• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.166-170
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• 2007

This paper discusses stationkeeping of COMS which accommodates two optical payloads. In order to provide good quality images to the users, the east/west stationkeeping which is strong perturbing sources shall be performed outside of mandatory observation time slots asked by users. If the east/west stationkeeping time is resulted inside of the mandatory time slots, it shall be shifted in order to be performed outside of mandatory time slot, or a new stationkeeping shall be planned. This constraint is expected to ask additional fuel consumption in comparison with tradition stationkeeping. This paper analyzes the impact of mandatory time slots to the stationkeeping fuel consumption. Orbit simulations have been conducted to determine validity of given constraints in the light of fuel requirement and stationkeeping accuracy.

• Bulletin of the Korean Chemical Society
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• 제8권3호
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• pp.211-214
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• 1987

Asymmetric reduction of a series of aliphatic ketones and representative other classes of ketones with potassium 9-O-isopinocampheyloxy-9-boratabicyclo[3.3.1]non ane (K 9-O-Ipc-9-BBNH) was studied. All the ketones examined were reduced smoothly to the corresponding alcohols in THF at -$78^{\circ}C$. Thus, the reduction of 2-butanone, 3-methyl-2-butanone, 3,3-dimethyl-2-butanone, 2-octanone, and 4-phenyl-2-butanone provides 51% ee, 61% ee, 44% ee, 35% ee, and 33% ee of optical inductions, respectively. The reduction of other classes of ketones gave 52% ee for 2,2-dimethylcyclopentanone, 47% ee for acetophenone, 23% ee for 3-acetylpyridine, 50% ee for methyl benzoylformate, 4.8% ee for 2-chloroacetophenone, 30% ee for trans-4-phenyl-3-butene-2-one, and 2% ee for 4-phenyl-3-butyn-2-one. Thus, the reagent was found to be most useful in the asymmetric reduction of acyclic and cyclic aliphatic series of ketones.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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• pp.94.1-94.1
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• 2003

This research was performed to investigate the protective effect of Chungpesagan-tang (CPS) against ischemic damage in PC12 cells. To elucidate the mechanism of the protective effect of CPS on ischemic insult, cell viability and changes in activities of Superoxide dismutase, Glutathione Peroxidase, Catalase, Caspase 3 and the production of Malondialdehyde were observed after treating PC12 cells with CPS which was metabolized by rat liver homogenate. Pretreatment of CPS with liver homogenate increased its protective effect against ischemic insult by reducing the harmful effect of CPS itself. (omitted)

• 대한의용생체공학회:의공학회지
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• 제25권3호
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• pp.183-188
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• 2004

Magnetic resonance current density imaging (MRCDI) is a useful method for measuring electrical current density distribution inside an object. To avoid object rotations during the conventional MRCDI scans, we have reconstructed current density component images by applying a spatial filter to the magnetic field data measured both inside and outside the object. To measure the magnetic field outside the object with MRI, we immersed the object in a water tank. To evaluate accuracy of the current density imaging, we have made a conductivity phantom with a corresponding finite element method model. We have compared the experimentally obtained current density images with the ones calculated by the finite element method. The average errors of the reconstructed current density images were 6.6 ∼ 45.4 ％ when the injected currents were 1 ∼ 24 mA. We expect that the current density component imaging technique can be used in diverse biomedical applications such as electrical therapy system developments and biological electrical safety analysis.

• 동의생리병리학회지
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• 제16권2호
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• pp.332-337
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• 2002

Phellinus Iinteus from Cambodia was confirmed to have a homologous DNA sequencec to Phellinus Iinteus. Antitumor and immunomodulatory activities were evaluated with aquous extract of Cambodian Phellinus Iinteus(CPL). CPL didn't show any significant cytotoxicity on HT1080, Sarcoma 180 and B16BL6, whereas it inhibited the relaxation of DNA topoisomerase I from the concentration of 250ug/ml. In the pulmonary colonization assay it inhibited pulmonary metastasis by B16BL6 in C57BL6 mice to 36%, 36.9% and 55.5% at various doses of 2 mg, 20 mg and 50 mg. From FACS analysis with splenocytes pretreated with CPL, it significantly increased lymphoblast and induced production of IL-2. These results indicate Cambodian Phellinus Iinteus has antitumor and immunomodulatory activities still suggesting more study on its mechanism and effective compound in detail.

• 대한암한의학회지
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• 제11권1호
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• pp.1-21
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• 2006

This study was undertaken to evaluate safety and antitumor activity of Nexia, a processed extract of Rhus verniciflua STOKES by heating according to Korean patent 0504160 through toxicology, cancer research and clinical application. Nexia did not exhibit any toxicological symptoms through 13 week continuous treatment, dosage accumulation study and anaphylaxis response. The lifespan of four patients with acute lymphocytic leukemia under complete remission were 110, 83, 97, and 86 months after treatment of Nexia, respectively. These data suggest that Nexia, a processed extract by removing allergen from Rhus verniciflua STOKES, may have safety and antitumor activity and also still need continuous study on its mechanism and clinical trial.

• 대한암한의학회지
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• 제11권1호
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• pp.31-39
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• 2006

Rhus Verniciflua Stokes has been used for long history to treat blood stasis and cancer in Oriental Medicine. But urushiol, a constituent of Rhus Verniciflua Stokes has T-cell mediated allergic reaction, so it has made clinical limitation. Nexia is allergen removed extract of Rhus Verniciflua Stokes and its extraction process as well as quality control is needed to be standardized. The optimized extraction condition is as follow; temperature is $90{\sim}95^{\circ}C$, volume of slovent 10 times, extraction time >6 hours, pressure $, slovnet water or EtOH(60%), yield 8.1${\sim}$9.8(w/w). HPLC pattern and isolation study showed Nexia contain fisetin(>13.0%), fustin(>7.0%) and no urushiol.

• 대한암한의학회지
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• 제12권1호
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• pp.67-73
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• 2007

Breast cancer is common in West and Incidence of breast cancer has increased in Korea. According as conventional western medical treatment, breast cancer patient received MRM(modified radical mastectomy) and anti cancer chemotherapy. In this case report, We introduce a case of breast cancer patient who showed lung metastasis(metastatec adenocarcinoma) after MRM(modified radical mastectomy) 4 years before the diagnosis of relapse. After lung metastasis of breast cancer, the patient received 4th chemotherapy and refused to get more conventional western medical treatment including chemotherapy. After 24 month of traditional oriental medical treatment using allegen removed Rhus Verniciflua Stokes(ARV), however, the size of cancer mass decreased and the patient showed improved condition. Further case study will be needed in order to determine the effect of ARV on breast cancer patient.

• 대한암한의학회지
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• 제14권1호
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• pp.37-44
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• 2009

Most of patients who have cancer still suffer from various forms of pain that significantly impact their quality of life. Cancer pain is a difficult problem for clinicians because analgesic drugs do not always procure complete relief. Acupuncture has been used as complementary treatment of cancer pain. We report a patient with colorectal cancer who suffer from cancer pain. The patient underwent chemotherapy, radiotherapy and opioid therapy. However, the patient insisted on being treated for his continuous pain with oriental medical treatment. The patient was treated with acupuncture(especially SAAM acupuncture) for 2 months, additional herbal medication was administered. After those treatments, the patient showed remarkable improvement in terms of intensity and severity of cancer pain. Further study will be needed in order to determine the long-term efficacy of acupuncture on cancer pain.

• 수산해양교육연구
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• 제25권4호
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• pp.991-997
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• 2013

Distribution and occurrence of swimming crab, Portunus trituberculatus larvae were investigated in the mid-western coast of Korea in the Yellow Sea. P. trituberculatus larvae were collected in July and August from 2010 to 2012. Bongo net with 303 mesh was deployed once with a double oblique tow. Zoea I (ZI) densities were highest in all sampling months. Then densities of later larval stages decreased dramatically. In general, larval densities at the stations in northern parts and coastal areas were higher than those at the southern and offshore area. Because egg bearing seasons of P. trituberculatus in the study area are between April and August, larval densities, particularly, of ZI may be underestimated. Considering higher densities of ZI and lower ones of later stages, larvae may be transported to growing area and returned to the parental populations. Larval densities and sea surface temperature were not correlated.