在钙原子共振滤波器中主动波长转移方法的应用

本文介绍了在进行原子共振滤波器方案设计时的主动波长转移的原因和方法，并介绍了主动波长转移的方法在Ｃａ－ＡＲＦ方案设计中的应用。     

Calcium pretreatment increases thermotolerance of Laminaria japonica sporophytes

Calcium is a secondary messenger in plant signaling,and its concentration changes spatially and temporally during the course of heat stress.In the present study,potassium antimonate was used to visualize calcium localization in blades of a marine macroalga,the juvenile Laminariajaponica sporophytes under heat stress (25 ℃).Result showed that loosely bound calcium was mainly distributed on the cell wall under normal conditions (10 ℃),and flowed into the cytoplasm when exposed to heat.The simutaneous assay on the antioxidant system changes was performed.Oxidative damage,as measured by generation of reactive oxygen species (ROS) malondialdehyde (MDA) content,increased significantly during heat stress,and calcium pretreatment alleviated oxidative damage.The assay on the activities of six antioxidant enzymes demonstrated that their enzymatic activities were inhibited when exposed to heat stress,but Ca2+ pretreatment effectively attenuated the inhibition.Results in the present study inferred that calcium homeostasis plays an essential role in L.japonica sporophyte when exposed to heat,and calcium pretreatment could improve its thermo-tolerance.     

Calcium pretreatment increases thermotolerance of Laminaria japonica sporophytes —Using Yaluhe farm as an example

Calcium is a secondary messenger in plant signaling, and its concentration changes spatially and temporally during the course of heat stress. In the present study, potassium antimonate was used to visualize calcium localization in blades of a marine macroalga, the juvenile Laminaria japonica sporophytes under heat stress (25℃). Result showed that loosely bound calcium was mainly distributed on the cell wall under normal conditions (10℃), and flowed into the cytoplasm when exposed to heat. The simutaneous assay on the antioxidant system changes was performed. Oxidative damage, as measured by generation of reactive oxygen species (ROS) malondialdehyde (MDA) content, increased significantly during heat stress, and calcium pretreatment alleviated oxidative damage. The assay on the activities of six antioxidant enzymes demonstrated that their enzymatic activities were inhibited when exposed to heat stress, but Ca2+ pretreatment effectively attenuated the inhibition. Results in the present study inferred that calcium homeostasis plays an essential role in L. japonica sporophyte when exposed to heat, and calcium pretreatment could improve its thermo-tolerance.     

钙的光度分析近况

评述了近十年（１９８４～１９９４）钙的光度分析进展，包括钙的新显色试剂、新体系以及有关新的分析技术在钙光度分析测定中的应用。     

黑龙江鸡西煤矸石中镁、钙、铁、钛的测定

煤矸石是采煤过程和洗煤过程中排放的固体废物.是一种在成煤过程以及煤层开采过程中伴生的一种含碳量较低、比煤坚硬的黑灰色岩,是碳质、泥质和砂质页岩的混合物.相对于煤岩来说它们的发热值偏低.主要成分是氧化铝、氧化硅,另外还含有数量不等的氧化铁、氧化钙、氧化镁、硫等和微量稀有元素(钛、镓、钒、钴).对黑龙江鸡西煤矿的煤矸石进行了氧化镁,氧化钙,氧化铁,氧化钛成分的分析测量,同时对黑龙江省煤矸石的综合利用提出了参考性建议.     

模拟酸雨胁迫下Ca^（2＋）对葱兰（Zephyranthes candida）的调控作用

探讨不同pH模拟酸雨对葱兰主要生理特性的影响及Ca2＋的调控作用。通过盆栽试验,研究10mmol/LCa（NO3）2处理后不同pH（2.0、2.5、3.0、4.0和5.6）模拟酸雨胁迫对葱兰的有机物代谢、膜系统稳定性、抗氧化酶活性、叶绿素（Chl）及气体交换参数的影响。结果表明：随着pH的降低,葱兰叶片相对电导率（γ）、丙二醛（MDA）和超氧化物歧化酶（SOD）逐渐升高,可溶性蛋白、可溶性糖含量和过氧化物酶（POD）逐渐下降;Chl和净光合速率（Pn）随pH的降低而降低,气孔导度（Gs）和胞间CO2浓度（ci）先随pH的降低而升高,当pH 2.0时显著降低;在pH≤4.0时,可溶性糖与pH呈显著正相关,SOD和Pn均与pH呈显著负相关。同一强度酸雨胁迫下,经10mmol/L Ca（NO3）2处理后,葱兰叶片中可溶性蛋白、可溶性糖、POD、SOD、Chl和Pn均有不同程度的升高,γ和MDA显著降低,且各指标的变化随pH的降低变化不明显。模拟酸雨胁迫下,Ca2＋能增强葱兰各项生理功能的稳定性,从而减轻酸雨对葱兰的伤害,试验还发现,Ca2＋对葱兰的调控作用在强酸度（pH≤3.0）胁迫下,效果更明显。     

用于欧拉数值模拟的改进T-T吸收剂固硫模型

为了实现循环流化床反应器中的中温多相流动脱硫反应过程的数值模拟,将T-T吸收剂的固硫模型引入到欧拉双流体模型中。但表征T-T吸收剂固硫特性的钙转化率是时间的函数,不能作为状态参数使用。为此,通过数据转换,将钙转化率对时间的导数,即吸收剂的反应速率与钙转化率建立了相互关系。同时发现,反应速率与钙转化率的平方之间具有分段线性的特征,由此获得了改进的T-T吸收剂固硫模型。进一步推导出钙转化率的输运方程,从而封闭了欧拉双流体反应方程组,为模拟烟气脱硫反应过程提供了理论基础。     

稀土添加剂对电沉积磷酸钙涂层的影响

采用电化学沉积的方法在钛合金(Ti-6Al-4V)表面制备生物涂层.通过加入添加剂稀土硝酸镧和氧化钇制备了两种磷酸钙盐/稀土复合涂层.试验研究了稀土对涂层的微观形貌及涂层厚度的影响.结果表明:稀土的加入使涂层变得更为均匀致密.与单一涂层相比,稀土盐的添加有效的提高了涂层的厚度.XRD分析表明,稀土的加入并没有影响磷酸钙的生成.