Preliminary Studies on the Absorbance Ratio Method Used to Determining the Age of Stamp‐pad Ink Seal

Stamp‐pad ink seals are often placed on important documents, and determining the dating of stamp‐pad ink seal is important to assess the authenticity of a document. In this study, 20 different brands and types of stamp‐pad inks were classified by ultraviolet visible spectrophotometer. Six different brands and types of papers were classified by micro‐Fourier transform infrared spectrometer and visual spectral comparator 6000. Three different brands of stamp‐pad inks and two different types of paper were used to make diachronic samples of the seals. A method was employed to date the stamp‐pad seals by comparing absorbance ratios and inks of known age. Curves were created to show the relationship between the absorbance ratio of ink and the age of the seals. The experimental results showed that the absorbance ratio method was applicable for the relative dating of stamp‐pad ink seals in some cases where the seal was placed on the document within 10 weeks.     

大豆异黄酮改善阿尔茨海默病大鼠学习记忆能力的机制

目的 探讨大豆异黄酮(soybean isoflavones，SIF）改善阿尔茨海默病（Alzheimer''s disease，AD）大鼠学习记忆能力的机制。方法 将70只大鼠随机分为正常对照组，假手术组，模型组，雌激素组和高、中、低剂量SIF治疗组，采用右侧杏仁核注射β-淀粉样肽（β-amyloid peptide，Aβ）25-35复制AD大鼠模型，给予不同剂量的SIF，通过检测逃避潜伏期、游泳时间百分比和2 min内穿过平台次数评价大鼠学习记忆能力，观察并比较各组大鼠海马胆碱乙酰转移酶（choline acetyltransferase，ChAT）活性和半胱天冬氨酸特异性蛋白酶3（cysteinyl aspartate specific protease-3，caspase-3）的活性。结果 与模型组比较，高、中、低剂量SIF组逃避潜伏期显著降低(P<0.01），游泳时间百分比和穿过平台次数显著增加（P<0.01），高、中剂量SIF组大鼠海马ChAT活性显著升高(P<0.01），各剂量SIF组AD大鼠海马caspase-3活性显著降低（P<0.01）。高、低剂量SIF组逃避潜伏期、2 min内穿过平台次数、ChAT活性和caspase-3活性比较，差异具有统计学意义（P<0.01）。结论 大豆异黄酮通过调节AD大鼠海马ChAT和caspase-3活性，改善其学习记忆能力，并呈现一定的量效关系。     

针灸改善海洛因依赖者睡眠障碍和焦虑情绪35例

目的 观察针灸对海洛因依赖者睡眠障碍和焦虑情绪的改善作用.方法 将62例男性海洛因依赖者分为对照组(27例)和针灸组(35例).针灸组针刺百会、内关、神门穴,留针30 min;同时,艾灸足三里穴,每次30 min,每周2次,共8周.对照组不接受任何治疗措施.采用焦虑自评量表(self-rating anxiety sc...