• Journal of Korean Dental Science
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• v.9 no.2
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• pp.69-73
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• 2016

Clinicians must be able to recognize post-extraction complications and treat them in a timely manner; complications that may potentially be life-threatening require special attention. Although arteriovenous malformation (AVM) is a very rare disorder, it may induce life-threatening hemorrhage during surgical intervention in the pertinent site. The present article examines the diagnosis and treatment modalities of AVM based on the case of a patient who was diagnosed with AVM with continuous bleeding after tooth extraction and who was successfully treated.

• Carbon letters
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• v.24
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• pp.10-17
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• 2017

With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption effects of SPME fiber. This review introduces the preparation methods and applications of different kinds of carbon-based material coatings on fibers. In addition, directions for future research on carbon material composites are discussed.

• Journal of Korean Dental Science
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• v.9 no.1
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• pp.42-48
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• 2016

Prophylactic removal of impacted third molars is a common procedure in dentistry, but the necessity of routine extraction is still controversial. When impacted third molars caused severe apical root resorption of the second molars, orthodontic traction of the third molars after extraction of the damaged second molars could minimize alveolar bone defect and preserve the patient's natural teeth. By well-planned orthodontic treatment, functional occlusion was established avoiding extraction of the impacted teeth and eliminating the possibility of a large bone defect after extraction.

• YAKHAK HOEJI
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• v.35 no.4
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• pp.271-276
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• 1991

The extractability and stability of ginkgoflavonolglycosides under presence of several cellulose preparations were investigated. The enzymes used were macerosin, cellulose C and cellulase NC. The content variation of the glycosides was measured with HPLC method, using caffeic acid as an internal standard. The methanol extract of ginkgo leaf, containing the total flavonolglycosides of 4.46%, was used for the content comparison. By extraction with the enzymes, each or mixed, the peak levels of all the glycosides began to decrease after 1 or 2 hours. After 24 hour extraction, most of the glycosides were degraded to minor components. The flavonolglycosides in ginkgo leaf were also hydrolysed simply by the water extraction. After 24 hour extraction with water at $40^{\circ}C$, the peak levels of major glycosides were distinctly decreased. Rutin was hydrolysed by enzyme treatment or by ginkgo leaf itself. As a result, it was concluded that the commercially available cellulases and the ginkgo leaf itself contain the activities of $\beta$-glycosidase and $\alpha$-rhamnosidase. Kaempferol-3-O-(6'"-O-p-coumaroylglucosyl)-rhamnoside and four other ginkgo flavonolglycosides were not hydrolysed under the same condition.tion.

• Bulletin of the Korean Chemical Society
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• v.35 no.1
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• pp.45-50
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• 2014

A fully packed capillary electrochromatographic (CEC) microchip with an on-column micro-solid phase extraction (SPE) bed for the preconcentration and separation of organic analytes was prepared. A linear microchannel with monodisperse colloidal silica packing was formed on a cyclic olefinic copolymer microchip with two reservoirs on both ends. Silver-cemented silica packing frit structure was formed at the entrance of the microchannel by electroless plating treatment as a base layer. A gold coating was formed on it by reducing $Au^{3+}$ to gold with hydroxylamine. Finally micro-SPE bed was formed by self-assembly adsorption of 1-dodecanethiol on it. Micro-SPE beds were about 100-150 ${\mu}m$ long. Approximately $10^3$ fold sensitivity enhancements for Sulforhodamine B, and Fluorescein in nM concentration levels were possible with 80 s preconcentration. Basic extraction characteristics were studied.

• Journal of Yeungnam Medical Science
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• v.20 no.1
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• pp.45-52
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• 2003

Background: Immediate implant placement has become an acceptable treatment for the edentulous area. The advantages of the immediate implant placement include considerable decrease in time from tooth extraction to placement of the finial prosthesis, fewer surgical procedures, and better acceptance of the overall treatment plans. But the success is dependent on the quantity and quality of the extraction socket. The purpose of this study is to evaluate the success of the immediate implant placement. Materials and Methods: Twenty-one sites in 16 patients were selected for the evaluation of the immediate implant placement. All of the cases were followed using clinical and radiographic examinations. Criteria of success were the absence of peri-implant radiolucency, mobility, and persistent pain or sign of infection. Results: Of the 21 implants, 13 implants have been succeeded. Of the 13 implants, 10 implants were replaced for the periodontal disease and 3 implants were replaced for the trauma. Conclusion: The criteria of the success in immediate implant placement are as follows. 1) Implants placed into fresh extraction sockets have a high rate of survival. 2) Implant should be placed as close as possible to the alveolar crest. 3) Implant placed into available bone beyond the apex have a high success rate.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.5
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• pp.638-648
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• 2004

In many drinking water treatment plants, chlorination process is one of the main techniques used for the disinfection of water. This disinfecting treatment leads to the formation of haloacetic acid (HAAs). In this study, headspace solid-phase microextraction (HS-SPME) was studied as a possible alternative to liquid-liquid extraction for the analysis of HAAs in drinking water. The method involves direct derivatization of the acids to their methyl esters without methyl tert-butyl ether (MTBE) extraction, followed by HS-SPME with a $2cm-50/30{\mu}m$ divinylbenzene/carboxen/polydimethylsiloxane fiber. The effects of experimental parameters such as selection of SPME fiber, the volume of sulphuric acid and methanol, derivatization temperature and time, the addition of salts, extraction temperature and time, and desorption time on the analysis were investigated. Analytical parameters such as linearity, repeatability and limit of detection were also evaluated. The $2cm-50/30{\mu}m$-divinylbenzene/carboxen/polydimethylsiloxane fiber, sulphuric acid of 1ml, methanol of 3ml, derivatization temperature of $50^{\circ}C$ derivatization time of 2hrs, sodium chloride salt of 10g, extraction time of 30 minutes, extraction temperature of $20^{\circ}C$ and desorption time of 1 minute at $260^{\circ}C$ were selected as the optimal experimental conditions for the analysis of HAAs. The linearities ($r^2$), relative standard deviations (%RSD) and limits of detection (LOD) for HAAs were 0.9978~0.9991, 1.1~9.8% and $0.05{\sim}0.2{\mu}g/l$, respectively.

• Korean Journal of Organic Agriculture
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• v.8 no.1
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• pp.89-99
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• 1999

To do mass multiplication of plug seedlings in potatoes, apical stem cuttings originated from virus-free microtubers were cut to one-two internodes and transplanted into the plug-tray. After 10days, we applied Chitosan and Wood Extraction on rooting and tuber formation of plug seedlings. To improve field adaptability of plug seedlings, rooted cuttings with a height of 20cm after 20days of cutting were transplanted ito the fields, We applied 500~2000ppm Chitosan on growth characteristics and tuber formation of that. The above and underground growths, such as plant height and number of leaves were significantly more vigorous after treatment with 500~1,000ppm Chitosan and 2,000ppm Wood Extraction, the spray treatment was carried out five times at intervals of four days after ten days of transplanting. T-N, K, P, Mg and Na, were higher as the concentrations of chitosan and Wood Extraction were higher. The growth and tuber yield in plug seedlings planting plot and seed potatoes planting plot were effectively highter as foliar application of Chitosan(500~2,000ppm) was done after planting the plot. T-N content in leaves and tuber was higher as the concentration of Chitosan was high. A similar tendency was shown in K, P and Mg. In the small tuber(under 30g), the number of tubers and tuber yield were relatively increased in the seed potatoes planting plot, but the large tubers(over 80g) yield was higher in the plug seedlings planting plot, and in order to increase tuber yield in plug seedlings it was necessary to add plant density to the field.

• The Journal of Internal Korean Medicine
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• v.31 no.3
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• pp.415-424
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• 2010

Objectives : This study was performed to investigate the anti-fibrogenic effect of Angelica Gigantis Radix on cultured rat hepatic stellate cells. Materials and Methods : Hepatic stellate cells(HSC-T6) were treated with various concentrations of Angelica Gigantis Radix extract for both 24 and 48 hours. The extraction was done either with distilled water or 80% EtOH. After the treatment, cell viability, cell proliferation, procollagen production and the mRNA expression of the ASMA, TIMP1, TIMP2, procollagen Type 1a2, and Cytokine IL-6 production were measured by using MTT assay, BrdU assay, RT-PCR, procollagen Type I C-peptide EIA and IL-6 ELISA assay. Results : The cell viability treated with water extraction was significantly increased, but there were no significant changes treated with 80% EtOH extraction. The cell proliferation treated with water extraction decreased only in the 24 hours group, while there were significant decreases either in the 24 and 48 hours groups treated with 80% EtOH extraction. The mRNA expressions of the ASMA, TIMP2 and procollagen 1a2 decreased in a concentration-dependent manner in the 48 hours group. Procollagen production decreased in a concentration-dependent manner in both the 24 and 48 hours groups. Cytokine IL-6 production increased in a concentration-dependent manner in both the 24 and 48 hours groups. Conclusion : These results suggest that Angelica Gigantis Radix is beneficial in the treatment of cirrhotic patients as well as for patients with chronic hepatitis.

• The KIPS Transactions:PartB
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• v.14B no.2
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• pp.71-80
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• 2007

In this paper, We propose face type classification, tongue region extraction and tongue color analysis method for Oriental medicine diagnosis system to supply web based medical treatment information. This presents to construct system that takes super aging society and uses ocular inspection and longue diagnosis in web-based to embody this by an IT Technology as generalization and popularization of medical benefit are social requirement and supplies medical treatment information. Place that reflect living body signal of human body ordinarily and appear becomes iris or tongue, five sensory organs etc. This paper proposes classification of face type, extraction of five sensory organs for observing a person's shape and color among diseases diagnosis based on home health care that propose to develop and region extraction and color analysis etc, of tongue which intensively represents the bio-signals of human-beings. Finally, the effectiveness of this paper is verified by several experiments.