复方蜥蜴散对慢性萎缩性胃炎模型大鼠血清NO及iNOS水平影响的实验研究

目的:观察复方蜥蜴散对慢性萎缩性胃炎(Chronic atrophic gastritis,CAG)模型大鼠血清NO及iNOS水平的影响,探讨其治疗CAG的作用机制。方法:采取55℃热盐水、2%水杨酸、20mmol/L脱氧胆酸钠三个致萎缩因素配合饥饱失常造成CAG模型。将实验动物分为正常对照组,模型对照组,维酶素组,复方蜥蜴散高、中、低剂量组。检测大鼠血液中NO和iNOS水平及观察胃黏膜组织学方面的改变。结果:模型组大鼠NO和iNOS水平明显高于正常组(P<0.01),病理组织学上也有较大改变,而经复方蜥蜴散治疗1个月后,NO和iNOS水平恢复正常,胃黏膜病理组织学改善明显。结论:复方蜥蜴散可以逆转萎缩胃黏膜的病理改变,发挥保护胃黏膜的作用。     

超微柴胡疏肝散治疗慢性浅表性胃炎30例总结

目的：观察超微柴胡疏肝散与传统汤剂对慢性浅表性胃炎（肝胃不和型）的治疗效果。方法：治疗组30例采用超微柴胡疏肝散治疗，对照组30例采用柴胡疏肝散传统汤剂治疗。结果：两组总有效率和症状积分比较均无显著性差异（P〉0．05）。结论：两种剂型疗效相当，但超微剂型能减少用药量，节省药材。     

玉屏风散预防小儿反复呼吸道感染60例

目的:探讨玉屏风散预防小儿反复呼吸道感染(简称反复呼感)的疗效.方法:治疗组给予玉屏风散加味治疗,对照组百令胶囊治疗.结果:治疗有效率90.0%、对照组仅63.3%,有显著差异(P<0.05).结论:玉屏风能增强免疫功能,较有效地预防小儿反复呼感.     

Simultaneous Quantification of an Enantiomer and the Racemic Compound of Ibuprofen by X-ray Powder Diffractometry

Purpose. An X-ray powder diffractometric method was developed for the simultaneous quantification of the relative amounts of the racemic compound (±) of ibuprofen (I) and S(+)-ibuprofen (II), when they occur as a mixture. Methods. The X-ray powder diffraction patterns of I and II show pronounced differences. This formed the basis for the determination of the relative amounts of I and II when they occur as a mixture. X-ray lines with d-spacings of 14.41 and 4.37 Å were unique to I and II, respectively. Mixtures containing different proportions of I and II were prepared which also contained lithium fluoride (III) as an internal standard. Results. A linear relationship was obtained when the intensity ratio (intensity of the 4.37 Å line of II/intensity of the 2.01 Å line of III) was plotted as a function of the weight fraction of II in the mixture. Similar results were obtained in the case of I. Using these standard curves, the weight fractions of I and II in 'unknown' mixtures were determined. The experimentally determined analyte concentration ranged between 98 and 104% of the true value. The relative error in the analyses of individual samples was < 10%. The minimum detectable weight fraction of I in II and II in I were 0.032 (3.2% w/w) and 0.034 (3.4% w/w), respectively. The minimum quantifiable weight fractions were 0.136 for I and 0.112 for II. Since the X-ray diffraction patterns of S(+)-ibuprofen and R(–)-ibuprofen are identical, the conclusions drawn regarding mixtures of I and II will also hold true in the quantitative analyses of mixtures of I and R(–)-ibuprofen.     

强化婴幼儿奶粉中叶酸的测定

强化叶酸的奶粉在0.05M K_2HPO_4缓冲液中,经均质,调pH4.5,15000g离心20分钟,其清液调pH4.0,进行CGS树脂离子交换层析,用10ml KClK_2HPO_4洗脱,调pH7.0,进行HPLC测定,采用300x3.9mm ODS反相柱,移动相0.05M K_2HPO+MeOH(91+9),流速1ml/分,紫外检测器波长285nm,灵敏度0.0050D。方法相对标准偏差为±3.3％,回收率为87％,最小检测量为0.02μg/ml。     

微波等离子体化学气相沉积合成TiN超细颗粒

热力学计算表明，Ｈ２，Ｎ２的过量有助于提高ＴｉＮ的产率，但能耗也相应增加。为此考察了温度，流量，ＴｉＣｌ４携带量，混合方式对产物性能的影响。结果表明，流量增加，温度升高，ＴｉＣｌ４携带量增加，混合愈好，则产物粒径愈小。在此基础上采用微波等离子体化学气相沉积法，合成了粒径为１２３－２８４ｎｍ的ＴｉＮ超细颗粒     

超细α-FeOOH制备过程研究 Ⅰ.制备工艺

以制备晶形、粒度、轴比等满足高性能磁粉要求的铁黄为目标,研究了碱法超细α-FeOOH合成的工艺配方和工艺条件对粒子性能的影响,包括碱比、气量、转速、Fe(OH)_2结晶条件、熟化时间等工艺参数的影响规律。重复稳定地制备出三类超微粒α-FeOOH粒子,其粒度分别为0.18、0.28、0.39μm,分布均匀,无枝叉。     

运用模糊数学建立全脂乳粉卫生质量评价模型

本文运用模糊数学原理，对东台市１９９３年７月份市面上的全脂乳粉抽查监测结果进行卫生质量综合评价，结果令人满意，从而为乳粉卫生质量评比建立了客观有效的评价模型。     

早期鼻饲生大黄粉防治重型颅脑损伤后上消化道出血的临床研究

目的研究重型颅脑损伤后早期鼻饲生大黄粉对防治上消化道出血的作用.方法选择GCS3～8分重型颅脑损伤患者90例,随机选45例(实验组)伤后早期(24～48h)鼻饲生大黄粉,另45例(对照组)未予生大黄粉治疗.所有患者其他治疗措施均基本相同.结果39例患者出现上消化道出血.其中实验组14例,有13例上消化道出血治愈,治愈时间(7.6±2.5)d;对照组25例,有16例上消化道出血治愈,治愈时间(13.4±3.3)d.实验组上消化道出血率和上消化道出血治愈平均时间均显著低于对照组(P＜0.05),而上消化道出血治愈率显著高于对照组(P＜0.05).结论早期鼻饲生大黄粉能有效防治重型颅脑损伤后并发上消化道出血,值得临床推广应用.