• Bulletin of the Korean Chemical Society
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• 제19권10호
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• pp.1113-1116
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• 1998

A new graphite intercalation compound (GIC), n-octylammonium tetrachlorofeffate(Ⅲ)-graphite, has been derived from well-known ferric chloride graphite intercalation compound. X-ray diffration study shows that the basal spacing of this new GIC is 20.8 Å. In order to investigate the local geometry around the iron atom in the graphite layers, X-ray absorption spectroscopy experiments were performed. The first discharge capacity of its exfoliated form is found to be 862 mAh/g, which is more than double the value of pristine graphite (384 mAh/g). Such a drastic increase implies that the exfoliated graphite is a promising electrode material.

• 한국재료학회:학술대회논문집
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• 한국재료학회 1992년도 추계학술발표강연 및 논문개요집
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• pp.19-19
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• 1992

• Bulletin of the Korean Chemical Society
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• 제19권11호
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• pp.1274-1276
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• 1998

• 전산구조공학
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• 제19권2호
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• pp.28-35
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• 2006

• 전산구조공학
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• 제19권2호
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• pp.47-63
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• 2006

• 미생물학회지
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• 제55권2호
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• pp.177-179
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• 2019

미국 뉴저지주 중위도 산림토양에서 부식산(천연 복합유기화합물인 부식질의 주요 구성성분) 분해능이 있는 세균 균주 Pseudomonas kribbensis CHA-19를 분리하였으며, 이후 또 다른 토양 유기물인 리그닌과 리그닌 유래의 페룰산(ferulic acid)과 바릴린산(vanillic acid)의 분해능을 확인하였다. 부식질 초기 저분자화 효소(예, dye-decolorizing peroxidase와 laccase-like multicopper oxidase)와 부식질 유래의 다양한 저분자 분해산물들을 분해하는 효소(예, vanillate O-demethylase와 biphenyl 2,3-dioxygenase)를 탐색하기 위해 CHA-19 게놈염기서열을 분석하였다. 최종 확보한 효소유전자 정보는 토양세균의 부식질 분해경로 제안에 사용되었다.

• 한국환경과학회지
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• 제29권4호
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• pp.423-434
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• 2020

The effects of amino acid and/or urea liquid fertilizer application on the growth and phytochemicals of Perilla leaves were summarized as follows; The fresh weight of the perilla leaves was in the order of CF, CL, KLF, and control, and 39.7 g, 37.4 g, 36.5 g and 32.3 g were measured. The plant height increased by 71.6 cm in the CF treatment than in the control(54.6 cm). The number of nodes was 14.3 node in CF treatment and 19% more than control(12 node). The vitamin C content tends to be increased by fertilizing the amino acid solution in the perilla leaf. The components of polyvalent unsaturation of n-6 origin were measured in CF treatment, KLF treatment, and control in 10.19 mg, 10.18 mg, and 9.38 mg per 100 g, respectively. Glutamic acid, aspartic acid, leucine, arginine, alanine and lysin were contained in perilla leaf amino acid. Glutaminic acid content was found to be 455.1 mg, 495.6 mg, and 478.8 mg in the control, KLF and CF treatment per 100 g, respectively. Effective nutrition management using amino acid fertilizer optimizes crop yield and profitability, it is important to reduce the negative environmental risks of using fertilizer.

• Journal of Magnetics
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• 제19권3호
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• pp.241-247
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• 2014

The objective of this study was to study the effect of magnetized water on porcine cumulus cell-oocyte complexes (COCs). Oocytes obtained from female pig were cultured in a medium magnetized at 0, 2000, 4000, and 6000 Gauss (G) for 5 minutes using the neodymium magnet. Subsequently, intracellular hydrogen peroxide ($H_2O_2$) concentration, glutathione (GSH) activity, oocyte membrane integrity, anti-apoptosis factor Bcl-xL expression, and nuclear maturation were analyzed. The intracellular $H_2O_2$ levels in COCs cultured for 44 hours were not significantly different among the variously magnetized samples. However, GSH activity were significantly higher in the magnetized samples compared to the 0 G sample. The Bcl-xL mRNA expression in COCs cultured for 44 hours was higher in the 4000 G sample than other treatment groups. Membrane damage in COCs cultured for 22 and 44 hours was significantly lower in 4000 G group than control group. On the other hand, nuclear stages as maturation indicator significantly increased in 2000, 4000, and 6000 G groups compared to 0 G group. These results indicate that incubation of porcine oocytes and cumulus cells in magnetized medium improves intracellular GSH levels, membrane integrity and nuclear maturation, and inhibits apoptosis in vitro.

• 한국환경과학회지
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• 제19권7호
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• pp.807-818
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• 2010

The study is about variations in Carbonyl compounds concentration within apartment buildings according to pre-residence and residence. We consecutively investigated indoor air pollutants in 120 households in 6 cities at pre-residence and residence. Carbonyl compounds were collected using the 2,4-DNPH cartridge and were analyzed using HPLC. The carbonyls concentration of indoor air in the new apartments before occupation measured formadlehyde($76.0\;{\mu}g/m^3$), acetone($85.9\;{\mu}g/m^3$), acetaldehyde($13.8\;{\mu}g/m^3$). The carbonyls concentration of indoor air in the new apartments after occupation measured formadlehyde($233.1\;{\mu}g/m^3$), acetone($128.9\;{\mu}g/m^3$), acetaldehyde($29.8\;{\mu}g/m^3$), respectively. As a result, the mean concentration of carbonyl compounds within the pre-occupancy stage was lower than those of residence.

• Biomolecules & Therapeutics
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• 제19권4호
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• pp.411-418
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• 2011

Ginsenoside Rp1 (G-Rp1) is a novel ginseng saponin derivative with anti-tumor activity. However, the biochemical and molecular mechanisms of G-Rp1 on anti-tumor activity are not fully understood. In the present study, we report that G-Rp1 inhibits lung cancer cell proliferation, migration and adhesion in p53 wild-type A549 and p53-defi cient H1299 cells. Anti-proliferative activity of G-Rp1 in lung cancer cells is mediated by enhanced nuclear localization of cyclin-dependent kinase inhibitors including $p27^{Kip1}$ and $p21^{WAF1/Cip1}$, and subsequent inhibition of pRb phosphorylation. We also show that these anti-tumor activities of G-Rp1 in both A549 and H1299 cells appear to be mediated by suppression of mitogenic signaling pathways such as ERK, Akt and $p70^{S6K}$. Taken together, these findings suggest further development and evaluation of G-Rp1 for the treatment of lung cancers with mutated p53 as well as wild-type p53.