An interspecies conserved antigen ofPlasmodium falciparum containing clusters of asparagine residues

An interspecies conservedPlasmodium asparagine rich antigen, designated as ARK26, was isolated by immunoscreeningP. falciparum genomic DNA expression library with mouse convalescent anti-P. yeolii serum. Partial DNA sequence analysis reveals that ARK26 contains clusters of asparagines and no randomly repeated amino acid sequence motifs are observed. A 65×10³ GST fusion protein is expressed by recombinant plasmid PGEX-5X-1 (ARK26) inE. coli C strain ABLE-K. Computer programs predict that two asparagine rich regions are among the possible antigenic epitopes of p37 encoded by ARK26. Interestingly, the sequence of ARK26 displays significant similarity to yeast and several other species’ mitochondrial genes, and its possible function is discussed. Supported by a fellowship offered by International Center for Genetic Engineering & Biotechnology(ICGEB) Ma Donghui: born in 1969, Graduate student     

Clay minerals in paleosols of cretaceous age in Istria, Croatia

Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonate sediments of Istria where they mark the top of fining upwards sequences. When they show evidence of subaerial exposure and pedogenesis they are considered paleosols. The clay mineralogical composition is as follow: (1) randomly oriented I/S mixed layer, (2) regularly oriented I/S mixed layer, (3) illitic material, (4) kaolinite and (5) chlorite. The insoluble limestone residue situated immediately below the greenish clays is dominated by smectite, and also contains kaolinite and illitic material. The very high smectite content in the insoluble residue is probably the result of additions of volcanic dust during carbonate sedimentation. That clay mineral composition in the pelitic material clearly indicates the influence of both pedogenic and diagenetic processes. It may also indicate additional volcanic dust contribution before and during the subaerial exposure.     

关于极大Euler3-序列(dp=4)的平面实现

研究ｄ１ － ｄｐ ＝ ３ 且ｄｐ ＝ ４ 即７ｋ１６ｋ２５ｋ３４ｋ４ 的极大Ｅｕｌｅｒ３序列是否平面序列的问题；对ｐ ＝ ８ 至１４ 的６５ 种极大Ｅｕｌｅｒ３序列（ｄｐ ＝ ４） 进行了研究，其中５２ 种序列为平面序列，给出了相应的平面实现；９ 种序列为非平面序列，并给出了相应的证明．     

B值适应可积序列的变换与Banach空间的光滑性和凸性

主要应用Ｂ值适应可积序列变换的性质刻划了Ｂａｎａｃｈ空间的光滑性和凸性。     

人类DNA序列图形化参数的提取和应用

在DNA序列郝柏林图形化表示方法的基础上,提取出表征图形特征的两个量化参数：信息熵和分形盒维．对人类基因序列和非基因序列各50个片段进行郝柏林图形化和特征参数的提取,结果表明：这两个参数具有区分人类基因序列和非基因序列的统计规律．     

蕴含（K_4-e）＋C_4可图序列的刻画

对于给定的图H,称π是蕴含H可图的,如果π有一个实现包含H作为子图.Kk,Ck,Pk分别表示k阶完全图,圈长为k的圈和路长为k的路.本文刻画了当n≥6时,蕴含（K4-e）＋C4的可图序列.     

一类具有逐段常变量微分方程的渐近概周期解的存在性

本文给出了Z^＋上渐近概周期序列的一些等价判别,并利用差分方程的渐近概周期序列解,讨论了一类具有逐段常变量微分方程的渐近概周期解的存在性。     

心动图返流束特征提取及表示方法

将图象处理和信号处理的相关理论和方法用于动态彩色超声心动图影象分析,提出了一种返流束分割和特征提取表示的方法,该方法利用Ｈｏｕｇｈ变换、坐标映射及其他信号处理方法完成背景空腔的分割,并从血流显像的彩色特性和几何特性出发,用模糊聚类的方法得到了返流束分割。还对血流进行后处理和表示方法进行了研究。实验结果表明了本提出的方法是有效的,其结果对于临床医学也很有意义。     

关于非齐次隐马尔科夫模型的强极限定理

利用杨卫国提出的方法, 研究非齐次隐马尔科夫模型三元泛函的强极限定理.作为推论, 得到了一个已有的结论.     

Banach空间中的渐近拟非扩张型映象不动点的具混合误差的Ishikawa迭代逼近问题

在更一般的条件下研究了Banach空间中渐近拟非扩张型映象的具误差或混合误差的Ishikawa迭代序列强收敛到其不动点的充分必要条件.