• Title/Summary/Keyword: Styrax

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Physical and Mechanical Properties of Local Styrax Woods from North Tapanuli in Indonesia

  • Iswanto, Apri Heri;Susilowati, Arida;Azhar, Irawati;Riswan, Riswan;Supriyanto, Supriyanto;Tarigan, Joel Elpinta;Fatriasari, Widya
    • Journal of the Korean Wood Science and Technology
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    • v.44 no.4
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    • pp.539-550
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    • 2016
  • The objective of this research was to evaluate physical and mechanical properties of three species of Styrax woods from North Tapanuli in Indonesia. The woods were more than 15 years old. Physical properties such as specific gravity, green moisture content, and volume shrinkage were determined by the procedures based on BS-373 standard for small clear specimen. Furthermore, mechanical properties, including modulus of rupture, modulus of elasticity, compression parallel to grain and hardness were also tested according to the standard. Along the stem direction, the edge section had better properties compared with those near the pith section. And the base section had also better properties than upper section. Based on the specific gravity, all of the Styrax woods in this research were classified into III-IV strength classes. A good dimensional stability was demonstrated by the value of the tangential and radial ratio which reached one. With the consideration of the mechanical properties, Styrax woods were suitable use for raw materials of light construction, furniture and handy craft.

Pharmacognostical Studies on the Korean Folk Medicine "DdaeJukNaMu" (민간약 때죽나무의 생약학적 연구)

  • Bae, Ji-Yeong;Park, Jong-Hee
    • Korean Journal of Pharmacognosy
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    • v.43 no.3
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    • pp.198-200
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    • 2012
  • Korean Folk Medicine 'DdaeJukNaMu' has been used mainly to cure toothache and neuralgia. With regard to the botanical origin of 'DdaeJukNaMu', it has been considered to be Styrax species of Styracaceae, but there was no pharmacognostical confirmation on it. To clarify the botanical origin of 'DdaeJukNaMu', the anatomical characteristics of the branch of Styrax species growing wild in Korea, Styrax japonica and Styrax obassia were studied. As a result, it was clarified that 'DdaeJukNaMu' was the branch of Styrax japonica.

Effects of Air Pollution on Physiological characteristics of Styrax japonica in Yeolchon Industrial Complex (여천공단주변 대기오염이 때죽나무의 생장 특성에 미치는 영향)

  • 김동근
    • Journal of Korean Society for Atmospheric Environment
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    • v.16 no.2
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    • pp.121-128
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    • 2000
  • To identify the effects of air pollution on several physiological characteristics of Styrax japonica in Yeochon industrial comples soil properties photosynthetic capacity and chorophyll contents were investigated. All of these measurements were taken on Styrax japonica stand at 1. 3 and 7km from an industrial complex which is an air pollution source. In addition a Styrax japonica stand in Sang-ju city was selected as a control Each physiological measurement was in leaves of east-, west- south- and north-facing branches. The results obtained were as follows: 1) Al contents of soil in Yeochon industrial complex were higher than those of Sang-ju city a non-polluted area. higheral contents contributed to decrease in soil pH. 2) Chlorophyll contents of leaves at 1km from the industrial complex closest from the air pollution source were lower than those of 3 and 7km/ 3) Photosynthetic capacity of Styrax japonica at 1km from the air pollution source was lower than those at 3 and 7km.

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Seed propagation and softwood cutting of native styrax japonicus for landscape tree uses (한국 자생 때죽나무의 조경수 이용을 위한 번식방법에 관한 연구)

  • 권오준;심경구;하유미
    • Journal of the Korean Institute of Landscape Architecture
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    • v.25 no.2
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    • pp.9-19
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    • 1997
  • These studies were carried out to investigate seed propagation method and conducted using stem cuttings of Styrax japonicus for using as a woody landscape plant. The results are obtained as follows. After the H\sub2\SO\sub 4\ and GA\sub 3\ treatment to the seeds of Styrax japonicus, three months of warm treatment followed by cold stratification for four months increased seed germination rate. The rooting rate of Styrax japonicus was increased by the treatment with concentrated IBA, especially highest at 7,000ppm. Rooting percentages were highest for cuttings taken on July 15, 1995. Therefore, the most effective method for rooting of Styrax japonicus was treatment with 7,000ppm IBA on July 15 cuttings, which showed rooting rate of over 90%. Half-leaf-remained cuttings were more effective than those with two leaves on rooting of Styrax japonicus. Dipping for 10 seconds in IBA solution resulted in rooting rate of over 70%. The longer the treatment time the worse the rooting.

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Analysis of Relationship of the Korean Styracaceae by RAPD Markers (RAPD markers에 의한 한국산 때죽나무과(Styracaceae)식물의 유연관계)

  • Kim, Hyuk-Jin;Tae, Kyoung-Hwan;Kim, Joo-Hwan
    • Korean Journal of Plant Taxonomy
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    • v.37 no.2
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    • pp.143-153
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    • 2007
  • In order to estimate the relationships among four taxa (Styrax japonicus, Styrax obassia, Styrax shiraianus and Pterostyrax hispidus) of two genus in the Styracaceae and their regional populations, RAPDs analysis was performed. Fifteen random primers generating 238 RAPD bands were enough to reveal differences in genotype bands. They were clustered into three groups by the UPGMA phenogram. The first group was Styrax japonicus populations, the second group was consisted of Styrax obassia populations and S. shiraianus populations, and third group was Pterostyrax hispidus population. The UPGMA phenogram based on RAPD analyses showed that Styrax obassia and S. shiraianus had the closest relationship among four taxa. Species as well as genera of the Korean Styracaceae were well discriminated by the RAPD analyses.

Studies on Restoraation of Forest-Floor Vegetation Devastated by Recreational Trampling(II) -A Comparison of Growth for Selection of Native Tree Species- (답압으로 훼손된 임간나지의 임상식생 복원에 관한 연구(II) -자생 수종선발을 위한 생장력 비교-)

  • 오구균;우보명
    • Journal of the Korean Institute of Landscape Architecture
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    • v.21 no.1
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    • pp.51-61
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    • 1993
  • Seeding treatment was used for 2 years at an artificial bare ground for selecting tree species suitable for forest-floor revegetation. 2 ${\times}$2${\times}$2 factorial experiment was used with a randomized complete block design for 19 native tree species and results were summarized as follows; 1. Native species suitable for restoration of bareland under 75% shading in central part of Korea were Styrax japonica, Styrax obassia, Smilax china, Callicarpa japonica, Stephanandra incisa, Viburnum dilatatum for. pilosulm, Magnolia sieboldii, Cornus kousa, Celastrus orbiculata, etc.. Especially, Magnolia sieboldii, Stephanandra incisa and Stryrax obassia were tolerant for forest-floor with hardened woil surface and Callicarpa japonica, Viburnum dilatatum for. pilosulum, Euonymus sieboldianus and Philadelphus schrenkii were suitable for softened soil surface with straw-mat mulching. 2. It is necessary to break seed dormancy to accelerate germination in case of Styrax obassia, Styrax japonica, Viburnum dilatatum for. pilosulum, Smilax china and Stephanandra incisa.

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Analgesic Effect of Styrax Japonica Pharmacopuncture on Formalin-Induced Pain in Rats (Formalin으로 유도된 통증모델에서 제돈과(齊墩果)약침의 진통효과)

  • Park, Mu Seob;Lee, Hyun Jong;Lee, Yun Kyu;Kim, Mu Ryeo;Park, Hae Jin;Kim, Jae Soo
    • Journal of Acupuncture Research
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    • v.33 no.2
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    • pp.97-108
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    • 2016
  • Objectives : This study was performed to investigate the analgesic effect of Styrax japonica pharmacopuncture on formalin induced pain in rats and to figure out efficient extraction method. Methods : The subjects were divided into 5 groups ; normal group(treated with normal saline at KI03, and injected normal saline at right hindpaw after 35 minutes), control group(treated with normal saline at KI03, and injected with formalin at right hindpaw after 35 minutes), water group(treated by hot water extraction pharmacopuncture at KI03, and injected with formalin at right hindpaw after 35 minutes), ethanol group(treated with ethanol extraction pharmacopuncture at KI03, and injected with formalin at right hindpaw after 35 minutes), and ultrasound group(treated with ultrasound extraction pharmacacupuncture and injected with fromalin formalin at right hindpaw after 35 minutes). We conducted a formalin test with ultrasonic vocalization( USV), and after the test checked for substance P, Aspartate aminotransferase(AST), and Alanine aminotransferase(ALT) concentration in the blood for each of the groups. Results : There was a significant analgesic effect of Styrax japonica pharmacopuncture in the early phase of the formalin test, and pharmacopuncture made with an ultrasound extracting method was observed to have a better analgesic effect than other extracting methods in early phases. The substance P concentration decreased significantly in the Styrax japonica pharmacopuncture treated group and no difference was found in the AST and ALT concentration of each group. Conclusion : These results demonstrated that Styrax japonica pharmacopuncture had analgesic effects in noxious nociceptors stimulation. Also pharmacopuncture made with an ultrasound extracting method had a better analgesic effect than others.

Pentacyclic Triterpenoids and Their Cytotoxicity from the Stem Bark of Styrax japonica S. et Z.

  • Kim, Mi-Ran;Lee, Hyang-Hee;Hahm, Kyung-Soo;Moon, Young-Hee;Woo, Eun-Rhan
    • Archives of Pharmacal Research
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    • v.27 no.3
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    • pp.283-286
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    • 2004
  • The methylene chloride soluble fraction of MeOH extract from the stem bark of Styrax japonica S. et Z. (Styracaceae) showed significant cytotoxicity by SRB method against five human tumor cell lines. Four known pentacyclic triterpenoids, oleanolic aldehyde acetate (1), erythrodiol-3-acetate (2), euphorginol (3), and anhydrosophoradiol -3-acetate (4) were isolated by activity-guided fractionation. Their structures were determined by chemical and spectral analysis. Compounds 1-4 were isolated from S. japonica for the first time.

Total Synthesis of a Demethoxy-egonol from Styrax obassia

  • Choi, Hong-Dae;Ha, Mun-Choun;Seo, Pil-Ja;Son, Byeng-Wha;Song, Jin-Cherl
    • Archives of Pharmacal Research
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    • v.23 no.5
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    • pp.438-440
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    • 2000
  • The total synthesis of a demethoxy-egonol isolated from Styrax obassia, 5-(3-hydroxypropyl)-2-(3',4'-methylenedioxyphenyl)benzofuran (9), is described. The key steps involve the construction of a 2-arylbenzofuran skeleton 7 from methyl 3-(4-hydroxyphenyl)propionate with 2-chloro-2-methylthio-(3',4'-methylenedioxy) acetophenone (6) in the presence of ZnCl$_2$ and successive desulfurization of the resulting product 7.

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Cytotoxic Activity of Styrax japonica S. et Z.

  • Kim, Mi-Ran;Lee, Hyang-Hee;Hahm, Kyung-Soo;Woo, Eun-Rhan
    • Proceedings of the PSK Conference
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    • 2003.10b
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    • pp.205.3-206
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    • 2003
  • The genus Styrax (Styracaceae) is different from other genera of this family due to the production of resinous material, usually secreted when the barks and trunks are injured by sharp objects. This resin, in the past considered a miraculous remedy in several parts of Asia and America, has been used in traditional medicine to treat inflammatory diseases. The CH$_2$Cl$_2$ fraction of Styrax japonica showed significant cytotoxic activities by SRB method against five human tumor cell lines (A549, HCT-15, MES-SA, SK-OV-3, and SK-MEL-2). (omitted)

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