• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.2
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• pp.247-255
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• 2004

The purpose of this study was to examine the effects of resin composite monomers (Bis-GMA, TEGDMA, EGDMA, UDMA, HEMA, Camphorquinone) on the growth of the two cariogenic bacteria, Streptococcus mutans and Streptococcus sobrinus. We obtained the following results : 1. The growth rate of S. mutans and S. sobrinus was decreased significantly in the group of all composite resin monomer at a concentration of 0.03mmo1/L(P<0.01). 2. The growth rate of S. mutars in the group of UDMA at a concentration of 0.01 mmol/L and the group of CQ at a concentration of 0.005 mmol/L, 0.01 mmol/L was decreased significantly compared to the control group(P<0.01). 3. The growth rate of S. sobrinus in the group of HEMA, UDMA at a concentration of 0.01 mmol/L and the group of CQ at a concentration of 0.005mmol/L. 0.01mmo1/L was decreased significantly compared to the control group (P<0.01). 4. The growth rate of S. sobrinus in the group of EGDMA at a concentration of 0.001, 0.01, 0.03mmo1/L was decreased significantly compared to the control group(P<0.01) and were showed to be statistically significant difference between experimental groups(P<0.01).

• Applied Biological Chemistry
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• v.47 no.1
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• pp.27-32
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• 2004

The antagonistic microorganisms against Salmonella gallinarum causing fowl typhoid were isolated from the gut of wild pheasant. The isolated L19, L33, L50 strains were showed the characteristics of isolated Gram negative, rods, catalase positive and oxidase negative. Finally, all strains were identified as Sphingomonas sanguis by $Biolog^{\circledR}$ system. The optimal carbon sources of Sphingomonas sanguis L19, L33 and L50 for the these growth ~ere glucose, saccharose, and fructose respectively. But the optimal carbon sources of S. sanguis L19,L33, L50 for the antagonistic material production were maltose, galactose, and saccharose respectively. The optimal nitrogen sources of S. sanguis L19, L33, L50 for the growth were yeast extract, yeast extract, and $NH_4H_2PO_4$ respectively. But the optimal nitrogen sources of S. sanguis L19, L33 and L50 for the antagonistic material production were $(NH_4)_2SO_4$ urea, $(NH_4)_2S_2O_8$ espectively.

• Journal of the Korean Mathematical Society
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• v.54 no.3
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• pp.967-986
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• 2017

We give the necessary condition for an operator defined on a cartesian product of $c_0(\mathcal{X})$ spaces to be summing or dominated and we show that for the multiplication operators this condition is also sufficient. By using these results, we show that ${\Pi}_s(c_0,{\ldots},c_0;c_0)$ contains a copy of $l_s(l^m_2{\mid}m{\in}\mathbb{N})$ for s > 2 or a copy of $1_s(l^m_1{\mid}{\in}\mathbb{N})$, for any $l{\leq}S$ < ${\infty}$. Also ${\Delta}_{s_1,{\ldots},s_n}(c_0,{\ldots},c_0;c_0)$ contains a copy of $l_{{\upsilon}_n(s_1,{\ldots},s_n)}$ if ${\upsilon}_n(s_1,{\ldots},s_n){\leq}2$ or a copy of $l_{{\upsilon}_n(s_1,{\ldots},s_n)}(l^m_2{\mid}m{\in}\mathbb{N})$ if 2 < ${\upsilon}_n(s_1,{\ldots},s_n)$, where ${\frac{1}{{\upsilon}_n(s_1,{\ldots},s_n})}={\frac{1}{s_1}}+{\cdots}+{\frac{1}{s_n}}$. We find also the necessary and sufficient conditions for bilinear operators induced by some method of summability to be 1-summing or 2-dominated.

• Microbiology and Biotechnology Letters
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• v.36 no.1
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• pp.28-33
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• 2008

The expression vector (pWHM3-TR1R2) for sprT gene encoding Streptomyces griseus trypsin (SGT) followed by two regulatory genes, sgtR1 and sgtR2, was introduced into Streptomyces lividans TK24 and Streptomyces griseus IFO 13350. Various media with different compositions were used to maximize the productivity of SGT in the recombinant trains. he SGT productivity was best when the transformant of S. lividans TK24 was cultivated in R2YE medium (0.74 unit/mL) at 5 days of cultivation. C5/L (0.66 unit/mL) medium also gave a good productivity, but Livid (0.08 unit/mL) and NDSK (0.06 unit/mL) yielded poor productivities. S. griseus IFO 13350/pWHM3-TR1R2 produced SGT by 1.518 unit/mL (C5/L), 1.284unit/mL (R2YE),0.932 unit/mL (NDSK), and 0.295 unit/mL (Livid) at 7 days of cultivation, which was much higher than those from S. lividans TK24/TR1R2. The SGT protein was purified from the culture broth of S. griseus IFO 13350/pWHM3-TR1R2 in C5/L to homogeneity via ammonium sulfate fractionation, and CM-sepharose and SP-sepharose column chromatographies. The specific activity of purified SGT was 69,252 unit/mg, and the final purification fold and recovery yield were 6.5 and 1.4%, respectively.

• YAKHAK HOEJI
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• v.47 no.6
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• pp.450-455
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• 2003

Synthesis of (lR,5S,6S)-6-[(lR)-1-hydroxyethyl] -2-[(3S,5S)-5-(2-ethoxycarbonyl-1-moxy(hydroxy)iminoethyl)pyrrolidine-3-ylthio]-1-methylcarbapen-2-em-3-carboxylic acids (10a,l0b) were described. Methyl(2S,4S)-4-tritylthio-1-(allyloxycarbonyl)pyrrolidine-2-carboxyla late (I) was prepared from trans-4-hydroxy-L-proline with (2S,4R)-abs olute configuration as starting material. (2S,4S)-1-allyloxycarbonyl-2-(2-ethoxycarbonyl-hydroxy(methoxy )iminoethyl)-4-mercapto- pyrrolidines (6,7) were obtained from the tritylthio compound (I). (lR,5S,6S)-6-[(lR)-1-hydroxyethyl]-2-[(3S,5S)-5-(2-ethoxycarbonyl-1-methoxy(hydroxy)imino-ethyl)pyrrolidine-3-ylthio]-1-methylcarbapem-2-em-3-carboxylic acids (10a,10b) were obtained by the coupling reaction with carbapenem diphenylphosphates (8) and pyrrolidine-thiol moiety (6,7). Their in vitro antibacterial activities against both Gram-positive and Gram-negative were tested. Compounds ( 10a,10b) showed potent antibacterial activity except pseudomonas aerusinosa.

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.11a
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• pp.86-87
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• 2000

• Animal Systematics, Evolution and Diversity
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• v.2 no.2
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• pp.1-12
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• 1986

Genetic and morphological variation among seven populations of two species of the genus Liobagrus that had been collected from six separate river systems in Korea were analyzed by means of starch electrophoreiss and discriminant function analysis . The degree of genic variation among three population of L.andersoni was P=21.3%, H=0.068 , and that of four population of L.mediadiposalis was P=16.3%, H=0.560. Rogers' gentic similarity coefficient (S) of L.andersoni and L.mediadiposalis were S=0.592 , S=0.675 respectively. In morphometric characters of L. andersoni, the population from Kum River was distinctly different from other conspecific populations.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.28 no.3
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• pp.1-7
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• 2022

Background: Manual traction with a belt is a physiotherapy treatment method that reduces disk pressure and widens the disk space. In clinical settings, it is applied to numerous patients with herniated intervertebral disk (HIVD). This study aimed to identify the effects of manual traction with a belt on the intervertebral space in patients with lumbar HIVDs. Methods: The intervention was performed on 17 patients with lumbar HIVDs who were divided into two groups: one with eight patients having HIVD at L4~L5 and another group with nine patients having HIVD at L5~S1. The participants received manual traction with a belt twice a week for 12 weeks, and radiographic imaging was used to visualize the intervertebral space and compare it before and after treatment. Results: Manual traction with a belt increased the lumbar intervertebral space at L4~L5 and L5~S1 in patients with L4~L5 HIVD. A significant difference was observed in the L4-L5 distance (p<.01); however, no significant difference was observed in the L5~S1 distance (p>.05). The intervertebral space significantly increased at both L4~L5 and L5~S1 in patients with L5~S1 HIVD (p<.05). Conclusion: Thus, manual traction with a belt increased the intervertebral space in patients with L4~L5 and L5~S1 HIVDs. These results are expected to guide studies on manual traction with belts in clinical settings in the future. Further studies using the present research as an objective study method are anticipated.

• The Journal of the Korea Contents Association
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• v.19 no.9
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• pp.567-581
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• 2019

Service-Learning (S-L) is an experiential learning-based teaching-learning method that connects students with curriculum and school-based community service and raises students' academic ability and social responsibility awareness through the value of 'reflection' and 'reciprocity'. This study analyzed the case of S-L course of 'History of Science and Inquire Activity' for pre-service science teachers (PSTs). The S-L lectures linked to the subjects of the History of Science were conducted in terms of three stages (Preparation-Implementation-Evaluation), and S-L classes were conducted in three schools five times. The educational effects of S-L lectures were analyzed by collecting questionnaires, class observation and self-reported reflection diary. The PSTs were able to understand the school realities and improve the teaching abilities and pedagogic content knowledge through educational service activities. The PSTs who participated in the S-L course had hard time due to excessive learning time, the difficulty of preparing the class, the fear of the class, and trial and error. Nonetheless, most of the students responded that they were very satisfied (4.68) with the S-L lecture, and that they could develop self-efficacy for their future teaching career thank to this learning experience.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.1137-1141
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• 2004

본 연구에서는 Probability Weighted Moments의 새로운 선형조합기법인 LQ-moments를 이용하여 GEV 분포의 매개변수를 추정하고 L, LH, LQ-moments를 사용하여 뉴욕주의 Donnattsburg에 위치한 Independence River의 홍수량을 빈도 해석하였다. LH, LQ-moments가 제시된 근본적인 이유는 L-moments가 극치값에 내해 지나치게 민감한 단점을 보완하기 위해서인데, 이번 연구의 결과에 의하면 오히려 LH, LQ-moments가 극치값에 대해 민감하게 반응하여 부정확한 결과가 도출되었다. 그러므로 항상 LH, LQ-moments가 L-moments의 대안이 될 수 있는 것은 아님을 알게 되었다. 그리고 수학적 유도에서 L, LH, LQ-moments는 좀더 쉽고 간편한 메개변수 추정을 위해 Probability Weighted Moments의 선형조합을 통해 고안되었다는 공통점을 가지고 있지만, 이 점을 제외한 나머지 부분의 수식 유도에서는 서로 많은 차이가 있어서 지역적인 특성과 확률분포형의 특성을 고려하여 L, LH, LQ-moments 중에서 선별 사용해야 할 것이다.