Papers by Keyword: IR

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Authors: Ni Na Bao, Yong Guang Yin, Quan Kai Wang
Abstract: Sika deer antler velvet layer is a kind of precious traditional Chinese medicine, which has been widely used for treatment of some diseases. In this study the extraction of ganglioside from the lipid soluble fraction of sika deer antler velvet layer was investigated. The quantitative effects of ratio of liquid to raw material, temperature, time were investigated for extraction of ganglioside. The optimal ganglioside extraction conditions were determined: ratio of liquid to raw material 11, temperature 40°C and time 7min. Residue which was separated from the lipid soluble fraction of sika deer antler velvet layer was proved to be ganglioside by IR.
Authors: Aurelian Ovidius Trufasu
Abstract: This Paper is about IR Technology for Roughness Evaluation of Upper Layer of Mineralglass Lenses, Prisms or Reticules. Based on Simple Observation that Friction Islinked with Higher Temperature, Authors Evaluated the same Optical Surfaces Bytwo Methods: Microscopic and IR Evaluation. Facts are Extremely Encouraging,because Results are Similar; Zones with Higher Level above Average are Warmerand those under Average are Colder.
Authors: Jin Peng Qi, Ying Zhu, Yong Sheng Ding
Abstract: Generally, a cell can trigger its self-defense mechanism in response to genomic stress under acute perturbations from outer environment. To investigate the dynamic kinetics of cellular repair mechanisms in fighting against genomic stress, a mathematical model of representing and analyzing DNA damage generation and repair process is proposed under acute Ion Radiation (IR) by using the Kinetic Theory of Active Particles (KTAP). In this paper, we focus on describing a mathematical framework of Cellular Repair System (CRS). We also present the dynamic processes of Double Strand Breaks (DSBs) and Repair Protein (RP) generating, DSB-protein complexes (DSBCs) synthesizing, and toxins accumulating under continuous radiation time.
Authors: M. Kurzawa, I. Rychlowska-Himmel, M. Bosacka, G. Dabrowska
Authors: Min He, Hong Li Wang, Dong Wei Cao, Mei Yu Zhang, Hai Yan Zhang, Yan Ju Chen, Yan Jun Zhang
Abstract: This paper explains and demonstrates the aging performance and structure of bio-asphalt with analytical results from hot stage microscopy, infrared spectroscopic and nuclear magnetic resonance spectra. The experimental results showed that the aging of bio-asphalt is mainly caused by a large amount of coke substance generated during the process, and the addition of BHT can improve the aging resistance of bio-asphalt to some extent. Catalytic hydrogenation facilitate the removal of aldehyde, ketone and carbon-carbon double bond so as to strengthen the aging resistance of bio-asphalt, nuclear magnetic analysis further confirms the results from IR .
Authors: Y. Kamiura, Tomoyuki Maeda, Y. Yamashita, Fumio Hashimoto
Authors: In Chul Lim, B.C. Lee, Cheul Muu Sim, Moon Saeng Kim, Chang Hee Lee, B.J. Jun, H. Kobayashi, Shigeya Watanabe, Masanori Satoh
Authors: M. Elisa, Ileana Cristina Vasiliu, Cristiana Eugenia Ana Grigorescu, B. Grigoras, H. Niciu, Daniela Niciu, Aurelia Meghea, Nicoleta Iftimie, Maria Giurginca, Patrascu Roxana, Joe Trodahl, M. Dalley
Abstract: A wet non-conventional method for preparing aluminophosphate glasses is presented. Aluminophosphate glasses belonging to the oxide system Li2O-BaO-Al2O3-La2O3-P2O5, doped with rare-earth ions (Pr3+, Er3+, Gd3+, and Yb3+) were obtained. The influence of the doping ions on the optical properties of the phosphate glasses has been investigated in relation with micro-structural and local electronic phenomena The optical behavior of Li2O-BaO-Al2O3-La2O3-P2O5 glasses doped with 3% mol. rare-earth ions has been studied by ultra-violet-visible-near-infra-red (UV-VISNIR) spectroscopy. The transmission spectra revealed electronic transitions between 4f and 6s inner orbital of the rare-earth ions. Structural information via optical phonons was provided by infra-red (IR) absorption spectra in the range 400-4000 cm-1. IR optical phonons are characteristic for the vitreous phosphate network, showing out the glass network-forming role of P2O5. The absorption spectra present the main PO2 and P-O-P symmetrical stretch modes besides P-O-P bend mode, P-OH, P=O, PO3 2-, asymmetrical and symmetrical vibration modes. Fluorescence spectra of the rareearth- doped aluminophosphate glasses, in the visible range, were obtained by laser excitation at 514.5 nm. The fluorescence signals revealed specific electronic transitions, which provide visible and near-infra-red emission. Glasses containing rare-earth ions exhibit luminescence at the following wavelengths: Pr3+ ions at 820 nm and 880 nm, Er3+ ions at 520 nm, 550 nm and 560 nm, Gd3+ ions at 530 nm, 540 nm, 550 nm 820 and 880 nm, Yb3+ions at 530 nm, 540 nm, 550 nm and 980 nm.
Authors: N. Bošnjaković, S. Uskoković-Marković, U.B. Mioč
Authors: Chao Wang, Bing Teng, Lin Hua Xia, De Gao Zhong, Yu Yi Li, Mu Liu, Yang Li, Xiu Jie Feng, Xu Jun Deng
Abstract: The flux growrh method is employed to grow the Yb:LuPO4 crystal using lead pyrophosphate Pb2P2O7 as the high-timperature solvent. The infrared spectroscopy(IR) was tested to determine the purity of the obtained crystal. The absorption spectra of the 5% Yb-doped Yb:LuPO4 crystal was measured at room temperature. Three absorption peaks that located on 985nm, 976nm and 953nm were found, and the absorption cross sections on the absorption peaks were calculated respectively. The results shows that Yb:LuPO4 crystal has potential to be applied as laser material.
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