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응고제가 우유두부의 물성 및 관능적 특성에 미치는 영향
우나리야,이민선,박수진,강명화 동아시아식생활학회 2004 동아시아식생활학회지 Vol.14 No.5
Different types of coagulant and characteristics of its concentration added in the process of making milk curd were compared in this study. The pH of whey decreased when the amount of coagulant increased. The turbidity of whey was decreased when 5% of acetic acid and lemon juice were put into as coagulants. The texture of milk curd made with cow's milk and skim milk was measured the highest when acetic acid and lemon juice were added at 3, 5% of their concentration. The fracturability of milk curd made only with cow's milk decreased as the concentration of each coagulant increased. The cohesiveness was decreased as concentration of coagulant increased. The springiness was slightly changed depending on its coagulant but didn't show much of difference. The gummminess of milk curd made with cow's milk was increased when 3, 5% of coagulant was added. The result of sensory evaluation of milk curd showed that preference of milk curd wasn't depending on types of milk nor its coagulant. Also, flavor preference showed better when lemon juice was added. Preference in texture of milk curd was the highest made with cow's milk and skim milk. Preference in taste was high when 10% of lemon juice was added to skim milk and preference in its appearance showed higher when the alum was added as a coagulant to both cow's milk and skim milk than other coagulants.
Pseudomonas fluorescens의 Salicylate hydroxylase를 암호하는 유전자의 클로닝
정유선,민경희,이나리 숙명여자대학교 자연과학연구소 1997 자연과학논문집 Vol.- No.8
Pseudomonas fluorescens SME11로 부터 salicylate hydroxylase를 암호하는 nahG 유전자를 클로닝하기 위하여 NAH플라스미드를 주형으로 하여 PCR을 수행하였다. PCR방법으로 얻은 1.6kb DNA절편을 pT7Blue(R)벡터에 삽입시켜 재조합 플라스미드 pNY1을 제조하였으며 이것을 E. coli에 형질전환하였다. 재조합 DNA를 제한효소로 처리하여 EcoRⅤ, KpnⅠ, PvuⅡ, StuⅠ등이 존재함을 확인하였으며, 이것으로 간단한 제한효소지도를 작성하였고 재조합 DNA를 한 방향으로 deletion하여, nahG유전자를 포함한 DNA절편의 염기서열을 결정하였다. 재조합 플라스미드인 pNY1에는 1,305bp크기의 open reading frame이 존재하였으며, salicylate hydroxylase에 해당하는 434개의 아미노산을 암호하였다. 아미노산서열을 비교한 결과, P.putida KF715와 84.1%, P.putida PpG7과 71.4%, P.putida S-1 과 48.7%의 homology를 보였으며, 또한 Sphingmonas sp.와 26.8%의 homology를 보였다. Pseudomonas fluorescens SME11 carrying NAH plasmid was isolated from wastewater. To clone nahG gene encoding salicylate hydroxylase, 1.6kb DNA fragment of PCR product from NAH plasmid was inserted to pT7Blue(R) vertor and resulting recombinant DNA was named pNY1. The transformants, E.coli SMY1, clone containing the recombinant plasmid pNY1 were able to convert salicylate to catechol and produced dark brown color caused by accumulation and auto-oxidation of catechol. Restriction endonuclease mapping of 1.6kb size of the insert of the recombinant plasmid pNY1 was carried out with EcoRⅤ, KpnⅠ, PvuⅡ, StuⅠ. By means of unidirectional ExoⅢ deletion and dideoxynucleotide chain termination, we determined the nucleotide sequence of the DNA fragment containing nahG gene. One open reading frame of 1,305 bp corresponding to 434 amino acids was found in the insert DNA. Deduced amino acid sequences of the nahG gene showed 84.1%, 71.4%, 48.7%, and 26.8% homologies to those from P.putida KF715, P. putida PpG7, P. putida S-1, and Sphingmonas sp., respectively.
Lee, Jae-Yun,Kang, Woorim,Kim, Pil Soo,Lee, So-Yeon,Shin, Na-Ri,Sung, Hojun,Lee, June-Young,Yun, Ji-Hyun,Jeong, Yun-Seok,Han, Jeong Eun,Jung, Mi-Ja,Hyun, Dong-Wook,Kim, Hyun Sik,Tak, Euon Jung,Kang, M Society for General Microbiology 2019 International journal of systematic and evolutiona Vol.69 No.9
<P> A novel Gram-stain-negative, facultatively anaerobic, non-motile, non-violet-pigmented, rod-shaped bacterium, designated strain H11R3<SUP>T</SUP>, was isolated from the feces of Oriental stork, <I>Ciconia boyciana</I>, collected from Seoul Grand Park Zoo, Republic of Korea. Phylogenetic analysis of the 16S rRNA gene sequence revealed that H11R3<SUP>T</SUP> formed a monophyletic clade with <I>Iodobacter fluviatilis</I> DSM 3764<SUP>T</SUP>, <I>Iodobacter arcticus</I> DSM 100243<SUP>T</SUP>, and <I>Iodobacter limnosediminis</I> DSM 103822<SUP>T</SUP>, with sequence similarities of 98.8, 98.6 and 98.4%, respectively. H11R3<SUP>T</SUP> grew optimally at 15 ℃, pH 8, with 0.5% (w/v) NaCl. The predominant isoprenoid quinone was ubiquinone-8 (Q-8), and polar lipids included phosphatidylethanolamine, three unidentified lipids, four unidentified phospholipids, and two unidentified aminophospholipids. The major fatty acids were summed feature 3 and C<SUB>16 : 0</SUB>, and the DNA G+Ccontent of the genome is 48.0mol%. The average nucleotide identity (ANI) value between strains H11R3<SUP>T</SUP> and <I>I. fluviatilis</I> NCTC 11159<SUP>T</SUP> (=DSM 3764T) is 83.7%. On the basis of phenotypic, genotypic, phylogenetic and chemotaxonomic characteristics, strain H11R3<SUP>T</SUP> represents a novel species of the genus <I>Iodobacter</I> for which the name <I>Iodobacter ciconiae</I> sp. nov. is proposed. The type strain is H11R3<SUP>T</SUP> (=KCTC 62666<SUP>T</SUP>=JCM 33283<SUP>T</SUP>). </P>
Co-electrodeposition of U and Mo from a LiCl-KCl melt
Lee, Na-Ri,Kang, Byungman,Choi, Suhee,Bae, Sang-Eun,Park, Tae-Hong,Kim, Jong-Yun,Kim, Jongwon ELSEVIER 2018 JOURNAL OF NUCLEAR MATERIALS Vol.499 No.-
<P><B>Abstract</B></P> <P>Co-electrodeposition of uranium and molybdenum from a LiCl-KCl melt was investigated using cyclic voltammetry (CV), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The electrochemical study showed that the electrodeposition of Mo occurred from a molten LiCl-KCl eutectic at potentials more negative than −0.3 V vs. Ag|Ag<SUP>+</SUP>. Electrodeposition at a low overpotential range (between −0.3 V and −0.35 V) resulted in flat, thin Mo films, whereas greater overpotentials led to the growth of 3D films. Conditions for simultaneous electrodeposition of U and Mo were then optimized by varying the concentrations of UCl<SUB>3</SUB> and MoCl<SUB>3</SUB> and the electrodeposition method applied. At a constant potential of −1.58 V, a melt containing 1.3 wt% UCl<SUB>3</SUB> and 1.5 wt% MoCl<SUB>3</SUB> resulted in the co-electrodeposition of dendrites due to the high overpotential for Mo electrodeposition. However, diffusion-controlled electrodeposition using the same potential and concentration resulted in a uniform and flat U-Mo film. This co-electrodeposition of U-Mo films could be applied to the preparation of low-cost U-Mo nuclear fuel.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Co-electrodeposition of U and Mo from a LiCl-KCl melt was investigated. </LI> <LI> First individual deposition of U and Mo was studied, followed by co-deposition. </LI> <LI> Using a constant potential resulted in dendrite formation from the melt. </LI> <LI> Diffusion-controlled deposition resulted in a flat, uniform U-Mo film. </LI> </UL> </P>
<i>Undibacterium piscinae</i> sp. nov., isolated from Korean shiner intestine
Lee, So-Yeon,Kang, Woorim,Kim, Pil Soo,Kim, Hyun Sik,Sung, Hojun,Shin, Na-Ri,Whon, Tae Woong,Yun, Ji-Hyun,Lee, Jae-Yun,Lee, June-Young,Jung, Mi-Ja,Jeong, Yun-Seok,Tak, Euon Jung,Han, Jeong Eun,Hyun, D Society for General Microbiology 2019 International journal of systematic and evolutiona Vol.69 No.10
<P> A novel Gram-stain-negative, non-spore-forming, obligate aerobic, motile, rod-shaped, and flagellated bacterium, designated S11R28<SUP>T</SUP>, was isolated from the intestinal tract of a Korean shiner, <I>Coreoleuciscus splendidus</I>. Based on 16S rRNA gene sequences, strain S11R28<SUP>T</SUP> was identified as member of the genus <I>Undibacterium</I> in class <I>Betaproteobacteria,</I> and was closely related to <I>Undibacterium parvum</I> DSM 23061<SUP>T</SUP> (98.49%). The isolate grew at 4-25℃, pH 6-9, with 0% (w/v) NaCl, and grew optimally at 20℃, pH 8, in the absence of NaCl. The main cellular fatty acids were C<SUB>16 : 0</SUB> and summed features 3 (C<SUB>16 : 1</SUB>ω7c and/or C<SUB>16 : 1</SUB>ω6c). The strain possessed diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine as predominant polar lipids, and ubiquinone Q-8 as a respiratory quinone. The polyamine profile composed of 2-hydroxyputrescine, spermidine, putrescine, and benzoic acid. A genomic DNA G+Ccontent was 51.4mol%. The average nucleotide identity between strains S11R28<SUP>T</SUP> and U. parvum DSM 23061<SUP>T</SUP> was 78.66%. Thus, <I>Undibacterium piscinae</I> can be considered a novel species within the genus <I>Undibacterium</I> with the type strain S11R28<SUP>T</SUP> (=KCTC 62668<SUP>T</SUP> =JCM 33224<SUP>T</SUP>). </P>
Lee, Na-Ri,Lee, Sang-Mee,Cho, Kwang-Sik,Jeong, Seong-Yun,Hwang, Dae-Youn,Kim, Dong-Seob,Hong, Chang-Oh,Son, Hong-Joo Humana Press 2014 Applied biochemistry and biotechnology Vol.173 No.4
<P>The objectives of this study was to improve poly-γ-glutamic acid (γ-PGA) production by Bacillus subtilis D7 isolated from a Korean traditional fermented food and to assess its antioxidant activity for applications in the cosmetics and pharmaceutical industries. Strain D7 produced γ-PGA in the absence of L-glutamic acid, indicating L-glutamic acid-independent production. However, the addition of L-glutamic acid increased γ-PGA production. Several tricarboxylic acid cycle intermediates and amino acids could serve as the metabolic precursors for γ-PGA production, and the addition of pyruvic acid and D-glutamic acid to culture medium improved the yield of γ-PGA markedly. The maximum yield of γ-PGA obtained was 24.93??0.64?g/l in improved medium, which was about 5.4-fold higher than the yield obtained in basal medium. γ-PGA was found to have 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity (46.8??1.5?%), hydroxyl radical scavenging activity (52.0??1.8?%), 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonate (ABTS) radical scavenging activity (42.1??1.8?%), nitric oxide scavenging activity (35.1??1.3?%), reducing power (0.304??0.008), and metal chelating activity (91.3??3.5?%). These results indicate that γ-PGA has a potential use in the food, cosmetics, and biomedical industries for the development of novel products with radical scavenging activity. As far as we are aware, this is the first report to describe the antioxidant activityof γ-PGA produced by bacteria.</P>
Lee, Na-Ri,Kim, Sun-Mi,Kim, Dae-Young Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.4
The catalytic enantioselective electrophilic fluorinations of active methine compounds promoted chiral palladium complexes have been developed. Treatment of $\beta$-keto phosphonates and $\beta$-ketoesters with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding $\alpha$-fluorinated adducts in high yields with excellent enantiomeric excesses (up to 99% ee). These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture.