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IL28B polymorphism as a predictor of antiviral response in chronic hepatitis C

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World Journal of Gastroenterology 2012年第35期18卷 4892-4897页

作者： Andrzej cie.la Monika Bociaga-Jasik Iwona Sobczyk-Krupiarz Mikolaj K Glowacki Danuta Owczarek Dorota Cibor Marek Sanak Tomasz Mach Department of Gastroenterology Hepatology and Infectious DiseasesJagiellonian University Medical College Department of Molecular Biology and Clinical Genetics II Department of Internal MedicineJagiellonian University Medical College

AIM： To evaluate the effect of single nucleotide poly- morphisms of interleukin （IL）-28B, rs12979860 on progression and treatment response in chronic hepatitis C. METhODS： Patients （n = 64; 37 men, 27 women; mean age, 44 ＋ 12 years） with chronic hepatitis C, genotype 1, received treatment with peg-interferon plus ribavirin. Genotyping of rs12979860 was per- formed on peripheral blood DNA. histopathological assessment of necroinflammatory grade and fibrosis stage were scored using the METAVIR system on a liver biopsy sample before treatment. Serum viral load, ami- notransferase activity, and insulin level were measured. Insulin resistance index, body mass index, waist/hip ratio, percentage of body fat and fibrosis progression rate were calculated. Applied dose of interferon and ribavirin, platelet and neutrophil count and hemoglobin level were measured. RESULTS： A sustained virological response （SVR） was significantly associated with IL28B polymorphism （CC vs -l-r allele： odds ratio （OR）, 25; CC vs CT allele： OR, 5.4）, inflammation activity （G 〈 1 vs G 〉 1： OR, 3.9）, fibrosis （F 〈 1 vs F 〉 1： OR, 5.9）, platelet count （〉 200 × 109/L vs 〈 200 ×109/L： OR, 4.7; OR in patients with genotype CT： 12.8）, fatty liver （absence vs presence of steatosis： OR, 4.8）, insulin resistance index （〈 2.5 vs 〉 2.5： OR, 3.9）, and baseline hCV viral load （〈 106 IU/mL vs 〉 106 IU/mL： OR, 3.0）. There was no association with age, sex, aminotransferases activity, body mass index, waist/hip ratio, or percentage body fat. There was borderline significance （P = 0.064） of increased fibrosis in patients with the I-I allele, and no differences in the insulin resistance index between groups of patients with CC, CT and -IF alleles （P = 0.12）. Spearman＇s rank correlation coefficie.t between insulin resistance and stage of fibrosis and body mass index was r = 0.618 and r = 0.605, respectively （P 〈 0.001）. Significant dif- ferences were found in the insulin resistance index （P = 0.01） between patients wit

关键词： IL28B polymorphism hepatitis C Fibrosis Progression Peg-interferon alpha Sustained viral re-sponse

Structural and photoluminescence properties of La3+ doped CdO nanophosphors synthesised via green mediated solution combustion route

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Journal of Rare Earths 2019年第9期37卷 916-923,I0001页

作者： M.S. Geetha h.N. Shivananjaiah Vijaya Composite College Bangalore560 003India Government Scie.ce College Nrupatunga RoadBangalore 560 001India

This paper reports a facile environmentally safe green combustion synthesis method of La3+doped CdO nanoparticles(NPs)using different concentrations of Aloe vera(A.V)gel as combustible *** crystallite size obtained using PXRD pattern is found to be 12-22 *** structural analysis was further analysed by Rietveld refinement *** X-ray photoelectron spectroscopy(XPS)analysis reveals the presence of two electronic states of CdO around 400 and 411 eV attributed to Cd 3 d3/2 and 3 d3/2,*** photoluminescence(PL)studies were carried upon 350 nm excitation *** PL emission spectra are found to have two prominent peaks centered at 410 and 510 nm and are attributed to 5D3→7F1 and 5D1→7F0 transitions,*** Commission International de l’Eclairage(cie.chromaticity diagram reveals blue-green color *** correlation color temperature(CCT)value is found to be around^9793 *** obtained results suggest that the product is quite useful for cool light emitting diode applications when doping concentration is 2 mol%.

关键词： Green synthesis Nanostructures Photoluminescence Judd-ofelt Rare earths CdO

Low-temperature green synthesis of boron carbide using aloe vera

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Chinese Physics B 2018年第10期27卷 578-583页

作者： h V SarithaDevi M S Swapna G Ambadas S Sankararaman Department of Optoelectronics and Department of Nanoscie.ce and Nanotechnology University of Kerala Kariavattom Thiruvananthapuram-695581 Kerala India Government Victoria College Palakkad Kerala India

The unique structural and physical properties of boron carbide, which make it suitable for a wide range of applications,demands the development of low-cost and green synthesis method. In the present work, the commonly available leaves of aloe vera are hydrothermally treated to form the carbon precursor for the synthesis of boron carbide. The morphological characterization reveals the porous nature of the precursor turning into a tubular structure upon boron carbide *** structural characterization by x-ray diffraction and other spectroscopic techniques such as Fourier transform infrared,Raman, photoluminescence and uv-visible near-infrared spectroscopy confirm the formation of boron carbide. The thermogravimetric analysis of the sample is found to exhibit good thermal stability above 500 °C. When the sample is annealed to 600 °C, boron carbide with phase purity is obtained, which is confirmed through XRD and FTIR analyses. The optical emission properties of the sample are studied through cie.plot and power spectrum. Compared with other natural precursors for boron carbide, the aloe vera is found to give a good yield above 50%.

关键词： aloe vera boric acid boron carbide hydrothermal method

Enhancement of luminescence intensity and spectroscopic analysis of Eu^(3+) activated and Li^+ charge-compensated Bi_2O_3 nanophosphors for solid-state lighting

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Journal of Rare Earths 2019年第4期37卷 356-364页

作者： S.Ashwini S.C.Prashantha RamachANDra Naik h.Nagabhushana Department of Physics Channabasaveshwara Institute of Technology Research Center Department of Science East West Institute of Technology Department of Physics New Horizon College of Engineering CNR Rao Center for Advanced Materials Tumkur University

The present work reports the synthesis, characterization, photoluminescence and photocatalytic activity of Eu^(3+)(1 mol%-11 mol%) doped and Li^+(0.5 mol%-5 mol%) co-doped Bi_2 O_3 nanophosphors(NPs) by sonochemical method. The average particle size was estimated using powder X-ray diffraction(PXRD)and transmission electron microscopy(TEM) and is found to be in the range of 30-35 nm. The scanning electron microscopy(SEM) images were highly dependent on sonication time and concentration of epigallocatechin gallate(EGCG) bio-surfactant. The energy gap of doped and co-doped Bi_2 O_3 nanophosphors was estimated using Kubelka-Munk(K-M) function and is found to be in the range of2.9-3.08 eV. The effect of Li+ co-doping on luminescence of optimized Bi_2 O_3:Eu^(3+) was studied and is found about more than 3 fold enhancement of emission intensity. Judd-Ofelt parameters(Ω_2, Ω_4 and Ω_6).transition probabilities(A_T), quantum efficie.cy(η), luminescence lifetime(τ_(rad)), color chromaticity coordinates(cie. and correlated color temperature(CCT) values were estimated from the emission spectra and are discussed in detail. The estimated cie.chromaticity co-ordinates are very close to the NTSC(National Television Standard Committee) standard value of red emission. The synthesized NPs show excellent photocatalytic activity of acid red-88 under UV-light irradiation, which can degrade 98.1% in60 min. The decreasing electron-hole pair recombination rate with quick electron transfer ability is predominantly ascribed to the balance between crystallite size, morphology, band gap, defects, surface area, etc. These results show a light for the use of sonochemical route of Bi_2 O_3:Eu^(3+):Li^+ in solid state display and photocatalytic applications.

关键词： Bi2O3:Eu3+:Li+ Sonochemical Photoluminescence cie n CCT Photocatalysis Rare earths

Luminescence properties of dysprosium doped YVO_4 phosphor

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Journal of Rare Earths 2018年第12期36卷 1245-1249页

作者： h.J.Rajendra C.PANDurangappa D.L.Monika Department of Physics RNS Institute of TechnologyChannasandra Department of Physics SJB Institute of Technology

Trivalent dysprosium(Dy) activated nanocrystalline yttrium vanadate(YVO) phosphor was synthesized via co-precipitation method. The prepared samples were characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM), optical absorption and photo luminescence(PL) techniques. The XRD patterns reveal the tetragonal crystalline phase. SEM images reveal that Dy doped YVOnanocrystals are agglomerated. EDAX confirms the formation of YVO:Dy. FTIR spectrum shows two strong absorption bands at 459 and 761 cm. Optical absorption spectrum showed the surface defects in the as-prepared samples. The PL emission spectrum shows two characteristic emission bands at 485 and 575 nm. The strong yellow emission peak at 575 nm is assigned to ~4 F→~6 hhyper sensitive transition of Dyions, Study of cie.chromaticity diagram indicates the suitability of the phosphor for the development of yellow-green LEDs.

关键词： Precipitation Yttrium vanadate Dysprosium X-ray diffraction Photoluminescence Rare earths

Comparative study of Eu^(3+)-activated LnOCl(Ln=La and Gd) phosphors and their Judd-Ofelt analysis

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Journal of Rare Earths 2015年第9期33卷 946-953页

作者： N.Dhananjaya C.Shivakumara Rohit Saraf Sukanti Behera h.Nagabhushana Department of Physics B.M.S. Institute of Technology and Management Solid State and Structural Chemistry Unit Indian Institute of Science C. N. R. Rao Center for Advanced Materials Tumkur University

Eu3＋-activated layered LnOCI （Ln=La and Gd） phosphors were synthesized by the conventional solid-state method at relatively low temperature （700 ℃） and shorter duration of 2 h. The structural parameters were refined by the Rietveld refinement analysis and confirmed by the high resolution transmission electron microscopy （hRTEM）. Both the compounds were crystallized in the tetragonal structure with space group P4/nmm （No. 129）. The homogeneity of the elements were ana- lyzed by TEM mapping and found to be uniformly distributed. The photoluminescence spectra revealed that the intensity of 5D0--7F2 transition （619 nm） was more intense in Eu3＋-activated GdOC1 compared to LaOC1. This was due to the property of Gd3＋ ions to act as an intermediate sublattice to facilitate the energy transfer to Eu3＋ ions. Intensity parameters and radiative properties such as transition probabilities, radiative lifetime and branching ratio were calculated using the Judd-Ofelt theory. The cie.color coordinates result revealed that the Eu3＋-activated GdOC1 （0.641, 0.354） phosphor was close to the commercial red phosphors like, Y203：Eu3＋（0.645, 0.347）, Y202S：Eu3＋（0.647, 0.343） and National Television System Committee （NTSC）（0.67, 0.33）. The results suggest that the present GdOCI：Eu3＋ compound acts as a potential candidate for red phosphor materials.

关键词： LaOC1 GdOC1 phosphors Judd-Ofelt cie rare earths

The research of vegetation coverage classification using NDVI data in China

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The research of vegetation coverage classification using NDV...

Image Content-based Watermarking Resistant against Geometrical Distortions

International Conference on Info-Tech and Info-Net (ICII 2001)

作者： Cheng, CQ Wang, h Ma, T Li, B Peking Univ Inst Remote Sensing & GIS Beijing 100871 Peoples R China

ISBN: (纸本)7900081585

The Normalized Difference Vegetation Index (NDVI) is very important index, which often is a measure of the amount and vigor of vegetation at the surface. In general, the magnitude of NDVI is related to the level of photosynthetic activity in the observed vegetation. There have been quite a lot of successful examples in using this Index to classify vegetation and to forecast the amount of crop in China. We used 12 monthly NOAA AVhRR NDVI data pretreated necessarily of the year 1999 to establish the standard deviation matrix of every ground surface element all over China, and then estimated the comparability between every two elements. But because of some deficie.cy when it is used to demonstrate the difference of NDVI changes within only a part of time, two factors should be considered, which include a factor for controlling range changes and a factor for controlling the direction of time changes. To establish the first factor is to distinguish the surface elements which have similar standard deviation but have different NDVI range changes in different range of time. To establish the second factor is to distinguish the change direction of all the NDVI of different elements. The standard deviation and the factors form a set, which helped us to analyze the conformation and difference of changes between elements, and finally we gained the classified result, And referring to Chinese vegetation and zoology distributing map, we discussed every class in our result carefully, which was explained further.

关键词： NDVI vegetation coverage factor set classification

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Image Content-based Watermarking Resistant against Geometric...

Rapid visualization of latent fingerprints using novel CaSiO_3:Sm^(3+) nanophosphors fabricated via ultrasound route

2006 8th International Conference on Signal Processing

作者： Yuan,W.G. Ling h.F. Lu z.d. Zou F.h. Yu Y.W. School of Computer Scie.ce Huazhong University of Science＆Technology

ISBN: (纸本)0780397371;9780780397378

＜正＞A geometrically robust watermarking scheme was proposed based on image local content,which could resist both image cropping and RST *** first extracts the robust feature points,and then partitions the image into multi circular *** area is transformed into PM sub-images,then 2-D DFT is performed and the magnitudes are used as the watermark-embedding *** the watermark is embedded by modifying the DFT magnitudes using energy *** with Fourier-Mellin transform-based watermarking,its computational cost is reduced as only one 2-D DFT is performed. Moreover,the method can overcome the interpolation problem by using PM in the spatial domain because images have a similar scale between neighboring pixels.

关键词： Digital watermarking

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Journal of Rare Earths 2019年第1期37卷 32-44,M0003页

作者： R.B.Basavaraj G.P.Darshan B.Daruka Prasad S.C.Sharma h.Nagabhushana Prof.C.N.R.Rao Centre for Advanced Materials Tumkur University Department of Physics Acharya Institute of Graduate Studies Department of Physics B M S Institute of Technology and ManagementVTU Affiliated Department of Mechanical Engineering Jain UniversityAdvisor Jain Group of Institutions

Latent fingerprints (LFPs) were the most significant identification method for individualization. Most commonly available fingerprints (FPs) in crime spot investigation were latent and patent types. Generally,LFPs were invisible and thus the effective visualization technique necessitates for the analysis of such FPs. In the past years, many traditional visualization techniques have been employed, but suffered with low resolution, sensitivity, contrast and high background noise. To overcome such limitations, we synthesized Sm^(3+) doped CaSiO_3 nanophosphors (NPs) via an ultrasound irradiation route using mimosa pudica (m. p.)leaves extract as a bio-surfactant. The morphological behavior of the prepared samples was extensively studied by varying the concentration of the m. p. extract, ultrasound irradiation duration, ph level of the precursor solution and sonication power. The photoluminescence (PL) emission spectra exhibit characteristic peaks at～561,601 and 647 nm, which were attributed to^5G_(5/2)→~6h_J(J=5/2,7/2 and 9/2) transitions of Sm^(3+) *** Judd-Ofelt(J-O) intensity parameters and other radiative properties were estimated using PL data. The Commission International de I'Eclairage (cie. color coordinates were positioned in orange-red region shows average correlated color temperature (CCT) value of～3576 K. The optimized samples can be used as a labeling agent for the visualization of LFPs on various porous and non-porous surfaces under normal light irradiation. The visualized FPs reveals well defined ridge characteristics, namely whorl, loop,arch, bifurcation, eye, island, bridge, sweat pores, etc, with high sensitivity, selectivity, low contrast and background hindrance. Aforementioned results evidence that the prepared CaSiO_3:Sm^(3+) NPs were promising luminescent materials for solid state lighting and forensic applications.

关键词： Ultrasonication,synthesis Photoluminescence Fingerprint Photometric properties Judd-Ofelt analysis Rare earths