The Physiological Effects of Germanium Dioxide on the Germinating Rice Seeds

将水稻（OryzASATIVAl.）种子浸于从0到3Mg·l-1不同浓度梯度的gEO2溶液中，测量其生理指标：呼吸强度，可溶性糖含量，淀粉酶活性等。发现在浸种的前期，gEO2对以上各项生理指标均有促进作用，而随着浸种时间的延长，促进逐渐减弱并转为抑制，淀粉酶同功酶电泳则表明，植物体内复杂多样的同功酶系统在一定范围内对gEO2的毒害作用有某种程度的适应与调节能力Rice seeds were soaked in solutions with diffrent concentrations of GeO 2 ranged from 0 to 3.0 mg·L -1 .Respiratory intensity,quantity of soluble sugar and activity of amylase were tested during germination.It was shown that GeO 2 promoted all the indexes in the first stage of germination, but the promotive effect was decreasing late and at last GeO 2 became inhibitive.Isoenzyme of amylase was analyzed by PAGE.The results showed that the newly appeared isoenzyme of amylase in the germinating rice seed can releave the toxicity of GeO 2

Physiological Reaction on Atmospheric Pollution to Several Common Plants

研究了3种常见木本植物芒果、银桦、台湾相思树,以及1种盆栽植物紫花鸭跖草,对大气中SO_2暴露的生理反应。对供试植物叶片进行了可溶性糖和过氧化物酶活性的测定。结果表明,当大气中SO_2浓度较高时,植物叶片中过氧化物酶活性也较高,可溶性糖含量则降低,说明大气中SO_2浓度越高,对植物生长受到的伤害也越大。The activity of peroxidase and the content of soluble sugar in the leaves of Four plant species From diFFerent regions were determined.The results showed that the activity of peroxidase was positively and the content of soluble sugar was negatively correlated to the concentration of SO2 in atmosphere respectively.This implied a theoretical basis For Further appraising the environmental quality.自然科学基金资助项

The Effect of Ge and Si on the Growth and Development of Rice

用0~3.0Mg/l浓度gEO2对水稻种子浸种处理之后，在木村b培养液中培养，并分别以6个浓度继续添加gEO2溶液.另用不同浓度的gEO2和SIO2混合溶液培养水稻，测定其营养生长期的整株鲜重、根鲜重、地上部高、叶绿素含量、根系活力以及叶过氧化氢酶（CAT）、叶多酚氧化酶（PPO）、根过氧化物酶（根PO）和叶（PO）.实验表明，随着培养时间延长，上述生理指标值有所变化，其中前6项正常生理指标值，随着gEO2浓度提高而减少，后3项衰老指标则随着gEO2浓度提高而有增加趋势，表明3种酶活性的提高以缓解gEO2对水稻的毒害作用.各生理指标与gEO2浓度之间呈明显相关关系.同时，还发现了一定浓度的gEO2对水稻生长有抑制和毒害作用，而较高浓度的SIO2可适度缓解该抑制作用.Affer soaking in the GeO 2 solution of 0￣3.0 mg/L, some rice seeds are cultured in the solutions with six diffrent concentration of GeO 2 and SiO 2.The fresh weight of all plant, fresh weight of the root stock, plant height, chlorophyll contain; activity of the root, cetalase activity of teaf, polyphenoloxidase of root, and perosidase of root and leaf were studied during the growth and development period.The results shows that these nine physiological indexes are increasing with the culture going on.The former six indexes decrease with increasing the concentration of GeO 2 in culture.but the latter three aged indexes increase with increasing the concentration of GeO 2, indicating that the activity of these three kinds of enzyme are enhancing to defy the inhibition of GeO 2 to a certain degree.At the same time, high concentration of SiO 2 is thought to be a way to ease the inhibition of GeO 2

带非吸收窗口的大功率657 nm半导体激光器

在激光器腔面处制作非吸收窗口(NAW)可以有效地减少光吸收,防止激光器过早出现光学灾变损伤(COD),是提高大功率半导体激光器的功率特性的重要手段之一.采用金属有机化学气相沉积(MOCVD)技术二次外延生长了大功率657 nm红光半导体激光器结构,通过闭管扩散Zn的方法在腔面附近制作了非吸收窗口.实验发现扩散温度550 ℃,扩散时间20 min时,得到的非吸收窗口最为有效,激光器连续工作的无扭折输出功率大于100 mW,超过常规的无窗口结构激光器的最大输出功率的两倍,激光器的斜率效率提高了23%.测量该类器件的温度特性发现,环境温度为20～70 ℃时,其输出功率均可大于50 mW,计算得到激光器的特征温度约为89 K,波长增加率约为0.24 nm/℃

饲料对东北林蛙蝌蚪生长发育影响的研究

2008年3月29日～5月26日,在佳木斯市某东北林蛙养殖场,采用2组饲料饲喂东北林蛙蝌蚪,蝌蚪分为A组和B组。结果表明:饲喂T1组饲料的蝌蚪41期和46期时的体重、体长和尾长明显大于饲喂T2组饲料的蝌蚪;各组蝌蚪的成活率均在95%以上,各组蝌蚪完成变态的时间差异不显著;T2组饲料的利用率要低于T1组