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曺圭燐,李相淑,權五溶 충남대학교 1991 忠南科學硏究誌 Vol.18 No.1
This work was accomplished to determine the effect of 2,4-dinitrophenol (DNP) on in vivo nitrate reductase activities(NRA) in the shoots of 6 day old rye(Secale cereale L.) seedlings. The NRA in the shoots of rye seedlings pretreated with 0.5mM DNP was higher than that of the control group in all the experimental conditions as below. The optimal concentration of KNO_3 for maximum NRA was 10mM in both the control and treated group. The NRA accumulated with the treatment of 10mM KNO_3 was gradually increased for 4 hours in both groups, and then maintained constantly. On the other hand, the NRA occurred per hour was highest at 1 hour in both groups, while it was declined subsequently. The optimal pH for NRA was 7.5 in both groups. The daily pattern of NRA was markedly decreased for 4 days in both groups, and decreased slowly to 7 days. The NRA was greatly inhibited in the solutions of 200mM KCI and NaCl. According to the treatment time with the solutions of 200mM KCI and NaCl, the NRA was extremely inhibited at 2 hours, thereafter recovered slowly from its inhibition effects.
李相淑,曺圭燦,權五溶 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.1
The effects of plant growth regulators on α-amylase activities in the embryonic axis-attached and detached cotyledons of mung bean (Phaseolus radiatus L.) have been investigated. α-Amylase activities in the attached cotyledons of developing mung bean have been markedly increased for 3 days after the imbibition and then gradually decreased. The changes of α-amylase activity have accorded with changes on the band density of α-amylase isozymes in the attached and detached cotyledons. Two bands of isozyme have appeared on day 3 in the attached cotyledons, but on day 4 in the detached cotyledons. When the 10^-6 M solutions of GA_3 and kinetin have been exogenously supplied in the detached cotyledons for 3 days, α-amylase activities have occurred with about 1.5-fold in GA_3 and 1.25-fold in kinetin rather than the control. α-Amylase activities have been increased with 1.8-fold in the detached cotyledons treated with the 10^-3 M and 10^-4 M solutions of IAA. In contrast with the treatment of IAA, α-amylase activities have been increased with 3.5-fold in the detached cotyledons treated with the 10^-5 M and 10^-6 M solutions of 2, 4-dichlorophenoxyacetic acid belonged to synthetic auxin. Consequently, it has been indicated that the embryonic axis in the cotyledons of mung bean has been directly influence on α-amylase activity, and the α-amylase activity of the detached cotyledons treated with a 10^-6 M solution of 2, 4-dichlorophenoxyacetic acid has developed much increased effect. For this reason, it has been suggested that auxin from the embryonic axis has been probably induced α-amylase in the attached cotyledons during germination of mung bean.
조규찬(Gyu Chan Jo),이상숙(Sang Suk Lee),권오용(Oh Yong Kwon) 한국식물학회 1991 Journal of Plant Biology Vol.34 No.4
This work was carried out to determine the effect of 2,4-dinitrophenol(DNP) on in vivo nitrate reductase activity in the roots of 6 day old rye (Secale cereale L.) seedlings. The nitrate reductase activity in the roots of 6 day old rye seedlings pretreated with 0.5 mM DNP was higher than that of the control group in all the experimental conditions. The optimal concentration of KNO_3 for maximum nitrate reductase activity was 10 mM in both control and treated group. The nitrate reductase activity in the treatment of 10 mM KNO_3 gradually increased for 4 h in both groups, and then maintained constantly. The nitrate reductase activity occurred per hour was highest at 1 h in both groups, while it was declined by large degrees as time goes on. The daily pattern of nitrate reductase activity was gradually decreased in both groups with the passage of day. The optimal pH for nitrate reductase activity was 7.5 in both groups. From the results of this experiment and a previous paper(Kwon et al., 1991), it was determined that the nitrate reductase activity in both roots and shoots of rye seedlings was increased by the treatment of 0.5 mM DNP, and particulary in both grous, the nitrate reductase activity in the roots of rye seedlings was higher than that in shoots of them.
일반연제 발표 : 저 포도당 대사산물 복막투석액의 사용이 복막염증, 복막의 구조적 변화 및 복막 혈관생성 지표들에 미치는 영향
김찬덕 ( Kim Chan Deog ),김용림 ( Kim Yong Lim ),도준영 ( Do Jun Yeong ),박선희 ( Park Seon Hui ),조규향 ( Jo Gyu Hyang ),박종원 ( Park Jong Won ),윤경우 ( Yun Gyeong U ),조동규 ( Jo Dong Gyu ),이은계 ( Lee Eun Gye ),김인산 ( Kim 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1
Jo, Eun-young,Park, Seung-Min,Yeo, In-seol,Cha, Jae-doo,Lee, Ju Yeol,Kim, Young-Hee,Lee, Tae-Kwon,Park, Chan-gyu Informa UK (Taylor Francis) 2016 Desalination and Water Treatment Vol.57 No.17
<P>Wet scrubber is widely used to remove pollutants from a furnace flue gas or from other gas streams. However, high cost for the treatment or exchange of contaminated washed water is one of the problems. Electrocoagulation (EC) is an electrochemical method for treating polluted water, whereby sacrificial anodes dissolve to produce active coagulant precursors in the solution. This technology can be used for the removal of color, anionic contaminants, and colloidal particles. The goal of the present study was evaluation of EC process for treatment of wet scrubber wastewater and optimization of the process. In this study, the influence of electrode material and electrode distance on removal efficiency (%) of nitrate, sulfate, and total suspended solids (TSS) was investigated with synthetic wastewater. Using an Al electrode, 60.6% of nitrate, 50.0% of sulfate, and 96.8% of TSS were removed by EC treatment within 30 min. In case of Fe electrode, 69.7% of nitrate, 75.0% of sulfate, and 98.8% of TSS were removed. The treatment efficiency for real wet scrubber wastewater was evaluated with Fe electrode. After 180 min of EC treatment, 50% of color, 40% of nitrate, 40% of sulfate, and 95% of TSS were removed, respectively. All these results give clear evidence that EC process can effectively reduce the TSS, nitrate, and sulfate ions from wet scrubber wastewater.</P>
Effect of anions on the removal of bisphenol A in wastewater by electro-oxidation process
Jo, Eun-Young,Lee, Tae-Kwon,Kim, Younghee,Park, Chan-Gyu Balaban Publishers 2016 Desalination and Water Treatment Vol. No.
<P>Bisphenol A (BPA), an endocrine-disrupting chemical, exists widely in natural waters. Advanced oxidation processes, which are based on the generation of hydroxyl radicals (OH), are one of the promising techniques for the treatment of BPA. The goal of the present study was to investigate the effect of nitrate, bicarbonate, and carbonate in wastewater treatment plant (WWTP) effluent on the removal of bisphenol A (BPA) by bench-scale electro oxidation (EO) process using DSA-Ti electrode. The removal efficiency of BPA against scavenger effect of nitrate and alkalinity was characterized under a variety of reaction time and current densities. In the current density of 3mA/cm(2), the BPA removal efficiencies showed 40% within 20min in the presence of nitrate, whereas the BPA removal efficiency was close to 100% in the absence of nitrate. Under the same condition, 42 and 80% of BPA was removed in the presence of bicarbonate and carbonate, respectively. The results indicated that the EO process is a promising technology to remove BPA effectively in WWTPS. However, since the efficiencies of the EO process were remarkably reduced when the concentrations of anions in WWTPs increased, electrochemical technology such as EO process could be used only to oxidize the non-biodegradable compounds during the WWTP process.</P>
Jung, Chan Su,Kim, Han Sung,Im, Hyung Soon,Park, Kidong,Park, Jeunghee,Ahn, Jae-Pyoung,Yoo, Seung Jo,Kim, Jin-Gyu,Kim, Jae Nyeong,Shim, Ji Hoon American Chemical Society 2015 NANO LETTERS Vol.15 No.6
<P>Phase-change nanowires (NWs) have emerged as critical materials for fast-switching nonvolatile memory devices. In this study, we synthesized a series of <I>m</I>GeTe·Bi<SUB>2</SUB>Te<SUB>3</SUB> (GBT) pseudobinary alloy NWsGe<SUB>3</SUB>Bi<SUB>2</SUB>Te<SUB>6</SUB> (<I>m</I> = 3), Ge<SUB>4</SUB>Bi<SUB>2</SUB>Te<SUB>7</SUB> (<I>m</I> = 4), Ge<SUB>5</SUB>Bi<SUB>2</SUB>Te<SUB>8</SUB> (<I>m</I> = 5), Ge<SUB>6</SUB>Bi<SUB>2</SUB>Te<SUB>9</SUB> (<I>m</I> = 6), and Ge<SUB>8</SUB>Bi<SUB>2</SUB>Te<SUB>11</SUB> (<I>m</I> = 8)and investigated their composition-dependent thermal stabilities and electrical properties. As <I>m</I> decreases, the phase of the NWs evolves from the cubic (C) to the hexagonal (H) phase, which produces unique superlattice structures that consist of periodic 2.2–3.8 nm slabs for <I>m</I> = 3–8. <I>In situ</I> temperature-dependent transmission electron microscopy reveals the higher thermal stability of the compositions with lower <I>m</I> values, and a phase transition from the H phase into the single-crystalline C phase at high temperatures (400 °C). First-principles calculations, performed for the superlattice structures (<I>m</I> = 1–8) of GBT and <I>m</I>GeTe·Sb<SUB>2</SUB>Te<SUB>3</SUB> (GST), show an increasing stability of the H phase (versus the C phase) with decreasing <I>m</I>; the difference in stability being more marked for GBT than for GST. The calculations explain remarkably the phase evolution of the GBT and GST NWs as well as the composition-dependent thermal stabilities. Measurement of the current–voltage curves for individual GBT NWs shows that the resistivity is in the range 3–25 mΩ·cm, and the resistivity of the H phase is lower than that of the C phase, which has been supported by the calculations.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2015/nalefd.2015.15.issue-6/acs.nanolett.5b00755/production/images/medium/nl-2015-007559_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl5b00755'>ACS Electronic Supporting Info</A></P>
최규하 ( Gyu-ha Choi ),신예찬 ( Yea-chan Shin ),조윤석 ( Youn-seok Jo ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.2
우리는 ICT의 발전과 디지털 장치의 빠른 대중화 속도에 의하여 유비쿼터스가 현실화 되고 있는 사회에 살고 있다. 그러나 빠른 속도로 기술이 발전하는 반면에 사이버 범죄의 대한 인식과 대처는 발달의 속도를 따라가지 못하고 있다. 사이버 범죄는 다양한 방법으로 늘어가고 그에 따른 피해가 커지고 있지만 일반인들은 그에 따른 대처를 하지 못하고 전문가에게만 의존하고 있다. 따라서 우리는 일반 사용자도 쉽게 사용할 수 있는 레지스트리 분석기를 개발하여 디지털 포렌식 관점에서 유용한 정보를 제공하고 개인정보 침해 및 각종 디지털 범죄에 대한 인식을 개선시켜 보려고 한다.