• Journal of the Korean Applied Science and Technology
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• v.37 no.6
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• pp.1496-1506
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• 2020

This study was conducted as follows in order to find out the possibility of using (Chamaecyparis obtusa) by part as a cosmetic material. Chamaecyparis obtusa was separated leaves, bark, wood, and root, and extracted with 99.9% ethanol, and the antioxidant and whitening effects of the sample were confirmed. For this, the following studies were conducted. Antioxidant evaluation was confirmed by 1 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, 2 2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS+) radical scavenging activity. To evaluate the whitening effect, mushroom tyrosinase inhibitory activity evaluation and cytotoxicity evaluation of Chamaecyparis obtusa extract through MTT assay were conducted, and cellular tyrosinase inhibition rate was measured and melanin contents was confirmed. As a result of antioxidant activity, Bark extract among Chamaecyparis obtusa parts showed the best efficacy, and bark in B16F10 melanoma cell showed tyrosinase activity inhibition and melanin contents inhibitory effects. Therefore, it was confirmed that the ethanol extract of Chamaecyparis obtusa was developed as a natural material for safe and excellent whitening functional cosmetics.

• Journal of Forest and Environmental Science
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• v.32 no.3
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• pp.291-301
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• 2016

One of the most concerned topics in ecology is the relationship between biodiversity and ecosystem functioning. However, there are few field studies, carried out in forests, although many studies have been done in controlled experiments in grasslands. In this paper, we describe the relationship pattern between three facets of diversity and productivity at Ratargul Fresh Water Swamp Forest (RFWSF) in Bangladesh, which is the only remaining fresh water swamp forest of the country. Sixty sample plots were selected from RFWSF and included six functional traits including leaf area (LA), specific leaf area (SLA), leaf dry matter content (LDMC), tree height, bark thickness and wood density. In analyzing TD, we used Shannon diversity and richness indices, functional diversity was measured by Rao's quadratic entropy (Rao 1982) and Faith's (1992) index was used for phylogenetic diversity (PD). It was found that, TD, FD and PD were positively related with productivity (basal area) due to resource use complementarity but surprisingly the best predictor of tree productivity was FD. The results contribute to the understanding the effects of biodiversity loss and it is essential for conservation decision-making and policy-making of Ratargul Fresh Water Swamp Forest.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.3
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• pp.463-468
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• 2004

This study was conducted to determine the antimicrobial effect of leaf, bark and xylem of 6 kinds of Quercus spp. against food borne disease bacteria. All of the samples tested showed the antimicrobial effect against food borne disease bacteria. Bacillus cereus, Listeria monocytogenes, and Staphylococcus aureus was more sensitive than gram negative bacteria such as Salmonella typhimurium and Escerichia coli O157:H7, but no antimicrobial activity was observed against yeast and molds. Based on antimicrobial activity for kinds of Quercus spp., the antimicrobial activities of Quercus aliena Blume, Quercus mongolica Fisch, and Quercus dentata Thunb were stronger than those of Quercus variebilis Blume, Quercus serrata Thunb, and Quercus acutissima Carruth. In the meantime, the ethanol extract of Quercus spp. leaves showed the strongest antimicrobial activity compared to that of bark and xylem. Especially, the ethanol extract of Quercus aliena Blume leaf showed the strongest antimicrobial effect against foodborne disease bacteria among 6 kinds of Quercus spp.

• Horticultural Science & Technology
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• v.33 no.5
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• pp.658-667
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• 2015

This research was conducted to investigate the influence of various levels of fused superphosphate as pre-planting fertilizer on the growth of red-leaf lettuce and changes in the chemical properties of the soil solution in three root media, namely coir-dust plus expanded rice hull (8:2, v/v; CD+ERH), carbonized rice hull (6:4; CD+CRH), or ground and aged pine bark (8:2; CD+GAPB). The amounts of fused superphosphate (FSP) incorporated into the three root media during formulation were controlled from 0 to $6.0g{\cdot}L^{-1}$ in $1.5g{\cdot}L^{-1}$ increments. The root media containing fertilizers were packed into 300 mL plastic pots and seedlings of red-leaf lettuce at the 3rd leaf stage were transplanted. After transplanting, the crops were fed with a solution of neutral fertilizer ($100mg{\cdot}L^{-1}$). The growth of red-leaf lettuce was investigated 5 weeks after transplanting and soil solutions were extracted and analyzed every week for pH, EC, and concentrations of macro-nutrients. The elevation of application rates of FSP in the three root media resulted in better growth, and the crops grown in CD+ERH and CD+GRPB had greater fresh and dry weights than those in CD+CRH when compared among the treatments of equal amounts of FSP. The pH and $PO_4{^{-3}}$ concentrations in the soil solution of CD+CRH at 3 weeks after transplant were in the ranges of 4.0 to 4.8 and 20 to $100mg{\cdot}L^{-1}$, respectively. These were lower pH and higher $PO_4{^{-3}}$ concentrations than those in CD+ERH and CD+GAPB. The $K^+$ concentrations were higher in CD+CRH than those in the other two root media, and the elevation of FSP application rates resulted in higher $Ca^{+2}$, $Mg^{+2}$ and $SO_4{^{-2}}$ concentrations in soil solution of the three root media. The $NO_3$-N concentrations in soil solution rose continuously during crop cultivation, implying that the leaching percentage was elevated. The soil solution EC varied, showing the same tendencies as the $NO_3$-N concentrations. The above results indicated that the CD+ERH and CD+GRPB media performed better than CD+CRH, and optimum application rates of FSP in the three root media were 4.5 to $6.0g{\cdot}L^{-1}$ for pot cultivation of red-leaf lettuce.

• Journal of agriculture & life science
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• v.45 no.2
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• pp.15-20
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• 2011

This study was conducted to estimate the aboveground biomass and net primary production of 40 year old Pinus rigida forest in Sancheong, Gyeongnam province. The aboveground biomass was $127.7Mg\;ha^{-1}$ and $103.1Mg\;ha^{-1}$ of which were found from stem, $17.2Mg\;ha^{-1}$ from branch and $7.4Mg\;ha^{-1}$ from leaf. Biomass distribution ratio of Pinus rigida stands showed the highest in stem wood with 71.1%, followed by the branch with 13.5%, stem bark with 9.6% and lastly the leaf with 5.8%. Net primary production of aboveground biomass was $10.4Mg\;ha^{-1}$ and $3.6Mg\;ha^{-1}$ were found from stem, $2.2Mg\;ha^{-1}$ from branch, $1.3Mg\;ha^{-1}$ from twig and $2.8Mg\;ha^{-1}$ from leaf. Net primary production distribution ratio of Pinus rigida was 34.6% on stem wood, 26.9 on leaf, 21.2% on branch, 12.5% on twig and 4.8% on stem bark.

• Current Research on Agriculture and Life Sciences
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• v.11
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• pp.25-30
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• 1993

The buds of Hayward/Bruno tree were damaged from $-7^{\circ}C$ but serious damage was found on the buds treated at $-15^{\circ}C$ and $19^{\circ}C$. The bark tissue was more suceptible to low temperature than the bud. The trees were survived and bursted their at all on the top of the graft union and new shoots were formed from the rootstock of the tree. Yellowish area on the leaf surface was found, which is believed that as a result of low temperature. From these, the kiwifruit trees must be grafted with cold tolerant rootstocks will be clarified in future.

• Journal of Sericultural and Entomological Science
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• v.31 no.1
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• pp.12-19
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• 1989

Experiments were conducted to investigate the optimum season for mulberry graftages harvesting before the period of natural leaf fall in autumn. Harvesting season was examined at 10 days intervals from September 30 to November 20, 1985 and 1986, at nine sites in eight provinces. The results were : 1. Diameter of graftages increased until October 30. 2. Early harvest of graftages decreased survived rate, number of shoots, and total shoot length the next spring. The October 30 harvest yielded the best growth the following spring. 3. Harvests after October 20 allowed for good survial of mulberry shoots and sprouting the following spring. 4. Total N and P in plants increased with late harvests, K decreased, and Ca content was not affected by harvest date. 5. Total N, P, and Ca were higher in stem cortex than root bark, while K appeared to be equally distributed between root and shoot bark.

• Journal of Korea Foresty Energy
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• v.19 no.1
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• pp.13-19
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• 2000

This study was aimed to investigate the effect of several stimulatory trements of flower and seed growth on the reproductive and vegetative growth of Tilia amurensis RUBP. The effects of mounded planting, girdling, root-pruning, bending and foliar fertilizer application on the fifteen to forty yead-old tress growing in the experimental plantation at the Konkuk University and the National forest at the Daegwanryung were measured. The following results were obtained: (1) The number and the longitydinal growth of internode were reduced by the treatments. The xylem growth of the longitudited more greatly than the bark growth by all the treatments. (2)The increasong rate of the brand angle as compared to that of the control was 2.11% in the girdling treatment, 31.61% in the mounded planting treatment, and 22.14% in root-pruning treatment. (3) The foliar application of fertilizer(N, P, K, and B) before flowering increased leaf and stem growth, that one after pollen fertilization increased the fruit growth. (4)The foliar application of fertilizer before flowering increased the xylem growth while that after pollen fertilization increased the bark growth. (5)The stimulatory effects of root pruning and branch bending on the flowering and seed growth were shown relatively less than that of mounded planting. The effect of the moinded planting on the yield of the seeds has remained continuously every year since planting the trees.

• Korean Journal of Oriental Medicine
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• v.13 no.2 s.20
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• pp.27-36
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• 2007

Hibiscus syriacus is rarely used herb. For finding up new applications of this herb, the medicinal parts and expected efficacys that recorded in 24 classics of oriental medicine were inquired. As a result of the literature review, medicinal parts and expected efficacys of Hibiscus syriacus were as follows: The medicinal parts were mainly flower and bark. But the root, branch, leaf and fruit were mentioned too. Some unidentified medicinal parts seemed to be branch or bark. The mentioned symptoms that prescribed Hibiscus syriacus are intestinal 'wind', red-white dysentery, thirst with fever after dysentery, insomnia, 'wind' syndrom, leukorrhea, regurgitation, etc. And this herb was mentioned that applied externally for scabies, hemorrhoids, prolapse of the rectum, headache, extracted tooth, etc. Therefore, bleeding intestinal diseases, insomnia, vaginal or uterine hemorrhage(for internal use), scabies or mycosis, hemorrhoids. anal fistula, prolapse of the rectum, headache(for external use) were presented as expected efficacys of Hibiscus syriacus. In future, studies for verifying the efficacys are needed.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.31 no.1 s.49
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• pp.121-125
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• 2005

Most of the cells, specially in the skin, free radicals and reactive oxygen species induced aging, accompanying with diseases. The pinaceae family is very familiar plant with Korean spirit. However, those plants were not estimated for natural products in manufactural process. We employed 4 different plants, Pinus koraienis S et Z. Pinus banksiana LAMBERT. Pinus rigida MILL. Pinus densiflora S. et Z. in pinceae family. The ethanol extracts were prepared for three different parts of plant, wood, bark and leaf, respectively. In this study, we carried out free radical and superoxide radical scavenging assay to investigate the anti-oxidative activity The bark and leaf part of plants showed similar anti-oxidant effect. L-ascorbic acid and $\alpha$-tocopherol at $10{\mu}g/mL$. Also we tried to investigate inhibitory effects of elastase activity in in vitro experiments on pinaceae plant extract as a matters for functional cosmetics. Among those plants, the bark of Pinus rigida MILL. and Pinus densiflora S. et Z. showed inhibitory effect. The cell viability was evaluated with MTT assay. The potential relationship was shown between the cell viability and anti-oxidant effect because the anti-oxidant effects were positively correlated wvith the cell growth in MTT assay. As the results in our experiments, we expect the potential activities of pinaceae as a material of functional cosmetics.