Biology
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• v.27 no.3
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• pp.129-138
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• 1984

Floral structures of 11 korean lauraceous species belonging to six genera have been studied. Machilus is a primitive genus having relatively large bisexual flower, six tepals and staminodes in fourth whorl of stamen. The flowers of Neolitsea are highly reduced state as unisexual flower, six stamens arranged to three whorls and no staminode in the flower, so regared as more advanced group. Intrafamilial classification systems of Nakai (1939) and Pax (1891) are more reasonable but still have some discrepancies with results. The origin of tepals of this group has been a long controversial problem; whether the differentiation of tepals occur. Teratological study of Lindera erythrocarpa, inner tepals of this group must be originated from the staminode and outer tepals from leafy tepals. Although morphological differentiation does not sitll occur, inner and outer whorls of tepals are originated through different way.

• Korean Journal of Plant Resources
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• v.31 no.5
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• pp.423-432
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• 2018

This study was performed to develop a new natural antimicrobial materials by analyzing the effect of extracts obtained from Ten Lauraceae Species on the inhibitory activity against Propionibacterium acnes. The plant materials were collected from Wando and Jeju islands, and the antimicrobial activity of the crude extracts was examined by the agar diffusion method with different part (i.e., leaf and branch), solvents (i.e., distilled water, 80% ethanol, and 100% methanol) and at different ultrasonic extracting times (i.e., 15, 30, and 45 minutes). The control agents used were synthetic antimicrobials, methylparaben and phenoxyethanol, at concentrations of 0.4, 1, 2, and 4 mg/disc. Altogether, extracts of 10 species used in the study showed inhibitory activity, which confirmed their antimicrobial action against acnes. Among these, leaves of Laurus nobilis L. which was extracted in 80% ethanol for 45 min showed the largest clear zone (19.8 mm). Leaves of L. nobilis L., showing highest antimicrobial activities among 10 species, were successively reextracted with n-hexane, chloroform, ethylacetate and n-butanol. As a results, in all fractions except butanol, clear zone above 10 mm were formed. The ethyl acetate fraction showed the highest inhibitory activity (13.3 mm) and the inhibitory activity was significantly higher than that of crude extract (10.2 mm) and phenoxyethanol as a control (12.5 mm).

• Applied Chemistry for Engineering
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• v.34 no.4
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• pp.388-396
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• 2023

The evaluation of fire risk for combustible materials was carried out using Chung's equations-X, Chung's equations-XI, and Chung's equation-XII, which were newly established. The fire risk index-XII (FRI-XII) and fire risk rating (FRR) were calculated for specimens including camphor tree, cherry, rubber tree, and elm. The combustion characteristics were determined using a cone calorimeter according to ISO 5660-1. Chung's equations caculated the fire performance index-X (FPI-X) and fire growth index-X (FGI-X) values ranged from 89.34 to 1696.75 s² /kW and from 0.0006 to 0.0107 kW/s² , respectively. In addition, the fire performance index-XI (FPI-XI) and fire growth index-XI (FGI-XI) varied from 0.08 to 1.48 and from 0.67 to 11.89, respectively. The fire risk index-XII (FRI-XII), which is an indicator of fire risk, showed that camphor tree had a value of 148.63 (fire risk rating: G), indicating a very high fire risk. This suggests that combustible materials with a high concentration of volatile organic compounds have lower FPI-X and FPI-XI values, higher FGI-X and FGI-XI values, and consequently higher FRI-XII values, indicating an increased fire risk.