Synthesis and Crystal Structure of 5-Allyl-2,3-dihydro-9-（2-hydroxy-5-oxocyclopent-1-enyl）-cyclopenta[b]chromen-1（9H）-one Monohydrate

The title compound 5-allyl-2,3-dihydro-9-(2-hydroxy-5-oxocyclopent-1-enyl)-cyclopenta[b]chromen-1(9H)-one monohydrate(C20H18O4.H2O,Mr = 340.36) was synthesized and crystallized.It crystallizes in the triclinic system,space group P with a = 8.5840(17),b = 8.7027(17),c = 11.561(2),α = 89.69(3),β = 74.33(3),γ = 86.13(3)°,V = 829.6(3)3,Z = 2,Dc = 1.363 g/cm3,MoKa radiation(λ = 0.71073 ),F(000) = 360,μ = 0.098 mm-1,the final R = 0.0430 and wR = 0.1008 for 2957 observed reflections with(I > 2σ(I)).X-ray analysis reveals that atoms C(1),C(2),C(3),C(4),C(5) and O(1) on the new pyran ring are coplanar,which is obviously different from the half-chair or boat conformations of other similar compounds.     

烟气循环流化床同时脱硫脱硝试验及机理研究

实验制备了以粉煤灰、石灰为原料的高活性吸收剂, 并在其中加入氧化性M添加剂使之成为具有氧化能力的高活性吸收剂. 在烟气循环流化床上进行了同时脱硫脱硝试验, 研究了影响同时脱硫脱硝效率及钙利用率等的若干因素. 在最佳试验条件下, 脱硫效率和脱硝效率分别达到了95.5%和64.8%. 实验对反应后吸收剂中SO₂和NO的脱除产物进行了成分分析, 结果表明, 在脱除产物中除了有硫物种外还有大量氮物种, 利用扫描电子显微镜和X射线能谱仪对高活性吸收剂基本材料如粉煤灰、“富氧型”高活性吸收剂和反应后的“富氧型”高活性吸收剂进行了表面微区分析, 根据试验结果提出了“富氧型”高活性吸收剂的脱硫脱硝机理.     

微波辐射下氨磺酸催化水相合成3,3-亚芳基双(4-羟基香豆素)

在水介质中, 用氨磺酸作催化剂并经微波辐射, 使芳醛与4-羟基香豆素反应合成3,3-亚芳基双(4-羟基香豆素), 具有催化剂易得、环境友好、后处理简便、反应时间短和产率高等优点.     

Theoretical Analysis of Neutron Double-Differential Cross Sections of n ＋^9Be Reactions

By using the nuclear reaction model for light nuclei, the calculations of the double-differential cross sections of outgoing neutrons from n ＋^9Be reactions are performed. The total outgoing neutrons are only come from the （n, 2n）2a reaction channel. The （n, 2n）2a reaction channel is achieved through six different reaction approach, which are illustrated in this paper. The calculated results agree very well with the measured data at En = 7.1, 8.09, 8.17, 9.09, 9.97 and 10.26 MeV, because the updated level schemes related to the n ＋ ^9Be reactions have been employed in this calculations.     

在独立α集团模型下对敲出反应16O(p,pα)12C和16 O(α,2α)12C的研究

在独立α集团模型下，利用扭曲波冲量近似(DWIA)，计算了实验室系下入射能量为101.5MeV 的敲出反应¹⁶O(p，pα)¹²C和实验室系下入射能量分别为90Me V和140MeV 的敲出反应¹⁶O(α,2α)¹²C.得到的反应截面和谱因子与实 验数据基本符 合，比用壳模型的结果有了一定的改进，表明独立α集团模型能较好地描述α集团敲出反应 的机理. 关键词： α集团模型 敲出反应 反应截面 谱因子     

微波辐射下合成5-芳亚甲基-2,3-二芳基-4-噻唑啉酮类化合物

在水介质中,以四丁基溴化铵(TBAB)作催化剂,微波辐射下使芳醛与4-噻唑啉酮反应合成一系列5-芳亚甲基-2,3-二芳基-4-噻唑啉酮类化合物.该反应具有反应时间短、产率高、环境友好、后处理简便等优点.所有化合物均经IR,MS,1H NMR和元素分析确定.同时用X射线衍射法测定了化合物4a的晶体结构.     

Theoretical analysis of double-differential neutron emission cross sections for n+~(56)Fe reactions at incident energies of 7-13 MeV

The double-differential neutron emission cross sections for n+⁵⁶Fe reactions at incident energies of 7-13 MeV at different angles are calculated by the UNF (abbreviation for unified, 2009 Version) code, which is based on the unified Hauser-Feshbach and exciton model. The results indicate that the higher the incident energies, the better the results, although there are some discrepancies between the calculated results and the measured data for natural iron. These discrepancies are analyzed in detail in this paper. In addition, the calculated results are also compared with the evaluated results of ENDFB Ⅶ.0 and JEFF-3.1.1 near the angle of 90° at incident energies of 8.17 and 11.5 MeV, respectively.     

含4-噻唑啉酮环的新烟碱类化合物的合成及生物活性

根据生物等排原理和新烟碱类化合物与乙酰胆碱酯酶的作用机理, 以4-噻唑啉酮(4)为中间体设计合成了2-取代-3-(2-氯-5-吡啶亚甲基)-4-氰基亚胺基-1,3-噻唑烷(8a~8c)和5-芳基次甲基-2-芳基-3-(2-氯-5-吡啶亚甲基)-4-噻唑啉酮(5a~5e)两类化合物. 中间体(4)由醛、胺和巯基乙酸缩合得到. 所有化合物的结构均经元素分析和1H NMR确证. 初步生物活性试验结果表明, 部分化合物具有一定的杀菌活性和促进黄瓜子叶生根活性, 化合物8b显示出很好的抗HIV-1蛋白酶活性.