区组长度为4和5的几乎广义平衡赛程设计

一个几乎广义平衡赛程设计NGBTD（k,m）是一个定义在km＋1元集V上的（km＋1,k,k-1）-BIBD,它的区组可按如下方法安排在一个m×（km＋1）表阵中：（1）每列中所有区组构成V＼{x}（x∈V）的一个部分平行类;（2）V中每个元素恰出现在每行的南个位置．完全解决了NGBTD（4,m）的存在性问题以及除4个可能例外值外的NGBTD（5,m）的存在性问题．     

EFFECT OF PHOTODYNAMIC THERAPY ON ANTITUMOR IMMUNE DEFENSES: COMPARISON OF THE PHOTOSENSITIZERS HEMATOPORPHYRIN DERIVATIVE AND CHLORO-ALUMINUM SULFONATED PHTHALOCYANINE

The effects of the two photosensitizers chloroaluminum sulfonated phthalocyanine (ClAlSPc) and hematoporphyrin derivative (HpD) on the functional activities of macrophages and natural killer (NK) cells, two immunocyte populations implicated in the control of tumor development and spread, have been investigated. Murine peritoneal macrophages treated in vivo with ClAlSPc or HpD at 10 mg/kg body weight showed no impairment of Fc-mediated phagocytic capacity and only minor disturbances of in vitro tumoricidal/tumoristatic function. The NK cell activity of splenocytes obtained from photosensitizer-treated mice, assayed 24 or 48 h after i.v. injection of ClAlSPc or HpD at 10 mg/kg was unaffected compared to controls. However significant inhibition of NK activity was observed when splenocytes obtained from mice with or without subcutaneous Colo 26 tumors, treated with ClAlSPc plus laser therapy (675 nm) were used as effector cells. The results show that impairment of some anti-tumor activity can be observed in phthalocyanine treated or phthalocyanine + laser-treated animals but this relatively minor impairment may augur well for the use of systemic phthalocyanine administration in photodynamic therapy.     

分层不动点及变分不等式的粘性方法及应用

介绍了处理变分不等式问题的一种分层不动点的粘性方法．这一方法所涉及的映像是非扩张的,而其解是从另一非扩张映像的不动点集中求出．在文末,还把这一结果应用于研究单调变分不等式问题、凸规划问题、分层极小化问题及在不动点集上的二次极小化问题．     

人类唾液蛋白N 端片段的构型

人类唾液蛋白Statherin 是含有43 残基的酸性磷酸化蛋白．此蛋白对磷酸钙具有较高的吸附性,已知其N 端15 残基的片段(SN-15)会吸附于磷灰石的表面．在该工作中,作者以液体核磁共振波谱学研究SN-15 的分子结构．圆二色光谱显示SN-15 在磷酸盐缓冲溶液中具α 螺旋构型．根据高分辨核磁共振氢谱(COSY,TOCSY 及NOESY)作者得到相关的NOE 及J 耦合数据,氢氘交换实验也进一步显示SN-15 具α 螺旋构型．     

一种以超分辨率理论为基础的磁共振眼球成像方法

磁共振成像（MRI）是一种无电离辐射的非介入性的眼内肿瘤检测方法,但分辨率和运动伪影是成像过程中不易克服的困难．以往的扫描方法或是不可避免的引入运动伪影,或是需要受试者做精确的配合,增加了成像的难度,给受试者带来不舒适的体验．本文提出了一种以超分辨率理论为基础的新的磁共振眼球成像方法,使用一种特制的眼球线圈,对眼部区域扫描一系列动态的图像,使得不同方向上的采集分辨率互补．最后经过预处理、配准、超分辨率重建等操作,得到高质量的磁共振眼球图像．实验结果表明,这种方法可以在不需要受试者做额外配合工作的情况下,得到更加清晰的磁共振眼球图像．     

不动点问题平衡问题及变分不等式问题的具弱压缩的粘性逼近

借助具弱压缩的粘性逼近,提出一种新的修正的迭代算法,用以寻求一公共元,它既是一无穷族非扩张映像的公共不动点集中的点,也是一有限族的平衡问题的解集中的点,而且它还是一变分不等式的解．在适当的条件下,一些强收敛定理在Hilbert空间的框架下被建立．所得结果推广和改进了Colao等,Plubtieng 等,Colao等,Yao等及其他人的一些最新的结果．     

Studies on Fundamental Processes During Laser Ablation using Time-of-Flight Mass-Spectrometry (TOF-MS)

When a short pulsed, high power laser is focused on any solid target,a portion of the material is instantaneously exploded into its vapor. Laser ablation is a term to describe this explosive laser material interaction. Various processes like ejection of ions,atoms and clusters, thermal evaporation, plasma initiation and expansion, interaction between the plasma and the target, may result.     

Enantioselective Hydrogenation of Acetophenone over Cinchonidine-Stabilized and Supported Rhodium Clusters

Because of the importance of the chirality in chemicals in everyday, the synthesis of enantiomerically pure chiral compounds has become an important academic and commercial advantage. In asymmetric synthesis field, enantioselective catalysis has been the most challenging subject over the past decades. Among the numerous enantioselective heterogeneous catalysts, the rhodium is always an unsuccessful example under favorable reaction conditions with only 20%-30% enantiomeric excess (e.e.)^[1].And almost all of papers about heterogeneous enantioselective catalysis have reported that rhodium is not suitable for heterogeneous enantioselective hydrogenation^[1-3].     

基体改进效应应用于石墨炉原子吸收测定汞

微克量贵金属可以改进基体,以防止汞在干燥和灰化过程中的严重损失.钯存在时,最高允许灰化温度为500℃,比应用硫化铵所能达到的灰化温度高200℃,并且干扰少,又不需要任何分离步骤,可用以测定废水中的痕量(0.2毫微克)汞.     

磁控溅射淀积掺Er富Si氧化硅膜中Er3+ 1.54μm光致发光

用磁控溅射淀积不同富Si程度的掺Er富Si氧化硅薄膜.室温下测量其光致发光谱,观察到各谱中都含有1.54和1.38μm两个发光峰,其中1.54和1.38μm的光致发光峰分别来自Er³⁺和氧化硅中某种缺陷.系统研究了Er³⁺1.54μm光致发光峰强度对富Si程度及退火温度的依赖关系.还发现1.54μm发光峰强度与1.38μm发光峰强度相互关联,对此进行了讨论 关键词： Er 富Si氧化硅 光致发光 纳米硅