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        검색결과 22

        1.
        2020.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The carbon anode material for lithium-ion battery was prepared by pyrolysis fuel oil and waste polyethylene terephthalate (PET) additive. The pitch was synthesized as a medium material for carbon anode by heat treatment. The waste PET additive improved the softening point and thermal stability of the pitch. La and Lc of the anode material (heat-treated pitch) increased at higher treatment temperature but decreased by waste PET additive. The electric capacity was evaluated based on effects of defective cavity and developed graphite interlayer, respectively. When the La and Lc of the anode material decreased, the electric capacity by cavity increased based on defective graphite structure. Therefore, the addition of waste PET causes the improved capacity by the cavity. The anode material which has a high efficiency (over 95%) and C-rate (95%, 2 C/0.1 C) was obtained by controlling the process of heat treatment and PET addition. The mechanism of lithium-ion insertion was discussed based on effects of defective cavity and developed graphite interlayer.
        4,000원
        2.
        2018.11 구독 인증기관·개인회원 무료
        This study was conducted to investigate effect of feeding beet pulp on reproductive performance, colostrum composition and microbiological characteristics in sows. A total of 12 sows(Landrace×Yorkshire) were randomly allotted three dietary treatments at gestating 90 days. The diets were prepared by adding 0, 5 and 10% of the beet pulp in basal diets. The pigs fed 5% beet pulp showed higher litter size than the 0 and 10% beet pulp treatments, although there was not significant among the treatments. Similarly, birth and 21days weight in piglet were not different among the treatments. In colostrum fat, protein, lactose, citric acid, solid, ffa, true protein were ranged to reference values, but not difference among the treatments. E.coli of feces was lower(P<0.01) in the 5% beet pulp than the 0 and 10% beet pulp treatments. But no effect was observed on Lactobacilli of feces among dietary treatments. These our results indicate the beet pulp has no significant effect of reproductive performance and colostrum composition in sows. But, 5% level beet pulp is effective for reduction of intestinal pathogenic microorganisms.
        3.
        2018.10 구독 인증기관·개인회원 무료
        소나무재선충병의 나무주사는 살선충제를 중심으로 실시되어 왔으며, 매개충인 솔수염하늘소와 북방수염하늘소의 방제는 주로 항공방제나 지상방제를 통하여 이루어졌다. 본 연구에서는 나무주사를 통하여 매개충 (솔수염하늘소)을 방제하기 위한 연구로 Abamectin+Acetamiprid ME, Thiamethoxam DC 약제의 나무주사시 솔수염하늘소의 약효발현농도, 처리 후 기간별 효과(2017년~2018년)를 검토하였다. 실내 발현농도 시험에서는 Acetamiprid, Thiamethoxam LC50 value는 각각 0.102ppm, 0.083ppm 으로 나타 났으며, 야산(포장)에서 Abamectin+Acetamiprid ME, Thiamethoxam DC 처리구의 100.0% 치사 소요일 수는 처리 90일 후 11.0일, 9.4일, 처리 360일 후 11.6일, 10.0일로 나타나서 두 약제 모두 3월 처리시 다음해에 발생하는 매개충 (솔수염하늘소) 방제까지 가능함을 확인 할 수 있었다.
        4.
        2014.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Brucellosis is an important bacterial zoonotic infection worldwide responsible for economic losses in livestock industries which represents a considerable and increasing public health burden. The disease is caused by Brucella which possess the ability to invade and replicate within phagocytes and may result to chronic infection, leading to difficulty in medical therapy of the disease. The treatment for brucellosis employs conventional principles that have been applied for a long time and a combination of antibiotics is currently used due to low efficacy of monotherapies. However, vital effects with respect to health and safety are neglected. Nevertheless, the preventive methods and treatments for brucellosis using traditional medicine have not yet been thoroughly studied, hence, alternative therapies such as the use of natural plant extracts as traditional medicine that are safe, efficient and economical should be explored in order to identify candidates that eliminate complications due to brucellosis. Coptis chinensis Franch (Huanglian) is a traditional Chinese medicinal herb and its extract has been known to possess strong antibacterial activity. In this study, the antibacterial effects of C. chinensis Franch extracts, and the major components of the herb namely berberine and palmatine, were investigated on B. abortus. The C. chinensis Franch ethanol extracts (CCFE) showed bactericidal effects at 1,000 μg/ml concentration and berberine at 100 μg/ml concentration. However, C. chinensis Franch and its components did not affect invasion and intracellular growth of B. abortus in RAW 264.7 cells. In conclusion, C. chinensis Franch ethanol extracts, water extract and its major components such as berberine and palmatine would be a beneficial antimicrobial agent without affecting phagocytic pathway within macrophages, and further study for the precise mechanisms of antibacterial effect would be necessary.
        4,000원
        5.
        2013.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Brucella spp. are facultative intracellular pathogens that have the ability to survive and multiply in professional and nonprofessional phagocytes and cause abortion in domestic animals and undulant fever in humans. Brucella species can survive in a variety of cells, including macrophages and their virulence and chronic infections are thought to be due to their ability to avoid the killing mechanisms within macrophages. Inhibition of phagosome-lysosome fusion has been proposed as a mechanism for intracellular survival of Brucella in professional and nonprofessional phagocytes. Toll-like receptors (TLRs) are part of a skillful system for detection of invasion by microbial pathogens. Recognition of microbial components by TLRs triggers signaling pathways that promote expression of genes and regulate innate immune responses. Recent studies for the interaction between TLRs-Brucella have indicated the importance of control of Brucella infection. Here, we review selected aspects of TLRs-Brucella interaction, which may be helpful to understanding the mechanism of Brucella pathogenesis.
        4,000원
        6.
        2013.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study aims to address the effect of interferential current therapy and thereby to provide basic resources to physical therapies for internal medicine by identifying symptoms for functional dyspepsia and serum gastrin level that shows gastric motility. Following results were obtained by performing interferential current therapy to 16 subjects composed of 8 for functional dyspepsia group and 8 for control group for 20 minutes a day, 3 days a week, for 6 weeks. In control group, serum gastrin level was significantly( p<.01), lowered after the therapy whereas there was no significant difference observed in all questions from questionnaire for symptoms of functional dyspepsia between before and after the therapy. In functional dyspepsia group, serum gastrin level was significantly(p<.01), lowered after the therapy and there was also significant(p<.01) reduction in every question from questionnaire for symptoms of functional dyspepsia between before and after the therapy. There was more significant decrease in serum gastrin level and reduction in questionnaire for symptoms of functional dyspepsia in the functional dyspepsia group compared to the control group(p<.01). This study confirms the interferential current therapy as an effective therapeutic method for internal diseases including functional dyspepsia since it not only improves the symptoms of functional dyspepsia but also allows the gastric motility close to normal.
        4,000원
        7.
        2012.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        1. 본 연구에서는 GM 유채(Brassica napus)의 환경방출실험시의 안전관리를 위한 모니터링을 수행하였다. 2. 문헌조사를 통해 유채의 품종 순도 유지를 위한 격리거리와 교잡가능한 종을 확인함으로써 모니터링의 범위와 모니터링 대상 식물종을 결정하였다. 3. GM 유채의 격리포장으로부터 1.3 km 거리 범위 내에서 발견된 B. napus, B. juncea 및 B. oleracea를 대상으로 모니터링을 실시한 결과, 교잡을 통한 유전자의 유출은 발견되지 않았다.
        4,000원
        8.
        2012.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study purposed to examine the effect of low power laser on pain response and axonal regeneration. In order to prepare peripheral nerve injury models, we crushed the sciatic nerve of Sprague-Dawley rats and treated them with low power laser for 21 days. The rats were divided into 4 groups: normal group(n=10); control group(n=10) without any treatment after the induction of sciatic nerve crush injury; experimental group I(n=10) treated with low power laser(0.21mJ/㎟) after the induction of sciatic nerve crush injury; and experimental group II(n=10) treated with low power laser(5.25mJ/㎟) after the induction of sciatic nerve crush injury. We measured spontaneous pain behavior(paw withdrawal latency test) and mechanical allodynia(von Frey filament test) for evaluating pain behavioral response, and measured the sciatic function index for evaluating the functional recovery of peripheral nerve before the induction of sciatic nerve crush injury and on day 1, 7, 14 and 21 after the induction. After the experiment was completed, changes in the H & E stain and toluidine blue stain were examined histopathologically, and changes in MAG(myelin associated glycoprotein) and c-fos were examined immunohistologically. According to the results of this study, when low power laser was applied to rat models with sciatic nerve crush injury for 21 days and the results were examined through pain behavior evaluation and neurobehavioral, histopathological and immunohistological analyses, low power laser was found to affect pain response and axonal regeneration in both experimental group I and experimental group II. Moreover, the effect on pain response and axonal regeneration was more positive in experimental group I to which output 0.21mJ/㎟ was applied than in experimental group II to which 5.25mJ/㎟ was applied.
        4,200원
        9.
        2010.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study was to analyze and compare the effect of resistance exercise and balance exercise on proprioception and WOMAC index of patients with degenerative knee osteoarthritis. A total of 40 subjects participated in this study. The subjects were diagnosed with degenerative knee osteoarthritis and all were more than 60 years old. They were divided into three groups. Group Ⅰ(n=8) was trained with resistance exercise, Group Ⅱ(n=6) was trained with balance exercise and GroupⅢ(n=6) was trained with range of motion as a control. The results of this study were as follows. It was significantly indicated that the resistance exercise group and balance exercise group elicited error-reduction on proprioception goal-angle (p<.05). There was a statistically significant difference on proprioception between resistance exercise group and control(range of motion) group. There was a statistically significant reduction on WOMAC index between resistance exercise group and balance exercise group (p<.05) and on the WOMAC index between resistance exercise group and range of motion group(p<.05). In conclusion, resistance exercise and balance exercise are effective on degenerative knee osteoarthritis and resistance exercise is the most effective for improving proprioception and WOMAC index. More research on the intervention according to the degree of degenerative knee osteoarthritis is needed.
        4,000원
        10.
        2007.04 KCI 등재 구독 인증기관·개인회원 무료
        Sulfur is commonly used in Asia as an herbal medicine to treat inflammation and cancer , a nd potent chemo preventi ve effects have been demons tra ted in various in vivo and in vitromodels for s ul fur-containing compounds found in natura l1y occurring product s. Here, we 1'eport the growth inhibitory and apoptosis-related effects of a n ewly developedhigh-puri ty edible sulfur(ES) on immo1'tali zed human o1'al ke1'atinocytes(IHOKs) and on oral cancer cells representing two stages of oral cancer (HN4‘ HN12) based on an 3-(4,5-Dimethylthiazol-2-yl) -2.5- diphe n yltetrazolium bromide(MTI) assay, Western blotting, cell cycle analysis, and nuclear staining. The puri ty of the ES used in thi s study was ve1'ified by high performance liquid chromatog1'aphy (HPLC) , ami no acid analysis and energy dispersive spectroscopy(EDS). ES inhibited the prolife1'ation of imrnortalized and ma lig nant o1'al kerati nocytes in a dose- and time-dependent manne1' FITC-Annex.in V staining, DNA fragmentation t esting. and Hoechst 33258 s taining revealed that ES inhibits cell growth via apoptosis. ES bl ocked cell-cycle prog1'ession at t he sub-Gl phase‘ wi th decreased expression of cyclins Dl, D2‘ and E, and their activating partn ers cdk2‘ cdk4‘ and cdkfì, and a concomitant induction of p53 and p21/WAF1. Furthe1'more, ES treatment in creased the cytosolic level of cytochrome c and resulted in caspase- 3 activation‘ and thi s effect was co1'1'elated with Bax up-regulation and Bcl-2 down-1'egulation Taken together‘ these data suggest that ES is a potential chemopreventive and chemotherapeut ic agent fo r oral ca ncer
        12.
        1998.12 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        7,700원
        13.
        1996.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        배관을 구속시키기 위한 원동형 배관 지지대 (Trunnion Pipe Support) 까 부착된 uß 간의 응-딱해석플 위하 여 유한요소해석을 사용하였다. 해석션파로 부터 얻어진 응역은 두께에 대한 평칸(막응역) 넷 선행 응→박( ""," 힘응력) 으로 분류 되었므며, 분류된 응벽값은 암략에 악한 언차응략겨l 수 (B 1 ) 와 이자응역겨l 수 (C 1 ) , 보멘트에 의한 일차응력계수 (B" , Bιr) 와 이차응략셰수 (C객, C!T) 플- 추성하시 위하여 ASME Code 에 성의뭔것파 일치 하게 해석되었다 무차원의 함수로써 응력 세수에 대한 경험식 얀 새만히기 위하여 여서 ~i~ l;'l 의 해삭 2~ 수행하 였다.
        4,000원
        14.
        2015.08 KCI 등재 서비스 종료(열람 제한)
        Lepisorus thunbergianus (Kaulf.) Ching has been used in folk medicine in Korea. In this study, a L. thunbergianus methanol extract and its fractions were investigated for their antioxidant properties. The results showed that the ethyl acetate and butanol fractions of L. thunbergianus possess potent DPPH radical scavenging activities. Both fractions also possessed reducing power and inhibited reactive oxygen species formation. In addition, the cytotoxic activity of the L. thunbergianus n-hexane fraction (HF) was investigated. The results suggested that the HF remarkably suppressed proliferation of human breast, liver and colon cancer cells. These results demonstrate, for the first time, that L. thunbergianus extract induces apoptosis in SW620 cells, suggesting that L. thunbergianus may have potential as a therapeutic agent for colon cancer.
        17.
        2007.03 KCI 등재 서비스 종료(열람 제한)
        A new single cross waxy corn (Zea mays L.) hybrid, “Miheugchal” with black kernel was developed by the Maize Experiment Station (MES), Gangwon-do Agricultural Research and Extension Services (GARES) in 2004. This hybrid, which has good eating quality and
        18.
        2003.12 KCI 등재 서비스 종료(열람 제한)
        In order to measure an antifreezing tolerance, antifreeze proteins accumulated upon cold acclimation in apoplast were analyzed. As Dongborilho were cold-acclimated for 3 to 74 days there was an abrupt increase in apoplastic proteins up to 30 days and then decrease to the similar levels. Among the known antifreeze proteins, CLP produced in E. coli. and TLP purified from apoplast were used to generate antisera that allow to measure and localize the proteins in leaves of barley. The CLP of 27.7 kDa and TLPs of 6, 26, 27, 30, and 31 kDa were increased in their amounts in apoplast as cold treatment being longer. There was a correlation among the amounts of those proteins accumulated in apoplast and freezing tolerance as shown in field and ion leakage tests for five cultivars. The deposit of CLP was localized in the marginal area and the area adjacent to leaf vescular bundle cells in an increasing manner according to duration of cold acclimation but no variation was observed in terms of it's distribution. Based on the close correlation between levels of antifreeze proteins and degrees of freezing tolerance, the immunological methods was to develop to estimate a freezing tolerance in barley
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