• Korean Journal of Health Education and Promotion
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• v.22 no.4
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• pp.229-244
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• 2005

Objectives: An investigative effort was made to provide basic data upon which effective public health education can be constructed for schools. Methods: The research was made by delivering self-administered questionnaires to 536 men and women with unknown names from a national university during 1-month period on September of 2004. The questionnaire items included preventive attitudes, interests, anxiety, health behavior, consciousness, etc. centering upon life-style related diseases. Results and Conclusions: The preventive attitudes against life-style related diseases was of a higher level in female than male students, The smaller number of students had knowledge of the definition of life-style related diseases, willingness to learn, and gathered information on them. The number of students who had anxiety about them was also small and as low as 54.3% of students were willing to undertake periodic health examination. A great variation ranging from 4.7% to 81.7% was shown in the accuracy rate of answers on the questions asking about three leading causes of death, overconsumption of dietary salt, obesity, diabetes, hypercholesterolemia and colon cancer. With regard to health behaviors, a smaller number of students were involved in health behaviors. On the other hand, $25.7{\sim}35.1%$ of students had everyday exercises and breakfasts, 65.5% had no tobacco use. The study results showed that the survey subjects had deficient knowledge as well as a low level of preventive attitudes and interests against life-style related diseases. Moreover, their health behavior and health consciousness were undesirable apart from their low rates of taking periodic health examinations. Accordingly, the college students should be encouraged to take health education and to make more effective the existing health education in the university.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.773-776
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• 2008

The corrosion of steel in concrete is significant in marine environment. Marine bridges are readily deteriorated due to the exposure to marine environment. Salt damage is one of the most detrimental causes to concrete bridges and port structures. Especially, the splash and tidal zones around water line are comparatively important in terms of safety and life-time point of view. During the last several decades, cathodic protection (cp) has been commonly accepted as an effective technique for corrosion control in concrete structures. Zn-mesh sacrificial anode has been recently developed and started to apply to the bridge column cp in marine condition. The detailed parameters regarding Zn-mesh cp technique, however, have not well understood. This study is to investigate how much Zn-mesh cp influences along the concrete column at elevated temperature. About 100cm column specimens with eight of 10cm segment rebars have been used to measure the variation of cp potential with the distance from Zn-mesh anode at both 10$^{\circ}$C and 40$^{\circ}$C in natural seawater. The cp potential change and current diminishment along the column specimens have been discussed for the optimum design of cp by Zn-mesh sacrificial anode

• Journal of the Korean Society of Food Science and Nutrition
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• v.2 no.1
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• pp.41-47
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• 1973

In the present work, the quality stability of sun-dried Alaska pollack, Theragra chalcogramma, was discussed in the aspects of non-enzymatic discoloration as a function of relative humidity during storage at room temperature$(20^{\circ}C)$. Frozen Alaska pollack was dressed, filleted, dried for 48 hours in the open air, and finally stored in cylindrical acrylic chambers which contained saturated specific salt solutions proposed by Rockland(1960) for humidity control. The color development of the product was analyzed by spectrophotometry at 10 day-intervals during the storage. Lipid oxidation was measured as TBA value at wavelength of 538nm. And browning pigments were extracted, divided into two fractions and measured at 460nm: one was chloroform-methanol (2:1 v/v)soluble fraction attributed to lipid oxidation, and the other was water dialyzed fraction caused by so called Maillard reaction. The TBA value showed a maximum on 30 day storage, hereafter, intended to decrease gradually. On the other hand, the rate of brown pigment development in water dialyzed fractions as well as in chloroform-methanol soluble fractions was lower at 34 to 45%RH than at any other case, and propagation of lipid oxidation was also diminished at the same levels of humidity. From the facts described previously, it is recognized that storage at 34 to 45%RH provides higher quality stability for sun-dried Alaska pollack.

• International Journal of Oral Biology
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• v.32 no.2
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• pp.59-65
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• 2007

It has been well known that excitatory amino acids, primarily glutamate, are involved in the transmission of nociception in pathological and physiological conditions in the spinal and brainstem level. Recently, peripheral glutamate also play a critical role in the peripheral nociceptive transmissions. The present study investigated the role of N-methyl-D-aspartic acid (NMDA) or non-NMDA ionotropic glutamate receptors in formalin-induced TMJ pain. Experiments were carried out on male Sprague-Dawley rats weighing 220-280 g. Intra-articular injection was performed under halothane anesthesia. Under anesthesia, AP-7 (10, $100\;{\mu}M$, $1\;mM/20\;{\mu}L$), a NMDA receptor antagonist, or CNQX disodium salt (0.5, 5, 50, $500\;{\mu}M/20\;{\mu}L$), a non-NMDA receptor antagonist, were administered intra-articularly 10 min prior to the application of 5% formalin. For each animal, the number of behavioral responses, such as rubbing and/or scratching the TMJ region, was recorded for nine successive 5-min intervals. Intra-articular pretreatment with 1 mM of AP-7 or $50\;{\mu}M$ CNQX significantly decreased the formalin-induced scratching behavioral responses during the second phase. Intra-articular pretreatment with $500\;{\mu}M$ of CNQX significantly decreased the formalin-induced scratching behavior during both the first and the second phase. These results indicate that the intra-articular administration of NMDA or non-NMDA receptor antagonists inhibit formalin-induced TMJ nociception, and peripheral ionotropic glutamate receptors may play an important role in the TMJ nociception.

• Journal of Korean Biological Nursing Science
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• v.17 no.3
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• pp.228-235
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• 2015

Purpose: Although the prevalence rate of chronic diseases is rapidly increasing due to an unhealthy diet in Korea, nurses may not have enough nutritional knowledge to educate their patients. This study investigated the level of nurses' nutritional knowledge for chronic diseases as well as for strokes, and the needs for nurses' nutritional education. Methods: This research is a descriptive research conducted from April to August of 2014, on 242 nurses who work with stroke patients, in two tertiary general hospitals in the city of Seoul, South Korea. Results: The average nutritional knowledge score of our subjects was $19.9{\pm}2.51$ (range 12-24). The correct response rate was 83% which was higher than expected. However, many nurses (31-66%) answered incorrectly on items such as 'Drinking low-fat milk is better than whole milk', and 'Seasoning with a large amount of soy sauce instead of salt can reduce sodium consumption'. We also found that nurses who received continuing education regarding nutrition scored higher than those who did not (p=.020). There was no correlation between nutritional knowledge and the need for nutritional education (r=.034, p=.601). Conclusion: The level of nutritional knowledge of the nurses was relatively low and irrelevant to the completion of nutrition courses during university or duration of experience. Rather, the relevance was higher when the nurse received nutrition-related training after graduating from university. Our results imply that continuous nutritional education is necessary for hospital nurses.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.2 no.2
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• pp.87-91
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• 1997

Ecological stability of the Lake Shihwa, artificially made by the construction of the Shihwa Dike, was evaluated by the species composition and variation in biomass of zooplankton. Species composition and seasonal variation in biomass in the seaside stations were similar to those observed in nearby bays and coastal zone. However, those in the lake sites showed very different patterns. The brackish water copepod, Sinocaianus tenellus, held the first rank in every season (with more than 66% in spring, 98% in summer and fall, and 80% in winter). The species composition was very simple and the biomass (in terms of total individuals $m^{-3}$) varied markedly with season up to the order of $10^4$ magnitude. These results imply that the lake ecosystem made by the construction of Sihwa dike is in very unstable stage probably due to the input of industrial wastes as well as unpredictable variation in salt content caused by irregular control of the watergate of the dike and resultant irregular flow direction of the water through the gate.

• Applied Chemistry for Engineering
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• v.7 no.1
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• pp.118-128
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• 1996

N-methyl, N-butyl and N,N-dibutyl chitosan derivatives were prepared by Schiff's base formation and hydrogenation in aqueous media. Furthermore quaternization of the chitosan derivatives was performed in N-methyl-2-pyrrolidone using methyl iodide to obtain water soluble cationic polyelectrolytes. It was confirmed that O-alkylation was occured as well as selective N-alkylation in these reactions. Chitosan and chitosan derivatives with quaternary ammonium iodide showed high flocculation power as the cationic flocculant. When tested on paper mill waste water, they showed high flocculation power, independing of pH range. The flocculation power was increased as the N-alkyl chain length was increased. Among them, N-butyl dimethyl chitosan ammonium iodide showed better flocculation power than chitosan. But, N,N-dibutyl-N-methyl chitosan ammonium iodide showed less flocculation powre than chitosan itself.

• Journal of Life Science
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• v.19 no.10
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• pp.1456-1462
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• 2009

D-chiro-Inositol, which is the isomer of myo-inositol, is a well known drug for the treatment of type II diabetes. The methylated form of D-chiro-inositol, D-pinitol and D-chiro-inositol are synthesized when the plants are exposed to the abiotic stresses such as drought, salinity and low temperature as osmoprotectants. In soybean, myo-inositol is converted to ononitol by O-methyltransferase, and ononitol is converted to D-pinitol by ononitol epimerase and finally converted to D-chiro-inositol by demethylase. However there have been some reports that in buckwheat, myo-inositol can be converted to D-chiro-inositol directly. This study was conducted to determine the changes of soluble cyclitols in buckwheat seedlings after exposure to salt and drought stresses by GC-FID. The results indicated that myo-inositol may be the precursor of D-chiro-inositol biosynthesis.

• Asian Pacific Journal of Cancer Prevention
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• v.13 no.12
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• pp.6005-6010
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• 2012

Background: Nasopharyngeal carcinoma (NPC) is endemic in Southern Chinese and Southeast Asian populations. Geographical and ethnic clustering of the cancer is due to genetic, environmental, and lifestyle risk factors. This case-control study aimed to identify or confirm both genetic and non-genetic risk factors for NPC in one of the endemic countries, Malaysia. Materials and Methods: A panel of 768 single-nucleotide polymorphisms (SNPs) previously associated with various cancers and known non-genetic risk factors for NPC were selected and analyzed for their associations with NPC in a case-control study. Results: Statistical analysis identified 40 SNPs associated with NPC risk in our population, including 5 documented previously by genome-wide association studies (GWAS) and other case-control studies; the associations of the remaining 35 SNPs with NPC were novel. In addition, consistent with previous studies, exposure to occupational hazards, overconsumption of salt-cured foods, red meat, as well as low intake of fruits and vegetables were also associated with NPC risk. Conclusions: In short, this study confirmed and/or identified genetic, environmental and dietary risk factors associated with NPC susceptibility in a Southeast Asian population.

• Journal of the Korean Chemical Society
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• v.28 no.4
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• pp.251-258
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• 1984

The mechanism of photosensitization and the affect of binder on dye-sensitized ZnO have been studied by surface photovoltage spectroscopy. It has been found that the value of energy trapping level $E_{t1}$ on ZnO is 1.12eV (${\lambda$ = 1,100nm) and that of energy trapping level $E_{t2}$ on dye-sensitized ZnO is 0.99eV (${\lambda$ = 1,250nm) which is shifted towards a longer wavelength. The effect of binder on ZnO has been increased the efficiency of surface photovoltage, but it does not effect the values of energy trapping level. The acid-type dyes agree well with the prediction based on an electron transfer mechanism. The desensitization of the Na salt-type dyes for the intrinsic photoresponse of zinc oxide can be explained by energy transfer mechanism. It has been obtained that the dye-sensitized ZnO indicates the possibility of electrophotographic photosensitizer for the infrared range of light.