• 한국임상수의학회지
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• 제20권2호
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• pp.198-206
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• 2003

The purpose of the present study was to investigate the effect of polyphosphate on healing of skin wound in rabbits. Four skin wounds of 8mm in diameter were induced bilaterally(4 wounds/rabbit) on the dorsolateral aspect of the trunk of 15 male New Zealand white rabbits. Ten percent polyphosphate(poly P) type 25, 10% poly P type 35, 10% poly P type 25+10% poly P type 35 and 0.85% sterile saline solution were applied on the wound area and examined grossly and histopathologically. The rate of wound contraction and histopathological changes after poly P application on the skin wound were investigated. In gross findings, the wound contraction rates of 10% poly P 25 group were significantly decreased from day 2 to day 7 after operation than those of 0.85% sterile saline solution treated group (p < 0.01). Although the hemorrhage and inflammation were observed on days 3, 6 and 9 after operation in all groups, but in 10% poly P 25 was gradually decreased. Revascularization and reepithelialization were seen 3, 6 and 9 days after operation in all groups, especially in 10% poly P 25 was formed completely on 9 days. Fibroplasia were seen 3. 6 and 9 days after operation in all groups, especially in 10% poly P 25 was compact than other groups on 9 days. The results suggested that polyphosphate, especially 10% poly P 25 would be effective on healing of skin wound in rabbits through decrease of would contraction rate, increase of revascularization, reepithelialization and fibroplasia.

• 한국연초학회지
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• 제20권2호
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• pp.218-224
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• 1998

Long-term exposure of cigarette smoke or air pollutants to human can induce damages in the airway mucociliary function and can be closely related to the irritation and sputum formation in the respiratory system. This study was undertaken to investigate whether rat trachea can be used as a tool for evaluating the cigarette smoke quality. It was identified that, through the examination with inverted microscope, ciliary beating in 1 mm long cut of nat trachea ring was continued for at least 48 hours in saline solution at $25^{\circ}C$. The ciliostasis time in a KCN solution as a positive control was decreased with increasing the concentration of KCN. There were no significant differences in the ciliostasis time by body weight and individual variation of rats. Ciliotoxicity of whole smoke trapped in saline was not significantly changed by aging for more than 6 hrs. The ciliostasis time was in inverse proportion to the number of sample cigarettes applied. As moisture in the cigarette was increased, ciliostasis time was linearly increased. Therefore, these data indicate that the ciliotoxicity test using rat trachea in vitro can be applied to evaluate the cigarette smoke quality and to search factors for the irritation and sputum formation by cigarette smoke as well as air pollutants.

• 동아시아식생활학회지
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• 제19권3호
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• pp.375-383
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• 2009

This study was conducted to measure the total polyphenol contents and DPPH radical scavenging activities of different potato plants parts, varieties, and grades, and by distribution and different cooking conditions. The results were as follows. For the plant parts, total phenolic content and DPPH radical scavenging activity were highest in the flowers followed by leaves and stems, respectively. Among 5 potato varieties, 'Jasim' had the highest DPPH radical scavenging activity and the activity of its pulp was lower than that of its cortex(peel). Regardless of potato grade, the cortexes(peel) of samples had two-fold higher DPPH radical scavenging activity than pulp, and the Grade SS potato had the highest phenolic content. It was also found that the bud ends and stem ends had comparably larger amounts of phenolic compounds in horizontally cut potatoes. Finally, the descending order for DPPH radical scavenging activity, according to different cooking conditions, was as follows: gas oven range-baking, frying, microwave-heating, sauteing, boiling in 1% saline solution, steaming, and boiling in 3% saline solution.

• 대한임상독성학회지
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• 제5권2호
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• pp.119-122
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• 2007

Paraquat poisoning is a fatal type of herbicide intoxication. It is characterized by multi-organ failure and pulmonary fibrosis with respiratory failure. Intravenous and intramuscular injection of paraquat is rarely described. However, We encountered two fatal cases of acute poisoning caused by paraquat injection. Two patients were admitted to our emergency unit after intravenous and intramuscular injection of 23.8% paraquat (about 476 mg of paraquat). A 37-year-old man diluted 2 ml of 23.8% paraquat solution with 1 ml of normal saline and injected it both intravenously into his left antecubital fossa and intramuscularly into his abdomen in a suicide attempt. He died 5 days later from respiratory failure and acute renal failure. A 92-year-old man was injected intravenously into his right antecubital fossa by his grandson with 2 ml of 23.8% paraquat solution diluted with 1 ml of normal saline. He died 2 days later from early circulatory collapse and multi-organ failure (metabolic acidosis, acute renal failure, coagulopathy). Intravenous and intramuscular injection with a small quantity of paraquat resulted in fatal toxicity in our patients.

• Restorative Dentistry and Endodontics
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• 제47권3호
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• pp.30.1-30.15
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• 2022

Objectives: This study aimed to evaluate the effectiveness of final irrigation with cold saline solution after endodontic treatment compared with saline solution at room temperature against postoperative pain following endodontic treatment. Materials and Methods: A broad search was performed in the PubMed, Web of Science, Scopus, Cochrane Library, Virtual Health Library (LILACS), and Grey Literature databases. Two independent reviewers performed data extraction, risk of bias using the Cochrane methodology, and certainty of evidence using the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach. Results: Eight studies were included in qualitative synthesis. Intracanal cryotherapy favored the reduction of postoperative pain in the systematic review. Four studies were included in meta-analyses. The meta-analysis showed that intracanal cryotherapy reduced postoperative pain in teeth with symptomatic apical periodontitis (SAP) at 24 hours. There was no association between intracanal cryotherapy and control (room temperature) groups in teeth with normal periapical tissue with respect to postoperative pain at 24 hours and 48 hours. Conclusions: Intracanal cryotherapy was effective in reducing postoperative pain after endodontic treatment in teeth with SAP.

• 대한간호학회지
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• 제26권2호
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• pp.428-442
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• 1996

Stomatitis is a common toxicity associated with the administration of certain cancer chemotherapeutic agents used in the treatment of malignant tumors. It represents one of the most distressing side effects of cancer chemotherapy and can interfere with the patient's ability to eat, be the cause of much pain and discomfort, and require the use of potent analgesics. The situation also creates favorable conditions for local infection which may lead to septicemia. Several authors have identified the need to establish protocols for the control and treatment of the oral discomfort associated with oral mucositis as a result of chemotherapy. Thus this study attempted to development of oral care protocol for chemotherapy patients. The effects of the mouth care using sterile normal saline, nystatine solution on oral stomatitis were investigated in 30 patients on chemotherapy. The subsect were divided into three groups : control group : not gargling experimental group A : normal saline gargling (4 times a day) experimental group B : nystatine solution gargling(4 times a day) The Oral Assessment Guide (OAG) was used to assess oral status three times(once in the prechemotherapy period, on 5th, 10th day of post chemotherapy) Oral culture was used to assess oral infection on 5th day of postchemotherapy. Data was analyzed on SAS program which used repeated ANOVA, t-test, X/sup²test. The results are as follows : 1. The incidence of stomatitis was higher in the control group and experimental group A than in experimental group B.（X/sup²＝0.002 P＝0.001）. The grade of stomatitis(mean of total score) for patients in the experimental group B were significantly lower than in the experimental group A F＝1.96 P＝0.0024）. In incidence of tongue change, control group, experimental group B were significantly higher than experimental group B（F＝6.84 P＝0.0039）. In control group and experimental group A. oral infection due to pathogenic bacteria were identified. In conclusion, mouth care with nystatine solution four times a day could reduce the incidence of stomatitis and secondary oral infection due to stomatitis. Thus active mouth care protocol which used to nystatine solution gargling need to prevention of stomatitis in chemotherapy patients.

• Restorative Dentistry and Endodontics
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• 제14권2호
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• pp.49-64
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• 1989

The purpose of this study was to evaluate the effect of several materials on the healing process of apical wound. Sixteen mandibular premolars obtained from 4 healthy dogs were used for this study. Under general anesthesia, the pulpal chamber of each tooth was opened and the pulps were extirpated. The root canals were then instrumented with H-file and irrigated with physiologic saline solution ; the apices were purposely perforated and enlarged with the engine K-reamer. In the experimental groups, apical wounds were filled with one of calcium hydroxide, hydroxylapatite, and tricalcium phosphate materials, mixture of each materials and physiologic saline solution, with a lentulo spiral. In the control group, apical wounds were not filled with any material. All the root canals were filled by the lateral condensation technique with gutta-percha cone and ZOE sealer. The access opening of all the teeth were closed with amalgam. On the 10, 20, 40 and 60th day after experiment, experimental animals were sacrificed. Segments of jaws, each containing one tooth, were fixed in 10% formalin solution and decalcified in Plank-Rychlo solution. The specimens were embedded in paraffin and serially sectioned to an average thickness of $6{\mu}m$. The sections were stained by hematoxylin-eosin and Masson's trichrome stain method and examined under light microscope. The results were as follows : 1. In the experimental groups, the new bone formations were observed in apical wounds. 2. Fourty days later, apical wounds were healed by granulation tissue in the experimental groups, but were not healed by granulation tissue in the control group, and the healing process of experimental groups were more rapid than that of control group. 3. Sixty days later, chronic inflammation disappeared in the experimental groups, and the materials used showed biologic affinity to the periapical tissue. 4. In all the groups, the resorption of cementum appeared on the 10th and 20th day after experiment, and the deposition of cementum appeared on the 40th and 60th day after experiment, especially showing narrowness of apical foramen due to newly formed cementum in calcium hydroxide group. 5. Calcum hydroxide and tricalcium phosphate particles were gradually resolved, but hydroxylapatite particles were not resolved through the experimental period.

• JSTS:Journal of Semiconductor Technology and Science
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• 제7권3호
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• pp.161-165
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• 2007

In this paper, mesoporous Pt on micro pillars Pt electrode is newly designed, fabricated, and characterized on silicon substrate for non-enzymatic electrochemical sensor micro-chip integrated with CMOS readout circuitry. The fabricated micro/nano Pt electrode has cylindrical hexangular arrayed nano Pt pores with a diameter of 3.2 nm which is formed on top of the micro pillars Pt electrode with approximately $6{\mu}m$ in diameter, $6{\mu}m$ in space, and $50{\mu}m$ in height. The measured current responses of the fabricated plane Pt, mesoporous Pt, and mesoporous Pt on the micro pillar Pt electrodes are approximately $9.9nA/mm^2,\;6.72{\mu}A/mm^2,\;and\;7.67{\mu}A/mm^2$ in 10mM glucose solution with 0.1M phosphate buffered saline (PBS) solution, respectively. In addition, the measured current responses of the fabricated plane Pt, mesoporous Pt, and mesoporous Pt on the micro pillar Pt electrodes are approximately $0.15{\mu}A/mm^2,\;0.56{\mu}A/mm^2,\;and\;0.74{\mu}A/mm^2$ in 0.1mM ascorbic acid (AA) solution with 0.1M phosphate buffered saline (PBS) solution, respectively. This experimental results show that the proposed micro/nano Pt electrode is highly sensitive and promising for CMOS integrated non-enzymatic electrochemical sensor applications. Since the micro-pillar Pt electrode can also be utilized with a micro-fluidic mixer in the sensor chip, the sensor chip can be much smaller, cheaper, and easier to be fabricated.

• 약학회지
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• 제45권5호
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• pp.536-544
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• 2001

increase the viability of oral typhoid vaccine during the passage through the castro-intes-tidal tract, numerous attempts have been made including the vaccine coating. However problems such as high death rate during the coating process and its instability in the gastric juice still remain to be solved. In this study, the oral vaccine was made as the micro-enteric beads by adding Salmomella typhi Ty21a cells to sodium alginate solution and spraying onto calcium chloride solution (ionotropic relation method). The vaccine showed more than 90% of its original viability after treating it for 1 hour in the artificial gastric juice (37$^{\circ}C$, 300 rpm). The clearance rate of the Ty21a in the liver and spleen of the mice orally administrated with coated Ty21a was similar to that of the mice intraperitoneally administrated with uncoated Ty21a. The peripheral blood lymphocytes (PBL) isolated from the mice orally administered with this vaccine produced 15.5 fold higher specific IgA antibody titer than that from the control mice administerd with saline solution. furthermore, the mice treated with the coated Ty21a had higher survival rates (50~87%) than the control mice treated with saline solution (0~10%) in the intraperitoneal challenge test with wild type S. typhi Ty21a cells. These results suggest that the alginate-based coating technique is effective to protect live Ty21a from acidic environments, and produces better intestinal immune responses thereby providing a potentially excellent oral typhoid vaccine.

• 한국표면공학회지
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• 제54권5호
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• pp.238-247
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• 2021

PEO (plasma electrolytic oxidation) was applied to modify the surface of AZ31 magnesium alloy in this study. The mixed solution of sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃) was used as the electrolyte, and 0 - 0.05 g/L of Ca-GP (Glycerol Phosphate Calcium salt) was added in the electrolyte as an additive. PEO treatment was conducted at a current density of 30mA/cm² for 5 minutes using a DC power supply. The surface properties were identified by SEM, XRD and surface roughness analyses, and the corrosion resistance was evaluated by potentiodynamic polarization and immersion tests. In addition, the biocompatibility was evaluated by immersion test in SBF solution. As the concentration of Ca-GP was increased, the surface morphology was denser and more uniform, and the amount of Ca and the thickness of oxide layer increased. Only Mg peak was observed in XRD analysis due to very thin oxide layer. The corrosion resistance of PEO-treated samples increased with the concentration of Ca-GP in comparision with the untreated sample. In particular, the highest corrosion resistance was identified at the group of 0.04g Ca-GP through potentiodynamic polarization and immersion tests in saline solution (0.9 wt.%NaCl). During the immersion in saline solution, pH rapidly increased at the beginning of immersion period due to rapid corrosion, and then increase rate of pH decreased. However, the pH value in the SBF temporarily increased from 7.4 to 8.5 during the day, then decreased due to the inhibition of corrosion with HA(hydroxyapatite) formation.