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Li, Ling,Liu, Xiaoguang,Noh, Hyeon Mi,Moon, Byung Kee,Choi, Byung Chun,Jeong, Jung Hyun Elsevier 2015 Materials chemistry and physics Vol.158 No.-
<P><B>Abstract</B></P> <P>It has been still a challenge to obtain a new single-component white-light phosphor with the vanadates as host lattices and with two types of ions as activators. A systematic Ln<SUB>1</SUB> <SUP>3+</SUP>/Ln<SUB>2</SUB> <SUP>3+</SUP> (Ln<SUB>1</SUB> <SUP>3+</SUP>/Ln<SUB>2</SUB> <SUP>3+</SUP> = Dy<SUP>3+</SUP>/Tm<SUP>3+</SUP> or Dy<SUP>3+</SUP>/Sm<SUP>3+</SUP> or Dy<SUP>3+</SUP>/Eu<SUP>3+</SUP> or Tm<SUP>3+</SUP>/Eu<SUP>3+</SUP> or Tm<SUP>3+</SUP>/Sm<SUP>3+</SUP>) coactivated Ca<SUB>9</SUB>Y(VO<SUB>4</SUB>)<SUB>7</SUB> (CYV)samples as well as their singly doped CYV phosphors have been synthesized by the traditional solid state reaction and their photoluminescence properties have been investigated. The photoluminescence properties as a function of the concentration of rare earth ions have been discussed and the tunable luminescent color was found. The warm (CYV: 1%Dy<SUP>3+</SUP>, 1%Sm<SUP>3+</SUP>), natural (CYV: 7% Tm<SUP>3+</SUP>,0.5% Eu<SUP>3+</SUP>; CYV: 1.0% Tm<SUP>3+</SUP>, 0.5% Sm<SUP>3+</SUP>), and cold (CYV: 3% Tm<SUP>3+</SUP>,0.5% Eu<SUP>3+</SUP>; CYV: 0.5% Dy<SUP>3+</SUP>,0.5% Tm<SUP>3+</SUP>; CYV: 0.5% Dy<SUP>3+</SUP>,0.7% Tm<SUP>3+</SUP>; CYV: 0.3%Dy<SUP>3+</SUP>, 0.5% Tm<SUP>3+</SUP>) white lights can be obtained. Generally, the emission intensity or lifetime of one rare earth ions decreases with increasing of the concentration of another rare earth ions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Photoluminescence properties of rare earth ions coactivated Ca<SUB>9</SUB>Y(VO<SUB>4</SUB>)<SUB>7</SUB> were investigated. </LI> <LI> The effects of rare earth ions concentration on photoluminescence have been discussed. </LI> <LI> The tunable luminescent color was found. </LI> <LI> Cold, natural and warm white emissions were obtained. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Hamada, Tsuyoshi,Liu, Li,Nowak, Jonathan A.,Mima, Kosuke,Cao, Yin,Ng, Kimmie,Twombly, Tyler S.,Song, Mingyang,Jung, Seungyoun,Dou, Ruoxu,Masugi, Yohei,Kosumi, Keisuke,Shi, Yan,da Silva, Annacarolina,G Elsevier 2018 European journal of cancer Vol.103 No.-
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>High-level plasma 25-hydroxyvitamin D [25(OH)D] has been associated with lower colorectal cancer incidence and mortality. Considering evidence indicating immunomodulatory effects of vitamin D, we hypothesised that survival benefits from high systemic vitamin D level might be stronger for colorectal carcinoma with lower immune response to tumour.</P> <P><B>Methods</B></P> <P>Using 869 colon and rectal cancer cases within the Nurses' Health Study and Health Professionals Follow-up Study, we assessed the prognostic association of postdiagnosis 25(OH)D score [derived from diet and lifestyle variables to predict plasma 25(OH)D level] in strata of levels of histopathologic lymphocytic reaction. The Cox proportional hazards regression model was adjusted for potential confounders, including microsatellite instability, CpG island methylator phenotype, LINE-1 methylation, <I>PTGS2</I> (cyclooxygenase-2) expression and <I>KRAS</I>, <I>BRAF</I> and <I>PIK3CA</I> mutations.</P> <P><B>Results</B></P> <P>The association of postdiagnosis 25(OH)D score with colorectal cancer-specific mortality differed by levels of peritumoural lymphocytic reaction (<I>p</I> <SUB>interaction</SUB> = 0.001). Multivariable-adjusted mortality hazard ratios for a quintile-unit increase of 25(OH)D score were 0.69 [95% confidence interval (CI), 0.54–0.89] in cases with negative/low peritumoural lymphocytic reaction, 1.08 (95% CI, 0.93–1.26) in cases with intermediate peritumoural reaction and 1.25 (95% CI, 0.75–2.09) in cases with high peritumoural reaction. The survival association of the 25(OH)D score did not significantly differ by Crohn's-like lymphoid reaction, intratumoural periglandular reaction or tumour-infiltrating lymphocytes.</P> <P><B>Conclusions</B></P> <P>The association between the 25(OH)D score and colorectal cancer survival is stronger for carcinomas with lower peritumoural lymphocytic reaction. Our results suggesting interactive effects of vitamin D and immune response may contribute to personalised dietary and lifestyle intervention strategies.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The survival association of vitamin D is stronger in cancer with fewer lymphocytes. </LI> <LI> Vitamin D and peritumoural lymphocytes interact to modify cancer progression. </LI> <LI> Vitamin D may exert anti-tumour immune-enhancing effects. </LI> <LI> Peritumoural lymphocytic reaction may be a biomarker for benefits from vitamin D. </LI> <LI> Our data support immunomodulatory lifestyle interventions for cancer patients. </LI> </UL> </P>
Li, Ling,Wang, Wenjun,Pan, Yu,Liu, Xiaoguang,Noh, Hyeon Mi,Jeong, Jung Hyun ELSEVIER SCIENCE 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.723 No.-
<P><B>Abstract</B></P> <P>In air atmosphere, the spontaneous reduction abilities of Sm<SUP>3+</SUP>→Sm<SUP>2+</SUP> in Sm ions doped monoclinic SrAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (SASO) and BaAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (M-BASO) as well as hexagonal BaAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (H-BASO) are investigated. Sm ions doped MAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (M = Sr, Ba) samples were synthesized using Pechini-type sol-gel technology and sintered in air atmosphere and reducing condition, respectively. By comparing the photoluminescence properties of Sm doped MAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (M = Sr, Ba) calcined in air with that in reducing condition, the spontaneous reduction of Sm<SUP>3+</SUP>→Sm<SUP>2+</SUP> can be detected only in the host lattice H-BASO. The essential that makes the reduction of Sm<SUP>3+</SUP> to Sm<SUP>2+</SUP> was investigated by calculating their chemical bonds parameter quantitatively. The important key environmental factor of Ba<SUP>2+</SUP> in H-BASO is the largest among the three samples MAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB>. It indicates that the hexagonal H-BASO sample is the easiest one to realize the spontaneous reduction of Sm<SUP>3+</SUP>→Sm<SUP>2+</SUP> among Sm doped MAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB> (M = Sr, Ba) samples. The needed energy transferring one electron of the ligand to the central ions Sm<SUP>3+</SUP> in H-BASO:Sm is the lowest. The theoretical analysis agrees well with the experimental result. Our work provides with the theoretical and experimental foundation for the spontaneous reduction of trivalent samarium in the crystals.</P> <P><B>Highlights</B></P> <P> <UL> <LI> In air atmosphere, the PL properties of Sm<SUP>3+</SUP> in MAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB>:Sm are investigated. </LI> <LI> The abnormal Sm<SUP>3+</SUP>→Sm<SUP>2+</SUP> reduction can be detected only in the hexagonal BaAl<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>8</SUB>. </LI> <LI> The reduction essential was determined by calculating the chemical bond parameters. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
An operando surface enhanced Raman spectroscopy (SERS) study of carbon deposition on SOFC anodes.
Li, Xiaxi,Liu, Mingfei,Lee, Jung-pil,Ding, Dong,Bottomley, Lawrence A,Park, Soojin,Liu, Meilin Royal Society of Chemistry 2015 Physical chemistry chemical physics Vol.17 No.33
<P>Thermally robust and chemically inert Ag@SiO2 nanoprobes are employed to provide the surface enhanced Raman scattering (SERS) effect for an in situ/operando study of the early stage of carbon deposition on nickel-based solid oxide fuel cell (SOFC) anodes. The enhanced sensitivity to carbon enables the detection of different stages of coking, offering insights into intrinsic coking tolerance of material surfaces. Application of a thin coating of gadolinium doped ceria (GDC) enhances the resistance to coking of nickel surfaces. The electrochemically active Ni-YSZ interface appears to be more active for hydrocarbon reforming, resulting in the accumulation of different hydrocarbon molecules, which can be readily removed upon the application of an anodic current. Operando SERS is a powerful tool for the mechanistic study of coking in SOFC systems. It is also applicable to the study of other catalytic and electrochemical processes in a wide range of conditions.</P>
Li, Ling,Noh, Hyeon Mi,Liu, Xiaoguang,Moon, Byung Kee,Choi, Byung Chun,Jeong, Jung Hyun American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.7
<P>Well-crystallized nanorod bundles Ln(4)O(OH)(9)NO3:1%Eu(Ln = Y, Lu) have been successfully prepared by hydrothermal method. The crystalline phase, size and optical properties were characterized using powder X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), infrared (IR) spectrograph and photoluminescent (PL) spectra. Site occupations of Eu3+ in crystals Ln(4)O(OH)(9)NO3:Eu(Ln = Y, Lu) were discussed based on excitation spectra and the empirical relationship formula between the charge transfer (CT) energy and the environmental factor. The emission spectra exhibited that the strongest emission peaks with an excitation wavelength of 395 nm were at 617 and 626 nm in crystal Lu4O(OH)(9)NO3:1%Eu and Y4O(OH)(9)NO3:1%Eu, respectively, both of which come from D-5(0)-F-7(2) transition of the Eu3+ ions. The broad excitation peaks at about 254 and 255 nm were found when monitored at 617 and 628 nm in crystal Lu4O(OH)(9)NO3:1%Eu and Y4O(OH)(9)NO3:1%Eu, respectively, which were due to 0 Eu CT transition. Based on the dielectric theory of complex crystal, the CT bands at about 254 and 255 nm in Ln(4)O(OH)(9)NO3:1%Eu(Ln = Y, Lu) were assigned to the transition of 0 Eu at Ln3(Ln = Y, Lu) site, from which we can conclude that Eu3+ ions occupied the site of Ln3(Ln = Y, Lu) in crystal Ln(4)O(OH)(9)NO3:1%Eu(Ln = Y, Lu). It put forward a new route to investigate site occupation of luminescent center ions in rare earth doped complex inorganic luminescence materials.</P>
Antibacterial Polyketides from the Jellyfish-Derived Fungus <i>Paecilomyces variotii</i>
Liu, Juan,Li, Famei,Kim, Eun La,Li, Jian Lin,Hong, Jongki,Bae, Kyung Sook,Chung, Hae Young,Kim, Hyung Sik,Jung, Jee H. American Chemical Society and American Society of 2011 Journal of natural products Vol.74 No.8
<P>Four new polyketides (<B>1</B>–<B>4</B>) were isolated from the fungus <I>Paecilomyces variotii</I>, which was derived from the jellyfish <I>Nemopilema nomurai</I>. The planar structures and relative configurations of these polyketides were elucidated on the basis of spectroscopic analyses, including 2D NMR experiments. The compounds showed inhibitory activity against pathogenic bacteria including methicillin-resistant <I>Staphylococcus aureus</I> 3089 and multi-drug-resistant <I>Vibrio parahemolyticus</I> 7001 with MIC values in the range 5–40 μg/mL.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jnprdf/2011/jnprdf.2011.74.issue-8/np200350b/production/images/medium/np-2011-00350b_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/np200350b'>ACS Electronic Supporting Info</A></P>
Aurantisolimonas haloimpatiens gen. nov., sp. nov., a bacterium isolated from soil
Liu, Min-Jiao,Jin, Chun-Zhi,Asem, Mipeshwaree Devi,Ju, Yoon-Jung,Park, Dong-Jin,Salam, Nimaichand,Xiao, Min,Li, Wen-Jun,Kim, Chang-Jin Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.5