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윤나경,곽효원,이민규,이서경,이기훈,Yun, Na Kyong,Kwak, Hyo Won,Lee, Min Gyu,Lee, Seo Kyung,Lee, Ki Hoon 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.2
Heavy metal pollution is a serious problem that harms the environment and human health. As a means of removing heavy metal ions, especially Cr(VI), from a solution, we prepared a nanofibrous membrane from zein protein which is derived from maize. The zein nanofibrous membrane (ZNM) was prepared by using an 80% ethanol solution as a solvent. The resulting fiber had a ribbon-like structure. The size of the nanofiber could be controlled by varying the concentration of the zein in the ethanol solution. The ZNM was mounted in a membrane holder and a Cr(VI) feed solution was then continuously passed through the ZNM. The adsorption of Cr(VI) reached equilibrium within 3 min, indicating the rapid adsorption of the Cr(VI). To regenerate the ZNM adsorbent, the adsorbed Cr(VI) was removed by adding 0.1 M NaOH. We believe that ZNM would be an effective means of removing Cr(VI) from industrial waste.
Verb Dynamics? Two Types of Double Object Constructions in Korean and Spanish
윤나경 한국언어학회 2023 언어 Vol.48 No.2
In previous studies, the syntactic and semantic properties that characterize Double Object Constructions (DOC) and Pre/Postpositional Dative Constructions (PDC) were mainly based on English data. Nonetheless, there is empirical evidence that challenges several received claims that seem not to fully account for the (un)acceptability of DOCs in other languages. That is, the dative arguments in Korean and Spanish exhibit similar and different syntactic behaviors (e.g., (un)acceptability of passivized DOCs with accusative marker -ul/lul in Korean vs (un)acceptability of passivized DOCs with dative clitic doubling). This study presents results obtained from an acceptability judgment task to investigate whether and to what extent the syntactic class of the verb affects acceptability of Korean DOCs in which the accusative case marker -(l)ul appears on more than one NP in a single sentence in Korean (Yi & Park, 2022). Despite syntactic similarities in the two languages, few studies have investigated experimentally the crosslinguistic conditions that constrain the two types of DOCs in the two languages; particularly none of the studies has examined which factors affect the acceptability of DOCs in Spanish. Therefore, the study also examined two accounts of Spanish DOCs by investigating whether the presence of the dative clitic influences the structural change of dative constructions. Results of the Experiment 1 show that although native speakers of Korean were more accepting of the post-prepositional dative sentences than of the DOCs, the acceptability was affected by the syntactic class of the verb (ditransitive verb vs V+V compound verb (transitive verb + cwu- ‘give’)) and that the acceptability rating was gradient rather than strictly binary. Results of the Experiment 2 show that native speakers of Spanish were more accepting of non-clitic doubled sentences than of clitic doubled sentences and that the acceptability rating was gradient, supporting Pineda’s (2020a) account. Altogether, the results shown in the acceptability rating suggests that although a varying degree of productivity exists across the two languages, there are two types of DOCs in these languages.
기후변화와 관련된 환경일기 쓰기 교육이 초등학생들의 환경 친화적 태도와 환경 감수성에 미치는 영향
윤나경,이석희 에너지기후변화교육학회 2022 에너지기후변화교육 Vol.12 No.2
본 연구는 기후변화와 관련된 환경일기 쓰기 교육이 초등학생의 환경 친화적 태도와 환경 감수성에 어떤 영향을 미치는지를 알아보는 것에 목적이 있다. 연구 대상은 B광역시에 소재한 B초등학교 5학년 1개 반 27명(남 14명, 여 13명)을 연구집단으로 설정하여 연구를 진행하였다. 연구집단에서 기후변화와 관련된 10차시 수업 후 환경일기 쓰기를 실시하여 그 효과를 알아보았다. 본 연구의 수행을 위해서 우선 수업 처치 전 환경 친화적 태도와 환경 감수성에 대한 사전 검사지를 시행하였고 10차시의 수업 후 사후검사지 및 설문조사를 시행하여 그 결과를 비교 분석하였다. 본 연구의 결과는 다음과 같다. 첫째, 기후변화와 관련된 환경일기 쓰기 교육이 초등학생의 환경 친화적 태도 향상에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 기후변화와 관련된 환경일기 쓰기 교육이 초등학생의 환경 감수성 향상에 유의미한 효과가 있는 것으로 나타났다. 셋째, 기후변화와 관련된 환경일기 쓰기 교육을 한 후 학생들의 환경 오염 문제에 대한 관심도가 높아졌고 다른 교과에서 환경 관련 주제에 대한 이해도가 향상되었으며 스스로의 생활 습관 변화를 통하여 기후 변화 문제를 개선하려는 의지가 높아졌다. 위와 같은 결과를 토대로, 기후변화와 관련된 환경일기 쓰기 교육은 지속가능한 발전을 위해서 환경에 대해 알고 환경을 위한 마음으로 친환경 행동을 실천하는 시민을 양성하는데 효과적인 교육 방법으로 판단된다.
Strategies of Caffeine Loading into Silk Fibroin Film for Weight Loss Patch
윤나경,이기훈 한국잠사학회 2013 International Journal of Industrial Entomology Vol.27 No.2
Caffeine is a thermogenic agent that can be used in weight loss products. In order to achievea sustained release of caffeine, silk fibroin (SF) film was uses as carrier. It has been shownthat the loading method of caffeine into SF film affected the uniform distribution of caffeine inthe SF film. When caffeine was added directly into SF solution, gelation has been occurredimmediately and prevented the uniform distribution of caffeine. On the other hand, caffeinewas dissolved in methanol in order to load the caffeine in SF film and crystallize the SF film atthe same time. However, due to the fast evaporation of methanol, caffeine was recrystallizedon the surface of SF film rather than penetrating into the film. Finally, caffeine was loaded intopre-crystallized SF film and uniform distribution of caffeine could be achieved. There was aninitial burst of caffeine during the first 15 min, but after that a sustained release was achieved.
Spanish Dative Arguments in Passives
윤나경 서울대학교 라틴아메리카연구소 2021 이베로아메리카硏究 Vol.32 No.1
This paper offers an account of the acceptability and unacceptability of certain datives in periphrastic passives. Demonte(1995) observes that core (argumental) datives can appear in the passives, while non-core (non-argumental) datives cannot. I argue that core and non-core datives should receive a distinct analysis, in order to account for their distinct behavior in periphrastic passives. Passivization, nominalization and sluicing data in ditransitives and transitives demonstrate that the argument structure properties of core and non-core datives are different. In addition, I claim that the clitic doubling is a morphological realization of Agree with the little v. Those dative DPs that require clitic doubling are the same DPs when doubled in passives that result in ungrammatical periphrastic passive. When they appear in actives, the clitic must be present, reflecting the obligatory Agree with little v to license them. In passives, however, PrtP somehow blocks this Agree relation with v, thus they are not licensed.