Molecule modification andmass deposition induced bythe implantation of lowenergy Fe+ ion beamsinto amino acids

Fe+ ion beams with the energy of 110 keV were implanted into films of L(+)-cysteine (HSCH2CH(NH2)COOH). One of the single crystals grown in hydrochloric acid solution with the implanted samples through slow evaporation was structurally characterized by the X-ray crystallography. The crystal is monoclinic, space group C2, with a = 1.8534(4) nm, b = 0.5234(1) nm, c = 0.7212(1) nm, β= 103.72°, V = 0.67965(3) nm3, Z = 4, F(000) = 144.0, Dclac = 1.763 g@cm-3, μ(MoKα) = 1.06 mm-1, T = 293(2) K. R = 0.0379, wR = 0.0835 for 660 observed reflections (I > 2σ(I)). The structural formula of the crystal compound is (CH2CH(NH2)NO2)ClFe (Mr = 180.38 u). Products of heavy ion beam irradiation were purified and it was directly confirmed that the implanted Fe+ ions had been deposited in the novel molecules. The same doses of Fe+ ion beams of the same energy were implanted into films of L(+)-cysteine hydrochloride monohydrate. FTIR spectroscopy of the implanted samples proved that some of the original molecules were seriously damaged and significant modifications were induced.     

含杂共轭分子的轨道与能级

将含杂共轭分子的轨道和能级问题归结为三种直链含杂共轭分子的本征值求解。为了获得解析结果,提出两种近似方法。在两组近似条件下,近似计算结果与直接精确数值解符合得很好。     

聚醚砜超滤膜制备中的多元回归设计

将多元回归设计应用于聚醚砜超滤膜的制备,得到了截留率、水通量与可变因子之间的回归模型和铸膜液的最优组合设计。经实验验证,模型计算值与实验值基本吻合。     

接枝变性淀粉浆料──接枝支链的分子结构设计分析及合成路线

本文从聚合物分子设计的基本思想出发，以纺织浆料材料的几个主要性能要求为依据，首次定性分析了接枝变性淀粉浆料接枝支链的分子结构，归纳出接枝支链的分子结构模型，并提出了合成路线．     

CO_2分子的屈曲

用分子动力学方法模拟了CO2线形分子在纵向压力作用下的屈曲,与连续介质弹性稳定理论得到的计算结果一致.     

武汉流芳垃圾填埋场垃圾渗滤液的氨吹脱研究

研究武汉市芳垃圾填埋场渗流液利用石灰调节PH后铵氮，碱度等值时间，PH的变化规律，为渗滤液的吹脱工艺设计提供一定的参考。     

强化豆乳饮料的研制

乳酸钙和抗坏血酸强化豆乳的工艺条件的研究性试验结果表明：钙盐浓度和PH值大小明显影响制品的品质、乳酸钙强化的适宜浓度为0％－0．09％，PH值为5．5－7．5；抗坏血酸强化适宜添加量为10mg%，PH值为6．30－7．50；最适的加糖量为8％，稳定剂以海藻酸钠为佳，适宜添加量为0．1％。成品通过感官评尝，具有明显的奶香味，甜酸可口。     

中药材质量控制及其方法概述

中药质量控制是保证中药现代化，产业化通讯国际化的核心问题，本文在综述中药发展状况、中药材质量控制的重要性及中药材质量控制方法概况的基础上，指出利用分子光谱法对中药材的原性质进行快速，无损分析是一种非常有潜力的中药材质量控制和鉴别手段。