Effects of Root Salt Stress on Growth and Allocation of Mineral Elements in Halophyte and Glycophyte Seedlings

为了解盐胁迫对植物的影响,研究了根系nA Cl胁迫在温室条件下对盐生植物榄仁(TErMInAlIA CATAPPA)和甜土植物枇杷(ErIObOTryA JAPOnICA)幼苗生长、矿质元素和灰分含量的影响。结果表明:在根系盐胁迫下,两种植物幼苗的叶片病斑多分布于中心区,灰分含量增加,幼苗的nA+-Cl–呈极显著的正相关关系,盐胁迫对两种植物幼苗的5种矿质元素(CA2+,Mg2+,nA+,k+,Cl–)含量影响不大,但它们在植物中的分布发生了变化。可见,盐生植物和甜土植物抗盐性的区别是量上的不同,没有质的差别。In order to understand the effect of root salt stress on seedlings, the growth, mineral elements and ash contents in halophyte Terminalia catappa and glycophyte Eriobotrya japonica seedlings were studied in greenhouse.The results showed that the spots mainly distributed on center of two seedling leaves under root salt stress, and ash content increased.There was significant positive relationship between contents of Na+ and Cl– after root salt stress.The contents of mineral elements(Ca2+, Mg2+, Na+, K+, Cl–) in seedlings varied little, but their distribution in seedlings happened to change.So, there is quantitive difference between halophytes and glycophyte under salt stress, and no qualitative difference.林业科技支撑计划项目(2009BADA2B0605); 福建省科技重点项目(2013N01010365); 漳州市科技重点项目(ZZ2014036)资

伏安法实验数据子波信息提取方法的研究

从实际测得的伏安法实验数据出发 ,分析研究了伏安法标准加入浓度曲线 (子波 )的提取方法。从分析子波畸变的特征入手 ,结合基于奇异值分解原理的TLS算法 ,提出了一种两组份浓度子波峰形的相关滤波叠代求解方案

Studies on the acquiring method for the son-wave of experimental data in voltammetry

分析研究了伏安法标准加入浓度曲线 (子波 )的提取方法 .从分析子波畸变的特征入手 ,结合基于奇异值分解原理的TLS算法 ,提出了一种两组份浓度子波峰形的相关滤波叠代求解方案 .The acquiring method for the son-wave (standard addition's) of experimental data in voltammetry has been discussed in this paper. By feature-recognizing for the son-wave's distortion and applying of TLS algorithm,one related filtering algorithm is presented

Study of the Characteristic and Parameters of Semiconductor Material

提出超晶格 (Al As/ Ga As)和应变超晶格 (Gex Si1-x/ Si,Inx Ga1-x As/ Ga As)光伏效应的机理 ,测量了不同温度下的光伏谱 ,光伏曲线反映了台阶二维状态密度分布并观察到跃迁峰 .计算了导带和价带子带的位置和带宽 ,根据宇称守恒确定光跃迁选择定则 ,对跃迁峰进行指认 .研究了光伏随温度变化、激子谱峰半高宽随温度和阱宽的变化 ,讨论谱峰展宽机制中的声子关联 ,混晶组分起伏及界面不平整对线宽的影响 .测量了元素和化合物半导体单晶材料的室温、低温下的表面光电压谱 ,推导了有关计算公式 ,计算得出电学参数 (L、n0 、μ、S、W)、深能级和表面能级位置、带隙和化合物组分 ;分析了电学参数的温度关系 ;由双能级复合理论 ,研究了少子扩散长度与深能级关系 ,计算了深能级浓度和参数 .在不同条件下研制了二氧化锡 /多孔硅 /硅 (Sn O2 / PS/ Si)和二氧化锡 /硅 (Sn O2 / Si) ,测量了它们的光伏谱 ,分析表明它们存在着异质结 .当样品吸附还原性气体 (H2 、CO、液化石油气 )时 ,光电压有明显变化 ,因此可做为一种新的敏感元件 .分析了它们的吸附机理 ,计算了有关参数The mechanism of the photovoltaic effect for superlattices(AlAs/GaAs) and strained superlattices(Ge xSi 1-x /Si,In xGa 1-x As/GaAs)are discussed. The photovoltage spectra at different temperatures have been measured. The curves of SPV reflect the step like distribution of two dimensional state density, and transition peaks have been observed. The levels and bandwidths of the subbands have been calculated. The transition speaks are assingned according to the selection rule for optical transition based on the conservation law of parit. The changed in photovoltage with temperature, the full width of half maxium of the transition peaks as a function of temperature and well width for different samples are investigated. The influences of exciton phonon coupling, alloy disorder and interface roughness on the broading mechanism of the transition peaks are discussed. The surface photovoltage of element and compounds single crystal semiconductors are measured at room and low temperatures. Some calculation formules are derived. The electrical parameters (L,n 0,μ,S,W),deep levels and surface level, energy gap and composition of the compounds are determined. The temperature dependence of the electrical parameters are analyzed. The dependence of minority carrier diffusion length on deep level are studied by double level recombination theory. The concentration and parameters of deep levels are calculated. Tin Oxide/Porous Silicon/Silicon(SnO 2/PS/Si)and Tin Oxide/Silicon are fabricated at different conditions. The photovoltage spectra of SnO 2/PS/Si and SnO 2/Si have been studied. It is shown that there exist heterojunctions in SnO 2/PS/Si and SnO 2/Si. The photovoltage changes evidently when the sample absorbes reducing gas (H 2,CO,liguified petroleum). The experimental results indicate that SnO 2/PS/Si or SnO 2/Si is a good material for gas sensor. The mechamism for the gas absorption of SnO 2/PS/Si and SnO 2/Si are discussed. The parameters are calculated.国家自然科学基金资助项目!(技准 36 1号 ;6 86 6 0 52 ;;59172 10 1) ;; 教育部科研资助项目 ;; 福建省自然科学基金资助项目!(F950

营口市城市及村镇聚落增长与土地利用变化的模拟预测

基于辽宁省营口市1988、1992、1997、2000和2004年5期Landsat TM卫星遥感影像数据,利用城市增长和土地利用变化模拟模型SLEUTH模拟预测了6种预案(当前趋势预案、无保护预案、适当保护预案、管理增长预案、生态可持续预案和区域及城市规划预案)下2005-2030年营口市城市及农村聚落的增长和土地利用变化情况.结果表明:1988-2004年,营口市城市及村镇聚落的增长面积为14.93 km~2;1997-2004年,研究区水域、园地、矿山、耕地等土地类型面积的变化较大.2005-2030年,生态可持续预案下,营口市城市及村镇聚落的面积将缓慢增长,较好地保护耕地、林地等资源,但在一定程度上将限制城市及村镇聚落的增长;无保护预案下研究区城市及农村聚落的增长速度最快,耕地流失面积较大;当前趋势预案下,耕地流失面积与无保护预案相近,但耕地流失的格局不同;适当保护预案和管理增长预案下,耕地的流失面积较小;区域与城市规划预案下,城市及村镇聚落增长主要分布在城市开发区和城市周边地区.利用不同预案下的SLEUTH模型可以模拟不同土地管理政策对城市及村镇聚落增长和土地利用变化的影响,对我国实施统筹城乡发展、建设社会主义新农村具有指导意义

Optimation of Structure and VeriFication of SHG Function For Organometallic Complex Crystals

提出了二次谐波效应的二次极化率矢量模型并介绍该模型的要点、该类型晶体材料的电子结构和分子结构的优化以及综合反映晶体倍频效应的物理量-二次极化强度方均值P--2（2ω），为探索和研制该类型的晶体材料提供一定的线索。In order to explore systematically new organometallic complexes exhibiting large second harmonic generation eFFect and comprehensive good properties,it is neccessary to probe deeply into the relationship between the property and the structure,so we has been advanced second order palarizability vector medel.This paper disccusses emphatically the main points of the vector model,the optimation of electronc structure and molecular structure For organometallic complex crystals,and mean square of the second order polarzabitity which reFlect synthetically the Frequency doubling eFFect of the crystal.Base on the discussion we provide the inFormation For the exploration and development of the this types crystal materials.国家自然科学基金;福建省自然科学基

Progress in the Studies of Crystal Structures and Second Harmonic Generation of the Group ⅡB Metal Halide Adducts

某些具有倍频活性的有机分子如硫脲和3-甲基-4-硝基吡啶n-氧等易与Ⅱb族金属卤化物形成加合物，并呈非心对称晶体结构和有希望非线性光学材料。本文着重总结这些加成物特别是一维配位聚合物的结构特征和倍频性能并展望其研究前景。Studies of addition compounds of group ⅡB metal halides with some organic molecules aim at building acentric crystal structure For potential nonlinear material based on the encapsulation of organic chromophores as the thiourea and 3-methyl-4-nitropyridine N-oxide etc.in inorganic host matrices.This review presents recent developments in study of their crystal chemistry and experimental Frequency-doubling eFFect and Focuses on the correlation between the structure Feature and the second harmonic generation of one dimensional coordination polymers

黄土高原综合治理试验示范区航空遥感监测试验研究

本课题属“七·五”科技攻关项目《黄土高原综合治理》（75-04-03-15）研究内容之一。1、成功地进行了水土流失综合治理大范围（跨越了两个生物气候带，分布于5省区中的11个试验示范区）大比例尺彩红外航空遥感监测，提出了有关参数的选定原则。2、综合应用了目视判读、光学处理、机助分类与制图等遥感信息提取技术，初步形成了一套独具特色、且适用于地形复杂地区的遥感图象处理方法。3、首次设计和建立了以大比例尺信息源为基础、并直接为小流域综合治理服务的信息系统，共建立了76个原始数据库，采集了55bit属性数据，150兆图形和图象数据，编写了232个专业程序，170个说明、解释、提示文件。4、以遥感影像分析和综合治理信息系统为基础，建立了水土流失综合治理评级系统，首次设计和编制了《综合治理评价图》，即能定位、定量、形象地显示了小流域综合治理现状、又能表明进一步治理方向的重点和方向