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ASYMPTOTIC BEHAVIOR OF THE TE AND TM APPROXIMATIONS TO SECOND HARMONIC GENERATION

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Journal of Computational Mathematics 2007年第1期25卷 49-66页

作者： na■ma A■ssa Faculté de Mathématiques USTHBBP32El AliaBab Ezzouar16111Alger Centre de Mathématiques Appliquées CNRS UMR 7641■Ecole PolytechniquePalaiseau 91128 CedexFrance

We consider a Second Harmonic Generation （SHG） problem of an optical signal wave with an optical pump in a medium represented by a smooth bounded domain Ω→∩ ir^d which is assumed to contain a heterogeneous material： a compactly imbedded subdomain B^r →∩∩ in the shape of a small ball contains a nonlinear material, while Ω／ B^r is filled with a linear material. We begin by proving existence and uniqueness of the solution to the TE approximation of SHG for arbitrary bounded susceptibilities, thus improving the result obtained by Bao and Dobson （ Eur. J. Appl. Math. 6 （1995）, 573-590） under small enough susceptibilities assuption. We then establish an existence and uniqueness result of a solution to the TM approximation problem. In both parts we study the asymptotic behavior of the system as the size of the nonlinear material vanishes： error estimates and asymptotic expansion of the solution are derived for both TE and TM approximations.

关键词： Second harmonic generation TE Approximation TM Approximation.

Rare earth metals modified Ni-S2O8^2-/ZrO2-Al2O3 catalysts for n-pentane isomerization

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Chinese Journal of Chemical Engineering 2017年第1期25卷 74-78页

作者： Hua Song lele Zhao na Wang College of Chemistry ＆ Chemical Engineering Northeast Petroleum University Daqing 163318 China Provincial Key laboratory of Oil ＆ Gas Chemical Technology College of Chemistry ＆ Chemical Engineering Northeast Petroleum University Daqing 163318 China

The effects of adding rare earth(RE) metals,such as Ce,Yb and Pr to Ni-S_2O_8^(2-)/ZrO_2-Al_2O_3(Ni-SZA) on the structure of catalysts as well as their isomerization performance were *** prepared catalysts were characterized by XRD,BET,FT-ir,Py-ir,and H_2-TPR,The results showed that the addition of RE metals can increase the strength and amounts of the acid sites,improve the redox properties of *** Yb-Ni-SZA catalyst showed the best redox properties,which could provide enough metallic *** addition,it provided the largest amounts of weak and moderately strong acid *** RE metals modified Ni-SZA catalyst,Yb-Ni-SZA exhibited the highest isopentane yield of 61.7%at 160 °*** optimum isomerization catalytic performance of the catalysts decreased in the order of Yb-Ni-SZA > Pr-Ni-SZA > Ni-SZA > Ce-Ni-SZA.

关键词： Rare earths Solid superadd Catalyst Hydroisomerization

Synthesis and luminescence properties of rare earth ternary complexes consisting of Tb(Ⅲ), β-diketones and 1,10-phenanthroline (phen)

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Rare Metals 2008年第6期27卷 612-616页

作者： lIU Xingwang WANG na SUO Quanling School of Chemical Engineering Inner Mongolia University of Technology Hohhot 010051 China School of Chemistry Baotou Teacher＇s College Baotou 014030 China

In order to study the luminescent properties of ternary rare earth complexes with fl-diketone ligand, three new β-diketone ligands, 1-phenyl-3-（p-phenylethynylphenyl）-1,3-propanedione（HPPP）, 1-（2-thienyl）-3-（p-phenylethynylphenyl）-1,3-propanedione （HTPP） and 1-（2-furyl）-3-（p-phenylethynylphenyl）-1,3-propanedione （HFPP）, were synthesized by Sonogashira coupling reaction and Claisen condensation. Three new ternary rare earth complexes, Tbl3phen （l = PPP, TPP, or FPP）, were synthesized by the reaction of rare earth chloride TbCl3,1,10-phenanthroline （phen） with HPPP, HTPP, or HFPP respectively, in alcohol solution. The compositions were characterized by means of elemental analysis, chemical analysis, and ir spectra. luminescent properties of the three new complexes have been studied. The results show that the ternary Yb（Ⅲ） complexes only emit the weak fluorescence of the Tb（Ⅲ） ion, which reveals the triplet state energy of the ligands does not match well with the excited state vibrating energy of Tb^3＋ ion.

关键词： rare earth ternary complex luminescence property β-diketone

lanthanide complexes-functionalized ordered mesoporous TiO_2:Multicolor emission(visible and near-infrared luminescence) based on visible-light sensitization

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Journal of Rare Earths 2018年第9期36卷 939-945页

作者： Zhijuan Wang Song Dang Shu'na Zhao lining Sun Research Center of nano Science and Technology and School of Material Science and EngineeringShanghai University State Key laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Saiences

Recently,much attention has been paid to the lanthanide luminescent materials based on the visiblelight sensitization for their potential applications in the fields of bio-imaging and optical *** this work,the lanthanide complexes have been covalently bonded to the ordered mesoporous titania（OMT） matrix,and the resulting titania-based hybrid ordered mesoporous materials（named as lnDBOMT,ln = Eu,Sm,Yb,Nd） were characterized by using Fourier-transform infrared（FT-ir） spectroscopy,small-angle X-ray powder diffraction（SAXD）,N2 adsorption-desorption isotherms,transmission electron microscopy（TEM）,fluorescence spectroscopy,and thermogravimetric ***,exciting with visible light is advantageous over UV *** importance here is that,under excitation with visible light,the lnDB-OMT all show characteristic visible（Eu3＋,Sm3＋） as well as nearinfrared（Sm3＋,Yb3＋,Nd3＋） luminescence of the corresponding ln3＋ ions（multicolor emission covered from 500 to 1400 nm spectral region）,which is attributed to the energy transfer from the ligands to the ln3＋ ions via an antenna effect.

关键词： Visible-light excitation Visible luminescence Near-infrared luminescence lanthanide complexes-functionalized Ordered mesoporous titania Rare earths

Two New 2D POMs-Based Inorganic-Organic Hybrid Compounds Constructed from the Proline and 4,4＇-Bipy Mixed ligands

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Chinese Journal of Chemistry 2017年第3期35卷 347-353页

作者： Yanli Ren Dandan Yang na li Rudan Huang Key laboratory of Cluster Science of Ministry of Education School of Chemistry Beo'ing Institute of Technology Beijing 100081 China

Two new 2D hybrid compounds derived from Keggin-type [BW12O40]5− anion, proline and 4,4’-bipy were synthesized, namely, [CoII2(proline)(4,4’-bipy)(H4,4’-bipy)2(OH)(H2O)2][BW12O40]•3H2O (1) and [CoII3(proline)2(4,4’- bipy)2(H4,4’-bipy)4(OH)2(H2O)4][BW12O40]2•6H2O (2). They are characterized by single-crystal X-ray diffraction, FT-ir spectra, powder X-ray diffraction (PXRD), thermogravimetric analyses (TGA) and XPS spectra. All compounds represent 2D framework, but the structures possess some distinctions to a certain degree. In compound 1, 1D wave-like chains are formed. The chains and polyanions are stacked each other in an ABAB fashion to yield a 2D network. However, compared with compound 1, compound 2 exhibits the same construction except for the opposite arrangement mode. Moreover, their electrochemical behaviors and fluorescence properties have been investigated. The electrochemical properties show that compounds 1, 2 display good electrocatalytic activities for the reduction of nitrite.

关键词： [BW12O40]5− anion proline 4 4’-bipy hybrid compound electrochemical property

Structures and Properties of Three Solvent-Dependent Chiral Compounds Based on N-Benzoyl-l-glutamic Acid

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Chinese Journal of Chemistry 2016年第12期34卷 1335-1343页

作者： Yajing Shi na li Huihua Song Haitao Yu College of Chemistry and Material Sciences Hebei Normal University Shijiazhuang Hebei 050024 China

Three solvent-dependent chiral copper（II） compounds, {[Cu2（bzgluO）2（HzO）2]-4HzO}n （1）, {[Cu2（bzgluO）2-（DMSO）2].H2O}, （2） and [Cuz（bzgluO）2（DMF）2], （3）（H2bzgluO=N-benzoyl-l-glutamic acid） have been synthe-sized under ambient temperature conditions and characterized by elemental analysis, ir spectra, UV spectra, ther- mogravimetric analysis, powder X-ray diffraction （PXRD） and single-crystal X-ray diffraction. Compounds 1 and 2 both crystallize in the orthorhombic space group P212121. Compound 3 crystallizes in the tetragonal space group P43. Compound 1 exhibits a ladder-like 1D chain structure, which is extended by hydrogen-bonding interactions to form a 3D supramolecular network. Compounds 2 and 3 both give a diamond-like 3D structure. Besides, there are hydrogen-bonding interactions in 2. The structural difference indicates that the solvent system plays a crucial role in modulating structures of coordination compounds. Circular dichroism （CD） and the magnetic properties of the compounds have also been investigated.

关键词： N-benzoyl-l-glutamic acid chiral copper(Ⅱ) compounds solvent-dependent magnetic properties

The inhibitory effects of NKX3.1 on IGF- 1R expression and its signalling pathway in human prostatic carcinoma PC3 cells

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Asian Journal of Andrology 2012年第3期14卷 493-498,I0009-I0010页

作者： Peng-Ju Zhang Xiao-Yan Hu Chun-Yan liu Zhao-Bo Chen na-na Ni Yang Yu li-na Yang Zhao-Qin Huang Qing-Wei liu An-li Jiang Institution of Biochemistry and Molecular Biology Medical School of Shandong UniversityJinan 250012China The People's Hospital of Zhangqiu City Zhangqiu 250200China Department of Radiology Shandong Provincial HospitalJinan 250021China

NKX3.1, which is a prostate-specific homeobox gene, plays an important role in prostate cancer and usually functions as a tumour suppressor gene. In this study, we investigated the inhibitory effect of NKX3,1 on insulin-like growth factor （IGF）- 1R expression and its downstream signalling pathway in PC3 cells, PC3 cells were stably transfected with NKX3.1 expression plasmid （pcDna3.1-NKX3.1） or vector plasmid （pcDna3.1＋）. The IGF-ir mRna and protein expression levels were assessed in PC3-NKX3.1 transfectants by reverse transcriptase-polymerase chain reaction （RT-PCR） and Western blotting. The expression and activation of IGF-1/IGF-1R downstream signalling targets were examined by Western blotting and luciferase reporter assay. The cells were subsequently treated with relevant concentrations of IGF-1. The effect of IGF-1 on cell growth was examined by 3-（4,5）-dimethylthiahiazo（-z-yl）-3, 5-diphenytetrazoliumromide （MTT） assay and flow cytometry analysis. A significant suppression of IGF-1R mRna and protein expression was observed after forced expression of NKX3.1 in PC3 cells. Correspondingly, the forced expression of NKX3.1 decreased IGF-l-induced phosphorylation of extracellular signal-regulated kinase 1/2 （ERK1/2） and protein kinase B （AKT） and activation of the Elk-1 transcription factor and downregulated the expression of the downstream target genes c-fos and cyclin D1. Furthermore, the forced expression of NKX3.1 inhibited IGF-l-induced cell growth. In conclusion, NKX3.1 could downregulate IGF-1R expression and could inhibit IGF-1R-mediated mitogen-activated protein kinase （MAPK）/ERK and AKT signalling pathways, which might partially leads to the inhibition of IGF-l-induced cell growth. This study provides new insights into the molecular mechanisms that NKX3,1 exerts against prostate cancer and ultimately expands the scope of alternative approaches in advanced prostate cancer therapy.

关键词： IGF-I IGF-1R NKX3.1 prostate cancer

Recovery of Chitin and Protein from Shrimp Head Waste by Endogenous Enzyme Autolysis and Fermentation

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Journal of Ocean University of China 2019年第3期18卷 719-726页

作者： GUO na SUN Jianan ZHANG Zhaohui MAO Xiangzhao College of Food Science and Engineering Ocean University of China Qingdao 266003 China laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China

The industrial processing of shrimp produces massive quantities of solid waste that is a notable source of animal protein, chitin, carotenoids, and other bioactive compounds that are not appropriately utilized. In the present study, chitin and protein extraction from shrimp head with autolysis and fermentation using Bacillus licheniformis were investigated. The results showed that when shrimp heads were autolyzed with a natural pH at 50℃ for 4 h, the total amino acid nitrogen in the supernatant was 5.01 mg ml^-1. Then, when a 50%(v/m) inoculum of the hydrolysate was incubated at 60℃ for 10 h, a deproteinization rate of 88.3% could be obtained. The fermented supernatant was processed into a dry protein powder, while the residues were demineralized by 10% citric acid for chitin. The recovered protein powder contained 5.5% moisture, 11.5% ash, and 66.7% protein, while the chitin contained 3.5% moisture, 2.1% ash, and 3.1% protein. In addition, amino acids, minerals, heavy metals, the degree of acetylation, microstructure, and Fourier-transform infrared(FT-ir) spectroscopy results were analyzed. Furthermore, the statistics of the large scale trial after treatment with 20 kg of shrimp heads were analyzed. Thus, this work made the shrimp waste utilization environmentally sound and valuable.

关键词： shrimp head waste endogenous enzyme autolysis fermentation chitin

Identification and Molecular Tagging of leaf Rust Resistance Gene (lr24) in Wheat

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Agricultural Sciences in China 2011年第12期10卷 1898-1905页

作者： ZHANG na YANG Wen-xiang lIU Da-qun Department of Plant Pathology/Biological Control Center of Plant Diseases and Plant Pests of Hebei Province Agricultural University ofHebei Baoding 071001 P.R.China

This research was aimed to develop AFlP markers co-segregated with gene lr24 and validate the using for marker assisted selection （MAS）. An F2 population developed from the cross between the resistant line Tclr24 and the susceptible line Thatcher was tested for resistance to the Puccinia triticina races BGQQ and SHRT using for genetic analysis and molecular marker. A total of 224 AFlP primer combinations were used to test the resistant and susceptible parents, as well as the resistant bulk and the susceptible bulk. Four AFlP markers, P-AGA/M-CTT289 bp, P-AGC/M-CAC1ss bp, P-AGC/M- CAC162 bp, and P-ACG/M-CGC239 bp, were co-segregated with lr24. The AFlP fragment from the primer combination P- ACG/M-CGC was cloned, sequenced and converted into a STS marker named as ASTS212. Thatcher backgrounded NIls and 115 varieties were examined by using this STS marker and the marker SCS13026oz developed by Gupta. 5R615, 5R616, ir13, and 1R17 were identified and validated to contain gene lr24. The marker is dominant and may be useful in identification the resistance gene lr24 in wheat and wheat breeding programs.

关键词： wheat leaf rust lr24 gene AFlP STS MAS