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朴涌基,康秉秀 대한본초학회 2000 大韓本草學會誌 Vol.15 No.2
The antioxidation effects of Coicis Semen and Sophorae Radix on the radical scavenging ability from 1,1'-Diphenyl-2-picrylhydrazyl(DPPH), activities of nitrate reductase(NR) and the contents of glutathione(GSH) superoxide dismutase(SOD), catalase, lipid peroxidase(LPO) in rat liver cells were examined. In in vitro studies, Coicis Semen extract had greater DPPH-radical scavenging ability than Sophorae Radix. The NR activity in the cells was more increased by the treatments of Coicis Semen extracts than Sophorae Radix extract. In in vivo studies, the acetaminophen-induced inhibitions of SOD, GSH, LPO and catalase activities were significantly recoverd by the treatment of Coicis Semen and Sophorae Radix extracts. The recovery by Coicis Semen extract treatment was similar to the level of ascorbic acid treatment. Therefore, it seems that Coicis Semen extract has similar effects on the antioxidation compared with ascorbic acid, well-known antioxidant. These results suggest that Coicis Semen seems to have more potent effects on the antioxidation than Sophorae Radix extract.
Energy exchangeable multi-stage dry sorbent CO<sub>2</sub> capture process
박용기,서휘민,최원춘,강나영,박선영,민다영,김혜미 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
A dry sorbent CO<sub>2</sub> capture process was designed to reduce the thermal energy consumption. The process utilize heat of absorption for heat of regeneration by consisting 3 stage process, and it can reduce the total thermal energy demand of a single stage capture process by more than 50%. The concept was realized as a lab-scale facility that can deal with CO<sub>2</sub> containing gas mixture with a flow rate of 60N㎥/h. The facility was designed so as to make inter-stage heat exchange and intra-stage heat exchange possible, and to measure the heat exchange rate accurately. The process needs 3 kinds of sorbents that work at the 3 different temperature stages. Three spherical sorbents suitable for fluidized beds have been developed. Development results of the facility and the sorbents for the energy exchangeable dry sorbent CO<sub>2</sub> capture process will be presented, and the operation results of the 60N㎥/h facility will also be disclosed.
Fine structure of the CNS ganglia in the geometric spider Nephila clavata (Araneae: Nephilidae)
박용기,김효정,김훈,문명진 한국곤충학회 2013 Entomological Research Vol.43 No.6
As web spiders usually hang with their head downward, geometrical differences in body position could affect the organization of their central nervous system (CNS). Nevertheless, most of our knowledge of spider's CNS is dependent on what has been revealed from wandering spiders. To fill the gap, we describe here the fine structural organization of the ganglionic neurons and nerves in the geometric orb web spider Nephila clavata. Nerve cells in the supraesophageal ganglion in N. clavata are packed in the frontal, dorsal and lateral regions, but the nerve cells of the subesophageal mass are only restricted to the ventral and ventrolateral regions. High resolution transmission electron microscopy (TEM) reveals the fine structural details of the neuroglial cells and the neuronal cells which have a conspicuous Golgi apparatus, rough ER, free ribosomes and well‐developed mitochondria. Comparing fine structural characteristics of the CNS ganglia with those of wandering spiders in most respects, it has been revealed that the geometrical difference may affects to the arrangement of receptors in the central body known as an important association center for web building behavior. In particular, remarkable differences can be detected in the protocerebral area by the extraordinary development of the central body including absence of the globuli and associated mushroom bodies.