• Bulletin of the Korean Chemical Society
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• 제34권12호
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• pp.3609-3614
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• 2013

Orthorhombic and hexagonal lanthanum(III) hydroxycarbonate ($LaCO_3OH$) and $Ln^{3+}$-doped $LaCO_3OH$ ($LaCO_3OH:Ln^{3+}$, where Ln = Ce, Eu, Tb, and Ho) powders were prepared by a hydrothermal reaction under ambient pressure and characterized by thermogravimetry, powder X-ray diffraction, infrared and luminescence spectroscopy, and field-emission scanning electron microscopy. The polymorph of $LaCO_3OH$ depended on the reaction temperature, inorganic salt additive, species of $Ln^{3+}$ dopant, and solvent. The calcination of orthorhombic $LaCO_3OH:Ln^{3+}$ (2 mol %) powers at $600^{\circ}C$ yielded a mixture of hexagonal and monoclinic $La_2O_2CO_3:Ln^{3+}$ powders. The relative quantity of the latter increased with decreasing ionic radius of the $Ln^{3+}$ dopant ion and increasing doping concentrations. On the other hand, the calcination of hexagonal $LaCO_3OH:Ln^{3+}$ (2 mol %) powders at $600^{\circ}C$ resulted in a pure hexagonal $La_2O_2CO_3:Ln^{3+}$ powder, regardless of the species of $Ln^{3+}$ ions (Ln = Ce, Eu, and Tb). The luminescence spectra of $LaCO_3OH:Ln^{3+}$ and $La_2O_2CO_3:Ln^{3+}$ were measured to examine the effect of their polymorph on the spectra.

• Journal of Microbiology
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• 제39권1호
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• pp.79-82
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• 2001

The influence of levulinic acid (LA) on the production of copolyester consisting of 3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV) by Ralstonia eutropha was investigated. Addition of LA into the culture medium greatly increased the molar fraction of 3HV in the copolyester, indicating that LA can be utilized as a precursor of 3HV. In shake flask culture, the 3HV content in the copolyester increased from 7 to 75 mol% by adding 0.5 to 4.0 g/L LA to the medium containing fructose syrup as a main carbon source. A maximal copolyester concentration of 3.6 g/L (69% of dry cell weight) was achieved with a 3HV content of 40 mo1% in a jar fermentor culture containing 4.0 g/L of LA. When LA (total concentration, 4 g/L) was added repeatedly into a fermentor culture to maintain its concentration at a low level, the copolyester content and the 3HV yield from LA reached up to 85% of dry cell weight and 5.0 g/g, respectively, which were significantly higher than those when the same concentration of the LA was supplied al1 at once. The present results indicated that LA is more effective than propionate or valerate as a cosubstrate fur the production of copolyesters with varying molar fractions of 3HV by R. eutropha.

• 한국의류학회지
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• 제5권2호
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• pp.1-12
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• 1981

Nous avons essaye, dans cette etude, de deceler les caracteristiques de la silhouette du style d'Empire en eclairant it la fois le processus de sa formation ai travers La Monarchie, La Republique, Le Directoire, Le Consulat et l'Empire. Nous avons souligne comme suit: En premier lieu, comme les caracteristiques generaux, la simp lification et la democratisation. En second lieu, comme celles de La Monarchie et de La Republique, la transformation renovatrice en forme grossiere du style cylindriforme de la mode d'epoque ancienne. En troisieme lieu, comme celles du Directoire, la formation de l'unite esthetique au haut degre et les lignes naturelles du corps. En quatrieme lieu, comme celles du Consulat et de l'Empire, l'achevement du style d'Empire d'ornement somptueux refletant l'autorite politique de l'Empereur.

• 공업화학
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• 제9권2호
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• pp.255-260
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• 1998

금속수소화물 $LaNi_5$와 $LaNi_{4.5}Al_{0.5}$을 화학적 합성법으로 제조하여, 합성된 금속수소화물의 물성을 다양한 방법으로 확인하였다. $LaNi_5$와 $LaNi_{4.5}Al_{0.5}$은 2회 정도 수소화/탈수소화 반응을 시키면 활성화되었으며, 압력-농도-온도 곡선을 측정한 결과 각각 6개와 5.5개의 수소원자가 저장되었다. $LaNi_{4.5}Al_{0.5}$의 경우 수소화 반응속도를 초기속도법으로 구한 결과 비반응 수축핵모델이 잘 적용되었으며, 수소화반응의 율속단계는 $LaNi_{4.5}Al_{0.5}$의 표면에서 수소분자의 해리화학흡착임을 알 수 있었다. $LaNi_{4.5}Al_{0.5}$의 수소화반응 활성화에너지는 $9.506kcal/mol-H_2$이었으며, 반응속도식은 273~343K와 $P_o-P_{eq}=0.25{\sim}0.66atm$의 범위에서 아래와 같이 표시되었다. $\frac{dX}{dt}=4.636(P_o-P_{eq})$ exp$\frac{-9506}{RT}$).

• 대한한방부인과학회지
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• 제19권4호
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• pp.47-60
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• 2006

Purpose : This study was conducted to investigate the inhibitory effects of Scutellaria barbata D. D on on the cell proliferation of HeLa Cells. Methods : Human uterine cervical carcinoma HeLa cells were cultured in the 1%, 5% and 10% concentration of Scutellaria barbata D. D on solution for 24, 48 and 72 hours for the direct inhibitory effects of Scutellaria barbata D. D on. Then we examined the effect of Scutellaria barbata D. D on solution on the cell proliferation inhibition by XTT assay. DNA fragmentation, MAP kinase activity and caspase activity by FACS analysis in HeLa cells. Results : We found that the proliferation of HeLa cells was significantly decreased in Scutellaria barbata D. D on solution containing groups comparing with a control group in a concentration-dependant manner. When HeLa cells were cultivated for 24 hours with 5% Scutellaria barbata D. D on solution containing group, the percentage of HeLa cells with activated caspase was the highest. Scutellaria barbata D. D on solution reduced the MAP kinase activity of HeLa cells comparing with the control group. By the XTT assay, the cell's activity was decreased in 5% and 10% Scutellaria barbata D. D on solution containing groups in 24 and 72 hours cultivation and 10% group in 48 hours. DNA fragmentation and caspase-3 activity of HeLa cells, however, were changed insignificantly. Conclusion : From this study we could suggest that Scutellaria barbata D. D on is available to the inhibition and apoptosis of human cervical carcinoma cell line, HeLa cells in vitro.

• Advances in pediatric surgery
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• 제13권1호
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• pp.52-60
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• 2007

Pediatric laparoscopic appendectomy is controversial particularly in complicated appendicitis. We evaluated the outcomes of laparoscopic appendectomy (LA) and open appendectomy (OA) in simple appendicitis and complicated appendicitis respectively. Since June 2004, initial LA has been our policy in all appendicitis including complicated ones. A total of 160 patients were included in this study, consisting of 80 OA (August 2001 - August 2003) and 80 LA (June 2004 - June 2006). We compared the operating time, the length of hospital stay, the length of antibiotics use, and the postoperative complications between LA and OA. In simple appendicitis (73), there were no differences between LA and OA. However in the 87 patients with complicated appendicitis, the operating time was longer in LA (64.8 min vs. 50.2 min) but the length of hospital stay was shorter in LA than OA (8.5 days vs. 9.6 days). There was one complication in simple appendicitis group and six in complicated appendicitis group (3 cases in LA, 3 cases in OA). There was no difference in the results of LA versus OA in simple appendicitis. Therefore for simple appendicitis, LA is recommended in consideration of the cosmetic effect (fewer scar). In complicated appendicitis, early discharge was an advantage and there were no differences in complications in LA despite a longer operative time. So we conclude LA can be considered as the first choice of treatment for all pediatric appendicitis including complicated appendicitis. To confirm our impressions, more well controlled randomized prospective studied need to be done.

• Journal of Magnetics
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• 제2권2호
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• pp.46-49
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• 1997

This paper reports the first success in enhancement of the magneto-optic figure of merit of garnet films in blue wavelengths. The maximum of the absolute value of the Faraday rotation angle observed at about 500 nm for the films with no La substitution shifted toward shorter wavelength as La content increased, that leads the increase of the absolute value of the Faraday rotation angle in the wavelengths shorter than about 480 nm. The optical absorption coefficient at the wavelengths shorter than 500 nm decreased as La content increased. As a result the magneto-optic figure of merit increased in the wavelengths shorter than 470 nm as La content increased and was about two times larger for the film with La content of 0.6 in formular unit compared to that of the film without La substitution. This might be attributed to the shift of the centers of the charge transfer and crystal field transitions by La substitution.

• 한국환경성돌연변이발암원학회:학술대회논문집
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• 한국환경성돌연변이발암원학회 2001년도 Korean Environmental Mutagen Society
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• pp.43-44
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• 2001

• 미생물학회지
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• 제51권3호
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• pp.241-248
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• 2015

프로바이오틱스에 대한 연구는 주로 생균의 효과가 많이 알려져 있지만 가열 처리된 유산균인 사균체의 기능에 대한 연구도 활발히 이루어지고 있다. 본 연구에서는 락토바실러스 아시도필러스 CBT LA1의 사균체의 장관장벽 기능에 대하여 in vitro, in vivo에서 실험하였다. 이를 위하여, 세포표면 소수성 상호작용력(cell surface hydrophobicity), 자가응집력(autoaggregation), 세포에 부착하는 능력(cell adhesion)과 자가응집력(autoaggregation), LPS와의 결합력을 조사하였다. 또한 HT-29 장상피세포에서 LPS로 유도되는 IL-8의 발현을 억제하는 효과를 조사하였다. CBT LA1을 80도에서 121도까지 10분 동안 열을 처리하였을 때, 80도에서 열을 처리한 CBT LA1 사균체가 가장 높은 세포에 부착하는 능력을 보여 주었다. CBT LA1 생균과 비교했을 때, 80도에서 열을 처리한 CBT LA1 사균체는 높은 LPS와의 결합력, 소수성 상호작용력, 자가응집력, HT-29 세포에 부착하는 능력과 IL-8의 발현을 억제하는 능력을 보여주었다. In vivo 실험에서 FITC로 label된 LPS를 투여하였을 때 16시간 후, CBT LA1 사균체를 섭취한 동물의 장관 내 LPS가 가장 많이 제거되었다. 이러한 연구 결과들은 CBT LA1 생균처럼 CBT LA1 사균체도 장관장벽 기능을 가지며 이는, 파마바이오틱스로서 그 가능성을 시사한다.

• 트랜스-
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• 제2권
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• pp.131-160
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• 2017

Si on examine le bilan 2014 du CNC en France et celui du KOFIC en Corée du Sud, on peut s'apercevoir que l'éhelle industrielle cinématographique des deux pays est très similaire. On peut découvrir quelques chiffres à propos des résultats de l'industrie cinématographique dans ce bilan comme le nombre d'entrées, la recette des guichets, le nombre de production qui sont très similaires. La part de marché pour les films nationaux des deux pays augmente fortement en 2014. Mais ces chiffres de marché pour les films nationals sont les résultats obtenus dans les situations trés différentes des deux pays. En ce cas, la différence entre les deux pays vient d'où? Il en résulte de la politique de la culture cinématographique pour 'la sensibilisation du film comme une culture' des deux pays. Ceci est la partie la plus importante de la différence, qui est également visible dans la politique de la culture de France et de Corée du Sud. Depuis quelques années, le cinéma coréen se développe considérablement, à l'intérieur comme à l'extérieur du pays. Cependant, ce succès masque un certain déséquilibre de l'industrie cinématographique. On se rend compte également de la concentration du pouvoir par la monopolisation des grandes entreprises qui fonctionnent selon le principe de l'intégration verticale, et qui contrôlent toute la chaîne du marché cinématographique, de l'investisse111ent à la diffusion en passant par la production et la distribution. Il est impossible de trouver une solution dans des conditions défavorables où le phénomène du fort accaparement de l'industrie cinématographique coréenne est couplé avec à une logique industrielle de libéralisation du marché. Pour résoudre la monopolisation de l'industrie cinématographique coréenne, qui pose des problème décisifs et partials sur le marché, il va falloir une politique équilibrée de la promotion de la culture cinématographique menée par le KOFIC (Korean Film Council) qui est une organisation financée par le gouvemement. On voudrait proposer une politique de la culture cinématographique qui serait adaptée à la politique du cinéma de la Corée du Sud, à travers des recherches sur la situation actuelle ainsi que l'analyse comparée cles politiques du cinéma entre Corée du Sud et France.