• The Journal of the Korea Contents Association
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• v.21 no.2
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• pp.68-77
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• 2021

The purpose of this study is to The exhibition's service quality was divided into three factors: event content, publicity, and empathy. First, the exhibition's service quality had positive effects on visitors' perceived value and overall satisfaction. Visitors' perceived value also showed a positive effect on their overall satisfaction. Second, each of visitors' perceived value and overall satisfaction had positive effects on their loyalty. Third, in effect decomposition, the total effect of the exhibition's service quality on visitors' perceived value was largest, followed by the service quality's total effect on their overall satisfaction and the service quality's total effect on their loyalty in order. In addition, statistically significant total effects were found between visitors' perceived value and overall satisfaction, as well as between visitors' perceived value and loyalty. As a result, mediating effects such as visitors' overall satisfaction had a positive contribution. Accordingly, statistically significant effects were confirmed in the relationships between all endogenous and exogenous variables.

• Journal of Physiology & Pathology in Korean Medicine
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• v.16 no.2
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• pp.296-302
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• 2002

Bohyulmyunyuk-dan is an Oriental herbal formulation to enhance the general body conditions as well as immune response against both endogenous and exogenous harmful challenges. This study was designed to investigate the effect of Bohyulmyunyuk-dan on the cisplatin-induced toxicity of primary rat astrocytes and C6 glioma cells. After trestment of astrocytes and C6 glioma cells with cisplatin, MTT assay was carried out to measure cytotoxicity of brain cells. To explore the mechanism of cytotoxicity, astrocytes were treated with Bohyulmyunyuk-dan and followed by the addition of cisplatin. Then, the protective effects of Bohyulmyunyuk-dan were investigated in apoptosis signaling pathway. The results were obtained as follows ; Bohyulmyunyuk-dan protected the death of astrocytes by cisplatin, which decreased the viability of astrocytes and C6 glioma cells in a time- and dose-dependent manner. Bohyulmyunyuk-dan protected the apoptotic death of astrocytes from cisplatin induced cell apoptosis. Bohyulmyunyuk-dan inhitited the activation of caspase-3 and -9 protease in astrocytes by cisplatin. Bohyulmyunyuk-dan inhibited the deavage of PARP in astrocytes by cisplatin. According to above results, Bohyulmyunyuk-dan may prevent brain cells from cytotoxicity induced cell apoptosis induced by chemotherapeatic agents induding displatin.

• Environmental Analysis Health and Toxicology
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• v.15 no.3
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• pp.69-80
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• 2000

ADP-rubosylation may be involved in the process of macrophage activation. Nitric oxide (NO) has emerged as an important intracellular and interacellular regulatory molecule with function as diverse as vasodilation, neural communication or host defense. NO is derived from the oxidation of the terminal guanidino nitrogen atom of L-arginine by the NADPH -dependent enzyme, nitric oxide synthase (NOS) which is one of the three different isomers in mammalian tissues. Since NO can exert protective or regulatory functions in the cell at a low concentration while toxic effects at higher concentrations, its role may be tightly regulated in the cell. Therefore, this paper was focused on signal transduction pathway of NO synthesis, role of endogenous TGF-$\beta$ in NO production. effect of NO on superoxide formation. Costimulation of murine peritoneal macrophages with interferon-gamma (IFN-γ) and phorbol 12-myristate 13-acetate (PMA) increased both NO secretion and mRNA expression of inducible nitric oxide synthase (iNOS) when PMA abolished costimulation. Pretreatmnet of the cells with PMA abolished costimuation effects due to the depletion of protein kinase C (PKC) activities . The involvement of PKC in NO secretion could be further confirmed by PKC inhibitor, stauroprine, and phorbol ester derivative, phorbol 12,13-didecanoate. Addition of actinomycine D in IFN-γ plus PMA stimulated cells inhibited both NO secretion and mRNA expression of iNOS indication that PMA stabilizes mRNA of iNOS . Exogenous TGF-$\beta$ reduced NO secretion in IFN -γ stimulated murine macrophages. However addition of antisense oligodeoxynucleotide (ODN) to TGF-$\beta$ to this system recovered the ability of NO production and inhibited mRNA expression of TGF-$\beta$. ACAS interactive laser cytometry analysis showed that transportation of FITC -labeled antisense ODN complementary to TGF-$\beta$ mRNA could be observed within 5 min and reached maximal intensity in 30 min in the murine macrophage cells. NO released by activated macrophages inhibits superoxide formation in the same cells . This inhibition nay be related on NO-induced auto -adenosine diphosphate (ADP) -ribosylation . In addition, ADP-ribosylation may be involved in the process of macrophage activation .

• Journal of Gifted/Talented Education
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• v.25 no.4
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• pp.529-546
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• 2015

The purpose of the present study was to verify the structural relationship among task commitment, self regulation learning ability, parent support, satisfaction and achievement in gifted education. In this study, factors affecting the performance of gifted education are based on Differentiated Model of Gifted and Talent($Gagn{\acute{e}}$, 2004). Participants attended a 182 student in institutes for the gifted education in the city office of education in Korea. A hypothetical model was proposed, which was composed of task commitment, self regulation learning ability and parent support as exogenous variables; and satisfaction and achievement as endogenous variables. The results of this study are as follows: First, task commitment, self regulation learning ability and parent support had significant effects on gifted education's satisfaction. Second, task commitment and parent support had significant effects on gifted education's achievement.

• Journal of the Korea Society of Computer and Information
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• v.12 no.5
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• pp.243-251
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• 2007

The purpose of this study propose and empirically assessed Internet Banking success model. This was derived through an analysis of the quality evaluation factors of Internet Banking services and review of TAM model, IS success model, e-Commerce success model literature. The research model consists of exogenous variables(ease of use, economic benefits, safety) and endogenous variables (usefulness, user satisfaction, trust, behavioral intention to use). The analysis results revealed that ease of use is a very significant factor influencing usefulness and user satisfaction, trust. Safety is a significant factor influencing trust. Economic benefits and usefulness, trust are significant factors influencing user satisfaction. Usefulness and user satisfaction are significant factors influencing behavioral intention to use. This study provide the initiative of Internet Banking success model. Internet banking firms will support the competitive service through strategic qualify evaluation and improvement using Internet Banking success model.

• Journal of Korean Academy of Nursing
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• v.48 no.6
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• pp.731-742
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• 2018

Purpose: The purpose of this study was to test a hypothesis explaining direct and indirect relationships among the factors affecting self-care behaviors of kidney transplant patients, based on self-determination theory. Methods: Data were collected from 222 outpatients with kidney transplantation. The endogenous and exogenous variables of the hypothetical model consisted of healthcare provider's autonomy support, duration after kidney transplantation, basic psychological need satisfaction, autonomous and controlled motivation, depression, and self-care behaviors. Collected data were analyzed using SPSS/WIN 24.0 and AMOS 24.0. Results: The hypothetical model demonstrated a good fit: RMSEA=.06, SRMR=.04, TLI=.94, CFI=.97. Statistically significant explanatory variables for the self-care behaviors of kidney transplant patients were duration after transplantation and basic psychological need satisfaction. Healthcare provider's autonomy support was indirectly significant, while autonomous motivation, controlled motivation and depression were not statistically significant for self-care behaviors. The variables accounted for 59.5% of the self-care behaviors of kidney transplant patients. Conclusion: It is necessary to develop an autonomy support program for healthcare providers to enhance the self-care behaviors of kidney transplant patients. Preventing the deterioration of self-care behaviors will be possible by conducting this program at one year and six years post-transplantation. In addition, the results suggest the need to developing personalized autonomy support programs for healthcare providers that can meet the basic psychological need satisfaction of kidney transplant patients.

• Archives of Pharmacal Research
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• v.24 no.6
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• pp.607-612
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• 2001

Endogenous carbon monoxide (CO) shares with nitric oxide (NO) a role as a putative neural messenger in the brain. Both gases are believed to modulate CNS function via an increase in cytoplasmic cGMP concentrations secondary to the activation of soluble guanylate cyclase (sGC). Recently CO and NO were proposed as a possible mediator of febrile response in hypothalamus. NO has been reported to activate both the constitutive and inducible isoform of the cyclooxygenase (COX). Thus, we investigated whether CO arising from heme catabolism by heme oxygenate (HO) is involved in the febrile response via the activation of COX in the hypothalamus. $PGE_2$ which is a final mediator of febrile response released from primary cultured hypothalamic cells was taken as a marker of COX activity. $PGE_2$ concentration was measured with EIA kits. Exogenous CO (CO-saturated medium) and hemin (a substrate and potent inducer of HO) evoked an increase in $PGE_2$ release from hypothalamic cells, and these effects were blocked by methylene blue (an inhibitor of sGC). And membrane permeable cGMP analogue, dibutyryl-cGMP elicited significant increases in $PGE_2$release. These results suggest that there may be a functional link between HO and COX enzymatic activities. The gaseous product of hemin through the HO pathway, CO, might play a role through the modulation of the COX activity in the hypothalamus.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.3
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• pp.298-310
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• 2021

Freshwater eel Anguilla japonica is a commercially important species in East Asia. However, given the continuously decreasing resources due to many problems as climate change, habitat destruction and overfishing, mass seed production is crucial. In particular, the eel larvae present a unique life history, spending prolonged periods in the Pacific Ocean. Therefore, finding suitable feed that lasts through the long larval stages is rather difficult. In the present study, we histologically observed the development of digestive organs for 50 days after hatching (DAH). The endogenous reserves were completely absorbed at 7 DAH, and the first exogenous feeding started thereafter. The teeth appeared at 4 DAH and dramatically changed from needle-like to broad-based types by 50 DAH. The intestine remained as straight gut until 50 DAH. The intestinal cilia appeared first at 6 DAH and their density continuously increased thereafter. Interestingly, goblet cells appeared in the intestine, but not in the esophagus, where these cells are commonly observed in other teleosts. In addition, high amounts of eosinophil substances, assumed to be zymogen granules, accumulated in the pancreas, suggesting a specific digestive strategy of this species. Overall, these observations largely update the previous reports and can be useful to improve A. japonica seed production.

• Journal of Digital Convergence
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• v.13 no.4
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• pp.89-100
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• 2015

This study focused on analyzing the effects of characteristics of marketing mix on brand image, perception, switching barrier and loyalty of authorized dealers in the Korean CCTV converging channels. This study formulated a structural equational model, in which characteristics of marketing mix was adapted as an exogenous variable and in which brand image, perception of authorized dealer, switching barrier were included as mediator variables, having influences to the endogenous variable such as loyalty of authorized dealers. In this study, 8 hypotheses were formulated, on which this research models were based, in order to test the significance of mediator effects, suggested in the previous articles, that having high significance. This study collected the effective questionnaires of 191 respondents who were the authorized dealers in nationwide and then analyzed with AMOS20 and SPSS20 to test the hypotheses. This study concluded as follows: Product and price in marketing mix had a significant effect on the brand image but only advertising had some effects on the perception of providing parties.

• Journal of Chest Surgery
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• v.28 no.3
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• pp.221-227
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• 1995

Malignancy is one of the several exogenous and endogenous factors that increase serum alpha 1-PI. In fact, serum levels of alpha 1-PI were significantly elevated in the patients with the nonresectable bronchogenic cancer. the purpose of this work was to determine if the immediate postoperative change of serum alpha 1-PI level following tumor resection relates to the patient`s postoperative course. Clinical experimental study was carried out to investigate the postoperative changes of serum alpha 1-PI level following operation for 20 cases of bronchogenic cancer and 10 cases of control, nephrectomy patients Alpha 1-PI concentrations in serum was quantitated by use of radial immunodiffusion technique.The results were as follows ; Preoperative serum level of alpha 1-PI was significantly elevated in patients with bronchogenic cancers [p < 0.001 , when compared to normal control levels. Immediate postoperative serum alpha 1-PI level was significantly increased in patients with bronchogenic cancer [p < 0.05 , but slightly decreased at control groups. The peak serum level of alpha 1-PI was the postoperative three days, and then gradually decreased at the 5, 9, 14 days, but slightly elevated comparing to preoperative alpha 1-PI levels. Serum alpha 1-PI level in patients with adenocarcinoma was elevated, when compared to squamous cell carcinoma, but not significantly. According to the stages of the bronchogenic cancer, each levels of the serum alpha 1-PI were slightly different, but the whole postoperative changes were the general similarity. There were no significant difference in changes of the serum alpha 1-PI level, according to the operative procedures. As the alpha 1-PI is acute reactant, that it was required at the reoperative state of the bronchogenic cancer and rapid response, consumption or requirement were occurred, postoperatively. Therefore, alpha 1-PI can be perioperative indicator for the evaluation of the bronchogenic cancer.