• 농업과학연구
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• 제50권4호
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• pp.967-976
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• 2023

Biochar is emerging as a promising substance for achieving carbon neutrality and climate change mitigation. It can absorb several nutrients via ion bonding on its surface functional groups, resulting in slow dissociation of the bonds. Biochar, like organic fertilizers, contributes to sustainable nutrient management. The purpose of this study was to investigate the effects of nutrient-coated biochar amendments on leafy vegetables production and soil fertility. The nutrient-coated biochar was produced by soaking rice husk biochar in a nutrient solution containing nitrogen (N), phosphorus, and potassium for 24 hours. Nutrient-coated biochar and organic fertilizers were applied to soil at a rate of 120 kg·N·ha^-1. The growth components of the leafy vegetables showed that nutrient-coated biochar led to the highest fresh weight (FW) of both lettuce and kale (i.e., 146.67 and 93.54 g·plant^-1 FW, respectively). As a result, nutrient-coated biochar amendments led to superior yield compared to the control treatment and organic fertilization. The elemental composition of leafy vegetables revealed that soil amended with nutrient-coated biochar resulted in higher nutrient contents, which was attributed to the high nutrient contents supplied by the rice husk biochar. Soil amendment with nutrient-coated biochar positively enhanced the soil fertility compared to amendment with organic fertilizer. Therefore, nutrient-coated biochar is a promising substance for enhancing agronomic performance of leafy vegetables and improving soil fertility.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2003년도 춘계 학술발표대회
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• pp.138-139
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• 2003

To investigated the effect of liquid culture conditions and nutrient sources on the formation with bioactive substance of Paeilomyces japonica and Cordyceps militaris cultivated in the country, the result are as follow; The growth temperature of two mycelia is 25$^{\circ}C$ and the proper temperature for cordycepin growth is around 20$^{\circ}C$. The formation amount of bioactive substance by nutrient sources reached its peak with using 2% glucose and 1% galactose in case of carbon sources and 0.4% inorganic compound in case of nitrogen sources. Also, the ratio of C/N was optimal with 3% glucose 1% peptone. For a natural medium, most grains were sufficient but the soybean oil was superb. The formation amount of protein-binding polysaccharide that are used for anticancer substance was in proportion to the growth rate of mycelium, had lots of aeration and showed a trend of increasing when the acidity lower. and the content of structural protein showed a trend of increasing when the acidity lower. However, the content of the structural hexosamin did not get a great the effect of culture conditions and nutrient sources. The constitution of monosaccharide that organizes a protein-binding polysaccharide greatly changed in proportion to carbon sources. When Paecilomyces japonica cultured in a silkworm larvae for 30 days, the content of cordycepin was 204.5 mg/100mL as a dry weight in the fruiting body, 41.8 mg/100mL in mycelium and larva, and the content for each bottle was average 29.5 mg/100mL. In case of Cordyceps militaris for 45days, the fruiting body was 563.5 mg/100mL, the larva and the mycelium was 86.1 mg/100mL, and the content for each bottle was average 65.0 mg/100mL.

• 생명과학회지
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• 제17권7호통권87호
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• pp.983-989
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• 2007

Auxin, siderophore, 그리고 cellulase를 동시에 생산하는 생물방제균주 B. licheniformis Kll을 식물병원성진균을 대상으로 균사 성장억제능을 확인결과 6종의 식물병원성 진균에서 균사체 성장억제능을 확인하였으며, 그 중에서 토마토 시들음병을 유발하는 F. oxysporum(KACC 40037)에 가장 강력한 억제능을 나타내었다. 그리고 본 균주가 생산하는 항진균성 siderophore이외에 세포벽이 cellulose로 구성된 P. capsici의 cell wall을 분해하는 cellulase를 생산하는 것을 추가적으로 확인하였다. 뿐만아니라 B. licheniformis Kll은 nutrient broth(pH 8.0), $30{\circ}C$에서 96시간 배양시 토마토 시들음병에 대한 항진균 활성이 가장 높았고, 이는 cellulase의 활성과 sideropore의 최대 생산조건과는 상이하였다. 또한 탄소원과 질소원으로 starch와 urea를 각각 첨가시 항진균성 활성이 가장 높았고, 이 역시는 cellulase의 활성과 항진균성 siderophore의 최대 생산조건과 일치하지 않았다. 그리하여 본균주 B. licheniformis Kll은 식물성장촉진 물질은 auxin, 항진균성 siderophore와 cellulase를 생산함과 동시에 또 다른 강력한 항진균성 물질을 생산하는 것을 추가로 확인하였다.

• 한국작물학회지
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• 제45권1호
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• pp.32-37
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• 2000

The in vitro culture of rice panicles is a culturing technique only panicle without other organs in culture solution containing organic substance, so that would be useful to study how assimilate supply affects grain development and maturation. To find the optimum stage for in vitro culture, rice panicles grown in greenhouse were sampled periodically after anthesis and cultured in nutrient medium. The panicles older than 1 weeks after anthesis had produced normal grains. Grain-filling was apparently dependent upon sucrose concentration (8-12 %) in medium, but not affected by nitrogen concentration supplied with glutamine. As far as rice panicle was supplied with sucrose and N in nutrient medium, grains continued accumulation of dry matter and maturation regardless to light condition. Considerably, grain-filling was improved when panicles were positioned horizontally inside flask, so that each grain was partially submerged to nutrient medium.

• KSBB Journal
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• 제32권2호
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• pp.133-139
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• 2017

Rheum palmatum has traditionally been used as a preventive agent and medication against fever and infection. The aim of this study was to isolate and characterize an antibacterial substance from R. palmatum that is effective against bacterial vaginosis. A methanol extract from R. palmatum showed antibacterial activity against Lactobacillus vaginalis KC TC 3515, Chryseobacterium gleum KCTC 2904, and Sphingomonas paucimobilis KCTC 2834, which cause bacterial vaginosis. After extraction and pH control of the methanol extract from R. palmatum, we found that acidic and alkaline extracts did not show antibacterial activity. A neutral extract (50 mg/mL) displayed an inhibitory zone of 18 mm on a nutrient agar plate with C. gleum KCTC 2904. Fractions No. 11 and 12 among 41 fractions obtained by silica gel column chromatography produced inhibitory zones of 10 mm on nutrient agar plates with C. gleum KCTC 2904. $R_f0.15$ and $R_f0.17$ spots produced by TLC of fraction No. 11 showed antibacterial activity against C. gleum KCTC 2904. Isolation and purification of the peak at a retention time (Rt) of 9.427 min was achieved by HPLC of $R_f0.29spots$. The peak at Rt 9.427 min showed antibacterial activity against C. gleum KCTC 2904.

• Journal of Nutrition and Health
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• 제49권1호
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• pp.1-7
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• 2016

Purpose: The aim of this review is to comprehensively summarize the definition of vitamin D as a nutrient as well as a hormone-like molecule and its new function in prevention of various chronic diseases. Methods: The review was written by the method for systematic reivew writing. Literatures from the various sources, including research articles, book chapters, proceedings and electronic materials as appropriate, were screened first and then reviewed and analyzed for the review. Results: Vitamin D was originally considered as the essential nutrient as a vital carbon compound and was first discovered among children with osteomalacia, also known as ricket disease, characterized by poorly calcified bones which were easily bent rather than broken. Since that time, vitamin D has been known as the key nutrient to improve bone health. However, recently emerging study findings have shown that vitamin D acts as the hormone-like nutrient since it is synthesized like a hormone when our body needs and this particular vitamin also acts like a cell signaling ligand which regulates gene expression of various proteins. So far positive effects of vitamin D have been suggested for the action of anticancer, anti-immune function, and anti-cardiovascular disease, as well as antidiabetic function, etc. In this review, the definition for vitamin D as a nutrient vitamin as well as a hormone-like molecule, cell signaling mechanism of vitamin D, and finally the potential role for the prevention of chronic diseases are discussed. Conclusion: Vitamin D is now being considered as a vital nutrient as a vitamin and as a potential substance for prevention of several chronic diseases.

• 대한한의학원전학회지
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• 제21권3호
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• pp.147-155
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• 2008

Seopcheonsa(葉天士) regarded the cause of Stomach-Eum[胃陰] deficiency as the lack of fluid and humor induced the heat by Eum(陰, yin) deficiency constitution, external pathogen, overexertion and fatigue, misused medication etc. He said that the symptoms of Stomach-Eum deficiency was related to indigestion of food and that it induced the short supply of nutrition for the whole body and the symptoms by disabled Earth[土]-engenders-Metal[金]. He presented the treatment of clearing Stomach-Fire[胃熱] and nourishing Stomach-Eum[胃陰], and used Geumgwemaekmundongtang(金匱麥門冬湯). And he emphasized Stomach-Eum to supplement existing Spleen-Yang[脾陽] centered treatment. Dangjonghae(唐宗海) regarded Spleen-Eum[脾陰] as these, first, it was fluid and humor such as digestive enzyme. Secondly, it was nutritive substance itself. Finally, it contained plaster-oil and blood-agglutination which formed flesh with nutritive substance. Seopcheonsa and Dangjonghae both thought that fluid and humor was necessary to digest food. However, Dangjonghae's Spleen-Eum[脾陰] included nutritive substance as the result of digestion. So we can say that Dangjonghae integrated Spleen-Eum with Stomach-Eum and Spleen-nutrient.

• 한국환경보건학회지
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• 제19권4호
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• pp.33-37
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• 1993

The problem for the removal of phosphorus increased due to reasons like eutrophication control. However its removal and operating criteria were not well developed. This study was made for enhanced removal of P by iron contactor by intermittent aeration activated sludge process. Experiment was conducted to find the effects of organic substance load and HRT, nutrient removal efficiency. When applied organic substance load and HRT, II &III reactor were good treatment efficient while come from Fe of iron contactor. Release of phophorus from II &III reactor sludge under anaerobic condition was low. As the process developed, the content of released ionized Fe from iron contactor increased. In addition, the rate of phosphorus removal became accelerating, and the removed sludge was stabilized in the existence of insoluble status.

• Journal of Microbiology and Biotechnology
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• 제33권5호
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• pp.680-686
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• 2023

Aging is a complex series of multi-organ processes that occur in various organisms. As such, an in vivo study using an animal model of aging is necessary to define its exact mechanisms and identify anti-aging substances. Using Drosophila as an in vivo model system, we identified Crataegus pinnatifida extract (CPE) as a novel anti-aging substance. Regardless of sex, Drosophila treated with CPE showed a significantly increased lifespan compared to those without CPE. In this study, we also evaluated the involvement of CPE in aging-related biochemical pathways, including TOR, stem cell generation, and antioxidative effects, and found that the representative genes of each pathway were induced by CPE administration. CPE administration did not result in significant differences in fecundity, locomotion, feeding amount, or TAG level. These conclusions suggest that CPE is a good candidate as an anti-aging food substance capable of promoting a healthy lifespan.

• 한국식품영양과학회지
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• 제4권1호
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• pp.19-23
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• 1975

From a study of the nutrient and gelation substances in Korean persimmon such as Jangdongsi, Pasi, Teabongsi, Kurigam, Nabjackgam, Gamsi and Hucks: The results obtained are summerized as follows: 1. According as persimmon changes into mellowed persimmon in the same kind the ammounts of sugar was increased, while the ammounts of fiber was decreased, but there was little difference in the other nutrient contents. 2. The ratio of 'Ca' and 'P' in persimmons in generally balanced at 1 : 2.5 3. Compared to the standard combination ratio of gelation substance, pectin in the persimmons was over but acid and sugars were very low.