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Janis Strasser,Holly Seplocha,최일선 대한어린이교육협회 2007 어린이교육 Vol.- No.9
5살의 Levi는 교사가 읽어주는 ‘에포수몬다스는 왜 꼬리가 없을까(Why Epossumondas Has No Hair on His Tail)’(Sally, 2004)를 듣고 있다. 멋지게 구성된 매력적인 이야기 속에는 “빈둥거리는(lloygagging)”, “황급히 도망가다(skedaddle)”와 “감(persimmon)” 등의 몇 개의 익숙하지 않은 단어들이 있다. 더구나 리비가 “나의 사랑스런 작은 엉덩이(my sweet little pattootie)”와 “전혀 아니에요(no siree)”와 같이 예전에는 들어 보지 못한 어구들도 있다. 그림과 내용은 감을 먹는 즐거움을 너무나도 잘 표현하고 있기 때문에 교사의 이야기가 끝났을 때, Levi는 그 과일에 관한 질문을 한다. 다음날 교사는 몇 개의 감을 학급에 가져온다. 유아들은 그 감들을 관찰하고 자르고 맛을 보면서 이야기에서의 사건들을 회상하고 이야기의 한 부분인 노래도 해 보며, “분가루가 뭍은 불룩한 뒤쪽”이라고 상세하게 묘사된 부분을 기억한다. 얼마 후 Levi는 미술영역에서 감의 스케치를 하고 “PRSMN”으로 시작하는 단어를 쓰려고 시도한다. 유아들은 다음 며칠 동안 감에 관련된 노래를 부르자고 한다. 교사는 유아들에게 단어를 바꾸어 유아들만의 이야기를 만들자고 제안한다. 교사는 커다란 종이에 유아들의 이야기를 쓴다. 도서영역에서 처음으로 대집단으로 이야기 읽어주기를 해 준 뒤 2주 후, 3명의 유아들은 책에서 소리에 맞는 내용을 가리키며 파파포줌의 위에서 나는 소리인 “르르르르르”를 만들고 있다. 그들 중 두 명은 미술영역으로 가서 그 이야기를 실연하기 위한 인형들을 만들기로 한다. 교사는 유아들이 두꺼운 종이를 오려 만든 커다란 타원형에 실로 만든 물결모양의 눈과 꼬리를 붙이는 것을 보면서, 교사는 유아들에게 “너희들의 꼬리에 털이 없으면 어떤 좋은 점이 있다고 생각하니?” 라고 질문을 한다. 이 예는 그림책을 이용하여 교실에서 문해를 지원할 수 있는 다양한 방법이 있음을 보여준다. 문해 기술은 (“금주의 글자”와 같은 활동유형처럼) 분리해서 문해기술들을 강조하는 것 대신에 위의 예처럼 매력적인 유아의 그림책을 이용했을 때 형성할 수 있다.
The use of JIP test to evaluate drought-tolerance of transgenic rice overexpressing OsNAC10
Redillas, Mark C.F.R.,Strasser, Reto J.,Jeong, Jin-Seo,Kim, Youn-Shic,Kim, Ju-Kon The Korean Society of Plant Biotechnology 2011 Plant biotechnology reports Vol.5 No.2
In this study, the JIP test was exploited to assess drought-tolerance of transgenic rice overexpressing OsNAC10. Two types of promoters, RCc3 (root-specific) and GOS2 (constitutive), were used to drive the transcription factor OsNAC10, a gene involved in diverse functions including stress responses. Three-month-old plants were exposed to drought for 1 week and their fluorescence kinetics was evaluated. Our results showed that drought-treated non-transgenic plants (NT) have higher fluorescence intensity at the J phase (2 ms) compared to transgenic plants, indicating a decline in electron transport beyond the reduced plastoquinone ($Q_A^-$). As manifested by negative L bands, transgenic plants also showed higher energetic connectivity and stability over NT plants under drought conditions. Also, the pool size of the end electron acceptor at the photosystem I was reduced more in NT than in transgenic plants under drought conditions. Furthermore, the transgenic plants had higher $PI_{total}$, a combined parameter that reflects all the driving forces considered in JIP test, than NT plants under drought conditions. In particular, the $PI_{total}$ of the RCc3:OsNAC10 plants was higher than that of NT plants, which was in good agreement with their differences in grain yield. Thus, the JIP test proved to be practical for evaluating drought-tolerance of transgenic plants.
Gururani, M.A.,Upadhyaya, C.P.,Strasser, R.J.,Yu, J.W.,Park, S.W. Elsevier Scientific Publishers Ireland Ltd 2013 Plant science Vol.198 No.-
Manganese stabilizing protein (MSP) is an important component of the Photosystem II (PSII) oxygen evolving complex. In our previous work, transgenic potato plants with reduced expression of MSP (MSP-As) were developed and their physiological and biochemical responses were studied. In this report, we address the response of MSP-As plants toward salinity, heavy metal and osmotic stresses. MSP-As plants treated with NaCl, ZnCl<SUB>2</SUB> or mannitol solution showed significant level of tolerance under all the stress conditions. Specific enzyme activities of major ROS-scavenging enzymes were found significantly higher in MSP-As plants than the control plants. MSP-As plants accumulated increased levels of proline and low molecular weight metabolites such as ascorbate and α-tocopherol, which indicated that these plants were much more resistant to stress compared to the corresponding control plants. The primary photochemical efficiencies and the OJIP kinetics analyses further confirmed that MSP-As plants were in better optimal health under stress compared to the control plants. Although the exact reason behind the increased stress tolerance in stressed MSP-As plants is unclear, our results strongly indicate the role of MSP of unknown function in abiotic stress tolerance.
Rudling, Peter,Adamson, Ron,Cox, Brian,Garzatolli, Friedrich,Strasser, Alfred Korean Nuclear Society 2008 Nuclear Engineering and Technology Vol.40 No.1
One of the major current challenges to nuclear energy lies in its competitiveness. To stay competitive the industry needs to reduce maintenance and fuel cycle costs, while enhancing safety features. Extended burnup is one of the methods applied to meet these objectives However, there are a number of potential fuel failure causes related to increased burnup, as follows: l) Corrosion of zirconium alloy cladding and the water chemistry parameters that enhance corrosion; 2) Dimensional changes of zirconium alloy components, 3) Stresses that challenge zirconium alloy ductility and the effect of hydrogen (H) pickup and redistribution as it affects ductility, 4) Fuel rod internal pressure, 5) Pellet-cladding interactions (PCI) and 6) pellet-cladding mechanical interactions (PCMI). This paper discusses current and potential failure mechanisms of these failure mechanisms.
PETER RUDLING,RON ADAMSON,BRIAN COX,FRIEDRICH GARZAROLLI,ALFRED STRASSER 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.1
One of the major current challenges to nuclear energy lies in its competitiveness. To stay competitive the industry needs to reduce maintenance and fuel cycle costs, while enhancing safety features. Extended burnup is one of the methods applied to meet these objectives. However, there are a number of potential fuel failure causes related to increased burnup, as follows: 1) Corrosion of zirconium alloy cladding and the water chemistry parameters that enhance corrosion; 2) Dimensional changes of zirconium alloy components, 3) Stresses that challenge zirconium alloy ductility and the effect of hydrogen (H) pickup and redistribution as it affects ductility, 4) Fuel rod internal pressure, 5) Pellet-cladding interactions (PCI) and 6) pellet-cladding mechanical interactions (PCMI). This paper discusses current and potential failure mechanisms of these failure mechanisms.