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담배 Callus 및 삽수에 대한 세균성마름병균 (Pseudomonas solanacearum) 배양여액의 처리효과
이영근,이재열,김정화,Yi, Y.K.,Lee, J.Y.,Kim, J.H. 한국연초학회 1985 한국연초학회지 Vol.7 No.1
The typical dark brown stripe symptom of bacterial wilt disease was observed in the cuttings of tobacco stem treated with the culture filtrate of virulent Pseudomonas solanaceamm. And the tobacco callus create.4 with that culture filtrate showed deterioration of the callus 2 days after the treatment. On the contrary, the cuttings and the callus treated with the culture filtrate of the avirulent bacteria expressed no typical symptom and vigorous growth respectively. Therefore it was suggested that certain toxin which might be produced by the virulent bacteria could break down tobacco cells.
방사선을 이용한 느타리 ( Pleurotus ostreatus ) 의 섬유소 분해 변이주 선발
이영근,장화형,김원록,이창주,김진규 ( Young Keun Lee,Hwa Hyoung Chang,Won Rok Kim,Chang Joo Lee,Jin Kyu Kim ) 한국환경생물학회 1998 환경생물 : 환경생물학회지 Vol.16 No.2
To isolate the cellulolytic variants, the basidiospores of Pleurotus ostreatus were irradiated at the dose of 1Gy∼20kGy of gamma-ray. After irradiation the germination and survival rates of basidiospores were observed and the activity of extracellular enzyme was determined by means of MUF-substrate method. The 45 variants showed various levels of mycelial growth rate and cellulolytic activity on solid media and vari ous levels of activities of the extracellular enzymes. We have isolated highly cellulolytic variants. 1.5KG-2 and 2KG-2. among the above variants. It is suggested that the isolated 2 variants could be applied usefully to reuse and/or recycle of the cellulosic bioresources.
Fabrication of Boron-Doped Activated Carbon for Zinc-Ion Hybrid Supercapacitors
이영근,장해남,안건형,Lee, Young-Geun,Jang, Haenam,An, Geon-Hyoung Materials Research Society of Korea 2020 한국재료학회지 Vol.30 No.9
Zinc-ion hybrid supercapacitors (ZICs) have recently been spotlighted as energy storage devices due to their high energy and high power densities. However, despite these merits, ZICs face many challenges related to their cathode materials, activated carbon (AC). AC as a cathode material has restrictive electrical conductivity, which leads to low capacity and lifetime at high current densities. To overcome this demerit, a novel boron (B) doped AC is suggested herein with improved electrical conductivity thanks to B-doping effect. Especially, in order to optimize B-doped AC, amounts of precursors are regulated. The optimized B-doped AC electrode shows a good charge-transfer process and superior electrochemical performance, including high specific capacity of 157.4 mAh g<sup>-1</sup> at current density of 0.5 A g<sup>-1</sup>, high-rate performance with 66.6 mAh g<sup>-1</sup> at a current density of 10 A g<sup>-1</sup>, and remarkable, ultrafast cycling stability (90.7 % after 10,000 cycles at a current density of 5 A g<sup>-1</sup>). The superior energy storage performance is attributed to the B-doping effect, which leads to an excellent charge-transfer process of the AC cathode. Thus, our strategy can provide a rational design for ultrafast cycling stability of next-generation supercapacitors in the near future.