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991.
导数光谱系数倍率法测定多组分体系感冒清胶囊中盐酸吗啉胍的含量 总被引:1,自引:0,他引:1
This paper provides a basic principle and experimental technique of derivative signal multiplier spectrophotometry in multicomponent mixture. A microcomputer was used to process the spectral data measured on a manual spectrophotometer (UV-7520) for the determination of moroxydine hydrochloride in Gan Mao Qing capsules. Quantitative analysis of multicomponent mixture can be done without sample separation. The selection of optimal wavelength pairs is performed through the program with a computer. The method needs no special spectrophotometer and is simple, rapid and easy to operate. The mean recovery was 99.98 +/- 0.53% (n = 12). 相似文献
992.
993.
The effects of radiofrequency catheter ablation on the metabolic enzymes and Ca++-ATPase of myocytes
Summary Using histochemical technique, the effects of radiofrequency catheter ablation (RFCA) on the activities of LDH, SDH, CCO,
and Ca++-ATPase of guinea-pig ventricular myocytes were examined. The histological changes were observed for comparison. Radiofrequency
energy (500 kHz) delivered was 20 WX 10 s. The results were as follows: RFCA resulted in significant impairments in all the
four kinds of enzymes but without statistical differences in the areas involved in this energy level. No statistically significant
difference was found between the ranges of enzymatic damages and areas of pathological lesions. These findings showed a consistency
in areas of the histological and histochemical lesions resulted from RFCA. 相似文献
994.
Effect of Combined Norethisterone Enantate 50mg Monthly Injectable ContraceptiveonCarbohydrateMetabolismSunDan-li(孙丹利);ShengK... 相似文献
995.
AstudyonimprovementofexpressionofhumanG-CSFcDNAtransferredwithretroviraldouble-copyvectorGuoBaoyu(郭葆玉);ZhangSuying(张淑英);XuHui... 相似文献
996.
阿霉素磁性明胶微球的研究 总被引:2,自引:0,他引:2
报告了阿霉素磁性明胶微球(Adr-MG-ms)的制备与性质,研究了超细氧化铁粒子的合成和磁性明胶微球(MG-ms)在狗体内的栓塞效果。阿霉素磁性明胶微球由2%阿霉素(Adr)、68%明胶和30%的磁铁粒子组成,微球的平均粒径为22μm。在体外实验中,药物释放速度证明微球有缓释的性质。磁铁粒子的平均粒径约为10nm,磁性明胶微球与 ̄(99m)Tc标记磁性明胶微球通过导管分别输入狗的肝动脉内进行栓塞,照相和血管造影显示在未加外磁场时磁性明胶微球在左右肝叶分布几乎相等,而在1200高斯的外磁场作用下,靶部位肝左叶的微球分布是肝右叶的2.25倍,而甲状腺、脑、心脏的微球很微量,结果表明磁性明胶微球在外磁场作用下是一个很好的治疗肝癌的栓塞剂。 相似文献
997.
S. Lu P. C. Doerschuk G. R. Wodicka 《Medical & biological engineering & computing》1995,33(3):293-298
Sonic noise between 300 and 1600 Hz is introduced into the mouths of 11 healthy adult male subjects at resting lung volume and is detected over the anterior extrathoracic trachea and at three sites on the right posterior chest wall. To overcome the difficulties associated with non-parametric phase unwrapping due to thoracic anti-resonances, the pahse delay τ(f) of propagation between the trachea and the chest wall is estimated using a linear parametric ARX-type statistical model with the non-parametric magnitude spectra as a guide. The resulting τ(f) estimates are unambiguous and reliable, and show a clear trend of decreasing τ(f) with increasing frequency, indicating that sound at higher frequencies reaches the chest wall faster than that at lower frequencies. This finding indicates that respiratory sound transmission is highly dispersive, most probably owing to frequencydependent airway and parenchymal wavespeeds. 相似文献
998.
本文分析了25例增殖性玻璃体视网膜病变(PVR)D3级的玻璃体手术,成功率为68%.作者认为对PVR D3级的治疗关键是玻璃体切除联合膜剥离及眼内填充,尤其是硅油填充可明显提高疗效.PVR形成与手术刺激、裂孔大小、外伤及玻璃体积血不关。对玻璃体手术的适应症,作者对手术时机及并发症也作了扼要讨论。
(中华眼底病杂志,1993,9:145-147) 相似文献
999.
Maternal corneal thickness during pregnancy 总被引:1,自引:0,他引:1
We measured central corneal thickness in 89 pregnant women. It was increased 16 micron (P = .01) compared to the control eyes of 18 nongravid and 17 postpartum women. There was no significant difference (P = .79) in corneal thickness between the nongravid and postpartum groups. When comparing subjects by week of gestation, there was no trend over time in corneal thickness (analysis by linear regression). Intraocular pressure was lowered during pregnancy, but it did not correlate with corneal thickness for either the pregnant or nonpregnant group. 相似文献
1000.
Effects of poriatin on mouse peritoneal macrophage membrane and calf serum proteins in vitro 总被引:1,自引:0,他引:1
D Lu 《中国医学科学院学报》1988,10(4):294-298