膜荚黄芪毛状根中异黄酮成分的反相高效液相色谱分析

对膜荚黄芪毛状根中6种异黄酮成分进行了反相高效液相色谱法测定。色谱柱为NucleosilC₁₈柱,流动相为甲醇—水(3∶2和3∶1,v/v),检测波长为254nm和280nm。6种异黄酮成分为:10-羟基-3,9-二甲氧基紫檀烷,(3R)8,2’-二羟基-7,4’-二甲氧基异黄烷,芒柄花素(7-羟基-4’-甲氧基异黄酮),8,3’-二羟基-7,4’-二甲氧基异黄酮,2’-羟基-3’,4’-二甲氧基异黄烷-7-O-葡萄吡喃糖甙,毛蕊异黄酮(7,3’-二羟基-4’-甲氧基异黄酮)。异黄酮浓度在2.5～12.5μg范围内与峰面积有良好的线性关系;加样回收率为96.47%～103.33%;精密度试验相对标准偏差为2.57%～6.52%;测得黄芪毛状根中6种异黄酮成分的含量在0.0005%～0.0065%之间。     

Quantitative analysis of the tomographic technetium-99m MIBI (99mTc-MIBI) myocardial bullseye display: Application to diagnosis of coronary artery disease

Summary In this study, the^99mTc-MIBI myocardial bullseye display of 31 healthy persons and 34 patients with myocardial ischemia and 17 patients with myocardial infarction were analyzed quantitatively, and compared with the results of myocardial tomography analysis and qualitative bullseye analysis. The sensitivities of the three methods were 88.2%, 91.2% and 94.1% respectively (P>0.05), and the specificities were 93.5%, 83, 9% and 83.9% respectively (P<0.05). On the other hand, the quantitative analysis obviously outperformed the other two methods in the detection of ischemic segments of myocardhum near infarction zone (P<0.01). The quantitative analysis of^99mTc-MLBI myocardial bullseye (quantitative bullseye) was an objective, specific and sensitive method for diagnosis of coronary artery disease.     

实验性糖尿病大鼠肝,肾,心,脑脂肪酸代谢的动态变化

报道对链脲佐菌素（STZ）诱导的实验性糖尿病大鼠几种重要脏器（肝、肾、心、脑）卵磷脂、脑磷脂中脂肪酸构成的变化。不饱和脂肪酸变化的模式（C18：2n-6，C20：3n-6，C22：5n-3，C22：6n-3增加，C20：4n-6降低）基本相同，改变的先后顺序是肝→心、肾→脑。     

氩激光治疗中心性浆液性脉络膜视网膜病变

应用氩绿激光光凝治疗中心性浆液性脉络膜视网膜病变36例41只眼。结果视力≥1.0者从术前的17.1％增加到术后的63.5％,而视力≤0.6者从术前的61％降低到术后14.6％,术后1周至1月,多数患眼视网膜下液全部吸收,部分患眼中心凹反光重显。结果还显示术后视力与病程长短有关,但术后视力与渗漏点的方位、渗漏点中心凹距离以及神经上皮脱离的大小无关。     

粮谷尘致肺损害的实验研究

粮谷尘为混合性粉尘，含游离ＳｉＯ２９．７７％，分离培养出普通高温放线菌。染尘动物肺脏早期病变主要为小灶性肺泡炎、灶性间质性肺炎、异物肉芽肿等，大、中支气管壁脱颗粒肥大细胞增多。９０ｄ以后，上述病变明显减少，但逐渐出现少数小的细胞结节，间质轻度纤维组织增生、支气管慢性炎症和小叶中央型肺气肿样病变，观察１ａ（年）未见明显纤维化。     

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     

The fit of fixed partial dentures joined by infrared soldering.

This study determined the accuracy of fit of three-unit fixed partial dentures joined by an infrared soldering technique compared with one-piece fixed partial denture castings and individually cast crowns. Wax patterns of prepared Ivorine teeth, maxillary left central incisor and maxillary left canine, were injection molded; a plastic rod was used as a pontic. One group of patterns was cast as one-piece dentures; the other group was sectioned in the connector area, cast individually and then joined by infrared soldering. Castings were seated on their respective dies, embedded in epoxy resin, and sectioned. Gap distances between the casting and the die were measured at specified marginal sites with a profile projector. Results showed that the fit of infrared-soldered fixed partial dentures was significantly better than that of one-piece castings and was comparable with the fit of single crowns. The gap openings measured in all castings were within the range of clinical acceptability.     

鼻咽癌病因学的病例—对照研究

本文以病例—对照的方法探讨了在黑龙江省与鼻咽癌发生有关的危险因素。调查鼻咽癌病例及对照共127对。在单因素与条件Logistic回归分析中均表明幼儿期食咸鱼(OR=5.5, χ²=4.92, P<0.05)及长期生活在烧煤的环境中(OR=1.894, χ²=4.655, P<0.05)可能与鼻咽癌的发生有关。此外,条件Logistic回归分析还发现,鼻窦炎病史也可能与鼻咽癌的发生有联系(B=1.385, exp(B)=3,995, P<0.1)。在对病例及对照的一级亲属患恶性肿瘤情况的调查中发现,鼻咽癌病例组有肿瘤家族史者多于对照组,其差异有统计学意义(χ²=10.32, P<0.01)。     

胚胎颅骨骨膜移植修复髋关节软骨大面积缺损

１９９０年５月～１９９４年４月，对４２例（４７个髋）关节软骨全厚缺损患者采用冷冻保存胚胎颅骨骨膜移植进行修复，其中１４例股骨头骨质Ⅳ期坏死者，同时施行带旋髂深血管蒂髂骨植骨。对３４例（３８个髋）进行了２年～６年（平均４０个月）随访。结果表明，按照吴之康髋关节人工置换术后疗效评定标准，优良２５例，很好５例，好３例，尚可１例。认为，与自体移植物修复关节软骨大面积缺损相比，这种方法无附加损伤，具有移植材料、形态与股骨头相似等特点，是治疗髋关节软骨大面积缺损的一种有效方法。