• The Korean Chronic Disease News
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• no.50
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• pp.10-10
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• 1985

• The Korean Chronic Disease News
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• no.54
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• pp.9-9
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• 1985

• Journal of the Korean association of regional geographers
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• v.16 no.5
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• pp.497-516
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• 2010

The purpose of this study is to critically investigate the places of the 'Daegusibyeong(大丘十詠)', written by Seo, Geojeong based on Chinese poem, old documents, and field surveys in terms of a geographical perspective. It is asserted that the controversial aspects on the 'Daegusibyeong(大丘十詠)' are corrected through the analysis of old documents and field surveys. The results are summarized in the followings. 1) Ascertain historical and geographical evidence on places of 'Daegusibyeong(大丘十詠)' are accomplished properly based on old documents and field surveys. 2) The existing misinterpretation of the 'Daegusibyeong(大丘十詠)' are corrected by the finding of one Chinese character in the 'Dongsasimseung(桐寺尋僧)', the seventh poem of 'Daegusibyeong(大丘十詠)' consisted of 10 Chinese poems. 3) Subjects and content of the 'Daegusibyeong(大丘十詠)' in Sagajib(四佳集) are more rightly written than those of the old documents such as Daegueubji(大丘邑誌), Sinjeungdonggukyeojiseungram(新增東國輿地勝覽). 4) A few mistakes in the subject and word of the 'Daegusibyeong (大丘十詠)' are corrected as compared with the those of the old documents. 5) It is assumed that the brand value and image of Daegu city will be improved if the 'Daegusibyeong(大丘十詠)' is restored based on the results of the study and its restoration is utilized in Daegu city tour program.

• The Korean Journal of Mycology
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• v.16 no.1
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• pp.16-20
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• 1988

Auxotrophic mutants were obtained by UV-irradiation to mycelium of Ganoderma lucidum. Induction rate of auxotrophs was 5.78%. Interspecific fusion products of protoplasts were obtained by polyethylene glycol induced fusion of protoplasts from auxotrophic mutants of Ganoderma lucidum and Ganoderma applanatum. Fusion products were selected by means of the comparison with the mycelial growth rate and colony morphology. Fusion products were confirmed by mycelial morphology and esterase isozyme pattern. Some segregants were observed and fusion product produced fruit bodies.

• Food Science and Preservation
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• v.12 no.2
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• pp.130-134
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• 2005

This study was conducted to investigate the effects of pretreatment and extraction methods on the water extraction yields of sugar, protein and phenolic compounds, and the antioxidative activity of extract from Ganoderma lucidum. The herb was ground, sifted, and treated for 10 min with microwave (2,450 MHz) and ultrasound (20 kHz), and then extracted by boiling underatmospheric pressure and pressured boiling. Particle size $(0.8\~2.4\;mm)$, extraction time (2 hr) and solvent/solid ratio (20:1) were selected as optimal conditions for extraction.. Microwave and ultrasound treatment increased the extraction yields of total sugar, protein and phenolic compounds and the radical scavenging activity of extract. In comparison with microwave treatment and ultrasound treatment, microwave treatment was more effective than that of ultrasound treatment. The yields of all three compounds and the radical scavenging activity of extract were higher in pressured boiling extraction than in boiling underatmospheric pressure. The results showed that microwave radiation and sonication prior to extraction, and pressured extraction could be utilized for improving the extraction efficiency of G. lucidum.

• Journal of Mushroom
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• v.2 no.1
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• pp.33-37
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• 2004

To develop neohaplonts for Ganoderma breeding, protoplasts were isolated from dikaryotic mycelium and regenerated. Selection rate of neohaplonts varied between ASI7074, ASI7091, ASI7094, ASI7100 and ASI7115, showing 5.24% on the average. Auxotropic mutants from Ganoderma monokarions were recovered by UV irradiation on protoplasts. Protoplast survival rates were 1.9% ASI 7074, 0.17% ASI 7091, and zero percent ASI 7100 using 300 second irradiation. Four auxotrophic strains were recovered from 1,536 colonies screened that will be further utilized for protoplast fusion and transformation.

• Journal of Food Hygiene and Safety
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• v.2 no.2
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• pp.57-65
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• 1987

ABSTRACT - To examine antihypertensive components of Ganoderma lucidum in Korea, two kinds of fruiting bodies (J and K) were used for extraction with water and the extracts were purified by ethanol precipitation and dialysis. Three fractions, i.e., the aqueous total extract(A), the ethanol supernatant(B} and the purified precipitate(C), were compared for antihypertensive activity in anesthetized spontaneously hypertensive rats (SUR). Although fractions A and B showed the activity, fraction C did not. Particularly, fraction B of sample K produced 44.3% reduction in diastolic blood pressure and 30.6% reduction in heart rate after i.v. administration of a dose of 10 mg/kg. Direct effects of this fraction B to the heart were observed in the isolated blood perfused heart preparation of the dog. It induced positive chronotropic and inotropic responses dose-dependently in the case of sample J. In the case of sample K, marked chronotropic and inotropic effects on atrial muscle but not on ventricular muscle were induced. In both samples, coronary blood flow (CBF) was dose-relatedly increased.reased.

• The Korean Journal of Mycology
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• v.18 no.3
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• pp.137-144
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• 1990

To examine effects on complement and reticuloendothelial system, alkali extract was isolated from cultured mycelium of Ganoderma lucidum IY107. It was shown to strongly activate both classical and alternative pathways of complement as compared with krestin. Activated complement C3, 3rd peak, was observed by crossed immunoelectrophoresis. It was also shown to activate reticuloendotherial system of ICR mice in the carbon clearance test and to increase hemolytic plaque forming cells of the spleen. Carbohydrate and protein contents of the alkali extract were 10% and 49%, respectively. The carbohydrate consisted of four monosaccharides and the protein contained 16 amino acids.

• Journal of Digital Convergence
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• v.19 no.6
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• pp.233-238
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• 2021

Recently, blockchain technology accumulates and stores all transactions. Therefore, in order to verify the contents of all transactions, the data itself is compressed, but the scalability is limited. In addition, since a separate verification algorithm is used for each type of transaction, the verification burden increases as the size of the transaction increases. Existing blockchain cannot participate in the network because it does not become a block sink by using a server with a low specification. Due to this problem, as the time passes, the data size of the blockchain network becomes larger and it becomes impossible to participate in the network except for users with abundant resources. Therefore, in this paper, we are improved transaction as studied the zero knowledge proof algorithm for general operation verification. In this system, the design of zero-knowledge circuit generator capable of general operation verification and optimization of verifier and prover were also conducted.

• Journal of Mushroom
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• v.20 no.3
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• pp.183-185
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• 2022

High-income mushroom crops require complex farming. Therefore, we conducted a test to identify the optimum temperature for the production of antler-shaped Ganoderma lucidum using the King Oyster mushroom cultivation facility. T-N showed 0.28% of oak sawdust and 2.2% of nutritional source. The pH of oak sawdust was 6.0, indicating weak acidity, and that of rice steel was 6.6, indicating neutrality in nutrition source. Study on the quality characteristics of mushrooms showed that the number of days at 25℃ were 5~6 and those at 30℃ were 3~5; the representative length at 25℃ was 57.5 mm and that at 30℃ was 92.2 mm; the biological weight at 25 ℃ was 43 g, which was greater than that at 30℃.