原发性宫颈恶性淋巴瘤1例报告并文献复习

恶性淋巴瘤是一种起源于淋巴结或结外部位淋巴组织的免疫细胞肿瘤,约1/4的来源于结外器官。结外恶性淋巴瘤最常见的部位是胃肠道和皮肤,来源于女性生殖道系统的临床少见,其中以卵巢和宫颈较多见,宫体、阴道和外阴受累仅有个案报道。南昌大学第一附属医院诊断1例原发性宫颈恶性淋巴瘤（primary malignant lymphoma of the cervix,PCL）,现结合文献复习,报告如下。     

OFDM系统中基于软干扰抵消的Turbo均衡算法研究

针对OFDM系统中子载波间干扰带来的性能恶化问题,在最优Turbo均衡的基础上,提出了基于软干扰对消技术的MAP均衡算法。Turbo均衡部分首先利用先验信息进行干扰抵消,然后通过干扰抵消输出结果计算编码比特后验概率;同时对信道矩阵进行带状近似,提出简化算法,运算复杂度进一步降低。通过仿真分析表明,相比于传统turbo均衡算法,该算法在工程应用中更具有可行性。     

雷丸的中性金属蛋白酶的分离纯化、酶学性质及体外驱虫活性

A neutral metalloprotease was purified from the cultured mycelia of Laccocephalum mylittae, an effective medicinal fungus widely used in anthelmintic therapy. The protease was purified to homogeneity with 31.85-fold purification and a final yield of 21.76%. The subunit molecular weight of the protease is about 40000 estimated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). The optimum reaction pH and temperature are 7.5 and 50ºC, respectively. The protease activity is largely enhanced by Ca2+, but highly inhibited by tetrasodium ethylenediaminetetraacetate (EDTA), a metal-chelator, suggesting that the enzyme is a metalloprotease. The Michaelis-Menten constan Km and Vmax value for casein substrate are 6.09 mg&;#8226;ml－1 and 21.32 μg&;#8226;min－1&;#8226;ml－1, respectively. In vitro anthelmintic tests of the protease exhibit distinct lethal effects on the third stage larvae (L3) of Ascaris suum. Scanning electron microscopy and SDS-PAGE analysis indicates that the proteolysis of larvae proteins caused by this protease may relate to the anthelmintic activity of L. mylittae.