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通过一维1H NMR,13C NMR和二维ROESYNMR技术对盐酸普鲁卡因与β-环糊精(β-CD)的相互作用进行了研究.实验结果表明,盐酸普鲁卡因和β-CD形成了1:1的包结配合物,并根据这些数据提出了包结配合物的空间构型. 相似文献
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β—环糊精包结几种萘衍生物的圆二色性的研究 总被引:2,自引:0,他引:2
本文报道了β-环糊精分别包结α-萘胺,β-萘胺,α-萘乙酸的圆二色谱及紫外吸收光谱,并利用KAJTAR扇形规则,根据所是的Cotton效应符号和各向异性因子确定了客体分子在环糊精空腔中的了同时关联了圆二色谱客体分子大环糊精中的取向和量子计算的矢量矩方向之间的关系,并对量子计算了矢量矩方向的结果给予了定性检验。 相似文献
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β-环糊精包结几种萘衍生物的圆二色性的研究 总被引:1,自引:0,他引:1
本文报道了β-环糊精分别包结α-萘胺、β-萘胺、α-萘乙酸的圆二色谱及紫外吸收光谱,并利用KAJTAR扇形规则,根据所测得的Cotton效应符号和各向异性因子确定了客体分子在环糊精空腔中的取向。同时关联了圆二色谱客体分子在环糊精中的取向和量子计算的矢量矩方向之间的关系,并对量子计算的矢量矩方向的结果给予了定性检验。 相似文献
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制备了一种羧基-β-环糊精衍生物,并将它包络二茂铁,制得了二茂铁-羧基-β-环糊精包络物,用红外光谱、紫外可见光谱、1HNMR、13CNMR等方法表征了羧基-β-环糊精及二茂铁包络物。由于羧基-β-环糊精衍生物破坏了β-环糊精的分子内氢键,并修饰了羧基,使得其水溶性得到明显的提高。研究了包络物的电化学性质,发现其具有良好的氧化还原可逆性和水溶性,可用作电子传递媒介体,循环伏安法测定表明,其检出限为10-7mol/L,表明这类氧化还原具有很高的灵敏度,可以用作性能优异的电化学探针和电流型生物传感器的电子媒介体。 相似文献
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荧光分光光度法测定盐酸普鲁卡因 总被引:10,自引:0,他引:10
根据盐酸普鲁卡因在 pH 12条件下发生水解的产物对氨基苯甲酸的荧光性质 ,用荧光分光光度法测定注射液中的盐酸普鲁卡因。激发和发射波长分别为 2 6 8和 34 0nm。线性范围为 0 0 0~ 5 0 0 μg·mL-1 ,线性回归方程为c=0 0 2 2I - 0 0 81,r =0 9996 ,相对标准偏差 3 4 %。实验了 pH值、干扰离子、卡那霉素、庆大霉素、青霉素、链霉素以及放置时间对测定的影响。测定了盐酸普鲁卡因和对氨基苯甲酸的量子产率 ,讨论了盐酸普鲁卡因的相对荧光强度随 pH值升高和放置时间的延长而增大的原因。方法检出限为 4 9ng·mL-1 。本法与死停法对照 ,结果吻合 相似文献
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甲氧氯普胺和盐酸普鲁卡因顺序注射光谱研究和测定 总被引:1,自引:0,他引:1
在酸性介质中,铈(Ⅳ)与甲氧氯普胺和盐酸普鲁卡因反应生成不稳定的红色产物,研究了不同条件下的光谱吸收曲线,初步探讨了反应机理,并据此建立了顺序注射光度法测定甲氧氯普胺和盐酸普鲁卡因的新方法。测定甲氧氯普胺方法的线性范围9.71~116.6 μg·mL-1,检出限6.5 μg·mL-1,进样频率45 h-1。测定盐酸普鲁卡因的方法的线性范围10.0~130.0 μg·mL-1,检出限7.4 μg·mL-1,进样频率45 h-1。用于针剂和胃复安药片中甲氧氯普胺的含量以及针剂中盐酸普鲁卡因含量的测定,并与标准测定方法对照,经统计学处理无显著性差异,结果满意。 相似文献
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M. Alcolea Palafox 《光谱学快报》2013,46(5):613-638
The infrared and Laser Raman spectra of procaine with free basis in the solid state were obtained. The characteristic vibrational frequencies of their different modes were identified and assigned from isotope shifts and theoretical calculations. An infrared study in the liquid phase was also carried out. The corresponding rotation and inversion barriers in p-amino group were computed by means of different optimization procedures. 相似文献
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A spin label electron spin resonance (ESR) study has been carried out on the interaction between the local anesthetic procaine (PRC) and multilamellar dispersions of di-palmitoylphosphatidylcholine (DPPC). The investigation has been performed either in the gel or in the liquid crystal phase of DPPC varying the anesthetic/DPPC molar ratio as well as the pH of the dispersion medium and using spin labeled DPPC molecules (5- and 16-PCSL) and the di-tert-butyl nitroxide (DTBN) spin probe. On increasing the anesthetic concentration in the dispersion medium up to PRC/DPPC molar ratio of 33 mol.%, a lyotropic transition of the bilayer from the lamellar gel phase Lβ, to the interdigitated Lβi one is observed either at pH 5.0 or at pH 10.0. At intermediate pH values, about pH 7.0, such a PRC concentration dependent transition is absent. A decrease of the partition of the DTBN molecules between the dispersion medium and the fluid hydrophobic phase of DPPC multilayers is observed at pH 5.0 with anesthetic concentration, while an opposite behaviour is evidenced at pH 10.0. The pre- and main-phase transition temperatures of the DPPC multilayers are also affected although to different extent. These results are interpreted in terms of adsorption of the PRC molecules at the surface of the model membrane at the extreme pH values investigated, while at about neutral pH values they intercalate among the DPPC molecules. The protonation state of procaine plays an important role as it determines the way of surface adsorption of the PRC molecules in the neutral form at the high pH value and in the charged cationic form at pH 5.0. 相似文献
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In this paper, two types of new conserved quantities directly deduced by Mei symmetry in phase space are studied. The conditions under which Mei symmetry can directly lead to the two types of new conserved quantities and the forms of the two types of new conserved quantities are given. An example is given to illustrate the application of the results. 相似文献
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两种喷嘴喷射性能的试验研究 总被引:2,自引:0,他引:2
为比较自激振荡脉冲喷嘴和连续射流喷嘴的喷射性能,利用自行搭建的喷嘴性能测试装置对两种喷嘴的喷射性能进行了试验研究,实测了不同压力下两种喷嘴的时均喷液量,分析了不同口径的连续射流喷嘴和自激脉冲喷嘴的喷射特性,主要探讨了连续射流喷嘴、自激喷头下喷嘴直径对喷嘴喷液性能的影响,并进行了两种射流打击油泥样本的对比试验.试验结果表明,时均喷液特性相似的连续射流和脉冲射流在冲击油泥样本时,相同时间下脉冲射流的冲击破坏范围要大于连续射流,根据试验中油泥的屈服破坏过程,确定了射流有效打击力的临界值,建立射流清洗油泥时有效射程的经验估算式. 相似文献
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ABSTRACT Traditionally, for hard materials, two types of straight disclinations are identified although some Somigliana disclinations with different aspects have been treated theoretically. Here, we consider four physically distinct types of curved generalised disclinations, one of which reduces to two straight types, giving a total of five. We indicate typical applications for the different types. 相似文献
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