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Lee,Sang Hoon,Sung,Nak June,Park,Won Jong 대한방사선방어학회 1978 방사선방어학회지 Vol.3 No.1
Cs-137과 같은 반감기가 긴 방사성 핵종을 함유한 저준위 방사성 액체 폐기물을 국산 제올라이트 일종인 Clinoptillolite를 이용해서 처리할 수 있는가를 연구했다. Column 장치를 사용하여 Break-Though Curve를 얻어서 미국의 광물전문회사인 WARD에서 분류한 천연 Clinoptillolite 원광과 비교한 결과, 국산 Clinoptillolite에는 Break-Though Curve의 모양에 "Tailing"이 일어나는 것을 나타냈다. 국산 Clinoptillolite에 500ppm의 Cesium 용액에 2.5×10-3μCi/ml의 Cs-137을 넣어서 Cesium 이온고정능력을 실험한 결과 132meq/100g이 고정되었다. 또한 Tracer로 넣은 Cs-137이 75μCi/100g이 고정됨을 보여주었다. Investigation is carried out that low-level liquid radioactive wastes which is consisted of long half-life nuclides such as cesium can be treated by Korean clinoptillolite as a kind of zeolites. Column operation using a activated clinoptillolite shows good results in terms of break-through curves and comparing to clinoptillolite classified at WARD in U.S, Korean clinoptillolite shows a tailing phenomena longer than that of WARD. The fixation quantity of radioactivity in Korean clinoptillolite is to be about 75μCi/100g using a 2.5×10-3μCi/ml solution.
Seo, Sung Man,Ahn, Nak Ho,Shin, Jiho,Cho, Sung June,Camblor, Miguel A.,Hong, Suk Bong American Chemical Society 2015 Chemistry of materials Vol.27 No.18
<P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2015/cmatex.2015.27.issue-18/acs.chemmater.5b02741/production/images/medium/cm-2015-027416_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm5b02741'>ACS Electronic Supporting Info</A></P>
최낙중 ( Nak Jung Choi ),최준열 ( June-yeol Choi ),이봉춘 ( Bong-choon Lee ),김상민 ( Sang-min Kim ),나지은 ( Ji-eun Ra ),백채훈 ( Chai-hun Baik ),이종진 ( Jong Jin Lee ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.1
We analyzed the variation in occurrence time and intensity of attacks by the rice stem borer (Chilo suppressalis Walker) on several crops. This study aimed to understand how C. suppressalis damages crops and to utilize this basic data for the establishment of environment-friendly control methods like pheromone traps. This study surveyed the changes in occurrence patterns of C. suppressalis, biological characteristics of overwintering larvae, and the efficacy of different types of pheromone traps the years. We found similar occurrence patterns of C. suppressalis in different crops. In addition, occurrence time of the first generation was advanced. Overwintering larvae showed no difference in pupal period and weight compared to the non-overwintering ones. However, the larval period was reduced to 19.1 days in Miscanthus field, in contrast to that in the paddy fields. It was confirmed that larvae of C. suppressalis generally prefer the lower part of the stems of Miscanthus. Efficiency of the emergence trap was confirmed to be greater than that of the delta trap for capturing C. suppressalis adults. However, it is necessary to adjust the control period because of the advancement in occurring time of C. suppressalis in recent years. The larvae of C. suppressalis experience favorable environmental conditions for overwintering in Miscanthus fields. The major Miscanthus fields are generally located in the areas protected for sources of drinking water, owing to which spraying of chemical pesticides is very limited. The results of this study provide important inputs for the development of environment-friendly control methods.
Clinoptillolite에 의(依)한 Cs-137 핵종(核種) 흡착(吸着)에 관(關)한 연구(硏究)
이상훈,성낙준,박원종,Lee, Sang-Hoon,Sung, Nak-June,Park, Won-Jong Korean Association for Radiation Protection 1978 방사선방어학회지 Vol.3 No.1
Cs-137과 같은 반감기가 긴 방사성 핵종을 함유한 저준위 방사성 액체 폐기물을 국산 제올라이트 일종인 Clinoptillolite를 이용해서 처리할 수 있는가를 연구했다. Column 장치를 사용하여 Break-Through Curve를 얻어서 미국의 광물전문회사인 WARD에서 분류한 천연 Clinoptillolite 원광과 비교한 결과, 국산 Clinoptillolite에는 Break-Through Curve의 모양에 'Tailing'이 일어나는 것을 나타냈다. 국산 Clinoptillolite에 500ppm의 Cesium 용액에 $2.5{\times}10^{-3}{\mu}Ci/ml$의 Cs-137을 넣어서 Cesium 이온고정능력을 실험한 결과 132meq/100g이 고정되었다. 또한 Tracer로 넣은 Cs-137이 $75{\mu}Ci/100g$이 고정됨을 보여주었다. Investigation is carried out that low-level liquid radioactive wastes which is consisted of long half-life nuclides such as cesium can be treated by Korean clinoptillolite as a kind of zeolites. Column operation using a activated clinoptillolite shows good results in terms of break-through curves and comparing to clinoptillolite classified at WARD in U.S, Korean clinoptillolite shows a tailing phenomena longer than that of WARD. The fixation quantity of radioactivity in Korea clinoptillolite is to be about $75{\mu}Ci/100g$ using a $2.5{\times}10^{-3}{\mu}Ci/ml$ solution.
Framework Al zoning in zeolite ECR-1
Shin, Jiho,Ahn, Nak Ho,Cho, Sung June,Ren, Limin,Xiao, Feng-Shou,Hong, Suk Bong The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.16
<P>Rietveld analyses of the synchrotron X-ray diffraction data for various cation forms of zeolite ECR-1 have demonstrated framework Al zoning, which parallels the alternation of Al-rich maz and Al-poor mor layers. This can be further supported by notable differences in the average bond valence of its 10 crystallographically distinct tetrahedral sites.</P> <P>Graphic Abstract</P><P>The boundary phase zeolite ECR-1 was found to consist of ‘Al-rich’ maz and ‘Al-poor’ mor layers. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cc48403c'> </P>
Chung, Jae-Seung,Son, Nak Hoon,Lee, Sang Eun,Hong, Sung Kyu,Jeong, Chang Wook,Kwak, Cheol,Kim, Hyeon Hoe,Hong, Sung Hoo,Kim, Yong June,Kang, Seok Ho,Chung, Jinsoo,Kwon, Tae Gyun,Hwang, Eu Chang,Byun, The Korean Academy of Medical Sciences 2018 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.33 No.43
<P><B>Background</B></P><P>To examine survival rates and renal function after partial nephrectomy (PN) and radical nephrectomy (RN) in patients with chronic kidney disease (CKD).</P><P><B>Methods</B></P><P>We studied 4,332 patients who underwent PN or RN for pathological T1a-T2N0M0 renal cell carcinoma from 1988 to 2014. Patients were divided into two subgroups of CKD stage I–II and stage III. Kidney function, and survival outcomes were compared between groups.</P><P><B>Results</B></P><P>We included 1,756 patients with CKD I–II and 276 patients with CKD III in the final pair-matched analysis. Kidney function was significantly better preserved in the PN than in the RN group among all patients. However, the beneficial effect of PN on kidney function gradually disappeared over time in CKD III patients. The 5-year overall survival (OS) rates after PN and RN differed in patients with CKD I–II disease (99.4% vs. 96.5%, respectively, <I>P</I> = 0.015). The 5-year OS rates after surgery were not affected by mode of nephrectomy in CKD III patients (97.8% vs. 93.5%, <I>P</I> = 0.103). The 5-year cancer-specific survival rates did not differ between treatment groups in all CKD stage. Cox hazard analysis showed that the operative method was a significant factor for OS in CKD I–II patients (hazard ratio [HR], 0.320; confidence interval [CI], 0.122–0.840; <I>P</I> = 0.021). However, PN was not beneficial in terms of OS in CKD III patients (HR, 0.395; CI, 0.086–1.172; <I>P</I> = 0.117).</P><P><B>Conclusion</B></P><P>PN is associated with a higher OS rate and better kidney function in patients with preoperative CKD stage I and II, but not in those with CKD stage III.</P>