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( Jiao Wen Shen ),임윤희 ( Yun Hui Lim ),조영민 ( Young Min Jo ) 한국공업화학회 2011 공업화학 Vol.22 No.2
본 연구에서는 화학적 공침법을 적용하여 가스상 이산화탄소 분해를 위한 나노크기의 M-페라이트(M=Co, Ni, Cu, Zn)를 제조하였다. 열중량 분석 결과, 시험제조한 모든 시료의 최고 무게 감소율은 350 ℃ 미만에서 발생하였다. 소성온도가 증가할수록 결정형은 우수하여 표면촉매활성화를 기대할 수 있지만, 입자결정의 크기가 크고, 비표면적이 낮은 페라이트가 합성됨을 알 수 있었다. FT-IR 분석으로부터 375~406 cm-1의 범위에서 octahedral site에 착화물이 존재함을 확인 할 수 있었으며, 이는 페라이트 내 스피넬 구조가 형성되어 있음을 보여주는 것이라고 믿는다. 본 연구로부터 얻은 이산화탄소 분해반응을 위한 금속페라이트의 최적 열처리 온도는 500 ℃인 것으로 나타났다. In this work, nano-sized M-ferrites (M=Co, Ni, Cu, Zn) for the decomposition of carbon dioxide were synthesized by the chemical co-precipitation. From the thermogravimetric analysis, it was clear that the maximum weight loss of each sample took place below 350 ℃. High temperature calcination resulted in more systematic crystallines, smaller specific surface area and larger particle size. An analysis by FTIR in the range of 375~406 cm-1 revealed the presence of chelates at the octahedral site, which implies the formation of spinel structure in the ferrites. The current work showed that a 500 ℃ is the optimum heat treatment temperature of metal ferrites for CO2 decomposition reaction.
Core–shell structured mesoporous magnetic nanoparticles and their magnetorheological response
Han, Wen Jiao,Piao, Shang Hao,Choi, Hyoung Jin,Seo, Yongsok Elsevier 2017 Colloids and surfaces. A, Physicochemical and engi Vol.524 No.-
<P><B>Abstract</B></P> <P>As a new magneto-responsive smart material, core–shell structured mesoporous Fe<SUB>3</SUB>O<SUB>4</SUB>@mSiO<SUB>2</SUB> nanoparticles were fabricated by a surfactant-based sol–gel approach using Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles, and then adopted as magnetorheological (MR) materials. The Fe<SUB>3</SUB>O<SUB>4</SUB> particles were initially synthesized by a solvo-thermal process. Scanning electron microscopy and transmission electron microscopy were employed to observe the morphology of the as-synthesized mesoporous silica-coated Fe<SUB>3</SUB>O<SUB>4</SUB> particles. Fourier transform infrared spectroscopy and X-ray diffraction results showed that the mesoporous silica shell is successfully coated on the Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles. BET adsorption measurement also confirmed their mesopore formation. Rheological properties of the silica-coated Fe<SUB>3</SUB>O<SUB>4</SUB>-based MR fluid dispersed in silicone oil were investigated, and a change in the slope of the yield stress as a function of magnetic field strength from 2.0 to 1.5 was observed, with improved dispersion stability.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Core–shell structured mesoporous Fe<SUB>3</SUB>O<SUB>4</SUB>@mSiO<SUB>2</SUB> nanoparticles were fabricated. </LI> <LI> Both dynamic and elastic yield stresses of MR fluids were well correlated with universal yield stress equation. </LI> <LI> Dispersion stability of MR fluid was improved compared to the sedimentation rate of Fe<SUB>3</SUB>O<SUB>4</SUB>-based MR fluid. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Actinorugispora endophytica gen. nov., sp. nov., an actinomycete isolated from Daucus carota.
Liu, Min-Jiao,Zhu, Wen-Yong,Li, Jie,Zhao, Guo-Zhen,Xiong, Zhi,Park, Dong-Jin,Hozzein, Wael N,Kim, Chang-Jin,Li, Wen-Jun Society for General Microbiology 2015 International journal of systematic and evolutiona Vol.65 No.8
<P>An actinomycete strain, designated YIM 690008T, was isolated from Daucus carota collected from South Korea and its taxonomic position was investigated by using a polyphasic approach. The strain grew well on most media tested and no diffusible pigment was produced. The aerial mycelium formed wrinkled single spores and short spore chains, some of which were branched. The whole-cell hydrolysates contained meso-diaminopimelic acid, glucose, mannose, ribose, galactose and rhamnose. The predominant menaquinones were MK-10(H4), MK-10(H6), MK-10(H8) and MK-10(H2). The polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylinositol, phosphatidylinositol mannosides, some unknown phospholipids, glycolipids and polar lipids. The major fatty acids were i-C16?:?0, ai-C17?:?0 and C18?:?1ω9c. The DNA G+C content of the genomic DNA was 63.1?mol%. Phylogenetic analysis indicated that the isolate belongs to the family Nocardiopsaceae. However, based on phenotypic, chemotaxonomic and genotypic data, it was concluded that strain YIM 690008T represents a novel genus and novel species of the family Nocardiopsaceae, for which the name Actinorugispora endophytica gen. nov., sp. nov. (type strain YIM 690008T?=?DSM 46770T?=?JCM 30099T?=?KCTC 29480T) is proposed.</P>
Ke-Long Jiao,Xiao-Yi Zhou,Hai-Li Qiao,Hao Wang,Jun Chen,Bai-Ming Liu,Wen-Jun Bu,Peter Kolesik 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.4
Larvae of a previously undescribed gall midge species have been feeding within malformed flower buds of goji berry Lycium barbarum L. (Solanaceae) in China, preventing fruit development and causing damage to the fruit industry. The new species is named Gephyraulus lycantha Jiao & Kolesik, its morphology is described, the COI mitochondrial gene segment is sequenced, and the biology is outlined. In order to taxonomically accommodate the new gall midge, the scope of the genus Gephyraulus is broadened and now encompasses also species that lack dorso-apical sensoria on the female cercus.
( Zhou Yang Jiao ),( Jing Wu ),( Chao Liu ),( Bing Wen ),( Wen Zeng Zhao ),( Xin Ling Du ) 생화학분자생물학회(구 한국생화학분자생물학회) 2014 BMB Reports Vol.47 No.10
The main purpose of this study was to investigate whether type 3 muscarinic acetylcholine receptor (M3R) dysfunction induced vascular hyperpermeability. Transwell system analysis showed that M3R inhibition by selective antagonist 4-diphenylacetoxy-N-methylpiperidine methiodide (4-DAMP) and small interfering RNA both increased endothelial permeability. Using coimmunoprecipitation and Western blot assay, we found that M3R inhibition increased VE-cadherin and β-catenin tyrosine phosphorylation without affecting their expression. Using PTP1B siRNA, we found that PTP1B was required for maintaining VE-cadherin and β-catenin protein dephosphorylation. In addition, 4-DAMP suppressed PTP1B activity by reducing cyclic adenosine monophosphate (cAMP), but not protein kinase C (PKCa). These data indicate that M3R preserves the endothelial barrier function through a mechanism potentially maintaining PTP1B activity, keeping the adherens junction proteins (AJPs) dephosphorylation.
Streptomyces xinghaiensis sp. nov., isolated from marine sediment.
Zhao, Xin-Qing,Li, Wen-Jun,Jiao, Wen-Ce,Li, Yan,Yuan, Wen-Jie,Zhang, Yu-Qin,Klenk, Hans-Peter,Suh, Joo-Won,Bai, Feng-Wu Society for General Microbiology 2009 International journal of systematic and evolutiona Vol.59 No.11
<P>A novel actinomycete, strain S187(T), was isolated from a marine sediment sample collected from Xinghai Bay, Dalian, China. Growth occurred on ISP medium 2 containing 0-9 % NaCl and at pH 6.0-9.0 and 10-45 degrees C. The cell wall of strain S187(T) contained the isomer ll-diaminopimelic acid as the diagnostic diamino acid. The predominant menaquinones were MK-9(H(6)) (40.8 %), MK-9(H(8)) (38.2 %) and MK-9(H(2)) (8.8 %). The major fatty acids were iso-C(16 : 0) (29.6 %), anteiso-C(15 : 0) (14.0 %) and anteiso-C(17 : 0) (11.6 %). Cells contained phosphatidylethanolamine, phosphatidylinositol, phosphatidylglycerol, phosphatidylinositol mannosides and one unknown phospholipid. The G+C content of the genomic DNA was 72.01 mol%. The 16S rRNA gene sequence of the isolate had similarities of 98.1 and 97.5 % with those of Streptomyces flavofuscus NRRL B-8036(T) (=DSM 41426(T)) and Streptomyces albiaxialis DSM 41799(T), respectively, showing that the novel strain should be assigned to the genus Streptomyces. DNA-DNA hybridizations with the two above-mentioned Streptomyces species showed 31.4 and 46.9 % relatedness, respectively. Moreover, the three strains differed in some physiological and biochemical properties. Thus, on the basis of phenotypic and genotypic analyses, it is proposed that strain S187(T) represents a novel species of the genus Streptomyces, for which the name Streptomyces xinghaiensis sp. nov. is proposed; the type strain is S187(T) (=NRRL B-24674(T)=CCTCC AA 208049(T)=KCTC 19546(T)).</P>
Jiao, Xiao-Li,Jing, Jiong-Jie,Qiao, Li-Ying,Liu, Jian-Hua,Li, Liu-An,Zhang, Jing,Jia, Xia-Li,Liu, Wen-Zhong Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.3
Lipins play dual function in lipid metabolism by serving as phosphatidate phosphatase and transcriptional co-regulators of gene expression. Mammalian lipin proteins consist of lipin1, lipin2, and lipin3 and are encoded by their respective genes Lpin1, Lpin2, and Lpin3. To date, most studies are concerned with Lpin1, only a few have addressed Lpin2 and Lpin3. Ontogenetic expression of Lpin2 and Lpin3 and their associations with traits would help to explore their molecular and physiological functions in sheep. In this study, 48 animals with an equal number of males and females each for both breeds of fat-tailed sheep such as Guangling Large Tailed (GLT) and Small Tailed Han (STH) were chosen to evaluate the ontogenetic expression of Lpin2 and Lpin3 from eight different tissues and months of age by quantitative real-time polymerase chain reaction (PCR). Associations between gene expression and slaughter and tail traits were also analyzed. The results showed that Lpin2 mRNA was highly expressed in perirenal and tail fats, and was also substantially expressed in liver, kidney, reproductive organs (testis and ovary), with the lowest levels in small intestine and femoral biceps. Lpin3 mRNA was prominently expressed in liver and small intestine, and was also expressed at high levels in kidney, perirenal and tail fats as well as reproductive organs (testis and ovary), with the lowest level in femoral biceps. Global expression of Lpin2 and Lpin3 in GLT both were significantly higher than those in STH. Spatiotemporal expression showed that the highest levels of Lpin2 expression occurred at 10 months of age in two breeds of sheep, with the lowest expression at 2 months of age in STH and at 8 months of age in GLT. The greatest levels of Lpin3 expression occurred at 4 months of age in STH and at 10 months of age in GLT, with the lowest expression at 12 months of age in STH and at 8 months of age in GLT. Breed and age significantly influenced the tissue expression patterns of Lpin2 and Lpin3, respectively, and sex significantly influenced the spatiotemporal expression patterns of Lpin3. Meanwhile, Lpin2 and Lpin3 mRNA expression both showed significant correlations with slaughter and tail traits, and the associations appear to be related with the ontogenetic expression as well as the potential functions of lipin2 and lipin3 in sheep.