液体表面张力系数及测量精度的分析

分子之间的相互作用产生分子力,阐述表面张力形成的基本原理。对表面张力系数的测量进行分析,讨论提高测量精度的方法。     

The Development of a Predictive Method for the Estimation of Flux Through Polydimethylsiloxane Membranes. IV. Application to a Series of Substituted Quinolines

The steady-state flux of 33 substituted quinoline derivatives was determined in polydimethylsiloxane membranes using isopropyl alcohol as the receiver solvent. These diffusants constituted a diverse group of compounds possessing a wide range of hydrophobic, steric, and electronic characteristics. Various parameters representing these physicochemical properties such as cyclohexane–water fragmental constants, molar refractivity, Hammett's constants, intramolecular hydrogen bonding ability, melting point, and mole fraction solubility were employed to develop empirical models capable of relating the rate of diffusion to these characteristics of either the substituent on the quinoline ring or the compound itself.     

Natural frequency/damping coefficient relationship of the catheter-manometer system required for high-fidelity measurement of the pulmonary arterial pressure

Using a digital simulation method, we analyzed the relationship between natural frequency (f _n ) and damping coefficient () of the catheter-manometer system required for high-fidelity measurement of the pulmonary arterial pressure. The pulmonary artery pressure waveform was obtained with a catheter-tip transducer and it was fed into a dynamic simulator programmed on a computer. The original waveform and the output of the simulator were compared and judged visually for the fidelity. From this analysis, the combination of f _n and was obtained and was plotted on a f _n – diagram. It showed as an area, which was convex on the left side and open on the right side. The left-convex endpoint was located at a damping coefficient of about 0.7. At a lower heart rate, this area was extended to the lower frequency side, while, at a higher heart rate, this area was limited to the higher frequency side. The f _n – diagram was also constructed theoretically by calculating the relations between natural frequencies and damping coefficients of a second order system with the amplitude and phase error tolerance set at +/–5% respectively.(Kinefuchi Y, Suzuki T, Takiguchi M, et al.: Natural frequency/Damping coefficient relationship of the catheter-manometer system required for high-fidelity measurement of the pulmonary arterial pressure. J Anesth 7: 419--426, 1993)     

1981～2000年《南通医学院学报》学术质量指标综合评价

采用文献计量学方法对《南通医学院学报》20卷78期4713篇论文的多项学术质量指标进行统计分析。结果：（1）信息量指数0．55篇／页;（2）单元作者系数2．33人／篇;（3）论文合著率64．52％;（4）出版时滞8．5个月;（5）国家自然科学基金资助等省部以上课题论文86篇;（6）平均引文量4．81条／篇;（7）衰减系数41．6％,其中中文衰减系数54．6％,外文衰减系数33．4％。统计结果表明,信息量指数呈上升趋势,单元作者系数和论文合著率偏低,出版时滞改善显著,基金资助论文数所占,平均引文量偏少,衰减系数增长明显。     

反相气相色谱法测定溶剂在PBMA中的无限稀释活度系数

用反相气相色谱方法测定了１６种溶剂在聚甲基丙烯酸丁酯（ＰＢＭＡ）中３４３￣４３３Ｋ范围内的无限稀释活度系数,并用周浩等的高分子溶液分子热力学模型对实验结果进行了关联,结果令人满意。     

应用经阴道彩色多普勒对健康育龄妇女子宫卵巢动脉血流状况的研究

目的 研究育龄妇女子宫、卵巢动脉血流变化规律。方法 应用经阴道彩色多普勒对４６０例妇女子宫、卵巢动脉血流在不同月经周期进行搏动指数（ＰＩ）、阻力指数（ＲＩ）检测。结果 血流参数在四个周期间有非常显著性差异（Ｐ〈０．０１）,同时功能侧子宫动脉与卵巢动脉阻抗参数也有差异（Ｐ〈０．０５）。结论 通过检测子宫、卵巢动脉血流有助于对妇科疾患的诊断提供帮助。     

宫内节育器与兔子宫内膜生成内皮素的研究

自制金属单环放入兔左侧子宫角腔内,有明显抗生育效果,此为动物模型。选10只成年雌兔分为二组,将节育环放入每只兔左侧子宫角腔内,右侧为对照。一个月,三个月取子宫内膜,进行形态学观察,内皮素免疫组化定位及内膜组织中内皮素含量的测定。结果显示:内膜形态无明显改变,只在少数局部淋巴细胞略多。内皮素免疫组化定位显示左侧子宫角阳性反应比右侧强,一个月和三个月结果相似。放射免疫测定的内膜组织中内皮素含量左侧明显高于右侧。揭示金属单环引起内膜组织生成内皮素增加。     

人工股骨头置换术的应用解剖

目的:为临床人工股骨头置换术人工假体的选择、安装及定位提供可靠的解剖学参数。方法:对250例(左右各125例)正常成人股骨头、股骨颈、大转子与外上髁间距进行观测,并得出转子髁间距与股骨头最大径、股骨头颈前长和股骨头颈后长的相关系数和回归方程。结果:股骨头最大径为4.39±0.31cm,股骨头颈后长为6.89±0.49cm,股骨头颈前长为6.18±0.43cm,大转子与外上髁间距为34.40±1.79cm。结论:采用本文作者提供的方法选择、安装人工假体准确、实用、方便     

Morphological and functional demonstration of rat dura mater mast cell-neuron interactions in vitro and in vivo

The effects of changes in temperature on primary and secondary endings of isolated cat muscle spindles were investigated under ramp-and-hold stretches and different degrees of pre-stretch. Temperature-induced alterations of the discharge frequency were compared over a temperature range of 25–35°C. Both primary and secondary endings responded to warming with increasing discharge frequencies when the spindle was pre-stretched by 5–10% of its in situ length. The following differences between the temperature effects on primary and secondary endings were observed: (1) The temperature coefficients (Q₁₀) obtained from the discharge frequencies during the dynamic and static phase of a stretch were similar for endings of the same type, but they were larger in primary endings (range of Q₁₀: 2.3–3.3; mean: 2.9) than in secondary endings (range of Q₁₀: 1.6–2.2; mean: 2.0); (2) With primary endings, but not with secondary endings, the temperature sensitivity (imp s⁻¹ °C⁻¹) was larger during the dynamic phase than during the static phase of a stretch; (3) In primary endings, the fast and slow adaptive components occurring in the discharge frequency during the static phase of a stretch clearly increased with warming while in secondary endings, the slow decay was less affected, and the fast decay showed no change; (4) In relaxed spindles, the excitatory effect of warming was overlaid by a strong inhibitory effect as soon as the temperature exceeded about 30°C, resulting in an abrupt cessation of the background activity in most secondary endings, but not usually in primary endings. In general, warming induced an enhanced stretch sensitivity in both types of ending, and additionally an inhibitory effect that is obvious only in secondary endings of relaxed spindles. The different effects of temperature on the discharge frequency of primary and secondary afferents are assumed to be caused by different properties of their sensory membranes.