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신은섭,김환기 대한상하수도학회 2002 상하수도학회지 Vol.16 No.2
Water quality in Mankyeong river has been degrading for the last two decades. In Mankyeong river watershed, there were many places that did not meet the river water quality standards due to the pollution sources such as increase of population, industries and livestock. Thus the rate of achievement for the river water quality standard in Mankyeong river watershed is very low. The purpose of this study was to evaluate of propriety for the water quality standard matched to each the standard water quality monitoring site in Mankyeong river. QUAL2E model was used to simulate the BOD concentration at each monitoring site. The Mankyeong river watershed was divided into 30 drainage basins and linked with the model structure. In order to run the model, main stream and one major tributary within this watershed were divided into 14 reaches and 51 computational elements. The low water flow (Q_275) in 1997 was used for the calibration. The waste loads allocation is conducted to calculate the environmental capacity of each watershed and simulate the suitable water quality standard at each site. This study was shown that the river water quality standards should be reset at several sites such as Samrye, Kimje, Soyang stream 2, Jeonju stream 6 and Iksan stream.
참죽나무(Cedrela sinensis Juss)의 培養細胞로 부터 體細胞胚 形成과 人工種子 生産
蘇雄永,呂邑東,蘇祥燮 全北大學校 基礎科學硏究所 1991 基礎科學 Vol.14 No.2
참죽나무의 배양세포를 물리 및 화학적인 복합방법으로 동조화를 거쳐 균일한 체세포배형성을 시도하였던바 85%의 높은 향상율을 보였다. 이에 다시 몇가지 아미노산, ABA 및 저온처리를 하여 얻은 정상적인 체세포배를 인공종자로 만들었다. 아미노산 중에서 aspartic acid 및 asparagine의 처리는 정상체세포배형성에 효과적이었는데 인공종자발아에는 별로 성과를 나타내지 않았다. ABA 및 저온처리로 정상체세포배형성율을 향상시킬 수 있었으나 인공종자의 발아에는 저온처리를 한 경우가 더욱 효과적이었다. 그러므로 간단하게 저온처리를 하여 경화된 건실한 체세포배 및 인공종자를 얻을 수 있고 이로 부터 클론식물의 대량생산이 가능할 것으로 사료된다. Somatic embryogenesis in cell suspension cultures of Cedrela sinensis Juss. was synchronized by physical and chemical treatments. Using culture medium containing aspartic acid and asparagine of 5mM each, the quality of somatic embryo from synchronized cell clumps was enhanced, but it was not effective for artificial seed germination. Somatic embryos were singly encapsulated with alginic acid to be used as an artificial seed. To improve the germination rate of artificial seeds, somatic embryos were hardened by ABA and low temperature(4℃) treatments before encapsulation. Low temperature treatment was more effective than ABA treatment.
Jin, Young-Eup,Kim, Sun-Hee,Lee, Hyo-Jin,Song, Su-Hee,Kim, Yun-Na,Woo, Han-Young,Lee, Kwang-Hee,Suh, Hong-Suk Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.12
New poly(cyclopenta[def]phenanthrene) (PCPP)-based conjugated copolymers, containing carbazole units as pendants, were prepared as the electroluminescent (EL) layer in light-emitting diodes (LEDs) to show that most of them have higher maximum brightness and EL efficiency. The prepared polymers, Poly(2,6-(4-(6-(Ncarbazolyl)- hexyl)-4-octyl-4H-cyclopenta[def]phenanthrene)) (CzPCPP10) and Poly(2,6-(4-(6-(N-carbazolyl)- hexyl)-4-octyl-4H-cyclopenta[def]phenanthrene))-co-(2,6-(4,4-dioctyl-4H-cyclopenta[def]phenanthrene)) (CzPCPP7 and CzPCPP5), were soluble in common organic solvents and used as the EL layer in light-emitting diodes (LEDs) of configuration with ITO/PEDOT/polymer/Ca/Al device. The polymers are thermally stable with glass transition temperature (Tg) at 77-100 °C and decomposition temperature (Td) at 423-457 °C. The studies of cyclic voltammetry indicated same HOME levels in all polymers, although the ratios of carbazole units are different. In case of PLEDs with configuration of ITO/PEDOT/CzPCPPs/Ca/Al device, The EL maximum peaks were around 450 nm, which the turn-on voltages were about 6.0-6.5 V. The maximum luminescence of PLEDs using CzPCPP10 was over 4400 cd/m2 at 6.5 V, which all of the maximum EL efficiency were 0.12 cd/A. The CIE coordinates of the EL spectrum of PLEDs using CzPCPP10 was (0.18, 0.08), which are quite close to that of the standard blue (0.14, 0.08) of NTSC.
Jin, Young-Eup,Kang, Jeung-Hee,Song, Su-Hee,Park, Sung-Heum,Moon, Ji-Hyun,Woo, Han-Young,Lee, Kwang-Hee,Suh, Hong-Suk Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.1
New PPV derivatives which contain electron-withdrawing CF3F4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6-tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF3F4P-PPV (0.51 cd/A) was higher than that of CF3F4P-PPV (0.025 cd/A).
이앙전처리 제초제와 육묘상처리 농약의 근접처리시 벼 생육에 미치는 영향
박재읍(Jae-Eup Park),이인용(In-Yong Lee),소재성(Jae-Sung Soo),백성열(Sung-Yeol Baek),문병철(Byung-Chul Moon),오세문(Se-Moon Oh) 韓國雜草學會 2009 Weed&Turfgrass Science Vol.29 No.1
이앙전처리제초제와 육묘상 처리 살균·살충제의 근접처리시 벼 생육에 미치는 영향을 조사하였다. 육묘상 처리제를 처리한 후 당일 이앙한 벼보다 경과일수가 3일에서 7일후 길어질수록 벼 생육에 미치는 영향이 높았고, 약제간 근접처리시의 약제반응은 이앙 전처리 제초제중 뷰타클로르유탁제 처리 보다 옥사 디아존유제 처리구에서, 육묘상 처리제는 티디아닐·클로티아니딘입제 근접처리시 다른 역제보다 벼생육에 미치는 영향이 높게 나타났다. The result of short interval application between rice pre-transplanting herbicide and other box raising rice seedling treatment pesticides, rice growth showed differential responses when treated with short interval of box raising rice seedling treatment pesticides after treatment of rice pre-transplanting herbicide. The inhibition of rice growth were higher when transplanted at 3 to 7 day after treatment than transplanted direct after treatment of box raising rice seedling treatment pesticides. The phytotoxicity of pre-transplanting herbicide, oxadiazon EC were higher than butachlor EW and were higher when treated with tiadinil·clothianidin GR of box raising rice seedling treatment pesticides.