• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.62-62
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• 2018

산꼬리풀(Veronica rotunda var. subintegra T.Yamaz.)은 다년생 초본류로 달성이라는 꽃말을 가진 우리나라에만 자생하는 특산식물이다. 줄기는 곧게 서며, 줄기 끝에 보라색의 꽃이 총상화서로 피어 관상가치도 우수하다. 또한, 전초를 일지향이라 불리우며, 중약대사전에는 천식과 기침, 감기, 기관지염 등에 효능이 있다고 보고되었다. 이러한 산꼬리풀의 육묘 체계의 확립을 위하여 2017년 6월 2일부터 7월 31일까지 약 8주간 육묘하였다. 종자 육묘기술 개발을 위한 공통조건은 200구 트레이에 원예상토를 충진한 다음 셀 당 4립씩 파종하여 55% 차광막이 설치된 배드에 배치하였으며, 이후 4, 6주차에 Hyponex $500mg{\cdot}L^{-1}$을 처리하였다. 토양실험은 원예상토 단용[$300-200-200mg{\cdot}L^{-1}$(N-P-K)], 피트모스:펄라이트(3:1) 및 코코피트:펄라이트(3:1) 혼용토를 사용하였다. 피트모스와 코코피트의 혼용토는 원예상토의 비료농도를 기준으로 0-0-0, 300-200-200, $600-400-400mg{\cdot}L^{-1}$의 비료를 첨가하였다. 파종 립수별 실험은 셀탕 1, 2, 4 및 6립으로 하였으며, 추비는 hyponex(6.5-6-19) 0, 500, $1000mg{\cdot}L^{-1}$를 증류수에 희석하여 2회 분무기로 살포하였다. 차광 실험은 0, 55, 75% 등의 차광막이 설치된 곳에서 수행하였다. 연구의 결과, 산꼬리풀의 육묘는 원예상토를 사용하는 것이 다른 토양에 비해 우수한 결과를 보였다. 초장, 경직경 및 엽수는 원예상토를 이용하는 것이 가장 효과적이었으며, 다음으로 피트모스:펄라이트 혼용토 순이었다. 근장의 경우, 피트모스 혼용토에서 비료 농도와 관계없이 원예상토에 비해 유의적으로 길었다. 파종립수에 따른 초장과 경직경은 1, 2립 파종구에서 가장 양호하였으며, 파종량이 적을수록 길고 굵어지는 경향이었다. 엽수도 셀 당 파종량이 적을수록 많아지는 경향이었으나, 유의적인 큰 차이는 확인되지 않았다. 추비는 지상부의 경우 hyponex $500mg{\cdot}L^{-1}$ 처리 시 생육의 증가 효과가 있었지만, 비교적 고농도인 $1000mg{\cdot}L^{-1}$ 처리구에서는 생육에 효과가 없거나 억제되는 결과를 보였다. 한편, 근장은 처리농도가 높을수록 증가하는 경향이었고, hyponex $1000mg{\cdot}L^{-1}$ 처리구(9.9 cm)에서 가장 길었다. 산꼬리풀의 유묘 재배 시 차광처리는 경직경과 근장을 감소시키는 결과를 보였으며, 초장과 엽수는 처리에 따른 유의적인 차이는 없었다.

• Journal of Korea Foresty Energy
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• v.25 no.2
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• pp.9-15
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• 2006

The quality of wood is largely depend on the characteristics of xylem tissue and their variation. They may include tracheid length, microfibril angle, distribution and amount of resin canal, as well as specific gravity as indicator of material properties. In this study, variation of these elements between and within 30 superior families of Pinus densifloa in progeny test forest were examined and the results are as follows; In terms of elongation ratio of tracheid length which is less than 1%, the sample tree showed a transition to matured wood after 13 years particularly in Kangwon 25, 30, 90, 56 and Chungnam 4 families. The average specific gravity were from 0.35 to 0.49, and differences between the families were significant. Number of transverse resin canal per unit area were also found to be significant between the families. The microfibril angles measured at 15th ring number ranged from 0.9 degree to 28.6 degree. More studies are necessary to tell whether these variation is inherited by genetic or individual characteristic. However it would be desirable that these elements be considered as key elements in the early stage of selection process of superior tree to ensure good quality of wood production in future.

• Journal of Korean Society of Forest Science
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• v.101 no.2
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• pp.175-184
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• 2012

This study was conducted to develop new mattress systems with vegetation base materials for protecting stream bank and rapid rehabilitation. Vegetation base materials are primarily compounded with fine soil, organic composts and peat moss as plant fibers, a water retainer and a soil improver. Peat moss can usually provide necessary natural fibers and organic materials in soil. Especially, peat moss can absorb up to 25 times its own weight in water and is therefore valued as a water retainer to prevent drying effect of vegetation base materials which can harm the growth of vegetation in mattresses. Normally mattress systems resist the lateral earth pressures or stream power by their own weight. Therefore, filled materials must have suitable weight, compressive strength and durability to resist the loading, as well as the effects of water and weathering. In this project, 100 to 200-mm clean, hard stones were basically specified, and about 50-mm rubbles were also used. Test application of new mattress system carried out in the stream bank of a small stream in the Gwangreung experimental forest, belonging to Korea Forest Research Institute (KFRI) in December 16th, 2006. As a result of the monitoring of vegetation coverage of test application plots (each plot size is 4 by 2 m), the coverage of all plots reached 100% in the end of May, 2007 (approximately 50 days passed after the first gemination of vegetation). The coverage of the plots using big hard stones and organic composts and the plots containing peat moss increased more rapidly. The results show that peat moss is effective to retain soil moisture and establish more sound environment for vegetation gemination.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.26 no.6
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• pp.215-219
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• 2016

Vanadium-doped SiC crystals have been grown by using a porous graphite inner crucible filled with vanadium carbide (VC) and by using a porous graphite plate and SiC + VC powders, respectively. Semi-insulating SiC crystals were grown onto the 6H-SiC seed crystals by PVT (Physical Vapor Transport) method. The grown crystals were indicated to be 6H-SiC polytype by XRD. As result of SIMS analysis, vanadium-rich precipitates were observed when the vanadium concentration was relatively higher than the maximum solubility of vanadium ($3-5{\times}10^{17}cm^{-3}$) in vanadium-doped SiC crystals, which resulted in degradation of crystal quality.

• Korean journal of applied entomology
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• v.4
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• pp.11-18
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• 1965

In order to investigate the fungicidal activities against various plant pathogenes, diminishing effect of plant transpiration, phytotoxicities, vapor effect and the rate of reduction by ultraviolet rays of phenylmercuric 8-oxyquinolinate(P.M.Q), this experiments were undertaken under various laboratory conditions. 1. Inhibitory activity on the spore germination of this chemical was shown less effective than that of P.M.A..(Table 2, Table 3, Table 4, Table 5 and Table 6) Also, P.M.Q. was resulted a somewhat higher inhibitory activity on the hyphae growth than P.M.A. (Table 7). 2. In the diminishing effect of plant transpiration, 8-hydroxyquinoline sulfate(oxine sulfate) was more strong inhibitory at first than P.M.Q., while, at last, P.M.Q. was more strong inhibitory in comparison with oxine sulfate(Table 8, Fig. 1 and Table 9). 3. P.M.Q. was shown less injury on the germination of rice plant seeds and the emergence of their roots than P.M. A.(Table 10). Injuries was not observed on the rice seedlings and soy-bean seedlings sprayed with 40 ppm of this chemical. 4. P.M.A. had more inhibitory effects on the mycelial growth of phytopathogenes than P.M.Q. on the vapor effect (Table 11, Fig. 2). 5. Biological activity and chemical decomposition rate of P.M.A. were greatly reduced by exposure of this compound to ultraviolet rays. But, P.M.Q. was only slightly affected by similar treatment(Table 12, Fig. 3, Table 13 and Fig. 4). From the above results, this chemical will be a promising fungicide adding fungitoxicities against various phytopatho genes, diminishing effect of plant transpiration and physico-stability.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.1
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• pp.1-8
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• 2009

This study was investigated to analyze the contents of flavonoid and polyphenol compounds, and inhibitory activities of tyrosinase and antioxidation to measure physiological effect of reflux water extraction (WE), reflux ethanol extraction (EE) and hot water extract under high pressure (HWE) of Torreya nucifera seed. HWE yields the highest contents of flavonoid compounds (176.34 mg/g) and polyphenol compounds (112.95 mg/g). The tyrosinase inhibitory rates were $5.62{\sim}28.71%$ at 2.0 mg/mL and HWE showed the highest inhibition rate. The nitrite scavenging abilities of all extracts were over 90% at pH 1.2 and 3.0 at the concentration of 2.0 mg/mL. The superoxide dismutase (SOD)-like activities of HWE was the highest value of 33.58%. The electron donating abilities (EDA) were $66.46{\sim}89.72%$ and HWE was the highest when the extracts were tested at 0.1 mg/mL. The EDA of all extracts were decreased with an increment of the extracts concentrations. The xanthine oxidase inhibitory rate of HWE was the highest value of 89.29% at the concentration of 2.0 mg/mL and the WE and HWE were over 75% rate of xanthine oxidase inhibition at 0.5 mg/mL.

• Journal of Mushroom
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• v.13 no.3
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• pp.250-255
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• 2015

In this study spent mushroom substrate has ingredient raising rice bed soil. spent mushroom substrates are organic content is 60.72% were nitrogen - phosphoric acid - potassium is 1.39 - 0.89 - 0.81% of the chemical characteristics determine. Post-harvested mushroom substrates of the stabilization process, the temperature of the 20 days time progress in the pH of the rise and fall of temperature down were germination index also 77, as identified, Spent mushroom substrate bed soil for raising rice Ingredient to take advantage of the 20 days or more stabilization process needed to be investigated. Rice seed germination characteristic is in the common bed soil for raising rice ingredients manufactured control group and the comparison in spent mushroom substrate is 10% or less of a mixed experimental population of the germination rate is 82% was more than average days to germination and germination energy, even a statistical significant difference is or control group than good level was ok. Growth initial also spent mushroom substrate is 10% or less of a mixed experimental population of shoot dry matter (top) and grave less than control group higher as confirmed spent mushroom substrates are bed soil for raising rice ingredients are likely to take advantage of the high, as was the judge.

• Ocean and Polar Research
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• v.27 no.1
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• pp.67-74
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• 2005

The phonology and reproductive effort of Zostera marina L. (Dongdae Bay and Aenggang Bay) on the southern coast of Korea were investigated from September 2002 to August 2003. The Dongdae Bay(DB) exhibited a finer sediment grain size with richer organic content than the Aenggang Bay(AB). Water temperature at DB site ranged from $7.5^{\circ}C$ in February to $25.5^{\circ}C$ in August, while water temperature at AB site ranged rrom $6.7^{\circ}C$ in February to $25.2^{\circ}C$ in september. Both populations exhibited a perennial lifB span, but the sexual reproductive effort was significantly higher at DB than AB. The reproductive shoots of DB site were developed from February to June 2003, while those of AB site from March to June 2003. At DB site, the frequency of reproductive shoot ranged from 11 to 33%, whereas reproductive shoot of AB did below 5%. Reproductive structures were larger and more abundant at DB, with the exception of number of fruits and seeds per spadix. Water temperature seems most important to regulate the timing of reproductive phase of Z. marina populations for two study sites.

• Journal of Bio-Environment Control
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• v.19 no.4
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• pp.246-250
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• 2010

This study was conducted to find out the propagation method of a rare variety Daphne kiusiana Miq. in Korea through softwood cuttings. Daphne kiusiana Miq are the evergreen broad leaf tree which have lived in the southern part of Korea. The flowering time of Daphne kiusiana Miq is early spring and the flower has an attractive fragrance. Generally, plants are dioecious and only the male plants are found in Korea. Propagation by seed is very difficult in this tree. Softwood cuttings were taken to establish an efficient propagation method in Daphne kiusiana Miq Cuttings were grown in perlite:vermiculite (1 : 1), perlite, vermiculite, sand rooting media under shaded greenhouses during summer in 2007. The rooting rates of cuttings were 86.7%, 95%, 75% and 95% in perlite:vermiculite (1 : 1), perlite, vermiculite and sand media, respectively. Softwood cuttings taken on July and rooting at $27^{\circ}C$ were significantly improved the growth and rooting rates. Softwood cutting can be an effective means of propagation in Daphne kiusiana Miq.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.15 no.2
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• pp.127-135
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• 2020

The purpose of this paper is to classify individual startups by growth stage based on data-based quantitative criteria. This is to provide a basis for systematic support for government startups based on accurate statistics on the startup growth process. This startups were the TIPS (Tech Incubator Program for Startup) support company, which used a relatively reliable startup. We found seed money to complete MVP (Minimum Viable Product) within 1.5 years after establishment, verified PMF (Product-Market Fit) within 1 year, attracted Series A investment within 2.5 years after establishment, and successfully commercialized it. It attracted Series B investment for stable growth within 1.5 years (Series B investment within 4 years from start-up). The results of the study, the division of government programs that support stage-based startup commercialization, that is, within three years and within seven years of establishment, is significant to date. Three directions are suggested for future research. First, develop indicators for monitoring startup growth stages. Second, it continuously updates the annual changes and tracks the growth stages of individual startups. Third, we discover the successful growth law of technology-based startups by applying in-depth case analysis of successful startups to the model.