• 한국식품영양과학회지
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• 제1권1호
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• pp.33-35
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• 1972

The curcumin method was adopted in this research for quantitative analysis of boron in plants. An experiment if this method is suitable to present conditions of our laboratory led us to the following conclusions. 1. In making ashes the addition of 0.5ml saturated $Ba(OH)_2$ solution to boron $1{\gamma}$. could completely prevent it from volatilizing. 2. The soft glass ware made in Korea was unfit for this experiment because of the differences in quality. The polyethylene cup was desirable for the quantitative analysis of boron.

• 한국영양학회:학술대회논문집
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• 한국영양학회 2003년도 연합학술대회
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• pp.281.1-281.1
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• 2003

• 한국영양학회:학술대회논문집
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• 한국영양학회 2001년도 춘계연합학술대회 초록
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• pp.303.1-303
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• 2001

• 한국식품영양학회지
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• 제5권1호
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• pp.41-48
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• 1992

Megaplasmids of Azospirillum strains isolated in the Korean paddy field were identified. Five megaplasmids were identified from Azospirillum lipoferum AS192. Homology between nod ABC gene of Rhizobium meliloti and megaplasmids of Azospirillum lipoferum AS192 and Azospirillum brasilense AS112 was found. This observation might have reflected a common mechanism in the early process of soil bacterial association with plants.

• 한국식품영양학회지
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• 제17권1호
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• pp.18-24
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• 2004

천연 식물류 추출물을 첨가하여 제조한 약주의 영양성분과 항산화 활성을 비교 분석한 결과 수용성 페놀화합물은 천연식물 첨가 약주에서 대조군(5.5 mg/kg)에 비하여 약 1.7배 더 높게 정량 되었으며, 잔존율도 47.4%로 더 높았다. 유리당은 대조군에서는 arabinose와 maltose가 각각 16.2, 15.6 mg/100 g 검출된 반면, 천연식물을 첨가한 약주에서는 lactose가 6.9 mg/100 g으로 가장 높은 함량이었고 maltose는 검출되지 않았다. 무기물의 함량은 인> 칼륨 > 마그네슘 >칼슘 >철분의 순으로 높게 검출되었고, 철분과 나트륨은 숙성 기간의 경과에 따른 함량 차이가 거의 없었다. 아미노산 함량은 숙성 기간의 경과와 더불어 감소하였는데 대조군의 경우 숙성 30일에 총 아미노산 함량이 약 72% 감소한 반면 천연식물을 첨가한 약주의 경우 약 6.8%로 감소 비율이 훨씬 낮았다. 약주를 각기 다른 농도로 희석하여 전자공여능을 측정한 결과 대조군의 경우 희석배수가 증가할수록, 숙성기간이 경과할수록 전자공여능이 저하되는 경향을 나타내었다. 반면 천연식물류를 첨가한 약주는 숙성 30일까지 희석 배수에 관계없이 95.7∼96.7%의 높은 전자공여능을 나타내었다. SOD 유사활성은 희석배수 및 숙성기간의 경과와 서로 반비례하는 경향을 나타내었다. 가장 높은 SOB 유사활성을 나타낸 숙성 3일째의 천연식물류 첨가 약주의 경우 원액과 2배 희석한 시료에서 각각 51.5, 53.9%의 SOD 유사활성을 나타내었다.

• Journal of Ginseng Research
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• 제43권4호
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• pp.654-665
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• 2019

Background: Panax ginseng Meyer has widely been used as a traditional herbal medicine because of its diverse health benefits. Amounts of ginseng compounds, mainly ginsenosides, vary according to seasons, varieties, geographical regions, and age of ginseng plants. However, no study has comprehensively determined perturbations of various metabolites in ginseng plants including roots and leaves as they grow. Methods: Nuclear magnetic resonance ($^1H$ NMR)-based metabolomics was applied to better understand the metabolic physiology of ginseng plants and their association with climate through global profiling of ginseng metabolites in roots and leaves during whole growing periods. Results: The results revealed that all metabolites including carbohydrates, amino acids, organic acids, and ginsenosides in ginseng roots and leaves were clearly dependent on growing seasons from March to October. In particular, ginsenosides, arginine, sterols, fatty acids, and uracil diphosphate glucose-sugars were markedly synthesized from March until May, together with accelerated sucrose catabolism, possibly associated with climatic changes such as sun exposure time and rainfall. Conclusion: This study highlights the intrinsic metabolic characteristics of ginseng plants and their associations with climate changes during their growth. It provides important information not only for better understanding of the metabolic phenotype of ginseng but also for quality improvement of ginseng through modification of cultivation.

• 원예과학기술지
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• 제32권2호
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• pp.142-148
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• 2014

Effect of silicon (Si) nutrition on growth and temperature stress tolerance of Nephrolepis exaltata 'Corditas' grown in a soilless substrate was examined. In vitro-grown acclimatized plantlets were transplanted into the pots containing a coir-based substrate. A nutrient solution containing 0, 50, or $100mg{\cdot}L^{-1}$ Si was supplied through a drip-irrigation system. After 5 months of cultiv ation, S i-treated and -untreated p lants were grown at 10, 25, or $40{\pm}1^{\circ}C$ under a 12 h photoperiod with $530{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPFD and 60% RH. After 7 days, chlorophyll content and chlorophyll fluorescence parameters were measured. Silicon nutrition had a negative effect on growth characteristics of N. exaltata 'Corditas'. However, Si-treated plants had more tolerance to temperature stress than the control plants. The Fv/Fm value was not significantly different when the plants were exposed to $25^{\circ}C$. However, significant difference in Fv/Fm was recorded when plants were exposed to 10 or $40^{\circ}C$. Thus, Fv/Fm could be used as an indicator of low and high temperature tolerance in ferns. The present study also suggests that application of Si may be used to enhance temperature tolerance of ferns.

• Journal of Nutrition and Health
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• 제36권2호
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• pp.101-108
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• 2003

Antiplatelet aggregation, anticoagulant and lipid-lowering drugs are clinically widely used for secondary preventive purpose in the cardiovascular patients, but there is no primary preventive agents to prevent these diseases. With the aim of developing effective primary agents for cardiovascular diseases, we tried to formulate an optimized mixture of natural plants extract containing Theae sinensis, Camelliae sinensis, Vitis vinifera, Gingko folium and curcuminoids from Curcuma longa and to evaluate its anti-thrombotic and anti-hypercholesterolemic effects in vivo. The inhibitory effect of curcuminoids on vascular smooth muscle cell proliferation and migration were also investigated in vitro. in the animal experiments treated with hyperlipidemic diet, oral treatment of curcuminoids and natural plants extracts mixture (100 mg/kg) into male Sprague Dawley rats for 7 week simultaneously inhibited platelet aggregation as well as improved lipid profile in the blood. Compared to control group, both of curcuminoids-treated and mixture-treated groups revealed significantly decrease of total cholesterol (24.4%, 28.6%), free cholesterol (25.1%, 24.0%), cholesterol ester (14.6%, 29.0%), LDL-cholesterol (27.0%, 32.0%) and triglyceride (15.0%, 31.0%), respectively. However, both groups showed increase of HDL-cholesterol (46.6% and 51.5%) . In particular, atherogenic index of curcuminoids and mixture treatment group was significantly decreased to 47.0% and 56.0%, respectively. Furthermore, oral treatment of curcuminoids and mixture significantly inhibited collagen-induced platelet aggregation (21.1% and 29.1%, respectively), compared to control group. The anti-thrombotic values of mixture was almost similar to that of aspirin treatment (100 mg/kg) group. These results suggest that the oral treatment of curcuminoids-based natural plant extract mixture improved cardiovascular conditions in hyperlipidemic rats.

• Preventive Nutrition and Food Science
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• 제5권3호
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• pp.174-176
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• 2000

Seventeen wild vegetables consumed commonly in Korea were tested for inhibitory activities against alpha-glucosidase, followed by Bupleurum longeradiatum and Angelica decursiva. The hexane-soluble fractions of Hosta longipes, Ainsliaea acerifolia, Pedicularis resupinata, Bupleurum longeradiatum, and Angelica decursiva all at the concentration of 5 mg/ml, inhibited enzyme activity by greater than 50%, and the ethylacetate-soluble fractions of Hosta longipes, and Codonopsis lanceolata, and Bupleurum longeradiatum had relatively strong inhibitory activity against the enzyme. These results suggest that some edible plants merit further evaluation for clinical usefulness as anti-diabetic drugs.

• 한국식품영양과학회지
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• 제5권1호
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• pp.81-86
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• 1976

Soybean has been considered as an important source of food protein in many countries. This experiment was attempted to determine the effect of mineral nutrition on growth and amino acid composition of soybean by using the methods developed for other plants. The results showed that S was more effective than P on the growth of soybean when the amount of cation was not changed. Among cations investigated K was more effective than Mg and Ca on its growth. However, higher amounts of Ca resulted in toxic effect. In general, the content of amino acid hydrolyzed by HCl decreased in NS and NP as well as KCa and KMg groups. Amino acids, i.e., proline, cystine, aspartic acid, lysine and histidine were not detected in NS and NP in addition to KCa and KMg groups eventhough control group showed considerable amount of these amino acids.