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Cha, Ye Jin,Lee, Chae Ryeong,Kwon, Joon Young,Kang, Yue Jai Elsevier 2017 Fish & shellfish immunology Vol.68 No.-
<P><B>Abstract</B></P> <P>In this study, we investigated the immunostimulatory and protective effects of CpG motif oligonucleotides (CpG-ODNs) against <I>Edwardsiella tarda</I> infection in olive flounder (<I>Paralichthys olivaceus</I>). Groups of fish injected with CpG-ODNs (1585, 1668, and 2007) or PBS (control) showed varying mortality rates in response to challenge with <I>E. tarda</I>. The survival rates of fish treated with CpG-ODN 1668 and 2007, which belonged to the same class type B, were 45% and 60%, respectively, with CpG-ODN 2007 showing the highest survival rate. Further analysis showed that the respiratory burst and bactericidal activities induced by CpG-ODN 2007 were higher than those in the control group (induced by non-CpG-ODNs) or in the group of fish induced by CpG-ODN 1585, which belonged to class type A. Additionally, the respiratory burst activity induced by CpG-ODN 2007 was higher than that induced by CpG-ODN 1668, despite similar bactericidal activity titers. <I>In vivo</I> experiments showed that CpG-ODN 2007 stimulation resulted in higher survival rates than CpG-ODN 1668 stimulation, possibly owing to differences in respiratory burst activity. In summary, we demonstrated that differences in CpG-motif or class type altered respiratory burst and bactericidal activities, resulting in differences in survival rates against <I>E. tarda</I> challenge in the olive flounder. Therefore, it is necessary to use CpG-ODNs optimized against <I>E. tarda</I> infection in olive flounder, because different CpG motifs belonging to the same class type have different effects.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We analyzed the protective effects of CpG-ODNs against <I>E. tarda</I> in olive flounder. </LI> <LI> CpG-ODN 2007 yielded the highest survival rates following challenge with <I>E. tarda.</I> </LI> <LI> CpG-ODN 2007 induced the highest respiratory burst and bactericidal activities. </LI> <LI> These activities were altered by CpG-motif or class type differences. </LI> </UL> </P>
Gui-Yue Huang,Heng Bo Jiang,Jung-Yul Cha,Kwang-Mahn Kim,Chung-Ju Hwang 대한치과교정학회 2017 대한치과교정학회지 Vol.47 No.5
Objective: The purpose of this study was to examine the effect of commercially available fluoride-containing oral rinses on the corrosion behavior of titanium alloys, which are the main components of orthodontic miniscrews. Methods: Four commercially available oral rinses (solution A, pH 4.46/260 ppm fluoride; solution B, pH 4.41/178 ppm fluoride; solution C, pH 6.30/117 ppm fluoride; and solution D, pH 4.17/3.92 ppm fluoride) were tested on titanium alloy (Ti- 6Al-4V) circular plates, and saline was used as the control. The open-circuit potential and potentiodynamic polarization of these materials were measured. Thereafter, all samples were evaluated under a field-emission scanning electron microscope. Results: Among the tested oral rinses, except solution D, the more the fluoride content was, the greater was the corrosion potential downtrend; the corrosion resistance of the titanium alloy sample was also lowered significantly (p < 0.05). Field-emission scanning electron microscopic analysis of the surface morphology of the titanium alloy samples revealed that all samples had some defects, crevices, or pitting after exposure to the oral rinses than before treatment. In particular, the samples in solution A showed the most changes. Conclusions: Commercially available oral rinses having a high fluoride concentration and a low pH may reduce the corrosion resistance of titanium alloys used in dental appliances such as orthodontic titanium miniscrews and brackets.
Jun Zhou,Anyuan Fan,Cha Hyungki,Dong Liu,Dukhyeon Kim,Fudi Qi,Guangyu Shi,Guming Yue 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1
A Mie lidar has been used to make observations of Asian dust over Hefei (31.90 N, 117.16 E) in the every spring month since the year of 1998. This paper presents the main features of the vertical distribution and the temporal variation of the Asian dust extinction coefficient at a 532-nm wavelength during seven years. There were two kinds of vertical distributions of Asian dust extinction coefficients. One kind of distribution indicated that the Asian dust particles intruded into the local boundary layer, causing a very thick dust layer with depth of about 3 4 km. The other one showed that the Asian dust passed over Hefei area above the boundary layer. The aerosol extinction coefficients in the elevated dust layer within the middle troposphere from 3 to 6 km were unusually large. Seasonally averaged aerosol extinction coefficient profiles showed that larger aerosol extinction coefficients were observed in the altitude range from 1 km to 10 km in the springtime than in any other season.쯢
Tegafaw, Tirusew,Oh, In Taek,Cha, Hyunsil,Yue, Huan,Miao, Xu,Ho, Son Long,Ahmad, Mohammad Yaseen,Marasini, Shanti,Ghazanfari, Adibehalsadat,Kim, Hee-Kyung,Chae, Kwon Seok,Chang, Yongmin,Lee, Gang Ho Elsevier 2018 The Journal of physics and chemistry of solids Vol.120 No.-
<P><B>Abstract</B></P> <P>In this study, amorphous carbon nanoparticles (CNPs) with an average diameter of 2.2 nm were synthesized by reducing dextrose (C<SUB>6</SUB>H<SUB>12</SUB>O<SUB>6</SUB>) with sodium hydroxide in an aqueous medium. The amorphous CNPs formed stable colloidal suspensions in water owing to the presence of hydrophilic functional groups on the nanoparticle surfaces. The amorphous CNPs exhibited ultraviolet (UV)-visible absorption (λ<SUB>abs</SUB>) at 267 nm and emission (λ<SUB>em</SUB>) at 453 nm under UV irradiation; thus, the colloidal suspension appeared sky-blue in color under UV irradiation. The amorphous CNPs were paramagnetic with weak magnetization at room temperature and exhibited small longitudinal (r<SUB>1</SUB>) and transverse (r<SUB>2</SUB>) water proton relaxivities of 0.036 and 0.068 s<SUP>−1</SUP>mM<SUP>−1</SUP>, respectively. The amorphous CNPs exhibited no cellular toxicity up to the measured carbon concentration of 500 μM and presented fluorescence microscopy images on a micrometer scale, thus demonstrating their utility in fluorescence bio-imaging applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The amorphous CNPs with an average diameter of 2.2 nm were synthesized in an aqueous medium. </LI> <LI> The CNPs were non-toxic and formed stable colloidal suspensions in water. </LI> <LI> The CNPs were paramagnetic and exhibited weak magnetization at room temperature. </LI> <LI> The CNPs exhibited small water proton relaxivities. </LI> <LI> Fluorescence microscopy demonstrated the utility of the CNPs in fluorescence bio-imaging applications. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Characterization of proteolysis in muscle tissues of sea cucumber Stichopus japonicus
Chen-Chen Zhao,Yang Yang,Hai-tao Wu,Zhi-Mo Zhu,Yue Tang,Cui-Ping Yu,Na Sun,Qiang Lv,Jia-Run Han,Ao-Ting Li,Jia-Nan Yan,Yue Cha 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.6
The proteolysis in muscle tissues of sea cucumber Stichopus japonicus (sjMTs) was characterized. The proteins from sjMTs were primarily myosin heavy chains (MHCs), paramyosin (Pm), and actin (Ac) having a molecular mass of approximately 200, 98, and 42 kDa, respectively. Based on SDS-PAGE analysis and quantification of trichloroacetic acid (TCA)-soluble peptides released, degradation of muscle proteins from sjMTs was favorable at pH 5 and 50°C. Proteolysis of MHCs was mostly inhibited by cysteine protease inhibitors, including trans-epoxysuccinyl-L-leucyl-amido (4- guanidino) butane (E-64) and antipain (AP). E-64 and AP completely inhibited the degradation of Pm and Ac, while iodoacetic acid showed a partially inhibitory effect. These results indicated that the proteolysis of sjMTs was mainly attributed to cysteine proteases. Avoidance of setting the tissues at 40–50oC and slightly acidic condition and inhibition of cysteine proteases are helpful for decreasing sea cucumber autolysis.
Sphingomonas abietis sp. nov., an Endophytic Bacterium Isolated from Korean Fir
Jiang Lingmin,Choe Hanna,Peng Yuxin,Jeon Doeun,Cho Donghyun,Jiang Yue,Lee Ju Huck,Kim Cha Young,Lee Jiyoung 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.10
PAMB 00755T , a bacterial strain, was isolated from Korean fir leaves. The strain exhibits yellow colonies and consists of Gram-negative, non-motile, short rods or ovoid-shaped cells. It displays optimal growth conditions at 20°C, 0% NaCl, and pH 6.0. Results of 16S rRNA gene-based phylogenetic analyses showed that strain PAMB 00755T was most closely related to Sphingomonas chungangi MAH-6T (97.7%) and Sphingomonas polyaromaticivorans B2-7T (97.4%), and ≤96.5% sequence similarity to other members of the genus Sphingomonas. The values of average nucleotide identity (79.9–81.3%), average amino acid identity (73.3–75.9%), and digital DNA–DNA hybridization (73.3– 75.9%) were significantly lower than the threshold values for species boundaries; these overall genome-related indexes (OGRI) analyses indicated that the strain represents a novel species. Genomic analysis revealed that the strain has a 4.4-Mbp genome encoding 4,083 functional genes, while the DNA G+C content of the whole genome is 66.1%. The genome of strain PAMB 00755T showed a putative carotenoid biosynthetic cluster responsible for its antioxidant activity. The respiratory quinone was identified as ubiquinone 10 (Q-10), while the major fatty acids in the profile were identified as C18:1ω7c and/or C18:1ω6c (summed feature 8). The major polar lipids of strain PAMB 00755T were diphosphatidylglycerol, phosphatidylethanolamine, sphingoglycolipid, and phosphatidylcholine. Based on a comprehensive analysis of genomic, phenotypic, and chemotaxonomic characteristics, we proposed the name Sphingomonas abietis sp. nov. for this novel species, with PAMB 00755T as the type strain (= KCTC 92781T = GDMCC 1.3779T ).