杜仲树皮生长理论及剥皮再生技术

介绍杜仲树皮次生生长过程及大面积剥皮再生新皮的起源、形成过程和树体生理反应。探讨影响仁仲剥皮再生的环境因子和加速剥皮再生，提高成海活率的主要技术措施。     

5种挺水植物对污水浸淹的生理反应及净水效果

以黄菖蒲(Iris pseudacorus)、梭鱼草(Pontederia cordata)、香蒲(Typha orientalis)、再力花(Thalia dealbata)、千屈菜(Spiked loosestrlfe)为材料,应用桶培试验研究了污水浸淹下5种挺水植物叶绿素(Chl.)、类胡萝卜素(Caro.)、超氧化物歧化酶(SOD)、丙二醛(MDA)、游离脯氨酸(Freepro.)等生理指标的变化,对水体总氮(TN)、氨氮(NH4+-N)、硝态氮(NO3--N)、亚硝态氮(NO2--N)、总磷(TP)和化学需氧量(COD)的去除效果进行了比较。结果表明:污水浸淹下,叶绿素含量尽管初期有所波动,但后期均表现为下降,类胡萝卜素也呈现类似的变化;浸淹15～30d,黄菖蒲和千屈菜2种植物体内SOD活性变化小,其余植物SOD明显下降,但浸淹45 d后5种植物SOD均上升;浸淹15～30 d,5种植物MDA含量变化不大,但浸淹45 d后,5种植物MDA含量明显升高;梭鱼草、黄菖蒲的游离脯氨酸含量变幅较大,其余植物的变动不明显。比较不同植物的生理反应,香蒲对污水胁迫的生理反应不敏感,对污水的适应性相对较强。从不同植物对试验水体的影响来看,再力花对TN的去除率最高(RTN=61.75%),香蒲对TP的吸收能力最强(RTP=87.50%),为优良的净水植物。     

“濒死体验”是大脑生理反应

英国科学家在对大脑感知进行研究后认为,所谓意识溢出体外的现象只不过是大脑理解死亡的方式。“灵魂出窍”的感觉是大脑对我们耍的“小花招”。     

羽毛球专项选手Y字型六拍、九拍测试的时空特征及生理反应研究

为探讨间歇有氧力竭训练对体育教育专业男子羽毛球专项选手的运动表现与生理反应的影响,选择从事男子羽毛球单、双打运动员各8名,先在跑步机上进行最大摄氧量测试,接着以平衡次序法分别让2组受试者完成羽毛球Y字型6拍、9拍现场有氧间歇力竭性测验.结果显示:单打组在6拍测试完成总时间、趟数和距离皆明显优于双打组,而每个6拍和Y字型的完成时间上单、双打无差异;9拍测验的所有运动表现指标单、双打无差异;单、双打组在6拍、9拍测验所获摄氧量、心率、乳酸、RPE用力感觉均无明显差异,但单打组在6拍测验时的摄氧量、乳酸、RPE增加程度均明显比9拍测验要小,而双打组在6拍测验时仅摄氧量上升的幅度比9拍的小.可见,单、双打羽毛球选手现场有氧力竭检测具有相同移动速度及生理反应,但单打选手有氧耐力和运动效率优于双打选手,在6拍、9拍测试时有更好的运动表现.     

Parametric study of control mechanism of cortical bone remodeling under mechanical stimulus

The control mechanism of mechanical bone remodeling at cellular level was investigated by means of an extensive parametric study on a theoretical model described in this paper. From a perspective of control mechanism, it was found that there are several control mechanisms working simultaneously in bone remodeling which is a complex process. Typically, an extensive parametric study was carried out for investigating model parameter space related to cell differentiation and apoptosis which can describe the fundamental cell lineage behaviors. After analyzing all the combinations of 728 permutations in six model parameters, we have identified a small number of parameter combinations that can lead to physiologically realistic responses which are similar to theoretically idealized physiological responses. The results presented in the work enhanced our understanding on mechanical bone remodeling and the identified control mechanisms can help researchers to develop combined pharmacological-mechanical therapies to treat bone loss diseases such as osteoporosis.     

植物也有头脑

早在18世纪,著名的瑞典植物学家林奈就指出,植物与人和动物的区别仅仅在于前者运动相对缓慢。德国诗圣歌德也曾说过,植物不同于人类,它朝两个方向生长,一端似乎受地球吸引力的影响,朝地下蔓延;另一端仿佛因某种“反吸引力”的作用,朝天上伸展。植物的运动有目的性直到20世纪初,     

Physiological responses of osteoblasts to cyclic stretching and the change of intracellular calcium concentration

The development of bone tissues is regulated by mechanical stimulation.Cyclic stretching was applied to the osteoblasts that were delivered from rat calvarie,The results showed that stretching at 500με increased the cell proliferation while loading at 1000με and 1500με inhabited cell growth ,Loading also increased the adhesive force between cells and substrate as well as spreading areas of osteobalsts.Furthermore,the fluorescence probe Fluo-3/AM was used to investigate the effect of stretching stimulation on the intracellular calcium concentration of osteoblasts.The intracellular calcium concentration of osteoblasts that were stretched at 500 με for 5 min was 92.9% higher than the control ,After being treated with the panax ontoginseng saponins,the streteched osteoblasts still expressed 28.6% higher intracellular calcium concentration than that of the control ,which proved that both the influx of extracellualr calcium and the release of intracellular calcium store were involved in the increase of intracellular calcium concentration when osteoblasts responded to the cyclic stretching And the influx of extracellular calcium through transmembrance channel played a main role.     

低温下被动的运动前身体加温对高强度运动中生理反应的影响

本文针对运动前身体的温度提高而引起的一系列生理反应有利于运动成绩的提高作了一些证明．对温度作了设定,测试最大摄氧量与乳酸浓度．结果表明,被动的身体加温比低温暴露实验中的血乳酸浓度低．呼吸交换比率（RER）的运动中最大值PW实验比CE实验显示有意低值．运动中的心率平均值,PW实验比CE实验显示有意高值．运动中的主观性工作强度（RPE）平均值,PW实验比CE实验显示有意低值．     

不同性别人体皮肤摩擦不舒适度感知功能的研究

利用人体生理和心理反应反馈信号研究了不同性别人体前臂掌侧皮肤在不同法向加载摩擦条件下的不舒适度感知能力.试验在UMT-II多功能摩擦磨损试验机上进行,相应的生理反应信号:皮肤温度、电容以及脑电波利用NeXus-10生理反馈仪进行同步采集及定量分析;皮肤感知的心理信号借助于摩擦过程中受试者对疼痛、牵扯和灼热的感觉程度进行量化记分.结果表明:皮肤的摩擦系数在性别之间无显著性差异;女性皮肤的温度及电容普遍高于男性,但温度及电容在摩擦开始及结束时的差值在性别之间无显著性差异;女性脑电波幅值及高幅值波峰数大于男性;相应的女性在摩擦过程中不舒适的心理反应强于男性;所有受试者在摩擦过程中的不舒适感均随时间的延长及载荷的增大而增强.     

杨树抗旱能力及生理反应试验研究

本文利用扦插苗对6个杨树品种进行抗旱指标与生理反应研究,确定了各品种的土壤含水率范围,对各树种抗旱性进行了定量评价,为杨树新品种推广利用提供科学依据。