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	1. Narrow Hyper Imaginary Number and Generalized Hyper Imaginary Number
	Yang Renhu
	Mathematics 11 October 2005
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	Abstract:On the basis of the traditional imaginary number, the author puts forward the concept of narrow hyper imaginary number and generalized hyper imaginary number. It gives a new terse form like traditional imaginary number. Although it is just the advance of the concept, its meaning is very significant. Its characteristics need further study. Especially the problem of infinite is also discussed. Because of the complexity of infinite, it still is a difficulty in the domain of mathematics. In this paper, the author only gives elementary thinking about infinite. Infinite may be regarded as a set and every element in this set has a limit tending to infinity. The concept of natural infinite also be put forward on basis of it. Of course it is just a elementary idea and needs futher study.
	TO cite this article:Yang Renhu. Narrow Hyper Imaginary Number and Generalized Hyper Imaginary Number[OL].[11 October 2005] http://en.paper.edu.cn/en_releasepaper/content/3200


	2. Presentations for finite complex reflection
	Shi Jian Yi
	Mathematics 25 February 2005
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	Abstract:We survey our achievements on the classification of congruence classes of presentations for the finite complex reflection groups. The classification is described in terms of certain graphs for the imprimitive groups, and is based on the computer programmes for the primitive groups.
	TO cite this article:Shi Jian Yi. Presentations for finite complex reflection[OL].[25 February 2005] http://en.paper.edu.cn/en_releasepaper/content/1595

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	3. Homological properties of modules characterized by matrix
	Xiaoxiang Zhang,Jianlong Chen
	Mathematics 26 January 2005
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	Abstract:Let R be a ring and A an $\beta\times\alpha$ matrix over R, where $\alpha$ and $\beta$ are two card numbers. We investigate some homological properties of modules over R by matrices. Thus, $(\alpha, \beta)$-injective (resp., $(\alpha, \beta)$-flat) modules and $(\alpha, \beta)$-coherent rings are introduced and investigated. Some known results on generalized injective (resp., projective, flat) modules as well as ($\pi$-)coherent rings are extended.
	TO cite this article:Xiaoxiang Zhang,Jianlong Chen. Homological properties of modules characterized by matrix[OL].[26 January 2005] http://en.paper.edu.cn/en_releasepaper/content/1503


	4. Directive Electromagnetic Scattering by an Infinite Conducting Cylinder Coated with Left-handed Material
	Sun Jun,Jiang Tian,Sun Wei,Yijun Feng
	Mathematics 15 December 2004
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	Abstract:In this paper, electromagnetic scattering by an infinite conducting cylinder coated with left-handed material (LHM) for an incident wave of a line source is derived rigorously by using a boundary value mode-matching approach. The numerical calculations demonstrate the improved directivity of the electromagnetic scattering by such a cylindrical structure, due to the negative refraction phenomenon of the LHM. The far-field radiation pattern and its frequency dependence exhibit the possible application of the LHM in directive antenna technique.
	TO cite this article:Sun Jun,Jiang Tian,Sun Wei, et al. Directive Electromagnetic Scattering by an Infinite Conducting Cylinder Coated with Left-handed Material[OL].[15 December 2004] http://en.paper.edu.cn/en_releasepaper/content/1357


	5. Synthesis of (R)-2-trimethylsilyl-2-hydroxyl-ethylcyanide catalyzed with (R)-oxynitrilase from loquat seed meal
	Huang Shunrong ,Liu Senlin ,Zong Minhua ,Xu Ruo
	Mathematics 22 November 2004
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	Abstract:The synthesis of optically active (R)-2-trimethylsilyl-2-hydroxyl-ethylcyanide by asymmetric transcyanation of acetyltrimethylsilane with acetone cyanohydrin in a biphasic system was achieved using (R)-oxynitrilase from loquat seed meal. Diisopropyl ether was the most suitable organic phase among the organic solvents examined. The optimal concentration of acetyltrimethylsilane, concentration of crude enzyme, volume ratio of the aqueous to the organic phase, temperature and the buffer pH value were 14 mM, 61.4 U/ml, 13% (v/v), 30 ℃ and 4.0, respectively. The substrate conversion and the product enantiomeric excess were 95% and 98% under the optimized conditions. Acetyltrimethylsilane was a better substrate of the enzyme than its carbon counterpart.
	TO cite this article:Huang Shunrong ,Liu Senlin ,Zong Minhua , et al. Synthesis of (R)-2-trimethylsilyl-2-hydroxyl-ethylcyanide catalyzed with (R)-oxynitrilase from loquat seed meal[OL].[22 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1269


	6. Dipolar Cycloaddition of aphosphorylnitrile Oxide to Vinylphosphonate and Phosphaalyne
	Luo Yong ,Wang Wenhu,Tian Li ,Ye Yong ,Liu Lunzu
	Mathematics 22 November 2004
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	Abstract:Dipolar cycloaddition of (diisopropoxyphosphoryl) nitrile oxide with vinylphosphonate leads to the formation of isoxazoles bearing two or three phosphoryl groups, and with phosphaalkyne provides a phosphabiisoxazole bearing two phosphoryl groups.
	TO cite this article:Luo Yong ,Wang Wenhu,Tian Li , et al. Dipolar Cycloaddition of aphosphorylnitrile Oxide to Vinylphosphonate and Phosphaalyne[OL].[22 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1266


	7. [M(phen)(e,a-cis-1,4-chdc)(H2O)]n(M = Mn and Cu; phen = 1,10-phenanthroline; chdc = 1,4-cyclohexanedicarboxylate)
	Wang Chunxiu ,Hu Changwen ,Li Hui,Niu Xueli,Pan Wanlong,Gong Yun
	Mathematics 10 November 2004
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	Abstract:Two new coordination polymers, [M(phen)(e,a-cis-1,4-chdc)(H2O)]n (1, M = Mn; 2, M = Cu; chdc = 1,4-cyclohexanedicarboxylic acid; phen = 1,10-phenanthroline), were prepared under hydrothermal conditions and characterized by IR spectra and single crystal X-ray diffraction analysis. X-ray crystal structural analyses reveal that 1 and 2 are isomorphic and belong to the monoclinic system. C20H20MnN2O5, P2(1)/c, a = 10.235(2) Å, b = 8.9134(19) Å, c = 20.466(4) Å, b = 99.820(3)°, Z = 4 for 1; and C20H20CuN2O5, P21/c, a = 10.002(3) Å, b = 8.949(2) Å, c = 20.270(5) Å, b = 99.694(3)° Z = 4 for 2. In the structures of 1 and 2, the 1,4-chdc ligand possesses only one kind of e,a-cis conformation although there are both cis- and trans-conformations in the raw material.
	TO cite this article:Wang Chunxiu ,Hu Changwen ,Li Hui, et al. [M(phen)(e,a-cis-1,4-chdc)(H2O)]n(M = Mn and Cu; phen = 1,10-phenanthroline; chdc = 1,4-cyclohexanedicarboxylate)[OL].[10 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1231


	8. Preparation and Cyclization of 4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene- 2,2-dioxide
	Li Tian,Lunzu Liu
	Mathematics 08 November 2004
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	Abstract:Chloroformylation of 5,5-dimethyl-1,2-oxathiolan-4-one 2,2-dioxide 4 with Vilsmeier reagent (DMF/POCl3) led to the formation of cyclic b-chlorovinylaldehyde (4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene 2,2-dioxide 5). Compound 5 reacted with formamidine, o-amino-phenol, phthalamine, amino-pyrazole and amino-tetrazole to give the corresponding heterocyclic compounds.
	TO cite this article:Li Tian,Lunzu Liu. Preparation and Cyclization of 4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene- 2,2-dioxide [OL].[ 8 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1222


	9. A Novel Removal Method of Trace Silicon Impurity from Aluminum Tri-isopropoxide
	Wang Mingyan,Ning Guiling
	Mathematics 20 October 2004
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	Abstract:A novel purification method is proposed to remove trace silicon impurity from aluminum tri-isopropoxide. By interacting a lanthanide-metal complex with the silicon impurity in aluminum tri-isopropoxide, an involatile silicon-containing compound is formed. After a vacuum distillation the silicon content in aluminum tri-isopropoxide can be reduced from 16 ppm to less than 2.6 ppm. The purification process was described and discussed.
	TO cite this article:Wang Mingyan,Ning Guiling. A Novel Removal Method of Trace Silicon Impurity from Aluminum Tri-isopropoxide[OL].[20 October 2004] http://en.paper.edu.cn/en_releasepaper/content/1155


	10. Reactivities of Naphthalene and Its Derivatives toward Hydroconverison
	Sun Linbing
	Mathematics 08 July 2004
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	Abstract:Hydroconversion of naphthalene (NpH) and its derivatives, i. e., 1-methylnaphthalene (1-MN), di(1-naphthyl)methane (DNM) and 1,2-di(1-naphthyl)ethane (DNE) were carried out under 5 MPa of initial hydrogen pressure at 300 oC. The results show that the reactivities of the substrates decrease in the order DNM > DNE > NpH > 1-MN toward activated carbon-catalyzed hydroconversion. The hydrogenation of NpH only yielded tetralin. Two tetrahydro products were observed from 1-MN hydrogenation, but the selectivity of 5-methyltetralin was higher than that of 1-methyltetralin. DNM hydroconversion mainly afforded NpH and 1-MN along with small amouts of hydrogenated di(1-naphthyl)methanes. While the reaction of DNE predominantly produced hydrogenated 1,2-di(1-naphthyl)ethanes rather than decomposition products. The difference in reactivities of NpH and its derivatives can be attributed to their different molecular structures.
	TO cite this article:Sun Linbing. Reactivities of Naphthalene and Its Derivatives toward Hydroconverison[OL].[ 8 July 2004] http://en.paper.edu.cn/en_releasepaper/content/906

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