• Korean Journal of Microbiology
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• v.30 no.3
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• pp.213-217
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• 1992

Glucosyltransferase of Streptococcus mutans NCTC 10449 was purified and characterized. It relates with production of insoluble glucan in dental caries. The molecular weight was estimated to be 152.000. The optimum pH and temperature was 6.5 and $35^{\circ}C$. respectively. The enzyme was stable in alkaline pH. The Michaelis constants of the enzyme for releasing of fructose were 48 mM. Hydrolysis rate of insolut~le glucan by tlextranase was higher in S. mutuns NCTC 10449 than that of strains isolated from saliva.

• Proceedings of the Korea Hospitality Industry Research Society Conference
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• 2003.05a
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• pp.19-35
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• 2003

This study was carried out to find a cholesterol removal rate, flavor development, and bitter amino acid productions in Cheddar cheese treated with -cyclodextrin (${\beta}-CD$): 1) Control (no homogenization, no ${\beta}--CD$), and 2) Milk treatment (1000 psi milk homogenization, 1% ${\beta}-CD$). The cholesterol removal of the cheese were 79.3%. The production of short-chain free fatty acids (FFA) increased with a ripening time in both control and milk treated cheese. The releasing quantity of short-chain FFA was higher din milk treated cheese than control at 5 and 7 mo ripening. Not much difference was found in neutral volatile compounds production between samples. In bitter-tasted amino acids, milk treatment group produced much higher than control. In sensory analysis, texture score of control Cheddar cheese significantly increased, however, that in cholesterol-reduced cheese decreased dramatically with ripening time.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.177-178
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• 2015

This paper proposes a power smoothing scheme of a doubly-fed induction generator. The proposed scheme aims to mitigate system frequency deviation caused by the variable wind. To achieve this, a dynamic droop loop is used and its gain changes with rate of change of frequency so that it can release a large amount of kinetic energy at the initial stage of a frequency event. The performance of the proposed scheme was investigated in a model system with high wind penetration using EMTP-RV simulator. The test results indicate that the scheme can smooth the output power by absorbing or releasing the output power under a varying wind condition.

• The Korean Journal of Pain
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• v.9 no.1
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• pp.120-125
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• 1996

It has been reported by some authors that caudal block with local anesthetic and steroid is the most effective therapeutic modality for piriformis syndrome; and the incidence ratio of female to male being 6 to 1. We treated 89 patients with piriformis syndrome in 1995. From those clinical experiences and anatomical studies we heave arrived at several conclusions different from other authors. Our results indicate the following: 1) Piriformis syndrome does not provoke lower back pain. 2) Our rate of incidence showed a very different profile as results showed a female to male ratio of 33:56. 3) Releasing the compressed nerves(gluteal, sciatic) with spasmolytic treatment on the piriformis muscle itself is thought to be the only therapeutic modality for piriformis syndrome.

• Fisheries and Aquatic Sciences
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• v.23 no.4
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• pp.11.1-11.11
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• 2020

We tried to find the optimal growth conditions of sea cucumber and to analyze the economic effectiveness of the sea cucumber seedling release project in Korea. We first examined the optimal growth conditions of sea cucumber in the relating literatures. Then, we analyzed the economic effectiveness of the sea cucumber seedling release project of the Woncheon fishing village union of Gyeongnam Province in 2016-2018 by using the cost benefit analysis method. The net income of the release project of the Woncheon fishing village union was 69,850 Korean won. The benefit to cost ratio of the sea cucumber seedling release project of the Woncheon fishing village union was estimated to be 1.7, indicating that the project was economically feasible. In order to improve the economic feasibility of the sea cucumber release project, as we see in the case of the Woncheon fishing village union, it is necessary to manage the purchase of the sea cucumber seedling, to improve the recapture rate of sea cucumber, and to manage marketing of sea cucumber.

• Journal of Pharmaceutical Investigation
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• v.19 no.2
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• pp.109-116
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• 1989

Solid dispersion of fenticonazole nitrate (FN) with poloxamer 407, polyethylene glycol 6000, povidone (K-90) were prepared by the solvent method. To characterize the state of the drug in solid dispersions, the x-ray diffractometry and differential scanning calorimetry were carried out. The identification of these systems suggested that FN in the poloxamer 407 system remained in crystalline state, and the drug in the PVP system was amorphous. A marked increase in the dissolution rate of FN was attained by dispersing the drug in the hydrophilic polymers used, and the dispersion with poloxamer 407 was superior to the other two carriers in releasing the drug into solution.

• Structural Engineering and Mechanics
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• v.57 no.2
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• pp.357-367
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• 2016

This paper illustrates an experimental study on a self compacting polymer concrete called isobeton made of polyurethane foam and expanded clay. Several experiments were conducted to characterize the physic-mechanical properties of the considered material. Application of the Linear Elastic Fracture Mechanics (LEFM) and determining the toughness of two isobetons based on Belgian and Italian clay, was conducted to determine the stress intensity factor $K_{IC}$ and the rate of releasing energy $G_{IC}$. The material considered was tested under static and dynamic loadings for two different samples with $10{\times}10{\times}40$ and $10{\times}15{\times}40cm$ dimensions. The result obtained by the application of the Linear Elastic Fracture Mechanics (LEFM) shows that is optimistic and fulfilled the physic-mechanical requirement of the study.

• Journal of Preventive Medicine and Public Health
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• v.52 no.4
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• pp.272-275
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• 2019

The 2018 National Guideline for Tuberculosis Control, which was published by the Korea Centers for Diseases Prevention and Control (KCDC), mandates conducting an epidemiological survey among close contacts of active tuberculosis patients at public institutions such as schools. In the procedure for these surveys, the tuberculin skin test (TST) is mandated as the screening test for latent tuberculosis infection in elementary school students. However, several guidelines recommend using the interferon-gamma releasing assay (IGRA) for contacts aged over 5 years with a Bacillus Calmette-$Gu{\acute{e}}rin$ vaccination history. The main reason for this is that IGRA has a higher specificity and lower false positive rate than TST. In addition, IGRA requires only a single visit to draw blood and the results are available within 24 hours. These advantages could promote cooperation from both parents and students in conducting these surveys. Thus, these findings regarding the benefits of IGRA for surveys of close contacts at elementary schools should be incorporated into the KCDC guideline.

• Journal of Korean Medicine Rehabilitation
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• v.19 no.1
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• pp.103-112
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• 2009

Objectives : This study was aimed to find out the physiological mechanism of craniosacral therapy, especially in CV4 technique and cranial rhythmic impulses. Methods : Recent studies were reviewed for cranial rhythmic impulses, and the ancient and present text were reviewed for the therapy of sub-occiput and cranial-suture part. Results and Conclusions : 1. Suboccipital muscles releasing may have made CV4 technique to effect. 2. The mechanism of the meridians of acupuncture and craniosacral system can be cooperative together in many parts of the clinical treatments. 3. Arterial vasomotor waves have a frequency similar to reports of cranial rhythmic impulses. The methods which have relation to heart rate variability, will be useful for the study of craniosacral therapy.

• Journal of Pharmaceutical Investigation
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• v.27 no.1
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• pp.71-77
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• 1997

With the aim of improving periodontal regeneration efficacy, as a biodegradable local drug delivery device, drug releasing chitosan beads were prepared. Chitosan beads were prepared through the formation of intermolecular or intramolecular ionic interaction bewteen chitosan and sodium tripolyphosphate and were loaded with flurbiprofen. The mean diameter of the beads was $250\;{\mu}m$. Drug loading efficiency was improved by regulating the pH of tripolyphosphate solution. The drug release kinetics mainly depended upon the hydrophobic properties of the flurbiprofen, that is, the release of flurbiprofen showed initial burst with rapid release for the first day followed by a levelling off of the release rate. However, the release rate could be controlled by the formulation factor including the pH, concentration of the tripolyphosphate solution, gelation time, drug contents. From these results, flurbiprofen loaded chitosan beads were anticipated as biodegradable local drug delivery devices for periodontal regeneneration.