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      • SCISCIESCOPUS

        Microneedle patch delivery to the skin of virus-like particles containing heterologous M2e extracellular domains of influenza virus induces broad heterosubtypic cross-protection

        Kim, M.C.,Lee, J.W.,Choi, H.J.,Lee, Y.N.,Hwang, H.S.,Lee, J.,Kim, C.,Lee, J.S.,Montemagno, C.,Prausnitz, M.R.,Kang, S.M. Elsevier Science Publishers 2015 Journal of controlled release Vol.210 No.-

        A broadly cross-protective influenza vaccine that can be administrated by a painless self-immunization method would be a value as a potential universal mass vaccination strategy. This study developed a minimally-invasive microneedle (MN) patch for skin vaccination with virus-like particles containing influenza virus heterologous M2 extracellular (M2e) domains (M2e5x VLPs) as a universal vaccine candidate without adjuvants. The stability of M2e5x VLP-coated microneedles was maintained for 8weeks at room temperature without losing M2e antigenicity and immunogenicity. MN skin immunization induced strong humoral and mucosal M2e antibody responses and conferred cross-protection against heterosubtypic H1N1, H3N2, and H5N1 influenza virus challenges. In addition, M2e5x VLP MN skin vaccination induced T-helper type 1 responses such as IgG2a isotype antibodies and IFN-γ producing cells at higher levels than those by conventional intramuscular injection. These potential immunological and logistic advantages for skin delivery of M2e5x VLP MN vaccines could offer a promising approach to develop an easy-to-administer universal influenza vaccine.

      • SCIESCOPUSKCI등재

        Machine-to-Machine (M2M) Communications in Vehicular Networks

        Booysen, M.J.,Gilmore, J.S.,Zeadally, S.,Rooyen, G.J. Van Korean Society for Internet Information 2012 KSII Transactions on Internet and Information Syst Vol.6 No.2

        To address the need for autonomous control of remote and distributed mobile systems, Machine-to-Machine (M2M) communications are rapidly gaining attention from both academia and industry. M2M communications have recently been deployed in smart grid, home networking, health care, and vehicular networking environments. This paper focuses on M2M communications in the vehicular networking context and investigates areas where M2M principles can improve vehicular networking. Since connected vehicles are essentially a network of machines that are communicating, preferably autonomously, vehicular networks can benefit a lot from M2M communications support. The M2M paradigm enhances vehicular networking by supporting large-scale deployment of devices, cross-platform networking, autonomous monitoring and control, visualization of the system and measurements, and security. We also present some of the challenges that still need to be addressed to fully enable M2M support in the vehicular networking environment. Of these, component standardization and data security management are considered to be the most significant challenges.

      • KCI등재후보

        Machine-to-Machine (M2M) Communications in Vehicular Networks

        ( M. J. Booysen ),( J. S. Gilmore ),( S. Zeadally ),( G. J. Van Rooyen ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.2

        To address the need for autonomous control of remote and distributed mobile systems, Machine-to-Machine (M2M) communications are rapidly gaining attention from both academia and industry. M2M communications have recently been deployed in smart grid, home networking, health care, and vehicular networking environments. This paper focuses on M2M communications in the vehicular networking context and investigates areas where M2M principles can improve vehicular networking. Since connected vehicles are essentially a network of machines that are communicating, preferably autonomously, vehicular networks can benefit a lot from M2M communications support. The M2M paradigm enhances vehicular networking by supporting large-scale deployment of devices, cross-platform networking, autonomous monitoring and control, visualization of the system and measurements, and security. We also present some of the challenges that still need to be addressed to fully enable M2M support in the vehicular networking environment. Of these, component standardization and data security management are considered to be the most significant challenges.

      • Multiple heterologous M2 extracellular domains presented on virus-like particles confer broader and stronger M2 immunity than live influenza A virus infection

        Kim, M.C.,Lee, J.S.,Kwon, Y.M.,O, E.,Lee, Y.J.,Choi, J.G.,Wang, B.Z.,Compans, R.W.,Kang, S.M. Elsevier/North-Holland 2013 Antiviral research Vol.99 No.3

        The influenza M2 ectodomain (M2e) is poorly immunogenic and has some amino acid changes among isolates from different host species. We expressed a tandem repeat construct of heterologous M2e sequences (M2e5x) derived from human, swine, and avian origin influenza A viruses on virus-like particles (M2e5x VLPs) in a membrane-anchored form. Immunization of mice with M2e5x VLPs induced protective antibodies cross-reactive to antigenically different influenza A viruses and conferred cross protection. Anti-M2e antibodies induced by heterologous M2e5x VLPs showed a wider range of cross reactivity to influenza A viruses at higher levels than those by live virus infection, homologous M2e VLPs, or M2e monoclonal antibody 14C2. Fc receptors were found to be important for mediating protection by immune sera from M2e5x VLP vaccination. The present study provides evidence that heterologous recombinant M2e5x VLPs can be more effective in inducing protective M2e immunity than natural virus infection and further supports an approach for developing an effective universal influenza vaccine.

      • SCISCIESCOPUS

        Hydrogen production by auto-thermal reforming of ethanol over nickel catalyst supported on metal oxide-stabilized zirconia

        Youn, M.H.,Seo, J.G.,Song, I.K. Pergamon Press ; Elsevier Science Ltd 2010 International journal of hydrogen energy Vol.35 No.8

        Metal oxide-stabilized mesoporous zirconia supports (M-ZrO<SUB>2</SUB> with different metal oxide stabilizer (M = Zr, Y, La, Ca, and Mg) were prepared by a templating sol-gel method. 20 wt% Ni catalysts supported on M-ZrO<SUB>2</SUB>(M = Zr, Y, La, Ca, and Mg) were then prepared by an incipient wetness impregnation method for use in hydrogen production by auto-thermal reforming of ethanol. The effect of metal oxide stabilizer (M = Zr, Y, La, Ca, and Mg) on the catalytic performance of supported nickel catalysts was investigated. Ni/M-ZrO<SUB>2</SUB>(M = Y, La, Ca, and Mg) catalysts exhibited a higher catalytic performance than Ni/Zr-ZrO<SUB>2</SUB> because surface oxygen vacancy of M-ZrO<SUB>2</SUB>(M = Y, La, Ca, and Mg) and reducibility of Ni/M-ZrO<SUB>2</SUB>(M = Y, La, Ca, and Mg) were enhanced by the addition of lower valent metal cation. Hydrogen yield over Ni/M-ZrO<SUB>2</SUB>(M = Zr, Y, La, Ca, and Mg) catalyst was monotonically increased with increasing both surface oxygen vacancy of M-ZrO<SUB>2</SUB>support and reducibility of Ni/M-ZrO<SUB>2</SUB>catalyst. Among the catalysts tested, Ni catalyst supported on yttria-stabilized mesoporous zirconia (Ni/Y-ZrO<SUB>2</SUB> showed the best catalytic performance.

      • KCI등재후보

        미세각막절개도 헤드의 선택을 통한 맞춤식각막절개방식의 라식

        강민호,송유미,강성민,박영숙,최철영,이윤정,이병로.Min Ho Kang. M.D.. Yoo Mi Song. M.D.. Sung Min Kang. M.D.. Young Sook Park. M.D.. Chul Young Choi. M.D.. Yoon Jung Lee. M.D.. Byung Ro Lee. M.D. 대한안과학회 2006 대한안과학회지 Vol.47 No.2

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        Purpose: To compare the intraoperative and postoperative complication rates and visual outcomes with M2 130 head (thick flap group) and M2 110 head (thin flap group). Methods: One-hundred-ninety-five eyes of 104 patients who underwent LASIK with the Moria M2 microkeratome and Allegretto-wave laser were reviewed retrospectively. Selection of M2 heads was based on preoperative pachymetry and estimated ablation depth. Intraoperative and postoperative flap-related complications, mean postoperative uncorrected visual acuity (UCVA), and mean spherical equivalent (MSE) were evaluated and compared. Results: Mean follow-up was 8.1 months. The number of eyes, preoperative MSE and mean corneal thickness of M2 130 were 115, -4.04±1.63diopter (D) and 549.40±39.16??m, and 85, -6.61±3.43D and 525.16±24.53 ?m, respectively, in the 110 head group. Mean UCVA and MSE at postoperative 1 week, 3 months and 6 months were 1.00±0.18, -0.26±0.49D; 1.07±0.68, -0.40±0.51D; and 1.01±0.22, -0.51±0.50D, respectively, in the 130 head group, and 0.90±0.23, -0.46±1.02D; 0.91±0.23, -0.67±0.79D; 0.85±0.46, -0.75±0.88D, respectively, in the 110 head group. There were no significant differences in intraoperative and postoperative flap-related complication rates between the two groups (p=0.316). There were no statistically significant differences in postoperative mean UCVA or MSE between the two groups (p>0.05), except for MSE at the third and sixth postoperative months (p=0.005, 0.013). Conclusions: Proper selection of M2 heads by preoperative pachymetry allowed for an adequate residual stroma bed with good visual outcome. Utilizing one single microkeratome and switching between two heads was advantageous and cost-effective.

      • SCISCIESCOPUS

        Supplemented vaccination with tandem repeat M2e virus-like particles enhances protection against homologous and heterologous HPAI H5 viruses in chickens

        Song, B.M.,Kang, H.M.,Lee, E.K.,Jung, S.C.,Kim, M.C.,Lee, Y.N.,Kang, S.M.,Lee, Y.J. Butterworths ; Elsevier Science Ltd 2016 Vaccine Vol.34 No.5

        Highly pathogenic avian influenza (HPAI) H5 viruses derived from A/Goose/Guangdong/1/96 have been continuously circulating globally, severely affecting the public health and poultry industries. The matrix 2 protein ectodomain (M2e) is considered a promising candidate for a universal cross-protective influenza vaccine that provides more effective control over HPAI H5 viruses harboring variant hemagglutinin (HA)-antigens. Here, we evaluated the protective efficacy of a tandem repeat construct of heterologous M2e presented on virus-like particles (M2e5x VLPs) either alone or as a supplement against HPAI H5 viruses in a chicken model. Chickens immunized with M2e5x VLPs alone induced M2e-specific antibodies but were not protected against HPAI H5. The homo- and cross-protective efficacy of M2e5x VLP-supplemented vaccination of chickens was also examined. Importantly, supplementation with M2e5x VLPs induced significantly higher levels of antibodies specific for M2e and different viruses as well as provided improved protection against homologous and heterologous HPAI H5 viruses. Considering the limited efficacy of inactivated vaccines, supplement vaccination with M2e5x VLPs may be an effective measure for preventing outbreaks of HPAI viruses that have the ability to constantly change their antigenic properties in poultry.

      • 2단계 급속동결 및 초자화 동결한 토끼상실배의 체외생존성에 관한 연구

        정구민,이창규,임경순,김수헌 서울대학교농과대학농업개발연구소 1990 서울대농학연구지 Vol.15 No.1

        본 시험은 수정란 급속동결보존기술의 개발을 위한 기초자료를 얻기 위하여 2단계 급속동결 및 초자화동결이 토끼 상실배의 체외발생등에 미치는 영향을 검토하고자 실시하였으며, 얻어진 결과는 다음과 같다. 1. 토끼 상실배를 1.5, 2.0, 2.5 및 3.0 M glycerol과 0.5 M sucrose가 포함된 동결액에 실온에서 10분간 노출후 -30℃에서 30∼40분간 정치하여 급속동결하였을 때 발생율은 각각 36.4, 83.3, 92.3 및 84.2%로 2.5 M glycerol에서 가장 높았다. 2. 토끼 상실배를 1.5, 2.0, 2.5 및 3.0 M 1,2-propanediol과 0.5 M sucrose가 포함된 동결액에 실온에서 10분간 노출 후 -30℃에서 30∼40분간 정치하여 급속동결하였을 때 발생율은 각각 26.6, 55.6, 65.0 및 52.9%로 2.5 M 1,2-propanediol에서 가장 높았으나, glycerol을 사용했을 때 보다 낮았다. 3. 토끼 상실배를 2.5, 3.0 및 3.5 M glycerol과 0.5 M trehalose가 포함된 동결액에 실온에서 10분간 노출후 액체질소에 침지하여 초급속동결한 결과 회수율은 각각 87.5, 92.5 및 92.5%, 형태적으로 정상인 수정란의 비율은 각각 37.5, 55.5 및 60.0%, 그리고 발생율은 각각 13.3, 36.4 및 37.5%로 3.5 M glycerol에서 가장 높았으나 초자화동결법보다 현저하게 낮았다. 4. 토끼 상실배를 25% glycerol과 25% 1,2-propanediol을 함유한 동결액에 실온에서 10분간 노출후 초자화동결했을 때 발생율은 75.0%로 실온에서 형평한 후 초자화동결이 가능하였다. This experiment was carried out to investigate on in vitro development of rabbit monla frozen by 2-step feezing and vitrification. The results obtained from this experiment are as follows; 1. When rabbit morula in m-PBS containing 1.5, 2.0, 2.5 or 3.0 M glyceral and 0.5 M sucrose for 10 min at room temperature were cooled at -30℃ for 30 to 40 min and plunged into liquid nitrogen, the proportion of embryo developed to expanded blastoyst was 36.4, 83.3, 92.3 and 84.2%, respectively. Glycerol 2.5 M showed higher survival than others. 2. When rabbit morula in m-PBS containing 1.5, 2.0, 2.5 or 3.0 M 1, 2-propanediol and 0.5 M sucrose for 10 min at room temperature were cooled at -30℃ for 30 to 40 min and plunged into liquid nitrogen, the proportion of embrye developed to expanded blastocyst was 26.6, 55.6, 65.0 and 52.9%, respectively. 1, 2-propanediol was less effective than glycerol. 3. When rabbit morula in m-PBS containing 2.5, 3.0 or 3.5 M glycerol and 0.5 M trehalose for 10 min at room temperature were plunged into liquid nitrogen and thawed rapidly, the recovery rate of embryo was 87.5, 92.5 and 92.5%, the proportion of morphologically normal embryo was 37.5, 55.5 and 60.0%, and the proportion of embryo developed to expanded blastocyst was 13.3. 36.4 and 37.5%, respectively. The proportion of embryo developed to expanded blastocyst was higher in vitrification than in plunging into liquid nitrogen. 4. When rabbit morula were frozen by vitrification in m-PBS containing 25% glycerol. 25% 1, 2-propanediol, the proportion of embryo developed to expanded blastocyst was 75.0%, the result suggested that rabbit embryos could be frozen by vitrification after equilibration at room temperature.

      • ANGULAR MOMENTUM OF DWARF GALAXIES

        Butler, Kirsty M.,Obreschkow, Danail,Oh, Se-Heon American Astronomical Society 2017 ASTROPHYSICAL JOURNAL LETTERS - Vol.834 No.1

        <P>We present measurements of baryonic mass M-b and specific angular momentum (sAM) j(b) in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample. These measurements, based on 21 cm kinematic data from the Very Large Array and stellar mass maps from the Spitzer Space Telescope, extend previous AM measurements by more than two orders of magnitude in M-b. The dwarf galaxies show systematically higher j(b) values than expected from the j(b) proportional to M-b(2/3) scaling of spiral galaxies, representative of a scale-free galaxy formation scenario. This offset can be explained by decreasing baryon mass fractions f(M) = M-b/M-dyn (where M-dyn is the dynamical mass) with decreasing M-b (for M-b < 10(11) M-circle dot 11). We find that the sAM of neutral atomic hydrogen (H I) alone is about 2.5 times higher than that of the stars. The M-j relation of H I is significantly steeper than that of the stars, as a direct consequence of the systematic variation of the H I fraction with M-b.</P>

      • Measurement of the top quark mass in the dileptonic tt¯ decay channel using the mass observables Mbℓ , MT2 , and Mbℓν in pp collisions at s=8 TeV

        Sirunyan, A. M.,Tumasyan, A.,Adam, W.,Asilar, E.,Bergauer, T.,Brandstetter, J.,Brondolin, E.,Dragicevic, M.,Erö,, J.,Flechl, M.,Friedl, M.,Frü,hwirth, R.,Ghete, V. M.,Hartl, C.,,rmann, N American Physical Society 2017 Physical Review D Vol.96 No.3

        <P>A measurement of the top quark mass (M-t) in the dileptonic t (t) over bar decay channel is performed using data from proton-proton collisions at a center-of-mass energy of 8 TeV. The data was recorded by the CMS experiment at the LHC and corresponds to an integrated luminosity of 19.7 +/- 0.5 fb(-1). Events are selected with two oppositely charged leptons (l = e, mu) and two jets identified as originating from b quarks. The analysis is based on three kinematic observables whose distributions are sensitive to the value of Mt. An invariant mass observable, M-bl, and a 'stransverse mass' observable, M-T2, are employed in a simultaneous fit to determine the value of M-t and an overall jet energy scale factor (JSF). A complementary approach is used to construct an invariant mass observable, M-blv, that is combined with M-T2 to measure M-t. The shapes of the observables, along with their evolutions in M-t and JSF, are modeled by a nonparametric Gaussian process regression technique. The sensitivity of the observables to the value of M-t is investigated using a Fisher information density method. The top quark mass is measured to be 172.22 +/- 0.18(stat)(-0.93)(+0.89) (syst) GeV.</P>

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