• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.82-82
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• 2019

황해쑥(Artemisia argyi Lev. et. Vnt)은 국화과의 다년생 초본 식물로서 쑥, 산쑥과 함께 건조한 것이 애엽이라는 생약재로 쓰이며 2016년 기준 전국적으로 81 ha에서 871톤이 생산되고 있다. 주요 유효성분으로 Eupatilin, Jaceosidin 등이 있으며 위궤양에 효과가 있다고 알려져 있어 최근에는 스티렌정 등 신약원료로 각광 받고 있다. 황해쑥은 종자번식 뿐만 아니라 포복경을 이용한 영양번식이 가능하며 현재까지 '섬애' 등 1품종이 개발되어 있으나 농가와 산업체가 요구하고 있는 수량성 또는 Eupatilin 등 성분함량이 높은 품종개발이 필요하다. 국내 연구 결과를 보면 대부분 년 1회 수확을 기준으로 연구되어 왔으나 실제로는 년 2회 수확하는 경우가 더 많다. 따라서 본 실험에서는 년 1회 뿐만 아니라 년 2회로도 수확하여 조사하였다. 시험재료는 AA1801 등 7계통 이며, 시비량은 10 a 당 질소 15.3 kg 인산 20 kg 가리 5 kg이고, 흑색 비닐을 피복한 후 조간 30 cm 주간 15 cm로 하였다. 시험구배치는 난괴법 3반복으로 하였으며 포복경을 5 cm로 잘라 4월 19일에 정식하였다. 1회 수확 시에는 8월 12일, 2회 수확 시에는 6월 17일, 9월 19일에 수확 하였다. 년 1회 수확 시 계통 별 생육특성을 보면, 초장은 202.4~231.5 cm로 평균 213.6 cm 였으며 경경은 10~12.14 mm로 평균 10.9 mm 였다. 분지수는 32.6~37.3개로 평균 35.2개 였으며 엽병장, 엽장, 엽폭은 2.4~4.2 cm, 9.3~12 cm 9.2~12.2 cm로 평균 3.3 cm, 10.7 cm 그리고 10.9 cm 였다. 전초의 생중량과 건중량은 각각 4.9~6.9 kg, 1.8~2.7 kg로 평균 5.5 kg, 2.1 kg 이였다. 특히 AA1902는 다른 계통에 비해 분지수는 적었으나 초장이 크고 경경이 굵었으며 생중량과 건중량도 가장 무거웠다. 년 2회 수확 시 전초의 생중량과 건중량은 각각 5.1~6.2 kg, 1.7~2.0 kg로 평균 5.6 kg, 1.8 kg 이였다. 수량성으로 봤을때는 AA1902는 1회 수확에 적합하며 AA1801, AA1802는 2회 수확 시 생중량과 건중량이 무거웠다. 또한 AA1903의 경우 수확 회수와 상관없이 수량성이 높은 계통으로 판단되었다. 본 자료는 황해쑥 품종육성의 기초자료로 활용하고자 한다.

• The Korean Journal of Zoology
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• v.27 no.1
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• pp.25-34
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• 1984

Two species of fishes of Genus Liobagrus that had been collected from three separate river systems in Korea were compared by their morphology and gel electrophoretic patterns of water soluble proteins. In morphology L. andersoni from Han River was distinctly different from L. mediadiposalis collected from both Gum River and Nagdong River. But L. andersoni collected from Gum River not only showed partial similarity for both groups of fishes above in their classifying characteristics but also had a unique ratio of body width/standard length. Comparable similarity and difference among the three groups were also noted in their protein patterns of SDS polyacrylamide gel electrophoresis of various tissues. The difference was clearer and more distinct in the gel run with muscle proteins. A couple of more distinctly different low molecular polypeptides were detected by two dimensional gel electrophoresis. Since the protein patterns shown in this study are not only agreeable with the morphological results but also provide detailed comparisons, fishes of Liobagrus from various water sources can be classified reliably by gel electrophoresis. On the bases of tghe findings above, L. andersoni like fishes collected from Gum River should no longer be classified as L. andersoni. Before naming them as an independent species, the possibility of natural hybrid between the two defined species, or of a varient of L. andersoni by geograpic isolation should be tested.

• Food Science and Preservation
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• v.17 no.5
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• pp.571-580
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• 2010

We sought to define the main motivational factors promoting consumption of Prunus mume products. We surveyed both specialized high-volume consumers and public consumers, and focused on consumption of and preferences for Prunus mume and Prunus mume products. We investigated how products were preferentially consumed, purchase experience, purchase location, purchase price, consumption experience, factors important in a purchase decision, preference factors, dissatisfaction factors, consumption outlook, comments on new processed foods, and activation of consumption. A total of 534 responses were received and data were analyzed using the SAS program (Version 9.1) of the Frequency test; Chi-square test was used to detect significant factors. A greater percentage of high-volume(compared with low-volume) consumers processed personal products at home. The public consumer tended to buy commercial products. However, public consumers who were older, who had higher incomes, and who were heads of households, tended to both buy commercial products and to prepare foods at home. The common purchase methods used by high-volume consumers were internet and direct marketing, but the public consumer frequented department stores and hypermarkets. High-volume consumers observed that commercial products were expensive, and such consumers seemed to be particularly cost-sensitive. The decisive factor triggering purchase decisions in high-volume consumers was the geographical origin of the fruit, whereas the public consumer was more concerned with taste. In public, positive factors were that the product was good for health and had a pleasant taste. Some of those surveyed complained of a lack of variety in Prunus mume products and that the amount of Prunus mume in certain products was low. To promote and increase consumption, convenient-to-eat products with healthy images are needed.

• Korean Journal of Soil Science and Fertilizer
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• v.4 no.1
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• pp.41-48
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• 1971

For increasing Productivity of Nutri-irrigation culture used liquified fertilizer in sandy land, the effect of Ca etc. on growth and roat system of crop (radish) was studied. Results are as follows. 1) High level of Ca in irrigated nutrient solution promoted growth of radish, especially, growth of underground part and increased yield on sand media than low level of Ca. 2) High level of cation promoted also growth of radish compared with control though less than high level of Ca do. 3) Promoted growth in high level of Ca and cation acompanied larger attachment of sand grain to root system making good condition for absorption. 4) Higher content of Ca in fibrous roots and attached sand grains compared with thickend root and other sand media (especially, in higher level of Ca), suggest a specific roll of Ca on the in teraction between roots and media constituting a root environment for productivity. 5) The content of Ca, Mg, Mn, in tops are manifestly higher than underground part while no dislinct differences are found between tops and underground parts in N.P.K.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.2
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• pp.307-313
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• 2022

As the development of renewable energy expands internationally to cope with global warming and climate change, the share of wind power generation has been gradually increasing. Although wind farms can produce electric power for 24 h a day compared to solar power plants, Their interfere with the operation of nearby radars or communication equipment must be analyzed because large-scale wind power turbines are installed. This study analyzed whether a land radio station can receive sufficient signals when a ship sailing outside the offshore wind farm transmits distress signals on the VHF band. Based on the geographic information system digital map around the target area, wind turbine CAD model, and wind farm layout, the area of interest and wind farm were modeled to enable numerical analysis. Among the high frequency analysis techniques suitable for radio wave analysis in a wide area, a dedicated program applying physical optics (PO) and shooting and bouncing ray (SBR) techniques were used. Consequently, the land radio station could receive the electromagnetic field above the threshold of the VHF receiver when a ship outside the offshore wind farm transmitted a distress communication signal. When the line of sight between the ships and the land station are completely blocked, the strength of the received field decreases, but it is still above the threshold. Hence, although a wind farm is a huge complex, a land station can receive the electromagnetic field from the ship's VHF transmitter because the wave length of the VHF band is sufficiently long to have effects such as diffraction or reflection.

• Korean Journal of Soil Science and Fertilizer
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• v.8 no.3
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• pp.121-133
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• 1975

Soils of the agricultural land derived mostly from volcanic ash in Jeju island may be characterized by relatively high PH, high contents of organic matter and exchangeable bases, and significantly low content of available phosphorus. The PH, organic matter, and available phosphorus of the soils in northern Jeju are 6.1, 12.6%, and 23 ppm, while those of the soils in the southern Jeju are 6.4, 3.7 %, and 76 ppm respectively. Upland soils in Jeju may be classified into 4 groups on the basis of soil fertility: black soil, very dark brown soil, dark brown, and red yellow soil. The organic matter content of black soil, very dark soil and dark brown soil is 15%, 7%, and 3% respectively. The soils of high organic matter content show the high phosphorus absorption coefficient, low content of available phosphorus, and low degree of the base saturation. The soil productivity for barley in the northern Jeju is higher than that in the southern Jeju and the productivity in the western Jeju is higher than that in the eastern part. The productivity for barley is in decreasing order of dark brown soil, very dark brown soil and black soil. Yields of potato and sweet potato in Jeju are higher than in the mainland. Those crops are considered to be tolerant to aluminumtoxicity. The response of sweet potato to nitrogen, phosphorus, and potassium in Jeju soils is lower than that in the mainland, while the response of barley and rape to nitrogen and phosphorus is higher than that in the mainland. The response to fertilizer applied is greater in the northern Jeju than in the southern Jeju. Lime requirement for the Jeju soils calculated on the basis of laboratory tests is so tremendous that single application of lime required might induce adverse effect. Most of the phosphorus applied to the Jeju soils is readily fixed as unavailable form and application of phosphorus in the level of 30 to 40 kg/10a is thought to give little effect.

• Childhood Kidney Diseases
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• v.6 no.1
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• pp.68-74
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• 2002

Purpose: Suprapubic bladder aspiration(SBA) of urine is the most reliable method to obtain urine avoiding contamination in non-toilet trained infants. Ultrasonography is a useful tool for guiding the anatomic location as well as for direct visualization during procedure. We evaluated the success rate and complication of ultrasound(US) assisted SBA Methods. Sixty infants who visited Ewha Womans University Mokdong Hospital, with suspected urinary tract infection were randomly divided into the US assisted (n=32) and blind SBA(control, n=28) group. In US assisted SBA group, the anteroposterior(AP), transverse, and sagittal diameters and the volume of the bladder were measured. In the blind SBA group, urine was blindly aspirated when the urinary bladder was palpated at the suprapubic area. The rate of successful urine aspiration, the number of attempts until successful aspiration, aspirated urine volume were compared between the two groups. Results: The success rate was $100\%$(32/32) in the US assisted group, which was significantly higher than $85.7\%$(24/28) of the control group (P<0.05). The aspirated urine volume in the US assisted group was $7.4{\pm}3.7\;mL$, which was significantly higher than $4.5{\pm}3.4\;mL$ of the control group (P<0.05), The diameters and volume of bladder in successful aspiration were $2.1{\pm}0.7\;cm$ in AP diameter, $3.1{\pm}0.6\;cm$ in transverse diameter, $4.2{\pm}1.0\;cm$ in sagittal diameter and $15.2{\pm}10.4\;mL$ in volume, which were significantly higher than those ($1.7{\pm}0.3\;cm,\;1.7{\pm}0.3\;cm,\;1.8{\pm}0.7\;cm,\;2.4{\pm]0.6\;cm,\;3.9{\pm}2.5$) of the control group (P<0.05) The correlations between the AP(r=0.78), transverse (r=0.72), sagittal(r=0.91) diameter and bladder volume were significant (P<0.05). SBA was $100\%$ successful in the AP diameter >3 cm, transverse diameter >4 cm, depth >4 cm and bladder volume >5 mL. Conclusion: US assistance can significantly improve the success rate of SBA in infant with suspected urinary tract infection. (J Korean Soc Pediatr Nephrol 2002 ; 6 : 68-74)

• Korean Journal of Soil Science and Fertilizer
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• v.11 no.1
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• pp.43-50
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• 1978

In order to compare the effectiveness of different phosphorus forms (pulverized as regranulized) and formulars (compound fertilizers) of fused phosphate and to compare the effectiveness of boron from different forms (straight borax, granulized with fused phosphate and included in compound fertilizer), a field experiment was conducted on a relatively fertile upland soil using soybean as a test crop. Results are summarized as following. 1. Yield of soybean was significantly higher in the plots fertilized with P when compared to check plot (no p). However, no significant differences were observed among the different forms or formulars of fused phosphate, indicating that the regranulization or formulation of compound fertilizer did not influence the effectiveness of phosphorus. 2. The application of boron, regardless of its formular, brought about higher B content in plant tissue and higher grain yield. There was a tendency that boron contained in ragranulized fused phosphate was more effective than straight borax. The results also indicated that when boron is to be included in NPK compound fertilizer, its content should be at the least 1.5% as $B_2O_3$. 3. The effectiveness of boron appeared as increased number of pod, higher B, and Ca contents in plant and the amounts of uptake of these elements by soybean. 4. The analysis of soil after the experiment indicated that different forms or formulars of fused phosphate were similarly effective in increasing the available P, Ca, and Mg contents in the soil. 5. Slight increase in available B contents in the experimental plot soils applied with boron fertilizer was observed after the trial.

• Journal of Distribution Science
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• v.10 no.3
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• pp.15-30
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• 2012

It has been 10 years since the facility modernization projects of traditional markets was rigorously undertaken. Although more than 835 traditional Korean markets nationwide have already completed these projects, there does not exist a specific set of standards of installation, future maintenance, and management. As a result, the complaints made by civil stakeholders in accordance of the actual facility installation caused problems and delays of related projects. In addition, while some local governments secured and implemented their own differing standards, others have not yet established their own separate standards for maintenance and management. Specifically, 694 traditional markets nationwide were supported for the cost of installing arcades by 2010. For the short period of time after the arcade-supported projects were deployed, the number of the traditional markets had been rapidly growing as a prime example of the facility modernization projects. The arcade facilities are being planned and installed merely for screening the rain or the sun. Without fundamental data for the newly landscaped environments or information on the actual conditions of usage and assessment, there is a lack of comprehensive approaches that could possibly organize the public environments. Furthermore, the amount of support needed for repairs, maintenance, and management from the central and local governments is gradually increasing. Thus, it becomes both crucial and necessary to complement the current set of standards. The purpose of this study is to examine the actual conditions of usage, maintenance, and management among those traditional market facilities that were installed with the supports of the facility-modernization projects, especially for arcades. This will be carried out through investigating the local problems, issues, and considering international case studies. The results of this study will provide measures for effective and efficient installation and management of traditional market arcades. Improvements in the use of public resources could be directed towards transforming public business, as well as public enhancement and functional maintenance and reinforcement. Under this condition, the arcade is not a simple area to avoid rain or sunlight; it becomes a public space. It is highlighted that the arcade should establish its public business not only to activate markets but also to refine street environments and revitalize local communities. A more specific way to improve is introduced through systematic supplementation. This is needed to attract effective participation from local residents and is done so by conducting a fair procedure from the first stage of business and by providing guidelines for establishing arcades as public facilities. The study points out to the problem of merchants-centered plans and street use. It presents the need to expand to involve residents and customers. Given that the arcade is a public facility and merchants' ability to maintain it is limited, manuals and systems for its maintenance needs to be introduced through multi-party agreement of merchants, government, residents and customers.

• Korean Journal of Soil Science and Fertilizer
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• v.19 no.1
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• pp.25-31
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• 1986

This study was conducted to determine the effects of 5 years continuous application of compost and rice straw with the different rates of nitrogen fertilizer on physico-chemical properties of paddy soils and yield of rice. The results obtained were as follows; 1. The yield of rice was 7 and 4% higher at straw and compost treatment compared to the non-application of organic matter. The rate of yield response for nitrogen fertilizer was lowered as the amount of nitrogen application increased under the condition of organic matter application. 2. Dry mayer weight and total nitrogen content of rice plants were increased in the order of straw > compost > non-application of organic matter. Above two factors were positive correlations with yield but total nitrogen content was negative correlation with ripening rate. 3. $NH_4-N$ in the soil was higher at plot applicated with compost and straw than non-application. It was positive correlation ($r=0.62^*-0.79^{**}$) with total nitrogen content in rice plants from 15 days after transplanting to heading stage. 4. The physical properties of soil, hardness and infilteration rate, after 5 years experiment, were improved in the order of straw > compost > non-application of organic matter. Organic matter content in the soil was decreased 0.1% on the straw treatment after 4 years, 0.1% on the compost after 3 and 4 years, and 0.1% on the non-application every years.