Background: Nasopharyngeal cancer is a rare disease with a relatively poor prognosis because it tends to be diagnosed at an advanced stage. The aim of this study was to establish the clinical characteristics of nasopharyngeal cancer. Materials and Methods: The medical records of 54 patients with nasopharyngeal cancer from January 1993 to December 2002 were reviewed retrospectively. Forty one cases were male (75.9%) and thirteen were female (24.1%). The average age was of 46.9 (range 16 to 78 years) years. The majority of patients (79.6%) were diagnosed in the advanced stage. The most common complaints were a neck mass (55.5%) and the WHO type III (53.7%) was the most frequent histological type. Results: The cumulative survival rate for a 5-year period was 46.5% and the T stage, N stage, pathologic type, and clinical stage were not significantly related to the survival rate. Sixteen of 54 (31.5%) cases presented with a distant metastasis of the bone, lung, brain, spine, and liver, and six cases (11.1%) presented with a locoregional recurrence. Conclusion: TNM staging is not appropriate for predicting survival rate of nasopharyngeal carcinoma patients. Therefore, a newer staging system, which includes new factors, is needed to predict the prognosis.
Lee, Hee Su;Choi, Jong Myung;Kim, Dae Young;Kim, Seung Yu
Horticultural Science & Technology
/
v.34
no.2
/
pp.220-227
/
2016
The objective of this research was to investigate the influence of application rates of dolomitic lime in the acid substrate on the mitigation of high bicarbonate damage in 'Seolhyang' strawberry. For this purpose, an acid substrate was formulated by mixing of sphagnum peat moss and pine bark with the ratio of 5:5 (v/v). The pH, EC and CEC of the substrate analyzed before application of dolomite were 4.07, $0.46dS{\cdot}m^{-1}$, and $91.3cmol+/kg^{-1}$, respectively. To adjust the pH of substrate, various amounts of dolomitic lime [$CaMg(CO_3)_2$] such as 0 (control), 1, 2, 3, and $4g{\cdot}L^{-1}$ were added during substrate formulation. Then, seedlings with 3 leaf stage were transplanted as mother plants and those were fed with Hoagland solution containing $240mg{\cdot}L^{-1}$ of the $HCO_3{^-}$. The growth parameters of mother plants 140 days after transplanting, such as plant height, chlorophyll content, and fresh weight were the highest in the treatments of 2 and $3g{\cdot}L^{-1}$ of dolomitic lime. The physiological disorders in mother plants were not observed in the 1, 2 and $3g{\cdot}L^{-1}$ treatments, but the symptoms of Ca, K and B deficiencies were observed in the 0 and $4g{\cdot}L^{-1}$ treatments. During the propagation period, the number of daughter plants derived from each mother plant were 21.0, 29.5, 35.8, 27.3 and 16.0 in the treatments of 0, 1, 2, 3 and $4g{\cdot}L^{-1}$, respectively. The substrate pH during cultivation of mother plants were maintained at appropriate levels for the 1 and $2g{\cdot}L^{-1}$ treatments, whereas it was the highest in $4g{\cdot}L^{-1}$ treatment. The contents of macro- and micro-elements in the above ground tissue were the highest in $2g{\cdot}L^{-1}$ and the lowest in $4g{\cdot}L^{-1}$ lime treatments. Above results suggest that the bicarbonate injury originated from ground water can be mitigated by adjusting the amount of dolomitic lime incorporated into the acid substrate.
In the Baekdong-Hongseong area, the southwestern part of the Gyeonggi Massif in Korea, ultramafic rocks occur as lenses within Precambrian granitic gneiss. At Baekdong area, ultramafic lens contains metabasite boudin which had undergone at least three stages of metamorphisms. The mineral assemblage on the first stage, Garnet+Sodic Augite+Hornblende+Plagioclase+Titanite, is recognized from the inclusions in garnet. The second stage is represented by the assemblage in matrix, Garnet+ Augite+Hornblende+Plagioclase, while the third stage is identified by the Hornblende+Plagjoclase $\pm$ Garnet assemblage in the symplectite formed around garnet. The P-T conditions of the first and the third stages are $690-780^{\circ}C$, 11.8-15.9 kb and $490-610^{\circ}C$, 4.0-6.3 kb, respectively. These data indicate that metabasite in Baekdong area had experienced a retrouade P-T path from the eclogite(EG) - high-pressure granulite (HG)-amphibolite (AM) transitional facies to the AM through HG-AM transitional facies. The core and rim of garnet in country granitic gneiss give $605-815^{\circ}C$, 10.7-16.0 kb and $575-680^{\circ}C$, 5.4-7.0 kb, respectively, indicating that the retrograde P-T path of granitic gneiss is similar to that of metabasite. Trace element data reveals that the tectonic setting of metabasite is island uc. The general geology, the metamorphic evolution, the mineral chemistry and the tectonic setting of Baekdong area indicate that the Baekdong-Hongseong area in Korea is a possible extension of the Sulu collision Belt in China. On the other hand, the Sm-Nd whole rock-garnet isochron ages of metabasites are 268.7-297.9 Ma which are older than the ages of UHP metamorphism (208-245 Ma) in the Dabie-Sulu Collision Belt. The older metamorphic ages suggest that collision between Sino-Korea and Yangtz plates may have occurred earlier in Korean Peninsula than China.
The cache size tends to grow in the embedded processor as technology scales to smaller transistors and lower supply voltages. However, larger cache size demands more energy. Accordingly, the ratio of the cache energy consumption to the total processor energy is growing. Many cache energy schemes have been proposed for reducing the cache energy consumption. However, these previous schemes are concerned with one side for reducing the cache energy consumption, dynamic cache energy only, or static cache energy only. In this paper, we propose a hybrid scheme for reducing dynamic and static cache energy, simultaneously. for this hybrid scheme, we adopt two existing techniques to reduce static cache energy consumption, drowsy cache technique, and to reduce dynamic cache energy consumption, way-prediction technique. Additionally, we propose a early wake-up technique based on program counter to reduce penalty caused by applying drowsy cache technique. We focus on level 1 data cache. The hybrid scheme can reduce static and dynamic cache energy consumption simultaneously, furthermore our early wake-up scheme can reduce extra program execution cycles caused by applying the hybrid scheme.
Kim, Jin-Hee;Youn, Mi-Ra;Bang, So-Young;Sim, Ji-Yeon;Kang, Hee-Rae;Yang, Hyun-Won
Development and Reproduction
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v.14
no.4
/
pp.287-295
/
2010
It was recently reported that nesfatin-1/NUCB2, which is secreted from the brain, controls appetite and energy metabolism. The purpose of this research was to confirm whether or not the protein and its binding site should have been expressed in the mouse reproductive organs and to know the possible effects of nesfatin-1 on the reproductive function. Using the ICR female mouse ovary and uterus, the expression of NUCB2 mRNA was confirmed with the conventional PCR and the relative amount of NUCB2 mRNA in the tissues was analyzed with real-time PCR. Immunohistochemical staining was performed using the nesfatin-1 antibody to investigate the nesfatin-1 protein expression and the biotin conjugated nesfatin-1 to confirm the binding site for nesfatin-1 in the ovary. Furthermore, in order to examine if the expression of NUCB2 mRNA in the ovary and uterus is affected by gonadotropin, its mRNA expression was analyzed after PMSG administration into mice. As a result, the expression level of NUCB2 mRNA in the ovary and the uterus was as much as the expression level in hypothalamus. As a result of the immunohistochemical staining, nesfatin-1 proteins were localized at the theca cells, the interstitial cells, and some of the luteal cells. However, the granulosa cells in the follicles did not stain. Interestingly, the oocytes in the some follicles were stained with nesfatin-1. On the other hand, nesfatin-1 protein binding sites were displayed at the theca cells and the interstitial cells near the tunica albuginea. After PMSG administration the expression level of NUCB2 mRNA was increased in the ovary and the uterus. These results demonstrate that for the first time the nesfatin-1 and its binding site were expressed in the ovary and NUCB2 mRNA expression was controlled by gonadotropin, suggesting an important role in the reproductive organs as a local regulator. Therefore, further study is needed to elucidate the functions of nesfatin-1 on the reproductive organs.
Kim Munjo;Im Jeongyeon;Kang Sanggil;Kim Munchrul;Kang Kyungok
Journal of Broadcast Engineering
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v.10
no.1
s.26
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pp.43-56
/
2005
In the existing broadcasting environment, it is not easy to serve the bi-directional service between a broadcasting server and a TV audience. In the uni-directional broadcasting environments, almost TV programs are scheduled depending on the viewers' popular watching time, and the advertisement contents in these TV programs are mainly arranged by the popularity and the ages of the audience. The audiences make an effort to sort and select their favorite programs. However, the advertisement programs which support the TV program the audience want are not served to the appropriate audiences efficiently. This randomly provided advertisement contents can occur to the audiences' indifference and avoidance. In this paper, we propose the target advertisement service for the appropriate distribution of the advertisement contents. The proposed target advertisement service estimates the audience's profile without any issuing the private information and provides the target-advertised contents by using his/her estimated profile. For the experimental results, we used the real audiences' TV usage history such as the ages, fonder and time of the programs from AC Neilson Korea. And we show the accuracy of the proposed target advertisement service algorithm. NDS (Normalized Distance Sum) and the Vector correlation method, and implementation of our target advertisement service system.
The fatty acid compositions of phospholipids extracted from leaves and leaf mitochondria, which were sampled from several horicultural plants grown under blue color-deficient sunlight (BCDS), were determined and compared with those from plants grown under natural white colored sunlight(WCS). It was found that the mitochondria isolated from plants grown under BCDS contained phospholipid whose degree of unsaturation in unit of number of double bonds per lipid molecule was remarkably higher than that from plants grown under WCS, the relative increment being $8{\sim}49%$. This was significantly larger than the relative increment, $4{\sim}8%$ for total phospholipid extracted from whole leaves grown under BCDS campared to WCS. This observation demonstrated that the blue light effect of sunlight on the chemical property of cellular membranes, as long as it was concerned with fatty acid composition, arose mainly at the mitochondrial membrane. Also observing that the degree of unsaturation of mitochondrial phospholipid was much lower than that of total phospholipid, it was interpreted that this was the consequence of rather active oxidative destruction of lipid-fatty acid components occuring in mitochondrial membrane by the reactive oxygen species, especially superoxide($O_2-$), which was known to be produced in mitochondrial inner membrane through the side reactions of the respiratory electron transport chain and also probably through the photosensitized reaction involving oxygen induced by blue colored light. Thus, it may be tentatively concluded that the extent of photosensitization in mitochondrial membrane could be considerably reduced under BCDS resulting in lowering of the $O_2-$ level in the respirating organelle The possible involvement of photodynamic action in membrane oxidation was also indicated by the fact that the typical fat-soluble antioxidant, ${\alpha}-tocopherol$, was found to be contained on a higher level in leaves under BCDS than those under WCS.
Jo, Deokjo;Yoo, Seong-Yeol;Park, Joo-Hyeon;Gao, Yaping;Kim, Seul-Gi;Lee, Jea-Young;Kwon, Eun-Jin;Kwon, Joong-Ho
Food Science and Preservation
/
v.21
no.3
/
pp.365-372
/
2014
Imported Valencia oranges were evaluated to determine the relationship between the fruit size and its quality. The orange size was classified into three groups on a commercial basis: small ($140{\sim}160g/113{\pm}5$ fruit/box), medium ($190{\sim}220g/88{\pm}5$ fruit/box), and large ($250{\sim}280g/72{\pm}5$ fruit/box). The physicochemical and sensory properties were analyzed to evaluate the orange quality. No significant difference in the peel thickness and flesh ratio was detected across the fruit sizes. The juice yield of the medium-sized orange and the TSS/TA ratios of the medium-sized and large oranges showed the highest value, respectively (p<0.05). The large orange had the highest vitamin C content, which was positively correlated with both its DPPH and ABTS radical scavenging abilities (p<0.05). In the sensory evaluation of the fruits and their juice, the scores for sourness and overall preference were significantly higher in the medium-sized and large oranges than in the small ones. The total soluble solids, total acidity, TSS/TA ratio, and reducing sugar content were significantly related to the sensory properties. Finally, the quality and sensory properties were considered superior in the medium-sized and lager Valencia oranges. Further studies on the effects of the variety and origin of Valencia oranges on their quality and sensory properties are required.
Park, Jae-Seuk;Jee, Young-Koo;Choi, Eun-Kyong;Kim, Keun-Youl;Lee, Kye-Young
Tuberculosis and Respiratory Diseases
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v.51
no.4
/
pp.315-324
/
2001
Background : IL-8 is a potent chemotactic cytokine that plays an important role in the host defense mechanism against M. tuberculosis by recruiting inflammatory cells to the site of the infection. Lung epithelial cells, as well as alveolar macrophages are known to produce IL-8 in response to M. tuberculosis. IL-8 gene expression is mainly regulated on the level of transcription by NF-${\kappa}B$. This study investigated whether or not A549 cells produce IL-8 in NF-${\kappa}B$ dependent mechanism in response to macrophages phagocytosing M. tuberculosis. Methods : Peripheral blood monocytes that were obtained from healthy donors were cultured for 24 h with M. tuberculosis and a conditioned medium(CoMTB) was obtained. As a negative control, the conditioned medium without M. tuberculosis (CoMCont) was used. A549 cells were stimulated with M. tuberculosis, CoMCont and CoMTB and the IL-8 concentration in the culture media was measured by ELISA. The CoMTB induced IL-8 mRNA expression in the A549 cells was evaluated using RT-PCR, and CoMTB induced $I{\kappa}B{\alpha}$ degradation was measured using western blot analysis. CoMTB induced nuclear translocation and DNA binding of NF-${\kappa}B$ was also examined using an electrophoretic mobility shift assay(EMSA), and the CoMTB induced NF-${\kappa}B$ dependent IL-8 transcriptional activity was measured using a luciferase reporter gene assay. Results : CoMTB induced IL-8 production by A549 cells($46.8{\pm}4.8\;ng/ml$) was higher than with direct stimulation with M. tuberculosis ($6.8{\pm}2.9\;ng/ml$). CoMTB induced IL-8 mRNA expression increased after 2 h of stimulation and was sustained for 24 h. $I{\kappa}B{\alpha}$ was degraded after 10 min of CoMTB stimulation and reappeared by 60 min. CoMTB stimulated the nuclear translocation and DNA binding of NF-${\kappa}B$. The CoMTB induced NF-${\kappa}B$ dependent IL-8 transcriptional activity($13.6{\pm}4.3$ times control) was higher than either CoMCont($2.0{\pm}0.6$ times control) or M. tuberculosis ($1.4{\pm}0.6$ times control). Conclusion : A conditioned medium of peripheral blood monocytes phagocytosing M. tuberculosis stimulates NF-${\kappa}B$ dependent IL-8 production by the lung epithelial cells.
Kim, Youn Seup;Park, Jae Seuk;Jee, Young Koo;Lee, Kye Young
Tuberculosis and Respiratory Diseases
/
v.56
no.2
/
pp.178-186
/
2004
Background : Photodynamic therapy (PDT) is a new therapeutic method aimed at the selective destruction of cancer cells. The outcome is death of cancer cells through apoptosis or necrosis. The aim of this study was to investigate the characterization of PDT induced cell death in A549 lung cancer cells. Materials and methods : A549 cells were used as the lung cancer cell. 5 aminolevulinic acid (ALA) was used as the photosensitizer and a 632nm diode laser (Biolitec, Germany) as the light source. Cells were incubated with various concentrations of ALA. The 632nm diode laser was then administered for various laser irradiation times. The treated cells were incubated with 24, 48 and 72 hours. The cell viabilities were measured using the crystal violet assay and light microscopy. To observe the cell death mechanism after PDT, cells were observed under fluorescence microscopy after double staining with Hoechst 33342 and propium iodide after PDT. Results : In the crystal violet assay at 24 hours after PDT with a $3.2J/cm^2$ laser irradiation power, the cell viabilities were $89.56{\pm}4.11$, $87.67{\pm}5.48$, and $69.37{\pm}8.84$ with ALA concentrations of 10, 100, and $1mg/m{\ell}$, respectively. In crystal violet assay at 24 hours after PDT with $1mg/m{\ell}$ of ALA, the cell viabilities were $74{\pm}19.85$, $55{\pm}6.1$, and $49.06{\pm}16.64%$ with 1.6, 3.2 and $6.4J/cm^2$ laser irradiation powers, respectively. However, increasing the interval time after PDT did not change the cell viabilities. In the apoptosis assay, photodynamic therapy was inducing the apoptotic cell death. Conclusions : This study shows the apoptotic anticancer effect of photodynamic therapy in A549 lung cancer cells. However, further evaluations with other cancer cells and photosensitizers are necessary.
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