• The Journal of Korean Obstetrics and Gynecology
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• v.23 no.2
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• pp.85-94
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• 2010

Purpose: This study aimed to investigate a clinical effect of Coo-Sun activity focusing on improvement of quality of life in female cancer patients. Methods: The subject of study consisted of 5 female cancer patients at the East-West Cancer Center of OO Oriental hospital. The survey methods of this study are Functional Assessment of Cancer Therapy-General (FACT-G) and State-Trait Anxiety Inventory (STAI). Patients performed Coo-Sun activity 6 times a week and filled out FACT-G and STAI questionnaire after every 3 times training. Results: In FACT-G questionnaire, physical well-being and emotional wellbeing was improved significantly after Coo-Sun activity. And change of social/family well-being and functional well-being score were not significant statistically. In STAI questionnaire, STAI1 was improved significantly after Coo-Sun activity. And change of STAI2 score was not significant statistically. Conclusion: After Coo-Sun activity, quality of life (QOL) in female cancer patients was improved and anxiety was decreased. But this study have limitation to prove effects of Coo-Sun activity completely in female cancer patients. So well designed prospective cohort study will be needed to prove its benefits.

• Journal of Microbiology and Biotechnology
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• v.24 no.1
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• pp.44-47
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• 2014

A biotransformation approach using microbes as biocatalysts can be an efficient tool for the targeted modification of existing antibiotic chemical scaffolds to create previously uncharacterized therapeutic agents. By employing a recombinant Streptomyces venezuelae strain as a microbial catalyst, a reduced macrolide, 10,11-dihydrorosamicin, was created from rosamicin macrolide. Its chemical structure was spectroscopically elucidated, and the new rosamicin analog showed 2-4-fold higher antibacterial activity against two strains of methicillin-resistant Staphylococcus aureus compared with its parent rosamicin. This kind of biocatalytic approach is able to expand existing antibiotic entities and can also provide more diverse therapeutic resources.

• Journal of The Korean Astronomical Society
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• v.54 no.4
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• pp.129-137
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• 2021

It has been established that the acoustic mode parameters of the Sun and Sun-like stars vary over activity cycles. Since the observed variations are not consistent with an activity-related origin, even Sun-like stars showing out-of-phase changes of mode frequencies and amplitudes need to be carefully studied using other observational quantities. In order to test whether the presumed relations between the global seismic parameters are a signature of the stellar activity cycle, we analyze the photometric light curve of HD 49933 for which the first direct detection of an asteroseismic signature for activity-induced variations in a Sun-like star was made, using observations by the CoRoT space telescope. We find that the amplitude of the envelope significantly anti-correlates with both the maximum frequency of the envelope and the width of the envelope unless superflare-like events completely contaminate the light curve. However, even though the photometric proxy for stellar magnetic activity appears to show relations with the global asteroseismic parameters, they are statistically insignificant. Therefore, we conclude that the global asteroseismic parameters can be utilized in cross-checking asteroseismic detections of activity-related variations in Sun-like stars, and that it is probably less secure and effective to construct a photometric magnetic activity proxy to indirectly correlate the global asteroseismic parameters. Finally, we seismically estimate the mass of HD 49933 based on our determination of the large separation of HD 49933 with evolutionary tracks computed by the MESA code and find a value of about 1.2M_☉ and a sub-solar metallicity of Z = 0.008, which agrees with the current consensus and with asteroseismic and non-asteroseismic data.

• Journal of the Korean Society of Tobacco Science
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• v.5 no.1
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• pp.35-42
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• 1983

This study was conducted to know changes in chemical components and some enzyme activity on tobacco leaves of NC2326 and Hyangchio (Nicotiana tabacum L. ) by different curing methods. The activity of $\alpha$, $\beta$-amylase and invertase of flue-cured tobacco variety NC2326 were higher than that of sun-cured variety Hyangchio. And the peak of all of enzyme activity in both varieties showed at about 60 hours (at color fixing stage) and 6 days (yellowing stage) after start of flue-curing and sun-curing, respectively. The peak time of reducing sugar content were same with the maximum enzyme activity during curing process in both varieties. During both curing process, the content of starch was greatly reduced and there was a corresponding increase in reducing sugars. Increase in total alkaloids content continued during flue-curing process in both varieties, but during sun-curing process total alkaloids content of NC 2326 were Increased whereas those of Hyangchio were decreased markedly.

• Korean Journal of Pharmacognosy
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• v.42 no.2
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• pp.155-160
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• 2011

In this study, we investigated on antioxidative activity, antibacterial activity against pathogens of acne and tyrosinase inhibitory activity in 75% EtOH extract and its fractions from bark of Prunus sargen tii. The total polyphenol and flavonoidcontent of the EtOAc fraction were found to be 378.0 mg/g and 67.5 mg/g as the highest content. In the measurement of DPPH radical scavenging ability, EtOAc and BuOH fraction were exhibited stronger scavenging ability than the other fractions and 75% EtOH extract. In antibacterial activity by disc diffusion assay against pathogen of acne, antibacterial activity of the EtOAc fraction and 75% EtOH extract was stronger than the other fractions. Especially, the EtOAc fraction was the highest effective fraction in the antibacterial activity. Moreover, tyrosinase inhibitory activity of EtOAc fraction, BuOH fraction and 75% EtOH extract was higher than the other fractions. In particular, tyrosinase inhibitory activity of the EtOAc fraction showed higher activity than ascorbic acid used as positive control.

• The Korean Journal of Food And Nutrition
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• v.25 no.3
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• pp.447-453
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• 2012

Various types of tea are consumed as a popular beverage worldwide particularly in Asian countries such as Korea, China, and Japan. The purpose of this study was to investigate the mineral contents, antioxidant properties and anticancer activity of Yak-Sun tea that is prepared by six oriental medicinal herbs. The results of the mineral contents were as follows; Ca, Mg, and Na contents were higher than those of green tea, whereas Fe, P, and K contents were lower than those of green tea. The total phenolics and flavonoid content of the Yak-Sun tea were higher than those of green and black teas. The $IC_{50}$ values of DPPH radical, hydroxyl radical, hydrogen peroxide radical scavenging of Yak-Sun tea were 0.78, 1.58, and 2.04 $mg/m{\ell}$, respectively, whereas the radical scavenging values of ${\alpha}$-tocopherol was 0.06, 0.05, and 0.09 $mg/m{\ell}$, respectively. When cancer cells were treated with Yak-Sun tea, the anticancer activity increased in a dose dependent manner. HCT116 colon cancer cell lines were dramatically increased, as compared to other cancer cell lines, such as MCF-7, H460, and MKN45 cell lines. The results of this study demonstrated that Yak-Sun tea could function as a tea to enhance health conditions for antioxidant and anticancer activity.

• Journal of The Korean Astronomical Society
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• v.36 no.spc1
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• pp.75-81
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• 2003

Changes in the earth's climate depend on changes in the net sunlight reaching us. The net depends on the sun's output and earth's reflectance, or albedo. Here we develop the limits on the changes in the sun's output in historical times based on the physics of the origin of solar cycle changes. Many have suggested that the sun's output could have been $0.5\%$ less during the Maunder minimum, whereas the variation over the solar cycle is only about $0.1\%$. The frequencies of solar oscillations (f- and p-modes) evolve through the solar cycle, and provide the most exact measure of the cycle-dependent changes in the sun. But precisely what are they probing? The changes in the sun's output, structure and oscillation frequencies are driven by some combination of changes in the magnetic field, thermal structure and velocity field. It has been unclear what is the precise combination of the three. One way or another, this thorny issue rests on an understanding of the response of the solar structure to increased magnetic field, but this is complicated. Thus, we do not understand the origin of the sun's irradiance increase with increasing magnetic activity. Until recently, it seemed that an unphysically large magnetic field change was required to account for the frequency evolution during the cycle. However, the problem seems to have been solved (Dziembowski, Goode & Schou 2001) using f-mode data on size variations of the sun. From this and the work of Dziembowski & Goode (2003), we suggest that in historical times the sun couldn't be much dimmer than it is at activity minimum.

• Korean Journal of Pharmacognosy
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• v.50 no.2
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• pp.112-117
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• 2019

In this study, extracts of bark from Ulmus davidiana var. japonica and its fractions were investigated the antioxidative, antibacterial and tyrosinase inhibition activity for physiological activity towards functional applications. In the measurement of DPPH radical scavenging activity, the ethyl acetate fraction showed higher radical scavenging ability than others. Moreover, in the tyrosinase inhibition assay, showed that the ethyl acetate fraction has good inhibition effects. Results of the DPPH radical scavenging and tyrosinase inhibition activity are related with the total polyphenol concentrations of ethyl acetate fraction. In antibacterial activity used to find out by utilizing the disc diffusion assay, chloroform fraction showed strong effect against Staphylococcus aureus and S. epidermidis. These results are related with the flavonoid contents of chloroform fraction. On the other hand, in the L929 cell viability measurement by MTT assay, the hexane, butanol and aqueous fraction treated at high concentration were showed cytotoxicity. But the others samples were exhibited a moderate viabilities. As a result of investigated the antioxidant and tyrosinase inhibition activity, the ethyl acetate fraction could be applicable for cosmetics related fields. And the chloroform fraction showed significant antibacterial activity against S. aureus and S. epidermidis.

• Natural Product Sciences
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• v.8 no.3
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• pp.94-96
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• 2002

Four hundred varieties of plant extracts were screened for inhibitory activity against the NFAT transcription factor which plays an important role in inducing immune response. Among them, the MeOH extract of Cnidium officinale showed potent activity, and the activity-guided separation yielded butylidenephthalide, senkyunolide A and falcarindiol as the active constituents. The $IC_{50}$ value of butylidenephthalide was $1.3{\times}10^{-4}\;M$ and was similar to that of senkyunolide A $(2.1{\times}10^{-4}\;M)$. Interestingly, falcarindiol showed higher activity $(IC_{50},\;2.6{\times}10^{-5}\;M)$ than the two phthalides.

• Journal of Pharmaceutical Investigation
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• v.15 no.3
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• pp.93-99
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• 1985

For the effective immobilization of urease on chitosan matrix with glutaraldehyde, optimal activation methods were studied, and its enzymatic properties was investigated. In the stability of enzyme. the retained activity of the native urease was 55% after it was soaked af pH 7 for 10 hrs., while the retained activity of immobilized one was about 62% after soaked at pH 6.5-8.5 for the same time. After heat treatment at $60^{\circ}C$ for 10 hrs., the native urease lost the most of its activity, while immobilized urease retained 54% of its activity by the same treatment. The retained activity of immobilized urease did not decrease nearly when it was stored at room temperature for 25 days. From Linweaver-Burk plots, the $V_{max}$ value of native urease was $66{\mu}M/l$ and that of immobilized urease was $41{\mu}M/l$, while Km value 40mM/l for both enzymes was unaltered.