The Modality Specificity of the Slow Negative Wave

Event-related potentials were recorded in a simple reaction time task using a 3-sec interval between S₁ and S₂. The sensory modalities of S₁ and S₂ were varied across 4 conditions to yield all possible combinations of tones and flashes. A negative component which peaked between 600 and 800 msec after S₁ was specific in scalp distribution to the modality of S₁ but not S₂. It was concluded that this negative component is a response to S₁ and not related to processes associated with anticipation of S₂. A slow negative shift which peaked at S₂ was largest at the vertex in all conditions, suggesting its motor origin. A trend for the latter activity to be more negative in posterior recordings when S₂ was visual than auditory leaves open the possibility that the terminal CNV is a combination of motor activities and anticipation of the sensory modality of S₂.     

Modern Mind-Brain Reading: Psychophysiology, Physiology, and Cognition

This paper reviews the actual and potential benefits of a marriage between cognitive psychology and psychophysiology. Psychophysiological measures, particularly those of the event-related brain potential, can be used as markers for psychological events and physiological events. Thus, they can serve as "windows" on the mind and as "windows" on the brain. These ideas are illustrated in the context of a series of studies utilizing the lateralized readiness potential, a measure of electrical brain activity that is related to preparation for movement. This measure has been used to illuminate presetting processes that prepare the motor system for action, to demonstrate the presence of the transmission of partial information in the cognitive system, and to identify processes responsible for the inhibition of responses. The lateralized readiness potential appears to reflect activity in motor areas of cortex. Thus, this measure, along with other psychophysiological measures, can be used to understand how the functions of the mind are implemented in the brain.     

养血口服液提取工艺的研究

目的：优选养血口服液提取工艺。方法：以干膏收率和总黄酮的含量为指标,采用正交试验法对养血口服液提取工艺进行研究。结果：确定最佳工艺条件为：水煎煮2次,第一次加10倍量水,煎煮1．5小时;第二次加8倍量水煎1,所得煎煮液浓缩至1ml,含1g生药,醇沉浓度为70％。结论：本法可用于养血口服液的生产。     

中药配方颗粒制备工艺研究思路

目的：探讨中药配方颗粒的制备工艺。方法：时中药配方颗粒的生产现状及存在的问题进行分析，对其制备工艺的基本原则进行了探讨。结果：以水为溶媒、煮提方法制备配方颗粒不完全符合中医药特点。汤剂中中药成分间的相互作用是达到增效降毒目的的重要途径之一。结论：为中药配方颗粒的制备提供参考。     

头孢噻呋钠的制备

目的 头孢噻呋钠制备工艺的研究。方法 7-ACA与2-呋喃甲硫羟酸缩合后，与AE活性酯反应得头孢噻呋酸，然后依次将之转化为头孢噻呋盐酸盐及头孢噻呋钠。结果 以7-ACA计算，总重量收率为78．9％。结论 此方法收率高，产品纯度好，适合工业化生产。     

盐酸达克罗宁凝胶的制备

目的：制备盐酸达克罗宁凝胶。方法：用CMC-Na作基质，制备盐酸达克罗宁凝胶，并建立质控方法。结果：处方设计合理，制备工艺可行，平均回收率为100．4％。RSD=O．8％。结论：该凝胶剂质量稳定可靠，可满足临床使用。     

注射用冻干雪莲的制备工艺及质量研究

目的:制备注射用冻干雪莲并建立其质量控制方法。方法:筛选赋形剂的种类和用量,得出最佳处方和制备工艺;以紫外-可见分光光度法测定其含量,并以含量、指纹图谱为主要指标考察其质量。另通过长期试验考察其稳定性。结果:使用40 %甘露醇作为赋形剂效果较好;含量测定中平均加样回收率为99. 4% (RSD=0. 90 % ) ;注射用冻干雪莲比注射液可更好地反应提取液的指纹图谱特征;且经室温留样12mo质量稳定。结论:处方合理、制备工艺可行、质量可控。     

注射用氟康唑的制备工艺及稳定性研究

目的:筛选注射用氟康唑的制备工艺,建立其含量测定方法。方法:以pH值及助溶剂种类等为考察因素筛选处方;采用高效液相色谱法测定其含量。结果:溶液pH在6.5～8.5时制剂稳定性较好,且丙二醇可增加制剂澄明度;氟康唑检测浓度在40～200μg/ml范围内线性关系良好,平均回收率为100.37%,RSD=1.37%(n=3)。结论:按照筛选出的处方、工艺制备的注射用氟康唑质量稳定,含量测定方法准确、可行。     

洛雌油的制备及质量控制

目的:制备洛雌油并建立其质量控制方法。方法:采用紫外分光光度法在283nm波长处测定洛美沙星的含量。结果:盐酸洛美沙星检测浓度在2.5～16.0μg/ml范围内与吸收度呈线性关系(r=0.9995,n=6),平均回收率为99.88%,RSD=0.74%。结论:该制剂制备工艺简单,质量控制方法可行。     

金喉雾化剂治疗声带小结的临床研究

目的探讨金喉雾化剂治疗声带小结的疗效及安全性.方法122例患者随机分为金喉雾化剂治疗组(62例)和西药对照组(60例),均行超声雾化吸入,比较观察金喉雾化剂有效率及安全性.结果治疗组痊愈率为35.48%,总有效率为91.93%;对照组痊愈率为21.67%,总有效率为73.34%,两组差异有非常显著性意义.金喉雾化剂适宜声带小结各证型.结论金喉雾化剂治疗声带小结的临床疗效确切,安全性高.