• 한국약용작물학회지
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• 제25권2호
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• pp.115-120
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• 2017

Background: The study aimed to obtain data on the effects of cultivation and soil reduction of green manure crop on the quantity and quality of organically cultivated Cynanchum wilfordii Hemsley. Methods and Results: The experiment comprised four treatments: control, hairy vetch, barley, and hairy vetch + barley (3 : 2). The plant height in the hairy vetch treatment (86.3 cm) was significantly different from that in the other treatments, whereas the stem diameter leaf area, and special product analysis division (SPAD) value did not differ across the treatments. The largest soil reduction of green manure crop was recorded in the barley treatment (440 kg/10 a), whereas the smallest was recorded in the single treatment with hairy vetch (80 kg/10 a). The hairy vetch + barley (60 : 40) treatment showed 63% more soil microorganisms than control. Radical scavenging activity estimation revealed that the total polyphenol content was highest (1,740 mg/kg), and the 2,2-diphenyl-1-picrylhydrazyl (DPPH) was 92.6% in the barley treatment. The 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) activation was highest in the control (51.1%), and the root yield was the highest in the barley treatment (310 kg/10 a). Conclusions: The root yield, total polyphenol content, and antioxidant activity of Cynanchum wilfordii (Maxim.) Hemsley increased in presence of the green manure crop barley.

• 한국자원식물학회지
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• 제20권2호
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• pp.129-132
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• 2007

삼백초 1회 수확 후 질소 추비량에 따른 생육 및 수량을 검토하여 재배법 확립의 기초자료를 제공하고자, 무시용 등 4처리를 두어 2002년부터 3년간 시험한 결과, 초장, 엽의 크기, 경태, 절수, 상품엽수, 분얼수 등 경엽과 근경의 생육은 1차 수확 후 질소 추비량이 많을수록 길거나, 굵거나, 많은 경향으로 양호하였다. 경엽수량은 질소 추비량이 많을수록 증가되어 무시용 158kg/10a 대비 3, 6, 9kg/10a 사용 시 각각 20%, 42%, 60% 증수되었고, 성분함량 중 rutin은 질소 추비 사용량이 많을수록 증가되는 경향이었으며, quercitrin은 질소 추비 3kg/10a 시용에서 다소 높았다.

• 한국자원식물학회지
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• 제20권2호
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• pp.125-128
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• 2007

최대 엽 수량 증대를 위한 1회 수확부위를 구명하여 안정생산을 도모코자 지제부 수확 등 4처리를 두어 2002년부터 3년간 시험한 결과, 경엽과 근경 생육은 1회 수확높이가 짧을수록 양호한 경향이었으나, 분얼수는 길수록 많았으며, 근경의 분포는 직경 5mm 이하가 58% 정도며, 수확높이가 짧을수록 굵은 근경의 비율이 높은 경향이었다. 경엽수량은 지상부에서 수확높이가 짧을수록 많아 5cm수확(관행) 10a당 292kg 대비 지제부 수확에서 15% 증수되었고, 경엽 수확 후 건조 전 조제시간은 수확높이가 낮을수록 단축되었으며, 5cm 수확(관행) 대비 지제부 수확에서 30% 절감되었다.

• KSBB Journal
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• 제28권5호
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• pp.319-326
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• 2013

This study was carried out to investigate the in vitro and in vivo moisturizing properties and percutaneous absorption of PEG-impregnated Aloe vera gel. The PEG-i-Aloe gel was obtained from dewatering and impregnation by soaking (DIS) of Aloe vera leaf slice. The moisturizing property of the obtained sample was evaluated by moisture determination using gravimetric method in desiccator under different RH% and by water sorption-desorption test on human skin. The transdermal penetration characteristics of PEG-i-Aloe gel was investigated by Franz diffusion cell in vitro transdermal absorption method. PEG-i-Aloe gel had high moisture retention ability and could significantly lead the enhancing skin hydration status as well as reducing the skin water loss due to the film formation as a skin barrier. The skin penetration rate of PEGi- Aloe gel at steady state was 9.76 ${\mu}g/(h{\cdot}cm^2)$ and the quantity of the transdermal absorption was 144 ${\mu}g/cm^2$ in 9 hr. The penetration mechanism was well fitted with Higuchi model ($R^2$ = 0.974-0.994). The results show that PEG-i-Aloe gel has the significant moisturizing effect and strong penetration of the animal skin. It could be used as the moisturizing additive in cosmetic skin products.

• 한국잡초학회지
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• 제32권3호
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• pp.230-239
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• 2012

Coconut (Cocos nucifera L) is one of the predominant plantation crops in Sri Lankan economy which is known to have existed for over thousands of years. During the past decades coconut production had been reduced by a significant quantity. The usage of poor quality planting materials is a major reason for the low coconut production. Thus much attention needs to be paid in coconut nurseries. Weed management is a critical management practice in the nursery. Though glyphosate application is becoming popular in nurseries it can affect weeds as well as coconut seedlings growth. Therefore the effects of glyphosate were evaluated by determining the growth of shoot and root of coconut seedlings. Poly bag nursery was prepared and three treatments were used. Treatments were no glyphosate and manual weeding ($T_1$), application of glyphosate 1.08 ai kg $ha^{-1}$ at 2 monthly interval ($T_2$) and application of glyphosate 1.44 ai kg $ha^{-1}$ at 2 monthly interval ($T_3$). Application of glyphosate at early stage of seedling growth had a no significant effect on growth parameters tested. However, the concentrations of glyphosate negatively affected numbers, volumes and dry weights of secondary, tertiary and quaternary roots at the latter stage of seedling growth. The leaf area and the height of seedling were significantly reduced by the highest concentration of glyphosate. Among the growth parameters tested, seedling girth and shoot dry weight were not affected by the application of glyphosate. These results revealed that the usage of glyphosate at both concentrations negatively affected root growth of coconut seedlings. Based on these results, the both concentration levels of glyphosate should be applied to coconut nurseries before sprouting the seed nuts.

• 생물환경조절학회지
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• 제13권3호
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• pp.156-161
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• 2004

시설참외 재배지 연작장해 경감을 위한 객토시 토성이 생육과 과실의 품질 및 수량에 미치는 영향을 조사하였다. 객토시 기존 작토층에 함유된 유ㆍ무기물질들은 교반으로 감소되었고, 토양수분 장력은 점토함량이 낮은 사양토가 양토와 미사질식토 보다 감소폭이 크게 나타났으나 토양경도의 증가폭은 낮았다. 초기 생육은 사양토에서 초장과 엽면적 그리고 지상ㆍ지하부 생체중과 건물중이 모두 높은 경향을 보였으나 엽록소함량은 낮았다. 과실은 사양토에서 크고 무거웠으며 단도와 색은 미사질식토에서 높게 나타났다. 상품과와 비상품과 수량은 사양토에서 가장 많았으며 또한 발효과 발생률도 높게 나타났다. 저장기간이 경과할수록 모든 토성에서 경도와 과중은 서서히 감소되었으나 당도는 저장 후 5일까지 증가한 후 감소되었다. 따라서 시설참외 재배지 객토시 과실의 품질과 수량에 영향을 미치는 토성이 고려되어야 하겠다.

• Applied Biological Chemistry
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• 제43권1호
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• pp.34-38
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• 2000

과채류에 대한 키토산 유기농업의 효과를 알아보기 위한 시도의 일환으로 배추의 생장 및 배추 중의 ${\gamma}-aminobutyric$ acid(GABA) 함량에 미치는 키토산비료의 시비효과를 조사하였다. 육묘상태에서 대조구에는 물을, 실험구에는 3% 키토산액을 500배 희석하여 2일에 1회 처리하였고, 본 밭에 정식후 대조구에는 물을, 실험구에는 동일한 키토산 희석액을 7일 1회 간격으로 엽면시비 하였다. 키토산비료의 시비는 물 처리구에 비하여 육묘상태에서 배추묘의 잎 길이를 증가시켰고, 어린묘 중의 GABA함량도 증진시켰다. 키토산비료의 시비는 본밭 토양의 물리화학적 특성을 크게 변화 시키지 않으면서 본밭에서의 배추의 평균 둘레 및 무게를 대조구에 비하여 증가시켰으며, GABA 함량도 증진시키는 것으로 조사되었다. 이들 결과들은 키토산비료의 시비가 배추의 생산량과 품질을 일부 향상시킬 수 있음을 제안해 주는 것이다.

• Natural Product Sciences
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• 제23권4호
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• pp.265-269
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• 2017

Pseudolaric acids of Pseudolarix kaempferi (Pinaceae) have been known as diterpenoids with potent anti-fungal-, anti-microbial, and cytotoxic activities. In the present study, the five MeOH extracts were prepared from the five plant part (root bark, stem bark, leaf, the inner part of root, and cone) to find the relation between the concentration of pseudolaric acids and cytotoxicity. Pseudolaric acids B and C were isolated from the root bark of P. kaempferi to use them as standard compounds. The five extracts were tested on cytotoxicity against six cancer cell lines, A549 (lung), HCT116 (colon), MDA-MB-231 (breast), SNU638 (stomach), and SK-hep-1 (liver) by SRB assay, but against K562 (leukemia) by SRB- or MTT assay. HPLC quantification were performed on a Shisheido Capcell PAK C18 column ($5{\mu}m$, $4.6mm{\times}250mm$) using 254 nm wavelength. The cytotoxicity ($IC_{50}$, $0.36{\mu}g/ml$ on K562 cell lines) of the root bark extract was potent and the content (101.1 mg/g extract) of pseudolaric acid B was very high in the root bark. These results suggest that the MeOH extract obtained from the root bark could be developed as the anti-cancer agent with a high quantity of pseudolaric acid B.

• 한국약용작물학회지
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• 제18권1호
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• pp.22-27
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• 2010

This study was carried out to investigate the physicochemical characteristics of 3-year-old ginseng (for Samgyetang product) cultured by various seeding density in direct-sowing culture. Ginsengs were cultured by the seeding density, 275, 300, 330 352 and 396 seeds per Kan, $180{\times}90cm$ area. Survived rate (82.1%) were the highest in plot of 352 seeds sowed, length and leaf width were high in plot of 300 and 352 seeds. Root yield grain was increased with increase of the seeding density in direct-sowing culture except 352 seeds sowed. Average root weight and diameter were the highest in plot of 352 seeds sowed, 31.6 g and 18.4 mm, respectively. Crude saponin and each ginsenosides content were the highest in plot of 275 seeds sowed. Rg1 content was decreased, Rc and Rb2 content were increased with increase of the seeding density. Total soluble sugar content was the highest in plot of 330 seeds sowed and the lowest in plot of 396 seeds sowed, and oligo- and disaccaride content were high in plot of 330 and 352 seeds sowed. Reological characteristics of ginsengs cultivated according to various seeding density, hardness and springness were high and maximum fracture force was low with decrease of the seeding quantity.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권6호
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• pp.47-64
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• 2021

In this study, the annual and monthly groundwater recharge for the Sapgyo-cheon upstream basin in Chungnam Province was evaluated by water balance analysis utilizing WetSpass-M model. The modeling input data such as topography, climate parameters, LAI (Leaf Area Index), land use, and soil characteristics were established using ArcGIS, QGIS, and Python programs. The results showed that the annual average groundwater recharge in 2001 - 2020 was 251 mm, while the monthly groundwater recharge significantly varied over time, fluctuating between 1 and 47 mm. The variation was high in summer, and relatively low in winter. Variation in groundwater recharge was the largest in July in which precipitation was heavily concentrated, and the variation was closely associated with several factors including the total amount of precipitation, the number of days of the precipitation, and the daily average precipitation. This suggests the extent of groundwater recharge is greatly influenced not only by quantity of precipitation but also the precipitation pattern. Since climate condition has a profound effect on the monthly groundwater recharge, evaluation of monthly groundwater recharge need to be carried out by considering both seasonal and regional variability for better groundwater usage and management. In addition, the mathematical tools for groundwater recharge analysis need to be improved for more accurate prediction of groundwater recharge.