Response of Photosynthetic Apparatus to Different Irradiance in Flag Leaves of High-Yielding Winter Wheat PH01-35 Grown under Low Light Conditions

为了解弱光下生长的小麦叶片在不同光强下PS II和光合电子传递链的工作状态,解释其突然转入强光下时发生光抑制和光破坏的原因,以PH01-35为材料,采用大田人工遮光的方法,测定了小麦旗叶叶绿素含量、光合特性参数及快速光曲线。弱光处理15 d后,旗叶叶绿素含量明显上升,净光合速率、光补偿点、光饱和点、表观量子效率、羧化效率均出现不同程度的下降。与250μMOl M-2 S-1的弱光适应3 H相比,1 200μMOl M-2 S-1的强光适应3 H后,弱光下生长叶片的快速光曲线初始斜率下降幅度较大,曲线下降部分的斜率、最大相对电子传递速率、半饱和光强的上升幅度均小于自然光下生长的叶片,光能利用能力较低,其非光化学猝灭系数nPQ也明显低于自然光下生长的叶片,为自然光下生长叶片的87.5%。弱光下生长的小麦叶片光能吸收能力增强,但较低的光能利用能力和过剩光能耗散能力是其转入自然强光后易发生光抑制甚至光破坏的主要原因。To further explain the mechanism of photoinhibition and light damage in wheat(Triticum aestivum L.) leaves when it was suddenly transferred from low light to high light conditions,the responses of photosynthetic apparatus in shaded leaves of the high-yielding winter wheat line,PH01-35,were examined using chlorophyll fluorescence and gas exchange techniques.After 15-day shading,the chlorophyll content increased greatly,but the net photosynthetic rate(Pn),light compensation point(LCP),light saturation point(LSP),apparent quantum yield(AQY),and carboxylation efficiency(CE) all decreased.Compared with leaves grown in full sunlight,the initial slope(α),decline slope(β),maximum relative electron transport rate(rETRmax),and minimum saturating irradiance(Ek) of rapid light curves in leaves grown in low light were lower when the plant was transferred from low light intensity of 250 μmol m-2 s-1 to high light intensity of 1 200 μmol m-2 s-1.Non photochemical quenching(NPQ) in leaves grown in low light was significantly lower than that in leaves grown in full sunlight,indicating that the ability of light use and thermal energy dissipation was limited in leaves grown in low light.The wheat leaves grown in low light were more suscepti-ble to photoinhibition due to low CO2 assimilation and photoprotective ability,such as xanthophylls cycle-dependent dissipation of excessive energy,despite the better energy absorbability in low light conditions.山东省农业良种工程重大课题(鲁农良种字[2006]6号)资

原子激发辐射光的极化

偏振光也称极化光。由光学仪器产生的偏振光是大家熟悉的，而由离子与原子碰撞产生的激发辐射光的极化，则是新的原子物理研究领域之一。在基础理论方面，它可以促进原子能级结构、离子-原子碰撞机制的研究．在应用方面，可以用极化参数修正已有的原子物理数据，使数据更精确。可以用于离子束流与金属表面碰撞过程的研究等。极化研究有着美好的前景。It is well known that polarired light was producced by use of optical device. But,studies of polarised light from excited atom is a new reseach field in atomic coliision physics. In basic theory aspect,studies of potalhation effect to promote Research in structure of atomic leveis and dynamic of ion-atomcollision. In technique application aspect, atomic date will be revised by polarization parameter. Palarization effect can be use to study of process of ion-metal surface collision, et al. All these is goodp..

用于原子光谱及寿命测量的靶室自动控制装置

研制了一套用于原子激发光谱及激发能级寿命测量的，由计算机、步进马达等九部分组成的靶室自动控制设备。软件由主控程序等三个分程序组成。靶位移动全程为６５ｃｍ，步距为８．３ｕｍ，精度为２ｍｍ±１８ｕｍ。设备结构简单、运行可靠、操作方便，常用参数可外输入，并有双重保护。An automatically controlled apparatus of target chamber was made to measure spectra of the excited atoms and lifetime of the excited levels. The hardware is composed of nine parts including a computer and a step-motor, while the software consists of three branch programs. The maximum movable distance of target position is 65cm with a step-length of 8.3 u m and a precision of ±18 u m per 2mm. On account of simple structure and double, protection, the apparatus exhibits flexibility and reliability in years se..

a publicly verifiable secret sharing scheme with information-theoretic security

基于信息理论安全的承诺方案和知识的零知识证明协议,构造一个公开可验证的密钥共享方案.在该方案中,任何参与者在密钥分布协议中都能验证其他参与者密钥分块的有效性,且在密钥重构中,仅密钥分块的接收者能验证该分块的有效性.对比可验证的密钥共享方案,该方案更具实用性,是一个独到的具有信息理论意义下安全的公开可验证密钥共享方案

高离化态氖的类H、类He离子激发光谱的研究

利用束箔技术研究由重离子加速器提供的４７ＭｅＶ能量的Ｎｅ离子，穿过厚度为３９μｇ／ｃｍ２的碳箔而产生高离化态类Ｈ（ＮｅＸ）、类Ｈｅ（ＮｅⅨ）离子激发谱的情况。Spectra of H-like. He--like Neon obtained at an Energy of 47MeV pass through a39μg/cm￣2 Carbon foil, have been studied using Beam foil technigue.国家自然科学基

高电离态离子束箔光谱学研究

利用束箔技术研究由重离子加速器提供的47MeV能量的氖离子和94MeV能量的氛离子,分别和不同材料、不同厚度的碳箔（39μg／cm2）和铝箔（3.4mg／cm2）相互作用,产生高电离态的氖和氩离子,并测量了这些离子的激发光谱和某些能级寿命。This work was carried out at heaVy ion accelerator in IMP by using beamfoil technique. Ne ion at 47MeV and Ar ion at 94MeV from accelerator interacted with C-foil respectively. Excited spectra and lifetAne of some leveis of highly ionized Ne and Ar ion were sLudied.国家自然科学基

不同稀释剂对改性环糊精手性分离的影响

用α－苯乙胺、反式－二氯菊酸甲酯做手性试剂，考察了５种稀释剂稀释２，６－二－Ｏ－Ｔ基－３－Ｏ＝丁酰基－β－环糊精的对映体拆分效果。结果表明，用ＳＰ－７９做知释剂与ＯＶ－７、ＯＶ－１７０１、ＳＥ－５４、ＰＥＧ－２０Ｍ等相比，前者有基本相同的柱效、略高或基本一致的对映体选择性。通过焓熵关系分析发现，选用所述不同稀释剂不改变手性拆分机制