直接法与统计法测试松质骨孔隙率的比较研究

目的 探讨松质骨孔隙率的测试方法。方法 对15根猪胫骨分别采用“直接法”与“统计法”测试松质骨孔隙率或其表观密度和材料密度。结果 （1）孔隙率与表观密度呈非常显著负相关,而与材料密度相关不显著;（2）孔隙率沿轴向靠近密质量骨逐渐减小,而沿横向基本不变;（3）统计法可测出松质骨各个层面的孔隙率大小。结论 直接法和统计法均能检测松质骨孔隙率,但统计法较直接法更能反映孔隙率的分布与变化规律。     

多动行为偏异儿童血5-羟色胺测定及其意义

目的　探讨心理卫生偏异 (简称行为异常 )多动行为偏异儿童 (简称多动 )与正常儿童血 5 -羟色胺 (5 -HT)含量差别。方法　用Achenbach儿童行为量表筛查并根据因子分分类对 30例行为异常儿童进行血 5 -HT含量测定 ,与 30例正常儿童对照组比较。结果　行为异常组血 5 -HT含量与正常组比较 ,无显著差异。而多动组与正常组比较 ,有显著差异 (P <0 .0 5 )。内向型因子组与正常组比较 ,有显著差异 (P <0 .0 5 )。结论　多动行为偏异儿童血 5 -HT含量明显降低 ,心理卫生偏异内向型组血 5 -HT含量明显升高。     

慢性肺原性心脏病病人血浆内皮素及降钙素基因相关肽水平的检测

目的：对不同临床分期慢性肺原性心及病病人血浆内皮素－1（ET－1）及降钙基因相关肽（CGRP）进行检测,方法：采用放射免疫法对标本进行测定,以呼吸系统急性感染病人的作为对照。结果：代偿期肺原性心脏病病人血浆ET－1水平显著高于对照组（P＜0．01）,而CGRP水平无差异,失代偿期病人ET－1水平显著高于代偿期病人（P＜0．05）,CGRP水平无差异,失代偿期病人ET－1水平显著高于代谢期病人（P＜0．05）,CGRP水平则显著低于代偿期病人（P＜0．01）,结论：ET－1及CGRP在慢性阻塞性疾病的发生和发展过程中起一定作用。且与疾病的严重程度相关。     

Ultrasound of femoral head cartilage: a new method of assessing bone age

This paper analyses the relationship between the thickness of the anterior femoral head cartilage (FHC), as measured by ultrasound, and some anthropometric parameters, such as height, weight, skeletal and chronological age. In addition, it provides standard norms for FHC thickness in a paediatric population. Both hips were examined in 213 consecutive subjects (99 boys and 114 girls), aged 1.9–14 years. Seventy-four subjects underwent hand and wrist X-rays for skeletal maturation: 32 of these were dropped from the study because a discrepancy as high as two standard deviations was found between their skeletal and their chronological age. The thickness of FHC correlated strongly with skeletal and chronological age, standing height and body weight. A side difference of 0.2 mm in FHC was considered to be abnormal. The study population was divided into 13 groups according to chronological age and values of FHC for boys and girls are provided for each group. It is suggested that the magnitude of hyaline FHC is a valuable feature in the evaluation of skeletal maturation in children.     

Experimental analysis of the human perception threshold of a DC electric field

To study the biological effects of extremely low frequency (ELF) electric fields, a fundamental study is conducted of the human perception threshold of an electric field. The perception threshold is measured with human subjects, and the results are analysed. It is clear that field perception is based on the movement of hair and not on other sensations. Variance in the perception threshold and its causes are investigated. The perception threshold decreases by almost 30% as the relative humidity increases from 50 to 90%. The perception threshold is also dependent on the physical condition (length and density) of the hair and the psychological condition (degree of awareness) of the subject. The dependence on these is much smaller than that on relative humidity. The cause of the gender difference in the threshold is ascribed to the difference in the physical condition of the hair. Through this study, some factors to be taken into account for the safety standard are made clear.     

甲苯咪唑微丸质量标准的研究

目的：建立对甲苯咪唑微丸进行定性鉴别和含量测定的方法。方法：采用薄层层析法进行定性鉴别,用紫外分光光度法进行含量测定。结果：含量测定方法平均回收率为１００．６％ , Ｒ Ｓ Ｄ＝ １．７２％ 。结论：所用方法简便可靠,可控制甲苯咪唑微丸的质量。     

HBV无症状携带者与ABO血型关系的探讨

目的：探讨ＨＢＶ无症状携带者与ＡＢＯ血型间关系。方法：采用Ｗｏｏｌｆ统计方法与卡方（ｘ＾２）检验方法对１７４例ＨＢＶ无症状携带者的ＡＢＯ血型分布以及男女性别的关系进行系统分析。结果：男性携带者血型呈Ｂ〉Ｏ〉Ａ〉ＡＢ型分布,女性携带者呈Ｂ〉Ａ〉Ｏ〉ＡＢ型分布。Ａ、Ｂ、Ｏ和ＡＢ血型人相对危险率分别是０．４８７０、２．０４１４、０．９６６８和１．７９５０。结论：ＨＢＶ无症状携带者与ＡＢＯ血型间存在一定关     

利用比数比统计的结果推断相对危险度RR=1、RR>1或RR<1

目的　试图用比数比 (OR)的统计结果得出相对危险度 (RR)是否等于 1的结论 ,由此病例对照研究也能得出 2个率是否相等的统计推断。方法　推导OR与RR的关系表达式。结果　证明了总体OR与总体相对危险度RR在等于 1、大于 1和小于 1处是一致的。结论　OR的统计检验结果和推断可以得出总体RR是否等于 1、大于 1或小于 1,而且P值相同 ,由此得到 2个率是否相等的统计推断。     

通过前房相关免疫偏离阻止实验性自身免疫前葡萄膜炎

目的 实验性自身免疫性前葡萄膜炎（ＥＡＡＵ）是研究人前葡萄膜炎的有用模型。本研究旨在观察前房相关免疫偏离（ＡＣＡＩＤ）能否阻止ＥＡＡＵ发生。方法 将溶于磷酸盐缓冲液（ＰＢＳ）的牛黑色素蛋白（ＢＭＰ）注射于大鼠右眼前房;对照组动物仅注射ＰＢＳ。７d后使用且加完全福氏佐剂（ＣＦＡ）的ＢＭＰ和百日咳毒素免疫所有动物。通过临床 观察和组织病理学检测葡萄膜炎的严重程度和发病率。通过由注射ＢＭＰ刺激的足垫水肿反