高压氧对老年小鼠记忆力及脑内Ca~(2+)的影响

观察常压（１０１．３ｋＰａ）及高压（２５３．３ｋＰａ）吸氧处理后老年小鼠学习记忆的改善情况,并测定４个主要脑区（皮层,海马,小脑,间脑）突触体内钙离子浓度,结果表明,常压及高压吸氧可明显增强老年小鼠在新异的自我活动能力,并且显著提高记忆保持力,对衰老引起的脑内高下现象具有明显的抑制效应,其中２５３．３ｋＰａ高压氧降钙效果更明显,脑内高钙与记忆衰退密切相关,提示高压氧可能是通过降钙作用而改善脑老化而     

Increasing calcium intake in young women through gain-framed,targeted messages: A randomised controlled trial

Background: Adequate calcium consumption during early adulthood can help prevent osteoporosis in women.

Purpose: The effects of gain-framed, targeted messaging on calcium intake were examined over 12 months.

Methods: Young women (18–19 years) not consuming sufficient calcium were randomly assigned to receive standard care materials (control) or gain-framed, targeted materials (experimental). Health belief model (HBM) constructs, calcium intake and markers of bone formation, resorption and bone mineral density were assessed at various time points throughout the year.

Results: Calcium intake increased significantly more in the experimental versus the control condition (p?<?0.01). Self-efficacy was the only HBM construct to improve significantly more in the experimental condition versus control (p?=?0.05). The HBM did not mediate changes in calcium intake. Measures of bone health did not differ between conditions by the end of this nonpharmacological intervention (p's?>?0.05).

Conclusions: It is possible to increase young women's calcium consumption through gain-framed, targeted messages.     

Some new features of interface roughening dynamics in paper-wetting experiments

Some new observations concerning the spatial-temporal dynamics of selfaffine interfaces formed in paper-wetting experiments are reported. We find that the motion of the wet front in a porous medium has a stepwise nature. The height of the wetted area, as a function of time, displays a Devil's-staircase-like behaviour with scaling exponent delta, whereas the front width oscillates erratically with time. These erratic oscillations possess a statistical self-affine invariance in time with the scaling exponent chi, which is found to be equal to the growth exponent beta. We also note that the values of chi, beta and delta, as well as the interface roughness (Hurst) exponent H vary from one experiment to another in wide ranges, and that their distributions obey a normal distribution. The mean values of all the exponents are dependent on the paper structure, but not on the environmental conditions. Furthermore, we find that the mean value of beta depends on the interface front orientation with respect to the fibre direction in the paper, whereas the mean values of H and delta do not depend on it.     

从中药介入治疗肝癌看中医药的继承与发展

中药在肝癌介入治疗中已显示出令人鼓舞的作用,从这一成功范例中我们看到继承传统中医特色和优势,走中西医结合、多学科参与融合之路,才能推动和实现中医药的跨越式发展.     

汉语多义单字词的识别优势效应

运用词汇判断、简单命名及辨别命名任务,考察汉语多义单字词的识别优势效应。结果显示,在三个任务中均发现了显著的多义词识别优势效应。在词汇判断和简单命名任务中,多义词识别的优势效应表现在低频词中;在辨别命名任务中,多义词识别优势效应同时表现在高、低频词中。实验结果支持了PDP模型,讨论了多义词识别优势效应产生的机制