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        검색결과 494

        141.
        2016.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        High pollutant-loading capacities (up to 319 times its own weight) are achieved by three-dimensional (3D) macroporous, slightly reduced graphene oxide (srGO) sorbents, which are prepared through ice-templating and consecutive thermal reduction. The reduction of the srGO is readily controlled by heating time under a mild condition (at 1 10–2 Torr and 200°C). The saturated sorption capacity of the hydrophilic srGO sorbent (thermally reduced for 1 h) could not be improved further even though the samples were reduced for 10 h to achieve the hydrophobic surface. The large meso- and macroporosity of the srGO sorbent, which is achieved by removing the residual water and the hydroxyl groups, is crucial for achieving the enhanced capacity. In particular, a systematic study on absorption parameters indicates that the open porosity of the 3D srGO sorbents significantly contributes to the physical loading of oils and organic solvents on the hydrophilic surface. Therefore, this study provides insight into the absorption behavior of highly macroporous graphene-based macrostructures and hence paves the way to development of promising next-generation sorbents for removal of oils and organic solvent pollutants.
        4,000원
        144.
        2016.04 구독 인증기관·개인회원 무료
        The house fly, Musca domestica L. is a serious cosmopolitan pest in livestock production systems. Poultry farmers employ various techniques to control them but rely heavily on the use of chemicals which has the serious drawback of the target pest becoming resistant. We have selected two native natural enemies in Gyeonggi area where selected for the biological control of the house fly. Carcinops pumilio (Erichson) (Coleoptera: Histeridae), commonly found in poultry manure, is an important predator of house fly eggs and larvae. The substitute food source was developed for the mass rearing of C. pumilio. Spalangia nigroaenea (Hymenoptera: Pteromalidae) not only parasitized the host to produce its progeny but also killed host pupae by feeding. The parasitoid induced mortality had an effect on the parasitoid-to-host density relationships.
        145.
        2016.03 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        Assuming that implicit and explicit knowledge are two different constructs, the current study takes unpaired English unaccusatives as its target grammar feature to investigate these two types of knowledge among Korean EFL learners. In line with the growing body of research utilizing a battery of tests, this study adopts a combination of validated tests to assess implicit and explicit knowledge. In doing so, this study lends support to previous studies, in that the L2 learners’ two types of knowledge are not on par. The findings indicate that proficiency was not correlated with the learners’ explicit knowledge, while it was highly correlated with their implicit knowledge. Moreover, regardless of the grammaticality of the unaccsuative sentences, the role of subject animacy varied depending on the learners’ different type of knowledge in relation to proficiency. Finally, a critical discussion on the importance of separating the two constructs of knowledge and implications for future research are provided.
        6,300원
        146.
        2016.02 구독 인증기관 무료, 개인회원 유료
        This study was carried out to recommend the recycling technology from the organic wastes generated in the neighborhood of a dam in Kroea. The order of production of the organic wastes without the suspended materials and energy corps are Chungju-dam(649.9 ton/day), Daechung-dam(525.1ton/day), Hapcheon-dam(485ton/day), Namgang-dam(478ton/day), and Soyang-dam(246.4ton/day). Because livestock excretions and nightsoil were composed of 72 to 93% of the total organic wastes, they should be proferly reflected in the plan of recycling. It was investigated that the biodegradability was 40~80%, biogas production, 0.22~1.70m3/kg VS, methan production, 0.15~1.07m3/kg VS, and methan contents, 63~79%, respectively, in case of the livestock excretions, which constituted over than 50% of organic wastes. Therefore, the appropriate technology for the recycling of organic wastes can be considered anaerobic co-digestion; this technology can create high added value because of using the fuel for new regeneration enery. SCFMR(Semi-Continuously Fed and Mixed Reactor) for an anaerobic digestion reactor was suited for the treatment of organic wastes because the retention time was relatively constant, compared to CSTR(Continuous Stirred Tank Reactor), power consumption was small, and operation and management of reactor was easy and economical.
        4,000원
        147.
        2016.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study was to study how L2 motivations in both Dörnyei’s (2005, 2009) L2 Motivational Self System and Gardner’s (1985) socio-educational model were related to intrinsic and extrinsic subscales in the self-determination theory (Deci & Ryan, 1985) in Korean college contexts. This study investigated the relationships among the motivational variables by the use of the correlation method and the effects of L2 motivations on motivated behavior through multiple regression analysis. The findings showed Gardner’s (1985) integrativeness and ideal L2 self were strongly correlated with the more self-determined types of motivations, while L2 learning experience and ought-to L2 self were associated with the less self-determined ones in the self-determination theory. In addition, Dörnyei’s (2005, 2009) L2 Motivational Self System and the extrinsic motivation subscales, identified regulation and external regulation, explained Korean college students’ motivated behavior better than Gardner’s (1985) integrativeness. The theoretic discussions are made at the conclusion.
        5,500원
        148.
        2015.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        이 연구는 에치고츠마리 마을을 대상으로 농촌마을에 당대예술을 도입함으로서 활성화 되어지는 과정과 그 결과를 다룬 것이다. 대상지의 고찰과 당대예술의 도입 계기, 마을의 경관요소, 예술제의 계획, 자원의 활용, 예술 도입 후 성과에 대한 데이터를 분석하여 예술이 농촌마을의 발전에 미친 영향과 지속적인 발전 가능성을 규명하였다. 연구를 통해 당대예술을 이용한 농촌경관의 변화가 농촌마을 활성화에 도움이 되는 것으로 나타났으며 자연 및 예술의 조화에도 영 향을 주는 것으로 파악되었다. 논문은 연구의 목적과 배경, 연구의 대상과 방법, 일본 마을의 경관요소 및 에치고츠마리의 분석, 예술제의 계획 및 자원 이용의 상황에 대한 고찰 그리고 연구 결과로 구성되었다. 연구결과 당대예술의 도입이 에치고츠마리 마을에 미친 좋은 영향은 첫째, 경제적인 수익을 높였으며 둘째, 인구 구조가 변화되면서 전통적인 단일 농경구조가 바뀌었고 셋째, 농민들의 생활방식이 변화되어 새로운 문화가치를 형성했으며 예술제가 에치고츠마리의 새로운 문화의 상징이 되었다. 넷째, 마을의 거주환경, 교통, 공공시설 등 생활환경 등이 개선되었으며 다섯째, 마을의 경관요소 및 공간속성에 변화를 가져왔다. 또한 예술 도입을 통해 에치고츠마리 마을이 다시 활성화 된 사례는 최근 사회적으로 문제되는 농촌마을의 발전에 도움을 줄 수 있을 것이다.
        4,000원
        149.
        2015.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        농진청에서 수행하고 있는 아프리카 국제협력프로그램인KAFACI 사업의 일환으로 우간다 등 8개국에 ‘통일형 다수성벼 품종개발’ 사업을 추진하고 있다. 이를 위해 아프리카에서정상적인 생육과 수량을 나타내는 다수성 통일형 품종인 밀양23호와 아프리카의 재래종인 O. glaberrima를 이용하여 밀양23호의 유전적배경을 보유한 근동질 계통인 BC4F1을 육성하고, 약배양을 통해 유전적 고정계통을 육성하였다. 이 중 50개계통을 우간다에서 생물검정을 실시한 결과, 아프리카에서 문제시되는 Yellow Mottle Virus (RYMV), Bacterial LeafStreak(BLS), 흰잎마름병 및 도열병에 복합저항성인 계통으로판명되었다. 특히 RYMV에 대한 저항성은 저항성원이 결여되어 있는 병으로 본 연구를 통해 육성한 계통들은 향후 아프리카에 적응하는 내병성 다수성 품종개발에 유용한 재료를 활용 될 것으로 생각된다.
        4,000원
        154.
        2015.10 구독 인증기관·개인회원 무료
        Most caterpillars, the larvae of butterflies and moths(Lepidoptera), are herbivorous. Even though their major role in the ecosystem, details of biology are poorly known for most species. This study has been carried out to identify larvae and to acquire useful biological information of insect larvae through rearing from 1997 to 2015 in HECRI(Holoce Ecosystem Conservation Research Institution). From 2012, 2013, 2014 we are carrying out ‘Larvae Identification and Specimen Security of Primary Endemic Moths in Korea Peninsula through Rearing’ supported by National Institute of Biological Resources(NIBR). Of these this study is the list about special caterpillars feeding on the foliage wild peach (Prunus spp.) Total 209 species belonging to 15 families were collected and 52 species belonging to 13 families identified. Among them wild peach dependent monophagous caterpillars are 17 species belonging to 9 families, oligophagous 1 species belonging to 1 families and polyphagous 34 species belonging to 9 families. The dominant family is Geometridae(65 species), second is Noctuidae(57 species) and followed by Pyralidae(21 species).
        155.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We investigated the period variation for 79 eclipsing binary systems using 20 years (1990-2009) of EROS, Macho, and OGLE survey observations. We discovered 9 apsidal motions, 8 mass transfers, 5 period increasing and decreasing systems, 12 light-travel-time effects, 5 eccentric systems and 40 other systems showing no period variations. We select 3 representative eclipsing binary systems; EROS 1052 for apsidal motion, EROS 1056 for mass transfer, and EROS 1037 for the light-travel-time effect. We determine the period variation rate (dP/dt), orbital parameters of the 3rd body (e3, ω3, f(m3), P3, T3), apsidal motion parameters (dω/dt, U, Ps, Pa, e) and apsidal motion period by analyzing the light curves and O-C diagrams.
        3,000원
        156.
        2015.09 구독 인증기관 무료, 개인회원 유료
        The intradermal test (IDT) has been developed for confirming diagnosis of canine atopic dermatitis (CAD). Prior to performing IDT, rapid immunoassay (Allercept E-screen 2nd generation; ES2G) can detect allergen-specific immunoglobulin E (IgE) antibodies in canine serum. The objective of this study was to evaluate agreement between IDT and immunoassay in diagnosis of CAD in domestic atopic dogs. Forty dogs were diagnosed with CAD in accordance with Favrot’s criteria. Intradermal testing was performed using 39 selected allergens. ES2G detected IgE antibodies specific for three allergen groups, including indoor allergens, grasses and weeds, and trees. Among 19 dogs diagnosed by IDT, the highest positivity was observed in house dust mites, followed by molds, epidermis and inhalants, house dust, and weeds. A total of 28 atopic dogs were evaluated by rapid ES2G immunoassay. Indoor allergens showed the strongest positive reaction, followed by grasses/weeds and trees. IDT and ES2G were performed concurrently in 17 dogs. The results of ES2G showed slight agreement with those of IDT. Level of agreement was highest for indoor allergens, which showed a predictive positive value of 100% in ES2G. These results indicate that a rapid immunoassay may be valuable for predicting the results of IDT in atopic dogs sensitized to indoor allergens.
        4,000원
        157.
        2015.07 구독 인증기관 무료, 개인회원 유료
        In establishing and overseeing ASIAPARC Federation in March of 2016 in Jeju Island Korea, it will be essential for us to learn aspiration, network, purpose, values, goals and strategies from 42 years experiences of EUROPARC Federation as our partnership organization such as practicing exchange programs and joint conferences. We also believe we can add one more principle, ‘Initiating Island Resilience’, into the three principles of the Jeju Declaration of 1) Scaling up Conservation, 2) Nature-based Solutions, and 3) Sustainability in Action through the opening of a "Green Growth Organization" of the Jeju Declaration of WCC 2012.
        4,000원
        158.
        2015.04 구독 인증기관·개인회원 무료
        Riptortus pedestris (F.) (Hemiptera: Alydidae) attacks several leguminous crops and its reproductive success is found to be affected by the leguminous host types. Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) is an egg parasitoid of R. pedestris and its quality attributes depend on the host egg quality. We, thus, investigated the performance of O. nezarae on eggs of R. pedestris fed on different leguminous seeds. Eggs collected from R. pedestris female adults obtained from rearing on one of the four hosts such as soybean, adzuki bean, mung bean, and cowpea seeds were exposed as a batch (n=15) to a single 4 to 5 day-old mated female O. nezarae. The eggs exposed were collected after 24 h. Number of parasitized eggs, sex ratio, development times, and adult emergence were recorded. The maximum number of eggs parasitized by O. nezarae were the eggs of mung bean fed R. pedestris. Eggs produced from the adzuki bean fed bugs had the lowest parasitization. There was no difference recorded in the developmental time of parasitoids emerged from the eggs of R. pedestris fed on different legumes. Proportion of male O. nezarae was highest on the eggs of cowpea seed fed adult bugs (26%); the lowest of that was found on the eggs of mung bean fed bugs (22.4%). Ooencyrtus nezarae can successfully parasitize eggs of R. pedestris regardless of hosts food sources. However, eggs of mung bean fed R. pedestris, among the tested legumes, were found to be of the best quality for reproductive success of O. nezarae.
        159.
        2015.03 구독 인증기관 무료, 개인회원 유료
        Antibiotics have been used to prevent disease, promote growth rate, and improve feed efficiency. However, the use of antibiotics in livestock has been restricted worldwide due to problems such as bacterial resistance. Therefore, probiotics among alternatives to antibiotics have gained attention in the livestock feed industry these days. This study was conducted to investigate the effects of dietary supplementation with probiotic 379D on safety, growth rate, and feed efficiency. In this study, bacterial strain 379D was isolated from soil and identified as a Bacillus sp. according to 16S rRNA sequence analysis. In an in vitro test, in-gel activity assay and antimicrobial susceptibility test were conducted to evaluate 379D. In an in vivo study, 379D was administered at concentrations of 0.1% and 1% to broiler chickens for 28 days. The results of in-gel activity assay and antimicrobial susceptibility test showed that strain 379D had broad spectrum antimicrobial activity. Furthermore, no adverse 379D-related effects were observed in 0.1% and 1% groups. Feed efficiency was higher in the 379D-treated groups than in the control group. In conclusion, 379D is expected to be used as a safe alternative to antibiotics in a feed supplement and will improve feed efficiency in broiler chickens.
        4,000원