• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.224-227
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• 2012

In the Cluster-Based Routing Protocol (CBRP), a cluster header in each cluster is selected. The cluster headers consume energy much more than other nodes because they manage and operate all of mobile nodes in their cluster. The traditional CBRP selects a cluster header without considering the remaining energy of each node. So, there exists problems that the cluster header has short average lifetime, and another cluster header should be selected frequently. In this paper, we propose the advanced protocol which prolongs the lifetime of the cluster header and enhances the stability of the path. In order to achieve this, when a cluster header is elected in a cluster, the remaining energies of all of nodes are compared with one another, and the node with the highest energy is selected as the cluster header.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.6
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• pp.1173-1178
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• 2012

In the Cluster-Based Routing Protocol (CBRP) a cluster header in each cluster should be elected. The cluster headers consume energy much more than other nodes because they manage and operate all of mobile nodes in their cluster. The traditional CBRP elects a cluster header without considering the remaining electric energy of each node. So, there exists problems that the cluster header has short average lifetime, and another cluster header should be elected again frequently. In this paper, we propose the improved protocol which prolongs the lifetime of the cluster header and enhances the stability of the path. In order to achieve this, when a cluster header is elected in a cluster, the remaining electric energies of all the nodes are compared with one another, and the node with the highest energy is elected as the cluster header.

• Food Science and Preservation
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• v.13 no.2
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• pp.168-173
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• 2006

To investigate the effect of grapefruit seed extract pretreatment and packaging materials on the quality of dried persimmon, dried persimmons were stored for $60{\sim}100$ days at room temperature $(15^{\circ}C)$ after dipping in grapefruit seed extract and then packing with LDPE (low density polyethylene) film and Nylon/LDPE film pouch $(30{\times}30cm^2)$. Weight loss of dried persimmon packaged with Nylon/LDPE film was not exceeded 86% of control. 60% mold occurrence and 50% browness were observed compared to control. There were no significant differences in the firmness, soluble solid content and color between grapefruit seed extract pretreatment and control. Grapefruit seed extracts pretreatment had an effect on the inhibition of color change in Hunters value.

• Korean Journal of Veterinary Research
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• v.44 no.1
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• pp.41-47
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• 2004

The alkaline single-cell gel electrophoresis (SCGE) assay, called the comet assay, has been applied to detect DNA damage induced by a number of chemicals and biological factors in vivo and in vitro. The DNA damage was analysed by tail moment (TM) and tail length (TL), which were markers of DNA strand breaks in SCGE. Human, mouse and rat peripheral blood lymphocytes (PBLs) were irradiated with different doses of $^{60}Co$ ${\gamma}$-rays, e.g. 1, 2, 4, and 8 Gy at a dose rate of 1 Gy/min. A dose-dependent increase in TM (p<0.01) and TL (p<0.01) was obtained at all the radiation doses (1-8 Gy) in human, mouse and rat PBLs. Mouse PBLs were more sensitive than human PBLs which were in turn more sensitive than rat PBLs when the treated dosages were 1 and 2 Gy. However, human PBLs were more sensitive than mouse PBLs which were in turn more sensitive than rat PBLs when the irradiation dosages were 4 and 8 Gy. Data from all three species could be fitted to a linear-quadratic model. These results indicated that there may be inherent differences in the radio-sensitivity among PBLs of mammalian species.

• Korean Journal of Veterinary Research
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• v.47 no.1
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• pp.19-24
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• 2007

The cause and pathogenesis of inflammatory bowel disease remain unknown and no definitetherapy exists until now. The present study was conducted to investigate the anti-inflammatory effectsof a herbal preparation (HemoHIM) in colitis induced by 30 mg of trinitrobenzene sulfonic acid (TNBS)in rats. Sprague-Dawley rats were divided into 5 groups. Each group was treated with 1 mg ofHemoHIM/ml of drinking water, 4 mg of HemoHIM/ml of drinking water, 50 mg of HemoHIM/kgof body weight (i.p. once every other day) or 10 mg/kg of HemoHIMof body weight (i.p. onceevery other day) from the next day. After 2 weeks, rats were sacrificed and morphologic featuresof colons were examined. Ulceration, adhesion, thickening and dilatation were noticed in the colonicmucosa after TNBS instillation. Intraperitoneal injection of HemoHIM (50 and 100 mg/kg of bodyweight) showed the anti-inflammatory effect on adhesion, thickening, dilatation, ulceration, and theinhibition effect on damage score by 72.7% and 90.9%, respectively. Histologically, the colon of TNBS-treated rat showed inflammatory cell infiltration by polymorphonuclear cells, multiple erosive lesionsignificant improvement in these symptoms. The results obtained suggest marked anti-inflamatoryactivity of the HemoHIM at the dose levels examined.

• Journal of the Korean Dietetic Association
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• v.17 no.3
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• pp.229-242
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• 2011

The purpose of this study was to investigate the status of the safety system and safety education in institutional foodservices in the Changwon and Masan areas. The survey was conducted from February 1 to March 31, 2009 via questionnaires that were sent to 300 dietitians, and 142 dietitians responded. It was determined that most of the safety managers were 'dietitians (87.1%)', whereas facilities/equipment managers consisted of 'dietitians (45.7%)', 'department of facilities management in the organization (36.4%)' and 'outsourced company of facilities management (17.9%)'. Out of the 11 safety practices, seven safety practices showed less than 50% of total implementation ratio, which meant that the safety systems were not functioning properly. Except for 'non-skid shoes (85.9%)', other safety equipment was seldom used. The survey respondents recognized that safety education was very necessary (4.47 points); however, they responded so-so (3.46 points) to the question of whether or not the actual frequency and time spent on safety education were enough. The average time spent on safety education was 28 minutes 11 seconds. Regarding the difficulties in performing safety education, 'not many safety education materials and media (3.44 points)', 'not many varieties in the subjects and contents for safety education (3.40 points)', and 'not much organizational support on safety education (3.33 points)' showed higher scores than 'lack of education time due to workload (3.20 points)'. The following were cited as education materials that should be developed as it is currently difficult to obtain relevant information and data: 'root causes of musculoskeletal injury and preventive measures (15.8%)', 'healthcare and disease preventive exercises for employees who do simple and repetitive works (14.9%)', and 'instruction on safe handling of chemicals (12.7%)'

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.1
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• pp.149-154
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• 2003

The immunomodulatory activity of PJ-P, a polysaccharide fraction extracted from Paeonia japonica, were reported in our previous paper. In the present study, we investigated that PJ-P inhibited cancer growth through activation of macrophages. The activities of peritoneal macrophage to induce tumor necrosis factor (TNF)-$\alpha$, interleukin-1 (IL-1)$\beta$, interleukin-6 (IL-6) and interleukin-12 (IL-12) as well as to ingest fluorescence-latex microbeads were enhanced by treatment of PJ-P. Direct cytocidal activity of PJ-P against cancer cells was not shown. However, in vitro, peritoneal macrophages treated with PJ-P had an activity to kill cancer cells. Furthermore, PJ-P significantly prolonged the survival of mice implanted intraperitoneally with B16F0 mel-anoma cells. These results suggest that PJ-P could be a useful immunomodulator and assistant of anti-tumor agent.

• Journal of Environmental Policy
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• v.8 no.3
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• pp.115-138
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• 2009

The purpose of this paper is to clarify the main components of economic growth and the effects of environmental factorson productivity by comparing traditional productivity growth and environmentally-adjusted productivity growth in 28 Chinese regions based on growth accounting analysis. To do this, we measured the shadow prices of SOx for the 28 Chinese regions. This study found that the annualized growth rate of output in the 28 Chinese regions was almost 10.07% for 1999-2005, though the growth rate was higher in the eastern region than in the middle and western regions. The average traditional productivity was 3.58%, again with the eastern region showing the highest level. The average environmentally-adjusted productivity of the three regions was about 3.56%, which is similar to the level of traditional productivity. This implies that activities regarding pollution reductions in the 28 Chinese regions have not been practiced, even though environmental regulations have been strengthened. Therefore, the regional and central governments should strengthen environmental regulations and strictly enforce them.

• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.1
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• pp.134-139
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• 2000

Angelica gigas Nakai (danggui) is a popular herb which has been used as a blood-building decoction for recovery from weakness in the Chinese medicine. Its demand increased in functional foods and pharmaceutical industries. For its hygiene, fumigation has been used, but the use of fumigants are going to be prohibited for food processing. In order to investigate gamma irradiation technique for hygiene of danggui, the immunomodulation activity of danggui after irradiation was examined. The water extract of irradiated danggui showed a strong mitogenic effect on splenocytes in vitro to the same level of lipopolysaccharide (LPS) and phytohemagglutinin (PHA). The effect was not different from that of non-danggui. It was tested whether there was any difference between irradiated and non-irradiated danggui in effects on the secretion of antibodies and graft versus host reaction in vivo. It turned out that intraperitoneal (i.p.) administration of the extract of irradiated danggui for 4 days remarkably increased the number of antibody-secreting cells in mice injected with sheep red blood cells (SRBC). Splenomegaly, due to graft versus host reacton, was also increased after 7 days i.p. administration of the extract of danggui in mice injected with allogeneic splenocytes. In these two in vivo test, the effect were not different from those of non-irradiated danggui. These results indicated that immunomodulation activity of danggui might be preserved after irradiation. In the other experiments (data not shown), the irradiated danggui was stable in active component analysis and safe in genetic toxicity test. In further research, the stability in other physiological activity of irradiated danggui will have to be proved before practical application of irradiation for hygiene.

• YAKHAK HOEJI
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• v.40 no.5
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• pp.591-598
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• 1996

The water extracts of ten crude drugs were tested for the spasmolytic and anti-peptic ulcer activities on rat ileum smooth muscle contraction and aspirin-induced acute hemorrhag ic erosive gastritis respectively. The water extract of Aurantii immaturi pericarpium(AIP)($IC_{50}=1.5{\times}1O^{-2}$g/l), Aurantii nobilis pericarpium(ANP)($IC_{50}=2.5{\times}1O^{-2}$g/l), Cyperi rhizoma(CR)($IC_{50}=3.3{\times}1O^{-2}$g/l). Linderae radix(LR) ($IC_{50}=6.8{\times}1O^{-2}$), Aurantii fructus immaturus(AFI)($IC_{50}=11.8{\times}1O^{-2}$), Saussureae radix(SR)($IC_{50}=13.2{\times}1O^{-2}$g/l) and Ponciri fructus(PF)($IC_{50}=23.3{\times}1O^{-2}$g/l) showed inhibitory activity on the isometric contraction of rat ileum smooth muscle induced by electrical stimulation in a concentration-dependent manner, whereas the water extracts of Arecae pericarpium(AP), Agastachis herba(AH) and Magnoliae cortex(MC) potentiated the isometric contraction. In the aspirin-induced acute gastritis, the water extracts of MC, AP and CR reduced significantly the gastric juice secretion, gastric juice acidity and pepsin activity. They also showed protective activity of gastric mucosal layer from erosion and petichial hemorrhage in gross and histological examination.